Liu Y, Li JL, Shi XL, Fang S, Qiu YD. Identification and differentiation into hepatocyte-like cells of mouse marrow stromal stem cells
in vitro.
Shijie Huaren Xiaohua Zazhi 2008;
16:4051-4055. [DOI:
10.11569/wcjd.v16.i36.4051]
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Abstract
AIM: To isolate and identify mouse marrow stromal stem cells (MSCs), then to explore whether MSCs cultured in the directed differentiation media including HGF, EGF and FGF-4 could differentiate into hepatocytes.
METHODS: Bone marrow cells were collected from C57BL/6 mouse by density gradient centrifugalization, and were purified by adherent culture. Cell morphology was observed, and cell surface markers were identified by flow cytometry. MSCs were cultured in the directed differentiation media including HGF, EGF and FGF-4, and the expression patterns of some genes of the hepatocytes, AFP, ALB and CK18 were validated and confirmed by RT-PCR. The ALB and CK18 expressed cells were confirmed by Western blot.
RESULTS: Cell morphology tended to be uniform fusiform shape with passage. The percentage of hematopoietic lineage marker CD45 decreased from 86.49% to 2.77% while the percentage of CD90 increased obviously from 25.42% in primary culture cells to 93.47% at the fifth generation. AFP mRNA expression appeared on culture day 7 and decreased in the later days; ALB and CK18 mRNA expression also appeared on culture day 7, but increased with the differentiation of MSCs. ALB and CK18 were confirmed to express in the differentiated MSCs by Western blot analysis.
CONCLUSION: MSCs can be isolated and purified in vitro, then induced to differentiate into hepatocytes or hepatocyte-like cells by directed differentiation media including HGF, EGF and FGF-4.
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