Tannin inhibits HIV-1 entry into target cells. - GreenMedInfo Summary
Tannin inhibits HIV-1 entry by targeting gp41.
Acta Pharmacol Sin. 2004 Feb;25(2):213-8. PMID: 14769212
Institute of Pharmaceutical Sciences of the First Medical University of PLA, Key Lab of GD for Screening of New Drug, Guangzhou, Guangdong 510515, China.
AIM: To investigate the mechanism by which tannin inhibits HIV-1 entry into target cells. METHODS: The inhibitory activity of tannin on HIV-1 replication and entry was detected by p24 production and HIV-1-mediated cell fusion, respectively. The inhibitory activity on the gp41 six-helix bundle formation was determined by an improved sandwich ELISA. RESULTS: Tannins from different sources showed potent inhibitory activity on HIV-1 replication, HIV-1-mediated cell fusion, and the gp41 six-helix bundle formation. CONCLUSION: Tannin inhibits HIV-1 entry into target cells by interfering with the gp41 six-helix bundle formation, thus blocking HIV-1 fusion with the target cell.