- Wang, Z;
- Dai, J;
- Hu, N;
- Miao, X;
- Abnet, CC;
- Yang, M;
- Freedman, ND;
- Chen, J;
- Burdette, L;
- Zhu, X;
- Chung, CC;
- Ren, C;
- Dawsey, SM;
- Wang, M;
- Ding, T;
- Du, J;
- Gao, YT;
- Zhong, R;
- Giffen, C;
- Pan, W;
- Koh, WP;
- Dai, N;
- Liao, LM;
- Yan, C;
- Qiao, YL;
- Jiang, Y;
- Shu, XO;
- Chen, J;
- Wang, C;
- Ma, H;
- Su, H;
- Zhang, Z;
- Wang, L;
- Wu, C;
- Xiang, YB;
- Hu, Z;
- Yuan, JM;
- Xie, L;
- Zheng, W;
- Lin, D;
- Chanock, SJ;
- Shi, Y;
- Goldstein, AM;
- Jin, G;
- Taylor, PR;
- Shen, H
© 2017, BMJ Publishing Group. All rights reserved. Objective: Although several genome-wide association studies (GWAS) of non-cardia gastric cancer have been published, more novel association signals could be exploited by combining individual studies together, which will further elucidate the genetic susceptibility of non-cardia gastric cancer. Design: We conducted a meta-analysis of two published Chinese GWAS studies (2031 non-cardia gastric cancer cases and 4970 cancer-free controls) and followed by genotyping of additional 3564 cases and 4637 controls in two stages. Results: The overall meta-analysis revealed two new association signals. The first was a novel locus at 5q14.3 and marked by rs7712641 (per-allele OR=0.84, 95% CI 0.80 to 0.88; p=1.21×10-11). This single-nucleotide polymorphism (SNP) marker maps to the intron of the long non-coding RNA, lnc-POLR3G-4 (XLOC-004464), which we observed has lower expression in non-cardia gastric tumour compared with matched normal tissue (Pwilcoxon signed-rank=7.20×10-4). We also identified a new signal at the 1q22 locus, rs80142782 (per-allele OR=0.62; 95% CI 0.56 to 0.69; p=1.71×10-19), which was independent of the previously reported SNP at the same locus, rs4072037 (per-allele OR=0.74; 95% CI 0.69 to 0.79; p=6.28×10-17). Analysis of the new SNP conditioned on the known SNP showed that the new SNP remained genome-wide significant (Pconditional=3.47×10-8). Interestingly, rs80142782 has a minor allele frequency of 0.05 in East Asians but is monomorphic in both European and African populations. Conclusion: These findings add new evidence for inherited genetic susceptibility to non-cardia gastric cancer and provide further clues to its aetiology in the Han Chinese population.