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Liver cirhosis is one of the major complications of hepatitis C virus (HCV) infection, but the me-chanisms underlying HCV-related fibrogenesis are stil not clear. Although the roles of HCV core protein remain poorly understood, it is supposed to play an important role in the regulation of celular growth and hepatocarcinogenesis. The aim of this study was to examine the role of HCV established an in vitro co-culture system with primary hepatic stellate cel (HSC) isolated from rats, and a stable HepG2-HCV core cell line which had been transfected with HCV core gene. The expressions of fibrosis-related molecules trans-forming growth factor β1 (TGF-β1), transforming growth factor β receptor II (TGFβRII), α-smoth muscle actin (α-SMA) and conective tisue growth factor (CTGF) were analyzed via histo-pression levels of matrix metaloprotinase-2 (MP- 2) and colagen type I (Col I) from the co-cultured media were measured by zymogram and ELISA, respectively. The expresions of α-SMA, TGF-β1, Col I, TGFβRII and MP-2 were significantly in-creased in the co-culture of stable HepG2-HCV core with HSC. Moreover, the significant increases of CTGF and TGF-β1 in the HCV core- expresing cels were observed by either Northern or Wes-tern blot analysis. These results sugest that HCV core protein may contribute to the hepatic fibro-via up-regulation of CTGF and TGF-β1.

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