Review of Doravirine Resistance Patterns Identified in Participants During Clinical Development.
PMID: 32925358
2020
Journal of acquired immune deficiency syndromes (1999)
Table: K65R
Drug Resistance Mutations Against Protease, Reverse Transcriptase and Integrase Inhibitors in People Living With HIV-1 Receiving Boosted Protease Inhibitors in South Africa.
Result: The K65R/N mutation occurred in five (5%) patients; K65R occurred in two (2%) patients receiving AZT plus 3TC, and in one (1%) patient receiving TDF plus FTC.
Table: K65R/N
Discussion: In our study, M184V, L74V, K65R, and Y115F were the most common major NRTI RAMs in patients receiving LPV/r as their bPIs.
Discussion: The K65R and Y115F RAMs occurred more frequently in patients receiving AZT plus 3TC, rather than in patients receiving ABC plus 3TC.
Near point-of-care, point-mutation test to detect drug resistance in HIV-1: a validation study in a Mexican cohort.
Abstract: DESIGN: OLA-Simple probes to detect K65R, K103N/S, Y181C, M184V, and
Discussion: Despite modifications, these K65R probes had the highest rate of IND results (8.5%) mainly due to closely spaced nucleotide variations at codons 67, 68, and 69, including the polymorphic mutation S68G (Supplementary Table 3, http://links.lww.com/QAD/B693).
Discussion: To reduce the IND rate for K65R, a mixture of common probes complementary to these polymorphisms/mutations may be necessary at this site.
Discussion: Universal probes for K65R in the OLA-Simple kit were slightly modified for the subtype B Mexican variants, and these had not been previously validated on clinical specimens.
Prevalence and characteristics of HIV drug resistance among antiretroviral treatment (ART) experienced adolescents and young adults living with HIV in Ndola, Zambia.
Abstract: The mutation M184V which confers resistance to NRTI drugs of lamivudine (3TC) and emtricitabine (FTC) was the most common (81%) among NRTI associated mutations followed by K65R (34.5%) which is associated with both tenofovir disoproxil fumarate (TDF) and tenofovir alafenamide fumarate (TAF) resistance.
Result: Of these (n = 45), 19 had the K65R mutation that confers resistance to tenofovir and abacavir but potentiates the effectiveness of zidovudine as a second line option.
Result: Overall, the 10 most common mutations were M184V (81%), K103N (65.5%), Y188C (36.2%), Y181C (36.2%), V106A (36.2),
In Vivo Emergence of a Novel Protease Inhibitor Resistance Signature in HIV-1 Matrix.
Result: Baseline genotype (pre-PI) indicated that the individual had developed extensive resistance to first-line ART, with the nucleoside reverse transcriptase inhibitor (NRTI) mutations K65R and M184I conferring high-level tenofovir and lamivudine resistance, respectively, as well as K103N and Y181C conferring resistance to nonnucleoside reverse transcriptase inhibitors (NNRTI).
Result: Of note, we observed loss of mutations affecting susceptibility to lamivudine (M184I), tenofovir (K65R), and efavirenz (K103N
Table: K65R
Impact of archived M184V/I mutation on the effectiveness of switch to co-formulated elvitegravir, cobicistat, emtricitabine and tenofovir alafenamide among virally suppressed people living with HIV.
PMID: 32737511
2020
The Journal of antimicrobial chemotherapy
Abstract: RESULTS: Overall, 100 case patients with the M184V/I mutation were identified, including 6 (6.0%) with K65R and 13 (13.0%) with at least one TAM, and were matched to 400 controls in terms of gender, age (mean = 40.3 versus 39.7 years) and cumulative exposure duration to tenofovir disoproxil fumarate (median = 146 versus 143 weeks).
Abstract: The presence of the K65R mutation or TAMs was not associated with virological non-response.
Two Coselected Distal Mutations in HIV-1 Reverse Transcriptase (RT) Alter Susceptibility to Nonnucleoside RT Inhibitors and Nucleoside Analogs.
Discussion: Most NRTI resistance mutations interfere with the incorporation of the NRTITP, either directly (e.g., M184V/I, which causes steric hindrance involving the oxathiolane ring of 3TCTP or FTCTP) or indirectly (e.g., K65R altering the ability of the RT to bind tenofovir relative to dATP).
Incidence and types of HIV-1 drug resistance mutation among patients failing first-line antiretroviral therapy.
PMID: 30928089
2019
Journal of pharmacological sciences
Abstract: RESULTS: 103 cases were successfully amplified, and the main drug resistance mutations in the reverse transcriptase (RT) region were M184V (50.49%), K103N (28.16%), Y181C (25.24%), and K65R (27.18%), while no drug main resistance mutation was found in the protease (PR) region.
Diversity of HIV-1 genotypes and high prevalence of pretreatment drug resistance in newly diagnosed HIV-infected patients in Shanghai, China.