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Publisher: Elsevier   (Total: 3175 journals)

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Showing 1 - 200 of 3175 Journals sorted alphabetically
A Practical Logic of Cognitive Systems     Full-text available via subscription   (Followers: 9)
AASRI Procedia     Open Access   (Followers: 14)
Academic Pediatrics     Hybrid Journal   (Followers: 28, SJR: 1.402, h-index: 51)
Academic Radiology     Hybrid Journal   (Followers: 22, SJR: 1.008, h-index: 75)
Accident Analysis & Prevention     Partially Free   (Followers: 90, SJR: 1.109, h-index: 94)
Accounting Forum     Hybrid Journal   (Followers: 25, SJR: 0.612, h-index: 27)
Accounting, Organizations and Society     Hybrid Journal   (Followers: 33, SJR: 2.515, h-index: 90)
Achievements in the Life Sciences     Open Access   (Followers: 5)
Acta Anaesthesiologica Taiwanica     Open Access   (Followers: 6, SJR: 0.338, h-index: 19)
Acta Astronautica     Hybrid Journal   (Followers: 379, SJR: 0.726, h-index: 43)
Acta Automatica Sinica     Full-text available via subscription   (Followers: 2)
Acta Biomaterialia     Hybrid Journal   (Followers: 27, SJR: 2.02, h-index: 104)
Acta Colombiana de Cuidado Intensivo     Full-text available via subscription   (Followers: 2)
Acta de Investigación Psicológica     Open Access   (Followers: 3)
Acta Ecologica Sinica     Open Access   (Followers: 8, SJR: 0.172, h-index: 29)
Acta Haematologica Polonica     Free   (Followers: 1, SJR: 0.123, h-index: 8)
Acta Histochemica     Hybrid Journal   (Followers: 3, SJR: 0.604, h-index: 38)
Acta Materialia     Hybrid Journal   (Followers: 239, SJR: 3.683, h-index: 202)
Acta Mathematica Scientia     Full-text available via subscription   (Followers: 5, SJR: 0.615, h-index: 21)
Acta Mechanica Solida Sinica     Full-text available via subscription   (Followers: 9, SJR: 0.442, h-index: 21)
Acta Oecologica     Hybrid Journal   (Followers: 10, SJR: 0.915, h-index: 53)
Acta Otorrinolaringologica (English Edition)     Full-text available via subscription  
Acta Otorrinolaringológica Española     Full-text available via subscription   (Followers: 2, SJR: 0.311, h-index: 16)
Acta Pharmaceutica Sinica B     Open Access   (Followers: 1)
Acta Poética     Open Access   (Followers: 4)
Acta Psychologica     Hybrid Journal   (Followers: 25, SJR: 1.365, h-index: 73)
Acta Sociológica     Open Access  
Acta Tropica     Hybrid Journal   (Followers: 6, SJR: 1.059, h-index: 77)
Acta Urológica Portuguesa     Open Access  
Actas Dermo-Sifiliograficas     Full-text available via subscription   (Followers: 3)
Actas Dermo-Sifiliográficas (English Edition)     Full-text available via subscription   (Followers: 2)
Actas Urológicas Españolas     Full-text available via subscription   (Followers: 3, SJR: 0.383, h-index: 19)
Actas Urológicas Españolas (English Edition)     Full-text available via subscription   (Followers: 1)
Actualites Pharmaceutiques     Full-text available via subscription   (Followers: 6, SJR: 0.141, h-index: 3)
Actualites Pharmaceutiques Hospitalieres     Full-text available via subscription   (Followers: 3, SJR: 0.112, h-index: 2)
Acupuncture and Related Therapies     Hybrid Journal   (Followers: 6)
Acute Pain     Full-text available via subscription   (Followers: 14)
Ad Hoc Networks     Hybrid Journal   (Followers: 11, SJR: 0.967, h-index: 57)
Addictive Behaviors     Hybrid Journal   (Followers: 15, SJR: 1.514, h-index: 92)
Addictive Behaviors Reports     Open Access   (Followers: 7)
Additive Manufacturing     Hybrid Journal   (Followers: 9, SJR: 1.039, h-index: 5)
Additives for Polymers     Full-text available via subscription   (Followers: 22)
Advanced Cement Based Materials     Full-text available via subscription   (Followers: 3)
Advanced Drug Delivery Reviews     Hybrid Journal   (Followers: 130, SJR: 5.2, h-index: 222)
Advanced Engineering Informatics     Hybrid Journal   (Followers: 11, SJR: 1.265, h-index: 53)
Advanced Powder Technology     Hybrid Journal   (Followers: 16, SJR: 0.739, h-index: 33)
Advances in Accounting     Hybrid Journal   (Followers: 8, SJR: 0.299, h-index: 15)
Advances in Agronomy     Full-text available via subscription   (Followers: 12, SJR: 2.071, h-index: 82)
Advances in Anesthesia     Full-text available via subscription   (Followers: 27, SJR: 0.169, h-index: 4)
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 2)
Advances in Applied Mathematics     Full-text available via subscription   (Followers: 10, SJR: 1.054, h-index: 35)
Advances in Applied Mechanics     Full-text available via subscription   (Followers: 10, SJR: 0.801, h-index: 26)
Advances in Applied Microbiology     Full-text available via subscription   (Followers: 22, SJR: 1.286, h-index: 49)
Advances In Atomic, Molecular, and Optical Physics     Full-text available via subscription   (Followers: 14, SJR: 3.31, h-index: 42)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4, SJR: 2.277, h-index: 43)
Advances in Botanical Research     Full-text available via subscription   (Followers: 2, SJR: 0.619, h-index: 48)
Advances in Cancer Research     Full-text available via subscription   (Followers: 28, SJR: 2.215, h-index: 78)
Advances in Carbohydrate Chemistry and Biochemistry     Full-text available via subscription   (Followers: 7, SJR: 0.9, h-index: 30)
Advances in Catalysis     Full-text available via subscription   (Followers: 5, SJR: 2.139, h-index: 42)
Advances in Cell Aging and Gerontology     Full-text available via subscription   (Followers: 3)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 12)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 27, SJR: 0.183, h-index: 23)
Advances in Child Development and Behavior     Full-text available via subscription   (Followers: 10, SJR: 0.665, h-index: 29)
Advances in Chronic Kidney Disease     Full-text available via subscription   (Followers: 10, SJR: 1.268, h-index: 45)
Advances in Clinical Chemistry     Full-text available via subscription   (Followers: 28, SJR: 0.938, h-index: 33)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 19, SJR: 2.314, h-index: 130)
Advances in Computers     Full-text available via subscription   (Followers: 14, SJR: 0.223, h-index: 22)
Advances in Dermatology     Full-text available via subscription   (Followers: 14)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 10)
Advances in Digestive Medicine     Open Access   (Followers: 8)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 5)
Advances in Drug Research     Full-text available via subscription   (Followers: 21)
Advances in Ecological Research     Full-text available via subscription   (Followers: 42, SJR: 3.25, h-index: 43)
Advances in Engineering Software     Hybrid Journal   (Followers: 27, SJR: 0.486, h-index: 10)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 6)
Advances in Experimental Social Psychology     Full-text available via subscription   (Followers: 42, SJR: 5.465, h-index: 64)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 1)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 7)
Advances in Food and Nutrition Research     Full-text available via subscription   (Followers: 54, SJR: 0.674, h-index: 38)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 15)
Advances in Genetics     Full-text available via subscription   (Followers: 14, SJR: 2.558, h-index: 54)
Advances in Genome Biology     Full-text available via subscription   (Followers: 7)
Advances in Geophysics     Full-text available via subscription   (Followers: 6, SJR: 2.325, h-index: 20)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 21, SJR: 0.906, h-index: 24)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 9, SJR: 0.497, h-index: 31)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 23)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 1, SJR: 0.396, h-index: 27)
Advances in Immunology     Full-text available via subscription   (Followers: 36, SJR: 4.152, h-index: 85)
Advances in Inorganic Chemistry     Full-text available via subscription   (Followers: 8, SJR: 1.132, h-index: 42)
Advances in Insect Physiology     Full-text available via subscription   (Followers: 2, SJR: 1.274, h-index: 27)
Advances in Integrative Medicine     Hybrid Journal   (Followers: 6)
Advances in Intl. Accounting     Full-text available via subscription   (Followers: 3)
Advances in Life Course Research     Hybrid Journal   (Followers: 8, SJR: 0.764, h-index: 15)
Advances in Lipobiology     Full-text available via subscription   (Followers: 1)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Marine Biology     Full-text available via subscription   (Followers: 14, SJR: 1.645, h-index: 45)
Advances in Mathematics     Full-text available via subscription   (Followers: 10, SJR: 3.261, h-index: 65)
Advances in Medical Sciences     Hybrid Journal   (Followers: 6, SJR: 0.489, h-index: 25)
Advances in Medicinal Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Microbial Physiology     Full-text available via subscription   (Followers: 4, SJR: 1.44, h-index: 51)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 21)
Advances in Molecular and Cellular Endocrinology     Full-text available via subscription   (Followers: 8)
Advances in Molecular Toxicology     Full-text available via subscription   (Followers: 7, SJR: 0.324, h-index: 8)
Advances in Nanoporous Materials     Full-text available via subscription   (Followers: 3)
Advances in Oncobiology     Full-text available via subscription   (Followers: 1)
Advances in Organ Biology     Full-text available via subscription   (Followers: 1)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 15, SJR: 2.885, h-index: 45)
Advances in Parallel Computing     Full-text available via subscription   (Followers: 6, SJR: 0.148, h-index: 11)
Advances in Parasitology     Full-text available via subscription   (Followers: 5, SJR: 2.37, h-index: 73)
Advances in Pediatrics     Full-text available via subscription   (Followers: 24, SJR: 0.4, h-index: 28)
Advances in Pharmaceutical Sciences     Full-text available via subscription   (Followers: 10)
Advances in Pharmacology     Full-text available via subscription   (Followers: 15, SJR: 1.718, h-index: 58)
Advances in Physical Organic Chemistry     Full-text available via subscription   (Followers: 8, SJR: 0.384, h-index: 26)
Advances in Phytomedicine     Full-text available via subscription  
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3, SJR: 0.248, h-index: 11)
Advances in Plant Biochemistry and Molecular Biology     Full-text available via subscription   (Followers: 7)
Advances in Plant Pathology     Full-text available via subscription   (Followers: 5)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 17)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 18, SJR: 1.5, h-index: 62)
Advances in Psychology     Full-text available via subscription   (Followers: 59)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 6, SJR: 0.478, h-index: 32)
Advances in Radiation Oncology     Open Access  
Advances in Small Animal Medicine and Surgery     Hybrid Journal   (Followers: 3, SJR: 0.1, h-index: 2)
Advances in Space Biology and Medicine     Full-text available via subscription   (Followers: 5)
Advances in Space Research     Full-text available via subscription   (Followers: 377, SJR: 0.606, h-index: 65)
Advances in Structural Biology     Full-text available via subscription   (Followers: 5)
Advances in Surgery     Full-text available via subscription   (Followers: 9, SJR: 0.823, h-index: 27)
Advances in the Study of Behavior     Full-text available via subscription   (Followers: 29, SJR: 1.321, h-index: 56)
Advances in Veterinary Medicine     Full-text available via subscription   (Followers: 17)
Advances in Veterinary Science and Comparative Medicine     Full-text available via subscription   (Followers: 13)
Advances in Virus Research     Full-text available via subscription   (Followers: 5, SJR: 1.878, h-index: 68)
Advances in Water Resources     Hybrid Journal   (Followers: 46, SJR: 2.408, h-index: 94)
Aeolian Research     Hybrid Journal   (Followers: 6, SJR: 0.973, h-index: 22)
Aerospace Science and Technology     Hybrid Journal   (Followers: 335, SJR: 0.816, h-index: 49)
AEU - Intl. J. of Electronics and Communications     Hybrid Journal   (Followers: 8, SJR: 0.318, h-index: 36)
African J. of Emergency Medicine     Open Access   (Followers: 6, SJR: 0.344, h-index: 6)
Ageing Research Reviews     Hybrid Journal   (Followers: 9, SJR: 3.289, h-index: 78)
Aggression and Violent Behavior     Hybrid Journal   (Followers: 431, SJR: 1.385, h-index: 72)
Agri Gene     Hybrid Journal  
Agricultural and Forest Meteorology     Hybrid Journal   (Followers: 15, SJR: 2.18, h-index: 116)
Agricultural Systems     Hybrid Journal   (Followers: 31, SJR: 1.275, h-index: 74)
Agricultural Water Management     Hybrid Journal   (Followers: 43, SJR: 1.546, h-index: 79)
Agriculture and Agricultural Science Procedia     Open Access   (Followers: 1)
Agriculture and Natural Resources     Open Access   (Followers: 2)
Agriculture, Ecosystems & Environment     Hybrid Journal   (Followers: 56, SJR: 1.879, h-index: 120)
Ain Shams Engineering J.     Open Access   (Followers: 5, SJR: 0.434, h-index: 14)
Air Medical J.     Hybrid Journal   (Followers: 5, SJR: 0.234, h-index: 18)
AKCE Intl. J. of Graphs and Combinatorics     Open Access   (SJR: 0.285, h-index: 3)
Alcohol     Hybrid Journal   (Followers: 11, SJR: 0.922, h-index: 66)
Alcoholism and Drug Addiction     Open Access   (Followers: 9)
Alergologia Polska : Polish J. of Allergology     Full-text available via subscription   (Followers: 1)
Alexandria Engineering J.     Open Access   (Followers: 1, SJR: 0.436, h-index: 12)
Alexandria J. of Medicine     Open Access   (Followers: 1)
Algal Research     Partially Free   (Followers: 9, SJR: 2.05, h-index: 20)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 2)
Allergologia et Immunopathologia     Full-text available via subscription   (Followers: 1, SJR: 0.46, h-index: 29)
Allergology Intl.     Open Access   (Followers: 5, SJR: 0.776, h-index: 35)
Alpha Omegan     Full-text available via subscription   (SJR: 0.121, h-index: 9)
ALTER - European J. of Disability Research / Revue Européenne de Recherche sur le Handicap     Full-text available via subscription   (Followers: 9, SJR: 0.158, h-index: 9)
Alzheimer's & Dementia     Hybrid Journal   (Followers: 48, SJR: 4.289, h-index: 64)
Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring     Open Access   (Followers: 4)
Alzheimer's & Dementia: Translational Research & Clinical Interventions     Open Access   (Followers: 4)
Ambulatory Pediatrics     Hybrid Journal   (Followers: 6)
American Heart J.     Hybrid Journal   (Followers: 50, SJR: 3.157, h-index: 153)
American J. of Cardiology     Hybrid Journal   (Followers: 50, SJR: 2.063, h-index: 186)
American J. of Emergency Medicine     Hybrid Journal   (Followers: 42, SJR: 0.574, h-index: 65)
American J. of Geriatric Pharmacotherapy     Full-text available via subscription   (Followers: 10, SJR: 1.091, h-index: 45)
American J. of Geriatric Psychiatry     Hybrid Journal   (Followers: 14, SJR: 1.653, h-index: 93)
American J. of Human Genetics     Hybrid Journal   (Followers: 31, SJR: 8.769, h-index: 256)
American J. of Infection Control     Hybrid Journal   (Followers: 26, SJR: 1.259, h-index: 81)
American J. of Kidney Diseases     Hybrid Journal   (Followers: 32, SJR: 2.313, h-index: 172)
American J. of Medicine     Hybrid Journal   (Followers: 42, SJR: 2.023, h-index: 189)
American J. of Medicine Supplements     Full-text available via subscription   (Followers: 3)
American J. of Obstetrics and Gynecology     Hybrid Journal   (Followers: 191, SJR: 2.255, h-index: 171)
American J. of Ophthalmology     Hybrid Journal   (Followers: 62, SJR: 2.803, h-index: 148)
American J. of Ophthalmology Case Reports     Open Access   (Followers: 6)
American J. of Orthodontics and Dentofacial Orthopedics     Full-text available via subscription   (Followers: 6, SJR: 1.249, h-index: 88)
American J. of Otolaryngology     Hybrid Journal   (Followers: 25, SJR: 0.59, h-index: 45)
American J. of Pathology     Hybrid Journal   (Followers: 27, SJR: 2.653, h-index: 228)
American J. of Preventive Medicine     Hybrid Journal   (Followers: 27, SJR: 2.764, h-index: 154)
American J. of Surgery     Hybrid Journal   (Followers: 37, SJR: 1.286, h-index: 125)
American J. of the Medical Sciences     Hybrid Journal   (Followers: 12, SJR: 0.653, h-index: 70)
Ampersand : An Intl. J. of General and Applied Linguistics     Open Access   (Followers: 6)
Anaerobe     Hybrid Journal   (Followers: 4, SJR: 1.066, h-index: 51)
Anaesthesia & Intensive Care Medicine     Full-text available via subscription   (Followers: 61, SJR: 0.124, h-index: 9)
Anaesthesia Critical Care & Pain Medicine     Full-text available via subscription   (Followers: 14)
Anales de Cirugia Vascular     Full-text available via subscription  
Anales de Pediatría     Full-text available via subscription   (Followers: 2, SJR: 0.209, h-index: 27)
Anales de Pediatría (English Edition)     Full-text available via subscription  
Anales de Pediatría Continuada     Full-text available via subscription   (SJR: 0.104, h-index: 3)
Analytic Methods in Accident Research     Hybrid Journal   (Followers: 4, SJR: 2.577, h-index: 7)
Analytica Chimica Acta     Hybrid Journal   (Followers: 39, SJR: 1.548, h-index: 152)
Analytical Biochemistry     Hybrid Journal   (Followers: 166, SJR: 0.725, h-index: 154)
Analytical Chemistry Research     Open Access   (Followers: 10, SJR: 0.18, h-index: 2)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 11)
Anesthésie & Réanimation     Full-text available via subscription   (Followers: 1)
Anesthesiology Clinics     Full-text available via subscription   (Followers: 22, SJR: 0.421, h-index: 40)
Angiología     Full-text available via subscription   (SJR: 0.124, h-index: 9)
Angiologia e Cirurgia Vascular     Open Access   (Followers: 1)

