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Friebel TM, Andrulis IL, Balmana J, Blanco AM, Couch FJ, Daly MB, Domchek SM, Easton DF, Foulkes WD, Ganz PA, Garber J, Glendon G, Greene MH, Hulick PJ, Isaacs C, Jankowitz RC, Karlan BY, Kirk J, Kwong A, Lee A, Lesueur F, Lu KH, Nathanson KL, Neuhausen SL, Offit K, Palmero EI, Sharma P, Tischkowitz M, Toland AE, Tung N, van Rensburg EJ, Vega A, Weitzel JN, Hoskins KF, Maga T, Parsons MT, McGuffog L, Antoniou AC, Chenevix-Trench G, Huo D, Olopade OI, Rebbeck TR
BRCA1 and BRCA2 Pathogenic Sequence Variants in Women of African Origin or Ancestry
Hum Mutat (2019) 40:1781-1796.
BRCA1 and BRCA2 (BRCA1/2) pathogenic sequence variants (PSV) confer elevated risks of multiple cancers. However, most BRCA1/2 PSVs reports focus on European ancestry individuals. Knowledge of the PSV distribution in African descent individuals is poorly understood. We undertook a systematic review of the published literature and publicly available databases reporting BRCA1/2 PSVs also accessed the Consortium of Investigators of Modifiers of BRCA1/2 (CIMBA) database to identify African or African descent individuals. Using these data, we inferred which of the BRCA PSVs were likely to be of African continental origin. Of the 43,817 BRCA1/2 PSV carriers in the CIMBA database, 469 (1%) were of African descent. Additional African descent individuals were identified in public databases (n=291) and the literature (n=601). We identified 164 unique BRCA1 and 173 unique BRCA2 PSVs in individuals of African ancestry. Of these, 83 BRCA1 and 91 BRCA2 PSVs are of likely or possible African origin. We observed numerous differences in the distribution of PSV type and function in African origin vs. non-African origin PSVs. Research in populations of African ancestry with BRCA1/2 PSVs is needed to provide information needed for clinical management and decision-making in African descent individuals worldwide. This article is protected by copyright. All rights reserved.
Publication Date: 2019-10-01.
PMCID: PMC6764847
Last updated on Monday, May 04, 2020