for Journals by Title or ISSN
for Articles by Keywords
  Subjects -> ENVIRONMENTAL STUDIES (Total: 753 journals)
    - ENVIRONMENTAL STUDIES (680 journals)
    - POLLUTION (22 journals)
    - WASTE MANAGEMENT (10 journals)

ENVIRONMENTAL STUDIES (680 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 378 Journals sorted alphabetically
Acta Ecologica Sinica     Open Access   (Followers: 8)
Acta Limnologica Brasiliensia     Open Access   (Followers: 2)
Acta Oecologica     Hybrid Journal   (Followers: 9)
Acta Regionalia et Environmentalica     Open Access  
Advances in Ecological Research     Full-text available via subscription   (Followers: 39)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 18)
Advances in Life Science and Technology     Open Access   (Followers: 12)
Aeolian Research     Hybrid Journal   (Followers: 5)
African Journal of Environmental Science and Technology     Open Access   (Followers: 2)
Agricultura Tecnica     Open Access   (Followers: 6)
Agro-Science     Full-text available via subscription  
Agronomy for Sustainable Development     Hybrid Journal   (Followers: 10)
Amazon's Research and Environmental Law     Open Access  
Ambiente & sociedade     Open Access   (Followers: 2)
Ambiente & Agua : An Interdisciplinary Journal of Applied Science     Open Access   (Followers: 1)
American Journal of Environmental Engineering     Open Access   (Followers: 15)
American Journal of Environmental Protection     Open Access   (Followers: 6)
American Journal of Environmental Sciences     Open Access   (Followers: 13)
American Journal of Microbiology     Open Access   (Followers: 13)
American Naturalist     Full-text available via subscription   (Followers: 58)
Annals of GIS     Hybrid Journal   (Followers: 19)
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation     Open Access  
Annual Review of Ecology, Evolution, and Systematics     Full-text available via subscription   (Followers: 47)
Annual Review of Environment and Resources     Full-text available via subscription   (Followers: 15)
Annual Review of Pharmacology and Toxicology     Full-text available via subscription   (Followers: 26)
Annual Review of Resource Economics     Full-text available via subscription   (Followers: 11)
Applied and Environmental Soil Science     Open Access   (Followers: 14)
Applied Ecology and Environmental Sciences     Open Access   (Followers: 15)
Applied Environmental Education & Communication     Hybrid Journal   (Followers: 13)
Aquatic Ecology     Hybrid Journal   (Followers: 28)
Aquatic Toxicology     Hybrid Journal   (Followers: 17)
Archives des Maladies Professionnelles et de l'Environnement     Full-text available via subscription  
Archives of Environmental and Occupational Health     Hybrid Journal   (Followers: 6)
Archives of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 8)
Archives of Environmental Protection     Open Access   (Followers: 6)
Archives of Toxicology     Hybrid Journal   (Followers: 15)
Asia Pacific Journal of Environment Ecology and Sustainable Development     Open Access   (Followers: 5)
Asian Journal of Rural Development     Open Access   (Followers: 7)
Asian Review of Environmental and Earth Sciences     Open Access   (Followers: 1)
Atas de Saúde Ambiental - ASA     Open Access  
ATBU Journal of Environmental Technology     Open Access   (Followers: 2)
Atmospheric and Climate Sciences     Open Access   (Followers: 25)
Atmospheric Environment     Hybrid Journal   (Followers: 55)
Austral Ecology     Hybrid Journal   (Followers: 12)
Australasian Journal of Environmental Management     Hybrid Journal   (Followers: 9)
Australasian Journal of Human Security, The     Full-text available via subscription   (Followers: 3)
Avicenna Journal of Environmental Health Engineering     Open Access   (Followers: 1)
Basic & Clinical Pharmacology & Toxicology     Hybrid Journal   (Followers: 9)
Basic and Applied Ecology     Hybrid Journal   (Followers: 16)
Behavioral Ecology     Hybrid Journal   (Followers: 45)
Behavioral Ecology and Sociobiology     Hybrid Journal   (Followers: 33)
Biodegradation     Hybrid Journal   (Followers: 1)
Biodiversity     Hybrid Journal   (Followers: 26)
Biofouling: The Journal of Bioadhesion and Biofilm Research     Hybrid Journal   (Followers: 5)
Bioremediation Journal     Hybrid Journal   (Followers: 5)
BioRisk     Open Access   (Followers: 3)
BMC Ecology     Open Access   (Followers: 17)
Boletín Semillas Ambientales     Open Access  
Boston College Environmental Affairs Law Review     Open Access   (Followers: 6)
Bothalia : African Biodiversity & Conservation     Open Access   (Followers: 1)
Built Environment     Full-text available via subscription   (Followers: 4)
Bulletin of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 9)
Bulletin of the American Meteorological Society     Open Access   (Followers: 31)
Business, Peace and Sustainable Development     Full-text available via subscription   (Followers: 4)
Canadian Journal of Earth Sciences     Full-text available via subscription   (Followers: 6)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 38)
Canadian Journal of Soil Science     Full-text available via subscription   (Followers: 13)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 20)
Capitalism Nature Socialism     Hybrid Journal   (Followers: 11)
Casopis Slezskeho Zemskeho Muzea - serie A - vedy prirodni     Open Access  
Cell Biology and Toxicology     Hybrid Journal   (Followers: 12)
Chain Reaction     Full-text available via subscription   (Followers: 1)
Challenges in Sustainability     Open Access   (Followers: 1)
Change and Adaptation in Socio-Ecological Systems     Open Access   (Followers: 1)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 18)
Chemico-Biological Interactions     Hybrid Journal   (Followers: 3)
Chemosphere     Hybrid Journal   (Followers: 12)
Child and Adolescent Mental Health     Hybrid Journal   (Followers: 60)
Civil and Environmental Engineering     Open Access   (Followers: 7)
Civil And Environmental Engineering Reports     Open Access   (Followers: 4)
Civil and Environmental Research     Open Access   (Followers: 16)
CLEAN - Soil, Air, Water     Hybrid Journal   (Followers: 18)
Clean Technologies and Environmental Policy     Hybrid Journal   (Followers: 6)
Cleanroom Technology     Full-text available via subscription   (Followers: 1)
Climate Change Economics     Hybrid Journal   (Followers: 10)
Climate Policy     Hybrid Journal   (Followers: 28)
Coastal Engineering Journal     Hybrid Journal   (Followers: 3)
Cogent Environmental Science     Open Access  
Columbia Journal of Environmental Law     Free   (Followers: 10)
Computational Ecology and Software     Open Access   (Followers: 8)
Computational Water, Energy, and Environmental Engineering     Open Access   (Followers: 4)
Conservation and Society     Open Access   (Followers: 10)
Conservation Letters     Open Access   (Followers: 28)
Conservation Science     Open Access   (Followers: 15)
Contemporary Problems of Ecology     Hybrid Journal   (Followers: 6)
Critical Reviews in Environmental Science and Technology     Hybrid Journal   (Followers: 12)
Critical Reviews in Toxicology     Hybrid Journal   (Followers: 21)
Culture, Agriculture, Food and Environment     Hybrid Journal   (Followers: 6)
Current Environmental Health Reports     Hybrid Journal  
Current Forestry Reports     Hybrid Journal  
Current Opinion in Environmental Sustainability     Hybrid Journal   (Followers: 10)
Current Sustainable/Renewable Energy Reports     Hybrid Journal   (Followers: 4)
Developments in Atmospheric Science     Full-text available via subscription   (Followers: 10)
Developments in Earth and Environmental Sciences     Full-text available via subscription   (Followers: 5)
Developments in Earth Surface Processes     Full-text available via subscription   (Followers: 3)
Developments in Environmental Modelling     Full-text available via subscription   (Followers: 7)
Developments in Environmental Science     Full-text available via subscription   (Followers: 6)
Developments in Integrated Environmental Assessment     Full-text available via subscription   (Followers: 5)
Disaster Prevention and Management     Hybrid Journal   (Followers: 18)
Drug and Chemical Toxicology     Hybrid Journal   (Followers: 12)
Duke Environmental Law & Policy Forum     Open Access   (Followers: 6)
E3S Web of Conferences     Open Access  
Earth Interactions     Full-text available via subscription   (Followers: 11)
Earth Science Informatics     Hybrid Journal   (Followers: 3)
Earth System Science Data (ESSD)     Open Access   (Followers: 7)
Earth System Science Data Discussions (ESSDD)     Open Access   (Followers: 6)
Earthquake Science     Hybrid Journal   (Followers: 9)
EchoGéo     Open Access   (Followers: 1)
Ecohydrology     Hybrid Journal   (Followers: 9)
Ecohydrology & Hydrobiology     Full-text available via subscription   (Followers: 3)
Ecologia Aplicada     Open Access  
Ecología en Bolivia     Open Access  
Ecological Applications     Full-text available via subscription   (Followers: 123)
Ecological Chemistry and Engineering S     Open Access   (Followers: 2)
Ecological Complexity     Hybrid Journal   (Followers: 8)
Ecological Indicators     Hybrid Journal   (Followers: 16)
Ecological Informatics     Hybrid Journal   (Followers: 5)
Ecological Management & Restoration     Hybrid Journal   (Followers: 15)
Ecological Modelling     Hybrid Journal   (Followers: 87)
Ecological Monographs     Full-text available via subscription   (Followers: 29)
Ecological Processes     Open Access   (Followers: 6)
Ecological Questions     Open Access   (Followers: 7)
Ecological Research     Hybrid Journal   (Followers: 9)
Ecological Restoration     Full-text available via subscription   (Followers: 22)
Ecologist, The     Full-text available via subscription   (Followers: 26)
Ecology     Full-text available via subscription   (Followers: 246)
Ecology and Evolution     Open Access   (Followers: 49)
Ecology Letters     Hybrid Journal   (Followers: 156)
Economics and Policy of Energy and the Environment     Full-text available via subscription   (Followers: 8)
Économie rurale     Open Access   (Followers: 1)
Ecoprint : An International Journal of Ecology     Open Access   (Followers: 2)
Ecopsychology     Hybrid Journal   (Followers: 6)
Ecosphere     Hybrid Journal   (Followers: 3)
Ecosystem Services     Hybrid Journal   (Followers: 6)
Ecosystems     Hybrid Journal   (Followers: 25)
Ecotoxicology     Hybrid Journal   (Followers: 11)
Ecotoxicology and Environmental Safety     Hybrid Journal   (Followers: 7)
Ecozon@ : European Journal of Literature, Culture and Environment     Open Access   (Followers: 3)
Ekologija     Open Access  
Electronic Green Journal     Open Access   (Followers: 6)
Elementa : Science of the Anthropocene     Open Access   (Followers: 1)
Empowering Sustainability International Journal     Open Access   (Followers: 1)
Energy & Environmental Science     Full-text available via subscription   (Followers: 19)
Energy and Environment Focus     Free   (Followers: 6)
Energy and Environment Research     Open Access   (Followers: 11)
Energy and Environmental Engineering     Open Access   (Followers: 6)
Engenharia Sanitaria e Ambiental     Open Access  
Envigogika     Open Access  
Environment and Behavior     Hybrid Journal   (Followers: 18)
Environment and Ecology Research     Open Access   (Followers: 5)
Environment and Natural Resources Research     Open Access   (Followers: 10)
Environment and Planning A     Full-text available via subscription   (Followers: 40)
Environment and Planning B : Planning and Design     Full-text available via subscription   (Followers: 33)
Environment and Planning C : Government and Policy     Full-text available via subscription   (Followers: 31)
Environment and Planning D : Society and Space     Full-text available via subscription   (Followers: 41)
Environment and Pollution     Open Access   (Followers: 10)
Environment International     Hybrid Journal   (Followers: 10)
Environment of Care News     Full-text available via subscription   (Followers: 1)
Environment Systems & Decisions     Hybrid Journal   (Followers: 4)
Environment, Development and Sustainability     Hybrid Journal   (Followers: 30)
Environment, Space, Place     Full-text available via subscription   (Followers: 6)
Environment: Science and Policy for Sustainable Development     Hybrid Journal   (Followers: 44)
Environmental & Engineering Geoscience     Full-text available via subscription   (Followers: 3)
Environmental & Socio-economic Studies     Open Access  
Environmental and Climate Technologies     Open Access   (Followers: 3)
Environmental and Molecular Mutagenesis     Hybrid Journal   (Followers: 1)
Environmental Bioindicators     Hybrid Journal   (Followers: 2)
Environmental Chemistry     Hybrid Journal   (Followers: 5)
Environmental Chemistry Letters     Hybrid Journal   (Followers: 2)
Environmental Claims Journal     Hybrid Journal   (Followers: 1)
Environmental Communication: A Journal of Nature and Culture     Hybrid Journal   (Followers: 19)
Environmental Development     Hybrid Journal   (Followers: 3)
Environmental Education Research     Hybrid Journal   (Followers: 14)
Environmental Engineering Science     Hybrid Journal   (Followers: 9)
Environmental Ethics     Hybrid Journal   (Followers: 6)
Environmental Evidence     Open Access   (Followers: 1)
Environmental Fluid Mechanics     Hybrid Journal   (Followers: 3)
Environmental Forensics     Hybrid Journal   (Followers: 1)
Environmental Geosciences     Full-text available via subscription   (Followers: 4)
Environmental Geotechnics     Hybrid Journal   (Followers: 3)
Environmental Hazards     Hybrid Journal   (Followers: 2)
Environmental Health     Open Access   (Followers: 10)
Environmental Health Insights     Open Access   (Followers: 4)
Environmental Health Perspectives (EHP)     Open Access   (Followers: 15)
Environmental History     Hybrid Journal   (Followers: 23)
Environmental Impact Assessment Review     Hybrid Journal   (Followers: 20)
Environmental Innovation and Societal Transitions     Hybrid Journal   (Followers: 4)
Environmental Justice     Hybrid Journal   (Followers: 9)
Environmental Law Review     Full-text available via subscription   (Followers: 24)
Environmental Management     Hybrid Journal   (Followers: 45)

        1 2 3 4 | Last

Journal Cover Basic & Clinical Pharmacology & Toxicology
  [SJR: 0.539]   [H-I: 70]   [9 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1742-7835 - ISSN (Online) 1742-7843
   Published by John Wiley and Sons Homepage  [1611 journals]
  • Modelling Mutational Signatures of Human Carcinogens using Experimental
    • Authors: Maria Zhivagui; Michael Korenjak, Jiri Zavadil
      Abstract: Mutation spectra in cancer genomes provide information on the disease aetiology and the causality underlying the evolution and progression of cancer. Genome-wide mutation patterns reflect the effects of mutagenic insults and can thus reveal past carcinogen-specific exposures and inform hypotheses on the causative factors for specific cancer types. In order to identify mutation profiles in human cancers, single genes studies were first employed, focusing mainly on the tumour suppressor gene TP53. Furthermore, experimental studies had been developed in model organisms. They allowed the characterization of the mutation patterns specific to known human carcinogens, such as polycyclic aromatic hydrocarbons or ultraviolet light. With the advent of massively parallel sequencing, mutation landscapes became generated on a large scale, in human primary tumours and in experimental models, enabling deeper investigations of the functional and structural impact of the mutations on the genome, including exposure-specific base-change fingerprints known as mutational signatures. These studies can now accelerate the identification of aetiological factors, contribute to carcinogen evaluation and classification, and ultimately inform cancer prevention measures.This article is protected by copyright. All rights reserved.
      PubDate: 2016-10-18T09:25:27.045174-05:
      DOI: 10.1111/bcpt.12690
  • Is Nickel Chloride really a Non-Genotoxic Carcinogen?
    • Authors: Leanne Stannard; Shareen H. Doak, Ann Doherty, Gareth J. Jenkins
      Abstract: Humans are exposed to carcinogens through air, water, food and tobacco smoke. Nickel chloride (NiCl2) is a toxic and carcinogenic environmental and occupational pollutant, which was previously classified as a non-genotoxic carcinogen, and thought to not directly alter the DNA. Non-genotoxic carcinogens like NiCl2 are difficult to detect in vitro, hence a heavy reliance on animal studies exists.NiCl2 has previously been classified as a non-genotoxic carcinogen (NGTC); however, after studying the effect of NiCl2 on many mechanistic endpoints, it has become clear that NiCl2 behaves more like a genotoxic carcinogen. The induction of reactive oxygen species (ROS) after treatment with NiCl2, along with positive micronuclei results from a preliminary 5-day chronic dose micronucleus study further support that NiCl2 has been misclassified as a NGTC. It is possible that NiCl2 causes indirect DNA damage by the production of ROS and requires a longer, chronic exposure, which is more similar to that of human exposure.This article is protected by copyright. All rights reserved.
      PubDate: 2016-10-17T04:15:35.155947-05:
      DOI: 10.1111/bcpt.12689
  • Lipid-soluble Cigarette Smoke Particles Induced Vascular Endothelin Type A
           Receptor Up-Regulation through Activation of ERK1/2 Signal Pathways
    • Authors: Yaping Zhang; Wei Zhang, Lars Edvinsson, Cang-Bao Xu
      Abstract: Abnormal contraction of vessels termed “vasospasm” is associated with various cardiovascular diseases. Smoking is a well-known risk factor that increases vasospasm. However, the molecular mechanisms by which smoking leads to vasospasm and cardiovascular disease are not fully understood. The present study was designed to examine if DMSO-extracted cigarette smoke particles (DSP) could induce up-regulation of vascular endothelin type A (ETA) receptors, and if ETA receptor is up-regulated through activation of extracellular regulated protein kinase 1 and 2 (ERK1/2) signal pathways. Mesenteric arterial segments from rats were cultured in the presence of DSP, water-extracted cigarette smoke particles (WSP), or equivalent concentration of nicotine for up to 24 hr. The results showed that DSP, but not WSP or nicotine, induced ETA receptor up-regulation with increased ETA receptor-mediated contraction (myograph, P
      PubDate: 2016-10-12T09:14:16.805361-05:
      DOI: 10.1111/bcpt.12688
  • Repression of MicroRNA-372 by Arsenic Sulfide Inhibits Prostate Cancer
           Cell Proliferation and Migration through Regulation of LATS2
    • Authors: Hongwen Cao; Yigeng Feng, Lei Chen
      Abstract: As the main component of realgar, arsenic sulfide (As4S4) contains anti-tumour activity by repressing cancer cell proliferation and migration in many tumours. However, the detailed mechanism of these processes is not clear yet. MicroRNAs (miRNAs) can function as tumour suppressor or oncogene based on their target mRNAs in different tumour tissues. Here, we found that As4S4 could repress the over-expression of microRNA-372 (miR-372) in two prostate cancer cell lines and its over-expression promoted cell proliferation and migration. LATS2 (large tumour suppressor kinase 2) was confirmed as a direct target of miR-372 using luciferase assays in these two prostate cancer cell lines. Down-regulation of LATS2 could promote prostate cancer cell proliferation and migration just as over-expression of miR-372 did and over-expression of LATS2 could reverse this effect of miR-372. The anti-tumour activity of As4S4 and the oncogenic function of miR-372 were further confirmed using a mouse xenograft model. Altogether, our data showed evidence that repressing the over-expression of miR-372 by As4S4 could inhibit prostate cancer cell proliferation and migration by targeting LATS2. Therefore, miR-372 may be a possible biomarker for the prediction of prostate cancer and As4S4 may have potential therapeutic function for prostate cancer.This article is protected by copyright. All rights reserved.
