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Insulin resistance undermines the advantages of IL28B polymorphism in the pegylated interferon alpha-2b and ribavirin treatment of chronic hepatitis C patients with genotype 1.

Abstract：

BACKGROUND & AIMS:Recent studies have suggested that insulin resistance exerts a strong influence on chronic hepatitis C virus (HCV) infection. We analyzed pretreatment factors useful for predicting sustained virological response (SVR), especially interleukin (IL) 28B polymorphism and Homeostasis Model Assessment of Insulin Resistance (HOMA-IR). METHODS:This cohort study consisted of 328 chronic hepatitis C patients with HCV genotype 1 who were treated for 48 weeks with pegylated interferon (PegIFN) α-2b and ribavirin (RBV). Genotyping of the polymorphisms in the IL28B gene region (rs8099917) on chromosome 19 was performed on DNA collected from each patient. RESULTS:No significant difference in IL28B genotype distribution was found according to HOMA-IR. Multivariate analysis identified the IL28B TT genotype (OR=5.97, 95% CI 2.15-16.55, p=0.0006) and the baseline HOMA-IR (OR=0.65, 95% CI 0.48-0.87, p=0.0044) as significant, independent pretreatment predictors of SVR. Receiver operating characteristic analyses to determine the optimal threshold values of HOMA-IR for predicting SVR showed that the areas under the curve (AUC) were high for both IL28B TT (AUC=0.774, HOMA-IR cut-off value: 2.45) and IL28B TG/GG genotypes (AUC=0.772, HOMA-IR cut-off value: 1.55). CONCLUSIONS:For HCV genotype 1, both IL28B and baseline HOMA-IR are independent pretreatment predictors of SVR in patients treated with PegIFNα-2b and RBV. Insulin resistance undermines the advantages of IL28B polymorphism to obtain SVR.

journal_name

J Hepatol

journal_title

Journal of hepatology

authors

Ogawa E,Furusyo N,Murata M,Ikezaki H,Ihara T,Hayashi T,Toyoda K,Taniai H,Okada K,Kainuma M,Hayashi J

doi

10.1016/j.jhep.2012.04.027

subject

Has Abstract

pub_date

2012-09-01 00:00:00

pages

534-40

issue

3

eissn

0168-8278

issn

1600-0641

pii

S0168-8278(12)00349-2

journal_volume

57

pub_type

杂志文章

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