Prediction of breast cancer risk based on common genetic variants in women of East Asian ancestry

Wanqing Wen, Xiao-Ou Shu, Xingyi Guo, Qiuyin Cai, Jirong Long, Manjeet K Bolla, Kyriaki Michailidou, Joe Dennis, Qin Wang, Yu-Tang Gao, Ying Zheng, Alison M Dunning, Montserrat García-Closas, Paul Brennan, Shou-Tung Chen, Ji-Yeob Choi, Mikael Hartman, Hidemi Ito, Artitaya Lophatananon, Keitaro MatsuoHui Miao, Kenneth Muir, Suleeporn Sangrajrang, Chen-Yang Shen, Soo H Teo, Chiu-Chen Tseng, Anna H Wu, Cheng Har Yip, Jacques Simard, Paul D P Pharoah, Per Hall, Daehee Kang, Yongbing Xiang, Douglas F Easton, Wei Zheng

Research output: Contribution to journalArticlepeer-review

Abstract

BACKGROUND: Approximately 100 common breast cancer susceptibility alleles have been identified in genome-wide association studies (GWAS). The utility of these variants in breast cancer risk prediction models has not been evaluated adequately in women of Asian ancestry.

METHODS: We evaluated 88 breast cancer risk variants that were identified previously by GWAS in 11,760 cases and 11,612 controls of Asian ancestry. SNPs confirmed to be associated with breast cancer risk in Asian women were used to construct a polygenic risk score (PRS). The relative and absolute risks of breast cancer by the PRS percentiles were estimated based on the PRS distribution, and were used to stratify women into different levels of breast cancer risk.

RESULTS: We confirmed significant associations with breast cancer risk for SNPs in 44 of the 78 previously reported loci at P < 0.05. Compared with women in the middle quintile of the PRS, women in the top 1% group had a 2.70-fold elevated risk of breast cancer (95% CI: 2.15-3.40). The risk prediction model with the PRS had an area under the receiver operating characteristic curve of 0.606. The lifetime risk of breast cancer for Shanghai Chinese women in the lowest and highest 1% of the PRS was 1.35% and 10.06%, respectively.

CONCLUSION: Approximately one-half of GWAS-identified breast cancer risk variants can be directly replicated in East Asian women. Collectively, common genetic variants are important predictors for breast cancer risk. Using common genetic variants for breast cancer could help identify women at high risk of breast cancer.

Original languageEnglish
Pages (from-to)124
JournalBreast Cancer Research
Volume18
Issue number1
DOIs
Publication statusPublished - 8 Dec 2016

Keywords

  • Algorithms
  • Asia
  • Asian Continental Ancestry Group
  • Breast Neoplasms
  • Case-Control Studies
  • Female
  • Genetic Association Studies
  • Genetic Predisposition to Disease
  • Genetic Variation
  • Genome-Wide Association Study
  • Humans
  • Models, Statistical
  • Odds Ratio
  • Population Surveillance
  • Risk Assessment
  • Risk Factors
  • Journal Article
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

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