      PubDate: 2016-10-12T02:21:41.744584-05:
      DOI: 10.1111/bcpt.12687
  • Distinct Metabolic Profile of Inhaled Budesonide and Salbutamol in
           Asthmatic Children during Acute Exacerbation
    • Authors: Yang Quan-Jun; Zhang Jian-Ping, Zhang Jian-Hua, Han Yong-Long, Xin Bo, Zhang Jing-Xian, Dai Bona, Zhang Yuan, Guo Cheng
      Abstract: Inhaled budesonide and salbutamol represent the most important and frequently used drugs in asthmatic children during acute exacerbation. However, there is still no consensus about their resulting metabolic derangements; thus, the present study was conducted to determine the distinct metabolic profiles of these two drugs. A total of 69 children with asthma during acute exacerbation were included, and their serum and urine were investigated using high-resolution nuclear magnetic resonance (NMR). A metabolomics analysis was performed using a principal component analysis and orthogonal signal correction-partial least squares using SIMCA-P. The different metabolites were identified, and the distinct metabolic profiles were analysed using MetPA. A high-resolution NMR-based serum and urine metabolomics approach was established to study the overall metabolic changes after inhaled budesonide and salbutamol in asthmatic children during acute exacerbation. The perturbed metabolites included 22 different metabolites in the serum and 21 metabolites in the urine. Based on an integrated analysis, the changed metabolites included the following: increased 4-hydroxybutyrate, lactate, cis-aconitate, 5-hydroxyindoleacetate, taurine, trans-4-hydroxy-l-proline, tiglylglycine, 3-hydroxybutyrate, 3-methylhistidine, glucose, cis-aconitate, 2-deoxyinosine, and 2-aminoadipate; and decreased alanine, glycerol, arginine, glycylproline, 2-hydroxy-3-methylvalerate, creatine, citrulline, glutamate, asparagine, 2-hydroxyvalerate, citrate, homoserine, histamine, sn-glycero-3-phosphocholine, sarcosine, ornithine, creatinine, glycine, isoleucine, and trimethylamine N-oxide. The MetPA analysis revealed 7 involved metabolic pathways: arginine and proline metabolism; taurine and hypotaurine metabolism; glycine, serine and threonine metabolism; glyoxylate and dicarboxylate metabolism; methane metabolism; citrate cycle; and pyruvate metabolism.The perturbed metabolic profiles suggest potential metabolic reprogramming associated with a combination treatment of inhaled budesonide and salbutamol in asthmatic children.This article is protected by copyright. All rights reserved.
      PubDate: 2016-10-12T02:14:50.747196-05:
      DOI: 10.1111/bcpt.12686
  • HAS-BLED Predicts Warfarin Control in Australian Patients treated for Deep
           Vein Thrombosis
    • Authors: Kylie Mueller; Nijole Bernaitis, Tony Badrick, Shailendra Anoopkumar-Dukie
      Abstract: The HAS-BLED model is widely utilised to assess patients’ bleed risk prior to anticoagulant therapy including warfarin. Some of the variables assessed in the model are also known to influence warfarin control, commonly measured by time in therapeutic range (TTR). The aim of the study was to determine if the HAS-BLED risk tool is a good predictor of bleed risk and warfarin control in deep vein thrombosis (DVT) patients. Retrospective data were collected for DVT warfarin care patients at Sullivan Nicolaides Pathology. Data included age, medical history and concurrent drug therapy to calculate HAS-BLED scores. INR results were used to calculate TTR with the Rosendaal method and mean TTR used for analysis and comparison. The eligible 533 patients had a mean TTR of 78.3%. Categorisation according to HAS-BLED score resulted in 150 patients classified as low risk, 331 as moderate and 52 as high risk with a haemorrhagic incidence per patient of 0.08, 0.53, and 0.54, respectively. Patients in the low, moderate and high risk HAS-BLED categories had a mean TTR of 81%, 79% and 65%, respectively, with significant differences (p
      PubDate: 2016-10-08T09:35:26.622829-05:
      DOI: 10.1111/bcpt.12685
  • Long-term Use of Z-Hypnotics and Co-Medication with Benzodiazepines and
    • Authors: Solveig Sakshaug; Marte Handal, Vidar Hjellvik, Christian Berg, Åse Ripel, Ingebjørg Gustavsen, Jørg Mørland, Svetlana Skurtveit
      Abstract: Benzodiazepine-like drugs (z-hypnotics) are the most commonly used drugs for treatment of insomnia in Norway. Z-hypnotics are recommended for short-term treatment not exceeding 4 weeks.We aimed to study the use of z-hypnotics in the adult population in Norway with focus on recurrent use in new users, treatment intensity and co-medication with benzodiazepines and opioids in long-term users.Data were obtained from the Norwegian Prescription Database. New users in 2009 were followed through 2013. Recurrent z-hypnotic use was defined as new fillings at least once in each of the four 365-day follow-up periods. Age groups 18-39, 40-64 and 65+ were analysed separately for men and women.In 2013, 354,571 (8.9%) of the population filled at least one prescription of z-hypnotics and the prevalence was relatively stable over time. Among the 92,911 new users of z-hypnotics in 2009, 13,996 (16.8%) received z-hypnotics all four 365-day periods of follow-up. In these long-term recurrent users, the treatment intensity was high already the second year, with mean annual amounts of 199 and 169 DDDs per patient in men and women, respectively. The interquartile differences were greatest in the youngest age group.27.9% of the long-term recurrent users of z-hypnotics used benzodiazepines the fourth year and 33.9% used opioids. The proportions with co-medication increased with level of z-hypnotic treatment intensity.Overall, many z-hypnotics users had medicines dispensed for longer periods than recommended, and co-medications with drugs that may reinforce the central depressing and intoxicating effects were common.This article is protected by copyright. All rights reserved.
      PubDate: 2016-10-07T08:36:23.149855-05:
      DOI: 10.1111/bcpt.12684
  • Gene-Gene Interactions among PRKCA, NOS3 and BDKRB2 Polymorphisms Affect
           the Antihypertensive Effects of Enalapril
    • Authors: Gustavo H. Oliveira-Paula; Marcelo R. Luizon, Riccardo Lacchini, Vanessa Fontana, Pamela S. Silva, Celso Biagi, E. Tanus-Santos
      Abstract: Protein kinase C (PKC) signaling is critically involved in the control of blood pressure. Angiotensin-converting enzyme inhibitors (ACEi) affect PKC expression and activity, which are partially associated with thel responses to ACEi. We examined whether PRKCA (Protein Kinase C, Alpha) polymorphisms (rs887797 C>T, rs1010544 T>C, and rs16960228 G>A), or haplotypes, and gene-gene interactions within the ACEi pathway affect the antihypertensive responses in 104 hypertensive patients treated with enalapril as monotherapy. Patients were classified as poor responders (PR) or good responders (GR) to enalapril if their changes in mean arterial pressure were lower or higher than the median value, respectively. Multifactor dimensionality reduction was used to characterize interactions among PRKCA, NOS3 (Nitric Oxide Synthase 3) and BDKRB2 (Bradykinin Receptor B2) polymorphisms. The TC+CC genotypes for the rs1010544 polymorphism were more frequent in GR than in PR (P=0.037). Conversely, the GA+AA genotypes for the rs16960228 polymorphism, and the CTA haplotype, were more frequent in PR than in GR (P=0.040 and P=0.008, respectively). Moreover, the GG genotype for the PRKCA rs16960228 polymorphism was associated with PR or GR depending on the genotypes for the rs2070744 (NOS3) and rs1799722 (BDKRB2) polymorphisms (P=0.012). Our results suggest that PRKCA polymorphisms and gene-gene interactions within the ACEi pathway affect the antihypertensive responses to enalapril.This article is protected by copyright. All rights reserved.
      PubDate: 2016-10-01T09:45:36.957079-05:
      DOI: 10.1111/bcpt.12682
  • Clinical Pharmacology in Denmark in 2016 – 40 Years with the Danish
           Society of Clinical Pharmacology and 20 Years as a Medical Speciality
    • Authors: Kim Brøsen; Stig Ejdrup Andersen, Jeanett Borregaard, Hanne Rolighed Christensen, Palle Mark Christensen, Kim Peder Dalhoff, Per Damkier, Jesper Hallas, Jens Heisterberg, Niels Jessen, Gesche Jürgens, Jens Peter Konnerup Kampmann, Britt Elmedal Laursen, Torben Laursen, Lars Peter Nielsen, Birgitte Klindt Poulsen, Henrik Enghusen Poulsen, Ljubica Vukelic Andersen, Thomas Senderovitz, Jesper Sonne
      Abstract: The Danish Society of Clinical Pharmacology was founded in 1976, and mainly thanks to the persistent efforts of the Society, clinical pharmacology became an independent medical speciality in Denmark in 1996. Since then, clinical pharmacology has gone from strength to strength. In the Danish health care system, clinical pharmacology has established itself as an indispensible part of the efforts to promote the rational, safe and economic use of drugs. Clinical pharmacologists are active in drug committees in both hospitals and in the primary sector. All clinical pharmacology centres offer a local medicines information service. Some centres have established an adverse drug effect manager function. Only one centre offers a therapeutics drug monitoring service. Clinical pharmacologists are responsible for the toxicological advice at the Danish Poison Information Centre at Bispebjerg University Hospital in the Capital Region. The Department of Clinical Pharmacology at Aarhus University Hospital work closely together with forensic toxicologists and pathologists, covering issues regarding illicit substances, forensic pharmacology, postmortem toxicology, expert testimony and research. Therapeutic geriatric and psychiatric teach-inns for specialist and junior doctors are among the newest initiatives organized by clinical pharmacologists. Clinical pharmacologists work also in the Danish Medicines Agency and in the Danish pharmaceutical industry, and the latter has in particular a great growth potential for creating new jobs and career opportunities for clinical pharmacologists. As of July 2016, the Danish Society of Clinical Pharmacology has 175 members, and 70 of these are specialists in clinical pharmacology corresponding to approximately 2.5 specialists per 1,000 doctors (Denmark has in total 28,000 doctors) or approximately 12 specialists per one million inhabitants.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-29T08:20:59.232134-05:
      DOI: 10.1111/bcpt.12681
  • A Novel Model of P‐Glycoprotein Inhibitor Screening Using Human
           Small Intestinal Organoids
    • Authors: Junfang Zhao; Zhiyang Zeng, Jialiang Sun, Yuanjin Zhang, Dali Li, Xueli Zhang, Mingyao Liu, Xin Wang
      Abstract: P‐glycoprotein (P‐gp), an important efflux transporter in intestine, regulates the bioavailability of orally taken drugs. To develop an in vitro model that preferably mimics the physiological microenvironment of human intestine, we employed the three‐dimensionally (3D) cultured organoids from human normal small intestinal epithelium. It was observed that the intestinal crypts could efficiently form cystic organoid structure with the extension of culture time. Furthermore, the physiological express of ABCB1 was detected at both mRNA and protein levels in cultured organoids. Rhodamine 123 (Rh123), a typical substrate of P‐gp, was actively transported across 3D organoids and accumulated in the luminal space. This transport process was also inhibited by verapamil and mitotane. In summary, the above‐mentioned model based on human small intestinal 3D organoids is suitable to imitate the small intestinal epithelium and could be used as a novel in vitro model especially for P‐gp inhibitor screening.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-22T12:30:20.12345-05:0
      DOI: 10.1111/bcpt.12680
  • The Effects of L‐carnitine against Cyclophosphamide‐induced
           Injuries in Mouse Testis
    • Authors: Yuanchao Cao; Xinsheng Wang, Shenqian Li, Hongqiang Wang, Lei Yu, Peitao Wang
      Abstract: In order to explore the possibility of L‐carnitine (LC) as a protector of male fertility in chemotherapy, we observed the damage of cyclophosphamide (CTX) to Sertoli cells and the protective effect of LC on the testis Sertoli cells from such damage in this study. Healthy adult male mice were divided into three groups. Chemotherapy group were injected intraperitoneally with the CTX; Protective agent group were injected both LC and CTX; Control group mice were injected only with isochoric physiological saline; all once a day for 5 days. After 5 days, the mice were respectively killed at 24 hr after the last injection. The testis and epididymis were removed. Epididymis was for sperm analysis immediately, and immunohistochemistry, RT‐PCR and Western blot for the assessments of occludin, GDNF and TGF‐β3 mRNA and protein expression. The sperm analysis of epididymis showed that CTX can significantly decrease sperm count and motility; and administration of LC resulted in significant recovery of the sperm count and sperm motility. Compared with control group, the expressions of occludin and GDNF decreased and the expression of TGF‐β3 increased significantly (P
      PubDate: 2016-09-21T02:55:46.434466-05:
      DOI: 10.1111/bcpt.12679
  • Anabolic Effect of Insulin Therapy on the Bone: Osteoprotegerin and
           Osteocalcin Up‐Regulation in Streptozotocin‐Induced Diabetic Rats
    • Authors: Raul Hernandes Bortolin; Francisco Paulo Freire Neto, Carlos Alberto Arcaro Filho, João Felipe Bezerra, Flávio Santos da Silva, Marcela Abott Galvão Ururahy, Karla Simone da Costa Souza, Valeria Morgiana Gualberto Duarte Moreira Lima, André Ducati Luchessi, Francisco Pignataro Lima, Marcus Vinicius Lia Fook, Bartolomeu Jorge da Silva, Maria das Graças Almeida, Bento João Abreu, Luciana Augusto Rezende, Adriana Augusto Rezende
      Abstract: Type 1 diabetes mellitus (T1DM) is associated with several skeletal alterations, particularly in conditions of poor glycaemic control. Insulin therapy is the major conservative treatment for T1DM; however, the effects of this hormone on bone markers of T1DM rats are limited, and the regulatory mechanisms remain elusive. Therefore, the evaluation of molecular and non‐molecular parameters in a chronic animal model of T1DM‐induced bone loss, treated with and without insulin, may help in elucidating insulin mechanisms. Male Wistar rats were assigned into three groups: control, T1DM (T1DM rats induced with streptozotocin [STZ] at 40 mg/kg intravenously) and T1DM plus insulin therapy (T1DMI). After eight weeks, we evaluated serum biochemistry, tibia histomorphometric and biomechanical parameters, as well as the gene expression of the receptor activator of nuclear factor kappa‐B ligand (RANKL), osteoprotegerin (OPG), and osteocalcin (OC) of femur mRNA. Compared with T1DM, the T1DMI group showed less bone loss, which was revealed by the increased trabecular width (TbWi, p < 0.001) and trabecular bone area (BAr, p < 0.01), reduced trabecular separation (TbSp, p < 0.01), and increased Young's modulus (p < 0.05). Moreover, molecular analyses indicated that the expression of OPG and OC was up‐regulated (p < 0.001 and p < 0.05, respectively). In summary, the up‐regulation of OPG and OC in the T1DMI group supports an anabolic effect of insulin, which was evidenced by the maintenance of bone architecture and flexibility. These results suggest that insulin therapy may prevent T1DM‐induced bone loss via effects on bone formation.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-21T02:48:18.308334-05:
      DOI: 10.1111/bcpt.12672
  • Students and Doctors are Unaware of the Cost of Drugs they frequently
    • Authors: Tim Schutte; Jelle Tichelaar, Prabath Nanayakkara, Milan Richir, Michiel Agtmael
      Abstract: Given the increasing healthcare costs of an ageing population, there is growing interest in rational prescribing, which takes costs of medication into account. We aimed to gain insight into the attitude to and knowledge of medication costs of medical students and doctors in daily practice.This was a cross‐sectional electronic survey among medical students (bachelor/master) and doctors (consultants/registrars). Attitude to costs was evaluated using a cost‐consciousness scale. In open questions, the participants estimated the cost of commonly prescribed (generic/non‐generic) drugs (including separate pharmacy dispensing costs). They were asked where they could find information about drug costs.Overall, a reasonable cost‐consciousness was found. Students were less conscious of the cost than were doctors (15.56 SD 3.25 versus 17.81 SD 2.25; scale 0–24; p=0.001). In contrast to this consciousness, actual estimated drug costs were within a 25% margin for only 5.4% of generic and 13.7% of proprietary drugs (Wilcoxon signed‐ranks, p
      PubDate: 2016-09-17T09:30:57.461966-05:
      DOI: 10.1111/bcpt.12678
  • Quantitative Assessment of Food Effect on the Pharmacokinetics of
           Nano‐Crystallized Megestrol Acetate
    • Authors: Jinju Guk; Hankil Son, Dong Woo Chae, Kyungsoo Park
      Abstract: Megestrol acetate, an appetite stimulant with low bioavailability, shows increased bioavailability when taken together with food. However, the pharmacokinetic characteristics of megestrol acetate and its relation with food are not well understood. This study aimed to investigate the food effect on the pharmacokinetics (PK) of the recently developed nano‐crystallized megestrol acetate (NCMA), using a model‐based approach.Data were obtained from an NCMA PK study consisting of a single dose in fasting (39 individuals) and fed conditions (40 individuals). Plasma concentrations were measured up to 120 hr post‐dose. With the incorporation of body weight via allometry, NONMEM 7.3 was used to develop a PK model, which was then used to simulate an optimal fasting dose yielding an AUC (area under concentration) and Cmax (maximum concentration) of NCMA close to those obtained with the fed dose.NCMA concentrations were best characterized by a two‐compartment model with first‐order absorption linked to a recycling compartment to account for the multiple concentration peaks observed. Food increased bioavailability 2.2‐fold, and decreased the absorption rate constant 0.58‐fold. Recycling event times were estimated to be 3.56, 7.99 and 24.0 hr. The optimal fast dose was 2.0 times higher than the fed dose, and the resulting difference in drug exposure between the fasting and fed dose was 7.5%.This work suggests that the PK model developed can be applied to an optimal dosage regimen design for NCMA treatment.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-17T09:30:56.522231-05:
      DOI: 10.1111/bcpt.12677
  • Proliferative Properties of 17β‐aminoestrogens in MCF‐7
           Human Breast Cancer Cells
    • Authors: Cristina Lemini; María Estela Avila, Martha Medina, Carlos Sánchez, Alejandra Figueroa, Juana García‐Mondragón, Arsenio Vargas‐Vázquez, Alejandro Jiménez‐Orozco
