PKF050-638 inhibits the CRM1-mediated Rev nuclear export by disrupting CRM1-NES interaction. PKF050-638 is an effective and selective inhibitor of HIV-1 Rev (IC50=0.04 μM).
5,7,3',5'-tetrahydroxy-6,4'-dimethoxyflavone exhibits anti-HIV-1 activity in the anti-syncytium assay using (∆Tat rev)MC99 virus and 1A2 cell line system, it shows considerably activity against HIV-1 reverse transcriptase. It exhibits cytotoxic activity against P-388 cell lines, it can inhibit DNA topoisomerase IIα activity, which may be responsible for the observed cytotoxicity.