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Published in: Cancer Cell International 1/2014

Open Access 01-12-2014 | Primary research

Association between interleukin-4 gene intron 3 VNTR polymorphism and cancer risk

Authors: Yin Duan, Chi Pan, Jinan Shi, Hailong Chen, Suzhan Zhang

Published in: Cancer Cell International | Issue 1/2014

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Abstract

Background

Interleukin-4(IL-4) is a critical inflammatory cytokine and has been involved in pathogenesis of cancer. To date, several studies have investigated the association between IL-4 intron 3 variable number of tandem repeats (VNTR) polymorphism and cancer risk in humans; however, the results remain controversial. We performed this meta-analysis to find a more conclusive association between this polymorphism and cancer risk.

Methods

Eight eligible case–control studies were identified through searching electronic databases, including 1583 cases and 1638 controls. Odds ratio (OR) and corresponding 95% confidence interval (CI) were used to estimate the strength of the association.

Results

The results of overall analyses indicated that the variant RP2 allele was associated with a decreased cancer risk compared with the RP1 allele (RP2/RP2 vs. RP1/RP1, OR = 0.64, 95% CI = 0.44-0.94; RP2/RP2 vs. RP1/RP1 + RP1/RP2, OR = 0.75, 95% CI = 0.60-0.92; RP2 vs. RP1, OR = 0.72, 95% CI = 0.56-0.92). In subgroup analyses stratified by ethnicity, there was evidence in the Asian population for an association between this polymorphism and cancer risk (RP2/RP2 vs. RP1/RP1 + RP1/RP2, OR = 0.79, 95% CI = 0.63-0.99; RP2 vs. RP1, OR = 0.77, 95% CI = 0.61-0.97).

Conclusions

IL-4 intron 3 VNTR polymorphism could influence the risk of human cancer. Due to the limitations of this meta-analysis, further well-designed and functional researches should be performed to validate our results.
Appendix
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Metadata
Title
Association between interleukin-4 gene intron 3 VNTR polymorphism and cancer risk
Authors
Yin Duan
Chi Pan
Jinan Shi
Hailong Chen
Suzhan Zhang
Publication date
01-12-2014
Publisher
BioMed Central
Published in
Cancer Cell International / Issue 1/2014
Electronic ISSN: 1475-2867
DOI
https://doi.org/10.1186/s12935-014-0131-7

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