HIV-1 TAR Element and Its Role in Viral MicroRNA Production
Author Information
Author(s): Zachary Klase, Kale Prachee, Rafael Winograd, Madhur V Gupta, Mohammad Heydarian, Reem Berro, Timothy McCaffrey, Fatah Kashanchi
Primary Institution: The George Washington University School of Medicine
Hypothesis
The HIV-1 TAR element is processed by Dicer to yield a viral micro-RNA involved in chromatin remodeling of the viral LTR.
Conclusion
The HIV-1 TAR element is processed by the Dicer enzyme to create a viral miRNA that contributes to viral latency.
Supporting Evidence
- Dicer is expressed in CD4+ T-cells, suggesting a role in HIV-1 latency.
- Dicer binds to the HIV-1 TAR structure, indicating potential processing into miRNA.
- HIV-1 infected cells produce a TAR derived miRNA that can regulate viral gene expression.
Takeaway
This study shows that a part of the HIV virus can be turned into a tiny RNA that helps the virus stay hidden in the body.
Methodology
The study involved analyzing Dicer expression in various cell types, performing pull-down assays to test Dicer binding to TAR RNA, and using RNase protection assays to detect TAR-derived miRNA in HIV-1 infected cells.
Limitations
The study does not rule out the involvement of other processing pathways for the production of the viral miRNA.
Digital Object Identifier (DOI)
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