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Journal Cover Acta Histochemica
  [SJR: 0.604]   [H-I: 38]   [3 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0065-1281
   Published by Elsevier Homepage  [3175 journals]
  • Retraction notice to “CD133+/CD44+/Oct4+/Nestin+ stem-like cells
           isolated from Panc-1 cell line may contribute to multi-resistance and
           metastasis of pancreatic cancer” [Acta Histochemica 115 (2013)
           349–356]
    • Authors: Dongqing Wang; Haitao Zhu; Ying Zhu; Yanfang Liu; Huiling Shen; Ruigen Yin; Zhijian Zhang; Zhaoliang Su
      First page: 302
      Abstract: Publication date: April 2018
      Source:Acta Histochemica, Volume 120, Issue 3
      Author(s): Dongqing Wang, Haitao Zhu, Ying Zhu, Yanfang Liu, Huiling Shen, Ruigen Yin, Zhijian Zhang, Zhaoliang Su


      PubDate: 2018-04-11T10:02:04Z
      DOI: 10.1016/j.acthis.2018.03.005
       
  • Neuroprotective effects of quercetin 4’-O-β-d-diglucoside on human
           striatal precursor cells in nutrient deprivation condition
    • Authors: Erica Sarchielli; Annamaria Morelli; Giulia Guarnieri; Maria Iorizzi; Eleonora Sgambati
      Pages: 122 - 128
      Abstract: Publication date: February 2018
      Source:Acta Histochemica, Volume 120, Issue 2
      Author(s): Erica Sarchielli, Annamaria Morelli, Giulia Guarnieri, Maria Iorizzi, Eleonora Sgambati
      Several investigations have demonstrated neuroprotective effects of quercetin, a polyphenol widely present in nature, against neurotoxic chemicals, as well as in neuronal injury/neurodegenerative disease models. Most of these studies have been performed with quercetin aglycone and its metabolites, while scanty data are available on its glycosides. This study is aimed at investigating the neuroprotective effects of quercetin 3,4’-O-β-d-diglucoside (Q3,4’dG), isolated from the bulbs of the white cultivar (Allium cepa L.), using an in vitro model of human striatal precursor cells (HSPs), a primary culture isolated from the striatal primordium and previously characterized. To study the effect of Q3,4’dG on cell survival, HSPs were exposed to nutrient deprivation created by replacing culture medium with phosphate buffer saline (PBS). Our findings showed that Q3,4’dG treatment significantly promoted cell survival and strongly decreased apoptosis induced by nutrient deprivation, as evaluated by cell proliferation/death analyses. In addition, since the adhesive capacities of cells are essential for cell survival, the expression of some adhesion molecules, such as pancadherin and focal adhesion kinase, was evaluated. Interestingly, PBS exposure significantly decreased the expression of both molecules, while in the presence of Q3,4’dG this effect was prevented. This study provides evidence of a neuroprotective role exerted by Q3,4’dG and suggests its possible implication in sustaining neuronal survival for prevention and treatment of neurodegenerative disorders.
      Graphical abstract image

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.01.003
       
  • Histological and morphofunctional parameters of the
           hypothalamic–pituitary–adrenal system are sensitive to daidzein
           treatment in the adult rat
    • Authors: Svetlana Trifunović; Milica Manojlović-Stojanoski; Nataša Nestorović; Nataša Ristić; Branka Šošić-Jurjević; Lazo Pendovski; Verica Milošević
      Pages: 129 - 135
      Abstract: Publication date: February 2018
      Source:Acta Histochemica, Volume 120, Issue 2
      Author(s): Svetlana Trifunović, Milica Manojlović-Stojanoski, Nataša Nestorović, Nataša Ristić, Branka Šošić-Jurjević, Lazo Pendovski, Verica Milošević
      The isoflavone, daidzein is a biologically active, plant-derived compound that interacts with estrogen receptors. Data from previous studies have suggested that daidzein exerts beneficial effects in many diseases; however, as an endocrine disrupter, it may also alter the functioning of the endocrine system. Data regarding the effect of daidzein on the morphofunctional and histological parameters of the hypothalamic–pituitary–adrenal (HPA) system is still lacking. Therefore, using the newCAST stereological software, we investigated the effects of chronic (21 days) daidzein treatment on corticotropin-releasing hormone (CRH) neurons within the hypothalamus and corticotropes (ACTH cells) in the pituitary, while image analysis was employed to-examine the intensity of fluorescence of CRH in the median eminence (ME) and adrenocorticotropin hormone in the pituitary in adult orchidectomized (Ovx) rats. Circulating ACTH and corticosterone levels were also analyzed. This study showed that daidzein treatment decreased the volume density of CRH neurons within the paraventricular nucleus as well as CRH immunofluorescence in the ME. The total number of ACTH cells was decreased, while ACTH cell volume and the intensity of ACTH fluorescence were increased following daidzein treatment. Both ACTH and corticosterone blood levels were increased after daidzein administration. The results of performed experiments clearly demonstrate that volume density of CRH neurons; total number and volume of ACTH cells, as well as stress hormones levels are vulnerable to the effects of daidzein.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2017.12.006
       
  • In situ analysis of gelatinolytic activity in human dentin
    • Authors: Thiago Henrique Scarabello Stape; Leo Tjäderhane; Arzu Tezvergil-Mutluay; Wagner Gomes Da Silva; Alan Roger dos Santos Silva; Wander José da Silva; Marcelo Rocha Marques
      Pages: 136 - 141
      Abstract: Publication date: February 2018
      Source:Acta Histochemica, Volume 120, Issue 2
      Author(s): Thiago Henrique Scarabello Stape, Leo Tjäderhane, Arzu Tezvergil-Mutluay, Wagner Gomes Da Silva, Alan Roger dos Santos Silva, Wander José da Silva, Marcelo Rocha Marques
      Matrix metalloproteinases (MMPs) such as gelatinases are differentially expressed in human tissues. These enzymes cleave specific substrates involved in cell signaling, tissue development and remodeling and tissue breakdown. Recent evidences show that gelatinases are crucial for normal dentin development and their activity is maintained throughout the entire tooth function in the oral cavity. Due to the lack of information about the exact location and activity of gelatinases in mature human dentin, the present study was designed to examine gelatinolytic levels in sound dentin. In situ zymography using confocal microscopy was performed on both mineralized and demineralized dentin samples. Sites presenting gelatinase activity were identified throughout the entire biological tissue pursuing different gelatinolytic levels for distinct areas: predentin and dentinal tubule regions presented higher gelatinolytic activity compared to intertubular dentin. Dentin regions with higher gelatinolytic activity immunohistochemically were partially correlated with MMP-2 expression. The maintenance of gelatinolytic activity in mature dentin may have biological implications related to biomineralization of predentin and tubular/peritubular dentinal regions, as well as regulation of defensive mechanisms of the dentin-pulp complex.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2017.12.008
       
  • Synergistic anti-proliferative effects of mTOR and MEK inhibitors in
           high-grade chondrosarcoma cell line OUMS-27
    • Authors: Singo Fukumoto; Kiyoto Kanbara; Masashi Neo
      Pages: 142 - 150
      Abstract: Publication date: February 2018
      Source:Acta Histochemica, Volume 120, Issue 2
      Author(s): Singo Fukumoto, Kiyoto Kanbara, Masashi Neo
      Chondrosarcoma is a malignant bone tumor that produces cartilaginous neoplastic tissue. Owing to the absence of an effective adjuvant therapy, high-grade chondrosarcoma has a poor prognosis. Therefore, it is important to develop an effective adjuvant therapy to prevent the recurrence and metastasis. Mammalian target of rapamycin (mTOR), a central regulator of cell growth, metabolism, proliferation, and survival, is considered an important target for anticancer drug development. The mitogen activated protein kinase (MAPK) pathway is another highly implicated cellular pathway in cancer and is thought to have compensatory effects in response to the inhibition of the phosphatidylinositol-3-kinase (PI3K)/Akt/mTOR signaling pathway. We investigated the mechanism of anti-proliferative effect of the mTOR inhibitor rapamycin and MAPK/ERK (MEK) inhibitor PD 0325901, and the combined effect of rapamycin and PD 0325901 on human chondrosarcoma cell line (OUMS-27). Combination therapy with rapamycin and PD 0325901 showed a stronger anti-proliferative effect on OUMS-27 cells than rapamycin monotherapy. We confirmed that the dual inhibition of the PI3K/Akt/mTOR and RAF/MEK/ERK signaling pathways had synergistic anti-proliferative effects in OUMS-27. Our results suggest that combination therapy of mTOR and MEK inhibitor could be an effective therapeutic approach against chondrosarcoma.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.01.002
       
  • Immunohistochemical localization of angiotensin AT1 receptors in the rat
           carotid body
    • Authors: Dimitrinka Y. Atanasova; Angel D. Dandov; Nikolay D. Dimitrov; Nikolai E. Lazarov
      Pages: 154 - 158
      Abstract: Publication date: February 2018
      Source:Acta Histochemica, Volume 120, Issue 2
      Author(s): Dimitrinka Y. Atanasova, Angel D. Dandov, Nikolay D. Dimitrov, Nikolai E. Lazarov
      The carotid body (CB) is a major peripheral arterial chemoreceptor that initiates respiratory and cardiovascular adjustments to maintain homeostasis. Recent evidence suggests that circulating or locally produced hormones like angiotensin II acting via AT1 receptors modulate its activity in a paracrine-autocrine manner. The aim of this study was to examine the immunohistochemical localization of AT1 receptor in the CB of adult rats and to compare its expression in vehicle-treated animals, and after the long-term application of its selective blocker losartan. Immunohistochemistry revealed that a subset of CB glomeruli and the vast majority of neurons in the adjacent superior cervical ganglion (SCG) were strongly AT1 receptor-immunoreactive. In the CB immunostaining was observed in the chemosensory glomus cells typically aggregated in cell clusters while the nerve fibers in-between and large capillaries around them were immunonegative. Exogenous administration of losartan for a prolonged time significantly reduces the intensity of AT1 receptor immunostaining in the CB glomus cells and SCG neurons. Our results show that AT1 receptors are largely expressed in the rat CB under physiological conditions, and their expression is down-regulated by losartan treatment.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.01.005
       
