Hepatitis C virus proteins do not directly trigger fibrogenic events in cultured human liver myofibroblasts

Tan, K. and Guibert, C. and Neaud, V. and Rosenbaum, J.. (2003) Hepatitis C virus proteins do not directly trigger fibrogenic events in cultured human liver myofibroblasts. Journal of Viral Hepatitis, 10 (6). pp. 427-432.

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Although liver fibrosis is the major complication of hepatitis C virus (HCV) infection, the mechanisms of fibrogenesis in this setting are not completely understood. The aim of this study was to test the direct effect of HCV proteins on signalling- and fibrosis-related events in cultured human liver myofibroblasts, the effector cells of liver fibrogenesis. Cultured myofibroblasts were exposed to recombinant HCV core, a structural protein, and nonstructural proteins (NS) 3, NS 4 and NS 5. HCV proteins did not significantly increase DNA synthesis in myofibroblasts. We then examined if these proteins affected early signalling events. None of the HCV proteins affected the phosphorylation of the mitogen activated protein kinases/extracellular regulated kinases 1 and 2, or of the phosphatidylinositol 3-kinase target, Akt. HCV proteins had also no effect on intracellular calcium concentration. In other experiments, fibrogenesis-related parameters were measured. None of the HCV proteins had any effect on the secretion of type I collagen, tissue inhibitor of matrix metalloproteinases type 1, gelatinase or urokinase. Alpha-smooth muscle actin expression was also not modified. In summary, our experiments do not support a direct effect of these HCV proteins on fibrogenic cells.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Neurobiology > Physiopathology of basal ganglia neuronal subcircuits (Tan)
UniBasel Contributors:Tan, Kelly
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:23 Nov 2017 09:51
Deposited On:23 Nov 2017 09:51

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