Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (32): 5118-5122.doi: 10.3969/j.issn.2095-4344.2015.32.007

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Hepatocyte proliferation and apoptosis under regulation of human telomerase reverse transcriptase gene-modified bone marrow mesenchymal stem cells

Bai Dong, Zhou Zhong-xiao, Zhang Jian   

  1. Third Department of General Surgery, Fengtian Hospital of Shenyang Medical College, Shenyang 110024, Liaoning Province, China
  • Online:2015-08-06 Published:2015-08-06
  • About author:Bai Dong, Master, Attending physician, Third Department of General Surgery, Fengtian Hospital of Shenyang Medical College, Shenyang 110024, Liaoning Province, China

Abstract:

BACKGROUND: Studies have shown that human telomerase reverse transcriptase gene (hTERT) transfection can significantly extend the life cycle of bone marrow mesenchymal stem cells so that the cells can continue to maintain pluripotency.
OBJECTIVE: To investigate the effects of hTERT gene-modified bone marrow mesenchymal stem cells on hepatocyte proliferation and apoptosis.
METHODS: Bone marrow mesenchymal stem cells from rats were isolated and cultured using direct adherent method. Then, hTERT eukaryotic expression plasmid, pCIneo-hTERT, was transferred into the cells using liposome transfection method. The hTERT-modified bone marrow mesenchymal stem cells were co-cultured with hepatocytes at 1:1 (observation group), and meanwhile, non-transfected bone marrow mesenchyam stem cells were co-cultured with hepatocytes at 1:1 (control group), and hepatocytes cultured alone served as single culture group. Effects of bone marrow mesenchymal stem cells on hepatocyte proliferation and apoptosis were observed by MTT assay and immunofluorescence staining.
RESULTS AND CONCLUSION: The proliferative rate of hepatocytes was significantly higher in the observation group than the control and single culture groups (P < 0.05), and the survival rate of hepatocytes was significantly higher in the observation group than the single culture group (P < 0.05). Experimental findings suggest  hTERT-modified bone marrow mesenchymal stem cells can inhibit hepatocyte apoptosis but promote hepatocyte proliferation, so as to improve hepatocyte function.

Key words: 干细胞, 骨髓干细胞, 人端粒酶反转录酶基因, 骨髓间充质干细胞, 肝细胞, 细胞增殖, 细胞凋亡

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