Abstract
The stage-specific antimalarial activities of a panel of antiretroviral protease inhibitors (PIs), including two nonpeptidic PIs (tipranavir and darunavir), were tested in vitro against Plasmodium falciparum. While darunavir demonstrated limited antimalarial activity (effective concentration [EC(50)], >50 microM), tipranavir was active at clinically relevant concentrations (EC(50), 12 to 21 microM). Saquinavir, lopinavir, and tipranavir preferentially inhibited the growth of mature asexual-stage parasites (24 h postinvasion). While all of the PIs tested inhibited gametocytogenesis, tipranavir was the only one to exhibit gametocytocidal activity.
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