Genetic divergence of human immunodeficiency virus type 1 Ethiopian clade C reverse transcriptase (RT) and rapid development of resistance against nonnucleoside inhibitors of RT.
PMID: 12069959
2002
Antimicrobial agents and chemotherapy
Abstract: After selection with DLV, a polymorphism, A62A, initially observed in the Ethiopian isolate 4762, mutated to A62V; the latter is a secondary substitution associated with multidrug resistance against nucleoside RT inhibitors.
The molecular mechanism of multidrug resistance by the Q151M human immunodeficiency virus type 1 reverse transcriptase and its suppression using alpha-boranophosphate nucleotide analogues.
PMID: 12194983
2002
The Journal of biological chemistry
Abstract: The appearance of up to five substitutions (A62V, V75I, F77L, F116Y, and Q151M) in the viral reverse transcriptase promotes resistance to these drugs, and reduces efficiency of the antiretroviral chemotherapy.
Abstract: Using A62V/V75I/F77L/F116Y/Q151M RT, k(pol) increases up to 70- and 13-fold using alpha-boranophosphate-ddATP and alpha-boranophosphate AZTTP, respectively.
Abstract: Using pre-steady state kinetics, we show that Q151M and A62V/
A rapid phenotypic assay for detecting multiple nucleoside analogue reverse transcriptase inhibitor-resistant HIV-1 in plasma.
Abstract: Zidovudine and other nucleoside analogue reverse transcriptase inhibitors (NRTIs), like zalcitabine and didanosine used for treatment of individuals infected with HIV-1, can select for viruses with Q151M and other associated mutations (for example, A62V, S68G, V751, F77L, F116Y) in the reverse transcriptase (RT) enzyme.
Polymorphisms of cytotoxic T-lymphocyte (CTL) and T-helper epitopes within reverse transcriptase (RT) of HIV-1 subtype C from Ethiopia and Botswana following selection of antiretroviral drug resistance.
Abstract: Mutations within immunogenic regions of clade C RT were noted during drug selection of subtype C isolates with nevirapine (S98I, Y181C, V108I and K103N), delavirdine, (A62V, V75E, L100I, K103T, V108I, Y181C), efavirenz (K103E, V106M, V179D, Y188C/H, G190A), lamivudine (M184I, M184V), and zidovudine (K70R), respectively.
4'-Ethynyl nucleoside analogs: potent inhibitors of multidrug-resistant human immunodeficiency virus variants in vitro.
PMID: 11302824
2001
Antimicrobial agents and chemotherapy
Abstract: These 4'-E analogs also suppressed replication of various drug-resistant HIV-1 clones, including HIV-1(M41L/T215Y), HIV-1(K65R), HIV-1(L74V), HIV-1(M41L/T69S-S-G/T215Y), and HIV-1(A62V/V75I/F77L/F116Y/Q151M).
Novel deletion of HIV type 1 reverse transcriptase residue 69 conferring selective high-level resistance to nevirapine.
PMID: 11559430
2001
AIDS research and human retroviruses
Abstract: In a subsequent sample 3 months later additional RT mutations were found, including A62V, Y188L, and Q151M, conferring high-level cross-resistance to multiple nucleoside analogs.
Prevalence of multiple dideoxynucleoside analogue resistance (MddNR) in a cohort of Italian HIV-1 seropositive patients extensively treated with antiretroviral drugs.
PMID: 11738338
2001
International journal of antimicrobial agents
Abstract: Results showed the presence of one or more mutations (A62V, V75I, F77L, F116Y and Q151M) able to confer resistance to all NRTIs in a relatively high percentage (7.9%) of patients enrolled in the study.
Phenotypic and genotypic resistance patterns of HIV-1 isolates derived from individuals treated with didanosine and stavudine.
Abstract: Other mutations observed included the A62V, V751, F77L, F116Y, Q151 M multinucleoside resistance complex (one), the Q151M mutation (two) and the rare V75T mutation (two).
Multidrug resistance genotypes (insertions in the beta3-beta4 finger subdomain and MDR mutations) of HIV-1 reverse transcriptase from extensively treated patients: incidence and association with other resistance mutations.
Abstract: Especially high levels of resistance to zidovudine were observed for viruses with a beta3-beta4 insertion in the background of A62V, L210W, and T215Y.
Abstract: In addition, we identified 13 (2.1%) viruses harboring specific MDR mutations (mainly Q151M and/or A62V, V75I, F116Y).
Abstract: Interestingly, the A62V mutation was found in 6 of the 15 strains with an insertion, whereas the other MDR mutations were not observed in insertion mutant strains.
Abstract: These include a cluster of five mutations in the reverse-transcriptase (RT) coding region (A62V, V7
Comparative fitness of multi-dideoxynucleoside-resistant human immunodeficiency virus type 1 (HIV-1) in an In vitro competitive HIV-1 replication assay.
Abstract: We examined whether human immunodeficiency virus type 1 (HIV-1) fitness was altered upon the acquisition of a set or subset of five mutations (A62V, V75I, F77L, F116Y, and Q151M) in the pol gene, which confers resistance to multiple dideoxynucleosides (MDR), as well as the zidovudine resistance-associated mutation T215Y, using a competitive HIV-1 replication assay in a setting of an HXB2D genetic background.
HIV mutation literature information.
PMID: 
2002
Antimicrobial agents and chemotherapy
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