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Combined agonist-antagonist genome-wide functional screening identifies broadly active antiviral microRNAs

Santhakumar, D., Forster, T., Laqtom, N. N., Fragkoudis, R., Dickinson, P., Abreu-Goodger, C., Manakov, S. A., Choudhury, N. R., Griffiths, S. J., Vermeulen, A., Enright, A. J., Dutia, B., Kohl, A., Ghazal, Peter ORCID: and Buck, A. H. 2010. Combined agonist-antagonist genome-wide functional screening identifies broadly active antiviral microRNAs. Proceedings of the National Academy of Sciences 107 (31) , pp. 13830-13835. 10.1073/pnas.1008861107

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Although the functional parameters of microRNAs (miRNAs) have been explored in some depth, the roles of these molecules in viral infections remain elusive. Here we report a general method for global analysis of miRNA function that compares the significance of both overexpressing and inhibiting each mouse miRNA on the growth properties of different viruses. Our comparative analysis of representatives of all three herpesvirus subfamilies identified host miRNAs with broad anti- and proviral properties which extend to a single-stranded RNA virus. Specifically, we demonstrate the broad antiviral capacity of miR-199a-3p and illustrate that this individual host-encoded miRNA regulates multiple pathways required and/or activated by viruses, including PI3K/AKT and ERK/MAPK signaling, oxidative stress signaling, and prostaglandin synthesis. Global miRNA expression analysis further demonstrated that the miR-199a/miR-214 cluster is down-regulated in both murine and human cytomegalovirus infection and manifests similar antiviral properties in mouse and human cells. Overall, we report a general strategy for examining the contributions of individual host miRNAs in viral infection and provide evidence that these molecules confer broad inhibitory potential against multiple viruses.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Publisher: National Academy of Sciences
ISSN: 0027-8424
Last Modified: 23 Oct 2022 14:16

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