Abstract: The analysis of CS and PR mutations in therapy-experienced viruses revealed several positive correlations--A431V with L24I-M46I/L-I54V-V82A; I437V with I54V-V82F/T/S; L449V with I54M/L/S/T/A; and L449F/R452S/P453L: with D30N-I84V--whereas P453L and V82A were negatively correlated.
Fosamprenavir clinical study meta-analysis in ART-naive subjects: rare occurrence of virologic failure and selection of protease-associated mutations.
Abstract: RESULTS: FPV-associated resistance mutations were detected in 5/74 patients with VF, with 4/5 receiving unboosted FPV; in four patients viruses developed I54L or M and one developed the V32I+I47V combination.
Introduction: Nevertheless, the few reported data establish that i) the natural nucleotide polymorphism of the HIV-2 Protease includes amino acid substitutions that are associated with drug resistance in HIV-1, and ii) comparison between the Protease sequences of treated and untreated HIV-2 infected individuals reveals a number of mutations under some PI-selective pressure such as K7R, V20I/A, I36V, V46I, I54L/M, V62A/T, V71L, I82F, I84V/L, 90LM, and L99F.
Substitutions in the Reverse Transcriptase and Protease Genes of HIV-1 Subtype B in Untreated Individuals and Patients Treated With Antiretroviral Drugs.
PMID: 19825125
2005
Journal of the International AIDS Society
Table: I54L
Resistance profiles observed in virological failures after 24 weeks of amprenavir/ritonavir containing regimen in protease inhibitor experienced patients.
Abstract: Several genotypic resistance pathways in protease gene have been described to be associated to unboosted APV failure (I50V, V32I + I47V, I54L/M, or less commonly I84V, which may be accompanied by one ore more accessory mutations such as L10F, L33F, M46I/L).
HIV protease mutations associated with amprenavir resistance during salvage therapy: importance of I54M.
Abstract: Among mutations newly detected after amprenavir treatment, I54M occurred in six cases, I54L in two cases, M46I in two cases, I47V in one case and I50V in one case.
HIV-1 phenotypic susceptibility to lopinavir (LPV) and genotypic analysis in LPV/r-naive subjects with prior protease inhibitor experience.
PMID: 12869832
2003
Journal of acquired immune deficiency syndromes (1999)
Abstract: Current PI therapy (P = 0.002) and indinavir administration (P < 0.001), >5 LPV/r mutations (P < 0.0012), and detection of L10FIRV, K20MR, M46IL, I54VL, A71VT, G73SA, V82AFTS, I84V, and M90L were associated with LPV resistance in univariate analysis.
Abstract: Factors independently associated with LPV resistance were K20MR (odds ratio [OR], 13.9; 95% confidence interval [CI], 1.3-145.1; P = 0.028), I54VL (OR, 131.7; 95% CI, 10.5-1654.7; P < 0.001), G73SA (OR, 19.2; 95%
The M184V substitution in human immunodeficiency virus type 1 reverse transcriptase delays the development of resistance to amprenavir and efavirenz in subtype B and C clinical isolates.
PMID: 12821504
2003
Antimicrobial agents and chemotherapy
Abstract: Similarly, there was a marked delay in the emergence of mutations associated with APV resistance (I54 M/L/V) in subtype B viruses harboring M184V compared with paired WT viral isolates.
Emergence of resistance to protease inhibitor amprenavir in human immunodeficiency virus type 1-infected patients: selection of four alternative viral protease genotypes and influence of viral susceptibility to coadministered reverse transcriptase nucleoside inhibitors.
PMID: 11850255
2002
Antimicrobial agents and chemotherapy
Abstract: These mutations fell into four distinct categories, characterized by the presence of either I50V, I54L/I54M, I84V, or V32I+I47V and often included accessory mutations, commonly M46I/L.
[Pharmacological study and clinical effect of HIV protease inhibitor amprenavir].
Abstract: One of the major concerns associated with anti-HIV agents is the resistance mutation development, and the presence of I50V, M46I/L, I47V, I54L/V and I84V genotype has been observed in amprenavir therapy experienced subjects.
HIV mutation literature information.
PMID: 
2006
Antiviral therapy
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