Affiliation:
1. Tibotec BVBA, Turnhoutseweg 30, 2340 Beerse, Belgium
2. Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts
3. Tibotec Inc., Titusville, New Jersey
Abstract
ABSTRACT
TMC310911 is a novel human immunodeficiency virus type 1 (HIV-1) protease inhibitor (PI) structurally closely related to darunavir (DRV) but with improved virological characteristics. TMC310911 has potent activity against wild-type (WT) HIV-1 (median 50% effective concentration [EC
50
], 14 nM) and a wide spectrum of recombinant HIV-1 clinical isolates, including multiple-PI-resistant strains with decreased susceptibility to currently approved PIs (fold change [FC] in EC
50
, >10). For a panel of 2,011 recombinant clinical isolates with decreased susceptibility to at least one of the currently approved PIs, the FC in TMC310911 EC
50
was ≤4 for 82% of isolates and ≤10 for 96% of isolates. The FC in TMC310911 EC
50
was ≤4 and ≤10 for 72% and 94% of isolates with decreased susceptibility to DRV, respectively.
In vitro
resistance selection (IVRS) experiments with WT virus and TMC310911 selected for mutations R41G or R41E, but selection of resistant virus required a longer time than IVRS performed with WT virus and DRV. IVRS performed with r13025, a multiple-PI-resistant recombinant clinical isolate, and TMC310911 selected for mutations L10F, I47V, and L90M (FC in TMC310911 EC
50
= 16). IVRS performed with r13025 in the presence of DRV required less time and resulted in more PI resistance-associated mutations (V32I, I50V, G73S, L76V, and V82I; FC in DRV EC
50
= 258). The activity against a comprehensive panel of PI-resistant mutants and the limited
in vitro
selection of resistant viruses under drug pressure suggest that TMC310911 represents a potential drug candidate for the management of HIV-1 infection for a broad range of patients, including those with multiple PI resistance.
Publisher
American Society for Microbiology
Subject
Infectious Diseases,Pharmacology (medical),Pharmacology
Cited by
29 articles.
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