      Abstract: The 17β‐aminoestrogens (AEs) prolame, butolame and pentolame are weakly oestrogenic in rodents and display anticoagulant properties in contrast to oestradiol (E2) which presents procoagulant effects, potentially thrombogenic. They possess anti‐anxiety and anti‐depressive properties, being good candidates for menopausal hormone therapy. Their capability to induce proliferation of MCF‐7 human breast cancer cells, which proliferative rate depends on oestrogens, has not been explored; thus, the aim of this work was to characterize it. AEs proliferation properties were evaluated compared with E2 in MCF‐7 carcinoma cell‐line cultures using established methods. Receptor mediation on cell proliferation was studied by co‐incubating them with the oestrogen receptor antagonists tamoxifen, ICI 182,780 and the selective antagonists MPP (ERα) and PHTPP (ERβ). E2 and AEs increased MCF‐7 cell proliferation; their proliferative effect was between 1.5‐2 and E2 = 3.6 compared to controls (0); their relative proliferative effect was 18‐38% (E2 = 100%) with a relative proliferative potency of 4.5–8.9 (E2 = 100). The ERα antagonist MPP inhibited the MCF‐7 cells proliferation induced by E2 and AEs; on the contrary, the ERβ antagonist PHTPP exacerbated the proliferative response, showing that the AEs proliferative activity was mainly ERα‐mediated and apparently controlled by ERβ. Preliminary cytometric DNA flow analysis showed that AEs’ cell cycle S‐phase‐inducer property was lower than E2 following the proliferative order: E2 > butolame > prolame > pentolame, indicating pentolame with the weakest proliferative properties and being the safest of this series as a candidate for MHT.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-16T20:30:49.938188-05:
      DOI: 10.1111/bcpt.12674
  • Use of a Target‐Mediated Drug Disposition Model to Predict the Human
           Pharmacokinetics and Target Occupancy of GC1118, an Anti‐Epidermal
           Growth Factor Receptor Antibody
    • Authors: Wan‐Su Park; Seunghoon Han, Jongtae Lee, Taegon Hong, Jonghwa Won, Yangmi Lim, Kyuhyun Lee, Han Yeul Byun, Dong‐Seok Yim
      Abstract: GC1118 is an anti‐epidermal growth factor receptor (EGFR) monoclonal antibody that is currently under clinical development. In this study, the pharmacokinetics (PK) of GC1118 were modelled in monkeys to predict human PK and receptor occupancy (RO) profiles. The serum concentrations of GC1118 and its comparator (cetuximab) were assessed in monkeys with a non‐compartmental analysis and a target‐mediated drug disposition (TMDD) model following intravenous infusion (3–25 mg/kg) of these drugs. The scaling exponent of the EGFR synthesis rate was determined using a sensitivity analysis. The human cetuximab exposures were simulated by applying different exponents (0.7–1.0) for the EGFR synthesis rate in the allometric monkey PK model. Simulated Cmax and area under the curve values therein were compared with those previously reported in the literature to find the best exponent for the EGFR synthesis rate in human beings. The TMDD model appropriately described the monkey PK profile, which showed a decrease in clearance (CL; 1.2–0.4 mL/hr/kg) as the dose increased. The exponents for CL (0.75) and volume of distribution (Vd; 1.0) were used for the allometric scaling to predict human PK. The allometric coefficient for the EGFR synthesis rate chosen by the sensitivity analysis was 0.85 and the RO profiles that could not be measured experimentally were estimated based on the predicted concentrations of the total target and the drug‐target complex. Our monkey TMDD model successfully predicts human PK and RO profiles of GC1118 and can be used to determine the appropriate dose for a first‐in‐human study investigating this drug.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-16T20:30:44.378653-05:
      DOI: 10.1111/bcpt.12675
  • Penicillin G Treatment in Infective Endocarditis Patients – Does
           Standard Dosing Result in Therapeutic Plasma Concentrations'
    • Authors: Kristina Öbrink‐Hansen; Henrik Wiggers, Bo Martin Bibby, Tore Forsingdal Hardlei, Kaare Jensen, Marianne Kragh Thomsen, Birgitte Brock, Eskild Petersen
      Abstract: Penicillin G is frequently used to treat infective endocarditis (IE) caused by streptococci, penicillin‐susceptible staphylococci and enterococci. Appropriate antibiotic exposure is essential for survival and reduces the risk of complications and drug resistance development. We determined Penicillin G plasma concentrations [p‐penicillin] once weekly in 46 IE patients. The aim was to evaluate if Penicillin G 3g every 6 hr (q6h) resulted in therapeutic concentrations and to analyse potential factors that influence inter‐ and intra‐individual variability, using linear regression and a random coefficient model. [P‐penicillin] at 3 hr and at 6 hr was compared with the minimal inhibitory concentration (MIC) of the bacteria isolated from blood cultures to evaluate the following PK/PD targets: 50% fT>MIC and 100% fT>MIC.[P‐penicillin] varied notably between patients and was associated with age, weight, p‐creatinine and estimated creatinine clearance (eCLcr). Additionally, an increase in [p‐penicillin] during the treatment period showed strong correlation with age, a low eCLcr, a low weight and a low p‐albumin. Of the 46 patients, 96% had [p‐penicillin] that resulted in 50% fT>MIC, while 71% had [p‐penicillin] resulting in 100% fT>MIC. The majority of patients not achieving the 100% fT>MIC target were infected with enterococci. Streptococci and staphylococci isolated from blood cultures were highly susceptible to Penicillin G.Our results suggest that Penicillin G 3g q6h is suitable to treat IE caused by streptococci and penicillin‐susceptible staphylococci, but caution must be taken when the infection is caused by enterococci. When treating enterococci, therapeutic drug monitoring should be applied to optimize Penicillin G dosing and exposure.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-16T03:01:07.698435-05:
      DOI: 10.1111/bcpt.12661
  • Hepatocyte Concentrations of Indocyanin Green (ICG) Reflects Transfer
           Rates Across Membrane Transporters
    • Authors: Fabien Cusin; Liliana Fernandes Azevedo, Pierre Bonnaventure, Jules Desmeules, Youssef Daali, Catherine M. Pastor
      Abstract: Peroperative imaging with indocyanin green (ICG) is developing to increase safety in dissecting anatomical structures during hepatobiliary surgery. Images obtained with the fluorescence camera rely on concentrations measured in liver regions of interest. However, how ICG sinusoidal uptake and hepatocyte elimination rates generate ICG hepatocyte concentrations is largely unknown. To investigate such issue and better understand the role of membrane transporters in generating ICG hepatocyte concentrations, we perfused ICG in livers isolated from normal livers. Whether the well‐known transporter inhibitor rifampicin modifies hepatocyte ICG concentrations was also studied. The dye has a very high and constant extraction ratio (96%) into hepatocytes. This persistent high extraction ratio generates a huge uphill concentration gradient across the sinusoidal membrane: from 5 μM (sinusoids) to 1600 μM (liver). When inside hepatocytes, ICG has low hepatocyte elimination (7 nmol/min) and liver concentrations do not decrease much over time. Moreover, the tiny hepatocyte ICG efflux is mainly due to ICG return back to sinusoids (90%). Rifampicin slightly inhibits ICG uptake into hepatocytes and when inside hepatocytes blocks ICG efflux into bile canaliculi. In contrast, it increases ICG efflux back to sinusoids with significant decrease in ICG liver concentrations. Imaging with ICG in the peroperative period reflects the high hepatocyte concentrations and relies on the high extraction ratio across hepatocyte sinusoidal membrane. Although ICG concentrations are low in bile ducts, they are adequate for a good visualisation and avoid bile duct injury.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-14T03:55:35.805593-05:
      DOI: 10.1111/bcpt.12671
  • Effects of Di‐Isononyl Phthalate on Neuropeptide Y Expression in
           Differentiating Human Neuronal Cells
    • Authors: Filip Rendel; Christina Fjæraa Alfredsson, Carl‐Gustaf Bornehag, Birgitta E Sundström, Eewa Nånberg
      Abstract: Neuropeptide Y (NPY) is an abundant neuropeptide in the mammalian brain important for behavioural consequences of stress and energy metabolism. We have addressed possible effects of the phthalate DiNP on NPY expression in human SH‐SY5Y cells, a neuronal in vitro differentiation model. Pico‐ to nanomolar doses of DiNP and its metabolite MiNP resulted in decreased NPY mRNA and peptide expression in retinoid‐differentiated cells. Thus, dys‐regulated NPY may be an adverse outcome for exposure to low doses of DiNP in human beings.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-13T23:51:01.438499-05:
      DOI: 10.1111/bcpt.12670
  • Neuroprotective Effects of Sulfated Agaran from Marine Alga Gracilaria
           cornea in Rat 6‐hydroxydopamine Parkinson's Disease Model: Behavioural,
           Neurochemical and Transcriptional Alterations
    • Authors: Ricardo Basto Souza; Annyta Fernandes Frota, Rayane Siqueira Sousa, Nayara Araújo Cezario, Tarcizio Brito Santos, Luziana Mara Frota Souza, Chistiane Oliveira Coura, Valdécio Silvano Monteiro, Gerardo Cristino Filho, Silvânia Maria Mendes Vasconcelos, Rodrigo Maranguape Silva da Cunha, Lissiana Magna Vasconcelos Aguiar, Norma Maria Barros Benevides
      Abstract: Parkinson's disease (PD) is a multifactorial disease associated with the degeneration of dopaminergic neurons and behavioural alterations. Natural bioactive compounds may provide new therapeutic alternatives for neurodegenerative disorders, such as PD. The sulfated polysaccharides isolated from marine algae are heterogenic molecules that show different biological activities. The red marine alga Gracilaria cornea has a sulfated polysaccharide (SA‐Gc) with structure and anti‐inflammatory and anti‐nociceptive activities reported in the literature. Therefore, this study aimed to evaluate the neuroprotective effects of SA‐Gc in rat model PD induced by 6‐hydroxydopamine (6‐OHDA). Firstly, we established the PD model in rats, induced by an intrastriatal injection (int.) of 6‐OHDA, followed by a single administration of SA‐Gc (15, 30 or 60 μg; int.). On the 14th day, behavioural tests were performed. After euthanasia, brain areas were dissected and used for neurochemical and/or transcriptional analyses. The results showed that SA‐Gc (60 μg, int.) promoted neuroprotective effects in vivo through reducing the oxidative/nitroactive stress and through alterations in the monoamine contents induced by 6‐OHDA. Furthermore, SA‐Gc modulated the transcription of neuroprotective and inflammatory genes, as well as returning behavioural activities and weight gain to normal conditions. Thus, the present study reports the neuroprotective effects of SA‐Gc against 6‐OHDA in rats.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-09T10:41:33.964784-05:
      DOI: 10.1111/bcpt.12669
  • Comparison of Pharmacokinetics and Tissue Distribution Kinetics of
           Roxithromycin and Expression of CYP 3A1 between Pregnant Mice and Foetuses
    • Authors: Yi Qin; Weizhe Xu, Lanjian Mo, Xiaorong Li, Beikang Ge, Jie Xiong, Lifang Gao, Pinxiang Xu, Ming Xue
      Abstract: The macrolide antibiotic, roxithromycin, is recommended for treating mycoplasma infection and has the potential to be administered to pregnant women who are susceptible to the infection. The current study compared the pharmacokinetic properties and tissue distribution of roxithromycin among pregnant mice and their foetuses. We also determined the level of CYP3A1, a major enzyme for roxithromycin metabolism, in liver microsomes and investigated the placental transport properties of roxithromycin. Biosamples were collected from female mice at gestational day 17 following a single intragastric administration of roxithromycin. A sensitive and specific lipid chromatography‐tandem mass spectroscopy method was developed to detect the drug concentration and to obtain kinetic data. The level of CYP3A1 was significantly lower in foetal liver compared with that in maternal liver according to western blot data, suggesting a decreased metabolism and prolonged half‐life of roxithromycin in the foetus. The tissue distributions of roxithromycin were similar between mother and foetus, indicating that the placental barrier did not block the transport of roxithromycin from mother to foetus. The current findings are consistent with the clinical efficacy of roxithromycin in both pregnant mothers and foetuses. Based on this study, it is feasible and reasonable to predict the transport properties of other lipophilic drugs during pregnancy.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-09T10:17:05.477677-05:
      DOI: 10.1111/bcpt.12668
  • Effects of Genetic Polymorphisms of Cytochrome P450 Enzymes and MDR1
           Transporter on Pantoprazole Metabolism and Helicobacter pylori Eradication
    • Authors: R O Karaca; S Kalkisim, A Altinbas, S Kilincalp, I Yuksel, M T Goktas, U Yasar, A Bozkurt, M O Babaoglu
      Abstract: Pantoprazole is a proton pump inhibitor that is commonly used in the treatment of peptic ulcer disease (PUD) and metabolized by cytochrome P450 (CYP) enzymes CYP2C19 and CYP3A4. Pantoprazole is a substrate for multidrug resistance protein 1 (MDR1). Single nucleotide polymorphisms (SNPs) in CYP2C19, CYP3A4 and MDR1 affect enzyme activity or gene expression of proteins and may alter plasma pantoprazole concentrations and treatment success in PUD. In this study, we aimed to investigate the association between genetic polymorphisms in CYP2C19, CYP3A4 and MDR1 and pharmacokinetics of pantoprazole and therapeutic outcomes in patients with either Helicobacter pylori associated [H.P.(+)]‐PUD or [H.P.(+)]‐gastritis. The plasma pantoprazole concentrations were determined by using an HPLC method at the third hour after a 40‐mg tablet of pantoprazole administration in 194 newly diagnosed patients with either [H.P.(+)]‐PUD or [H.P.(+)]‐gastritis. Genotyping was performed by using PCR‐RFLP and DNA sequencing. Among patients appearing for follow‐up examination (n=105), the eradication rate for H. pylori was 82.8% (n=87). The median pantoprazole plasma concentrations in poor metabolisers (PM), rapid metabolisers (RM) and ultra‐rapid metabolisers (URM) were 2.07; 1.69; 1.28 μg/ml, respectively (p=0.04). CYP3A4*1G and *22 polymorphisms did not affect plasma pantoprazole concentrations and H. pylori eradication rate. The MDR1 genetic polymorphisms did not affect plasma pantoprazole concentrations. MDR1 3435CC‐2677GG‐1236CC haplotype carriers had lower H. pylori eradication rate (60%) than the remaining subjects (84.9%) while the difference was not statistically significant (p=0.07).In conclusion, while CYP2C19 genetic polymorphisms significantly affected plasma pantoprazole concentrations, polymorphisms of CYP2C19, CYP3A4 and MDR1 did not affect H. pylori eradication rates.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-09T02:33:50.634897-05:
      DOI: 10.1111/bcpt.12667
  • Investigating Prevalence and Pattern of Long‐Term Cardiovascular
           Disorders in Sulfur Mustard‐exposed Victims and Determining Proper
           Biomarkers for Early Defining, Monitoring and Analysis of Patients’
           Feedback on Therapy
    • Authors: Behrad Darvishi; Yunes Panahi, Mostafa Ghanei, Leila Farahmand
      Abstract: Among the most readily existing chemical warfare agents, sulfur mustard (SM), also known as Mustard Gas, is the most commonly used agent owing to its ease of synthesis and stockpiling. Unprotected exposure mostly results in debilitation rather than lethal injuries, leaving an exposed victim incapacitated for days to even months. Although acute toxicity of sulfur mustard has been fairly established, the long‐term post‐exposure effects either chronic or short‐term but significant are still evolving. 30,000 Iranian victims of the Iran‐Iraq imposed war, have now – after 30 years ‐ formed the key population demonstrating long‐term effects from sulfur mustard exposure. Recent studies have shown that the prevalence of several long‐term cardiovascular disorders (CVDs) has significantly increased among SM‐exposed victims including Coronary Artery Disorders (CAD), Coronary Artery Ectasia (CAE), Congestive Heart Failure (CHF), myocardium abnormalities and so on. The more important point is the lack of a determinant biomarker for early screening, recognizing, treating, monitoring and estimating exposed victims’ response to applied therapy. Additionally, unidentified risk factors significantly decrease the chance of a successful therapy and result in undesired failure of a comprehensive therapeutic strategy. In this MiniReview, we examined the literature in detail to evaluate relevant reports considering long‐term cardiovascular complications of SM, detecting possible risk factors and determining possible preventing events.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-08T09:45:23.035-05:00
      DOI: 10.1111/bcpt.12666
  • Foetal Fentanyl Exposure and Ion Trapping after Intravenous and
           Transdermal Administration to the Ewe
    • Authors: Emma M Heikkinen; Kokki Hannu, Heikkinen Aki, Ranta Veli‐Pekka, Räsänen Juha, Voipio Hanna‐Marja, Kokki Merja
      Abstract: Opioids given to pregnant and parturient women are relatively freely transferred across the placenta. Spinal, epidural and intravenous fentanyl have been studied in pregnant women and neonates, but foetal safety of fentanyl dosing with transdermal patch during pregnancy and labour is not sufficiently studied. Foetal pH is physiologically lower than maternal pH, and thus, opioids, that are weak bases, are ionized and may cumulate to foetus. Foetal asphyxia may further worsen acidosis and ion trapping induced by low pH is assumed to increase the foetal exposure to opioids. Here, we show that no correlation between foetal acidosis and ion trapping of fentanyl could be found. In three experiments, 29 pregnant sheep were administered fentanyl with 2 μg/kg/h patch supplemented with IV‐boluses/infusion. Foetal exposure to fentanyl was extensive, median 0.34 ng/ml (quartiles 0.21, 0.42), yet drug accumulation to foetus was not observed, median of foetal‐maternal concentration (F/M) ‐ratio was 0.63 (0.43, 0.75) during the first hours after fentanyl administration. Low foetal pH and pH difference between ewe and the foetus did not correlate with fentanyl concentration in the foetus or F/M‐ratio. At steady state during the second patch worn foetal plasma fentanyl was low, 0.13 ng/ml, and the median of F/M‐ratio was 0.69. Our results demonstrate that drug accumulation to foetus caused by ion trapping seen with some weak base opioids may not be that significant with fentanyl. These results have a clinical relevance when fentanyl is dosed to pregnant woman and the foetus is acidemic.This article is protected by copyright. All rights reserved.
