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Interleukin 10 promoter region polymorphisms and susceptibility to advanced alcoholic liver disease

Lookup NU author(s): Professor Ann Daly, Professor Margaret Bassendine, Professor Chris Day

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Abstract

Background - The factors determining why less than 10% of heavy drinkers develop advanced alcoholic liver disease (ALD) remain elusive, although genetic factors may be important. Interleukin 10 (IL-10) is an important cytokine with anti-inflammatory, anti-immune, and anti-fibrotic functions. Several polymorphisms have been identified in the IL-10 promoter and recent evidence suggests that some of these may have functional effects on IL-10 secretion. Aims - To test the hypothesis that IL-10 promoter region polymorphisms are associated with susceptibility to ALD. Methods - The allele frequencies for the two single base pair substitutions at positions -627 (C→A) and -1117 (A→G) in the IL-10 promoter were determined in 287 heavy drinkers with biopsy proved advanced ALD, 107 heavy drinkers with no evidence of liver disease or steatosis only on biopsy, and 227 local healthy volunteers. Results - At position -627, 50% of patients with advanced ALD had a least one A allele compared with 33% of controls (p<0.0001) and 34% of drinkers with no or mild disease (p=0.017). At position -1117, the slight excess of the A allele in drinkers with advanced disease was because of linkage disequilibrium between the A alleles at the two sites. Conclusions - Among heavy drinkers, possession of the A allele at position -627 in the IL- 10 promoter is associated with an increased risk of advanced liver disease. This is consistent with recent functional data that the -627°A allele is associated with low IL-10 expression which will favour inflammatory, immune mediated, and profibrotic mechanisms of alcohol related liver injury.


Publication metadata

Author(s): Daly AK; Day CP; Bassendine MF; Grove J; Gilvarry E

Publication type: Article

Publication status: Published

Journal: Gut

Year: 2000

Volume: 46

Issue: 4

Pages: 540-545

Print publication date: 01/01/2000

ISSN (print): 0017-5749

ISSN (electronic): 1468-3288

Publisher: BMJ Publishing Group Ltd

URL: http://dx.doi.org/10.1136/gut.46.4.540

DOI: 10.1136/gut.46.4.540

PubMed id: 10716685


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