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    Hereditary breast and ovarian cancer syndrome (HBOC) is an inherited disorder with an increased risk of breast cancer (BC) and ovarian cancers (OC). Mutations in BRCA1-BRCA2 explains less than a half of cases. In the last decade several genes with different penetrance have been associated with an increased risk of BC or OC. A recurrent heterozygous ERCC3 truncating mutation increases the risk for breast cancer in patients with Ashkenazi Jewish ancestry. Our study aimed to investigate the role of ERCC3 truncating variants in a cohort of patients with suspicion of HBOC. ERCC3 screening by multigene-panel analysis in 1311 unrelated patients after our regional consensus for genetic testing in hereditary cancer was done. In addition, 453 Spanish cancer-free individuals and 51,343 GnomAD non-Finnish, non-cancer European individuals were used as control populations. We identified 13 patients with heterozygous ERCC3 truncating variants (0.99%). Five of them also carried a mutation in a high- /moderate-penetrance HBOC gene (BRCA1, BRCA2, CHEK2, and TP53) being Multilocus Inherited Neoplasia Alleles syndrome (MINAS) patients. The frequency in 453 Spanish controls was of 0.22%; similar to that observed in 51,343 non-Finnish European GnomAD population (0.24%). We found an almost statistically significant association of truncating ERCC3 variants with BC (odds ratio [OR] = 2.25, confidence interval [CI] = 0.6-5.93, P = 0.11), and we observed for the first time a significant association with OC (OR = 4.74, CI = 1-14.34, P = 0.028), that holds even after removing MINAS cases. To our knowledge, this is the largest HBOC series comprehensively analysed for ERCC3 mutations, and the first study identifying ERCC3 as a cancer risk for OC. Copyright © 2020 Elsevier Ltd. All rights reserved.

    Citation

    Agostina Stradella, Jesús Del Valle, Paula Rofes, Gardenia Vargas-Parra, Mónica Salinas, Sara González, Eva Montes, Adriana López-Doriga, Carolina Gómez, Rafael de Cid, Esther Darder, Alex Teulé, Ares Solanes, Elisabet Munté, Gabriel Capellà, Marta Pineda, Lidia Feliubadaló, Joan Brunet, Conxi Lázaro. ERCC3, a new ovarian cancer susceptibility gene? European journal of cancer (Oxford, England : 1990). 2020 Dec;141:1-8

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    PMID: 33125943

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