      PubDate: 2016-09-08T09:25:20.699523-05:
      DOI: 10.1111/bcpt.12665
  • Anti‐Inflammatory Effect of Erythropoietin in the TNBS‐induced
    • Authors: Vanessa Mateus; João Rocha, Paula Alves, Hélder Mota‐Filipe, Bruno Sepodes, Rui Manuel Amaro Pinto
      Abstract: Erythropoietin is a potent stimulator of erythroid progenitor cells, which is able to inhibit NF‐kB activation, due to its pleiotropic properties, thus promoting an anti‐inflammatory effect. Since inflammatory bowel disease is a chronic disease with reduced quality of life, and the current pharmacotherapy only induces or maintains the patient in remission, there is a crucial need of new pharmacological approaches. The main objective of this study was to evaluate the effect of erythropoietin in the TNBS‐induced colitis model in mice with a normal intestinal flora. Mice with TNBS‐induced colitis were treated with a daily dose of erythropoietin at 500 IU/kg bw/day and 1000 IU/Kg bw/day IP during 4 days. As to clinical symptoms/signs, erythropoietin attenuated the decreased body weight and reduced diarrhoea and edema of the anus registered in the non‐treated mice group in a dose‐dependent manner. The anti‐inflammatory properties of erythropoietin in the TNBS‐induced colitis were confirmed by suppression of pro‐inflammatory mediators, such as TNF‐α, IL‐1β and MPO, as well as a significant increase of the anti‐inflammatory cytokine, IL‐10, was promoted. These treated mice also presented a reduction of hemoglobin fecal and ALP, suggesting a beneficial effect of erythropoietin in the hemorrhagic focus and destruction of the enterocyte associated to the colon injury induced by TNBS, respectively. The histopathological score was reduced after treatment with erythropoietin, decreasing the severity and extension of the colitis. Furthermore, renal and hepatic biomarkers, as well as hematocrit concentration remained stabilized after treatment. In conclusion, erythropoietin reduces the inflammatory response associated with TNBS‐induced colitis in mice.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-31T09:50:33.834155-05:
      DOI: 10.1111/bcpt.12663
  • Treatment Changes among Users of Non‐Vitamin K Antagonist Oral
           Anticoagulants in Atrial Fibrillation
    • Authors: Maja Hellfritzsch; Steen Elkjær Husted, Erik Lerkevang Grove, Lotte Rasmussen, Birgitte Klindt Poulsen, Søren Paaske Johnsen, Jesper Hallas, Anton Pottegård
      Abstract: Patients with atrial fibrillation discontinuing anticoagulant therapy are left unprotected against ischaemic stroke. Further, switching between oral anticoagulants may be associated with a transiently increased risk of bleeding or thromboembolism. However, there is a paucity of real‐life data on pattern of switching and discontinuation of oral anticoagulants. To address this, we conducted a nationwide drug utilization study including all registered Danish atrial fibrillation patients initiating a non‐VKA oral anticoagulant (NOAC) between August 2011 and February 2016. We assessed changes in anticoagulant treatment, including switching between oral anticoagulants as well as discontinuation of NOACs, and explored patient characteristics predicting these changes.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-31T09:50:31.68339-05:0
      DOI: 10.1111/bcpt.12664
  • Oesophageal Obstruction from a Pharmacobezoar resulting in Death
    • Authors: Katrine E. Mortensen
      Abstract: Formation of an intestinal pharmacobezoar is a rare condition. It may form after intake of various oral pharmaceutical preparations of drugs, both as a result of an acute overdose and through chronic use of therapeutic doses of a drug. We report a case with a patient presenting with an oesophageal pharmacobezoar and complete obstruction of the oesophagus and severe toxic symptoms and death related to oral ingestion of multiple drugs.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-27T02:20:20.895915-05:
      DOI: 10.1111/bcpt.12662
  • Pharmacological Value of Murine delayed‐type Hypersensitivity Arthritis;
           A Robust Mouse Model of Rheumatoid Arthritis in C57BL/6 Mice
    • Authors: Sara Marie Atkinson; Anneline Nansen
      Abstract: In this MiniReview, we summarise the body of knowledge on the delayed‐type hypersensitivity arthritis (DTHA) model, a recently developed arthritis model with 100% incidence, low variation and synchronised onset in C57BL/6 (B6) mice, and compare it to other murine arthritis models. It is desirable to have robust arthritis models in B6 mice, as many transgene strains are bred on this background. However, several of the most widely used mouse model of arthritis cannot be induced in B6 mice without the drawback of lower incidence, reduced severity and higher variation, if at all. DTHA is induced by modifying a classical methylated bovine serum albumin (mBSA)‐induced DTH response by administering a cocktail of anti‐type II collagen antibodies (anti‐CII) between immunisation and challenge. Arthritis affects one, pre‐defined paw in which acute inflammation and severe arthritis rapidly develops and peaks after 4‐7 days. Disease is self‐resolving over the course of around 3 weeks. Disease manifestations resemble those seen in other arthritis models and include bone erosion, cartilage destruction, oedema, pannus and new bone formation. Induction of DTHA is dependent on CD4+ T cells while B cells are dispensable. The DTHA model is set apart from other murine arthritis models in that it can be induced in B6 mice with 100% incidence and with high and consistent severity. This is the clearest advantage of the model, as the mechanisms of disease and clinical manifestations can be found in other arthritis models. The model holds potential for future modifications that may improve the lack of chronicity.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-24T06:36:40.226255-05:
      DOI: 10.1111/bcpt.12657
  • Toxicity of Atorvastatin on Pancreas Mitochondria: A justification for
           increased risk of Diabetes Mellitus
    • Authors: Melina Sadighara; Zahra Amirsheardost, Mohsen Minaiyan, Valiollah Hajhashemi, Parvaneh Naserzadeh, Ahmad Salimi, Enayatollah Seydi, Jalal Pourahmad
      Abstract: Statins (including atorvastatin) are a widely used class of drugs, and like all medications, they have a potential for adverse effects. Recently, it has been shown that statins also exert side effects on the pancreas. In vitro studies have suggested that this class of drugs induced a reduction in insulin secretion. Also, the use of statins is associated with a raised risk of diabetes mellitus (DM), but the mechanisms underlying statin‐induced diabetes poorly known. Literature data indicate that several statins are able to induce apoptosis signalling. This study was designed to examine the mechanism of atorvastatin on mitochondria obtained from rat pancreas. In our study, mitochondria were obtained from the pancreas and then exposed to atorvastatin and vehicle to investigate probable toxic effects. The results showed that atorvastatin (25, 50, 75, 100 and 125 μM) increased reactive oxygen species (ROS) production, mitochondrial swelling, collapse of mitochondrial membrane potential (MMP) and cytochrome c release, the orchestrating factor for mitochondria‐mediated apoptosis signalling. Atorvastatin also reduced the ATP levels. These results propose that the toxicity of atorvastatin on pancreas mitochondria is a key point for drug‐induced apoptotic cell loss in the pancreas and therefore a justification for increased risk of diabetes mellitus.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-24T06:25:23.63624-05:0
      DOI: 10.1111/bcpt.12656
  • Antinociceptive and Anti‐Inflammatory Effects of Ketamine and the
           Relationship to its Antidepressant Action and GSK3 Inhibition
    • Authors: Eduardo Mulato Vale; Cecília Coelho Xavier, Brenda Gomes Nogueira, Bruna Caldas Campos, Pedro Everson Alexandre Aquino, Roberta Oliveira Costa, Luzia Kalyne Almeida Moreira Leal, Silvânia Maria Mendes Vasconcelos, Kelly Rose Tavares Neves, Glauce Socorro Barros Viana
      Abstract: Ketamine (KET), a NMDA antagonist, exerts an antidepressant effect at subanesthetic doses and possesses analgesic and anti‐inflammatory activities. We evaluated the involvement of KET antinociceptive and anti‐inflammatory effects with its antidepressant action. Male Swiss mice were subjected to formalin, carrageenan‐induced paw oedema and forced swimming tests, for assessing antinociceptive, anti‐inflammatory and antidepressant effects. The treatment groups were: control, KET (2, 5 and 10 mg/kg), lithium (LI: 5 mg/kg) and KET2+LI5 combination. Immunohistochemistry analyses (TNF‐alpha, iNOS, COX‐2 and GSK3) in oedematous paws were performed. KET5 and KET10 reduced licking times in neurogenic (22 and 38%) and inflammatory (67 and 78%) phases of the formalin test, respectively, as related to controls. While LI5 inhibited the 2nd phase by 24%, the licking time was inhibited by 26 and 59% in the KET2+LI5 group (1st and 2nd phases). Furthermore, oedema volumes were reduced by 37 and 45% in the KET5 and KET10 groups, respectively. Oedema reductions were 29% in the LI5 group and 48% in the KET2+LI5 group. In the forced swimming test, there were 23, 38 and 53% decreases of the immobility time in KET2, KET5 and KET10 groups, respectively. While LI5 caused no significant effect, decreases of 52% were observed with KET2+LI5. KET also decreased TNF‐alpha, iNOS, COX‐2 and GSK3 immunostainings in oedematous paws, effects intensified with KET2+LI5. We showed that KET presents antinociceptive and anti‐inflammatory effects associated to its antidepressant response. Furthermore, our results indicate the close involvement of GSK3 inhibition and blockade of inflammatory responses, in the antidepressant drug effect.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-23T21:05:46.942553-05:
      DOI: 10.1111/bcpt.12637
  • Prognostic Factors in Emergency Department Patients with
           Glyphosate‐Surfactant Intoxication: Point‐of‐Care Lactate Testing
    • Authors: Yong Hwan Kim; Jun Ho Lee, Kwang Won Cho, Dong Woo Lee, Mun Ju Kang, Kyoung Yul Lee, Young Hwan Lee, Seong Youn Hwang, Na Kyoung Lee
      Abstract: An increasing number of suicide attempts involve the ingestion of glyphosate surfactant; hence, clinical toxicologists may encounter severe cases of glyphosate‐surfactant intoxication. In several other clinical conditions, serum lactate is used to predict outcome. We investigated the relationship between lactate levels and 30‐day mortality from glyphosate‐surfactant poisoning.This retrospective analysis involved 232 patients who were admitted to the emergency department after acute glyphosate‐surfactant poisoning between January 2004 and June 2014. We used a receiver operating characteristic (ROC) curve to define the optimal cut‐off point for lactate levels. A Kaplan‐Meier 30‐day survival curve was then analysed in terms of the defined cut‐off level. We used multivariate Cox proportional hazards regression analysis to determine the risk factors for 30‐day mortality.Of the 232 patients, 29 died, yielding a case fatality rate of 12.5%. Lactate was significantly higher in non‐survivors (6.5±3.1 mmol/L) than in survivors (3.3±2.2 mmol/L; p 59 years, corrected QT interval > 495 ms and potassium > 5.5 mmol/L were independent risk factors for 30‐day mortality.Lactate is an independent predictor of 30‐day mortality in patients with glyphosate‐surfactant poisoning. Early measurement of lactate levels may be a simple and practical way to assess the severity of intoxication.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-23T21:05:37.394025-05:
      DOI: 10.1111/bcpt.12624
  • The Pharmacology & Toxicology of the “Holy Trinity”
    • Authors: Joseph T. Horsfall; Jon E. Sprague
      Abstract: Combining opioids with benzodiazepines and skeletal muscle relaxants (“The Holy Trinity”) has been reported to potentiate the “high”. Through unique interactions with co‐localized μ‐opioid and GABAA receptors, the combined use of these agents induce a synergistic increase in dopamine in the nucleus accumbens (NAc) and depression of respiration. The inhibition of GABA release mediated by μ1‐opioid receptor activation results in a subsequent increase in dopamine in the NAc. Benzodiazepines activate the GABAAR to suppress respiration in the medullary respiratory centers. The skeletal muscle relaxant, carisoprodol appears to bind to a unique binding domain within the GABAAR to further enhance the respiratory depressant effects of the benzodiazepines. Therefore, the opioids, the benzodiazepines and carisoprodol alone or in combination are capable of inducing respiratory depression. Current guidelines for opioid prescribing recommend against the concomitant use of benzodiazepines but do not recognize the potential risk associated with the addition of skeletal muscle relaxants.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-23T02:55:39.586497-05:
      DOI: 10.1111/bcpt.12655
  • Direct Inhibitory Effects of Carbon Monoxide on Six Venoms Containing
           Fibrinogenolytic Metalloproteinases
    • Authors: Vance G. Nielsen; Philip A. Losada
      Abstract: Since the introduction of antivenom administration over a century ago to treat venomous snake bite, it has been the most effective therapy for saving life and limb. However, this treatment is not always effective and not without potential life‐threatening side effects. We tested a new paradigm to abrogate the plasmatic anticoagulant effects of fibrinogenolytic snake venom metalloproteinases by inhibiting these Zn+2‐dependent enzymes directly with carbon monoxide exposure. Assessment of the fibrinogenolytic effects of venoms collected from the Arizona Black rattlesnake, Northern Pacific rattlesnake, Western cottonmouth, Eastern cottonmouth, Broad‐banded copperhead and Southern copperhead on human plasmatic coagulation kinetics was performed with thrombelastography in vitro. Isolated exposure of all but one venom (Southern copperhead) to carbon monoxide significantly decreased the ability of the venoms to compromise coagulation. These results demonstrated that direct inhibition of transition metal containing venom enzymes by yet to be elucidated mechanisms (e.g., CO binding to Zn+2 or displacing Zn+2 from the catalytic site, CO binding to histidine residues) can in many instances significantly decrease fibrinogenolytic activity. This new paradigm of carbon monoxide‐based inhibition of the anticoagulant effects of snake venom metalloproteinases could potentially diminish hemostatic compromise in envenomed patients until antivenom can be administered.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-22T03:03:04.549312-05:
      DOI: 10.1111/bcpt.12654
  • Modulation of Dopaminergic Pathways to Treat Erectile Dysfunction
    • Authors: Ulf Simonsen; Simon Comerma‐Steffensen, Karl‐Erik Andersson
      Abstract: The currently recommended first‐line treatments of erectile dysfunction, phosphodiesterase type 5 inhibitors (PDE5i), e.g. sildenafil, are efficacious in many patients with erectile dysfunction of vascular origin, but this therapy is insufficient in approximately 30‐40% of men with erectile dysfunction where there is also a neuronal affection. There is a demand of novel approaches to treat the condition. We review the possibility of modulating the dopaminergic pathways to improve erectile function. Dopamine D1 (D1, D5)‐and D2 (D2‐D4)‐like receptors in the paraventricular area, the medial preoptic area, the spinal cord, and in the erectile tissue are involved in erection, and several agonists developed for treatment of Parkinson's disease are associated with increased libido. A therapeutic window for treatment of erectile dysfunction was found by sublingual administration of the general dopamine receptor agonist apomorphine, but it failed mainly due to less efficacy on erectile function compared to PDE5i. To avoid the dose‐limiting side effects mediated by D2 receptors, nausea and emesis, dopamine D4 receptor agonists were developed, and they induce erection in rodents, but these drugs were never introduced clinically. The β‐lactamase inhibitor clavulanic acid increases dopamine and serotonin and was found to increase sexual arousal and erections, but the dose‐response curve is bell‐shaped. Bupropion has selectivity for inhibition of the dopamine reuptake transporter and can be used to alleviate sexual symptoms caused by other antidepressant medication, hence providing an interesting approach to treat erectile dysfunction. In summary, modulation of the dopaminergic pathways provides a possibility to improve treatment of erectile dysfunction.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-19T10:10:38.090851-05:
      DOI: 10.1111/bcpt.12653
  • Prophylactic Melatonin Attenuates Isoflurane‐induced Cognitive
           Impairment in Aged Rats through Hippocampal Melatonin Receptor 2 ‐ CREB
    • Authors: Yajie Liu; Cheng Ni, Zhengqian Li, Ning Yang, Yang Zhou, Xiaoying Rong, Min Qian, Dehua Chui, Xiangyang Guo
      Abstract: Melatonin exerts many physiological effects via melatonin receptors, among which the melatonin‐2 receptor (MT2) plays a critical role in circadian rhythm disorders, Alzheimer's disease and other neurological disorders. A melatonin replacement strategy has been tested previously, and MT2 was a critical target during the process. cAMP response element‐binding (CREB) is an essential transcription factor for memory formation, and could be involved in MT2 signalling. Therefore, the present study was designed to investigate the effects of prophylactic melatonin on inhaled anaesthetic isoflurane‐induced cognitive impairment, and to determine whether the protective effects of melatonin are dependent on MT2 and downstream CREB signalling in the hippocampus of aged rats. The results showed that prophylactic melatonin attenuated isoflurane‐induced decreases in plasma / hippocampal melatonin levels and cognitive impairment in aged rats. Furthermore, 4P‐PDOT, a selective MT2 antagonist, blocked the protective effects of melatonin on isoflurane‐induced decreases in both hippocampal MT2 expression and downstream CREB phosphorylation. And 4P‐PDOT blocked the attenuation of melatonin on isoflurane‐induced memory impairment. Collectively, the results suggest that the protective effects of prophylactic melatonin are dependent on hippocampal MT2‐CREB signalling, which could be a potential therapeutic target for anaesthetic‐induced cognitive impairment.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-12T00:55:28.060444-05:
      DOI: 10.1111/bcpt.12652
  • Mechanisms of Action and Toxicity of the Mycotoxin Alternariol: A Review
    • Authors: Anita Solhaug; Gunnar S. Eriksen, Jørn A. Holme
      Abstract: The mycotoxin alternariol (AOH) is produced by Alternaria fungi. It occurs naturally in foodstuffs and is frequently found as contaminant in fruit and grain products. Most information regarding AOH toxicity and the potential mechanisms involved comes from in vitro studies, as only very limited in vivo studies have been performed. AOH forms reactive oxygen species (ROS) and interacts with DNA topoisomerase, thereby generating both single (SSB) and double strand DNA beaks (DSB). This triggers various DNA damage response pathways. AOH causes a marked reduction in proliferation in mammalian cells due to cell cycle arrest often in the G2/M‐phase. Following an additional inhibition of cytokinesis, cells with abnormal nuclei as well as polyploidy are reported. In macrophages, AOH may increase autophagic activity and induce senescence. Furthermore, AOH is found to change the morphology and phenotype of various human macrophage cell models. Studies so far indicate that the AOH‐induced effects are primarily a result of DSB via its effects on topoisomerase activity. Thus, most probably there will be a threshold for the AOH‐induced effects, typically seen in the 5‐10 μM range. These in vitro mechanistic studies further support the in vivo studies suggesting low acute toxicity. However, a decreased immune response to infections and/or a disturbed balance of the adaptive immune system when exposed together with other mycotoxins cannot be excluded. This hypothesis needs to be further explored with proper in vivo studies.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-10T03:26:58.986664-05:
      DOI: 10.1111/bcpt.12635
  • Apoptotic process induced by oxaliplatin in rat hippocampus causes memory
    • Authors: Enrica Bianchi; Lorenzo Di Cesare Mannelli, Laura Micheli, Mersedez Farzad, Margherita Aglianò, Carla Ghelardini
      Abstract: Aspects of memory involved in cognitive mechanisms were investigated in rat after oxaliplatin (OX) chemotherapy using animal behavioural assessment of passive avoidance and social learning paradigms, which are both hippocampus‐sensitive. Rodents, previously subjected to two‐week OX treatment, showed passive avoidance and social learning impairment and apoptotic processes in hippocampus. Apoptosis rate significantly increased in cultured hippocampal cells exposed to OX at increasing doses, and this effect was dose‐dependent. Ex vivo experiments showed that cell damage and apoptosis were blocked in hippocampus from OX rats co‐treated with copper sulfate (CS) which precludes OX transport inside the cell. In vivo, passive avoidance and social learning impairment could not be observed in OX rats co‐administered with CS. Thus, a site of action of OX treatment on memory impairment appears to be located at the hippocampus. These findings strongly support that cellular damage induced by OX in rodent hippocampus underlies the weakening of some memory functions.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-10T03:26:55.449099-05:
      DOI: 10.1111/bcpt.12629
  • The Role of the Mucosa in Normal and Abnormal Bladder Function
    • Authors: Christopher H. Fry; Bahareh Vahabi
      Abstract: The internal face of the detrusor smooth muscle wall of the urinary bladder is covered by a mucosa, separating muscle from the hostile environment of urine. However, the mucosa is more than a very low permeability structure and offers a sensory structure that monitors the extent of bladder filling and composition of the urine. The mucosa may be considered as a single functional structure and comprises a tight epithelial layer under which is a basement membrane and lamina propria. The latter region itself is a complex of afferent nerves, blood vessels, interstitial cells and in some species including human beings a muscularis mucosae. Stress on the bladder wall through physical or chemical stressors elicits release of chemicals, such as ATP, acetylcholine, prostaglandins and nitric oxide that modulate the activity of either afferent nerves or the muscular components of the bladder wall. The release and responses are graded so that the mucosa forms a dynamic sensory structure, and there is evidence that the gain of this system is increased in pathologies such as overactive bladder and bladder pain syndrome. This system therefore potentially provides a number of drug targets against these conditions, once a number of fundamental questions are answered. These include: how is mediator release regulated; what are the intermediate roles of interstitial cells that surround afferent nerves and blood vessels; and what is the mode of communication between urothelium and muscle – by diffusion of mediators or by cell‐to‐cell communication'This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-05T06:31:20.942456-05:
      DOI: 10.1111/bcpt.12626
  • Thermoresponsive polymers with LCST‐ or UCST‐type phase behaviour do
           not induce toxicity to human endothelial cells
    • Authors: Yuejia Ji; Mengxiang Zhu, Yu Gong, Haoyu Tang, Juan Li, Yi Cao
      Abstract: Thermoresponsive polymers have gained extensive attention as biomedical materials especially for targeted drug delivery systems. We have recently developed water‐soluble polypeptides based thermoresponsive polymers that exhibit lower critical solution temperature (LCST) or upper critical solution temperature (UCST) type phase behaviours. In this study, the toxicity of these polymers to human umbilical vein endothelial cells (HUVECs) was investigated to assess the safety and biocompatibility. Up to 100μg/ml thermoresponsive polymers did not induce cytotoxicity to HUVECs, showing as unaltered mitochondrial viability assessed as cell counting kit‐8 (CCK‐8) assay and membrane integrity assessed as lactate dehydrogenase (LDH) assay. Inflammatory response, assessed as the release of chemokines soluble monocyte chemotactic protein 1 (sMCP‐1) and interleukin‐8 (IL‐8) as well as cytokine IL‐6, was not significantly affected by the polymers. In addition, 1μM thapsigargin (TG), an endoplasmic reticulum (ER) stress inducer, significantly decreased mitochondrial viability, but did not affect membrane integrity or inflammatory response. The presence of thermoresponsive polymers with LCST‐ type phase behaviour did not further affect the effects of TG. In conclusion, the thermoresponsive polymers used in this study are not toxic to endothelial cells, and therefore could be further considered as safe materials for biomedical applications.This article is protected by copyright. All rights reserved.
