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1. Genome-wide association study identifies 32 novel breast cancer susceptibility loci from overall and subtype-specific analyses.

Author

Zhang, Haoyu, Ahearn, Thomas U, Lecarpentier, Julie, Barnes, Daniel, Beesley, Jonathan, Qi, Guanghao, Jiang, Xia, O'Mara, Tracy A, Zhao, Ni, Bolla, Manjeet K, Dunning, Alison M, Dennis, Joe, Wang, Qin, Ful, Zumuruda Abu, Aittomäki, Kristiina, Andrulis, Irene L, Anton-Culver, Hoda, Arndt, Volker, Aronson, Kristan J, Arun, Banu K, Auer, Paul L, Azzollini, Jacopo, Barrowdale, Daniel, Becher, Heiko, Beckmann, Matthias W, Behrens, Sabine, Benitez, Javier, Bermisheva, Marina, Bialkowska, Katarzyna, Blanco, Ana, Blomqvist, Carl, Bogdanova, Natalia V, Bojesen, Stig E, Bonanni, Bernardo, Bondavalli, Davide, Borg, Ake, Brauch, Hiltrud, Brenner, Hermann, Briceno, Ignacio, Broeks, Annegien, Brucker, Sara Y, Brüning, Thomas, Burwinkel, Barbara, Buys, Saundra S, Byers, Helen, Caldés, Trinidad, Caligo, Maria A, Calvello, Mariarosaria, Campa, Daniele, Castelao, Jose E, Chang-Claude, Jenny, Chanock, Stephen J, Christiaens, Melissa, Christiansen, Hans, Chung, Wendy K, Claes, Kathleen BM, Clarke, Christine L, Cornelissen, Sten, Couch, Fergus J, Cox, Angela, Cross, Simon S, Czene, Kamila, Daly, Mary B, Devilee, Peter, Diez, Orland, Domchek, Susan M, Dörk, Thilo, Dwek, Miriam, Eccles, Diana M, Ekici, Arif B, Evans, D Gareth, Fasching, Peter A, Figueroa, Jonine, Foretova, Lenka, Fostira, Florentia, Friedman, Eitan, Frost, Debra, Gago-Dominguez, Manuela, Gapstur, Susan M, Garber, Judy, García-Sáenz, José A, Gaudet, Mia M, Gayther, Simon A, Giles, Graham G, Godwin, Andrew K, Goldberg, Mark S, Goldgar, David E, González-Neira, Anna, Greene, Mark H, Gronwald, Jacek, Guénel, Pascal, Häberle, Lothar, Hahnen, Eric, Haiman, Christopher A, Hake, Christopher R, Hall, Per, Hamann, Ute, Harkness, Elaine F, Heemskerk-Gerritsen, Bernadette AM, and Hillemanns, Peter

Subjects
kConFab Investigators, ABCTB Investigators, EMBRACE Study, GEMO Study Collaborators, Humans, Breast Neoplasms, Genetic Predisposition to Disease, BRCA1 Protein, Case-Control Studies, Linkage Disequilibrium, Mutation, Female, Genome-Wide Association Study, Triple Negative Breast Neoplasms, Human Genome, Cancer, Prevention, Genetics, Breast Cancer, 2.1 Biological and endogenous factors, Developmental Biology, Biological Sciences, Medical and Health Sciences
Abstract

Breast cancer susceptibility variants frequently show heterogeneity in associations by tumor subtype1-3. To identify novel loci, we performed a genome-wide association study including 133,384 breast cancer cases and 113,789 controls, plus 18,908 BRCA1 mutation carriers (9,414 with breast cancer) of European ancestry, using both standard and novel methodologies that account for underlying tumor heterogeneity by estrogen receptor, progesterone receptor and human epidermal growth factor receptor 2 status and tumor grade. We identified 32 novel susceptibility loci (P