  • Immunomorphometric variations of sustentacular cells of the male viscacha
           adrenal medulla during the annual reproductive cycle. Effects of androgens
           and melatonin
    • Authors: Luis Ezequiel Gallol; Fabian Heber Mohamed
      Abstract: Publication date: Available online 5 April 2018
      Source:Acta Histochemica
      Author(s): Luis Ezequiel Gallol, Fabian Heber Mohamed
      The adrenal medulla is crucial for the survival of species facing significant environmental changes. The parenchyma is composed mainly of chromaffin cells, ganglion cells and sustentacular cells (SC). The male viscacha exhibits seasonal variations of gonadal activity and other metabolic functions. The aim of this work was to investigate the influence of the reproductive conditions on the morphology of SC of this rodent. In addition, the effects of testosterone and melatonin on these cells were studied. Immunoexpression of S100 protein, GFAP and vimentin were analyzed. Furthermore, the distribution of adrenergic and noradrenergic chromaffin cells subpopulations was studied for the first time in this species. SC present long cytoplasmic processes in contact with chromaffin cells, probably generating an intraglandular communication network. Significant differences (p < 0.05) in the %IA (percentage of immunopositive area) for the S100 protein were observed according to winter (4.21 ± 0.34) and summer (3.51 ± 0.15) values. In castrated animals, the %IA (6.05 ± 0.35) was significantly higher in relation to intact animals (3.95 ± 0.40). In melatonin-treated animals the %IA (3.62 ± 0.23) was significantly higher compared to control animals (2.65 ± 0.26). GFAP immunoexpression was negative and no noradrenergic chromaffin cells were detected suggesting an adrenergic phenotype predominance. Vimentin was observed in SC, endothelial cells and connective tissue. Results indicate that SC exhibit variations along the annual reproductive cycle, along with castration and the melatonin administration. Our results suggest that in this rodent SC are not only support elements, but also participate in the modulation of the activity of the adrenal medulla; probably through paracrine effects.

      PubDate: 2018-04-11T10:02:04Z
      DOI: 10.1016/j.acthis.2018.03.009
       
  • Early islets and mesenchyme from an injured adult pancreas improve
           syngeneic engraftments and islet graft function in diabetic rats
    • Authors: Venant Tchokonte-Nana; Juziel Kampando Manda
      Abstract: Publication date: Available online 3 April 2018
      Source:Acta Histochemica
      Author(s): Venant Tchokonte-Nana, Juziel Kampando Manda
      A decrease in mass of isografts and a decline in islet function are major challenges in islet transplantations. Despite this, transplantation of 84 h harvested pancreatic duct ligation (PDL) tissues have been shown to have the same functional ability to foetal pancreata, but there was only 40% success in reverting hyperglycaemia. We tested the potential of early islets with mesenchymal stromal cells (MSCs) to promote isogeneic grafts survival and to restore normoglycemia in diabetic rats, in comparison with late islets. Islets were isolated from injured adult pancreata of donor rats at 24 h post ligation either with MSCs (24 h islet/MSC+) or without MSCs (24 h islet/MSC-), and at 84 h without MSCs (84 h islet/MSC-). These cells were transplanted under the renal capsule of syngeneic STZ-diabetic recipient rats. The islet grafts were monitored using the BGLs of recipients and the immunohistomorphology of the grafts were analysed using anti-insulin and anti-Ki67 antibodies. The mean BGL in 24 h islet/MSC+ recipients was reduced over time toward the control value. The curves of the mean BGLs in the control islet/MSC- and the 24 h islet/MSC- recipients dropped significantly below the control normal glucose group’s levels to reach their nadirs on weeks 4 and 6, respectively. Both curves had a peak overshoot on week 9, with no statistical significant difference between them. Engrafted islets were evident in these recipients, lasted for 5 and 6 weeks and correspondingly survived failure. However, insulin+ cells were present in the isografts of all recipients; but, only isografts in the 24 h islet/MSC+ presented with a homogenous subcapsular beta cell mass. In addition, the tendency of 24 h islet/MSC- to restore normoglycaemia with its survival capacity was statistically highly significant compared to the 84 islet/MSC- recipients (80%; 20%; p = 0.001). Transplantation of early islets with MSCs from injured adult pancreata prolongs islet graft survival and improves isograft function in diabetic rats. This novel observation requires much further exploration for its clinical application, but this model already provides hope for new sources of donor islets for transplantation.

      PubDate: 2018-04-11T10:02:04Z
      DOI: 10.1016/j.acthis.2018.03.008
       
  • Current methodology of MTT assay in bacteria – A review
    • Authors: Ewa Grela; Joanna Kozłowska; Agnieszka Grabowiecka
      Abstract: Publication date: Available online 30 March 2018
      Source:Acta Histochemica
      Author(s): Ewa Grela, Joanna Kozłowska, Agnieszka Grabowiecka
      The MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) tetrazolium assay is a popular tool in estimating the metabolic activity of living cells. The test is based on enzymatic reduction of the lightly colored tetrazolium salt to its formazan of intense purple-blue color, which can be quantified spectrophotometrically. Under properly optimized conditions the obtained absorbance value is directly proportional to the number of living cells. Originally, the MTT assay was devised for use in eukaryotic cells lines and later applied for bacteria and fungi. As the mechanism of MTT reduction was studied in detail mostly considering eukaryotic cells, the lack of information resulted in generating a vast variety of MTT based protocols for bacterial enzymatic activity evaluation. In the presented article the main aspects of the MTT assay applicability in bacterial research were summarized, with special emphasis on sources of inaccuracies and misinterpretation of the test results.

      PubDate: 2018-04-11T10:02:04Z
      DOI: 10.1016/j.acthis.2018.03.007
       
  • Histomorphological changes in the pancreas and kidney and
           histopathological changes in the liver in male Wistar rats on
           antiretroviral therapy and melatonin treatment
    • Authors: Danélle Truter; Nireshni Chellan; Hans Strijdom; Ingrid Webster; Jordyn Rawstorne; Sanet H. Kotzé
      Abstract: Publication date: Available online 28 March 2018
      Source:Acta Histochemica
      Author(s): Danélle Truter, Nireshni Chellan, Hans Strijdom, Ingrid Webster, Jordyn Rawstorne, Sanet H. Kotzé
      Combination antiretroviral therapy (cART) has shown to cause inflammation, cellular injury and oxidative stress, whereas melatonin has been successful in reducing these effects. The aim of the study was to determine potential morphometric changes caused by cART in combination with melatonin supplementation in human immunodeficiency virus (HIV)-free rats. Tissue samples (N = 40) of the pancreas, liver and kidney from a control (C/ART-/M-), cART group (C/ART + ), melatonin (C/M + ) and experimental group (ART+/M + ) were collected and stained with haematoxylin and eosin (H&E) and evaluated for histopathology. The pancreata were labelled with anti-insulin and anti-glucagon to determine α- and β-cell regions. Kidneys were stained with periodic acid Schiff (PAS) to measure the area, perimeter, diameter and radius of renal corpuscles, glomeruli and proximal convoluted tubules (PCTs). Blood tests were conducted to determine hepatotoxicity. No significant changes in histopathology were seen. Melatonin stimulated pancreatic islet abundance, as the number of islets per mm2 was significantly higher in the C/M+ than in the C/ART-/M- and ART+/M+. Parameters of the renal corpuscle, glomeruli, renal space and PCTs were significantly lower in the C/ART+ compared to the other groups, thus cART may have caused tubular dysfunction or cellular damage. A significant increase in serum haemoglobin was observed in the C/ART+ compared to the C/ART-, which showed cART increases serum haemoglobin in the absence of immune deficiency. Serum lipids were significantly decreased in the C/M+ compared to the C/ART-, possibly due to the effect of melatonin on the decrease of lipolysis, decreasing effect on cholesterol absorption and stimulation of lipoprotein lipase (LPL) activity. In conclusion, we have demonstrated that melatonin stimulated α-cell production, increased the number of pancreatic islets and caused a decrease in total lipids, whereas cART increased serum haemoglobin and decreased various parameters of the nephron in an HIV-free rat model, suggestive of tubular dysfunction.

      PubDate: 2018-04-11T10:02:04Z
      DOI: 10.1016/j.acthis.2018.03.006
       
  • Gypenosides attenuate lipopolysaccharide-induced optic neuritis in rats
    • Authors: Fang Wang; Yalong Dang; Jing Wang; Ting Zhou; Yu Zhu
      Abstract: Publication date: Available online 17 March 2018
      Source:Acta Histochemica
      Author(s): Fang Wang, Yalong Dang, Jing Wang, Ting Zhou, Yu Zhu
      Purpose To evaluate the effect of gypenosides (GPs) on lipopolysaccharide (LPS)-induced optic neuritis rats. Methods Optic neuritis was induced by a single microinjection of LPS into the optic nerve of Sprague Dawley rats. GPs (400 mg/kg) was administrated by gavage for 21 days. The optic nerve structure changes and demyelination were observed after hematoxylin & eosin and Luxol-fast blue staining. Apoptosis of retinal ganglion cells (RGCs) was evaluated using Brn3a-TUNEL double staining. Expression of CD68 and glial fibrillary acidic protein (GFAP) were detected using immunofluorescence staining. The mRNA levels of inflammatory factors were measured using quantitative real-time PCR. The protein expression levels in the signal transducer and activator of transcription (STAT) and nuclear factor-κB (NF-κB) pathways were detected using Western blot. Results GPs treatment prevented the optic nerve structure changes and demyelination in the rats with optic neuritis. GPs treatment downregulated LPS-induced overexpressions of CD68, GFAP and pro-inflammatory factors. GPs treatment inhibited STAT1 and 3 phosphorylation and NF-κB nuclear translocation in the optic nerve and retina of rats with optic neuritis. Conclusion GPs attenuate LPS-induced inflammation, demyelination and optic nerve damage which may be associated with the inhibition of the NF-κB and STAT pathways.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.03.003
       
  • Highly specific detection of muscarinic M3 receptor, G protein interaction
           and intracellular trafficking in human detrusor using Proximity Ligation
           Assay (PLA)
    • Authors: Mandy Berndt-Paetz; Luise Herbst; Annett Weimann; Andreas Gonsior; Jens-Uwe Stolzenburg; Jochen Neuhaus
      Abstract: Publication date: Available online 15 March 2018
      Source:Acta Histochemica
      Author(s): Mandy Berndt-Paetz, Luise Herbst, Annett Weimann, Andreas Gonsior, Jens-Uwe Stolzenburg, Jochen Neuhaus
      Purpose Muscarinic acetylcholine receptors (mAChRs) regulate a number of important physiological functions. Alteration of mAChR expression or function has been associated in the etiology of several pathologies including functional bladder disorders (e.g bladder pain syndrome/interstitial cystitis – BPS/IC). In a previous study we found specific mAChR expression patterns associated with BPS/IC, while correlation between protein and gene expression was lacking. Posttranslational regulatory mechanisms, e.g. altered intracellular receptor trafficking, could explain those differences. In addition, alternative G protein (GP) coupling could add to the pathophysiology via modulation of muscarinic signaling. In our proof-of-principle study, we addressed these questions in situ. We established PLA in combination with confocal laserscanning microscopy (CLSM) and 3D object reconstruction for highly specific detection and analysis of muscarinic 3 receptors (M3), G protein (GP) coupling and intracellular trafficking in human detrusor samples. Material and methods Paraffin sections of formalin-fixed bladder tissue (FFPE) of BPS/IC patients receiving transurethral biopsy were examined by Cy3-PLA for M3 expression, coupling of M3 to GPs (Gαq/11, Gαs, Gαi) and interaction of M3 with endocytic regulator proteins. Membranes were labeled with wheat germ agglutinin-Alexa Fluor®488, nuclei were stained with DAPI. Object density and co-localization were analyzed in 3D-reconstruction of high resolution confocal z-stacks. Results Confocal image stack processing resulted in well demarcated objects. Calculated receptor densities correlated significantly with existing confocal expression data, while significantly improved specificity of M3 detection by PLA was verified using bladder tissue samples from transgenic mice. 50–60% of the M3 receptor complexes were plasma membrane associated in human bladder detrusor. Application of PLA for M3 and GPs allowed visualization of M3-GP interactions and revealed individual GP-subtype coupling patterns. Detection of M3 interactions with endocytic trafficking proteins by PLA resulted in object sizes correlating with well-documented vesicle sizes of the endocytosis pathway. Conclusion PLA enabled highly specific detection of M3 receptor expression, demonstration of M3/GP differential coupling and intracellular M3 trafficking in human detrusor smooth muscle cells. This new approach minimized background fluorescence and antibody cross-reactions resulting from single antibody application, and enhanced specificity due to the use of two primary antibodies. Use of subcellular markers allowed visualization of subcellular receptor location. PLA/CLSM allows analyses of muscarinic “receptor – G protein – promiscuity” and intracellular trafficking even in bladder paraffin sections and may give new insights into the etiology and pathology of BPS/IC.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.03.004
       
