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Nat Med. 2009 Jan;15(1):31-3. doi: 10.1038/nm.1902. Epub 2009 Jan 4.

Decreased levels of microRNA miR-122 in individuals with hepatitis C responding poorly to interferon therapy.

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  • 1Department of Biomedicine, University of Basel, Basel, Switzerland.


Several microRNAs (miRNAs), including liver-specific miR-122, have been implicated in the control of hepatitis C virus (HCV) RNA replication and its response to interferon (IFN) in human hepatoma cells. Our analysis of liver biopsies from subjects with chronic hepatitis C (CHC) undergoing IFN therapy revealed no correlation of miR-122 expression with viral load and markedly decreased pretreatment miR-122 levels in subjects who had no virological response during later IFN therapy; other investigated miRNAs showed only limited changes. These data have implications for the prospect of targeting miRNAs for CHC therapy.

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