Published
2020

2. Genome-wide association study of germline variants and breast cancer-specific mortality.

Author

Escala-Garcia, Maria, Guo, Qi, Dörk, Thilo, Canisius, Sander, Keeman, Renske, Dennis, Joe, Beesley, Jonathan, Lecarpentier, Julie, Bolla, Manjeet K, Wang, Qin, Abraham, Jean, Andrulis, Irene L, Anton-Culver, Hoda, Arndt, Volker, Auer, Paul L, Beckmann, Matthias W, Behrens, Sabine, Benitez, Javier, Bermisheva, Marina, Bernstein, Leslie, Blomqvist, Carl, Boeckx, Bram, Bojesen, Stig E, Bonanni, Bernardo, Børresen-Dale, Anne-Lise, Brauch, Hiltrud, Brenner, Hermann, Brentnall, Adam, Brinton, Louise, Broberg, Per, Brock, Ian W, Brucker, Sara Y, Burwinkel, Barbara, Caldas, Carlos, Caldés, Trinidad, Campa, Daniele, Canzian, Federico, Carracedo, Angel, Carter, Brian D, Castelao, Jose E, Chang-Claude, Jenny, Chanock, Stephen J, Chenevix-Trench, Georgia, Cheng, Ting-Yuan David, Chin, Suet-Feung, Clarke, Christine L, NBCS Collaborators, Cordina-Duverger, Emilie, Couch, Fergus J, Cox, David G, Cox, Angela, Cross, Simon S, Czene, Kamila, Daly, Mary B, Devilee, Peter, Dunn, Janet A, Dunning, Alison M, Durcan, Lorraine, Dwek, Miriam, Earl, Helena M, Ekici, Arif B, Eliassen, A Heather, Ellberg, Carolina, Engel, Christoph, Eriksson, Mikael, Evans, D Gareth, Figueroa, Jonine, Flesch-Janys, Dieter, Flyger, Henrik, Gabrielson, Marike, Gago-Dominguez, Manuela, Galle, Eva, Gapstur, Susan M, García-Closas, Montserrat, García-Sáenz, José A, Gaudet, Mia M, George, Angela, Georgoulias, Vassilios, Giles, Graham G, Glendon, Gord, Goldgar, David E, González-Neira, Anna, Alnæs, Grethe I Grenaker, Grip, Mervi, Guénel, Pascal, Haeberle, Lothar, Hahnen, Eric, Haiman, Christopher A, Håkansson, Niclas, Hall, Per, Hamann, Ute, Hankinson, Susan, Harkness, Elaine F, Harrington, Patricia A, Hart, Steven N, Hartikainen, Jaana M, Hein, Alexander, Hillemanns, Peter, Hiller, Louise, and Holleczek, Bernd

Subjects
NBCS Collaborators, Chromosomes, Human, Pair 7, Humans, Breast Neoplasms, Receptors, Estrogen, Prognosis, Proportional Hazards Models, Bayes Theorem, Female, Genetic Variation, Genome-Wide Association Study, White People, Genetics, Breast Cancer, Human Genome, Cancer, Aetiology, 2.1 Biological and endogenous factors, Good Health and Well Being, Oncology and Carcinogenesis, Public Health and Health Services, Oncology & Carcinogenesis
Abstract

BackgroundWe examined the associations between germline variants and breast cancer mortality using a large meta-analysis of women of European ancestry.MethodsMeta-analyses included summary estimates based on Cox models of twelve datasets using ~10.4 million variants for 96,661 women with breast cancer and 7697 events (breast cancer-specific deaths). Oestrogen receptor (ER)-specific analyses were based on 64,171 ER-positive (4116) and 16,172 ER-negative (2125) patients. We evaluated the probability of a signal to be a true positive using the Bayesian false discovery probability (BFDP).ResultsWe did not find any variant associated with breast cancer-specific mortality at P