  • Immunohistochemical localization of osteoblast activating peptide in the
           mouse kidney
    • Authors: Ahmed E. Noreldin; Yaser Hosny Ali Elewa; Yasuhiro Kon; Katsuhiko Warita; Yoshinao Z. Hosaka
      Abstract: Publication date: Available online 11 March 2018
      Source:Acta Histochemica
      Author(s): Ahmed E. Noreldin, Yaser Hosny Ali Elewa, Yasuhiro Kon, Katsuhiko Warita, Yoshinao Z. Hosaka
      Osteoblast activating peptide (OBAP) is a newly discovered peptide detected in the rat stomach, which has a major role in osteogenesis. Recently, we revealed its localization in the parietal cells of the rat stomach. There have been no data regarding OBAP expression in the kidney, despite its role in calcium reabsorption in renal tubules. The current study aimed to inspect the expression of OBAP in the kidney of twelve 10-week-old male C3H/HeNJc1 mice using immunohistochemistry, and immunoelectron microscopic localization. The immunohistochemical investigation revealed an OBAP positive reaction mainly in the medulla, which was stronger than the cortex of the kidney and was concentrated in the distal convoluted tubules (DCT), connecting tubules (CT), and the thick limbs of the loop of Henle (HL). Moreover, we clarified that the OBAP was co-distributed with ghrelin and calbindin (markers of the DCT). Interestingly, immunoelectron microscopy demonstrated that OBAP was concentrated in the mitochondrial inner membrane of the DCT and CT. Based on these results, it was concluded that the mitochondria of the DCT, CT, and HL of the mice kidney generate OBAP. Furthermore, our results suggest that OBAP might have a role in the regulation of calcium reabsorption by the renal tubule; however, further investigations are required to clarify this potential role.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.03.001
       
  • An immunohistochemical and ultrastructural analysis of the retina in
           tadalafil (Cialis) treated rats
    • Authors: Nahla Reda Sarhan; Nesreen Moustafa Omar
      Abstract: Publication date: Available online 9 March 2018
      Source:Acta Histochemica
      Author(s): Nahla Reda Sarhan, Nesreen Moustafa Omar
      Tadalafil (Cialis) is one of the most commonly used phosphodiesterase type5 (PDE5) inhibitors. This work aimed to analyze the histological and ultrastructural changes provoked by chronic tadalafil administration in the rat retina, correlate between such changes and PDE5 immunoexpression and to evaluate the possible reversibility of these changes. Thirty Sprague Dawley male rats were randomly distributed into 3 groups. Control group; given 1 ml distilled water daily for 6 weeks. Tadalafil group; given tadalafil in a daily dose of 2.6 mg/kg for 6 weeks. Withdrawal group; given tadalafil 2.6 mg/kg daily for 6 week followed by a withdrawal period of 4 weeks. Retinal specimens were prepared for histological, ultrastructural and immunohistochemical study using anti-PDE5 and anti-Bcl-2 antibodies. Morphometric and statistical studies were performed. Tadalafil group displayed a significant reduction in retinal thickness, diminished cell population of outer and inner nuclear layers, dilated blood capillaries and a significant decline in the number of ganglion cells. Significant reductions of both PDE5 and Bcl-2 immunoexpression were observed. At the ultrastructural level, the photoreceptors showed spacing of outer segments and disorganized membranous discs. Retinal neurons showed ultrastructural degenerative changes in the form of shrunken irregular nuclei, dilated rER, and disrupted mitochondria. Withdrawal group revealed preservation of histological structure and partial restoration of retinal thickness, retinal cells ultrastructure, and PDE5 and Bcl-2 immunoexpressions. In conclusion, chronic use of tadalafil could induce reversible apoptotic and degenerative changes in retinal neurons due to its inhibitory effect on PDE5 expression which affects the metabolism and viability of retinal cells.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.03.002
       
  • A novel surgical technique for a rat subcutaneous implantation of a tissue
           engineered scaffold
    • Authors: Reza Khorramirouz; Jason L. Go; Christopher Noble; Soumen Jana; Eva Maxson; Amir Lerman; Melissa D. Young
      Abstract: Publication date: Available online 5 March 2018
      Source:Acta Histochemica
      Author(s): Reza Khorramirouz, Jason L. Go, Christopher Noble, Soumen Jana, Eva Maxson, Amir Lerman, Melissa D. Young
      Objectives Subcutaneous implantations in small animal models are currently required for preclinical studies of acellular tissue to evaluate biocompatibility, including host recellularization and immunogenic reactivity. Methods Three rat subcutaneous implantation methods were evaluated in six Sprague Dawley rats. An acellular xenograft made from porcine pericardium was used as the tissue-scaffold. Three implantation methods were performed; 1) Suture method is where a tissue-scaffold was implanted by suturing its border to the external oblique muscle, 2) Control method is where a tissue-scaffold was implanted without any suturing or support, 3) Frame method is where a tissue-scaffold was attached to a circular frame composed of polycaprolactone (PCL) biomaterial and placed subcutaneously. After 1 and 4 weeks, tissue-scaffolds were explanted and evaluated by hematoxylin and eosin (H&E), Masson’s trichrome,Picrosirius Red, transmission electron microscopy (TEM), immunohistochemistry, and mechanical testing. Results Macroscopically, tissue-scaffold degradation with the suture method and tissue-scaffold folding with the control method were observed after 4 weeks. In comparison, the frame method demonstrated intact tissue scaffolds after 4 weeks. H&E staining showed progressive cell repopulation over the course of the experiment in all groups with acute and chronic inflammation observed in suture and control methods throughout the duration of the study. Immunohistochemistry quantification of CD3, CD 31, CD 34, CD 163, and αSMA showed a statistically significant differences between the suture, control and frame methods (P < 0.05) at both time points. The average tensile strength was 4.03 ± 0.49, 7.45 ± 0.49 and 5.72 ± 1.34 (MPa) after 1 week and 0.55 ± 0.26, 0.12 ± 0.03 and 0.41 ± 0.32 (MPa) after 4 weeks in the suture, control, and frame methods; respectively. TEM analysis showed an increase in inflammatory cells in both suture and control methods following implantation. Conclusion Rat subcutaneous implantation with the frame method was performed with success and ease. The surgical approach used for the frame technique was found to be the best methodology for in vivo evaluation of tissue engineered acellular scaffolds, where the frame method did not compromise mechanical strength, but it reduced inflammation significantly.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.02.010
       
  • Tetrazolium salts and formazan products in Cell Biology: Viability
           assessment, fluorescence imaging, and labeling perspectives
    • Authors: Juan C. Stockert; Richard W. Horobin; Lucas L. Colombo; Alfonso Blázquez-Castro
      Abstract: Publication date: Available online 26 February 2018
      Source:Acta Histochemica
      Author(s): Juan C. Stockert, Richard W. Horobin, Lucas L. Colombo, Alfonso Blázquez-Castro
      For many years various tetrazolium salts and their formazan products have been employed in histochemistry and for assessing cell viability. For the latter application, the most widely used are 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT), and 5-cyano-2,3-di-(p-tolyl)-tetrazolium chloride (CTC) for viability assays of eukaryotic cells and bacteria, respectively. In these cases, the nicotinamide-adenine-dinucleotide (NAD(P)H) coenzyme and dehydrogenases from metabolically active cells reduce tetrazolium salts to strongly colored and lipophilic formazan products, which are then quantified by absorbance (MTT) or fluorescence (CTC). More recently, certain sulfonated tetrazolium, which give rise to water-soluble formazans, have also proved useful for cytotoxicity assays. We describe several aspects of the application of tetrazolium salts and formazans in biomedical cell biology research, mainly regarding formazan-based colorimetric assays, cellular reduction of MTT, and localization and fluorescence of the MTT formazan in lipidic cell structures. In addition, some pharmacological and labeling perspectives of these compounds are also described.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.02.005
       
  • Localization of EFA6 (exchange factor for ARF6) isoform D in steroidogenic
           testicular Leydig cells of adult mice
    • Authors: Surang Chomphoo; Sawetree Pakkarato; Tarinee Sawatpanich; Hiroyuki Sakagami; Hisatake Kondo; Wiphawi Hipkaeo
      Abstract: Publication date: Available online 26 February 2018
      Source:Acta Histochemica
      Author(s): Surang Chomphoo, Sawetree Pakkarato, Tarinee Sawatpanich, Hiroyuki Sakagami, Hisatake Kondo, Wiphawi Hipkaeo
      EFA6 (exchange factor for ARF6) activates Arf6 (ADP ribosylation factor 6) by exchanging ADP to ATP and the resulting activated form of Arf6 is involved in the membrane trafficking and actin remodeling of cells. Our previous study has shown the selective expression/localization of EFA6D in steroidogenic adrenocortical cells in situ of adult mice. In view of the previous finding, the present study was undertaken to examine its localization in mouse Leydig cells representing another steroidogenic cell species in order to further support the possible involvement of the EFA6/Arf6 cascade via membrane trafficking in the regulation of steroidogenesis and/or secretion. A distinct band for EFA6D with the same size as that of the brain was detected in the testis of adult mice. In immuno-light microscopy, immunoreactivity for EFA6D was seen throughout the cytoplasm in most Leydig cells without any distinct accumulation along the plasmalemma. Lack of immunoreactivity for EFA6D was seen in the seminiferous tubular epithelium. In immuno-electron microscopy, the immune-labeling was seen in sporadic/focal patterns on plasma membranes and some vesicles and vacuoles subjacent to the plasma membranes. More constant and rather predominant is the labeling on numerous mitochondria. No immuno-labeling was seen in lipid droplets. The present study suggests that EFA6D is somehow involved in regulation of the synthesis and/or secretion of testosterone through the membrane-traffic by activation of Arf6. In addition, EFA6D is suggested to play in mitochondria some yet unidentified roles rather independent of Arf6-activation, which remains to be elucidated.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.02.009
       
  • Evaluating the effect of three newly approved overactive bladder syndrome
           treating agents on parotid and submandibular salivary glands: Modulation
           of CXCL10 expression
    • Authors: Basma Emad Aboulhoda; Eid Nassar Ali
      Abstract: Publication date: Available online 26 February 2018
      Source:Acta Histochemica
      Author(s): Basma Emad Aboulhoda, Eid Nassar Ali
      Background Despite enormous progresses in understanding pathophysiology of the lower urinary tract, antimuscarinics remain the chief clinically well-established approach for improving symptoms of overactive bladder (OAB). Dry mouth on the other hand remains one of the most untolerated systemic side effects of these drugs that limits their uses and results in high discontinuation rate. Three novel drugs have been recently approved by US Food and Drug Administration for treatment of OAB: trospium, darifenacin, and solifenacin. Aims This study has been conducted to provide clear head to head comparative studying of histological and ultrastructural effect of those newly emerging drugs on parotid and submandibular salivary glands and to demonstrate the differential expression of CXCL10 to make a cogent structural and molecular assessment of the relative tolerability of these drugs and the potential mechanisms of occurrence of dry mouth. Methods Fifty male Sprague Dawley rats were equally divided into five groups: Group I (control), Group II (oxybutynin-treated), Group III (trospium-treated), Group IV (darifenacin-treated) and Group V (solifenacin-treated). Histological and ultrastructural studies were performed on parotid and submandibular glands. Measurement of salivary flow, PCR analysis and immunohistochemical assessment of CXCL10 expression have been carried-out. Results Muscarinic receptor antagonists led to various histological, morphometric and ultrastructural changes together with diminished salivary secretion and up-regulation of CXCL10 expression with the mildest alterations observed with solifenacin. Conclusions Solifenacin has shown the least adverse effects to salivary glands. CXCL10 is involved in degenerative changes of salivary glands induced by muscarinic antagonists.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.02.008
       
  • Localization of orexin B and orexin-2 receptor in the rat epididymis
    • Authors: Giovanna Liguori; Simona Tafuri; Chika Miyoshi; Masashi Yanagisawa; Caterina Squillacioti; Valeria De Pasquale; Nicola Mirabella; Alfredo Vittoria; Anna Costagliola
      Abstract: Publication date: Available online 26 February 2018
      Source:Acta Histochemica
      Author(s): Giovanna Liguori, Simona Tafuri, Chika Miyoshi, Masashi Yanagisawa, Caterina Squillacioti, Valeria De Pasquale, Nicola Mirabella, Alfredo Vittoria, Anna Costagliola
      The peptides orexin A (OXA) and orexin B (OXB) derived from the proteolytic cleavage of a common precursor molecule, prepro-orexin, were originally described in the rat hypothalamus. Successively, they have been found in many other brain regions as well as in peripheral organs of mammals and other less evolved animals. The widespread localization of orexins accounts for the multiple activities that they exert in the body, including the regulation of energy homeostasis, feeding, metabolism, sleep and arousal, stress, addiction, and cardiovascular and endocrine functions. Both OXA and OXB peptides bind to two G-coupled receptors, orexin-1 (OX1R) and orexin-2 (OX2R) receptor, though with different binding affinity. Altered expression/activity of orexins and their receptors has been associated with a large number of human diseases. Though at present evidence highlighted a role for orexins and cognate receptors in mammalian reproduction, their central and/or local effects on gonadal functions remain poorly known. Here, we investigated the localization of OXB and OX2R in the rat epididymis. Immunohistochemical staining of sections from caput, corpus and cauda segments of the organ showed intense signals for both OXB and OX2R in the principal cells of the lining epithelium, while no staining was detected in the other cell types. Negative results were obtained from immunohistochemical analysis of hypothalamic and testicular tissues from OX2R knock-out mice (OX2R−/−) and OX1R/OX2R double knock-out (OX1R−/−; OX2R−/−) mice, thus demonstrating the specificity of the rabbit polyclonal anti-OX2R antibody used in our study. On contrary, the same antibody clearly showed the presence of OX2R in sections from hypothalamus and testis of normal mice and rats which are well known to express the receptor. Thus, our results provide the first definite evidence for the immunohistochemical localization of OXB and OX2R in the principal cells of rat epididymis.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.02.011
       
