Result: In the VIKING-3 trial, dolutegravir response rates (<50 HIV-1 RNA copies/ml at week 24) declined from 79% (n = 100/126) for patients without Q148 mutations at baseline (including those with
N155H,
Y143C/H/R,
T66A,
E92Q, or historical evidence of
INSTI resistance), to 58% (21/36) for patients with Q148 plus one additional secondary mutation, to 24% (5/21) for those with Q148 plus two or more secondary mutations.