- 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
- et al.
© 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.