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miR-122-based therapies select for three distinct resistance mechanisms based on alterations in RNA structure. | LitMetric

AI Article Synopsis

Article Abstract

Hepatitis C virus (HCV) is a positive-sense RNA virus that interacts with a liver-specific microRNA called miR-122. miR-122 binds to two sites in the 5' untranslated region of the viral genome and promotes HCV RNA accumulation. This interaction is important for viral RNA accumulation in cell culture, and miR-122 inhibitors have been shown to be effective at reducing viral titers in chronic HCV-infected patients. Herein, we analyzed resistance-associated variants that were isolated in cell culture or from patients who underwent miR-122 inhibitor-based therapy and discovered three distinct resistance mechanisms all based on changes to the structure of the viral RNA. Specifically, resistance-associated variants promoted riboswitch activity, genome stability, or positive-strand viral RNA synthesis, all in the absence of miR-122. Taken together, these findings provide insight into the mechanism(s) of miR-122-mediated viral RNA accumulation and provide mechanisms of antiviral resistance mediated by changes in RNA structure.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8379925PMC
http://dx.doi.org/10.1073/pnas.2103671118DOI Listing

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