      PubDate: 2016-08-05T06:31:04.893932-05:
      DOI: 10.1111/bcpt.12643
  • Curcumin Inhibits 5‐Fluorouracil‐induced Up‐regulation of CXCL1 and
           CXCL2 of the Colon Associated with Attenuation of Diarrhoea Development
    • Authors: Hiroyasu Sakai; Yuki Kai, Aya Oguchi, Minami Kimura, Shoko Tabata, Miyabi Yaegashi, Taiki Saito, Ken Sato, Fumiaki Sato, Tetsuro Yumoto, Minoru Narita
      Abstract: The compound 5‐fluorouracil (5‐FU) is used in cancer chemotherapy and is known to cause diarrhoea. We recently reported that chemokine (C‐X‐C motif) ligand 1 (CXCL1) and neutrophils in the colonic mucosa were markedly increased by the administration of 5‐FU in mice. Curcumin has anti‐inflammatory, anti‐tumourand antioxidant properties. Therefore, we examined the effect of curcumin on 5‐FU‐induced diarrhoea development and CXCL1 and CXCL2 up‐regulation in the colon. Mice were given 5‐FU (50 mg/kg, i.p.) daily for 4 days. Curcumin (100 or 300 mg/kg, p.o.) was administered on the day before the first administration of 5‐FU and administered 30 min. before the administration of 5‐FU. Gene expression levels of CXCL1 and CXCL2 in the colon were examined by real‐time RT‐PCR. Curcumin reduced the 5‐FU‐induced diarrhoea development. Under this condition, the CXCL1 and CXCL2 gene up‐regulated by 5‐FU administration was inhibited by curcumin. The gene expression of CXCL1 and CXCL2 was also enhanced by 5‐FU application in vitro. The 5‐FU‐induced up‐regulated CXCL1 and CXCL2 gene expressions were inhibited by curcumin, Bay‐117082 and bortezomib, nuclear factor kappa B (NF‐κB) inhibitors, C646, a p300/cyclic adenosine monophosphate response element‐binding protein–histone acetyltransferase (HAT) inhibitor. In conclusion, these finding suggested that curcumin prevented the development of diarrhoea by inhibiting NF‐κB and HAT activation.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-26T03:15:45.205943-05:
      DOI: 10.1111/bcpt.12619
  • Geraniol Induces Anti‐nociceptive Effect in Mice Evaluated in
           Behavioural and Electrophysiological Models
    • Authors: Viviana La Rocca; Diogo Vilar Fonsêca, Kerly Shamyra Silva‐Alves, Francisco Walber Ferreira‐da‐Silva, Damião Pergentino Sousa, Priscila Laise Santos, Lucindo José Quintans‐Júnior, José Henrique Leal‐Cardoso, Reinaldo Nóbrega Almeida
      Abstract: Geraniol (GER) is a monoterpene alcohol with various biochemical and pharmacological properties present in the essential oil of more than 160 species of herbs, (especially the Cymbopogon genus). In this study, we evaluated the anti‐nociceptive activity of GER in behavioural and electrophysiological in vitro experimental models of nociception using male Swiss mice. GER (12.5, 25 or 50 mg/kg i.p. and 50 or 200 mg/kg p.o.) reduced the number of writhes induced by acetic acid. The opioid antagonist naloxone (5 mg/kg s.c.) administered in mice subsequently treated with GER (25 mg/kg i.p.) did not reverse such anti‐nociceptive activity, suggesting a non‐opioid pathway for the mechanism of action. GER (12.5, 25 and 50 mg/kg i.p.) reduced paw licking time in the second phase of the formalin test. Also, in the glutamate test, GER when administered 50 mg/kg i.p. reduced paw licking time, probably modulating glutamatergic neurotransmission. GER blocked reversibly components of the compound action potential (CAP) recorded in isolated sciatic nerve in a dependent manner for concentration and drug exposure time: 1 mM to 120 min. for the first component and 0.6 mM to 90 min. for the second component. The IC50 was calculated for the peak‐to‐peak amplitude (PPA) at 0.48 ± 0.04 mM. The conduction velocity was also reduced by exposure to GER starting from the concentration of 0.3 mM for both components of the CAP. In conclusion, it is suggested that GER has anti‐nociceptive activity, especially in pain related to inflammation, and in part related to reduced peripheral nerve excitability.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-21T21:11:01.410154-05:
      DOI: 10.1111/bcpt.12630
  • Cyclophsopahmide‐induced Down‐Regulation of Uroplakin II in the Mouse
           Urinary Bladder Epithelium is Prevented by S‐Allyl Cysteine
    • Authors: Sayed Alilul Hasan Abdi; Abul Kalam Najmi, Sheikh Raisuddin
      Abstract: The alkylating anticancer drug, cyclophosphamide (CP), induces a number of toxic effects including haemorrhagic cystitis (HC) in the urinary bladder. Uroplakins are unique urinary transmembrane proteins of urothelium which may become potential targets of CP metabolites and reactive free radicals. Natural compounds, especially those rich in thiols, have shown protective effects against CP‐induced HC. In this study, we studied the modulatory effect of the thiol‐rich compound S‐allyl cysteine (SAC) on the mRNA level of uroplakin II by real‐time PCR and expression of uroplakin II protein by immunoblotting. SAC (150 mg/kg) showed significant (p < 0.001) protective effects against CP (200 mg/kg)‐induced alteration in mRNA level and protein expression of uroplakin II. SAC also protected animals from CP‐induced HC as assessed by gross morphological examination of urinary bladder. When compared with mercaptoethane sulfonic acid (mesna) (40 mg/kg), a known thiol‐rich drug, SAC, which has been in clinical application, was found to be more efficacious in affording protection in urinary bladder tissues. Role or uroplakins in CP‐induced urinary bladder toxicity has not been well investigated. The present study demonstrated that uroplakins may be the potential target of toxic metabolites of CP and natural compounds such as SAC have the capacity to modulate their expression leading to reduced toxicity burden on the urinary bladder epithelium.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-21T21:10:58.715411-05:
      DOI: 10.1111/bcpt.12627
  • A Danish Survey of Antihistamine Use and Poisoning Patterns
    • Authors: Louise Line Jensen; Janne Rømsing, Kim Dalhoff
      Abstract: The first‐generation antihistamine, promethazine, became a prescription‐only drug in Denmark as of December 2014. First‐generation antihistamines are known to have a higher toxic potential than second‐generation antihistamines. The aim of this study was to provide a nationwide description of the antihistamine use and poisoning pattern from 2007 to 2013 in Denmark based on two independent databases.There were 1049 antihistamine exposures in the national, advisory telephone service specialized in poisonings, the Danish Poison and Information Centre (DPIC), and 456 exposures in the three registers used within the State Serum Institute of Denmark (SSI), a department under the Danish Ministry of Health dealing with research‐based health surveillance in Denmark. First‐generation antihistamines constitute 61% and 73% of antihistamine registrations in DPIC and SSI, respectively. Antihistamine exposures increased by 7 exposures/10,000 enquiries per year in DPIC and 6 admissions per year in SSI – this increase is not significant due to a sudden decrease in 2012. Intentional exposures constituted 65% in DPIC of which 82% was due to suicide attempts, and 78% of the involved antihistamines were first‐generation antihistamines. Accidental exposures constituted 33% of which 61% were due to play and 29% involved first‐generation antihistamines. Single antihistamine exposures constituted 65% of DPIC exposures of which 98% involved only one brand of antihistamine. Multi‐drug exposures constituted 35% of DPIC exposures with equally distributed coingestants. Hospitalization was recommended in 78% of DPIC exposures. Admissions required only one day of treatment in 91% of the SSI exposures. One of the 14 identified deaths in the SSI study population was directly related to antihistamine poisoning. Results support the limited disclosure of promethazine in Denmark and illustrate a generation‐specific pattern indicating a suspected replacement of promethazine with other first‐generation antihistamines.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-21T21:10:54.600558-05:
      DOI: 10.1111/bcpt.12632
  • Association of Oseltamivir Activation with Gender and Carboxylesterase 1
           Genetic Polymorphisms
    • Authors: Jian Shi; Xinwen Wang, Rachel F. Eyler, Yan Liang, Li Liu, Bruce A. Mueller, Hao‐Jie Zhu
      Abstract: Oseltamivir, an inactive anti‐influenza virus prodrug, is activated (hydrolyzed) in vivo by carboxylesterase 1 (CES1) to its active metabolite oseltamivir carboxylate. CES1 functions are significantly associated with certain CES1 genetic variants and some non‐genetic factors. The purpose of this study was to investigate the effect of gender and several CES1 genetic polymorphisms on oseltamivir activation using a large set of individual human liver samples. CES1‐mediated oseltamivir hydrolysis and CES1 genotypes, including the G143E (rs71647871), rs2244613, rs8192935, the ‐816A>C (rs3785161) and the CES1P1/CES1P1VAR, were determined in 104 individual human livers. The results showed that hepatic CES1 protein expression in females was 17.3% higher than that in males (P = 0.039) while oseltamivir activation rate in the livers from female donors was 27.8% higher than that from males (P = 0.076). As for CES1 genetic polymorphisms, neither CES1 protein expression nor CES1 activity on oseltamivir activation was significantly associated with the rs2244613, rs8192935, ‐816A>C or CES1P1/CES1P1VAR genotypes. However, oseltamivir hydrolysis in the livers with the genotype 143G/E was approximately 40% of that with the 143G/G genotype (0.7 ± 0.2 versus 1.8 ± 1.1 nmole/mg protein/min, P = 0.005). In summary, the results suggest that hepatic oseltamivir activation appears to be more efficient in females than that in males, and the activation can be impaired by functional CES1 variants, such as the G143E. However, clinical implication of CES1 gender differences and pharmacogenetics in oseltamivir pharmacotherapy warrants further investigations.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-21T21:10:52.016112-05:
      DOI: 10.1111/bcpt.12625
  • Do Diuretics have Antinociceptive Actions: Studies of Spironolactone,
           Eplerenone, Furosemide and Chlorothiazide, Individually and with Oxycodone
           and Morphine
    • Authors: Viljami Jokinen; Tuomas Lilius, Jouko Laitila, Mikko Niemi, Oleg Kambur, Eija Kalso, Pekka Rauhala
      Abstract: Spironolactone, eplerenone, chlorothiazide and furosemide are diuretics that have been suggested to have antinociceptive properties, e.g. via mineralocorticoid receptor antagonism. In co‐administration, diuretics might enhance the antinociceptive effect of opioids via pharmacodynamic and pharmacokinetic mechanisms.Effects of spironolactone (100 mg/kg, i.p.), eplerenone (100 mg/kg, i.p.), chlorothiazide (50 mg/kg, i.p.) and furosemide (100 mg/kg, i.p.) were studied on acute oxycodone (0.75 mg/kg, s.c.) and morphine (3 mg/kg, s.c.) induced antinociception using tail‐flick and hot plate tests in male Sprague‐Dawley rats. The diuretics were administered 30 min. before the opioids, and behavioural tests were performed 30 and 90 min. after the opioids. Concentrations of oxycodone, morphine and their major metabolites in plasma and brain were quantified by mass spectrometry.In the hot plate test at 30 and 90 min., spironolactone significantly enhanced the antinociceptive effect (% of maximum possible effect) of oxycodone from 10% to 78% and from 0% to 50%, respectively, and that of morphine from 12% to 73% and from 4% to 83%, respectively. The brain oxycodone and morphine concentrations were significantly increased at 30 min. (oxycodone, 46%) and at 90 min. (morphine, 190%). We did not detect any independent antinociceptive effects with the diuretics. Eplerenone and chlorothiazide did not enhance the antinociceptive effect of either opioid. The results suggest that spironolactone enhances the antinociceptive effect of both oxycodone and morphine by increasing their concentrations in the central nervous system.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-21T21:10:43.977567-05:
      DOI: 10.1111/bcpt.12634
  • Visfatin Triggers the Cell Motility of Non‐Small Cell Lung Cancer
           (NSCLC) via Up‐Regulation of Matrix Metalloproteinases (MMPs)
    • Authors: Guanghai Wang; Wenjun Tian, Yiqing Liu, Ying Ju, Yajuan Shen, Shengmei Zhao, Bingchang Zhang, Yu Li
      Abstract: High levels of visfatin are correlated with worse clinical prognosis of various cancers. Still, the effects and mechanisms of visfatin on progression of non‐small cell lung cancer (NSCLC) remain unclear. Our present study revealed that plasma levels of visfatin in NSCLC patients (585 ± 287 pg/ml) were significantly (p
      PubDate: 2016-07-21T21:05:52.679677-05:
      DOI: 10.1111/bcpt.12623
  • Absorption of Bupivacaine after Administration of a Lozenge as Topical
           Treatment for Pain from Oral Mucositis
    • Authors: Stine Mogensen; Eva Sverrisdóttir, Kolbrún Sveinsdóttir, Charlotte Treldal, Kenneth Jensen, Anders Bonde Jensen, Claus Andrup Kristensen, Jette Jacobsen, Mads Kreilgaard, Janne Petersen, Ove Andersen
      Abstract: The aim was to investigate systemic exposure after administration of a novel bupivacaine lozenge in healthy individuals with normal mucosa and in head and neck cancer (HNC) patients with oral mucositis.A lozenge containing 5 mg, 10 mg, 25 mg and 50mg bupivacaine, respectively, was administered as single dose to 10 healthy invididuals and lozenge containing 25 mg bupivacaine was administered as single dose to 10 HNC patients with oral mucositis and as multiple doses to 5 HNC patients. Blood samples were collected for 6 hr from the healthy individuals and 3 hr from the HNC patients, respectively, after administration. The plasma concentration‐time profiles of bupivacaine were fitted to pharmacokinetic models using non‐linear mixed effects modelling, evaluating demographics and health status as covariates.The population pharmacokinetics (PK) of bupivacaine lozenge was best described by a two‐compartment distribution model with absorption transit compartments. All observed plasma concentrations were well below bupivacaine concentrations (2000‐2250 ng/ml) which have caused toxic symptoms. The PK model suggested that relative bioavailability was 2‐fold higher in HNC patients with oral mucositis grade 1‐2, and 3‐fold higher in HNC patients with oral mucositis grade 3‐4 than in the healthy individuals. Simulations showed that the plasma concentrations would be below the toxic limit after repeated dosing every second hour with 25 mg bupivacaine for 5 days.The 25 mg bupivacaine lozenges were safe without systemic toxic levels of bupivacaine or risk of side effects. Based on PK simulations of repeated doses of 25 mg every 2 hr for 16 hr a day, the lozengscan be administered with minimum risk of exceeding the toxic limit.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-19T01:50:33.256595-05:
      DOI: 10.1111/bcpt.12644
  • Human Hepatic HepaRG Cells Maintain an Organotypic Phenotype with High
           Intrinsic CYP450 Activity/Metabolism and Significantly Outperform Standard
           HepG2/C3A Cells for Pharmaceutical and Therapeutic Applications
    • Authors: Leonard J. Nelson; Katie Morgan, Philipp Treskes, Kay Samuel, Catherine J. Henderson, Claire LeBled, Natalie Homer, M. Helen Grant, Peter C. Hayes, John N. Plevris
      Abstract: Conventional in vitro human hepatic models for drug testing are based on the use of standard cell lines derived from hepatomas or primary human hepatocytes (PHHs). Limited availability, inter‐donor functional variability and early phenotypic alterations of PHHs restrict their use; whilst standard cell lines such as HepG2 lack a substantial and variable set of liver‐specific functions such as CYP450 activity. Alternatives include the HepG2‐derivative C3A cells selected as a more differentiated and metabolically active hepatic phenotype. Human HepaRG cells are an alternative organotypic co‐culture model of hepatocytes and cholangiocytes reported to maintain in vivo‐like liver‐specific functions, including intact Phase 1‐3 drug metabolism. In this study, we compared C3A and human HepaRG cells using phenotypic profiling, CYP450 activity and drug metabolism parameters to assess their value as hepatic models for pre‐clinical drug testing or therapeutics. Compared with C3As, HepaRG co‐cultures, exhibit a more organotypic phenotype, including evidence of hepatic polarity with strong expression of CYP3A4, the major isoform involved in the metabolism of over 60% of marketed drugs. Significantly greater CYP450 activity and expression of CYP1A2, CYP2E1 and CYP3A4 genes in HepaRG cells (comparable with that of human liver tissue) was demonstrated. Moreover, HepaRG cells also preferentially expressed the hepatic integrin α5β1 – an important modulator of cell behaviour including growth and survival, differentiation and polarity. Drug metabolite profiling of phenacetin (CYP1A2) and testosterone (CYP3A4) using LC‐MS/MS and HPLC, respectively, revealed HepaRGs had more intact (Phase 1‐2) metabolism profile. Thus, HepaRG cells significantly outperform C3A cells for potential pharmaceutical and therapeutic applications.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-15T21:00:33.854368-05:
      DOI: 10.1111/bcpt.12631
  • Pharmacokinetic Profile of Oral Magnesium Hydroxide
    • Authors: Mette Konow Bøgebjerg Dolberg; Lars Peter Nielsen, Ronald Dahl
