Abstract
Through a genome-wide association analysis with a total of 7,035 individuals with duodenal ulcer and 25,323 controls from Japan, we identified two susceptibility loci at the PSCA gene (encoding prostate stem cell antigen) at 8q24 and at the ABO blood group locus at 9q34. The C allele of rs2294008 at PSCA was associated with increased risk of duodenal ulcer (odds ratio (OR) = 1.84; P = 3.92 × 10−33) in a recessive model but was associated with decreased risk of gastric cancer (OR = 0.79; P = 6.79 × 10−12), as reported previously1. The T allele of rs2294008 encodes a translation initiation codon upstream of the reported site and changes protein localization from the cytoplasm to the cell surface. rs505922 at ABO was also associated with duodenal ulcer in a recessive model (OR = 1.32; P = 1.15 × 10−10). Our findings demonstrate a role for genetic variants in the pathogenesis of duodenal ulcer.
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Acknowledgements
We thank all the subjects and the members of the Rotary Club of Osaka-Midosuji District 2660 Rotary International in Japan, who donated their DNA for this work. We also thank A. Matsui and H. Tagaya and the technical staff of the Laboratory for Genotyping Development at the Center for Genomic Medicine at RIKEN for their technical support. This work was conducted as a part of the BioBank Japan Project, which was supported by the Ministry of Education, Culture, Sports, Science and Technology of the Japanese government.
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C.T., Y.N. and K. Matsuda conceived and designed the study. Y.U., K. Matsuo and M.K. performed genotyping. A.T. and N.K. performed quality control analysis for the GWAS. Y.N., K. Matsuda and M.K. managed DNA samples belonging to BioBank Japan. H.I. and K.T. managed DNA samples from the Aichi Cancer Center. C.T. analyzed and summarized all the results. C.T., Y.N. and K. Matsuda wrote the manuscript. Y.N. obtained funding for the study.
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Tanikawa, C., Urabe, Y., Matsuo, K. et al. A genome-wide association study identifies two susceptibility loci for duodenal ulcer in the Japanese population. Nat Genet 44, 430–434 (2012). https://doi.org/10.1038/ng.1109
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DOI: https://doi.org/10.1038/ng.1109
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