  • Elements of molecular machinery of GABAergic signaling in the vertebrate
           cholinergic neuromuscular junction
    • Authors: Leniz F. Nurullin; Evgeny E. Nikolsky; Artem I. Malomouzh
      Abstract: Publication date: Available online 26 February 2018
      Source:Acta Histochemica
      Author(s): Leniz F. Nurullin, Evgeny E. Nikolsky, Artem I. Malomouzh
      It is generally accepted that gamma-aminobutyric acid (GABA) is a signaling molecule abundant in central synapses. In a number of studies though, it has been shown that GABA signaling functions in the peripheral nervous system as well, in particular, in the synapses of sympathetic ganglia. However, there exists no firm evidence on the presence of GABAergic signaling cascade in the intercellular junctions of the somatic nerve system. By the use of immunohistochemistry methods, in the synaptic area of cholinergic neuromuscular contact in rat diaphragm, we have detected glutamate decarboxylase, the enzyme involved in synthesis of GABA, molecules of GABA, and also GAT-2, a protein responsible for transmembrane transport of GABA. Earlier we have also shown that metabotropic GABAB receptors have overlapping localization in the same compartment. Moreover, activation of GABAB receptors affects the intensity of acetylcholine release. These data taken together, allows us to suggest that in the mammalian cholinergic neuromuscular junction, GABA is synthesized and performs certain synaptic signaling function.
      Graphical abstract image

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.02.003
       
  • Sinusoidal hemangioma and intravascular papillary endothelial hyperplasia:
           Interrelated processes that share a histogenetic piecemeal angiogenic
           mechanism
    • Authors: Lucio Díaz-Flores; Ricardo Gutiérrez; M.ª Pino García; M. González-Gómez; Francisco J. Sáez; Lucio Díaz-Flores; José Luis Carrasco; Juan F. Madrid
      Abstract: Publication date: Available online 25 February 2018
      Source:Acta Histochemica
      Author(s): Lucio Díaz-Flores, Ricardo Gutiérrez, M.ª Pino García, M. González-Gómez, Francisco J. Sáez, Lucio Díaz-Flores, José Luis Carrasco, Juan F. Madrid
      Sinusoidal hemangioma, characterized by interconnecting thin-walled vascular spaces, may present papillae/pseudo-papillae and zones that resemble intravascular papillary endothelial hyperplasia (IPEH). Our objectives are to explore the existence of zones in IPEH with sinusoidal hemangioma characteristics, the mechanism of papillary and septa formation in sinusoidal hemangioma and the comparison of this mechanism with that in IPEH. For these purposes, specimens of 4 cases of each entity were selected and studied by serial histologic sections and by immunochemistry and immunofluorescence procedures. The results showed a) zones with characteristics of sinusoidal hemangioma in IPEH cases, b) presence in both entities of papillae with a cover formed by a monolayer of CD34+ and CD31+ endothelial cells (ECs) and a core formed by either type I collagen and αSMA+ cells (presenting a pericyte/smooth muscle cell aspect) or thrombotic components, and c) a similar piecemeal angiogenic mechanism in papillary formation, including sprouting of intimal ECs toward the vessel wall itself or intravascular thrombi, formation of vascular loops that encircle and separate vessel wall or thrombus components, and parietal or thrombotic papillae development. The major differences between both entities were the number, arrangement and substrate of papillae: myriad, densely grouped, parietal and thrombotic papillae in IPEH, and a linear arrangement of predominant parietal papillae in sinusoidal hemangioma, originating septa (segmentation). In conclusion, sinusoidal hemangioma and IPEH are interrelated processes, which share morphologic findings and a piecemeal angiogenic mechanism, combining sprouting and intussusceptive angiogenesis, and leading to papillary formation and vessel segmentation.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.02.007
       
  • Deletion of Thioredoxin-interacting protein ameliorates high fat
           diet-induced non-alcoholic steatohepatitis through modulation of Toll-like
           receptor 2-NLRP3-inflammasome axis: Histological and immunohistochemical
           study
    • Authors: Islam N. Mohamed; Nahla Reda Sarhan; Mohamed Ahmed Eladl; Azza B. El-Remessy; Mohamed El-Sherbiny
      Abstract: Publication date: Available online 23 February 2018
      Source:Acta Histochemica
      Author(s): Islam N. Mohamed, Nahla Reda Sarhan, Mohamed Ahmed Eladl, Azza B. El-Remessy, Mohamed El-Sherbiny
      Endemic prevalence of obesity is associated with alarming increases in non-alcoholic steatohepatitis (NASH) with limited available therapeutics. Toll-like receptor2 (TLR2) and Nod-like receptor protein 3 (NLRP3) Inflammasome are implicated in hepatic steatosis, inflammation and fibrosis; the histological landmark stages of NASH. TXNIP, a member of α-arrestin family activates NLRP3 in response to various danger stimuli. The aim of current work was to investigate the effect of TXNIP genetic deletion on histological manifestations of high fat diet-induced steatohepatitis and activation of TLR2-NLRP3-inflammasome axis. Wild-type mice (WT) and TXNIP knock out (TKO) littermates were randomized to normal diet (WT-ND and TKO-ND) or high fat diet (HFD, 60% fat) (WT-HFD and TKO-HFD). After 8-weeks, liver samples from all groups were evaluated by histological, immunohistochemical and western blot analysis. HFD resulted in significant induction of micro and macrovesicular hepatic steatosis, that was associated with increased inflammatory immune cell infiltration in WT-HFD compared with WT-ND and TKO-ND controls, but not in TKO-HFD group. In parallel, WT-HFD group showed significant fibrosis and α-SMA expression; a marker of pro-fibrotic stellate-cell activation, in areas surrounding the central vein and portal circulation, versus all other groups. Western blot revealed increased activation of TLR2-NLRP3 inflammasome pathway and downstream IL-1β and TNFα in WT-HFD group, but not in TKO-HFD group. IL-1β expression coincided within the same areas of steatosis, inflammatory cell infiltration, collagen deposition and α-SMA expression in WT-HFD mice, that was significantly reduced in TKO-HFD mice. In conclusion, TXNIP deletion ameliorates the HFD-induced steatosis, inflammatory and fibrotic response via modulation of TLR2-NLRP3 inflammasome axis. Targeting TXNIP-TLR2-NLRP3 pathway may provide potential therapeutic modalities for NASH treatment.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.02.006
       
  • Non-competitive antagonists of NMDA and AMPA receptors decrease
           seizure-induced c-fos protein expression in the cerebellum and protect
           against seizure symptoms in adult rats
    • Authors: Adrienne
      Abstract: Publication date: Available online 22 February 2018
      Source:Acta Histochemica
      Author(s): Zoltán Tóth, András Mihály, Adrienne Mátyás, Beáta Krisztin-Péva
      The aim of the present study was to examine the role of ionotropic glutamate receptors in the cerebellum during generalized seizures. Epileptic neuronal activation was evaluated through the immunohistochemical detection of c-fos protein in the cerebellar cortex. Generalized seizures were precipitated by the intraperitoneal injection of 4-aminopyridine. The animals were pretreated with the NMDA receptor antagonists MK-801 (2 mg/kg), amantadine (50 mg/kg), and the AMPA receptor antagonist GYKI 52466 hydrochloride (50 mg/kg). Two hours after 4-aminopyridine injection, the number of c-fos immunostained cell nuclei was counted in serial immunohistochemical sections of the cerebellar vermis. The number of c-fos immunostained cell nuclei in the granular layer decreased significantly in animals pretreated with the glutamate receptor antagonists compared to the untreated animals having convulsion. We can conclude that mossy fiber stimulation exerts its seizure-generating action mainly through the ionotropic glutamate receptors of the mossy fiber synapses. Both NMDA and AMPA receptor antagonists are effective in reducing glutamate-mediated postsynaptic effects in the cerebellar cortex.

      PubDate: 2018-03-19T08:55:39Z
       
  • Subchronic exposure to acrylamide leads to pancreatic islet remodeling
           determined by alpha cell expansion and beta cell mass reduction in adult
           rats
    • Authors: Milena Stošić; Milica Matavulj; Jelena Marković
      Abstract: Publication date: Available online 15 February 2018
      Source:Acta Histochemica
      Author(s): Milena Stošić, Milica Matavulj, Jelena Marković
      Acrylamide (AA) is a toxic substance, used to synthesize polymers for industrial and laboratory processes. Also, AA is a food contaminant formed during the high temperature preparation of carbohydrate-rich food. The main subject of this study was to examine effects of subchronic AA treatment on the islets of Langerhans of adult rats. Adult male Wistar rats were orally treated with 25 or 50 mg/kg bw of AA for 3 weeks. Qualitative and quantitative immunohistochemical evaluation of glucagon and insulin expression and stereological analyses of pancreatic alpha and beta cells were performed. Serum insulin and glucose levels were measured. Analysis of glucagon-immunostained sections revealed a dose-dependent increase of intensity of glucagon immunopositive signal, alpha cell surface and numerical densities, volume density of alpha cell nuclei and nucleocytoplasmic ratio in AA-treated groups compared to the control. In insulin-immunolabeled pancreatic sections in AA-treated animals was observed decrease of intensity of insulin immunopositive signal, beta cell surface, numerical and volume densities and volume density of beta cell cytoplasm. Serum insulin and glucose concentrations remained unchanged after both AA treatments. The number of islets of Langerhans was not affected by AA treatment. Our results suggest that AA subchronic treatment of adult rats leads to remodeling of islet of Langerhans characterized by alpha cell expansion and beta cell mass reduction.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.02.002
       
  • Expression patterns of claudin-5 and its related signals during luteal
           regression in pseudopregnant rats: The enhanced effect of additional PGF
           treatment
    • Authors: Lina Qi; Jingle Jiang; Pengjin Jin; Meiqian Kuang; Quanwei Wei; Fangxiong Shi; Dagan Mao
      Abstract: Publication date: Available online 12 February 2018
      Source:Acta Histochemica
      Author(s): Lina Qi, Jingle Jiang, Pengjin Jin, Meiqian Kuang, Quanwei Wei, Fangxiong Shi, Dagan Mao
      To study the expression patterns of claudin-5 and its related signals during luteal regression in rats, a sequential PMSG/hCG treatment paradigm was used to obtain a single, well-defined generation of corpus luteum (CL). A total of 35 rats were treated with one PGF or two PGF at an interval of 24 h from day 7 of pseudopregnancy to induce CL regression. Serum and ovaries were collected at 0, 2, 4, 8 or 24 h after one PGF injection (1 PGF), 2 or 24 h after two PGF injections (2 PGF). The serum progesterone level was detected by RIA; the ovarian expression of claudin-5, the phosphorylations of STAT3 (p-STAT3), Akt (p-Akt), ERK1/2 (p-ERK) and p38 MAPK (p-p38) were detected by western blot, real-time PCR and IHC. Results showed that serum progesterone (P4) decreased after PGF treatment. Claudin-5 mRNA decreased at 4 h and 8 h after 1 PGF and 2 h after 2 PGF, and claudin-5 protein decreased at 4 h after 1 PGF. p-STAT3 increased at 4 h after 1 PGF and 2 h after 2 PGF. p-ERK increased at 2 h after 2 PGF. The level of p-Akt decreased at 4 h after 1 PGF. PGF treatment did not alter the phosphorylation of p38 MAPK at any time points in this study. IHC results revealed that claudin-5 was expressed in the nuclei and cytoplasm of steroidogenic cells and in the vessels, while PGF induced-p-STAT3 was expressed uniformly in the cytoplasm of luteal steroidogenic cells. In conclusion, PGF treatment decreased the expression of claudin-5 and the additional PGF treatment enhanced the decrease in claudin-5 mRNA expression and the increases in ERK1/2 and STAT3 phosphorylation in the corpus luteum of pseudopregnant rats, which will contribute new information to the further study of molecular mechanism of luteal regression.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.02.001
       
  • Growth factors FGF8 and FGF2 and their receptor FGFR1, transcriptional
           factors Msx-1 and MSX-2, and apoptotic factors p19 and RIP5 participate in
           the early human limb development
    • Authors: Tina Becic; Darko Kero; Katarina Vukojevic; Snjezana Mardesic; Mirna Saraga-Babic
      Abstract: Publication date: Available online 4 February 2018
      Source:Acta Histochemica
      Author(s): Tina Becic, Darko Kero, Katarina Vukojevic, Snjezana Mardesic, Mirna Saraga-Babic
      The expression pattern of fibroblast growth factors FGF8 and FGF2 and their receptor FGFR1, transcription factors MSX-1 and MSX-2, as well as cell proliferation (Ki-67) and cell death associated caspase-3, p19 and RIP5 factors were analyzed in histological sections of eight 4th-9th-weeks developing human limbs by immunohistochemistry and semi-thin sectioning. Increasing expression of all analyzed factors (except FGF8) characterized both the multilayered human apical ectodermal ridge (AER), sub-ridge mesenchyme (progress zone) and chondrocytes in developing human limbs. While cytoplasmic co-expression of MSX-1 and MSX-2 was observed in both limb epithelium and mesenchyme, p19 displayed strong cytoplasmic expression in non-proliferating cells. Nuclear expression of Ki-67 proliferating cells, and partly of MSX-1 and MSX-2 was detected in the whole limb primordium. Strong expression of factors p19 and RIP5, both in the AER and mesenchyme of human developing limbs indicates their possible involvement in control of cell senescence and cell death. In contrast to animal studies, expression of FGFR1 in the surface ectoderm and p19 in the whole limb primordium might reflect interspecies differences in limb morphology. Expression of FGF2 and downstream RIP5 gene, and transcription factors Msx-1 and MSX-2 did not show human-specific changes in expression pattern. Based on their spatio-temporal expression during human limb development, our study indicates role of FGFs and Msx genes in stimulation of cell proliferation, limb outgrowth, digit elongation and separation, and additionally MSX-2 in control of vasculogenesis. The cascade of orchestrated gene expressions, including the analyzed developmental factors, jointly contribute to the complex human limb development.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.01.008
       
