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. 1995 Sep;147(3):707–717.

Hepatocytic differentiation of cultured rat pancreatic ductal epithelial cells after in vivo implantation.

J R Chen 1, M S Tsao 1, W P Duguid 1
PMCID: PMC1870971  PMID: 7677182

Abstract

We have investigated the differentiation potential of propagable cultured rat pancreatic duct epithelial cells after in vivo implantation in isogeneic Fischer-344 rats. Cells genetically labeled with Escherichia coli beta-galactosidase (lacZ) reporter gene were embedded in a mixture of collagen and Matrigel (basement membrane matrix) and implanted either subcutaneously or intraperitoneally. Tissues from the two locations were harvested 4 to 8 weeks later. The great majority of the lacZ-labeled epithelial cells colonizing both sites phenotypically resembled hepatocytes, although they demonstrated different degrees of hepatocytic differentiation. Less than 5% of lacZ-labeled cells formed ductular structures. The hepatocyte-like cells from the subcutaneous implantation site expressed mixed phenotypes of both hepatocyte and ductal cell, including the expression of alpha-fetoprotein, tyrosine amino-transferase, gamma-glutamyl transpeptidase, carbonic anhydrase II, and cytokeratin 19. In contrast, the hepatocyte-like cells colonizing the mesentery showed the phenotype of mature hepatocytes, including an abundant glycogen storage and a lack of alpha-fetoprotein and carbonic anhydrase II expressions. Neither acinar cell nor endocrine differentiation was seen. These findings demonstrate that pancreatic ductal cells can be the progenitor cell for transdifferentiated hepatocytes.

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