UMass Chan AffiliationsProgram in Gene Function and Expression
Department of Biochemistry and Molecular Pharmacology
Document TypeJournal Article
MetadataShow full item record
AbstractMicroRNAs (miRNAs), approximately 22 nt noncoding RNAs, assemble into RNA-induced silencing complexes (RISCs) and localize to cytoplasmic substructures called P bodies. Dictated by base-pair complementarity between miRNA and a target mRNA, miRNAs specifically repress posttranscriptional expression of several mRNAs. Here we report that HIV-1 mRNA interacts with RISC proteins and that disrupting P body structures enhances viral production and infectivity. In HIV-1-infected human T lymphocytes, we identified a highly abundant miRNA, miR-29a, which specifically targets the HIV-1 3'UTR region. Inhibiting miR-29a enhanced HIV-1 viral production and infectivity, whereas expressing a miR-29 mimic suppressed viral replication. We also found that specific miR-29a-HIV-1 mRNA interactions enhance viral mRNA association with RISC and P body proteins. Thus we provide an example of a single host miRNA regulating HIV-1 production and infectivity. These studies highlight the significance of miRNAs and P bodies in modulating host cell interactions with HIV-1 and possibly other viruses.
SourceMol Cell. 2009 Jun 26;34(6):696-709. Link to article on publisher's site
Permanent Link to this Itemhttp://hdl.handle.net/20.500.14038/33073
Related ResourcesLink to Article in PubMed