VDR gene polymorphisms impact on anemia at 2 weeks of anti-HCV therapy: a possible mechanism for early RBV-induced anemia.

The treatment of patients with HCV genotype 1 is quickly changing. The clinician could optimize the selection of patients who may benefit from standard therapy with pegylated-interferon and ribavirin instead of more expensive new combinations with the directly acting antivirals. We retrospectively examined in our cohort of 232 patients with genotype 1 infection the role of interleukin 28B (both rs8099917 and rs12979860), fibrosis stage and rapid virological response. Global SVR in TT/CC patients was 88.3% (98% in F0-F1, 80% in F2-F3); in TT/TC was 68.2 (85% in F0-F1, 71.4% in F2-F3). Rapid virological response was related to rs12979860 CC genotype but is not useful to predict the virological response in TG/GG patients at rs8099917. The standard dual therapy may be successfully administered in all TT/CC and TT/TC patients without F4 fibrosis score. Conversely, patients with TG/CC or GG/CC genotypes should be treated with other therapeutic options.