Resistance associated substitutions and genotypes/subtypes in direct-acting antivirals (DAAs) agents non-responding hepatitis C virus (HCV) infected patients

DAAAmino acid substitutions detected in DAA failing patientsHCV genotype/subtype associated with SVR failure
SOF159F1a, 1b, 2a/b/c, 3a
237G1a, 3a, 4a/d
282R/G/T1a, 1b, 2a/b/c, 3a, 4a/d
316F/H/N1a, 1b
320F1a
321A/I1a, 1b, 3a, 4a/d
VEL24R1a
28T/V1a
30E/K/H/V/K/L/R1a, 3a
31M/V/P1a, 1b, 2a/b/c, 3a, 4a/d
32L1a
58D1a
92K3a
93H/N/R/S/T/W1a, 1b, 2a/b/c, 3a, 4a/d
VOX36L1a
43S1b
80K/R1a, 4a/d
156T/V1a,1b

SOF: sofosbuvir, NS5B-polymerase inhibitor; VEL: velpatasvir, 2nd generation of NS5A inhibitor; VOX: voxilaprevir, 2nd generation of protease inhibitor; SVR: sustained virological response