Homologous repair deficiency score for identifying breast cancers with defective DNA damage response.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
27 07 2020
27 07 2020
Historique:
received:
29
01
2020
accepted:
09
06
2020
entrez:
29
7
2020
pubmed:
29
7
2020
medline:
15
12
2020
Statut:
epublish
Résumé
Breast cancer (BC) in patients with germline mutations of BRCA1/BRCA2 are associated with benefit from drugs targeting DNA damage response (DDR), but they account for only 5-7% of overall breast cancer. To define the characteristics of these tumors and also to identify tumors without BRCA mutation but with homologous recombination deficiency (HRD) is clinically relevant. To define characteristic features of HRD tumors and analyze the correlations between BRCA1/BRCA2 and BC subtypes, we analyzed 981 breast tumors from the TCGA database using the signature analyzer. The BRCA signature was strongly associated with the HRD score top 10% (score ≥ 57) population. This population showed a high level of mutations in DDR genes, including BRCA1/BRCA2. HRD tumors were associated with high expression levels of BARD1 and BRIP1. Besides, BRCA1/2 mutations were dominantly observed in basal and luminal subtypes, respectively. A comparison of HRD features in BC revealed that BRCA1 exerts a stronger influence inducing HRD features than BRCA2 does. It reveals genetic differences between BRCA1 and BRCA2 and provides a basis for the identification of HRD and other BRCA-associated tumors.
Identifiants
pubmed: 32719318
doi: 10.1038/s41598-020-68176-y
pii: 10.1038/s41598-020-68176-y
pmc: PMC7385153
doi:
Substances chimiques
BRCA1 Protein
0
BRCA1 protein, human
0
BRCA2 Protein
0
BRCA2 protein, human
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
12506Références
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