Genome-wide association studies identify susceptibility loci for epithelial ovarian cancer in east Asian women.
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Abstract
OBJECTIVE:Genome-wide association studies (GWASs) for epithelial ovarian cancer (EOC) have focused largely on populations of European ancestry. We aimed to identify common germline variants associated with EOC risk in Asian women. METHODS:Genotyping was performed as part of the OncoArray project. Samples with >60% Asian ancestry were included in the analysis. Genotyping was performed on 533,631 SNPs in 3238 Asian subjects diagnosed with invasive or borderline EOC and 4083 unaffected controls. After imputation, genotypes were available for 11,595,112 SNPs to identify associations. RESULTS:At chromosome 6p25.2, SNP rs7748275 was associated with risk of serous EOC (odds ratio [OR] = 1.34, P = 8.7 × 10-9) and high-grade serous EOC (HGSOC) (OR = 1.34, P = 4.3 × 10-9). SNP rs6902488 at 6p25.2 (r2 = 0.97 with rs7748275) lies in an active enhancer and is predicted to impact binding of STAT3, P300 and ELF1. We identified additional risk loci with low Bayesian false discovery probability (BFDP) scores, indicating they are likely to be true risk associations (BFDP <10%). At chromosome 20q11.22, rs74272064 was associated with HGSOC risk (OR = 1.27, P = 9.0 × 10-8). Overall EOC risk was associated with rs10260419 at chromosome 7p21.3 (OR = 1.33, P = 1.2 × 10-7) and rs74917072 at chromosome 2q37.3 (OR = 1.25, P = 4.7 × 10-7). At 2q37.3, expression quantitative trait locus analysis in 404 HGSOC tissues identified ESPNL as a putative candidate susceptibility gene (P = 1.2 × 10-7). CONCLUSION:While some risk loci were shared between East Asian and European populations, others were population-specific, indicating that the landscape of EOC risk in Asian women has both shared and unique features compared to women of European ancestry.
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Lawrenson, Kate, Fengju Song, Dennis J Hazelett, Siddhartha P Kar, Jonathan Tyrer, Catherine M Phelan, Rosario I Corona, Norma I Rodríguez-Malavé, et al. (2019). Genome-wide association studies identify susceptibility loci for epithelial ovarian cancer in east Asian women. Gynecologic oncology, 153(2). pp. 343–355. 10.1016/j.ygyno.2019.02.023 Retrieved from https://hdl.handle.net/10161/18519.
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Qingyi Wei
Qingyi Wei, MD, PhD, Professor in the Department of Medicine, is Associate Director for Cancer Control and Population Sciences, Co-leader of CCPS and Co-leader of Epidemiology and Population Genomics (Focus Area 1). He is a professor of Medicine and an internationally recognized epidemiologist focused on the molecular and genetic epidemiology of head and neck cancers, lung cancer, and melanoma. His research focuses on biomarkers and genetic determinants for the DNA repair deficient phenotype and variations in cell death. He is Editor-in-Chief of the open access journal "Cancer Medicine" and Associate Editor-in-Chief of the International Journal of Molecular Epidemiology and Genetics.
Area of Expertise: Epidemiology
Andrew Berchuck
Dr. Andrew Berchuck is Director of the Duke Division of Gynecologic Oncology and holds the James M. Ingram Distinguished Professorship. He is a practicing oncologist who is actively involved in the surgical and chemotherapy management of women with ovarian, endometrial and lower genital tract cancers. This includes minimally invasive laparoscopic surgical approaches. He also has developed a research program that focuses on the molecular-genetic alterations involved in malignant transformation of the ovarian and endometrial epithelium. He has published over 300 peer-reviewed papers in these areas. The objectives of his research include 1) identification of ovarian cancer susceptibility polymorphisms through a population-based case-control molecular epidemiologic study, and 2) use of genomic approaches to elucidate the molecular heterogenetity of ovarian cancer. Thirty fellows and residents have worked in his lab, several of whom are now funded investigators. His research efforts have been recognized nationally and he has received awards for best oral presentation at the annual meetings of both the Society of Gynecologic Oncology and the International Gynecologic Cancer Society. Dr. Berchuck was awarded the Barbara Thomason Ovarian Cancer Research Professorship by the American Cancer Society in 2006. He has served as editor of several books in the field including Principles and Practice of Gynecologic Oncology. Dr. Berchuck also has a major commitment to national activities, and was President of the Society of Gynecologic Oncology in 2008. He served as chair of the scientific advisory committee of the Ovarian Cancer Research Fund (http://www.ocrf.org) in New York City. Finally, he is also head of the steering committee of the international Ovarian Cancer Association Consortium (OCAC), a group of 50 case-control studies that are working together to identify ovarian cancer susceptibility polymorphisms (www.srl.cam.ac.uk/consortia/ocac/index.html).
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