[Gene expression profiling in the first twelve weeks of treatment in chronic hepatitis C patients]

Gene expression profiling in the first weeks of treatment of patients with chronic hepatitis C may contribute to better evaluate the response to interferon-based therapy. The objective of this study was to evaluate the gene expression profiles of early responders and non-responders before, and after 12 weeks of treatment with peginterferon alfa and ribavirin.Gene expression profiles were analysed in 12 patients with chronic hepatitis C, and scheduled for treatment with peginterferon alpha and ribavirin.Of the 12 patients studied, six showed a complete early virological response, while six failed to control viremia. In early responders, treatment with peginterferon and ribavirin induced an increased expression of a larger number of interferon-induced genes (ISG15, IFI6, IFI44L, IFI27, MX1, OASL, IRF7, IFIT3, IFITM1, EIF2AK2, HERC5 and APOBEC3) than in non-responders (ISG15, IFI44L, IFI27, IRF7, USP18) in the first twelve weeks of treatment (P0.05). In both groups, there were changes in the levels of certain genes poorly described in the treatment of hepatitis C so far.The gene expression profiles described in this study provide a new insight to understanding the pathogenesis of the disease and treatment effect. The more marked effect of the treatment on the expression of interferon-response genes observed in early responders could explain their better control of viral load.