Method: Participants with a history of genotypic/phenotypic drug resistance to protease inhibitors (PIs) or with HIV-1 genotypic drug resistance to PIs at baseline (including D30N, M46I/L, I47V/A, G48V, I50L, I54M/L, Q58E, T74P, L76V, V82A/F/L/T/S, N83D, I84V, N88S, or L90M) were excluded, despite any reported effects of PI resistance or resistance
Molecular Determinants of Epistasis in HIV-1 Protease: Elucidating the Interdependence of L89V and L90M Mutations in Resistance.
Introduction: One such example is the A71V mutation, a secondary mutation that, when observed in conjunction with I50V/L, acts to restore a balance between catalytic efficiency and inhibitor binding.
Switching to bictegravir/emtricitabine/tenofovir alafenamide maintained HIV-1 RNA suppression in participants with archived antiretroviral resistance including M184V/I.
PMID: 31430369
2019
The Journal of antimicrobial chemotherapy
Method: Primary PI-R substitutions were D30N, V32I, M46I/L, I47V/A, G48V, I50V/L, I54M/L, Q58E, T74P, L76V, V82A/F/L/S/T, N83D, I84V, N88S and L90M in PR.
High Levels of HIV-1 Drug Resistance in Children Who Acquired HIV Infection Through Mother to Child Transmission in the Era of Option B+, Haiti, 2013 to 2014.
PMID: 30640198
2019
The Pediatric infectious disease journal
Result: One child had a major M46I PI mutation, which causes low level of resistance to all PIs except darunavir and tipranavir, and another had the I50L major PI mutation, which causes high level resistance to atazanavir (Table 1).
Trends in the Molecular Epidemiology and Genetic Mechanisms of Transmitted Human Immunodeficiency Virus Type 1 Drug Resistance in a Large US Clinic Population.
Introduction: It appears therefore that only a single PI monotherapy patient (described below, patient A) experienced a loss of drug options due to a mutation (I50L) selected by study drug.
Result: Notably, I50L was not detected as a minority variant at this time point despite its detection (as a mixture) by Sanger sequencing at week 48, and it was also absent by Sanger sequencing at week 71.
Result: Patient A, who received atazanavir as PI monotherapy, met the primary outcome due to an I50L mutation (patient 5 in Table 2 in main trial report).
Table: I50I/L
Table: I50L
A decade of viral mutations and associated drug resistance in a population of HIV-1+ Puerto Ricans: 2002-2011.
Result: The 3 most prevalent HIV-1 resistance-associated mutations for PRO were L63P (73.9%), V77I (45.2%) and I13V (34.2%), whereas I50L, I50V and K20I were the least abundant mutations recorded during the 10-year period (Figs 2 and 4).
Comparison between next-generation and Sanger-based sequencing for the detection of transmitted drug-resistance mutations among recently infected HIV-1 patients in Israel, 2000-2014.
PMID: 28799325
2017
Journal of the International AIDS Society
Table: I50L
Week 48 resistance analysis of Elvitegravir/Cobicistat/Emtricitabine/Tenofovir DF versus Atazanavir + Ritonavir + Emtricitabine/Tenofovir DF in HIV-1 infected women (WAVES study GS-US-236-0128).