Association of breast cancer risk in BRCA1 and BRCA2 mutation carriers with genetic variants showing differential allelic expression : identification of a modifier of breast cancer risk at locus 11q22.3

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Hamdi , Y , Soucy , P , Kuchenbaeker , K B , Pastinen , T , Droit , A , Lemacon , A , Adlard , J , Aittomäki , K , Andrulis , I L , Arason , A , Arnold , N , Arun , B K , Azzollini , J , Bane , A , Barjhoux , L , Barrowdale , D , Benitez , J , Berthet , P , Blok , M J , Bobolis , K , Bonadona , V , Bonanni , B , Bradbury , A R , Brewer , C , Buecher , B , Buys , S S , Caligo , M A , Chiquette , J , Chung , W K , Claes , K B M , Daly , M B , Damiola , F , Davidson , R , De la Hoya , M , De Leeneer , K , Diez , O , Ding , Y C , Dolcetti , R , Domchek , S M , Dorfling , C M , Eccles , D , Eeles , R , Einbeigi , Z , Ejlertsen , B , Engel , C , Evans , D G , Feliubadalo , L , Foretova , L , Fostira , F , Nevanlinna , H , EMBRACE , GEMO Study Collaborators , HEBON & KConFab Investigators 2017 , ' Association of breast cancer risk in BRCA1 and BRCA2 mutation carriers with genetic variants showing differential allelic expression : identification of a modifier of breast cancer risk at locus 11q22.3 ' Breast Cancer Research and Treatment , vol. 161 , no. 1 , pp. 117-134 . DOI: 10.1007/s10549-016-4018-2

Title: Association of breast cancer risk in BRCA1 and BRCA2 mutation carriers with genetic variants showing differential allelic expression : identification of a modifier of breast cancer risk at locus 11q22.3
Author: Hamdi, Yosr; Soucy, Penny; Kuchenbaeker, Karoline B.; Pastinen, Tomi; Droit, Arnaud; Lemacon, Audrey; Adlard, Julian; Aittomäki, Kristiina; Andrulis, Irene L.; Arason, Adalgeir; Arnold, Norbert; Arun, Banu K.; Azzollini, Jacopo; Bane, Anita; Barjhoux, Laure; Barrowdale, Daniel; Benitez, Javier; Berthet, Pascaline; Blok, Marinus J.; Bobolis, Kristie; Bonadona, Valerie; Bonanni, Bernardo; Bradbury, Angela R.; Brewer, Carole; Buecher, Bruno; Buys, Saundra S.; Caligo, Maria A.; Chiquette, Jocelyne; Chung, Wendy K.; Claes, Kathleen B. M.; Daly, Mary B.; Damiola, Francesca; Davidson, Rosemarie; De la Hoya, Miguel; De Leeneer, Kim; Diez, Orland; Ding, Yuan Chun; Dolcetti, Riccardo; Domchek, Susan M.; Dorfling, Cecilia M.; Eccles, Diana; Eeles, Ros; Einbeigi, Zakaria; Ejlertsen, Bent; Engel, Christoph; Evans, D. Gareth; Feliubadalo, Lidia; Foretova, Lenka; Fostira, Florentia; Nevanlinna, Heli; EMBRACE; GEMO Study Collaborators; HEBON; KConFab Investigators
Contributor: University of Helsinki, Department of Medical and Clinical Genetics
University of Helsinki, Department of Obstetrics and Gynegology
Date: 2017-01
Language: eng
Number of pages: 18
Belongs to series: Breast Cancer Research and Treatment
ISSN: 0167-6806
URI: http://hdl.handle.net/10138/176716
Abstract: Cis-acting regulatory SNPs resulting in differential allelic expression (DAE) may, in part, explain the underlying phenotypic variation associated with many complex diseases. To investigate whether common variants associated with DAE were involved in breast cancer susceptibility among BRCA1 and BRCA2 mutation carriers, a list of 175 genes was developed based of their involvement in cancer-related pathways. Using data from a genome-wide map of SNPs associated with allelic expression, we assessed the association of similar to 320 SNPs located in the vicinity of these genes with breast and ovarian cancer risks in 15,252 BRCA1 and 8211 BRCA2 mutation carriers ascertained from 54 studies participating in the Consortium of Investigators of Modifiers of BRCA1/2. We identified a region on 11q22.3 that is significantly associated with breast cancer risk in BRCA1 mutation carriers (most significant SNP rs228595 p = 7 x 10(-6)). This association was absent in BRCA2 carriers (p = 0.57). The 11q22.3 region notably encompasses genes such as ACAT1, NPAT, and ATM. Expression quantitative trait loci associations were observed in both normal breast and tumors across this region, namely for ACAT1, ATM, and other genes. In silico analysis revealed some overlap between top risk-associated SNPs and relevant biological features in mammary cell data, which suggests potential functional significance. We identified 11q22.3 as a new modifier locus in BRCA1 carriers. Replication in larger studies using estrogen receptor (ER)-negative or triple-negative (i.e., ER-, progesterone receptor-, and HER2-negative) cases could therefore be helpful to confirm the association of this locus with breast cancer risk.
Subject: Breast cancer
Genetic modifiers
Differential allelic expression
Genetic susceptibility
Cis-regulatory variants
BRCA1 and BRCA2 mutation carriers
OVARIAN-CANCER
CYCLIN E-CDK2
HUMAN-CELLS
DISEASE
NPAT
INVESTIGATORS
CONSORTIUM
DNA
3123 Gynaecology and paediatrics
3122 Cancers
3111 Biomedicine
1184 Genetics, developmental biology, physiology
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