BRCA2 suppresses replication stress-induced mitotic and G1 abnormalities through homologous recombination.
BRCA2 suppresses replication stress-induced mitotic and G1 abnormalities through homologous recombination.
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DOI:
10.1038/s41467-017-00634-0
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发表时间:
2017-09-13
影响因子:
16.6
通讯作者:
Jasin M
中科院分区:
文献类型:
--
作者:
Feng W;Jasin M
Mutations in the tumor suppressor BRCA2 predominantly predispose to breast cancer. Paradoxically, while loss of BRCA2 promotes tumor formation, it also causes cell lethality, although how lethality is triggered is unclear. Here, we generate BRCA2 conditional non-transformed human mammary epithelial cell lines using CRISPR-Cas9. Cells are inviable upon BRCA2 loss, which leads to replication stress associated with under replication, causing mitotic abnormalities, 53BP1 nuclear body formation in the ensuing G1 phase, and G1 arrest. Unexpected from other systems, the role of BRCA2 in homologous recombination, but not in stalled replication fork protection, is primarily associated with supporting human mammary epithelial cell viability, and, moreover, preventing replication stress, a hallmark of pre-cancerous lesions. Thus, we uncover a DNA under replication-53BP1 nuclear body formation-G1 arrest axis as an unanticipated outcome of homologous recombination deficiency, which triggers cell lethality and, we propose, serves as a barrier that must be overcome for tumor formation. BRCA2 mutations promote tumour formation while also paradoxically causing cell lethality. Here the authors generate conditional BRCA2 loss in a non-transformed human mammary cell line and see increased replication stress due to under-replication of DNA.
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影响因子:
16.8
作者:
通讯作者:
--
DOI:
10.1056/nejmra0809889
发表时间:
2010-05-20
期刊:
The New England journal of medicine
影响因子:
--
作者:
D'Andrea AD
通讯作者:
D'Andrea AD
影响因子:
64.8
作者:
Ray Chaudhuri A;Callen E;Ding X;Gogola E;Duarte AA;Lee JE;Wong N;Lafarga V;Calvo JA;Panzarino NJ;John S;Day A;Crespo AV;Shen B;Starnes LM;de Ruiter JR;Daniel JA;Konstantinopoulos PA;Cortez D;Cantor SB;Fernandez-Capetillo O;Ge K;Jonkers J;Rottenberg S;Sharan SK;Nussenzweig A
通讯作者:
Nussenzweig A
影响因子:
8.8
作者:
Bétous R;Couch FB;Mason AC;Eichman BF;Manosas M;Cortez D
通讯作者:
Cortez D
影响因子:
11.8
作者:
Choi, Eunhee;Park, Pil-Gu;Lee, Hyunsook
通讯作者:
Lee, Hyunsook