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- W2066195279 abstract "Background/Aims: The regulation of three major intracellular signalling protein kinases was investigated in two models of liver injury leading to hepatic fibrosis, dimethylnitrosamine administration (DMN) and bile duct ligation (BDL).Methods: Extracellular signal-regulated kinases (ERK)1/2, c-Jun terminal kinase (JNK) and p70S6-kinase (p70S6K) were studied in vivo in the whole liver, in liver sections and in isolated hepatocytes, cholangiocytes and hepatic stellate cells (HSC).Results: In the whole liver, activation of these kinases occurred with a different kinetic pattern in both models of liver injury. By immunohistochemistry and Western blot in isolated cells, phosphorylated kinases were detected in proliferating cells (i.e. hepatocytes and cholangiocytes after DMN and BDL, respectively), in addition to stellate-like elements. ERK1/2, JNK and p70S6K activation was associated with hepatocytes proliferation after DMN, while JNK activation was not associated with cholangiocytes proliferation after BDL. In HSC isolated from injured livers, protein kinases were differentially activated after BDL and DMN. Kinases activation in HSC in vivo preceded cell proliferation and alpha-smooth muscle actin appearance, a marker of HSC transformation in myofibroblast-like cells, and collagen deposition.Conclusions: Our findings indicate that these kinases are coordinately regulated during liver regeneration and suggest that their modulation could be considered as a future therapeutic approach in the management of liver damage." @default.
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- W2066195279 date "2003-01-01" @default.
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- W2066195279 title "362 The direct role of hepatitis C virus core protein influencing on liver fibrogenesis: study using co-culture system" @default.
- W2066195279 doi "https://doi.org/10.1016/s0270-9139(03)80405-6" @default.
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