Published
2019

3. Identification of ten variants associated with risk of estrogen-receptor-negative breast cancer

Author

Milne, Roger L., Kuchenbaecker, Karoline B., Michailidou, Kyriaki, Beesley, Jonathan, Kar, Siddhartha, Lindstrom, Sara, Hui, Shirley, Lemaçon, Audrey, Soucy, Penny, Dennis, Joe, Jiang, Xia, Rostamianfar, Asha, Finucane, Hilary, Bolla, Manjeet K., McGuffog, Lesley, Wang, Qin, Aalfs, Cora M., Abctctb, Investigators, Adams, Marcia, Adlard, Julian, Agata, Simona, Ahmed, Shahana, Ahsan, Habibul, Aittom, Kristiina Äki, Fares, Al Ejeh, Allen, Jamie, Ambrosone, Christine B., Amos, Christopher I., Andrulis, Irene L., Anton-Culver, Hoda, Antonenkova, Natalia N., Arndt, Volker, Arnold, Norbert, Aronson, Kristan J., Auber, Bernd, Auer, Paul L., Ausems, Margreet G.M., Azzollini, Jacopo, François, Bacot, Balma, Judith Nã, Barile, Monica, Barjhoux, Laure, Barkardottir, Rosa B., Barrdahl, Myrto, Barnes, Daniel, Barrowdale, Daniel, Baynes, Caroline, Beckmann, Matthias W., Benitez, Javier, Bermisheva, Marina, Bernstein, Leslie, Bignon, Yves Jean, Blazer, Kathleen R., Blok, Marinus J., Blomqvist, Carl, Blot, William, Bobolis, Kristie, Boeckx, Bram, Bogdanova, Natalia V., Bojesen, Anders, Bojesen, Stig E., Bonanni, Bernardo, Anne-Lise, Børresen Dale, Bozsik, Aniko, Bradbury, Angela R., Brand, Judith S., Brauch, Hiltrud, Brenner, Hermann, Brigitte, Bressac De Paillerets, Brewer, Carole, Brinton, Louise, Broberg, Per, Angela, Brooks Wilson, Brunet, Joan, Brüning, Thomas, Burwinkel, Barbara, Buys, Saundra S., Byun, Jinyoung, Cai, Qiuyin, Cald, Trinidad És, Caligo, Maria A., Campbell, Ian, Canzian, Federico, Caron, Olivier, Carracedo, Angel, Carter, Brian D., Esteban, Castelao, Castera, Laurent, Virginie, Caux Moncoutier, Chan, Salina B., Jenny, Chang Claude, Chanock, Stephen J., Chen, Xiaoqing, Cheng, Ting Yuan David, Chiquette, Jocelyne, Christiansen, Hans, Claes, Kathleen B., Clarke, Christine L., Conner, Thomas, Conroy, Don M., Cook, Jackie, Cordina-Duverger, Emilie, Cornelissen, Sten, Coupier, Isabelle, Cox, Angela, Cox, David G., Cross, Simon S., Cuk, Katarina, Cunningham, J. M., Czene, Kamila, Daly, Mary B., Damiola, Francesca, Darabi, Hatef, Davidson, Rosemarie, Leeneer, Kim De L., Devilee, Peter, Dicks, Ed, Diez, Orland, Ding, Yuan Chun, Ditsch, Nina, Doheny, Kimberly F., Domchek, Susan M., Dorfling, Cecilia M., Dörk, Thilo, Dos-Santos-Silva, Isabel, Dubois, Stéphane, Dugué, Pierre Antoine, Dumont, Martine, Dunning, Alison M., Durcan, Lorraine, Dwek, Miriam, Dworniczak, Bernd, Eccles, Diana, Eeles, Ros, Ehrencrona, Hans, Eilber, Ursula, Ejlertsen, Bent, Ekici, Arif B., Eliassen, A. Heather, Engel, Christoph, Eriksson, Mikael, Fachal, Laura, Faivre, Laurence, Fasching, Peter A., Faust, Ulrike, Figueroa, Jonine, Flesch-Janys, Dieter, Fletcher, Olivia, Flyger, Henrik, Foulkes, William D., Friedman, Eitan, Fritschi, Lin, Frost, Debra, Gabrielson, Marike, Gaddam, Pragna, Gammon, Marilie D., Ganz, Patricia A., Gapstur, Susan M., Garber, Judy, Garcia-Barberan, Vanesa, Garciá-Saénz, José A., Gaudet, Mia M., Gauthier-Villars, Marion, Gehrig, Andrea, Georgoulias, Vassilios, Gerdes, Anne Marie, Giles, Graham