  • Expression profile of polycomb group proteins in odontogenic keratocyst
           and ameloblastoma
    • Authors: Puangwan Lapthanasupkul; Rachai Juengsomjit; Sopee Poomsawat; Tawepong Arayapisit
      Abstract: Publication date: Available online 4 February 2018
      Source:Acta Histochemica
      Author(s): Puangwan Lapthanasupkul, Rachai Juengsomjit, Sopee Poomsawat, Tawepong Arayapisit
      Polycomb group (PcG) proteins are repressive chromatin modifiers required for proliferation and development. PcG proteins form two large repressive complexes, namely, Polycomb Repressive Complex 1 and 2. These proteins have been shown to drive tumorigenesis by repressing cell-type specific sets of target genes. Using immunohistochemistry, we investigated the expression patterns of five human PcG proteins, including Bmi-1, Ring1b, Mel-18, Ezh2, and Suz12, in various cellular components of odontogenic keratocysts (OKCs), ameloblastomas and, pericoronal follicles (PFs). In OKCs, expression of PcG proteins were found in the majority of cases while the expression pattern was relatively different for each PcG proteins. All PcG proteins were strongly expressed in the basal cells while some proteins showed variable expression in the parabasal and luminal cell layer of OKCs. In ameloblastomas, almost all PcG proteins showed a similar expression pattern of moderate to strong staining in the peripheral ameloblast-like cells and metaplastic squamous cells. Some of the central stellate reticulum-like cells also showed positive reaction to most PcG proteins. In PFs, most PcG proteins were intensely expressed in odontogenic epithelium lining the follicles, except Mel-18 and Suz12. The present study provides the initial evidence regarding epigenetic involvement by PcG proteins in these odontogenic lesions. Although these proteins are known to be in the same repressive group proteins, differential expression patterns of these proteins in OKCs and ameloblastomas indicates that these proteins may play different roles in pathogenesis of these odontogenic lesions.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.01.009
       
  • Apelin/APJ expression in the heart and kidneys of hypertensive rats
    • Authors: Rahime Sekerci; Nuray Acar; Filiz Tepekoy; Ismail Ustunel; Nigar Keles-Celik
      Abstract: Publication date: Available online 1 February 2018
      Source:Acta Histochemica
      Author(s): Rahime Sekerci, Nuray Acar, Filiz Tepekoy, Ismail Ustunel, Nigar Keles-Celik
      Hypertension is an important health problem that is manifested by systemic arterial blood pressure being permanently elevated and leading to serious complications. Hypertension is the basis for coronary heart diseases, heart failure, kidney damage, cerebrovascular diseases. Due to ethical concerns, there is no detailed study of the mechanism, side effects and treatment of hypertension in humans. For this reason, specific studies related to the organ of hypertension are performed in experimental animals. The heart and kidney tissue, which are the most important organs that hypertension has damaged, have formed specific organs of our work. In our experimental study, a total of 35 (hypertensive group: 20, control group: 15) Rattus Norvegicus Wistar albino rats were used. In order to obtain our hypertension model, our experimental animals were given L-NAME together with drinking water for six weeks. After six weeks, the experimental procedures were terminated. Heart and kidney tissues of the hypertensive and control group were obtained. Expression of apelin and apelin receptor (APJ) was demonstrated by immunohistochemical and Western Blot protocols. Hypertrophic cardiac atrium of the hearts of the large cavities, interventricular septum and myocardium to the disintegration, as well as an increase in the diameter of the coronary artery has been observed. In general, kidney tissues of the hypertensive group showed narrowing in cortical renal structures and enlargement in structures in the renal medulla. As a result, in hypertensive cases, there was an increase in expression of Apelin and APJ receptor in heart tissue, and a decrease in expression of Apelin and APJ receptor in kidney tissue. We think that our findings may contribute to experimental or clinical studies related to hypertension and apelin.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.01.007
       
  • The MTT-formazan assay: Complementary technical approaches and in vivo
           validation in Drosophila larvae
    • Authors: Raquel Pascua-Maestro; Miriam Corraliza-Gomez; Sergio Diez-Hermano; Candido Perez-Segurado; María D. Ganfornina; Diego Sanchez
      Abstract: Publication date: Available online 1 February 2018
      Source:Acta Histochemica
      Author(s): Raquel Pascua-Maestro, Miriam Corraliza-Gomez, Sergio Diez-Hermano, Candido Perez-Segurado, María D. Ganfornina, Diego Sanchez
      The MTT assay was the first widely accepted method to assess cytotoxicity and cell viability. However, there is controversy on whether this indicator is a useful tool. In this work we intend to expand the interpretability of the MTT study by its combination with widely used cellular biology techniques. We propose complementary approaches to the colorimetric assay, based on the use of measurements in three different settings: confocal microscopy, multi-well plate assay and flow cytometry. Using confocal microscopy, we confirmed that MTT uptake and reduction by cells is a time-dependent process, and that formazan accumulates in round-shaped organelles. Quantitative measurements with a multi-well fluorimeter combined with nuclear staining result in a useful method, yielding a ratio between formazan production and cell number that informs about the average cell metabolic state. We also found that flow cytometry is a suitable technique to measure MTT reduction in large cell populations. When assaying the effect of an oxidizing agent such as paraquat (PQ), this approach allows for the distinction of subpopulations of cells with different reducing power. Finally, we prove that it is feasible to monitor MTT reduction in an in vivo model, the Drosophila larvae, without affecting its survival rate. Formazan accumulates exclusively in the larval fat body, confirming its lipid solubility. The methods explored in this work expand the MTT potential as a useful tool to provide information of the physiological state of cells and organisms.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.01.006
       
  • Dystrophin 71 and α1syntrophin in morpho-functional plasticity of rat
           supraoptic nuclei: Effect of saline surcharge and reversibly normal
           hydration
    • Authors: Madina Sifi; Roza Benabdesselam; Sabrina Souttou; Tiziana Annese; Alvaro Rendon; Beatrice Nico; Latifa Dorbani-Mamine
      Abstract: Publication date: Available online 1 February 2018
      Source:Acta Histochemica
      Author(s): Madina Sifi, Roza Benabdesselam, Sabrina Souttou, Tiziana Annese, Alvaro Rendon, Beatrice Nico, Latifa Dorbani-Mamine
      Dystrophin (Dp) is a multidomain protein that links the actin cytoskeleton to the extracellular matrix through the dystrophin associated proteins complex (DAPC). Dp of 71 kDa (Dp71), corresponding to the COOH-terminal domain of dystrophin, and α1-syntrophin (α1Syn) as the principal component of the DAPC, are strongly expressed in the brain. To clarify their involvement in the central control of osmotic homeostasis, we investigated the effect of 14 days of salt loading (with drinking water containing 2% NaCl) and then reversibly to 30 days of normal hydration (with drinking water without salt), first on the expression by western-blotting and the distribution by immunochemistry of Dp71 and α1Syn in the SON of the rat and, second, on the level of some physiological parameters, as the plasma osmolality, natremia and hematocrit. Dp71 is the most abundant form of dystrophin revealed in the supraoptic nucleu (SON) of control rat. Dp71 was localized in magnocellular neurons (MCNs) and astrocytes, when α1Syn was observed essentially in astrocytes end feet. After 14 days of salt-loading, Dp71 and α1Syn signals decreased and a dual signal for these two proteins was revealed in the astrocytes processes SON surrounding blood capillaries. In addition, salt loading leads to an increase in plasma osmolality, natremia and hematocrit. Reversibly, after 30 days of normal hydration, the intensity of the signal for the two proteins, Dp71 and α1Syn, increased and approached that of control. Furtheremore, the levels of the physiological parameters decreased and approximated those of control. This suggests that Dp71 and α1Syn may be involved in the functional activity of the SON. Their localization in astrocyte end feet emphasizes their importance in neuronal–vascular–astrocyte interactions for the central detection of osmolality. In the SON, Dp71 and α1Syn may be involved in osmosensitivity.

      PubDate: 2018-03-19T08:55:39Z
      DOI: 10.1016/j.acthis.2018.01.004
       
  • Antioxidant activity of CAPE (caffeic acid phenethyl ester) in vitro can
           protect human sperm deoxyribonucleic acid from oxidative damage
    • Authors: Şule Ayla; Gülden Tunalı; Bülent E. Bilgiç; Kenan Sofuoğlu; A.Arman Özdemir; Gamze Tanrıverdi; Semra Özdemir; B.Cem Soner; Bahar Öztürk; Serçin Karahüseyinoğlu; Esra Güler Aslan; Ismail Seçkin
      Abstract: Publication date: Available online 8 January 2018
      Source:Acta Histochemica
      Author(s): Şule Ayla, Gülden Tunalı, Bülent E. Bilgiç, Kenan Sofuoğlu, A.Arman Özdemir, Gamze Tanrıverdi, Semra Özdemir, B.Cem Soner, Bahar Öztürk, Serçin Karahüseyinoğlu, Esra Güler Aslan, Ismail Seçkin
      Purpose Sperm processing (e.g., centrifugation) used in preparation for assisted reproduction can result in excessive generation of reactive oxygen species (ROS) and potential sperm damage. The use of antioxidants during sperm processing has been shown to prevent iatrogenic sperm damage, including DNA damage. In this study, we evaluated the effect of caffeic acid phenethyl ester (CAPE) on oxidative stress mediated sperm dysfunction and DNA damage. Methods Semen samples were obtained to liquefy at room temperature. After centrifugation and washing protocols, spermatozoa were incubated in a single step supplemented medium with either of 10, 50 or 100 μmol/L CAPE for 2 hours at 36 °C. After incubation period, MDA levels of seminal plasma were measured. The fragmentation in sperm DNA was detected by light microscopy via use of an aniline blue assay, while ultrastructural morphology was analyzed by transmission electron microscopy. Results Significant increase has been observed in percent chromatin condensation (assessed by aniline blue staining) and Malondialdehyde (Mmol/L) in oligoasthenoteratozoospermia group before the centrifugation (0.57 ± 0.15). Incubation of samples with 100 μmol/L CAPE after centrifugation resulted in a significantly lower percent chromatin condensation compared to samples incubated without CAPE (0.42 ± 0.12) (P < 0.0033). Incubation of all samples with CAPE (10 μmol/L, 50 μmol/L, 100 μmol/L.) after centrifugation resulted in a significantly lower percentage of Malondialdehyde levels. Conclusions The data suggests that preincubation of spermatozoa with the antioxidant CAPE offers protection against oxidative DNA damage in vitro.

      PubDate: 2018-01-09T20:24:15Z
      DOI: 10.1016/j.acthis.2018.01.001
       
  • Distribution of nerve fibers during the development of palatine glands in
           rats
    • Authors: Zaki Hakami
      Abstract: Publication date: Available online 26 December 2017
      Source:Acta Histochemica
      Author(s): Zaki Hakami
      Background Salivary gland maturation and function are modulated by the nervous system. Nevertheless, little is known about salivary gland innervation during development, particularly minor salivary glands. This study investigated the development of the innervation of the palatine glands of rat. Materials and methods Frozen sections of rat palatine glands at different stages were immunohistochemically labeled for detection of the general nerve markers protein gene product 9.5 (PGP 9.5) and growth associated protein 43 (GAP-43), and the autonomic nerve markers calcitonin gene-related peptide (CGRP) and neuropeptide Y (NPY). Results PGP 9.5 and GAP-43-immunoreactive fibers (IRF) were present in the mesenchyme and in association with developing acini, ducts and blood vessels. GAP-43-IRF were more abundant and diffuse than PGP 9.5-IRF at early stages, but showed similar distribution with growth, ramifying out from thick bundles in connective tissues until encircling the secretory units observed around postnatal day 21 (PN21). CGRP-IRF were detected in the mesenchyme at embryonic day 20 (E20) and PN0. CGRP-IRF became numerous around PN7 and PN10. They then decreased to the adult level at PN21, mainly located around ducts and infrequently blood vessels. NPY-IRF were sparsely detected in the mesenchyme at E20, then detected in close proximity to acini in addition to blood vessels at PN3. NPY-IRF increased till reaching the adult stage, and were mainly associated with blood vessels and around mucous cells and some serous demilunes. Conclusion The findings indicated a developmental modification of the sensory and autonomic innervation which may play a role in the functional maturation of the palatine salivary glands.

      PubDate: 2017-12-26T20:55:40Z
      DOI: 10.1016/j.acthis.2017.12.007
       
  • Diabetes mellitus- induction: Effect of different streptozotocin doses on
           male reproductive parameters
    • Authors: Temidayo S. Omolaoye; Bongekile T. Skosana; Stefan S. du Plessis
      Abstract: Publication date: Available online 24 December 2017
      Source:Acta Histochemica
      Author(s): Temidayo S. Omolaoye, Bongekile T. Skosana, Stefan S. du Plessis
      Diabetes mellitus (DM) is reported to be involved in male reproductive impairment, and its impact is evident in the increased prevalence of infertility. Various studies have reported that a single parenteral injection of <40 mg/kg Streptozotocin (STZ) is ineffective in ablating pancreatic β-cells and creating a rat model to investigate the effect of DM on the male reproductive system. This study therefore aims to validate these claims. Adult male Wistar rats received either a single intraperitoneal injection of STZ (30 mg/kg or 60 mg/kg) or saline (0.9%, Control). Diabetes was confirmed after 72 h if plasma glucose levels were ≥14 mmol/L. Body weight, glucose level, fluid and food intake were measured weekly. Animals were sacrificed after 8 weeks of treatment by an overdose of sodium pentobarbital (160 mg/kg body weight). The testis and epididymis were harvested and weighed prior to preparation for histological evaluation. Epididymal sperm morphology was analysed using computer aided sperm analysis (CASA). STZ60 animals presented with significantly lower body weights compared to both control and STZ30 groups. Animals in both STZ30 and STZ60 groups showed decreased normal sperm morphology compared to control. Histological evaluation of the testes showed a decrease in the number of spermatozoa in the seminiferous tubules of animals in the STZ30 and STZ60 groups compared to control. A complete absence of spermiogenesis was observed in the seminiferous tubules of STZ60 animals. These findings prove that an STZ concentration of 30 mg/kg, which is much lower than the reported 40 mg/kg, has adverse effects on the male reproductive system via its diabetogenic effect and can therefore be used to study the impact of DM on male fertility.

