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Journal Cover Biomedical Research and Therapy
  [4 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2198-4093 - ISSN (Online) 2198-4093
   Published by Vietnam National University Homepage  [1 journal]
  • Clinical application of stem cells: An update 2015

    • Authors: Phuc Van Pham
      Abstract: Stem cell transplantation has the long history of more than 50 years from the first bone marrow transplantation in 1957. From the 2000s, clinical applications of stem cells significantly increased with more diseases and more patients treated with stem cells. Both autologous stem cells and allogenic stem cells as well as adult stem cells and induced pluripotent stem cells (iPSCs), and both in vitro non-expanded stem cells and in vitro expanded stem cells were clinically applied. For adult stem cells, besides hematopoietic stem cells (HSCs), mesenchymal stem cells (MSCs), neural stem cells, endothelial progenitor cells, limbal stem cells… also were used in the treatment of some diseases. To the year 2015, applications of MSCs have dramatically increased when some MSCs based drugs that were approved and commercialized in some countries. About iPSCs, Japanese scientists also firstly applied the iPSCs in treatment of ophthalmological diseases. Currently, the European Medicines Agency approved the first expanded stem cell therapy to repair damaged cornea in the Europe. This review aimed to summarize, update clinical applications of stem cells to 2015.
      PubDate: 2016-01-31
      Issue No: Vol. 3, No. 1 (2016)
       
  • Culture and differentiation of cytokine-induced killer cells from
           umbilical cord blood-derived mononuclear cells

    • Authors: Binh Thanh Vu, Quyen Thanh-Ngoc Duong, Phong Minh Le, Phuc Van Pham
      Pages: 460 - 468
      Abstract: Cytokine-induced killer cells (CIK) are cytotoxic T cells, which have both NK and T cell properties. These cells are characterized by potent, non-MHC-restricted cytotoxicity and reduced alloreactivity, which make them appealing for use in adoptive immunotherapy of cancer and virus infections. In this study, CIK cells were generated by stimulating umbilical cord blood-derived mononuclear cells (UCB-MNCs) with interferon-gamma (IFN-g) on day 0. Anti-CD3 antibody and interleukin-2 (IL-2) were added after 24 hours at four different experimental concentration combinations in order to identify the optimal cytokine amounts for CIK cell proliferation. Cells were collected at four time points over a 21-day period (day 0, 7, 14, 21) for analysis of cell marker presentation using flow cytometry, as well as transcription-level cytokine production using RT-PCR. The results showed that in the 21-day culture, the average final expansion levels of CD3+CD56+ CIK cell were in the range of hundredfold, accounted for 26% in the bulk culture. Most important, these cells strongly expressed granzyme B (80.87%), a potent factor involved in cell-mediated cytotoxicity. These CIK cells also transcriptionally overexpressed the three cytokine genes that produce IFN-g, tumor necrosis factor-alpha (TNF-a), and IL-2; these are key for immune cell mobilization against tumors as well as foreign pathogens. Our research establishes an effective cytokine concentration and time protocol for use in generation of CIK cells from UCB-MNCs, potentiating greater applications of CIK cell-adoptive immunotherapy in both research and clinical settings. Thus, the 3­rd and 4th experimental conditions both stimulated CIK cell differentiation with 50 ng/ml of anti-CD3 antibody, but with IL-2 concentrations of 500 U/ml and 1000 U/ml, respectively.
      PubDate: 2016-01-27
      Issue No: Vol. 3, No. 1 (2016)
       
  • Significance of Mast cells in Non-neoplastic and Neoplastic lesions of
           Uterine Cervix

