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Published in: BMC Cancer 1/2019

Open Access 01-12-2019 | Helicobacter Pylori | Research article

Blood groups A and AB are associated with increased gastric cancer risk: evidence from a large genetic study and systematic review

Authors: Yingying Mao, Wenjun Yang, Qi Qi, Fei Yu, Tianpei Wang, Hongfei Zhang, Juncheng Dai, Hongxia Ma, Zhibin Hu, Hongbing Shen, Gang Li, Guangfu Jin

Published in: BMC Cancer | Issue 1/2019

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Abstract

Background

The association of ABO blood groups with gastric cancer risk was proposed decades ago, but the results have been inconsistent.

Methods

We used two single nucleotide polymorphisms to determine ABO genotype in 4932 gastric cancer cases and 6158 controls of Chinese descent, and evaluated the associations of ABO blood groups and genotypes with risk of gastric cancer using multivariable logistic regression models. We also systematically reviewed published literature and performed a meta-analysis of all relevant studies.

Results

In the case-control study, compared with blood group O, both blood group A and AB were associated with increased gastric cancer risk (for group A, odds ratio (OR) = 1.13, 95% confidence interval (CI): 1.02–1.24; for group AB, OR = 1.18, 95% CI: 1.02–1.36, respectively). Analyses of ABO genotypes revealed associations of AO and AB with risk of gastric cancer compared with OO genotype. Consistent with the case-control study, meta-analysis of 40 studies including 33,613 cases and 2,431,327 controls demonstrated that blood group A (OR = 1.19, 95% CI: 1.13–1.25) and AB (OR = 1.09, 95% CI: 1.03–1.16) were associated with increased risk of gastric cancer.

Conclusions

Our analyses validated the association of blood group A with risk of gastric cancer, and suggested that blood group AB was also associated with gastric cancer risk. Functional investigations are warranted to elucidate the exact mechanism of ABO blood groups in gastric carcinogenesis.
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Metadata
Title
Blood groups A and AB are associated with increased gastric cancer risk: evidence from a large genetic study and systematic review
Authors
Yingying Mao
Wenjun Yang
Qi Qi
Fei Yu
Tianpei Wang
Hongfei Zhang
Juncheng Dai
Hongxia Ma
Zhibin Hu
Hongbing Shen
Gang Li
Guangfu Jin
Publication date
01-12-2019
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2019
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-019-5355-4

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