Comprehensive pathway-based association study of DNA repair gene variants and the risk of nasopharyngeal carcinoma

Hai De Qin, Yin Yao Shugart, Jin Xin Bei, Qing Hua Pan, Lina Chen, Qi Sheng Feng, Li Zhen Chen, Wei Huang, Jian Jun Liu, Timothy J. Jorgensen, Yi Xin Zeng, Wei Hua Jia

Research output: Contribution to journalArticlepeer-review

Abstract

DNA repair plays a central role in protecting against environmental carcinogenesis, and genetic variants of DNA repair genes have been reported to be associated with several human malignancies. To assess whether DNA gene variants were associated with nasopharyngeal carcinoma (NPC) risk, a candidate gene association study was conducted among the Cantonese population within the Guangdong Province, China, the ethnic group with the highest risk for NPC. A 2-stage study design was utilized. In the discovery stage, 676 tagging SNPs covering 88 DNA repair genes were genotyped in a matched case-control study (cases/controls = 755/ 755). Eleven SNPs with Ptrend < 0.01 were identified. Seven of these SNPs were located within 3 genes, RAD51L1, BRCA2, and TP53BP1. In the validation stage, these 11 SNPs were genotyped in a separate Cantonese population (cases/controls = 1,568/1,297). Two of the SNPs (rs927220 and rs11158728), both in RAD51L1, remained strongly associated with NPC. The SNP rs927220 had a significant Pcombined of 5.55 × 10-5, with OR = 1.20 (95% CI = 1.10-1.30), Bonferroni corrected P = 0.0381. The other SNP (rs11158728), which is in strong linkage disequilibrium with rs927220 (r 2= 0.7), had a significant Pcombined of 2.0 × 10-4, Bonferroni corrected P = 0.1372. Gene-environment interaction analysis suggested that the exposures of salted fish consumption and cigarette smoking had potential interactions with DNA repair gene variations, but need to be further investigated. Our findings support the notion that DNA repair genes, in particular RAD51L1, play a role in NPC etiology and development.

Original languageEnglish (US)
Pages (from-to)3000-3008
Number of pages9
JournalCancer Research
Volume71
Issue number8
DOIs
StatePublished - Apr 15 2011

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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