Format

Send to

Choose Destination
PLoS One. 2016 Jan 27;11(1):e0147410. doi: 10.1371/journal.pone.0147410. eCollection 2016.

Association between TNFA Gene Polymorphisms and Helicobacter pylori Infection: A Meta-Analysis.

Author information

1
Department of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China.
2
Department of Gastroenterology, Second Hospital of Gansu Province, Lanzhou, China.

Abstract

BACKGROUND:

Several host genetic factors are thought to affect susceptibility to Helicobacter pylori infection-related diseases, including tumor necrosis factor (TNF)-α. Previous studies have evaluated the association between TNFA gene polymorphisms and H. pylori infection, but the results were inconclusive. We conducted this meta-analysis to clarify the association between TNFA polymorphisms and H. pylori infection.

METHODS:

Published literature within PubMed, Embase, and the Cochrane Library were used in our meta-analysis. Data were analyzed with the Stata13.1 software package using pooled odds ratios (ORs) with 95% confidence intervals (CI).

RESULTS:

A total of 24 studies were included in our study. The TNFA -308G>A polymorphism was associated with decreasing H. pylori infection (AA vs. AG+GG, OR = 0.64, 95% CI = 0.43-0.97; AA vs. GG, OR = 0.64, 95% CI = 0.43-0.97). A significantly decreased risk was also found for -1031T>C polymorphism (CC vs. CT+TT, OR = 0.61, 95% CI = 0.44-0.84). -863C>A polymorphism was associated with increasing risk of H. pylori infection (AA+AC vs. CC, OR = 1.47, 95% CI = 1.16-1.86; A allele vs. C allele, OR = 1.40, 95% CI = 1.14-1.72). There was no significant association between -857C>T polymorphism and H. pylori infection. When stratified analysis was conducted on H. pylori infection detection methods, -857C>T and -863C>A polymorphisms were associated with H. pylori infection for the non-ELISA subgroup. When stratified for ethnicity or study design, -863C>A significantly increased the risk and -1031T>C decreased the risk for the Asian subgroup and hospital-based subgroup.

CONCLUSION:

Results of our meta-analysis demonstrate that TNFA -308G>A and -1031 T>C polymorphisms may be protective factors against H. pylori infection, and -863C>A may be a risk factor, especially in Asian populations. Further studies with larger sample sizes are required to validate these results.

PMID:
26815578
PMCID:
PMC4729674
DOI:
10.1371/journal.pone.0147410
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Public Library of Science Icon for PubMed Central
Loading ...
Support Center