      Abstract: Despite the presumption of a beneficial effect of magnesium (Mg) supplementation on various diseases, little is known concerning the pharmacokinetics of Mg hydroxide. This study was designed to provide a pharmacokinetic profile of Mg hydroxide after a single oral dose.Ten healthy male adults participated in this cross‐over study with three 24‐hr study days. Interventions were: 1) none (baseline), 2) oral intake of three (3 x 360 mg) tablets of Mg hydroxide (Mablet®) and 3) IV bolus infusion of 2 g Mg sulphate (index drug). Blood samples were collected before the single dose, after (i.e. post treatment administration) 15, 30, 60, 90 and 120 min. – and after 3, 4, 6, 8, 12 and 24 hr. Urine was collected in four 6‐hr periods per study day.Blood (N=10) and urine (N=6) Mg were analysed by descriptive statistics. Bioavailability was 14.9% (CI: 8.3; 26.8), blood clearance was 5.1 L/hr (CI: 2.1; 17.0), apparent volume of distribution was 60.2 L (CI: 35.6; 102.0), elimination constant was 0.08 hr−1 (CI: 0.05; 0.14), half‐life was 8.3 hr (CI: 4.8; 14.1), Cmax was 0.11 mmol/L (CI: 0.07; 0.14), and AUC(0‐24) was 92.3 mmol/L x minutes (CI: 45.5; 139.1). Urine Mg excretion augmented by 17.7% (CI: 8.9; 35.0) from baseline. No severe side effects.Mg hydroxide demonstrates a 15% bioavailability, and it constitutes a clinically relevant option for oral Mg supplementation. No severe side effects were seen.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-14T04:40:20.819729-05:
      DOI: 10.1111/bcpt.12642
  • Drug‐Mediated Gene Regulation of Vitamin D3 Metabolism in Primary
           Human Dermal Fibroblasts
    • Authors: Maria Norlin; Johan Lundqvist, Maria Ellfolk, Maritta Hellström Pigg, Jan Gustafsson, Kjell Wikvall
      Abstract: Vitamin D metabolism was studied in primary human dermal fibroblasts with focus on drug‐mediated gene regulation related to adverse side effects of antiretroviral drugs used in HIV therapy. The fibroblasts expressed mRNA for cytochrome P450 (CYP) enzymes catalysing bioactivating (CYP2R1, CYP27A1 and CYP27B1) and catabolic reactions (CYP24A1). The cells produced both 25‐hydroxyvitamin D3 and 1α,25‐dihydroxyvitamin D3. The results demonstrate that primary dermal fibroblasts have an active vitamin D3 metabolising system. High incidence of low bone mineral density is a concern for HIV‐infected patients treated with antiretroviral drugs. Osteomalacia and severe vitamin D deficiency have been reported. We investigated whether drug‐mediated gene regulation could be a possible mechanism behind these adverse drug effects. Fibroblasts were treated with different drugs used in HIV therapy and the 1α,25‐dihydroxyvitamin D3 levels and relative mRNA‐levels for crucial enzymes were determined. Efavirenz, stavudine and ritonavir significantly down‐regulated the bioactivating CYP2R1 and up‐regulated the catabolic CYP24A1. The drugs reduced bioactivating enzyme activities and cellular levels of 1α,25‐dihydroxyvitamin D3. The current results indicate that effects on gene expression may lead to disturbed vitamin D metabolism and decreased cellular levels of active vitamin D3. The data are consistent with the impaired bone health in patients treated with certain antiretroviral drugs.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-12T07:50:27.400683-05:
      DOI: 10.1111/bcpt.12641
  • Silencing Op18/stathmin by RNA interference promotes the sensitivity of
           nasopharyngeal carcinoma cells to taxol and high grade differentiation of
           xenografted tumours in nude mice
    • Authors: Xuechi Lin; Ting Yu, Lingxi Zhang, Sangyan Chen, Xian Chen, Ying Liao, Dan Long, Fang Shen
      Abstract: Nasopharyngeal carcinoma (NPC) is a refractory tumour, and chemotherapy is one of the primary treatment modalities. Oncoprotein 18 (Op18)/stathmin is a conserved small cytosolic phosphoprotein and highly expressed in tumours, which plays a vital role in maintaining the malignant phenotype of tumours. Taxol (fig. 1) is a clinically widely used chemotherapeutics agent for a broad range of taxol‐resistant tumours. This study showed that Op18/stathmin silencing by RNA interference (RNAi) combined taxol cooperatively improved cellular apoptosis in CNE1 cells mainly via initiating endogenous death receptor pathway, impaired the capabilities of cellular proliferation and cellular migration, down‐regulated the half maximal inhibitory concentration (IC50) of taxol, meanwhile, decreased the expression of the upstream extracellular regulated kinase 1 (ERK1) in vitro. Evidences also showed that taxol cytotoxicity was markedly augmented for Op18/stathmin RNAi in other NPC cells. In vivo animal experiments have demonstrated that early combination of Op18/stathmin silencing and taxol evidently inhibited tumourigenicity of CNE1 cells and growth of xenografted tumours in nude mice. Remarkably, silencing Op18/stathmin by RNAi still promoted transformation of late‐stage CNE1 cells in NPC‐xenografted tumours from moderately to highly differentiated, inhibited the pleiotropic cytokine interleukin 10 (IL‐10) autocrine by transplanted tumours. These findings suggest that silencing Op18/stathmin by RNAi promotes chemosensitization of NPC to taxol and reverses malignant phenotypes of NPC, which provides a new clue for treating drug‐resistant tumours.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-12T02:26:01.112288-05:
      DOI: 10.1111/bcpt.12633
  • In Vitro Effects of the Neolignan 2,3‐Dihydrobenzofuran against
           Leishmania Amazonensis
    • Authors: Luciano Gomes Castro Oliveira; Lucas Moreira Brito, Michel Muálem Moraes Alves, Layane Valéria Amorim, Enoque Pereira Costa Sobrinho‐Júnior, Camila Ernanda Sousa Carvalho, Klinger Antonio da Franca Rodrigues, Daniel Dias Rufino Arcanjo, Antônia Maria das Graças Lopes Citó, Fernando Aécio Amorim Carvalho
      Abstract: Leishmaniasis is an infectious disease complex caused by a protozoa from the Leishmania genus, which presents a broad spectrum of clinical manifestations: cutaneous, mucocutaneous and visceral forms. The current treatments are unsatisfactory considering few drugs are available and present some level of toxicity. Many lignans and neolignans have been used for the development of new anti‐Leishmania drugs. The capability in vitro of the neolignan 2,3‐dihydrobenzofuran (2,3‐DBF), a commonly found constituent of propolis and other plants, to inhibit the growth of promastigote and macrophages‐internalized amastigote forms of Leishmania amazonensis was investigated. The cytotoxicity of this compound was assessed by MTT (3‐[4,5‐dimethylthiazol‐2‐yl]‐2,5‐diphenyltetrazolium bromide) test in Balb/c murine macrophages and human erythrocyte lysis assay. The 2,3‐DBF was active against promastigotes (IC50=1.042 μM) and amastigotes (IC50=1.43 μM) forms, indicating a potent anti‐leishmanial effect. There was no evidence of cytotoxicity to macrophages or erythrocytes at concentrations ranging from 13 to 0.5 μM, after 48 hr of exposure. The anti‐leishmanial activity is probably mediated by the activation of macrophages, since treatment with 2,3‐DBF increases both phagocytic and lysosomal activities, as well as the nitrite (NO2‐) levels. These results suggest that 2,3‐DBF may be a potential candidate for the development of a new promising anti‐leishmanial drug. Further studies are needed to determine its potential in vivo effect as well as additional mechanisms underlying the anti‐leishmanial and immunomodulatory activities.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-11T08:45:25.285704-05:
      DOI: 10.1111/bcpt.12639
  • Concentration‐Response Relationship of Hearing Impairment Caused by
           Quinine and Salicylate: Pharmacological Similarities but different
           molecular mechanisms
    • Authors: Gunnar Alvan; Erik Berninger, Lars L. Gustafsson, Kjell K. Karlsson, Gilles Paintaud, Monique Wakelkamp
      Abstract: This review has the purpose to summarise concentration‐effect studies made with quinine and to compare the effects on hearing between quinine and salicylate. Quinine and salicylate have roles in experimental hearing research and may induce pronounced and reversible hearing impairment when administered in sizeable doses. The quinine‐induced increase in hearing threshold and its recovery can be analysed according to “the psychophysical power function”. The power function is a special case of the Hill equation when the stimulus (e.g., a drug concentration) is exceedingly small compared with the concentration that would elicit a half maximum response. Quinine and salicylate induce sensorineural hearing impairment and tinnitus when given in higher dose ranges in man. The drugs influence presence, magnitude and quality of audiological responses, such as spontaneous and evoked otoacoustic emissions. Quinine reversibly reduces frequency selectivity and hearing sensitivity, whereas the self‐attained most comfortable speech level and the acoustic stapedius reflex are not affected, i.e. the dynamic range of hearing is reversibly reduced. This observation supports the view that quinine acts on the outer hair cell of the cochlea. Both drugs share a protective effect against the permanent hearing damages caused by gentamicin. This action is interpreted as a request for functioning mechanoelectric transducer (MET) channels to elicit the ill effect of aminoglycosides. Both drugs may interfere with the cochlear amplifier through blocking MET channels and the motor protein prestin. This review finds considerable overlap between type and extent of pharmacological actions of quinine and salicylate, supposedly caused by partly shared mechanisms of action but using different molecular mechanisms.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-11T08:36:02.847666-05:
      DOI: 10.1111/bcpt.12640
  • Safety, Pharmacokinetics and Pharmacodynamics of the Selective
           Glucocorticoid Receptor Modulator AZD5423 after Inhalation in Healthy
    • Authors: Viktoria Werkström; Susanne Prothon, Ella Ekholm, Carin Jorup, Staffan Edsbäcker
      Abstract: AZD5423 is a selective glucocorticosteroid receptor modulator developed for the inhaled use in asthma and COPD. This paper reports the initial, first‐in‐man, single and repeat dose‐escalating studies in healthy male individuals, including one cohort of male Japanese individuals. Inhaled, nebulized AZD5423 was safe and well tolerated up to and including the highest doses tested for up to 2 weeks of once‐daily treatment. Plasma exposure suggested dose proportional pharmacokinetics and dose‐related effects on 24‐hr plasma and urine cortisol. There were no or marginal effects on other biomarkers tested (Osteocalcin, TRAP5b, DHEA‐S and 4βOH‐cholesterol). No clinically relevant differences in safety or pharmacokinetics could be distinguished between the two study populations, although hypothalamus‐pituitary‐adrenal (HPA) effects appeared to be marginally greater in the Japanese versus the Caucasian dominant study population. AZD5423, inhaled via nebulisation, can be used in healthy individuals at doses of at least 300 μg for two weeks. The effects on the HPA axis reported herein, together with efficacy data reported elsewhere, indicate that benefit risk ratio may be improved relative to conventional inhaled steroids.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-08T03:25:26.404287-05:
      DOI: 10.1111/bcpt.12621
  • An Effective Machine Learning Approach for Prognosis of Paraquat Poisoning
           Patients Using Blood Routine Indexes
    • Authors: Huiling Chen; Lufeng Hu, Huaizhong Li, Guangliang Hong, Tao Zhang, Jianshe Ma, Zhongqiu Lu
      Abstract: The early identification of toxic paraquat (PQ) poisoning in patients critical to ensure timely and accurate prognosis. Though plasma PQ concentration has been reported as a clinical indicator of PQ poisoning, it is not commonly applied in practice due to the inconvenient necessary instruments and operation. In this study, we explored the use of blood routine indexes to identify the degree of PQ toxicity and/or diagnose PQ poisoning in patients via machine learning approach. Specifically, we developed a method based on support vector machine combined with the feature selection technique to accurately predict PQ poisoning risk status, then tested the method on 79 (42 male and 37 female; 41 living and 38 deceased) patients. The detection method was rigorously evaluated against a real‐world dataset to determine its accuracy, sensitivity and specificity. Feature selection was also applied to identify factors correlated with risk status, and results showed that there are significant differences in blood routine indexes between dead and living PQ‐poisoned individuals (p‐value < 0.01). Feature selection also showed that the most important correlated indexes are white blood cell and neutrophils. In conclusion, the toxicity or prognosis of PQ poisoning can be preliminarily ascertained by blood routine testing without PQ concentration data, representing an additional tool and innovative approach to assess prognosis of PQ poisoning.This article is protected by copyright. All rights reserved.
      PubDate: 2016-07-08T02:55:32.799654-05:
      DOI: 10.1111/bcpt.12638
  • Neuromuscular Effects of Rocuronium Bromide in Patients in Statin Therapy
           for at least Three Months
    • Authors: Hongwei Ren; Huangwei Lv
      Abstract: Statins cause skeletal muscle myopathy. However, the neuromuscular effects of non‐depolarizing neuromuscular blocking agent in patients in long‐term statin therapy remain unclear. Hence, we investigated the neuromuscular effects of rocuronium and muscle injury in patients in long‐term statin therapy. Eighteen statin users using statins for at least 3 months were included in the statin group and 18 non‐statin users were included in the non‐statin group. General anaesthesia was induced with intravenous midazolam, etomidate, sufentanil and rocuronium 0.9mg·kg‐1 (3ED95) for intubation. Anaesthesia was maintained with 1% propofol and remifentanil. The onset time and duration 10% T1 and 25% T1 of rocuronium was recorded. Blood samples were obtained before induction, and 5 min., 1 hr, 2 hr, 4 hr, 12 hr and 24 hr after rocuronium administration to measure creatine kinase (CK), myoglobin and potassium. Myalgia was determined at 2 hr and 24 hr after surgery. There were no significant differences in the basic clinical characteristics between the two groups. The onset time of the statin group was significantly shorter than that of the non‐statin group (p=0.02), while the duration 10% T1 and 25% T1 of the statin group was significantly longer than that of the non‐statin group (p=0.006; p=0.045). The myoglobin and CK concentrations increased after rocuronium administration as compared to baseline in both groups. CK concentration in the statin group was significantly higher than in the non‐statin group just at 24 hr (p=0.000003). However, myoglobin showed no significant difference between the two groups. The onset time of rocuronium decreases and its duration time increases in patients in long‐term statin therapy.This article is protected by copyright. All rights reserved.
      PubDate: 2016-06-24T01:45:24.955624-05:
      DOI: 10.1111/bcpt.12628
  • Low‐Chlorinated Non‐Dioxin‐like PCBs Present in Blood and Breast
           Milk Induce Higher Levels of Reactive Oxygen Species in Neutrophil
           Granulocytes than Highly Chlorinated Congeners
    • Authors: Hanne Friis Berntsen; Frode Fonnum, Sven Ivar Walaas, Inger Lise Bogen
      Abstract: Despite their ban several decades ago, polychlorinated biphenyls (PCBs) still pose a health threat to human beings due to their persistent and accumulative nature and continued presence in the environment. Non‐dioxin‐like (NDL)‐PCBs have earlier been found to have effects on the immune system, including human neutrophil granulocytes. The aim of this study was to investigate differences between ortho‐chlorinated NDL‐PCBs with a low or high degree of chlorination in their capability to induce the production of reactive oxygen species (ROS) in human neutrophil granulocytes in vitro. We used some of the congeners occurring at the highest levels in blood, breast milk and food; PCB 52 representing the low chlorinated and PCB 180 the high chlorinated congeners. In addition, the extensively studied PCB 153 was included as a reference compound. ROS production was assessed with the luminol‐amplified chemiluminescence and DCF fluorescence assays. The involvement of intracellular signalling mechanisms was investigated using different pharmacological substances. At high concentrations (10‐20 μM), PCB 52 induced more ROS than PCB 153 and PCB 180. The role of extracellular signal regulated kinase (ERK) 1/2 and/or ERK 5 signalling in PCB‐induced ROS production was implicated through the reduction in ROS in the presence of the specific inhibitor U0126, whereas reduced ROS production after use of SB203580 and SP600125 indicated involvement of the p38 mitogen activated protein kinase (MAPK) and c‐Jun amino‐terminal kinase (JNK) pathways, respectively. In addition, the calcineurin inhibitor FK‐506, the intracellular calcium chelator BAPTA‐AM and the anti‐oxidant vitamin E reduced the levels of ROS. The intracellular signalling mechanisms involved in ROS production in human neutrophil granulocytes appeared to be similar for PCB 52, PCB 153 and PCB 180. Based on the results from the present and previous studies, we conclude that for abundant ortho‐chlorinated PCBs found in blood, low chlorinated congeners induce higher production of ROS in neutrophil granulocytes than highly chlorinated congeners. This could be relevant during acute exposure scenarios when high concentrations of PCBs are present.This article is protected by copyright. All rights reserved.
