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Published in: BMC Medical Genetics 1/2014

Open Access 01-12-2014 | Research article

Associations between interleukin-1 gene polymorphisms and sepsis risk: a meta-analysis

Authors: An-qiang Zhang, Wei Pan, Jun-wei Gao, Cai-li Yue, Ling Zeng, Wei Gu, Jian-xin Jiang

Published in: BMC Medical Genetics | Issue 1/2014

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Abstract

Background

Previous epidemiological studies have presented conflicting evidence regarding associations between interleukin-1 (IL-1) polymorphisms and sepsis susceptibility. We have performed a meta-analysis to evaluate possible associations between IL-1 polymorphisms and sepsis risk.

Methods

Eligible literature was retrieved from PubMed, Embase and Web of Knowledge databases until Jun 15, 2013. The pooled odds ratio (OR) and 95% confidence interval (CI) were calculated using random-effects model in the overall and subgroup analysis based on ethnicity, sepsis severity and quality score.

Results

Eighteen studies addressing five IL-1 polymorphisms were included in this meta-analysis. For IL-1A-889 (rs1800587) polymorphism, significant association was observed in overall comparison for allelic effect (OR = 1.47, 95% CI = 1.01-2.13, P = 0.04). There were no significant associations between either IL-1B-511 (rs16944) or IL-1B-31 (rs1143627) and sepsis susceptibility in overall or subgroup analyses. For IL-1B + 3594 (rs143634) polymorphism, genotype TT decreased sepsis risk in overall analysis (OR = 0.59, 95% CI = 0.36-0.97, P = 0.04), as well as in Caucasian (OR = 0.57, 95% CI = 0.34-0.95, P = 0.03) and sepsis (OR = 0.55, 95% CI = 0.31-0.97, P = 0.04) subgroup analysis. For IL-1RN VNTR polymorphism, significant association was observed in overall comparison for allelic effect (OR = 1.40, 95% CI = 1.01-1.95, P = 0.04). Furthermore, the effect sizes of IL-1RN VNTR on sepsis risk increased with disease severity (septic shock OR > severe sepsis OR > sepsis OR).

Conclusions

Our meta-analysis indicated that IL-1A-889, IL-1B + 3954 and IL-1RN VNTR might be associated with sepsis susceptibility. However, further studies with larger sample sizes and from homogenous populations would be necessary to validate these findings.
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Metadata
Title
Associations between interleukin-1 gene polymorphisms and sepsis risk: a meta-analysis
Authors
An-qiang Zhang
Wei Pan
Jun-wei Gao
Cai-li Yue
Ling Zeng
Wei Gu
Jian-xin Jiang
Publication date
01-12-2014
Publisher
BioMed Central
Published in
BMC Medical Genetics / Issue 1/2014
Electronic ISSN: 1471-2350
DOI
https://doi.org/10.1186/1471-2350-15-8

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