The predictive ability of the 313 variant-based polygenic risk score for contralateral breast cancer risk prediction in women of European ancestry with a heterozygous BRCA1 or BRCA2 pathogenic variant

Inge M M Lakeman, Alexandra J van den Broek, Juliën A M Vos, Daniel R Barnes, Julian Adlard, Irene L Andrulis, Adalgeir Arason, Norbert Arnold, Banu K Arun, Judith Balmaña, Daniel Barrowdale, Javier Benitez, Ake Borg, Trinidad Caldés, Maria A Caligo, Wendy K Chung, Kathleen B M Claes, J Margriet Collée, Fergus J Couch, Mary B DalyJoe Dennis, Mallika Dhawan, Susan M Domchek, Ros Eeles, Christoph Engel, D Gareth Evans, Lidia Feliubadaló, Lenka Foretova, Eitan Friedman, Debra Frost, Patricia A Ganz, Judy Garber, Simon A Gayther, Anne-Marie Gerdes, Andrew K Godwin, David E Goldgar, Eric Hahnen, Christopher R Hake, Ute Hamann, Frans B L Hogervorst, Maartje J Hooning, John L Hopper, Peter J Hulick, Evgeny N Imyanitov, Claudine Isaacs, Louise Izatt, Anna Jakubowska, Paul A James, Ramunas Janavicius, Uffe Birk Jensen, GEMO Study Collaborators

18 Citationer (Scopus)

Abstract

PURPOSE: To evaluate the association between a previously published 313 variant-based breast cancer (BC) polygenic risk score (PRS313) and contralateral breast cancer (CBC) risk, in BRCA1 and BRCA2 pathogenic variant heterozygotes.

METHODS: We included women of European ancestry with a prevalent first primary invasive BC (BRCA1 = 6,591 with 1,402 prevalent CBC cases; BRCA2 = 4,208 with 647 prevalent CBC cases) from the Consortium of Investigators of Modifiers of BRCA1/2 (CIMBA), a large international retrospective series. Cox regression analysis was performed to assess the association between overall and ER-specific PRS313 and CBC risk.

RESULTS: For BRCA1 heterozygotes the estrogen receptor (ER)-negative PRS313 showed the largest association with CBC risk, hazard ratio (HR) per SD = 1.12, 95% confidence interval (CI) (1.06-1.18), C-index = 0.53; for BRCA2 heterozygotes, this was the ER-positive PRS313, HR = 1.15, 95% CI (1.07-1.25), C-index = 0.57. Adjusting for family history, age at diagnosis, treatment, or pathological characteristics for the first BC did not change association effect sizes. For women developing first BC < age 40 years, the cumulative PRS313 5th and 95th percentile 10-year CBC risks were 22% and 32% for BRCA1 and 13% and 23% for BRCA2 heterozygotes, respectively.

CONCLUSION: The PRS313 can be used to refine individual CBC risks for BRCA1/2 heterozygotes of European ancestry, however the PRS313 needs to be considered in the context of a multifactorial risk model to evaluate whether it might influence clinical decision-making.

OriginalsprogEngelsk
TidsskriftGenetics in medicine : official journal of the American College of Medical Genetics
Vol/bind23
Udgave nummer9
Sider (fra-til)1726-1737
Antal sider12
ISSN1098-3600
DOI
StatusUdgivet - sep. 2021

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