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  • Title: IL28B genetic variations are associated with treatment response of patients with chronic hepatitis C in a Chinese Han population.
    Author: Dong ZX, Zhou HJ, Xiang XG, Guo SM, Zhuang Y, Zhao GD, Xie Q.
    Journal: J Dig Dis; 2015 Feb; 16(2):90-7. PubMed ID: 25312023.
    Abstract:
    OBJECTIVES: This study aimed to investigate the association between interleukin 28B (IL28B) single nucleotide polymorphisms (SNPs) and sustained virological response (SVR) in Chinese Han patients with chronic hepatitis C (CHC) and to analyze the correlations between IL28B SNPs and their personal, virological and clinical characteristics. METHODS: Altogether 631 Chinese Han individuals, including 297 CHC patients treated with pegylated interferon α plus ribavirin, 14 spontaneous responders to hepatitis C virus (HCV) and 320 healthy controls were enrolled in the study. Two main SNPs of IL28B, rs12979860 and rs8099917, were genotyped using an SNaPshot Multiplex Assay. Associations between IL28B, treatment outcomes and the patients' characteristics were assessed by multivariate logistic regression. RESULTS: The proportion of individuals with the rs12979860 CC or rs8099917 TT genotype was similar in the healthy controls and the CHC patients, although all spontaneous responders presented with both genotypes. Patients with IL28B genotypes had a significantly high rate of rapid virological response (RVR) and SVR. Multivariate analysis revealed that the IL28B SNP rs12979860 CC genotype, being aged <40 years and having a non-genotype 1 (G1) were independent predictors for SVR. The rs12979860 CC genotype and rs8099917 TT genotypes were predictors for RVR. The rs12979860 CC and rs8099917 TT genotypes were more prevalent in patients with a non-G1 genotype than those with G1 genotype. CONCLUSIONS: IL28B rs12979860 CC genotype is a significant predictor for SVR and RVR in Chinese Han patients with CHC. Non-G1 HCV genotype is associated with favourable IL28B genotypes.
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