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  • Title: Interleukin-28B single nucleotide polymorphism of donors and recipients can predict viral response to pegylated interferon/ribavirin therapy in patients with recurrent hepatitis C after living donor liver transplantation.
    Author: Kawaoka T, Takahashi S, Takaki S, Hiramatsu A, Waki K, Hiraga N, Miki D, Tsuge M, Imamura M, Kawakami Y, Aikata H, Ochi H, Onoe T, Tashiro H, Ohdan H, Chayama K.
    Journal: J Gastroenterol Hepatol; 2012 Sep; 27(9):1467-72. PubMed ID: 22432893.
    Abstract:
    BACKGROUND AND AIM: Interleukin-28B (IL28B) single nucleotide polymorphism (SNP) influences viral response (VR) to interferon (IFN) therapy in patients with hepatitis C. We studied the relationship between VR and the IL28B polymorphism (rs8099917) in patients on long-term pegylated IFN plus ribavirin (PEGIFN/RBV) therapy for recurrent hepatitis C after living-donor liver transplantation (LDLT). METHODS: Thirty-five patients with recurrent hepatitis C after LDLT were treated with PEGIFN/RBV. We evaluated the effect of IL28B SNP on the outcome in 20 patients infected with hepatitis C virus genotype 1 who completed IFN therapy. RESULTS: The sustained VR (SVR) rate was 54% (19/35) for all patients; 46% (13/28) for genotype 1. The SVR rate of donors' TT group (major genotype) was higher than that of donors' TG+GG group (minor genotype) (73% vs 20%), while that of recipients' TT group was similar to that of recipients' TG+GG group (64% vs 50%). With regard to the combined effect of donors' and recipients' IL28B SNP, the SVR rates of TT:TT (donors':recipients'), TT:TG+GG, TG+GG:any group were 81%, 50%, and 20%, respectively. The VR rate of TT:TT, TT:TG+GG and TG+GG:any group at 12 weeks were 28%, 0%, and 0%; those at 48weeks were 70%, 50%, 20%, and those at the end of treatment were 100%, 50%, 20%, respectively. The multivariate analysis identified IL28B of donors:recipients (TT:TT) as the only independent determinant of SVR (odds ratio 15.0, P=0.035). CONCLUSION: Measurement of donors' and recipients' IL28B SNP can predict the response to PEGIFN/RBV therapy, and the donors' IL28B SNP might be a more significant predictor than that of the recipients.
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