    • Authors: Kalyani R, Rajeshwari G
      Pages: 469 - 475
      Abstract: Background: Mast cells are involved in multiple biological events. The significance of mast cells in non-neoplastic and neoplastic lesions of cervix has been studied with conflicting results. Its presence in tumor has been described as evidence of host immunologic antitumor response, angiogenesis and tumor invasion. Aims/Objectives:  To study mast cell density in various cervical lesions using Toluidine blue stain; To compare the sections studied with conventional Toluidine blue staining and Toluidine blue staining by reducing the pH. Methodology: Cervical biopsy/hysterectomy specimens from archives of Department of Pathology were considered for the study. The sections were studied for histomorphology and mast cell density. The mast cell density was assessed by Toluidine blue staining by conventional method and another method by reducing pH using weak HCL. The stained slides were reviewed for mast cell density under 10 high power field and statistically analysed. Results: Total of 100 cases were studied. Normal cervix 7 cases with mean age of 44.29 and mast cell density (mean) of 45.43. Chronic cervicitis and polypoidal Endocervicitis were 26 and 28 cases, mean age of 45.38 years and 39.14 years and mean mast cell count of 48.38 and 66.96 respectively. Intraepithelial lesions and malignancy  were 23 and 16 cases, mean age of 43.56 years and 52.26 years and mean mast cell of 34.47and 34.6 respectively. Maximum number of mast cells was seen in polypoidal Endocervicitis and least number in Squamous cell carcinoma of cervix. Conclusion: The role of mast cell differs in inflammatory and neoplastic lesions of cervix. Mast cells has active role in inflammatory lesions.
      PubDate: 2016-01-27
      Issue No: Vol. 3, No. 1 (2016)
       
  • A pilot study of comorbidities in patients with Rheumatoid Arthritis at a
           tertiary care hospital in Northeast India

    • Authors: Sukhjinder Singh, Ratan J. Lihite, Chitralekha Baruah, Mangala Lahkar, Prashant Kumar Singh
      First page: 454
      Abstract: On an average, rheumatoid arthritis is associated with one or more comorbid conditions and these comorbidities are associated with various risk factors and medications use in patients with RA. The aim of this study was to assess comorbidities in patients with RA at a tertiary care hospital of Northeast India. This cross sectional study was conducted for 8 months from August 2014 to April 2015. The data was collected from medicine (unit-III) outpatient department of Gauhati Medical College and Hospital, Guwahati, Northeast India. Fifty one RA patients were found during study period. Patient’s socio-demographic characteristics, comorbidities, risk factors for comorbidities, laboratory investigations, and past & current medications use were collected during their visit to hospital. DAS28 scale was used to assess the disease activity in RA patients. Descriptive statistics were used. Non-normally distributed continuous variables are presented in median and interquartile range. The median age of RA patients was 45(IQR;15). The disease activity was found high (DAS-ESR>5.1) in 34 (66.67%) patients. The median DAS28 score was 5.64(IQR;1.44). Majority of the patients with RA were anaemic (n=34, 66.67%) followed by infection (n=7, 13.73%), thyroid disease (n=5, 9.80%), renal disease (n=4, 7.84%), osteoporosis (n=3, 5.88%), cardiovascular disease (n=3, 5.88%), lung disease (n=3, 5.88%), and vasculitis (n=1, 1.96%). The commonly reported risk factor was hypertension (19.61%) followed by diabetes (n=5, 9.80%), dyslipidemia (n=4, 7.84%), smoking (n=4, 7.84%), family history of CVD (n=2, 3.92%), and alcohol intake (n=1, 1.96%). Among DMARDS, methotrexate (92.16%) was the most commonly prescribed drug followed by hydroxychloroquine (74.51%) and sulfasalazine (27.45%). Anaemia was the most common comorbid condition found in RA patients. Disease activity was found high in anaemic patients with RA.
      PubDate: 2016-01-19
      Issue No: Vol. 2, No. 12 (2016)
       
  • Evaluation in vitro senescence of mesenchymal stem cells isolated from
           mouse bone marrow and adipose tissue

    • Authors: Sinai Walker, Gene Sam, Martin Hill, Matthie Robert
      Abstract: Mesenchymal stem cells (MSCs) from bone marrow and adipose tissue are intensively used for regenerative medicine. This study aimed to compare the in vitro senescence of MSCs isolated from adipose (BM-MSCs) and bone marrow tissues (ADSCs). Both BM-MSCs and ADSCs were isolated from the same mice, and sub-cultured to 3rd passage. These MSCs were assessed cell proliferation, senescence associated beta-galactosidase staining, and telomere length as well as stemness marker expression. The results showed that both BM-MSCs and ADSCs would go to senescence after long-term culture. BM-MSCs significantly decreased the proliferation rate after passage 20, while ADSCs could strongly proliferate to passage 50. Based on beta-galactosidase expression, BM-MSCs also were positive sooner than ADSCs (passage 10 vs. passage 20, respectively). At these passages, both BM-MSCs and ADSCs exhibited the shortening of telomere length from 10.4 to 5.2 kbps in passage 3 to senescent cultures, respectively. In conclusion, MSCs from bone marrow appear to senesce much earlier than those from adipose tissue. These results suggested that numbers of sub-culture should be controlled to get MSCs in good status for research or application.
      PubDate: 2015-08-01
      Issue No: Vol. 2, No. 8 (2015)
       
