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J Hepatol. 2007 Mar;46(3):381-6. Epub 2006 Nov 2.

Polymorphisms of interleukin-1beta in Japanese patients with hepatitis B virus infection.

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  • 1Clinical Research Center, National Nagasaki Medical Center, Kubara 2-1001-1, Omura 856-8562, Japan. migita@nmc.hosp.go.jp

Abstract

BACKGROUND/AIMS:

Hepatitis B virus (HBV) induces liver cirrhosis (LC) and hepatocellular carcinoma (HCC) mainly by causing chronic necro-inflammatory hepatic disease. Our aim was to investigate the relationships between the polymorphisms of the interleukin-1B (IL-1B) promoter region and the interleukin-1 receptor antagonist gene (IL-1RN) and disease progression in an HBV-infected Japanese population.

METHODS:

Genomic DNA was extracted from the peripheral blood of 237 HBV carriers. Polymorphisms in IL-1B and IL-1RN were analyzed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and PCR with confronting two-pair primers (PCR-CTPP) methods. These polymorphic sites include the promoter regions of IL-1B at positions -511 and -31, and IL-1RN variable tandem repeats.

RESULTS:

The IL-1B -31 and -511 loci were in complete linkage disequilibrium, and the frequency of the IL-1B -31 T carrier (IL-1B -31 T/T or T/C) was significantly higher in HBV carriers with LC compared to those without LC (LC; 86.1% vs non-LC; 72.1%, P=0.009). There was no difference in the genotype distribution of the IL-1RN polymorphism.

CONCLUSIONS:

This is the first report describing the association between IL-1B polymorphism and HBV-related hepatic fibrosis, and our data suggest that IL-1B polymorphisms may be related to disease progression of HBV-related hepatitis in Japan.

[PubMed - indexed for MEDLINE]
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