title: Association of theXPAA23G polymorphism with the risk of head and neck carcinomas: Evidence from 5,491 subjects.
abstract: TheXPAgene participates in modulating DNA damage recognition during the DNA nucleotide excision repair process. Current data regarding the association of theXPAA23G polymorphism with the risk of head and neck squamous cell carcinoma (HNSCC) remain controversial, and meta-analyses focusing on the HNSCC risk and this polymorphism are limited. Therefore, the aim of the present study was to derive a more precise estimation of this association by a meta-analysis of all the eligible studies. Odds ratios (ORs) with 95% confidence intervals (CI) were assessed for the strength of the associations in eight studies, including 5,491 subjects (2,409 HNSCC cases and 3,082 controls). The overall analysis revealed that theXPAA23G polymorphism was not significantly associated with the overall HNSCC risk. Consistently, there was no evidence for the association between theXPAA23G polymorphism and HNSCC risk in subgroup analyses based on ethnicity and the source of controls. However, the significant associations in oral carcinoma with the increased risk among theXPAheterozygote (AG vs. AA: OR, 1.58; 95% CI, 1.06-2.37; Pheterogeneity=0.23, I2=30%) and dominant (AG +GG vs. AA: OR, 1.53; 95% CI, 1.04-2.23; Pheterogeneity=0.21, I2=36%) models were observed in the subgroup analysis by tumor site. In conclusion, the meta-analysis suggested that theXPAA23G polymorphism was not associated with overall HNSCC susceptibility, but it was associated with oral carcinoma susceptibility and it may be a risk factor for oral carcinoma. Further well-designed and large studies are required to confirm these associations.
authors.affiliation: Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, P.R. China.
authors.forename: Lan
authors.initials: L
authors.lastname: Wu
authors.affiliation: Department of Oral and Maxillofacial Surgery, XiangYa Hospital, Central South University, Changsha, Hunan 410011, P.R. China.
authors.forename: Xing
authors.initials: X
authors.lastname: Gao
authors.affiliation: Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, P.R. China.
authors.forename: Dongxia
authors.initials: D
authors.lastname: Ye
authors.affiliation: Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, P.R. China.
authors.forename: Yewei
authors.initials: Y
authors.lastname: Ding
authors.affiliation: Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, P.R. China.
authors.forename: X I
authors.initials: XI
authors.lastname: Yang
authors.affiliation: Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, P.R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
keywords: XPA A23G; head and neck; meta-analysis; oral cancer; polymorphism