We conducted a genome-wide association study of gastric cancer and esophageal squamous cell carcinoma (ESCC) in ethnic Chinese subjects in which we genotyped 551,152 SNPs. We report a combined analysis of 2,240 gastric cancer cases, 2,115 ESCC cases and 3,302 controls drawn from five studies. In logistic regression models adjusted for age, sex and study, multiple variants at 10q23 had genome-wide significance for gastric cancer and ESCC independently. A notable signal was rs2274223, a nonsynonymous SNP located in PLCE1, for gastric cancer (P = 8.40 × 10−9; per-allele odds ratio (OR) = 1.31) and ESCC (P = 3.85 × 10−9; OR = 1.34). The association with gastric cancer differed by anatomic subsite. For tumors in the cardia the association was stronger (P = 4.19 × 10−15; OR = 1.57), and for those in the noncardia stomach it was absent (P = 0.44; OR = 1.05). Our findings at 10q23 could provide insight into the high incidence of both cancers in China.
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We thank the study participants and staff of the Shanghai Men's Health Study (SMHS), Shanghai Women's Health Study (SWHS) and Singapore Chinese Health Study (SCHS). Supported by the National Cancer Institute (SMHS: R01 CA82729; SWHS: R37 CA70837 and contract NO2-CP-11010 with Vanderbilt University; SCHS: R01 CA55069, R35 CA53890, R01 CA80205 and R01 CA144034). We thank M.C. Yu and H.-P. Lee for establishing this cohort. Cancer cases were identified through database linkage by the Ministry of Health in Singapore. The Shanxi Upper Gastrointestinal Cancer Genetics Project was supported by the National Cancer Institute contract NO2-SC-66211 with the Shanxi Cancer Hospital and Institute. The Nutrition Intervention Trials (NIT) were supported by National Cancer Institute contracts NO1-SC-91030 and HHSN261200477001C with the Cancer Institute of the Chinese Academy of Medical Sciences. The current analysis was supported by the Intramural Research Program of the NIH, National Cancer Institute, the Division of Cancer Epidemiology and Genetics, and the Center for Cancer Research.
The authors declare no competing financial interests.
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Abnet, C., Freedman, N., Hu, N. et al. A shared susceptibility locus in PLCE1 at 10q23 for gastric adenocarcinoma and esophageal squamous cell carcinoma. Nat Genet 42, 764–767 (2010). https://doi.org/10.1038/ng.649
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