      PubDate: 2016-06-12T23:20:31.771742-05:
      DOI: 10.1111/bcpt.12620
  • S‐Nitrosothiols as Platforms for Topical Nitric Oxide Delivery
    • Authors: Marcelo Ganzarolli Oliveira
      Abstract: Nitric oxide (NO) is a small radical species involved in several fundamental physiological processes, including the control of vascular tone, the immune response and neuronal signalling. Endothelial dysfunction with decreased NO bioavailability is the underlying cause of several diseases and has led to the development of a wide range of systemic NO‐donor compounds to lower the blood pressure and control hypertensive crises. However, several potential therapeutic actions of NO, not related to the cardiovascular system, demand exclusively local actions. Primary S‐nitrosothiols (RSNOs) are endogenously found NO carriers and donors and have emerged as platforms for the localized delivery of NO in topical applications. Formulations for this purpose have evolved from low molecular weight RSNOs incorporated in polymeric films, hydrogels and viscous vehicles, to polymeric RSNOs where the SNO moiety is covalently bound to the polymer backbone. The biological actions displayed by these formulations include the increase of dermal vasodilation, the acceleration of wound healing, the killing of infectious microorganisms and analgesic action against inflammatory pain. This MiniReview focuses on the state of the art of experimental topical formulations for NO delivery based on S‐nitrosothiols and their potential therapeutic applications.This article is protected by copyright. All rights reserved.
      PubDate: 2016-03-30T21:10:36.798009-05:
      DOI: 10.1111/bcpt.12588
  • Potential Future Pharmacological Treatment of Bladder Dysfunction
    • Authors: Karl‐Erik Andersson
      Abstract: In the last decades, a number of new antimuscarinic drugs have been introduced for treatment of the overactive bladder (OAB), defined symptomatically (OAB syndrome) or urodynamically (detrusor overactivity). Recently, three new drug principles have been approved for clinical use, the β3‐adrenoceptor agonist, mirabegron, the phosphodiesterase 5‐inhibitor, tadalafil, and the blocker of afferent and efferent nerves, botulinum toxin. However, new alternatives are continuously being explored. OAB is a filling disorder, and ATP is involved in the generation of afferent impulses. One way of blocking the ATP afferent pathway is through the use of P2X3 receptor antagonists. In animal models, this strategy appears to work very well, but whether it translates effectively to man remains to be established. Evidence suggests that components of the endocannabinoid system are involved in regulation of bladder function. Clinical studies of cannabinoid extracts on LUTS are scarce and essentially restricted to MS patients, and the results have so far not been convincing. Amplification of endocannabinoid activity by inhibiting their degradation via fatty acid amide hydrolase inhibitors may be an attractive approach, but no clinical experiences in OAB have been reported. Studies of the lower urinary tract have indicated that several transient receptor potential (TRP) channels, including TRPV1, TRPV2, TRPV4, TRPM8 and TRPA1, are expressed in the bladder and may act as sensors of stretch and/or chemical irritation. Animal studies have shown that inhibition of these pathways can be effective for the reduction of bladder activity. However, the roles of these channels for normal function and in pathological states have not been established, and so far adverse effects (hyperthermia) have hampered development of antagonists.This article is protected by copyright. All rights reserved.
      PubDate: 2016-03-17T09:26:27.805879-05:
      DOI: 10.1111/bcpt.12577
  • Inhibition of Protein Disulfide Isomerase in Thrombosis
    • Authors: Roelof H. Bekendam; Robert Flaumenhaft
      Abstract: This MiniReview addresses our current understanding of the mechanisms by which protein disulfide isomerase (PDI) mediates thrombus formation and discusses the potential of blocking thrombosis by targeting PDI. Thiol isomerases are ubiquitous oxidoreductases primarily localized to the endoplasmic reticulum (ER) where they serve a critical role in protein folding. PDI is the founding member of the thiol isomerase family. Although PDI is an essential intracellular enzyme, it can participate in pathological processes once released from cells. In particular, PDI serves a critical role in thrombus formation, the underlying cause of myocardial infarction and stroke. Both platelets and endothelial cells secrete PDI upon vascular injury. Secreted PDI appears to activate multiple extracellular substrates in the vasculature, enabling the initiation of thrombus formation. As an essential component of thrombus formation, extracellular PDI represents a new target for pharmacological inhibition of clinical thrombosis. Quercetin‐3‐rutinoside, a flavonol highly abundant in common foods, inhibits PDI and blocks thrombus formation both in vitro and in vivo. Such observations have prompted clinical trials targeting PDI in thrombotic diseases.This article is protected by copyright. All rights reserved.
      PubDate: 2016-02-25T09:33:51.713196-05:
      DOI: 10.1111/bcpt.12573
  • The role of nitric oxide and hydrogen sulfide in urinary tract function
    • Authors: Vítor S. Fernandes; Medardo Hernández
      Abstract: This MiniReview focuses on the role played by nitric oxide (NO) and hydrogen sulfide (H2S) in physiology of the upper and lower urinary tract. NO and H2S, together with carbon monoxide, belong to the group of gaseous autocrine/paracrine messengers or gasotransmitters, which are employed for intra‐ and inter‐cellular communication in almost all organ systems. Because they are lipid‐soluble gases, gaseous transmitters are not constrained by cellular membranes, so that their storage in vesicles for later release is not possible. Gasotransmitter signals are terminated by falling concentrations upon reduction of production that are caused by reacting with cellular components (essentially reactive oxygen species and NO), binding to cellular components or diffusing away. NO and, more recently, H2S have been identified as key mediators in neurotransmission of the urinary tract, involved in the regulation of ureteral smooth muscle activity and urinary flow ureteral resistance, as well as by playing a crucial role in the smooth muscle relaxation of bladder outlet region. Urinary bladder function is also dependent on integration of inhibitory mediators, such as NO, released from the urothelium. In the bladder base and distal ureter, the colocalization of neuronal NO synthase with substance P and calcitonin‐gene related peptide in sensory nerves, as well as the existence of a high nicotinamide adenine dinucleotide phosphate‐diaphorase activity in dorsal root ganglion neurons also suggests the involvement of NO as a sensory neurotransmitter.This article is protected by copyright. All rights reserved.
      PubDate: 2016-02-11T07:27:31.243861-05:
      DOI: 10.1111/bcpt.12565
  • Physiology and Pharmacology of Ejaculation
    • Authors: Pierre Clement; François Giuliano
      Abstract: Ejaculation is the final stage of coitus in mammalian male and is mandatory for natural procreation. Two synchronized phases, emission and expulsion, form the ejaculatory response and involve specific organs and anatomical structures. The peripheral events leading to ejaculation are commanded by autonomic (sympathetic and parasympathetic) and somatic divisions of the nervous system. The autonomic and somatic motor efferents originate in spinal nuclei located in thoracolumbar and lumbosacral segments. Co‐ordinated activation of autonomic and somatic spinal nuclei is orchestrated by a group of lumbar spinal interneurons defined as the spinal generator of ejaculation. The generator of ejaculation together with the autonomic and somatic spinal nuclei constitutes a spinal network that is under the strong influence of stimulating or inhibiting genital sensory and supraspinal inputs. A brain circuitry dedicated to ejaculation has been delineated that is part of a more global network controlling other aspects of the sexual response. This circuitry includes discrete neuronal populations distributed in all divisions of the brain. The corollary to the expanded CNS network is the variety of neurotransmitter systems participating in the ejaculatory process. Among them, serotonin neurotransmission plays a key role and its targeting led to the development of the first registered pharmacological treatment of premature ejaculation in human beings. Critical gaps remain in the understanding of neurophysiopharmacology of ejaculation and management of ejaculatory disorders in human beings needs improvement. Because the ejaculatory response in laboratory animals and in human beings shares many similarities, the use of animal models will certainly provide further advances in the field.
      PubDate: 2016-02-02T23:51:42.885699-05:
      DOI: 10.1111/bcpt.12546
  • Scaffold‐free Tissue Formation under Real and Simulated Microgravity
    • Authors: Ganna Aleshcheva; Johann Bauer, Ruth Hemmersbach, Lasse Slumstrup, Markus Wehland, Manfred Infanger, Daniela Grimm
      Abstract: Scaffold‐free tissue formation in microgravity is a new method in regenerative medicine and an important topic in Space Medicine. In this MiniReview, we focus on recent findings in the field of tissue engineering that were observed by exposing cells to real microgravity in Space or to devices simulating to at least some extent microgravity conditions on Earth (ground‐based facilities). Under both conditions – real as well as simulated microgravity – a part of the cultured cells of various populations detaches from the bottom of a culture flask. The cells form three‐dimensional (3D) aggregates resembling the organs from which the cells have been derived.This article is protected by copyright. All rights reserved.
      PubDate: 2016-01-30T09:06:04.480386-05:
      DOI: 10.1111/bcpt.12561
  • Mechanisms Involved in Thromboxane A2‐induced Vasoconstriction of Rat
           Intracavernous Small Penile Arteries
    • Authors: Martin Grann; Simon Comerma‐Steffensen, Daniel D. R. Arcanjo, Ulf Simonsen
      Abstract: Diabetes is associated with erectile dysfunction and with hypercontractility in erectile tissue and this is in part ascribed to increased formation of thromboxane. Rho kinase (ROCK) is a key regulator of calcium sensitization and contraction in vascular smooth muscle. This study investigated the role of calcium and ROCK in contraction evoked by activation of the thromboxane receptors. Rat intracavernous penile arteries were mounted for isometric tension and intracellular calcium ([Ca2+]i) recording and corpus cavernosum for measurements of MYPT1 phosphorylation. In penile arteries, U46619 by activation of thromboxane receptors concentration dependently increased calcium and contraction. U46619‐induced calcium influx was blocked by nifedipine, a blocker of L‐type calcium channels, and by 2‐aminoethoxydiphenyl borate, a blocker of transient receptor potential (TRP) channels. Inhibitors of ROCK, Y27632 and glycyl‐H1152P, concentration dependently reduced U46619‐induced contraction, but only Y27632 reduced [Ca2+]i levels in the penile arteries activated with either high extracellular potassium or U46619. MYPT‐Thr850 phosphorylation in corpus cavernous strips was increased in response to U46619 through activation of TP receptors and was found to be a direct result of phosphorylation by ROCK. Y27632 induced less relaxation in mesenteric arteries, H1152P induced equipotent relaxations, and a protein kinase C inhibitor, Ro‐318220, failed to relax intracavernous penile arteries, but induced full relaxation in rat mesenteric arteries. Our findings suggest that U46619 contraction depends on Ca2+ influx through L‐type and TRP channels, and ROCK‐dependent mechanisms in penile arteries. Inhibition of the ROCK pathway is a potential approach for the treatment of erectile dysfunction associated with hypertension and diabetes.
      PubDate: 2016-01-25T01:53:39.648065-05:
      DOI: 10.1111/bcpt.12544
  • MicroRNAs in Bladder Outlet Obstruction: Relationship to Growth and Matrix
    • Authors: Mari Ekman; Sebastian Albinsson, Bengt Uvelius, Karl Swärd
      Abstract: The discovery of microRNAs (miRNAs), which are ~22 nucleotide RNAs that inhibit protein synthesis in a sequence‐specific manner and are present in a range of species, has born hope of new therapeutic strategies. miRNAs play important roles in development and disease, but they remain poorly studied in uropathologies beyond cancer. Here, we discuss biological functions of miRNAs in the lower urogenital tract. A special focus is on miRNAs that change in bladder outlet obstruction (BOO). This is a condition that affects nearly one third of all men over 60 years and that involves growth and fibrosis of the urinary bladder. Animal models of BOO, such as that in rat, have been developed, and they feature a massive 6‐fold bladder growth over 6 weeks. Using microarrays, we have charted the miRNAs that change during the time course of this process and identified several with important modulatory roles. We discuss known and predicted functions of miR‐1, miR‐29, miR‐30, miR‐132/212, miR‐204 and miR‐221, all of which change in BOO. The majority of the miRNA‐mediated influences in BOO are expected to favour growth. We also outline evidence that miR‐29 represents a key effector molecule in a generic response to mechanical distension that is designed to counteract exaggerated organ deformation via effects on matrix deposition and stiffness. We conclude that miRNAs play important roles in bladder remodelling and growth and that they may be targeted pharmacologically to combat diseases of the lower urinary tract.
      PubDate: 2016-01-14T22:12:24.671191-05:
      DOI: 10.1111/bcpt.12534
  • Issue Information
    • Pages: 419 - 420
      PubDate: 2016-10-13T22:22:38.337351-05:
      DOI: 10.1111/bcpt.12469
  • The Transient Receptor Potential Vanilloid 1 (TRPV1) Antagonist
           Capsazepine Improves the Impaired Lung Mechanics during Endotoxemia
    • Authors: Layla D. M. Cabral; Alexandre Giusti‐Paiva
      First page: 421
      Abstract: Acute lung injury (ALI) caused by systemic inflammatory response remains a leading cause of morbidity and mortality in critically ill patients. Management of patients with sepsis is largely limited to supportive therapies, reflecting an incomplete understanding of the underlying pathophysiology. Furthermore, there have been limited advances in the treatments for ALI. In the present study, lung function and a histological analysis were performed to evaluate the impact of transient receptor potential vanilloid‐1 receptor (TRPV1) antagonist (capsazepine; CPZ) on the lipopolysaccharide (LPS)‐induced lung injury in mice. For this, adult mice pre‐treated with CPZ or vehicle received intraperitoneal injections of LPS or saline and 24 hr after, the mice were anaesthetized, and lung mechanics was evaluated. The LPS‐challenged mice exhibited substantial mechanical impairment, characterized by increases in respiratory system resistance, respiratory system elastance, tissue damping and tissue elastance. The pre‐treatment with CPZ prevented the increase in respiratory system resistance and decreased the increase in tissue damping during endotoxemia. In addition, mice pre‐treated with CPZ had an attenuated lung injury evidenced by reduction on collapsed area of the lung parenchyma induced by LPS. This suggests that the TRPV1 antagonist capsazepine has a protective effect on lung mechanics in ALI during endotoxemia and that it may be a target for enhanced therapeutic efficacy in ALI.This article is protected by copyright. All rights reserved.
      PubDate: 2016-05-24T22:55:31.438711-05:
      DOI: 10.1111/bcpt.12605
  • Optimized Animal Model of CTX‐induced Bone Marrow Suppression
    • Authors: Lizhi Feng; Qiuju Huang, Zhiying Huang, Hang Li, Xiaoxiao Qi, Ying Wang, Zhongqiu Liu, Xiaohong Liu, Linlin Lu
      First page: 428
      Abstract: Myelosuppression is one of the serious side effects of anti‐cancer chemotherapeutic drugs that deteriorate the bodily functions of patients, thereby affecting the quality of life considerably. Prevention of myelosuppression in anti‐cancer chemotherapy is an important research topic. A stabilized chemotherapy‐induced myelosuppression animal model is necessary in experimental research. This study aimed to establish an optimized animal model of chemotherapy‐induced bone marrow suppression. After C57BL/6 mice were treated with intermediate‐ and high‐dose (25/50 mg/kg) cyclophosphamide (CTX) for 10 days, the body weight, changes of thymus and spleen, number of white blood cells (WBCs), red blood cells (RBCs), and platelets (PLTs) and changes of bone marrow in the mice were systematically evaluated at the next 2, 7 and 14 days. Our results demonstrated that CTX treatments could significantly decrease the body weight of mice, as well as the ratios of the weights of thymus and spleen to body weight. The physiological structures of thymus and spleen were destroyed by CTX treatments. The number of WBCs and RBCs significantly declined after CTX treatments; however, the number of PLTs increased. Moreover, the expression of Sca1 in bone marrow cells decreased on day 2 but increased on day 14. The expression of CD34 decreased in bone marrow cells after CTX treatments. In conclusion, mice models, with high‐dose CTX treatments for 10 days, can be an optimized animal model for chemotherapy‐induced bone marrow suppression.This article is protected by copyright. All rights reserved.
      PubDate: 2016-05-27T04:21:06.025266-05:
      DOI: 10.1111/bcpt.12600
  • Effects of Osteoporosis‐Inducing Drugs on Vitamin D‐Related Gene
           Transcription and Mineralization in MG‐63 and Saos‐2 Cells
    • Authors: Christine Wegler; Kjell Wikvall, Maria Norlin
      First page: 436
      Abstract: Vitamin D3 is important for calcium and phosphate homeostasis. To exert its effects, vitamin D3 has to be enzymatically activated into 1,25D3 (1,25‐dihydroxyvitamin D3). Regulation by endogenous vitamin D metabolites of the activation and inactivation of 1,25D3 is important to maintain adequate amounts of active vitamin D3. Vitamin D deficiency and low bone mineral density have been linked to treatments with antiretroviral drugs and glucocorticoids. However, the causes of drug‐induced osteoporosis remain unclear. The antiretroviral drugs efavirenz and ritonavir as well as the glucocorticoid dexamethasone were included in this study. Their effects on transcription of vitamin D‐regulating enzymes in MG‐63 cells were investigated. Ritonavir and dexamethasone both induced transcription of CYP27B1, the enzyme responsible for formation of 1,25D3. Efavirenz, however, suppressed CYP27B1 expression. When administered together with endogenous vitamin D metabolites, dexamethasone and efavirenz counteracted the 1,25D3‐mediated up‐regulation of CYP24A1, which inactivates 1,25D3. This suggests that the drugs may interfere with local regulation of the vitamin D metabolizing system in osteoblasts. Studies on mineralization were performed in MG‐63 cells and Saos‐2 cells by measuring calcium concentrations accumulated over time. The effects of efavirenz, ritonavir and dexamethasone and/or vitamin D metabolites were examined. 1,25D3 induced mineralization in both cell lines. Efavirenz administered alone did not affect mineralization but abrogated the inducing effects of 1,25D3 on mineralization in both MG‐63 cells and Saos‐2 cells. In summary, the results suggest that antiretroviral drugs and glucocorticoids may adversely affect bone by interference with the vitamin D‐system in osteoblasts.This article is protected by copyright. All rights reserved.
      PubDate: 2016-05-20T02:01:51.932066-05:
      DOI: 10.1111/bcpt.12612
  • Daunorubicin Down‐Regulates the Expression of Stem Cell Markers and
           Factors Involved in Stem Cell Migration and Homing in Rat Heart in
           Subchronic but not Acute Cardiomyopathy
    • Authors: Jasna Srankova; Gabriel Doka, Lenka Pivackova, Lucia Mesarosova, Jan Kyselovic, Jan Klimas, Peter Krenek
      First page: 443
      Abstract: We tested the hypothesis that daunorubicin (DAU) cardiotoxicity alters expression of cytokines involved in stem cell migration and homing. Male Wistar rats were treated with daunorubicin to induce acute DAU cardiomyopathy (6x3 mg/kg, i.p., every 48 hr, DAU‐A) or subchronic DAU cardiomyopathy (15 mg/kg, i.v., DAU‐C). The left ventricle was catheterized. The animals were killed 48 hr (DAU‐A) and 8 weeks (DAU‐C) after the last dose of DAU. Expression of foetal genes (Nppa, Nppb), isomyosins (Myh6, Myh7), sources of oxidative stress (Abcb8, gp91phox), cytokines (Sdf‐1, Cxcr4, Scf, Vegf, Hgf, Igf‐1), markers of cardiac progenitor (c‐kit, Atnx‐1), endothelial progenitor (CD34, CD133) and mesenchymal (CD44, CD105) stem cells were determined by qRT‐PCR in left ventricular tissue. Reduced body weight, decreased left ventricular weight and function, elevated Nppa, Nppb, Myh7 were observed in both models. Myh6 decreased only in DAU‐C, which had a 35% mortality. Up‐regulated gp91phox and down‐regulated Abcb8 in DAU were present only in DAU‐C where we observed markedly decreased expressions of Scf and Vegf as well as expressions of stem cell markers. Down‐regulation of cytokines and stem cell markers may reflect impaired chemotaxis, migration and homing of stem cells and tissue repair in the heart in subchronic but not acute model of DAU cardiomyopathy.This article is protected by copyright. All rights reserved.