      PubDate: 2017-12-26T20:55:40Z
      DOI: 10.1016/j.acthis.2017.12.005
       
  • MiR-199-3p replacement affects E-cadherin expression through Notch1
           targeting in hepatocellular carcinoma
    • Authors: Catia Giovannini; Francesca Fornari; Rossella Dallo; Martina Gagliardi; Elisa Nipoti; Francesco Vasuri; Camelia Alexandra Coadă; Matteo Ravaioli; Luigi Bolondi; Laura Gramantieri
      Abstract: Publication date: Available online 15 December 2017
      Source:Acta Histochemica
      Author(s): Catia Giovannini, Francesca Fornari, Rossella Dallo, Martina Gagliardi, Elisa Nipoti, Francesco Vasuri, Camelia Alexandra Coadă, Matteo Ravaioli, Luigi Bolondi, Laura Gramantieri
      Hepatocellular carcinoma (HCC) represents the second cause of cancer-related mortality worldwide and is associated with poor prognosis, due to a high recurrence rate after curative treatments and a drug resistance phenotype. In this scenario, the identification of innovative and effective therapeutic strategies is an unmet clinical need. The safety and efficacy of microRNA (miRNA) mediated approaches in preclinical models and clinical trials have been widely described in cancer. MicroRNA-199a downregulation is a common feature of HCC where its reduced expression contributes to mTOR and c-Met pathways activation. Notch1 activation is also a common event in HCC, influencing epithelial-to-mesenchymal transition, tumor invasion and recurrence at least in part through E-cadherin regulation. Here we identified a negative correlation between miR-199a-3p and Notch1 or E-cadherin protein levels in HCC patients and demonstrated that miR-199a-3p regulates E-cadherin expression through Notch1 direct targeting in in vitro models. Moreover, we showed that a strong correlation exists between miR-199a-5p and miR-199a-3p in HCC specimens and that miR-199a-5p contributes to E-cadherin regulation as well, underlying the complex network of interaction carried out by miR-199a and its influence on tumor aggressiveness. In conclusion, our findings suggest the restoration of miR-199a-3p physiologic levels as a possible therapeutic strategy for the treatment of HCC.
      Graphical abstract image

      PubDate: 2017-12-26T20:55:40Z
      DOI: 10.1016/j.acthis.2017.12.004
       
  • Confirmation of the immunoreactivity of monoclonal anti-human C-terminal
           EGFR antibodies in bronze Corydoras Corydoras aeneus (Callichthyidae
           Teleostei) by Western Blot method
    • Authors: Jennifer Mytych; Leszek Satora; Katarzyna Kozioł
      Abstract: Publication date: Available online 13 December 2017
      Source:Acta Histochemica
      Author(s): Jennifer Mytych, Leszek Satora, Katarzyna Kozioł
      Bronze corydoras (Corydoras aeneus) uses the distal part of the intestine as accessory respiratory organ. Our previous study showed the presence of epidermal growth factor receptor (EGFR) cytoplasmic domain in the digestive tract of the bronze corydoras. In this study, using Western Blot method, we validated the results presented in the previous research. In detail, results of Western Blot analysis on digestive and respiratory part of bronze corydoras intestine homogenates confirmed the immunoreactivity of anti-cytoplasmic domain (C-terminal) human EGFR antibodies with protein band of approximately 180kDa (EGFR molecular weight). This indicates a high homology of EGFR domain between these species and the possibility of such antibody use in bronze corydoras. Statistically significantly higher EGFR expression was observed in the respiratory part of intestine when compared to the digestive part. This implies higher proliferation activity and angiogenesis of epithelium in this part of intestine, creating conditions for air respiration. Therefore, Corydoras aeneus may be considered as a model organism for the molecular studies of the mechanisms of epithelial proliferation initiation and inhibition depending on hypoxia and normoxia.

      PubDate: 2017-12-13T04:45:23Z
      DOI: 10.1016/j.acthis.2017.12.002
       
  • Polyploidy and nuclear phenotype characteristics of cardiomyocytes from
           diabetic adult and normoglycemic aged mice
    • Authors: Isabela S. Silva; Flávia G. Ghiraldini; Giovana M.B. Veronezi; Maria Luiza S. Mello
      Abstract: Publication date: Available online 12 December 2017
      Source:Acta Histochemica
      Author(s): Isabela S. Silva, Flávia G. Ghiraldini, Giovana M.B. Veronezi, Maria Luiza S. Mello
      The frequency of polyploid nuclei in the aging human heart is in sharp contrast with that in the human liver. An inverse pattern exists between the mouse heart and liver cells. Ploidy degrees in mouse hepatocytes under hyperglycemic conditions are elevated to higher levels than those in aged hepatocytes. In this study, image analysis cytometry was used to investigate the effect of diabetes and aging on Feulgen-DNA quantities, ploidy degrees, nuclear shapes and chromatin texture in mouse cardiomyocytes compared to previously reported data for mouse hepatocytes. Adult, non-obese diabetic (NOD) hyperglycemic and normoglycemic females and 56-week-old normoglycemic BALB/c females were used. A small percentage (∼7%) of the cardiomyocyte nuclei in severely hyperglycemic NOD adult mice possessed higher ploidy values than those in the 8-week-old normoglycemic mice. Surprisingly, the Feulgen-DNA values and the frequency of nuclei belonging to the 4C and 8C ploidy classes were even higher (∼6%) in normoglycemic NOD specimens than in age-matched hyperglycemic NOD specimens. Additionally, a pronounced elongated nuclear shape was observed especially in adult normoglycemic NOD mice. In conclusion, NOD mice, irrespective of their glycemic level, exhibit a moderate increase in ploidy degrees within cardiomyocyte nuclei during the adult lifetime. As expected, aging did not affect the Feulgen-DNA values and the ploidy degrees of cardiomyocytes in BALB/c mice. The differences in ploidy degrees and chromatin textures such as absorbance variability and entropy, between adult NOD and aged BALB/c mice are consistent with other reports, indicating dissimilarities in chromatin functions between diabetes and aging.

      PubDate: 2017-12-13T04:45:23Z
      DOI: 10.1016/j.acthis.2017.12.003
       
  • Neurons and satellite glial cells in adult rat lumbar dorsal root ganglia
           express connexin 36
    • Authors: E. Martha Pérez Armendariz; Monica Norcini; Beatriz Hernández-Tellez; Andrés Castell-Rodríguez; Cristina Coronel-Cruz; Raquel Guerrero Alquicira; Alexandra Sideris; Esperanza Recio-Pinto
      Abstract: Publication date: Available online 8 December 2017
      Source:Acta Histochemica
      Author(s): E. Martha Pérez Armendariz, Monica Norcini, Beatriz Hernández-Tellez, Andrés Castell-Rodríguez, Cristina Coronel-Cruz, Raquel Guerrero Alquicira, Alexandra Sideris, Esperanza Recio-Pinto
      Previous studies have shown that following peripheral nerve injury there was a downregulation of the gap junction protein connexin 36 (Cx36) in the spinal cord; however, it is not known whether Cx36 protein is expressed in the dorsal root ganglia (DRGs), nor if its levels are altered following peripheral nerve injuries. Here we address these aspects in the adult rat lumbar DRG. Cx36 mRNA was detected using qRT-PCR, and Cx36 protein was identified in DRG sections using immunohistochemistry (IHC) and immunofluorescence (IF). Double staining revealed that Cx36 co-localizes with both anti-β-III tubulin, a neuronal marker, and anti-glutamine synthetase, a satellite glial cell (SGC) marker. In neurons, Cx36 staining was mostly uniform in somata and fibers of all sizes and its intensity increased at the cell membranes. This labeling pattern was in contrast with Cx36 IF dots mainly found at junctional membranes in islet beta cells used as a control tissue. Co-staining with anti-Cx43 and anti-Cx36 showed that whereas mostly uniform staining of Cx36 was found throughout neurons and SGCs, Cx43 IF puncta were localized to SGCs. Cx36 mRNA was expressed in normal lumbar DRG, and it was significantly down-regulated in L4 DRG of rats that underwent sciatic nerve injury resulting in persistent hypersensitivity. Collectively, these findings demonstrated that neurons and SGCs express Cx36 protein in normal DRG, and suggested that perturbation of Cx36 levels may contribute to chronic neuropathic pain resulting from a peripheral nerve injury.

      PubDate: 2017-12-12T04:44:25Z
      DOI: 10.1016/j.acthis.2017.11.005
       
  • Effects of acrylamide on oxidant/antioxidant parameters and CYP2E1
           expression in rat pancreatic endocrine cells
    • Authors: Jelena Marković; Milena Stošić; Danijela Kojić; Milica Matavulj
      Abstract: Publication date: Available online 8 December 2017
      Source:Acta Histochemica
      Author(s): Jelena Marković, Milena Stošić, Danijela Kojić, Milica Matavulj
      Oxidative stress is one of the principle mechanism of acrylamide-induced toxicity. Acrylamide is metabolized by cytochrome P450 2E1 (CYP2E1) to glycidamide or by direct conjugation with glutathione. Bearing in mind that up to now the effects of acrylamide on oxidative stress status and CYP2E1 level in endocrine pancreas have not been studied we performed qualitative and quantitative immunohistochemical evaluation of inducible nitric oxide synthase (iNOS), superoxide dismutase 1 (SOD1), superoxide dismutase 2 (SOD2), catalase (CAT) and CYP2E1 expression in islets of Langerhans of rats subchronically treated with 25 or 50mg/kg bw of acrylamide. Since the majority of cells (>80%) in rodent islets are beta cells, in parallel studies, we employed the Rin-5F beta cell line to examine effects of acrylamide on redox status and the activity of CAT, SOD and glutathione-S-transferase (GST), their gene expression, and CYP2E1, NF-E2 p45-related factor 2 (Nrf2) and iNOS expression. Immunohistochemically stained pancreatic sections revealed that acrylamide induced increase of iNOS and decrease of CYP2E1 protein expression, while expression of antioxidant enzymes was not significantly affected by acrylamide in islets of Langerhans. Analysis of Mallory-Azan stained pancreatic sections revealed increased diameter of blood vessels lumen in pancreatic islets of acrylamide-treated rats. Increase in the GST activity, lipid peroxidation and nitrite level, and decrease in GSH content, CAT and SOD activities was observed in acrylamide-exposed Rin-5F cells. Level of mRNA was increased for iNOS, SOD1 and SOD2, and decreased for GSTP1, Nrf2 and CYP2E1 in acrylamide-treated Rin-5F cells. This is the first report of the effects of acrylamide on oxidant/antioxidant parameters and CYP2E1 expression in pancreatic endocrine cells.

      PubDate: 2017-12-12T04:44:25Z
      DOI: 10.1016/j.acthis.2017.12.001
       
  • The underlying physiological basis of the desert rodent Meriones shawi's
           survival to prolonged water deprivation: Central vasopressin regulation on
           peripheral kidney water channels AQPs-2
    • Authors: A. Elgot; O. El Hiba; M. Belkouch; H. Gamrani
      Abstract: Publication date: Available online 6 December 2017
      Source:Acta Histochemica
      Author(s): A. Elgot, O. El Hiba, M. Belkouch, H. Gamrani
      Meriones shawi (M. shawi) is a particular semi-desert rodent known by its resistance to long periods of thirst. The aim of the present investigation is to clarify the underlying mechanisms allowing M. shawi to resist to hard conditions of dehydration. For this reason we used two different approaches: i) a morphometric study, which consists in measuring the effect of dehydration on body and kidneys weights as well as the report kidney weight/body weight, ii) By immunohistochemistry, we proceed to study the effect of dehydration on the immunoreactivity of central vasopressin (AVP) and the kidney aquaporin-2 (AQP-2) which is a channel protein that allows water to permeate across cell membranes. Our results showed both a body mass decrease accompanied by a remarkable kidneys hypertrophy. The immunohistochemical study showed a significant increase of AQP-2 immunoreactivity in the medullar part of Meriones kidneys allowing probably to Meriones a great ability to water retention. Consistently, we demonstrate that the increased AQP-2 expression occurred together with an increase in vasopressin (AVP) expression in both hypothalamic supraoptic (SON) and paraventricular nucleus (PVN), which are a major hub in the osmotic control circuitry. These various changes seen either in body weight and kidneys or at the cellular level might be the basis of peripheral control of body water homeostasis, providing to M. shawia strong resistance against chronic dehydration.

      PubDate: 2017-12-12T04:44:25Z
      DOI: 10.1016/j.acthis.2017.11.006
       
  • Immunohistochemical analysis of the distribution of molecules involved in
           ionic and pH regulation in the lancelet Branchiostoma floridae (Hubbs,
           1922)
    • Authors: Ivan Cuoghi; Clara Lazzaretti; Mauro Mandrioli; Lucrezia Mola; Aurora Pederzoli
      Abstract: Publication date: Available online 21 November 2017
      Source:Acta Histochemica
      Author(s): Ivan Cuoghi, Clara Lazzaretti, Mauro Mandrioli, Lucrezia Mola, Aurora Pederzoli
      The aim of present work is to analyse the distribution of carbonic anhydrase II (CAII), cystic fibrosis transmembrane regulator (CFTR), vacuolar-type H+-ATPase (V-H+-ATPase), Na+/K+ ATPase, Na+/H+ exchanger (NHE) and SLC26A6 (solute carrier family 26, member 6), also known as pendrin protein, in the lancelet Branchiostoma floridae in order to go in depth in the evolution of osmoregulation and pH regulation in Chordates. In view of their phylogenetic position, lancelets may indeed provide a critical point of reference for studies on osmoregulation evolution in Chordates. The results of present work demonstrated that, except to Na+/K+ ATPase that is strongly expressed in nephridia only, all the other studied molecules are abundantly present in skin, coelomic epithelium, renal papillae and nephridia and hepatic coecum. Thus, it is possible to hypothesize that also in lancelet, as in fish, these organs are involved in pH control and ionic regulation. In the digestive tract of B. floridae, the intestine epithelium was weakly immune-reactive to all tested antibodies, while the hepatic coecum showed an intense immunoreactivity to all molecules. Since in amphioxus the hepatic coecum functions simultaneously as stomach, liver and pancreas, these immunohistochemical results proved the secretion of H+ and HCO3 − ions, typical of digestive process. Colocalization studies indicated a co-expression of the studied proteins in all considered organs, excluding NHE and pendrin for renal papillae, since some renal papillae are NHE immunopositive only.