G., Glendon, Gord, Godwin, Andrew K., Goldberg, Mark S., Goldgar, David E., González-Neira, Anna, Goodfellow, Paul, Greene, Mark H., Grenaker, Grethe Alnæs I., Grip, Mervi, Gronwald, Jacek, Grundy, Anne, Gschwantler, Daphne Kaulich, Guénel, Pascal, Guo, Qi, Haeberle, Lothar, Hahnen, Eric, Haiman, Christopher A., Håkansson, Niclas, Hallberg, Emily, Hamann, Ute, Hamel, Nathalie, Hankinson, Susan, Hansen, Thomas V., Harrington, Patricia, Hart, Steven N., Hartikainen, Jaana M., Healey, Catherine S., Hein, Alexander, Helbig, Sonja, Henderson, Alex, Heyworth, Jane, Hicks, Belynda, Hillemanns, Peter, Hodgson, Shirley, Hogervorst, Frans B., Hollestelle, Antoinette, Hooning, Maartje J., Hoover, Bob, Hopper, John L., Hu, Chunling, Huang, Guanmengqian, Hulick, Peter J., Humphreys, Keith, Hunter, David J., Imyanitov, Evgeny N., Isaacs, Claudine, Iwasaki, Motoki, Izatt, Louise, Jakubowska, Anna, James, Paul, Janavicius, Ramunas, Janni, Wolfgang, Jensen, Uffe Birk, John, Esther M., Johnson, Nichola, Jones, Kristine, Jones, Michael, Jukkola-Vuorinen, Arja, Kaaks, Rudolf, Kabisch, Maria, Kaczmarek, Katarzyna, Kang, Daehee, Kast, Karin, Keeman, Renske, Kerin, Michael J., Kets, Carolien M., Keupers, Mac Hteld, Khan, Sofia, Khusnutdinova, Elza, Kiiski, Johanna I., Kim, Sung Won, Knight, Julia A., Konstantopoulou, Irene, Kosma, Veli Matti, Kristensen, Vessela N., Kruse, Torben A., Kwong, Ava, Lænkholm, Anne Vibeke, Laitman, Yael, Lalloo, Fiona, Lambrechts, Diether, Landsman, Keren, Lasset, Christine, Lazaro, Conxi, Marchand, Loic Le, Lindström, Sara, Al-Ejeh, Fares, Margreet, G. M.Ausems, Bacot, François, Børresen-Dale, Anne Lise, Bressac-De, Brigitte Paillerets, Brooks-Wilson, Angela, Castelao, J. Esteban, Caux-Moncoutier, Virginie, Chang-Claude, Jenny, McLaes, Kathleen B., Leeneer, Kim De, Dieter, Flesch Janys, Gschwantler-Kaulich, Daphne, Keupers, MacHteld, Lecarpentier, Julie, Lee, Andrew, Lee, Eunjung, Won, Jong Lee, Lee, Min Hyuk, Lejbkowicz, Flavio, Lesueur, Fabienne, Li, Jingmei, Lilyquist, Jenna, Lincoln, Anne, Lindblom, Annika, Lissowska, Jolanta, Lo, Wing Yee, Loibl, Sibylle, Long, Jirong, Loud, Jennifer T., Lubinski, Jan, Luccarini, Craig, Lush, Michael, MacInnis, Robert J., Maishman, Tom, Makalic, Enes, Kostovska, Ivana Maleva, Malone, Kathleen E., Siranoush, Manoukian, Manson, Joann E., Margolin, Sara, Martens, John W., Martinez, Maria Elena, Matsuo, Keitaro, Mavroudis, Dimitrios, Mazoyer, Sylvie, McLean, Catriona, Meijers-Heijboer, Hanne, Menéndez, Primitiva, Meyer, Jeffery, Miao, Hui, Miller, Austin, Miller, Nicola, Mitchell, Gillian, Montagna, Marco, Muir, Kenneth, Mulligan, Anna Marie, Mulot, Claire, Nadesan, Sue, Nathanson, Katherine L., Neuhausen, Susan L., Nevanlinna, Heli, Nevelsteen, Ines, Niederacher, Dieter, Nielsen, Sune F., Nordestgaard, Børge G., Norman, Aaron, Nussbaum, Robert L., Olah, Edith, Olopade, Olufunmilayo I., Olson, Janet E., Olswold, Curtis, Ong, Kai Ren, Oosterwijk, Jan C., Orr, Nick, Osorio, Ana, Pankratz, V. Shane, Papi, Laura, Park-Simon, Tjoung Won, Paulsson-Karlsson, Ylva, Lloyd, Rachel, Pedersen, Inge Søkilde, Peissel, Bernard, Peixoto, Ana, Perez, Jose