Journal of Capital Medical University ›› 2014, Vol. 35 ›› Issue (5): 608-616.doi: 10.3969/j.issn.1006-7795.2014.05.018

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Isolation and identification of human adipose tissue-derived mesenchymal stem cells and differentiation into hepatocyte-like cells in vitro

Zhang Yunwei1, Xu Lijuan1, Wang Shufang2, Yan Li1   

  1. 1. Department of Gastroenterology, Institute of Geriatrics, Beijing 100853, China;
    2. Department of Transfusion, Chinese People's Liberation Army General Hospital, Beijing 100853, China
  • Received:2014-07-30 Online:2014-10-21 Published:2014-10-20
  • Supported by:

    This study was supported by Beijing Health System Technical Personnel Project.

Abstract:

Objective To explore the method of isolation, culture and identification of human adipose-derived mesenchymal stem cells (hADSCs) and induce the hADSCs into hepatocyte-like cells in vitro.Methods hADSCs was obtained by collagenase I digestion centrifugation for primary culture and the stem cell surface antigens including CD13, CD73, CD34, CD45 and HLA-DR were determined by flow cytometry (FCM). The cells were induced into adipocytes and osteocytes by using induction medium. The hADSCs were induced by using the two-stage cytokine induction method and then the morphological changes were observed. The liver cell-related genes such as AFP, CK18, CK19 and so on were tested in the hepatocyte-like cells by RT-PCR. The expression of the above-mentioned molecules of the hepatocyte-like cells were tested by cell immunohisto- chemical method and glycogen synthesis function of the hepatocyte-like cells was tested by PAS staining. Results hADSCs obtained in the digestion centrifugation are of the uniform size and are fusiform fibroblast-like cells, their proliferation was good. Cells could survive and kept undifferentiated for a long time in vitro. Flow cytometry showed that cells highly expressed CD13, CD73, but the expression of CD34, CD45 and HLA-DR were low; hADSCs could be induced into adipocytes and osteocytes. After being induced into hepatocyte-like cells, the human adipose-derived cells, cellular morphology gradually became polygonal or round, showed high expression of liver cell-related gene, including alpha-fetal protein (AFP), albumin (ALB), and cytochrome CYP3A4. Besides, the obtained hepatocyte-like cells also expressed liver cell-related proteins incuding HepPar-1, AFP, CK18, CK19. PAS staining showed that the cytoplasm of hepatocyte-like cells were in red. Conclusion hADSCs could be isolated and obtained using digestion centrifugation, the obtained hADSCs could be repeatedly passaged and could survive for long time, and could be induced into functional hepatocyte-like cells in vitro, which provide experimental basis for ADSCs as seed cells of cell therapy, bioartificial liver and liver tissue engineering.

Key words: human adipose tissue-derived mesenchymal stem cells (hADSCs), isolation, identification, differentiation, hepatocyte-like cells

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