      PubDate: 2017-12-01T04:35:31Z
      DOI: 10.1016/j.acthis.2017.10.011
       
  • Vitamin E can improve behavioral tests impairment, cell loss, and dendrite
           changes in rats’ medial prefrontal cortex induced by acceptable daily
           dose of aspartame
    • Authors: Ali Rafati; Ali Noorafshan; Mahboubeh Jahangir; Leila Hosseini; Saied Karbalay-Doust
      Abstract: Publication date: Available online 21 November 2017
      Source:Acta Histochemica
      Author(s): Ali Rafati, Ali Noorafshan, Mahboubeh Jahangir, Leila Hosseini, Saied Karbalay-Doust
      Aspartame is an artificial sweetener used in about 6000 sugar-free products. Aspartame consumption could be associated with various neurological disorders. This study aimed to evaluate the effect of aspartame onmedial Prefrontal Cortex (mPFC) as well as neuroprotective effects of vitamin E. The rats were divided into seven groups, including distilled water, corn oil, vitamin E (100mg/kg/day), and low (acceptable daily dose) and high doses of aspartame (40 and 200mg/kg/day) respectively, with or without vitamin E consumption, for 8 weeks. Behavioral tests were recorded and the brain was prepared for stereological assessments. Novel objects test and eight-arm radial maze showed impairmentoflong- and short-termmemoriesin aspartame groups. Besides, mPFC volume, infralimbic volume, neurons number, glial cells number, dendrites length per neuron,and number of spines per dendrite length were decreased by 7–61% in the rats treated with aspartame. However, neurons’ number, glial cells number, and rats’ performance in eight-arm radial mazes were improved by concomitant consumption of vitamin E and aspartame. Yet, the mPFC volume and infralimbic cortex were protected only in the rats receiving the low dose of aspartame+vitamin E. On the other hand, dendrites length, spines number,and novel object recognition were not protected by treatment with vitamin E+aspartame. The acceptable daily dose or higher doses of aspartame could induce memory impairments and cortical cells loss in mPFC. However, vitamin E could ameliorate some of these changes.

      PubDate: 2017-12-01T04:35:31Z
      DOI: 10.1016/j.acthis.2017.11.004
       
  • Specific localization of manserin peptide in the rat carotid body
    • Authors: Michiru Ida-Eto; Takeshi Ohkawara; Masaaki Narita
      Abstract: Publication date: Available online 21 November 2017
      Source:Acta Histochemica
      Author(s): Michiru Ida-Eto, Takeshi Ohkawara, Masaaki Narita
      The carotid body, located at the bifurcation of the common carotid artery, is a small sensory organ that detects changes in oxygen concentration and plays a vital role in controlling respiration. Although several molecules, such as neurotransmitters and neuropeptides, are involved in the regulation of the respiratory system, their detailed mechanisms have not been established yet. This study identifies that the presence of manserin, a neuropeptide, in the carotid body may play a crucial role in regulating respiration. The carotid bodies of adult Wistar rats were perfused with paraformaldehyde, and the frozen sections were subjected to immunohistochemical analyses. The carotid body comprises two distinct types of cells, neuron-like glomus cells and glial-like sustentacular cells. We used specific antibodies to distinguish the specific location of manserin in the carotid body, which included a tyrosine hydroxylase-positive antibody for glomus cells and an S100 protein antibody for sustentacular cells. Immunofluorescence analysis revealed that while tiny, round signals were exclusively observed in the cytoplasm of glomus cells, no signals were observed in sustentacular cells. Because manserin is believed to be secreted from precursor proteins by the endoproteolytic processing of a large precursor protein called secretogranin II, manserin secretion systems may exist in the carotid body, and thus, behave as potential regulators of respiration in the carotid body.

      PubDate: 2017-12-01T04:35:31Z
      DOI: 10.1016/j.acthis.2017.10.006
       
  • The molecular phenotypes of ureteral telocytes are layer-specific
    • Authors: M.A. Dobra; A.D. Vrapciu; F. Pop; N. Petre; M.C. Rusu
      Abstract: Publication date: Available online 16 November 2017
      Source:Acta Histochemica
      Author(s): M.A. Dobra, A.D. Vrapciu, F. Pop, N. Petre, M.C. Rusu
      Telocytes (TC) are the delicate interstitial (stromal) cells defined by their long, thin and moniliform processes termed telopodes. Numerous studies determined that different subsets of telocytes populate almost all tissues and attempted to relate these subsets to various functions, from cell signaling to tissue repair and regeneration. Extremely few studies addressed the urinary tract though few data on the molecular pattern of the urinary TCs actually exist. We therefore hypothesized that subsets of urinary TCs co-localize within the human ureter and we aimed at performing an immunohistochemical study to evaluate the tissue-specific molecular pattern of TCs. On sample tissues of proximal ureter drawn from ten human adult patients during surgery were applied primary antibodies against CD34, CD105, von Willebrand Factor, the heavy chain of smooth muscle myosin (SMM) and c-erbB-2. The molecular pattern indicated three different subsets of ureteral TCs which are neither endothelial nor epithelial in nature: (a) type I: the CD34-/CD105+ TCs of the superficial layer of lamina propria; (b) type II: the CD34+/CD105± myoid TCs of the deep layer of lamina propria and (c) type III: the CD34+/CD105+ perivascular TCs. Although apparently different, all these subsets of TCs could belong to the stem/progenitor niche of the ureter.

      PubDate: 2017-12-01T04:35:31Z
      DOI: 10.1016/j.acthis.2017.11.003
       
  • Bone marrow adipocytes in haematological malignancies
    • Authors: Ewa Frączak; Mateusz Olbromski; Aleksandra Piotrowska; Natalia Glatzel-Plucińska; Piotr Dzięgiel; Jarosław Dybko; Kazimierz Kuliczkowski; Tomasz Wróbel
      Abstract: Publication date: Available online 14 November 2017
      Source:Acta Histochemica
      Author(s): Ewa Frączak, Mateusz Olbromski, Aleksandra Piotrowska, Natalia Glatzel-Plucińska, Piotr Dzięgiel, Jarosław Dybko, Kazimierz Kuliczkowski, Tomasz Wróbel
      Bone marrow adipocytes (BMAs) derived from mesenchymal stem cells (MSC) are an active and significant element of the bone marrow microenvironment. They are involved in metabolic functions, complex interactions with other stromal cells, and in the development and progression of tumours. Currently, there is little data regarding the role of BMAs in haematological malignancies. Due to this, we have attempted to characterise the BMAs in these malignancies in terms of quantity and morphology. Our study included 30 patients aged 22–76 with myelo- (n=17) and lymphoproliferative malignancies (n=13), both with and without bone marrow infiltration. Trepanobioptate was the evaluated material. The number and diameter of BMAs were measured, and the percentage of adipocytes (adipocyte fraction – AF), hematopoietic cells (hematopoietic fraction – HF) and trabecular bone (trabecular bone fraction – BF) was calculated. The obtained results were considered against the clinical parameters of age, sex, body weight, body surface area (BSA) and body mass index (BMI). We observed that as age increases, the number of BMA/mm2, the diameter of adipocytes and AF increase while BF and HF decrease. However, this relationship was not statistically significant. A significant correlation of BMA parameters was also not found in relation to weight, BMI and BSA, and the number and diameter of BMAs were comparable in both sexes. The trepanobioptate of infiltrated bone marrow showed a decreased number of BMA/mm2 compared to the trepanobioptate from bone marrow without infiltration (97.44±69.16 vs. 164.14±54.16; p=0.010) with a marked difference in men (69.75±65.26 vs. 180.33±60.40; p=0.007). These trepanobioptate also showed an increase in the number of BMA/mm2 with age (r=0.472; p=0.041), and with an increase of BMI, an increase in diameter of BMAs (r=0.625; p=0.007) and AF (r=0.546; p=0.023). The number and size of BMAs, as well as AF, BF and HF in patients with myeloproliferative malignancies did not differ significantly compared to patients with lymphoproliferative malignancies.

      PubDate: 2017-11-20T03:10:35Z
      DOI: 10.1016/j.acthis.2017.10.010
       
  • Cyclin-dependent kinase 5 regulates MAPK/ERK signaling in the skin of mice
    • Authors: Xuexian Liu; Pengqian Zhang; Kaiyuan Ji; Junzhen Zhang; Shanshan Yang; Bin Du; Shuaipeng Hu; Ruiwen Fan
      Abstract: Publication date: Available online 11 November 2017
      Source:Acta Histochemica
      Author(s): Xuexian Liu, Pengqian Zhang, Kaiyuan Ji, Junzhen Zhang, Shanshan Yang, Bin Du, Shuaipeng Hu, Ruiwen Fan
      Cyclin-dependent kinase 5 (CDK5) is a proline-directed serine/threonine kinase that has been shown to play important roles in many tissues except the nervous system. We previously reported that CDK5 showed differential expression in the transcriptome profiles of the skin of alpacas with different hair colors. To understand the functional role of CDK5 in hair color determination, we constructed CDK5-knockdown mice and identified the effect on the mitogen-activated protein kinase (MAPK) pathway in the mouse skin. Quantitative real-time polymerase chain reaction, co-immunoprecipitation, and western blotting were performed to analyze the effects of CDK5-knockdown on the MAPK pathway in mice. The results showed that MAP3K6 was inhibited by phosphorylated CDK5 through its activator CDK7. The decrease in MAP3K6 levels caused down-regulation of MEK1 and ERK expression, leading to the up-regulation of miR-143-3p, which targets MAP3K6 via Dicer. Taken together, our findings indicate that CDK5 functions in regulating the MAPK pathway. Given that MAP3K6 was inhibited in two directions, this mechanism can provide insight into the contributions of the MAPK/ERK pathway to the inhibition of melanin production.

      PubDate: 2017-11-12T01:00:23Z
      DOI: 10.1016/j.acthis.2017.10.009
       
  • Quercetin protects jejunal mucosa from experimental intestinal ischemia
           reperfusion injury by activation of CD68 positive cells
    • Authors: Kristina Curgali; Stefan Toth; Zuzana Jonecova; Milan Maretta; Theodoros Kalpakidis; Ivana Petriskova; Matus Kusnier; Jan Soltes; Martin Svana; Martin Caprnda; Delian Delev; Luis Rodrigo; Eva Mechirova; Peter Kruzliak
      Abstract: Publication date: Available online 10 November 2017
      Source:Acta Histochemica
      Author(s): Kristina Curgali, Stefan Toth, Zuzana Jonecova, Milan Maretta, Theodoros Kalpakidis, Ivana Petriskova, Matus Kusnier, Jan Soltes, Martin Svana, Martin Caprnda, Delian Delev, Luis Rodrigo, Eva Mechirova, Peter Kruzliak
      The aim of our study was to analyse the possible protective effect of quercetin application during the jejunal ischemia-reperfusion injury (IRI) in rats. Quercetin was administered intraperitoneally 30min before 1h ischemia of superior mesenteric artery with following 24h lasting reperfusion period. The male specific pathogen-free (SPF) Charles River Wistar rats were used. In the group with applied quercetin, the significantly increased (p< 0.001) levels of anti-inflammatory cytokine IL10 were observed both in the blood serum and jejunal tissue. The improvement of the mucosal tissue morphology and proliferating and DNA repairing cell number measured by PCNA activity were recorded by more than 30% higher in the quercetin group. Simultaneously, significant elongation of the intestinal glands (p< 0.001) and increase in the number of CD68-positive cells in the lamina propria mucosae (p< 0.001) in comparison with control group were found. Based on our results, the preventive application of quercetin before induction of jejunal IRI stimulates faster jejunal mucosa restoration and it seems to have immunomodulatory and anti-inflammatory effects as well. CD68-positive macrophages could have crucial role in this process since they work as both growth factor and cytokine producers.

      PubDate: 2017-11-12T01:00:23Z
      DOI: 10.1016/j.acthis.2017.11.001
       
  • Olive oil polyphenols extracts inhibit inflammatory markers in J774A.1
           murine macrophages and scavenge free radicals
    • Authors: Marwa Abdallah; Stefania Marzocco; Simona Adesso; Mokhtar Zarrouk; Mokhtar Guerfel
      Abstract: Publication date: Available online 8 November 2017
      Source:Acta Histochemica
      Author(s): Marwa Abdallah, Stefania Marzocco, Simona Adesso, Mokhtar Zarrouk, Mokhtar Guerfel
      Here we evaluate the olive oil antiradical and anti-inflammatory potential through its polyphenols extracts and examine the influence of olive maturity on olive oil quality properties, polyphenols composition and biological potentials. Samples have been obtained from minor Tunisian olive cultivars (Chemchali, Fouji and Zarrazi) at different maturity indices. Principal quality properties were evaluated and polyphenols analysis was carried out by Folin Ciocalteu reagent and HPLC-UV-MS. Antiradical activity was examined by DPPH and FRAP scavenging assays while J774A.1 murine macrophages were used to evaluate anti-inflammatory potential by analyzing NO production with Griess reagent method and iNOS and COX-2 expression by cytofluorimetric analysis. Our results revealed that quality characteristics, total phenol content, as well as phenolic compound concentrations were significantly affected by the olive maturity levels. On the other hand, the polyphenols extracts showed an interesting radical scavenging capacity and a potential ability to inhibit inflammatory markers at 90% for NO release and 75% for iNOS expression. Thus, our study establishes that olive oil through its polyphenols extracts has a substantial antiradical and anti-inflammatory potential. Likewise a lot of attention should be attributed to olive ripening level in order to decide the optimum harvesting time.
      Graphical abstract image

      PubDate: 2017-11-12T01:00:23Z
      DOI: 10.1016/j.acthis.2017.10.005
       
 
 
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