I., Peterlongo, Paolo, Peto, Julian, Pfeiler, Georg, Phelan, Catherine M., Pinchev, Mila, Plaseska-Karanfilska, Dijana, Poppe, Bruce, Porteous, Mary E., Prentice, Ross, Presneau, Nadege, Prokofieva, Darya, Pugh, Elizabeth, Pujana, Miquel Angel, Pylkäs, Katri, Rack, Brigitte, Radice, Paolo, Rahman, Nazneen, Rantala, Johanna, Rappaport-Fuerhauser, Christine, Rennert, Gad, Rennert, Hedy S., Rhenius, Valerie, Rhiem, Kerstin, Richardson, Andrea, Rodriguez, Gustavo C., Romero, Atocha, Romm, Jane, Rookus, Matti A., Rudolph, Anja, Ruediger, Thomas, Saloustros, Emmanouil, Sanders, Joyce, Sandler, Dale P., Sangrajrang, Suleeporn, Sawyer, Elinor J., Schmidt, Daniel F., Schoemaker, Minouk J., Schumacher, Fredrick, Schürmann, Peter, Schwentner, Lukas, Scott, Christopher, Scott, Rodney J., Seal, Sheila, Senter, Leigha, Seynaeve, Caroline, Shah, Mitul, Sharma, Priyanka, Shen, Chen Yang, Sheng, Xin, Shimelis, Hermela, Shrubsole, Martha J., Shu, Xiao Ou, Side, Lucy E., Singer, Christian F., Sohn, Christof, Southey, Melissa C., Spinelli, John J., Spurdle, Amanda B., Stegmaier, Christa, Stoppa-Lyonnet, Dominique, Sukiennicki, Grzegorz, Surowy, Harald, Sutter, Christian, Swerdlow, Anthony, Szabo, Csilla I., Tamimi, Rulla M., Tan, Yen Y., Taylor, Jack A., Tejada, Maria Isabel, Tengström, Maria, Teo, Soo H., Terry, Mary B., Tessier, Daniel C., Teul, Alex E., Thöne, Kathrin, Thull, Darcy L., Tibiletti, Maria Grazia, Tihomirova, Laima, Tischkowitz, Marc, Toland, Amanda E., Tollenaar, Rob A.M., Tomlinson, Ian, Tong, Ling, Torres, Diana, Tranchant, Martine, Truong, Thérèse, Tucker, Kathy, Tung, Nadine, Tyrer, Jonathan, Ulmer, Hans Ulrich, Vachon, Celine, Christi, Van Asperen J., Den Berg, David Van, Ouweland, Ans M.Vanden, Rensburg, Elizabeth J., Varesco, Liliana, Varon-Mateeva, Raymonda, Vega, Ana, Viel, Alessandra, Vijai, Joseph, Vincent, Daniel, Vollenweider, Jason, Walker, Lisa, Wang, Zhaoming, Wang-Gohrke, Shan, Wappenschmidt, Barbara, Weinberg, Clarice R., Weitzel, Jeffrey N., Wendt, Camilla, Wesseling, Jelle, Whittemore, Alice S., Wijnen, Juul T., Willett, Walter, Winqvist, Robert, Wolk, Alicja, Wu, Anna H., Xia, Lucy, Yang, Xiaohong R., Yannoukakos, Drakoulis, Zaffaroni, Daniela, Zheng, Wei, Zhu, Bin, Ziogas, Argyrios, Ziv, Elad, Zorn, Kristin K., Gago-Dominguez, Manuela, Mannermaa, Arto, Olsson, Håkan, Teixeira, Manuel R., Stone, Jennifer, Offit, Kenneth, Ottini, Laura, Park, Sue K., Thomassen, Mads, Hall, Per, Meindl, Alfons, Schmutzler, Rita K., Droit, Arnaud, Bader, Gary D., Pharoah, Paul D., Couch, Fergus J., Easton, Douglas F., Kraft, Peter, Chenevix-Trench, Georgia, Garciá-Closas, Montserrat, Schmidt, Marjanka K., Antoniou, Antonis C., Simard, Jacques, Damage and Repair in Cancer Development and Cancer Treatment (DARE), Targeted Gynaecologic Oncology (TARGON), Human Genetics, CCA - Cancer biology and immunology, Epidemiology and Data Science, Amsterdam Neuroscience - Complex Trait Genetics, Human genetics, Amsterdam Reproduction & Development (AR&D), Clinical Genetics, Medical Oncology, Internal Medicine, Obstetrics & Gynecology, MUMC+: DA KG Lab Centraal Lab (9), and RS: GROW - R4 - Reproductive and Perinatal Medicine

