Result: Some sequences contained recently described mutations that may reduce the susceptibility to etravirine; E28K (0.84%), V90I (0.42%) and E138Q (0.42%).
Effect of mutations at position E138 in HIV-1 reverse transcriptase on phenotypic susceptibility and virologic response to etravirine.
PMID: 21637112
2011
Journal of acquired immune deficiency syndromes (1999)
Abstract: Site-directed mutants harboring E138A/G/K/Q/R or S showed etravirine fold change values of 2.9, 2.4, 2.6, 3.0, 3.6, and 2.8, respectively.
Abstract: Virologic response (less than 50 copies/mL) was observed in six of 12 and eight of 10 patients with E138A and E138Q, respectively.
Constrained patterns of covariation and clustering of HIV-1 non-nucleoside reverse transcriptase inhibitor resistance mutations.
PMID: 20462946
2010
The Journal of antimicrobial chemotherapy
Abstract: NNRTI RAMs emerging in HIV-1 under selective pressure from TMC278 included combinations of V90I, L100I, K101E, V106A/I, V108I, E138G/K/Q/R, V179F/I, Y181C/I, V189I, G190E, H221Y, F227C, and M230I/L.
Additional HIV-1 mutation patterns associated with reduced phenotypic susceptibility to etravirine in clinical samples.
Abstract: Etravirine phenotypic fold changes were 380-1400 for K101P + E138A/G/Q + K103N/S/T + V179I and 12-130 for K101P + (K103S +/- V179I) in the absence of E138A/G/Q.
Compilation and prevalence of mutations associated with resistance to non-nucleoside reverse transcriptase inhibitors.