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Journal Article
Research Support, Non-U.S. Gov't
Toll-interacting protein inhibits HIV-1 infection and regulates viral latency.
Biochemical and Biophysical Research Communications 2016 June 25
HIV-1 latency is mainly characterized by a reversible silencing of long-terminal repeat (LTR)-driven transcription of provirus. The existing of repressive factors has been described to contribute to transcription silencing of HIV-1. Toll-interacting protein (Tollip) has been identified as a repressor of Toll like receptors (TLR)-mediated signaling. Our previous study has found that Tollip inhibited NF-κB-dependent HIV-1 promoter LTR-driven transcription, indicating the potential role of Tollip in governing viral latency. In this study, by using HIV-1 latently infected Jurkat T-cell and central memory CD4(+) T-cells, we demonstrate the role of Tollip in regulating HIV-1 latency, as the knock-down of Tollip promoted HIV-1 reactivation from both HIV-1 latently infected Jurkat CD4(+) T cells and primary central memory T cells (TCM). Moreover, we found that the activities of LTRs derived from multiple HIV-1 subtypes could be repressed by Tollip; Knock-down of Tollip promoted HIV-1 transcription and infection in CD4(+) T cells. Our data indicate a key role of Tollip in suppressing HIV-1 infection and regulating viral latency, which provides a potential host target for combating HIV-1 infection and latency.
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