Subjects
0301 basic medicine, Oncology, Estrogen receptor, Genome-wide association study, consortium, Gene mutation, DISEASE, Breast cancer, Risk Factors, Receptors, common variants, BRCA2 MUTATION CARRIERS, Medicine and Health Sciences, CONFER SUSCEPTIBILITY, skin and connective tissue diseases, ovarian cancers, BRCA1 Protein, COMMON VARIANTS, Single Nucleotide, OVARIAN CANCERS, 3. Good health, Women's cancers Radboud Institute for Health Sciences [Radboudumc 17], Receptors, Estrogen, functional variants, Female, estrogen receptor, SNPs, EXPRESSION, medicine.medical_specialty, Heterozygote, SUSCEPTIBILITY LOCI, European Continental Ancestry Group, Breast cancer, estrogen receptor, SNPs, Single-nucleotide polymorphism, Breast Neoplasms, Biology, Polymorphism, Single Nucleotide, White People, Article, Càncer de mama, 03 medical and health sciences, SDG 3 - Good Health and Well-being, Internal medicine, expression, medicine, Genetic predisposition, Genetics, Journal Article, Humans, Genetic Predisposition to Disease, ddc:610, Risk factor, Polymorphism, GENOME-WIDE ASSOCIATION, FUNCTIONAL VARIANTS, disease, CONSORTIUM, Case-control study, Biology and Life Sciences, medicine.disease, confer susceptibility, Estrogen, susceptibility loci, 030104 developmental biology, Mutation, genome-wide association, brca2 mutation carriers, Genome-Wide Association Study
Abstract

