Identification of 19 new risk loci and potential regulatory mechanisms influencing susceptibility to testicular germ cell tumor.


Litchfield, K; Levy, M; Orlando, G; Loveday, C; Law, PJ; Migliorini, G; Holroyd, A; Broderick, P; Karlsson, R; Haugen, TB; Kristiansen, W; Nsengimana, J; Fenwick, K; Assiotis, I; Kote-Jarai, Z; Dunning, AM; Muir, K; Peto, J; Eeles, R; Easton, DF; Dudakia, D; Orr, N; Pashayan, N; UK Testicular Cancer Collaboration, ; PRACTICAL Consortium, ; Bishop, DT; Reid, A; Huddart, RA; Shipley, J; Grotmol, T; Wiklund, F; Houlston, RS; Turnbull, C; (2017) Identification of 19 new risk loci and potential regulatory mechanisms influencing susceptibility to testicular germ cell tumor. Nature genetics. ISSN 1061-4036 DOI: https://doi.org/10.1038/ng.3896

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Abstract

Genome-wide association studies (GWAS) have transformed understanding of susceptibility to testicular germ cell tumors (TGCTs), but much of the heritability remains unexplained. Here we report a new GWAS, a meta-analysis with previous GWAS and a replication series, totaling 7,319 TGCT cases and 23,082 controls. We identify 19 new TGCT risk loci, roughly doubling the number of known TGCT risk loci to 44. By performing in situ Hi-C in TGCT cells, we provide evidence for a network of physical interactions among all 44 TGCT risk SNPs and candidate causal genes. Our findings implicate widespread disruption of developmental transcriptional regulators as a basis of TGCT susceptibility, consistent with failed primordial germ cell differentiation as an initiating step in oncogenesis. Defective microtubule assembly and dysregulation of KIT-MAPK signaling also feature as recurrently disrupted pathways. Our findings support a polygenic model of risk and provide insight into the biological basis of TGCT.

Item Type: Article
Faculty and Department: Faculty of Epidemiology and Population Health > Dept of Non-Communicable Disease Epidemiology
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PubMed ID: 28604728
Web of Science ID: 404253300025
URI: http://researchonline.lshtm.ac.uk/id/eprint/3962439

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