  • Retinoic acid improves the cisplatin effect on tumor initiating cells in
           liver cancer

    • Authors: Julie Arnold, William Hwang, Sudipto Bari, Hong Zhang
      Abstract: In recent years, cisplatin is used in hepatocellular carcinoma (HCC) treatment as adjuvant treatment for post-operation patients. However, its efficiency also was largely limited because of the high incidence of chemoresistance. It was the aim of this study to assess the effects of cisplatin in combination with retinoic acid (RA) on differentiation and apoptosis of tumor-initiating cells (TICs) in human HCC. In this study, TICs would be treated cisplatin+RA and cisplatin or RA alone as the controls. The TIC differentiation was evaluated by phenotype changes while TIC apoptosis was evaluated by PI-annexin V assay. The results showed that RA effectively induced differentiation of TICs, which potentiated the cytotoxic effects of cisplatin. The combinatorial treatment of RA and cisplatin significantly promoted apoptosis, and differentiation of human TICs compared to the treatment with either drug alone. These findings demonstrated that the combination of RA with cisplatin may be a promising strategy in HCC treatment.
      PubDate: 2015-07-01
      Issue No: Vol. 2, No. 8 (2015)
       
  • Characterization and expression of pluripotency markers in human dental
           pulp stem cells

    • Authors: Miglino Maria, Laurino Carlos, Rosalia Mendez-Otero, Natasha Machado
      Abstract: Human dental pulp stem cell (DPSC) is new source of stem cells. In this study, we characterized expression of pluripotency markers such as Oct-3/4, Sox-2, and Nanog in DPSCs. DPSCs were isolated according to the published procedure. They were sub-cultured to 3rd passage and used for further experiments. Firstly, DPSCs were characterized with mesenchymal stem cell phenotypes included expression of CD29, CD44, CD73, CD90 and CD105; adipogenesis and osteogenesis differentiation. Secondly, DPSCs were checked expression of Oct-3/4, Sox-2, and Nanog by both RT-PCR, immunofluorescence. The results showed that DPSCs satisfied the minimal criteria of MSCs. Moreover, they also expressed the pluripotent markers Oct-3/4, Sox-2, and Nanog at both mRNA and protein level. Thus, these factors may have a potential role in influencing the high proliferation and differentiation of DPSCs. In conclusion, this result showed that DPSCs represent as autologous stem cell source with high potential for dental engineering as well as regenerative medicine.
      PubDate: 2015-07-01
      Issue No: Vol. 2, No. 8 (2015)
       
  • Hypoxia condition promoted the adipose derived stem cell proliferation via
           VEGF production

    • Authors: Phuc Van Pham, Ngoc Bich Vu, Nhung Hai Truong, Loan Thi-Tung Dang, Nhan Lu-Chinh Phan, Ngoc Kim Phan
      First page: 476
      Abstract: Adipose-derived stem cells (ADSCs) are a promising mesenchymal stem cells source with therapeutic applications. Some recent studies showed that ADSCs could be expanded in vitro without phenotype changes. This study aimed to evaluate the effect of hypoxia condition on ADSC proliferation in vitro and to determine the role of VEGF in ADSC proliferation. ADSCs were selectively cultured from stromal vascular fraction that obtained from adipose tissue in the DMEM/F12 medium supplemented with 10% FBS, 1% antibiotic-antimycotic. ADSCs were cultured in two conditions included hypoxia (5% O2) and normal oxygen (21% O2). Effects of oxygen concentration on cell proliferation were recorded by cell cycle and doubling time. Expression of VEGF was evaluated by real-time RT-PCR and ELISA assays. And the role of VEGF on ADSC proliferation was studied by neutralizing VEGF with anti-VEGF monoclonal antibody. The results showed that ADSC proliferation rate was increased 2.5 times in hypoxia compared to normal oxygen. And hypoxia condition, ADSCs also triggered VEGF synthesis at both mRNA and translational level. However, neutralizing VEGF with anti-VEGF monoclonal antibody significantly reduced the proliferation rate. These results suggested that hypoxia stimulated ADSC proliferation related to VEGF production. This finding will contribute not only in stem cell technology but also in obese treatment.
      PubDate: 2015-07-01
      Issue No: Vol. 2, No. 8 (2015)
       
 
 
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