      PubDate: 2016-05-20T01:50:52.306419-05:
      DOI: 10.1111/bcpt.12606
  • Neutrophil Recruitment and Articular Hyperalgesia in Antigen‐Induced
           Arthritis is Modulated by the Cholinergic Anti‐Inflammatory Pathway
    • Authors: Alexandre Kanashiro; Jhimmy Talbot, Raphael S. Peres, Larissa G. Pinto, Gabriel S. Bassi, Thiago M. Cunha, Fernando Q. Cunha
      First page: 453
      Abstract: The cholinergic anti‐inflammatory pathway (CAP) is a complex neuroimmune mechanism triggered by the central nervous system to regulate peripheral inflammatory responses. Understanding the role of CAP in the pathogenesis of rheumatoid arthritis (RA) could help develop new therapeutic strategies for this disease. Therefore, we investigated the participation of this neuro‐immune pathway on the progression of experimental arthritis. Using an antigen‐induced arthritis (AIA) model, we investigated in mice the effects of vagotomy or the pharmacological treatments with hexamethonium (peripheral nicotinic receptor antagonist), methyl‐atropine (peripheral muscarinic receptor antagonist) or neostigmine (peripheral acetylcholinesterase inhibitor) on AIA progression. Unilateral cervical vagotomy was performed one week before the immunization protocol with methylated bovine serum albumin (mBSA), while drug administration was conducted during the period of immunization. On day 21, 6 hr after the challenge with mBSA injection in the femur‐tibial joint, the local neutrophil migration and articular mechanical hyperalgesia were assessed. Herein, we observed that vagotomy or blockade of peripheral nicotinic (but not muscarinic) receptors exacerbated the clinical parameters of this disease. Moreover, peripheral acetylcholinesterase inhibition by neostigmine‐treatment promoted a reduction of neutrophil recruitment in the knee joint and articular hyperalgesia. Our results demonstrated that peripheral activation of CAP modulates experimental arthritis providing a preclinical evidence of a potential therapeutic strategy for RA.This article is protected by copyright. All rights reserved.
      PubDate: 2016-05-20T01:25:32.431671-05:
      DOI: 10.1111/bcpt.12611
  • Effects of an Antimutagenic 1,4‐Dihydropyridine AV‐153 on Expression
           of Nitric Oxide Synthases and DNA Repair‐related Enzymes and Genes in
           Kidneys of Rats with a Streptozotocin Model of Diabetes Mellitus
    • Authors: Kristīne Ošiņa; Evita Rostoka, Sergejs Isajevs, Jelizaveta Sokolovska, Tatjana Sjakste, Nikolajs Sjakste
      First page: 458
      Abstract: Development of complications of diabetes mellitus (DM), including diabetic nephropathy, is a complex multi‐stage process, dependent on many factors including modification of nitric oxide (NO) production and impaired DNA repair. The goal of the present work was to study in vivo effects of a 1,4‐dihydropyridine AV‐153, known as antimutagene and DNA‐binder, on expression of several genes and proteins involved in NO metabolism and DNA repair in kidneys of rats with streptozotocin (STZ)‐induced model of DM. Transcription intensity was monitored by means of real‐time RT‐PCR and expression of proteins by immunohistochemistry. Development of DM significantly induced PARP1 protein expression, while AV‐153 (0.5 mg/kg) administration decreased it. AV‐153 increased expression of Parp1 gene in kidneys of both intact and diabetic animals. Expression of H2afx mRNA and γH2AX histone protein, a marker of DNA breakage, was not changed in diabetic animals, but AV‐153 up‐regulated expression of the gene without any impact on the protein expression. Development of DM was followed by a significant increase of iNOS enzyme expression, while AV‐153 down‐regulated the enzyme expression up to normal levels. iNos gene expression was also increased in diabetic animals, but unlike the protein, the expression of mRNA was enhanced by AV‐153 administration. Expression of both eNOS protein and eNos gene in kidneys was down‐regulated, and administration of AV‐153 normalized the expression level. Effects of the compound in kidneys of diabetic animals appear to be beneficial, as a trend for normalization of expression of NO synthases is observed.This article is protected by copyright. All rights reserved.
      PubDate: 2016-05-30T23:55:32.933678-05:
      DOI: 10.1111/bcpt.12617
  • The First Decade with the Swedish Prescribed Drug Register – A
           Systematic Review of the Output in the Scientific Literature
    • Authors: Susanna M. Wallerstedt; Björn Wettermark, Mikael Hoffmann
      First page: 464
      Abstract: The aim of this study was to quantify and characterize the scientific output from the Swedish Prescribed Drug Register (SPDR) the first decade after its establishment. A systematic literature search was performed in Medline, EMBASE and PubMed (2005‐2014). Additional publications were identified by personal knowledge, reference lists, contact with active authors and a citation search in Web of Sciences. Publications using SPDR data were included in the analysis and characterized regarding study type, presence of patient‐level record‐linkage, target population and topic. A total of 719 publications were identified in the literature search and an additional 148 by other strategies. 338 studies fulfilled the inclusion criteria. The majority were analytic (n=166; 49.1%) or descriptive (n=100; 29.5%). The remaining studies focused on validation (n=20; 5.9%), health economics (n=16; 4.7%) or miscellaneous (n=36; 10.7%). The analytic studies investigating effects of drug exposure focused mainly on safety (n=46) and/or effectiveness (n=23). The first publications appeared in 2007 (n=6), and in 2014, 90 articles using SPDR were published. Over the years, linkage with other registers using the personal identity number increased (0% to 88.9% of the publications). The population was often selected by age (49.7%), condition (45.0%) and/or drug (22.8%) and concerned predominantly psychiatric (29.0%) and cardiovascular (20.4%) diseases. In conclusion, the present study illustrates that the establishment of a nationwide individual‐based register on dispensed prescription drugs facilitates an encouraging development of pharmacoepidemiological research, both regarding the number of publications and the scientific level of the analyses.This article is protected by copyright. All rights reserved.
      PubDate: 2016-05-24T23:05:29.705395-05:
      DOI: 10.1111/bcpt.12613
  • Impact of Ageing on Serum Concentrations of Risperidone and its Active
           Metabolite in Patients with known CYP2D6 Genotype
    • Authors: Espen Molden; Ragnhild Birkeland Waade, Maren Hoff, Tore Haslemo
      First page: 470
      Abstract: The aim of this study was to investigate the impact of ageing on serum concentrations of risperidone and 9‐hydroxyrisperidone in patients with known CYP2D6 genotype. We included retrospective therapeutic drug monitoring data from 464 genotyped patients with measured serum concentrations of risperidone and 9‐hydroxyrisperidone following oral administration. Patients were divided into two age subgroups, i.e. ≤65 (n=396) and >65 years (n=68), and dose‐adjusted concentrations (C:D ratios) were compared using multiple linear regression analyses with CYP2D6 genotype and gender as covariates. Moreover, absolute concentrations and prescribed daily doses were compared between age subgroups by simple, univariate Mann‐Whitney tests. Age had no effect on C:D ratio of risperidone (P>0.4), but C:D ratios of 9‐hydroxyrisperidone and risperidone + 9‐hydroxyrisperidone (total active moiety) were estimated to be 2.6‐ and 2.0‐fold higher in patients >65 versus ≤65 years (P65 years might be a particularly vulnerable subgroup of adverse effects.This article is protected by copyright. All rights reserved.
      PubDate: 2016-05-31T00:15:25.466732-05:
      DOI: 10.1111/bcpt.12614
  • Impact of implementing a protocol on the perioperative management in
           patients treated with anti‐thrombotics admitted for hip fracture
           surgery: an observational study
    • Authors: Luján Iavecchia; Ahmad Safiya, David Salat, Mònica Sabaté, Montse Bosch, Alfons Biarnés, Angels Camps, Dolors Castellà, Pilar Lalueza, Verònica Pons, Jordi Teixidor, Maria M. Villar, Antònia Agustí
      First page: 476
      Abstract: This study aimed to describe the impact of implementing a protocol on the perioperative management of patients admitted for hip fracture treated with anti‐thrombotics. A protocol was designed based on recommendations from the American College of Chest Physicians (ACCP). After its implementation (May 2012), information on anti‐thrombotic management was collected from admission to three months after surgery in retrospective (October 2011‐March 2012) and prospective (October 2012‐March 2013) cohorts. Patients’ thromboembolic risk was classified into high, moderate or low according to the ACCP categories. A total of 113 and 101 cases were included in the retrospective and prospective cohorts, respectively. No differences in age, gender, American Society of Anaesthesiology score or thrombotic risk categories were observed between cohorts. Most patients were treated with aspirin or triflusal (55.1 and 48.1% in each cohort, respectively), clopidogrel (24.5 and 26.6%) or acenocoumarol (16.3 and 20.2%). In moderate‐high thromboembolic risk patients, a higher rate of bridging therapy with full doses of enoxaparin (18.5% and 50%, p=0.04 before and 9.1% and 43.7%, p=0.02 after surgery) and a lower rate of aspirin discontinuation (76% and 55.3%, p=0.03) were observed in the prospective cohort. Both cohorts had a similar percentage of cases with bleeding (68.1 and 68.3%) and thrombotic events (11.5% and 13%). No differences in the timing between surgery and the discontinuation or resumption of anti‐thrombotics were noted. After protocol implementation, aspirin was less often stopped and bridging therapy with therapeutic doses of enoxaparin was used more often. However, interruption and resumption times of anti‐thrombotics remained almost unchanged. In order to achieve these goals, more efforts should be made to implement the protocol in clinical practice.This article is protected by copyright. All rights reserved.
      PubDate: 2016-05-25T03:55:35.587533-05:
      DOI: 10.1111/bcpt.12615
  • Evaluation of Polybrominated Diphenyl Ether Toxicity on HepG2 Cells ‐
           Hexa‐brominated Congener (BDE‐154) is Less Toxic than
           Tetra‐Brominated Congener (BDE‐47)
    • Authors: Alecsandra O. Souza; Maria J. Tasso, Alana M. C. Oliveira, Lilian C. Pereira, Filipe V. Duarte, Danielle P. Oliveira, Carlos M. Palmeira, Daniel J. Dorta
      First page: 485
      Abstract: Apoptotic cell death is one of the main consequences of exposure to brominated flame retardants, including PBDEs. However, few of these compounds have had their potential toxicity investigated. BDE‐154 is one of the most poorly studied PBDE congeners, but its level in the environment and in biological fluids is rising. In addition, its chemical structure differs from the other congeners with well‐documented toxicity, so BDE‐154 may display a distinct toxicity pattern. This study has evaluated how BDE‐154 affects the human hepatoblastoma cell line (HepG2) and has looked into the impact of this congener on human health. In addition, this study has related the effects of BDE‐154 with the effects of BDE‐47 to clarify the mechanism of PBDE toxicity. The HepG2 cell line was exposed to BDEs for 24 and 48 hr and submitted to assays to examine proliferation, viability, mitochondrial membrane potential, reactive oxygen species accumulation, phosphatidilseryne exposure, nuclear fragmentation and evaluation of pro‐caspase 3, pro‐caspase 9, cytochrome c release, and apoptosis inductor factor release by western blot analysis. BDE‐154 induced mitochondrial damage and led to apoptotic death of HepG2 cells, but these effects were less intense than the effects promoted by BDE‐47. Unlike other extensively reported congeners, BDE‐154 was only toxic at the higher tested concentrations, whereas BDE‐47 cytotoxicity was evident even at lower concentrations. Hence, like the toxicity pattern of other classes of substances such as polychlorinated biphenyls, the toxicity pattern of BDEs also depends on their chemical structure and aromatic substituent.This article is protected by copyright. All rights reserved.
      PubDate: 2016-06-12T22:41:46.199516-05:
      DOI: 10.1111/bcpt.12598
  • Placental Growth Factor (PLGF) Triggers EMT‐like Changes in Rat Type II
           Alveolar Epithelial Cells: Activation of NFκB Signalling Pathway
    • Authors: Liang Zhang; Shuang Zhao, Lijie Yuan, Hongmin Wu, Hong Jiang, Gang Luo
      First page: 498
      Abstract: Epithelial‐to‐mesenchymal transition (EMT) occurs frequently in lung epithelium in response to damage stimuli, such as inflammation and oxidative stress. Our group has already found an excessive release of placental growth factor (PLGF) in hyperoxic lung injury in newborn rodents. Nonetheless, whether this increased PLGF plays a role in mediating EMT process of alveolar epithelial cells (AECs) is unclear and requires further investigation. In this study, primary type II AECs were first isolated for neonatal Sprague‐Dawley (SD) rats and treated with different doses (25 or 100 ng/ml) of recombinant PLGF for 48 hr. As compared to the untreated AECs, exogenous PLGF induced a reduction of E‐cadherin (a critical epithelial maker) and increases of vimentin and fibronectin (mesenchymal markers) in a dose‐dependent manner. The higher dose was more potent in promoting the EMT‐like changes in AECs. We also found that PLGF promoted the degradation of nuclear factor κB (NFκB) inhibitor (IκBα), induced phosphorylation of NFκB p65 at Ser 536 and enhanced p65 nuclear translocation in primary AECs. In addition, the NFκB inhibitor BAY 11‐7082 partly counteracted PLGF‐induced alterations of EMT‐related proteins in rat AECs. In summary, our study demonstrates that exogenous PLGF can induce EMT‐like changes in type II AECs at least partly by activating NFκB signalling transduction in vitro. PLGF may play a role in driving fibrotic lesions, and thus can be a promising target for lung diseases.This article is protected by copyright. All rights reserved.
      PubDate: 2016-06-08T03:32:45.12425-05:0
      DOI: 10.1111/bcpt.12616
  • Human UDP‐Glucuronosyltransferases 1A1, 1A3, 1A9, 2B4 and 2B7 are
           Inhibited by Diethylstilbesterol
    • Authors: Liangliang Zhu; Ling Xiao, Wenjuan Li, Yuan Zhang, Wenwen Han, Yu Zhu, Guangbo Ge, Ling Yang
      First page: 505
      Abstract: Inhibition of UDP‐glucuronosyltransferases (UGT) can result in many undesired side effects. Diethylstilbestrol (DES), a synthetic oestrogen famous for its multiple toxicities, was once widely administered to women in high dosages and now still gains application in clinics. This study investigated in vitro inhibitory effects of DES on catalytic activities of human UGTs, aiming at disclosing new potential toxic mechanisms on the basis of interactions between DES and metabolizing enzymes. DES (10 μM) could decrease activities of UGT1A1, 1A3, 1A9, 2B4 and 2B7 in catalyzing 4‐Methylumbelliferon (4‐Mu) glucuronidation. Further kinetic analyses showed that inhibition of these UGTs followed competitive (UGT1A1 and 1A9), mixed (UGT1A3 and 2B4), and non‐competitive (UGT2B7) mechanisms, with Ki values ranging from 0.91 to 4.1 μM. The inhibition potentials of UGT1A9 and 2B7 in human liver microsomes (HLM) were further tested by employing propofol and zidovudine as probe substrates, respectively. The inhibition of human liver microsomal UGT1A9 followed mixed mechanism, with the Ki value of 3.5 μM and α of 4.1. On the other hand, DES displayed non‐competitive inhibition against UGT2B7 in HLM, with the Ki value of 9.8 μM. The risks of in vivo inhibition of human UGTs were also predicted by calculation of plasma C/Ki values. Results suggest that DES can trigger in vivo inhibition of UGT1A1, 1A3, 1A9, 2B4 and 2B7 after the intravenous administration in high doses.This article is protected by copyright. All rights reserved.
      PubDate: 2016-06-08T03:45:36.617614-05:
      DOI: 10.1111/bcpt.12618
  • Intravenous Lipid Emulsion as an Antidote for the Treatment of Acute
           Poisoning: A Bibliometric Analysis of Human and Animal Studies
    • Authors: Sa'ed H. Zyoud; W. Stephen Waring, Samah W. Al‐Jabi, Waleed M. Sweileh, Belal Rahhal, Rahmat Awang
      First page: 512
      Abstract: In recent years, there has been increasing interest in the role of intravenous lipid formulations as potential antidotes in patients with severe cardiotoxicity caused by drug toxicity. The aim of this study was to conduct a comprehensive bibliometric analysis of all human and animal studies featuring lipid emulsion as an antidote for the treatment of acute poisoning. The Scopus database search was performed on 5 February 2016 in order to analyse the research output related to intravenous lipid emulsion as an antidote for the treatment of acute poisoning. Research indicators used for analysis included total number of articles, date (year) of publication, total citations, value of the h‐index, document types, countries of publication, journal names, collaboration patterns and institutions. A total of 594 articles were retrieved from Scopus for the period of 1955‐2015. The percentage share of global intravenous lipid emulsion research output showed that research output was 85.86% in 2006–2015 with yearly average growth in this field of 51 articles per year. The USA, United Kingdom (UK), France, Canada, New Zealand, Germany, Australia, China, Turkey and Japan accounted for 449 (75.6%) of all the publications. The total number of citations for all documents was 9,333, with an average of 15.7 citations per document. The h‐index of the retrieved documents for lipid emulsion research as antidote for the treatment of acute poisoning was 49. The USA and the UK achieved the highest h‐indices, 34 and 14, respectively. New Zealand produced the greatest number of documents with international collaboration (51.9%) followed by Australia (50%) and Canada (41.4%) out of the total number of publications for each country. In summary, we found an increase in the number of publications in the field of lipid emulsion after 2006. The results of the current study demonstrate that the majority of publications in the field of lipid emulsion were published by high‐income countries. Researchers from institutions in the USA led scientific production on lipid emulsion research. There is an obvious need to promote a deeper engagement through international collaborative research projects and funding mechanisms.This article is protected by copyright. All rights reserved.
      PubDate: 2016-05-20T01:41:03.5664-05:00
      DOI: 10.1111/bcpt.12609
  • Corrigendum
    • Pages: 520 - 520
      PubDate: 2016-10-13T22:22:38.297606-05:
      DOI: 10.1111/bcpt.12676
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
Home (Search)
Subjects A-Z
Publishers A-Z
Your IP address:
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-2016