Evaluating Genome-Wide Association Study-Identified Breast Cancer Risk Variants in African-American Women

被引:66
作者
Long, Jirong [1 ]
Zhang, Ben [1 ]
Signorello, Lisa B. [1 ,2 ]
Cai, Qiuyin [1 ]
Deming-Halverson, Sandra [1 ]
Shrubsole, Martha J. [1 ]
Sanderson, Maureen [3 ]
Dennis, Joe [4 ]
Michailiou, Kyriaki [4 ]
Easton, Douglas F. [4 ,5 ]
Shu, Xiao-Ou [1 ]
Blot, William J. [1 ,2 ]
Zheng, Wei [1 ]
机构
[1] Vanderbilt Univ, Sch Med, Vanderbilt Ingram Canc Ctr, Vanderbilt Epidemiol Ctr,Dept Med,Div Epidemiol, Nashville, TN 37212 USA
[2] Int Epidemiol Inst, Rockville, MD USA
[3] Meharry Med Coll, Nashville, TN 37208 USA
[4] Univ Cambridge, Dept Publ Hlth & Primary Care, Ctr Canc Genet Epidemiol, Cambridge, England
[5] Univ Cambridge, Dept Oncol, Ctr Canc Genet Epidemiol, Cambridge, England
基金
美国国家卫生研究院;
关键词
SUSCEPTIBILITY LOCI; COMMON VARIANTS; CONFER SUSCEPTIBILITY; GENETIC-VARIANTS; CHROMOSOME; 5P12; FGFR2; HEALTH; ADMIXTURE; ALLELES;
D O I
10.1371/journal.pone.0058350
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Genome-wide association studies (GWAS), conducted mostly in European or Asian descendants, have identified approximately 67 genetic susceptibility loci for breast cancer. Given the large differences in genetic architecture between the African-ancestry genome and genomes of Asians and Europeans, it is important to investigate these loci in African-ancestry populations. We evaluated index SNPs in all 67 breast cancer susceptibility loci identified to date in our study including up to 3,300 African-American women (1,231 cases and 2,069 controls), recruited in the Southern Community Cohort Study (SCCS) and the Nashville Breast Health Study (NBHS). Seven SNPs were statistically significant (P <= 0.05) with the risk of overall breast cancer in the same direction as previously reported: rs10069690 (5p15/TERT), rs999737 (14q24/RAD51L1), rs13387042 (2q35/TNP1), rs1219648 (10q26/FGFR2), rs8170 (19p13/BABAM1), rs17817449 (16q12/FTO), and rs13329835 (16q23/DYL2). A marginally significant association (P<0.10) was found for three additional SNPs: rs1045485 (2q33/CASP8), rs4849887 (2q14/INHBB), and rs4808801 (19p13/ELL). Three additional SNPs, including rs1011970 (9p21/CDKN2A/2B), rs941764 (14q32/CCDC88C), and rs17529111 (6q14/FAM46A), showed a significant association in analyses conducted by breast cancer subtype. The risk of breast cancer was elevated with an increasing number of risk variants, as measured by quintile of the genetic risk score, from 1.00 (reference), to 1.75 (1.30-2.37), 1.56 (1.15-2.11), 2.02 (1.50-2.74) and 2.63 (1.96-3.52), respectively, (P = 7.8 x 10(-10)). Results from this study highlight the need for large genetic studies in AAs to identify risk variants impacting this population.
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