Abstract
Hepatocyte transplantation is considered an alternative to whole organ transplantation. However, the availability of human cadaveric livers for the isolation of transplantation-quality hepatocytes is increasingly restricted. Xenogeneic porcine hepatocytes may therefore serve as an alternate cell ressource. The propagation of hepatocytes is often necessary to yield a sufficient cell number for downstream applications in xenotransplantation and in, for example, bioartificial liver support or pharmacological and toxicological studies. Our goal has been to propagate primary porcine hepatocytes in vitro and to determine the functional maintenance of the propagated cells. Porcine hepatocytes were cultured under serum-free conditions in the presence of hepatocyte growth factor and epidermal growth factor and passaged several times. The viability, proliferation and maintenance of liver-specific functions were determined as culture proceeded. Total cell number increased by 12-fold during four sequential passages, although the proliferative capacity was higher in primary cells and early passages as compared with late passages. Xenobiotics metabolism and urea synthesis gradually decreased with ongoing culture but could be restored by treatment with appropriate stimuli such, as β-naphthoflavone and cAMP. The expression of hepatocyte-specific genes was generally lower at the beginning than at later time-points of culture of individual passages. Porcine hepatocytes can thus be propagated in vitro. The partial loss of hepatocyte function may be restored in vitro by appropriate stimuli. This may also be achieved in a recipient liver after hepatocyte transplantation provided that the proper physiological environment for the maintenance of the differentiated hepatocyte phenotype is present.
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The excellent technical assistance of S. Ebensing and M. Hempel, First Department of Internal Medicine, University of Halle/Saale is acknowledged.
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This study was supported by grants to B. Christ from the German Ministry of Education and Research (01 ZZ 0109 and NBL3-NG4) as well as by grants from the Federal State of Saxonia-Anhalt through the Wilhelm-Roux-Program at the Medical Faculty of the Martin-Luther-University of Halle-Wittenberg to B. Christ (09/07 and 04/03).
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Schneider, C., Aurich, H., Wenkel, R. et al. Propagation and functional characterization of serum-free cultured porcine hepatocytes for downstream applications. Cell Tissue Res 323, 433–442 (2006). https://doi.org/10.1007/s00441-005-0089-9
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DOI: https://doi.org/10.1007/s00441-005-0089-9