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Published on: June 23, 2011
Canventol inhibits HIV-1 replication by Tat-induced Tar-independent mechanism
1Division of Cell Growth and Regulation, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts, U.S.A.
Summary:
Canventol (2-isopropyl-4-isopropyldencyclohex-2-ene-l-ol), a blocker of tumor necrosis factor alpha (TNF-alpha) release, inhibits human immunodeficiency virus type (HIV-1) production in chronically and acutely infected cells. This effect of Canventol on virus replication could be correlated with its inhibitory influence on necrosis factor (NF)-kappa B activation and HIV-1 long terminal repeat (LTR)-driven reporter gene expression in Jurkat cells and these could be overcome by the administration of TNF-alpha. Canventol inhibits activation of the promoter by the viral protein Tat through a TAR-independent mechanism. The HIV-1 promoter is synergistically upregulated when both the TAR-independent and the TAR-dependent modes of Tat action are in operation. Tat-induced downstream events, such as the production of cytokines like TNF-alpha and NF-kappa B activation, are central for this upregulation. Inhibitors of the respective modes of action of Tat downregulate HIV-1 LTR activation and virus replication.
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