Cellular microRNA and P bodies modulate host-HIV-1 interactions.
Cellular microRNA and P bodies modulate host-HIV-1 interactions.
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DOI:
10.1016/j.molcel.2009.06.003
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发表时间:
2009-06-26
期刊:
影响因子:
16
通讯作者:
Rana, Tariq M.
中科院分区:
文献类型:
--
作者:
Nathans, Robin;Chu, Chia-ying;Serquina, Anna Kristina;Lu, Chih-Chung;Cao, Hong;Rana, Tariq M.
MicroRNAs (miRNAs), ~22-nucleotide noncoding RNAs, assemble into RNA-induced silencing complexes (RISC) 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.
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