Platelet-derived growth factor C induces liver fibrosis, steatosis, and hepatocellular carcinoma.

نویسندگان

  • Jean S Campbell
  • Steven D Hughes
  • Debra G Gilbertson
  • Thomas E Palmer
  • Matthew S Holdren
  • Aaron C Haran
  • Melissa M Odell
  • Renay L Bauer
  • Hong-Ping Ren
  • Harald S Haugen
  • Matthew M Yeh
  • Nelson Fausto
چکیده

Members of the platelet-derived growth factor (PDGF) ligand family are known to play important roles in wound healing and fibrotic disease. We show that both transient and stable expression of PDGF-C results in the development of liver fibrosis consisting of the deposition of collagen in a pericellular and perivenular pattern that resembles human alcoholic and nonalcoholic fatty liver disease. Fibrosis in PDGF-C transgenic mice, as demonstrated by staining and hydroxyproline content, is preceded by activation and proliferation of hepatic stellate cells, as shown by collagen, alpha-smooth muscle actin and glial fibrillary acidic protein staining and between 8 and 12 months of age is followed by the development of liver adenomas and hepatocellular carcinomas. The hepatic expression of a number of known profibrotic genes, including type beta1 TGF, PDGF receptors alpha and beta, and tissue inhibitors of matrix metalloproteinases-1 and -2, increased by 4 weeks of age. Increased PDGF receptor alpha and beta protein levels were associated with activation of extracellular regulated kinase-1 and -2 and protein kinase B. At 9 months of age, PDGF-C transgenic mice had enlarged livers associated with increased fibrosis, steatosis, cell dysplasia, and hepatocellular carcinomas. These studies indicate that hepatic expression of PDGF-C induces a number of profibrotic pathways, suggesting that this growth factor may act as an initiator of fibrosis. Moreover, PDGF-C transgenic mice represent a unique model for the study of hepatic fibrosis progressing to tumorigenesis.

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عنوان ژورنال:
  • Proceedings of the National Academy of Sciences of the United States of America

دوره 102 9  شماره 

صفحات  -

تاریخ انتشار 2005