Fine-scale mapping at 9p22.2 identifies candidate causal variants that modify ovarian cancer risk in BRCA1 and BRCA2 mutation carriers

Vigorito, E. et al. (2016) Fine-scale mapping at 9p22.2 identifies candidate causal variants that modify ovarian cancer risk in BRCA1 and BRCA2 mutation carriers. PLoS ONE, 11(7), e0158801. (doi: 10.1371/journal.pone.0158801) (PMID:27463617) (PMCID:PMC4963094)

Abstract

Population-based genome wide association studies have identified a locus at 9p22.2 associated with ovarian cancer risk, which also modifies ovarian cancer risk in BRCA1 and BRCA2 mutation carriers. We conducted fine-scale mapping at 9p22.2 to identify potential causal variants in BRCA1 and BRCA2 mutation carriers. Genotype data were available for 15,252 (2,462 ovarian cancer cases) BRCA1 and 8,211 (631 ovarian cancer cases) BRCA2 mutation carriers. Following genotype imputation, ovarian cancer associations were assessed for 4,873 and 5,020 SNPs in BRCA1 and BRCA 2 mutation carriers respectively, within a retrospective cohort analytical framework. In BRCA1 mutation carriers one set of eight correlated candidate causal variants for ovarian cancer risk modification was identified (top SNP rs10124837, HR: 0.73, 95%CI: 0.68 to 0.79, p-value 2× 10−16). These variants were located up to 20 kb upstream of BNC2. In BRCA2 mutation carriers one region, up to 45 kb upstream of BNC2, and containing 100 correlated SNPs was identified as candidate causal (top SNP rs62543585, HR: 0.69, 95%CI: 0.59 to 0.80, p-value 1.0 × 10−6). The candidate causal in BRCA1 mutation carriers did not include the strongest associated variant at this locus in the general population. In sum, we identified a set of candidate causal variants in a region that encompasses the BNC2 transcription start site. The ovarian cancer association at 9p22.2 may be mediated by different variants in BRCA1 mutation carriers and in the general population. Thus, potentially different mechanisms may underlie ovarian cancer risk for mutation carriers and the general population.

• Item Type: Articles
• Additional Information: The CIMBA data management and data analysis were supported by Cancer Research – UK grants C12292/A11174 and C1287/A10118. EV was supported by an MRC Advanced Studentship award.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: UNSPECIFIED
• Authors: Vigorito, E., Kuchenbaecker, K. B., Beesley, J., Adlard, J., Agnarsson, B. A., Andrulis, I. L., Arun, B. K., Barjhoux, L., Belotti, M., Benitez, J., Berger, A., Bojesen, A., Bonanni, B., Brewer, C., Caldes, T., Caligo, M. A., Campbell, I., Chan, S. B., Claes, K. B. M., Cohn, D. E., Cook, J., Daly, M. B., Damiola, F., Davidson, R., Pauw, A. d., Delnatte, C., Diez, O., Domchek, S. M., Dumont, M., Durda, K., Dworniczak, B., Easton, D. F., Eccles, D., Edwinsdotter Ardnor, C., Eeles, R., Ejlertsen, B., Ellis, S., Evans, D. G., Feliubadalo, L., Fostira, F., Foulkes, W. D., Friedman, E., Frost, D., Gaddam, P., Ganz, P. A., Garber, J., Garcia-Barberan, V., Gauthier-Villars, M., Gehrig, A., Gerdes, A.-M., Giraud, S., Godwin, A. K., Goldgar, D. E., Hake, C. R., Hansen, T. V. O., Healey, S., Hodgson, S., Hogervorst, F. B. L., Houdayer, C., Hulick, P. J., Imyanitov, E. N., Isaacs, C., Izatt, L., Izquierdo, A., Jacobs, L., Jakubowska, A., Janavicius, R., Jaworska-Bieniek, K., Jensen, U. B., John, E. M., Vijai, J., Karlan, B. Y., Kast, K., Investigators, K., Khan, S., Kwong, A., Laitman, Y., Lester, J., Lesueur, F., Liljegren, A., Lubinski, J., Mai, P. L., Manoukian, S., Mazoyer, S., Meindl, A., Mensenkamp, A. R., Montagna, M., Nathanson, K. L., Neuhausen, S. L., Nevanlinna, H., Niederacher, D., Olah, E., Olopade, O. I., Ong, K.-r., Osorio, A., Park, S. K., Paulsson-Karlsson, Y., Pedersen, I. S., Peissel, B., Peterlongo, P., Pfeiler, G., Phelan, C. M., Piedmonte, M., Poppe, B., Pujana, M. A., Radice, P., Rennert, G., Rodriguez, G. C., Rookus, M. A., Ross, E. A., Schmutzler, R. K., Simard, J., Singer, C. F., Slavin, T. P., Soucy, P., Southey, M., Steinemann, D., Stoppa-Lyonnet, D., Sukiennicki, G., Sutter, C., Szabo, C. I., Tea, M.-K., Teixeira, M. R., Teo, S.-H., Terry, M. B., Thomassen, M., Tibiletti, M. G., Tihomirova, L., Tognazzo, S., van Rensburg, E. J., Varesco, L., Varon-Mateeva, R., Vratimos, A., Weitzel, J. N., McGuffog, L., Kirk, J., Toland, A. E., Hamann, U., Lindor, N., Ramus, S. J., Greene, M. H., Couch, F. J., Offit, K., Pharoah, P. D. P., Chenevix-Trench, G., and Antoniou, A. C.
• College/School: College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
• Journal Name: PLoS ONE
• Publisher: Public Library of Science
• ISSN: 1932-6203
• ISSN (Online): 1932-6203
• Copyright Holders: Copyright © 2016 The Authors
• First Published: First published in PLoS ONE 11(7): e0158801
• Publisher Policy: Reproduced under a Creative Commons License