JOURNAL ARTICLE

IFNL4-ΔG genotype is associated with slower viral clearance in hepatitis C, genotype-1 patients treated with sofosbuvir and ribavirin

Eric G Meissner, Dimitra Bon, Ludmila Prokunina-Olsson, Wei Tang, Henry Masur, Thomas R O'Brien, Eva Herrmann, Shyamasundaran Kottilil, Anuoluwapo Osinusi
Journal of Infectious Diseases 2014 June 1, 209 (11): 1700-4
24367041
Response to pegylated interferon-alpha and ribavirin (IFN-α/RBV) treatment for chronic hepatitis C virus (HCV) infection is influenced by host genetic factors, but their role for IFN-α-free, direct-acting antiviral (DAA) regimens is unclear. An exonic deletion allele (IFNL4-ΔG) bolsters the established association with IFN-α/RBV therapy treatment outcome of another IFNL4 variant, rs12979860, which is located upstream of IFNL3 (IL28B). We report that in patients treated with the DAA sofosbuvir along with RBV, IFNL4-ΔG is associated with slower early viral decay, due to slower loss of free virus (P = .039) and decreased drug efficacy (P = .048), suggesting functional relevance of IFN-λ4 in IFN-α-free DAA therapies.

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