TY - JOUR
T1 - Fine-Mapping of the 1p11.2 Breast Cancer Susceptibility Locus
AU - Horne, Hisani N
AU - Chung, Charles C
AU - Zhang, Han
AU - Yu, Kai
AU - Prokunina-Olsson, Ludmila
AU - Michailidou, Kyriaki
AU - Bolla, Manjeet K
AU - Wang, Qin
AU - Dennis, Joe
AU - Hopper, John L
AU - Southey, Melissa C
AU - Schmidt, Marjanka K
AU - Broeks, Annegien
AU - Muir, Kenneth
AU - Lophatananon, Artitaya
AU - Fasching, Peter A
AU - Beckmann, Matthias W
AU - Fletcher, Olivia
AU - Johnson, Nichola
AU - Sawyer, Elinor J
AU - Tomlinson, Ian
AU - Burwinkel, Barbara
AU - Marme, Frederik
AU - Guénel, Pascal
AU - Truong, Thérèse
AU - Bojesen, Stig E
AU - Flyger, Henrik
AU - Benitez, Javier
AU - González-Neira, Anna
AU - Anton-Culver, Hoda
AU - Neuhausen, Susan L
AU - Brenner, Hermann
AU - Arndt, Volker
AU - Meindl, Alfons
AU - Schmutzler, Rita K
AU - Brauch, Hiltrud
AU - Hamann, Ute
AU - Nevanlinna, Heli
AU - Khan, Sofia
AU - Matsuo, Keitaro
AU - Iwata, Hiroji
AU - Dörk, Thilo
AU - Bogdanova, Natalia V
AU - Lindblom, Annika
AU - Margolin, Sara
AU - Mannermaa, Arto
AU - Kosma, Veli-Matti
AU - Chenevix-Trench, Georgia
AU - Wu, Anna H
AU - Lu, Wei
AU - kConFab/AOCS Investigators
PY - 2016/8/24
Y1 - 2016/8/24
N2 - The Cancer Genetic Markers of Susceptibility genome-wide association study (GWAS) originally identified a single nucleotide polymorphism (SNP) rs11249433 at 1p11.2 associated with breast cancer risk. To fine-map this locus, we genotyped 92 SNPs in a 900kb region (120,505,799-121,481,132) flanking rs11249433 in 45,276 breast cancer cases and 48,998 controls of European, Asian and African ancestry from 50 studies in the Breast Cancer Association Consortium. Genotyping was done using iCOGS, a custom-built array. Due to the complicated nature of the region on chr1p11.2: 120,300,000-120,505,798, that lies near the centromere and contains seven duplicated genomic segments, we restricted analyses to 429 SNPs excluding the duplicated regions (42 genotyped and 387 imputed). Per-allelic associations with breast cancer risk were estimated using logistic regression models adjusting for study and ancestry-specific principal components. The strongest association observed was with the original identified index SNP rs11249433 (minor allele frequency (MAF) 0.402; per-allele odds ratio (OR) = 1.10, 95% confidence interval (CI) 1.08-1.13, P = 1.49 x 10-21). The association for rs11249433 was limited to ER-positive breast cancers (test for heterogeneity P≤8.41 x 10-5). Additional analyses by other tumor characteristics showed stronger associations with moderately/well differentiated tumors and tumors of lobular histology. Although no significant eQTL associations were observed, in silico analyses showed that rs11249433 was located in a region that is likely a weak enhancer/promoter. Fine-mapping analysis of the 1p11.2 breast cancer susceptibility locus confirms this region to be limited to risk to cancers that are ER-positive.
AB - The Cancer Genetic Markers of Susceptibility genome-wide association study (GWAS) originally identified a single nucleotide polymorphism (SNP) rs11249433 at 1p11.2 associated with breast cancer risk. To fine-map this locus, we genotyped 92 SNPs in a 900kb region (120,505,799-121,481,132) flanking rs11249433 in 45,276 breast cancer cases and 48,998 controls of European, Asian and African ancestry from 50 studies in the Breast Cancer Association Consortium. Genotyping was done using iCOGS, a custom-built array. Due to the complicated nature of the region on chr1p11.2: 120,300,000-120,505,798, that lies near the centromere and contains seven duplicated genomic segments, we restricted analyses to 429 SNPs excluding the duplicated regions (42 genotyped and 387 imputed). Per-allelic associations with breast cancer risk were estimated using logistic regression models adjusting for study and ancestry-specific principal components. The strongest association observed was with the original identified index SNP rs11249433 (minor allele frequency (MAF) 0.402; per-allele odds ratio (OR) = 1.10, 95% confidence interval (CI) 1.08-1.13, P = 1.49 x 10-21). The association for rs11249433 was limited to ER-positive breast cancers (test for heterogeneity P≤8.41 x 10-5). Additional analyses by other tumor characteristics showed stronger associations with moderately/well differentiated tumors and tumors of lobular histology. Although no significant eQTL associations were observed, in silico analyses showed that rs11249433 was located in a region that is likely a weak enhancer/promoter. Fine-mapping analysis of the 1p11.2 breast cancer susceptibility locus confirms this region to be limited to risk to cancers that are ER-positive.
KW - Alleles
KW - Breast Neoplasms
KW - Case-Control Studies
KW - Chromosome Mapping
KW - Chromosomes, Human, Pair 1
KW - Computational Biology
KW - Female
KW - Gene Frequency
KW - Genetic Association Studies
KW - Genetic Predisposition to Disease
KW - Genotype
KW - Humans
KW - Linkage Disequilibrium
KW - Neoplasm Grading
KW - Polymorphism, Single Nucleotide
KW - Population Surveillance
KW - Quantitative Trait Loci
KW - Risk Assessment
KW - Journal Article
U2 - 10.1371/journal.pone.0160316
DO - 10.1371/journal.pone.0160316
M3 - Article
C2 - 27556229
SN - 1932-6203
VL - 11
SP - e0160316
JO - P L o S One
JF - P L o S One
IS - 8
ER -