Abstract
The international Testicular Cancer Consortium (TECAC) combined five published genome-wide association studies of testicular germ cell tumor (TGCT; 3,558 cases and 13,970 controls) to identify new susceptibility loci. We conducted a fixed-effects meta-analysis, including, to our knowledge, the first analysis of the X chromosome. Eight new loci mapping to 2q14.2, 3q26.2, 4q35.2, 7q36.3, 10q26.13, 15q21.3, 15q22.31, and Xq28 achieved genome-wide significance (P < 5 × 10−8). Most loci harbor biologically plausible candidate genes. We refined previously reported associations at 9p24.3 and 19p12 by identifying one and three additional independent SNPs, respectively. In aggregate, the 39 independent markers identified to date explain 37% of father-to-son familial risk, 8% of which can be attributed to the 12 new signals reported here. Our findings substantially increase the number of known TGCT susceptibility alleles, move the field closer to a comprehensive understanding of the underlying genetic architecture of TGCT, and provide further clues to the etiology of TGCT.
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Acknowledgements
The content of this publication does not necessarily reflect the views or policies of the Department of Health and Human Services nor does the mention of trade names, commercial products, or organizations indicate endorsement by the US government. We thank B. Weathers for her coordination of TECAC, J. Pluta for biostatistical assistance, and K. D'Andrea for expert assistance with SNP genotyping. We thank D.R. Stewart and J.T. Loud for critical support of the NCI Clinical Genetics Branch Familial Testicular Cancer Project (NCI 02-C-0178; NCT-00039598). We also thank all previous contributors to the GWAS analyzed in this study, including N. Weinhold, D. Edsgärd, H. Leffers, and A. Juul, N.E. Skakkebæk, and S. Brunak from the Danish study.
The Testicular Cancer Consortium is supported by National Institutes of Health grant U01CA164947 to K.L.N., P.A.K., and S.M.S. A portion of this work was supported by the Intramural Research Program of the National Cancer Institute and by support services contract HHSN26120130003C with IMS, Inc. The Penn GWAS (Penn) was supported by the Abramson Cancer Center at the University of Pennsylvania and National Institute of Health grant CA114478 to K.L.N. and P.A.K. The UK testicular cancer study was supported by the Institute of Cancer Research, Cancer Research UK, and made use of control data generated by the Wellcome Trust Case Control Consortium 2 (WTCCC2). C.T. is supported by the Movember Foundation. K.L. is supported by a PhD fellowship from Cancer Research UK. L.C.P. is supported by the National Institutes of Health (T32-GM008638). The contribution from the University of Leeds was funded by Cancer Research UK (C588/A19167). The Norwegian/Swedish study was supported by the Norwegian Cancer Society (grants 418975–71081–PR-2006-0387 and PK01-2007-0375); the Nordic Cancer Union (grant S-12/07), and the Swedish Cancer Society (grants 2008/708, 2010/808, 2011/484, and CAN2012/823). The Danish GWAS was supported by the Villum Kann Rasmussen Foundation, a NABIIT grant from the Danish Strategic Research Council, the Novo Nordisk Foundation, the Danish Cancer Society, and the Danish and Swedish Childhood Cancer Foundation.
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K.L.N. and P.A.K. supervised the overall study. K.A.M., E.R.-D.M., D.T.B., M.D.D., M.H.G., R.G., T.G., T.B.H., K.L., K.N., S.M.S., F.W., C.T., P.A.K., and K.L.N. contributed to recruitment and to study, data management. Z.W., K.A.M., E.R.-D.M., D.T.B., M.D.D., M.H.G., R.G., T.G., T.B.H., R.K., K.L., N.M., K.N., S.V., F.W., C.T., S.J.C., P.A.K., and K.L.N. contributed to genotyping or association analysis of individual studies. Z.W., C.C.C., L.C.P., V.T., S.J.C., P.A.K., and K.L.N. carried out the meta-analysis and the additional bioinformatics analyses, including using GTEx and TCGA TGCT data. Z.W., P.A.K., and K.L.N. drafted the initial manuscript, and all authors reviewed and contributed to the manuscript.
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Wang, Z., McGlynn, K., Rajpert-De Meyts, E. et al. Meta-analysis of five genome-wide association studies identifies multiple new loci associated with testicular germ cell tumor. Nat Genet 49, 1141–1147 (2017). https://doi.org/10.1038/ng.3879
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DOI: https://doi.org/10.1038/ng.3879
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