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Meta-analysis on the association between xeroderma pigmentosum Group A A23G polymorphism and esophageal cancer in a Chinese population


1 Department of Radiation Oncology, Qilu Hospital of Shandong University, Jinan 250012; Department of Radiation Oncology, Baotou Tumor Hospital, Baotou 014030, China
2 Department of Radiation Oncology, Baotou Tumor Hospital, Baotou 014030, China
3 Department of Radiation Oncology, Qilu Hospital of Shandong University, Jinan 250012, China

Correspondence Address:
Yu-Feng Cheng,
Department of Radiation Oncology, Qilu Hospital of Shandong University, No. 107, Wenhua West Road, Jinan 250012
China
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Source of Support: None, Conflict of Interest: None

Aim of the Study: Several studies have evaluated the correlation between xeroderma pigmentosum Group A (XPA) A23G polymorphism (rs 1800975) and esophageal cancer in Chinese people. However, the results are inconsistent. To assess the effects of XPA A23G variants on the risk for development of esophageal cancer in the Chinese population, a meta-analysis was performed. Materials and Methods: Studies were identified using PubMed and Chinese databases through December 2015. The associations were assessed with pooled odds ratios (ORs) and 95% confidence intervals (95% CIs). Results: This meta-analysis identified seven studies including 1514 esophageal cancer cases and 2120 controls. In the overall analysis, no significant association between XPA A23G polymorphism and esophageal cancer was found in the Chinese population. In the subgroup analyses by geographic area(s) and source of controls, significant results were only found in studies with hospital-based controls (GG vs. AA: OR = 0.42, 95% CI = 0.28–0.62; GG vs. AA + AG: OR = 0.55, 95% CI = 0.39–0.78; GG + AG vs. AA: OR = 0.54, 95% CI = 0.40–0.72; G vs. A: OR = 0.61, 95% CI = 0.50–0.75). Conclusion: This meta-analysis suggested that XPA A23G gene polymorphism may be one low-penetrant risk factor for esophageal cancer in Chinese individuals.


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