Journal
ANTIVIRAL RESEARCH
Volume 87, Issue 3, Pages 367-372Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.antiviral.2010.06.001
Keywords
HIV-1 subtypes; Drug resistance; Protease inhibition; PL-100
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Funding
- Canadian Institutes of Health Research (CIHR)
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PL-100 is a novel HIV-1 protease inhibitor (PI) that maintains activity against viruses that are resistant to other Pis. To further characterize this compound, we used it to select for drug resistance in tissue culture. using two non-B HIV-1 subtypes, viz. subtype C and a CRF01_AE recombinant virus. PL-100 selected for both minor and major PI resistance mutations along either of two distinct pathways. One of these involved the V82A and L90M resistance mutations while the other involved a mutation at position T80I, with other mutations being observed at positions M46I/L, I54M, K55R, L76F, P81S and I85V. The resistance patterns in both subtype C and CRF01_AE were similar and an accumulation of at least three mutations in the flap and active sites were required in each case for high-level resistance to occur, demonstrating that PL-100 has a high genetic barrier against the development of drug resistance. (C) 2010 Elsevier B.V. All rights reserved.
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