Summary
The existence, origin, and bipotency of the hepatic stem cell (HeSC) have been investigated. However, the isolation and culture of HeSCs from adult liver tissue is not yet well established, and the mechanism by which HeSCs differentiate into mature cells remains unclear. On the other hand, the development of HeSC-isolating and-culturing methods and the in vitro clonal analysis of their mechanism of differentiation are required to enable clinical applications of regenerative medicine in the liver. For the purpose of providing HeSCs for these studies, we attempted to establish an HeSC line from a normal adult porcine liver using a unique culture system, a poly-D-lysine-coated culture dish with NAIR-1 medium (the PDL-NAIR-1 culture system). Moreover, we examined the differentiating capacity of HeSCs in vitro. We demonstrated that it was possible in the culture system that immature epithelial cells capable of proliferating grew selectively into aggregates and that two hepatic stem-like cell lines, PHeSC-A1 and PHeSC-A2, were established. The results from our data suggest that these hepatic stem-like cell lines were capable of self-renewing and differentiating into hepatocytes or biliary epithelial cells and show that the PDL-NAIR-1 culture system offers the immense advantage of isolating and culturing HeSCs from a normal adult liver. Furthermore, because of the ability to use a clonal analysis in vitro, these cell lines are useful for the investigation of various mechanisms in which HeSCs seem to participate and their application in the study of regenerative medicine in the liver.
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Kano, J., Ishiyama, T., Nakamura, N. et al. Establishment of hepatic stem-like cell lines from normal adult porcine liver in a poly-D-lysine-coated dish with nair-1 medium. In Vitro Cell.Dev.Biol.-Animal 39, 440–448 (2003). https://doi.org/10.1290/1543-706X(2003)039<0440:EOHSCL>2.0.CO;2
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DOI: https://doi.org/10.1290/1543-706X(2003)039<0440:EOHSCL>2.0.CO;2