Most common breast cancer susceptibility variants have been identified through genome-wide association studies (GWAS) of predominantly estrogen receptor (ER)-positive disease1. We conducted a GWAS using 21,468 ER-negative cases and 100,594 controls combined with 18,908 BRCA1 mutation carriers (9,414 with breast cancer), all of European origin. We identified independent associations at P < 5 × 10−8 with ten variants at nine new loci. At P < 0.05, we replicated associations with 10 of 11 variants previously reported in ER-negative disease or BRCA1mutation carrier GWAS and observed consistent associations with ER-negative disease for 105 susceptibility variants identified by other studies. These 125 variants explain approximately 16% of the familial risk of this breast cancer subtype. There was high genetic correlation (0.72) between risk of ER-negative breast cancer and breast cancer risk for BRCA1 mutation carriers. These findings may lead to improved risk prediction and inform further fine-mapping and functional work to better understand the biological basis of ER-negative breast cancer.

Published
2017

4. Étude des facteurs modificateurs du risque de cancer du sein des femmes à risque génétique élevé

Author

Lecarpentier, Julie, Cancer et génome: Bioinformatique, biostatistiques et épidémiologie d'un système complexe, MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut Curie [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris Sud - Paris XI, and Nadine Andrieu

Subjects
Breast cancer, Facteurs de risque, endocrine system diseases, Risk factors, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, BRCA1/BRCA2, skin and connective tissue diseases, Cancer du sein
Abstract

Breast cancer is the most frequent and mortal cancer among French women. Mutations in BRCA1 and BRCA2 confer a high risk of breast cancer. The diversity of BRCA1 and BRCA2 mutations and of gyneco-obstetrical and life style risk factors may modify the magnitude of this risk. The objective of this study is to assess breast cancer risk taking into account gyneco-obstetrical and life style factors, location of mutation in BRCA1 and BRCA2 genes and there potential interaction.The data from 1337 women BRCA1 and BRCA2 mutation carriers of the French study GENEPSO have been analysed by using a weighted Cox regression model to take into account the bias of recruitment. Our results show an association between breast cancer risk and X-ray exposures, tobacco, body mass index, age at menarche, parity, interrupted pregnancies, oral contraceptives, menopausal status and hormone replacement therapy. We confirm the existence of a central low breast cancer risk region in BRCA1 (LR1 region between codons 374 and 1161) and in BRCA2 (LR2 region between codons 957 and 1827). In addition, a new high breast cancer risk region is found in the 3’ region of BRCA2 (HR2 region between codons 2546 and 2968). Moreover, our results suggest a variation in breast cancer risk associated with parity and menopausal status according to the location of the mutation in BRCA1 and BRCA2. Our findings show that, taking into account environmental and lifestyle modifiers, mutation position might be important for the clinical management of BRCA1 and BRCA2 mutation carriers and could also be helpful in understanding how BRCA1 and BRCA2 genes are involved in breast cancer.; Les femmes porteuses d’une mutation du gène BRCA1 ou BRCA2 ont un risque de cancer du sein (CS) très élevé dont les estimations varient beaucoup d’une étude à l’autre. L’objectif principal de cette étude est de mieux estimer le risque de CS associé aux gènes BRCA1/2 en tenant compte de la variabilité des mutations et des facteurs « environnementaux/style de vie » et de leur éventuelle interaction. Nous avons analysé les données de la cohorte GENEPSO composée de femmes porteuses d’une mutation du gène BRCA1 ou BRCA2 à l’aide d’un modèle de Cox pondéré. L’analyse des facteurs de risque gynéco-obstétrique et de « style de vie » a permis de mettre en évidence une association entre le risque de CS et les radiations ionisantes, la consommation de tabac, l’indice de masse corporelle, l’âge aux premières règles, la parité, les interruptions de grossesse, la contraception orale, la ménopause et les traitements hormonaux substitutifs. Cette étude confirme l’existence d’une zone centrale à moindre risque de CS dans les gènes BRCA1/2 et de décrire une nouvelle région à haut risque située dans la région 3’ du gène BRCA2. Cette étude montre également une interaction entre la localisation des mutations et la parité ainsi que la ménopause. Cette étude montre l’importance de la prise en compte simultanée des facteurs de risque « non génétiques » et de la localisation des mutations dans les gènes BRCA1/2 dans l’estimation des risques de CS. Si nos résultats sont confirmés sur de plus larges données, cette étude pourrait aider ces femmes dans le choix du type de stratégie de surveillance ou de prévention le mieux adapté à leur situation.

Published
2012

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