Tipranavir (PNU-140690) inhibits the enzymatic activity of HIV-1 protease, blocks the dimerization of protease subunits, and exerts potent activity against a wide spectrum of wild-type and multi-PI-resistant HIV-1 variants. When a mixture of 11 multi-PI-resistant (but TPV-sensitive) clinical isolates (HIV11MIX), which include HIVB and HIVC, is selected against Tipranavir, HIV11MIX rapidly (by 10 passages [HIV11MIX]) acquires high-level Tipranavir (PNU-140690) resistance and replicates at high concentrations of Tipranavir (PNU-140690). cHIVB and cHIVB are significantly resistant to Tipranavir (PNU-140690), with IC50s of 2.9 and 3.2 μM, respectively, which are 11- and 12-fold increases in comparison to the IC50 against cHIVB, respectively.
Medlife has not independently confirmed the accuracy of these methods. They are for reference only.