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Article: The tumor suppressor gene Brca1 is required for embryonic cellular proliferation in the mouse

TitleThe tumor suppressor gene Brca1 is required for embryonic cellular proliferation in the mouse
Authors
Issue Date1996
Citation
Cell, 1996, v. 85, n. 7, p. 1009-1023 How to Cite?
AbstractMutations of the BRCA1 gene in humans are associated with predisposition to breast and ovarian cancers. We show here that Brca1(+/-) mice are normal and fertile and lack tumors by ago eleven months. Homozygous Brca15-6 mutant mice die before day 7.5 of embryogenesis. Mutant embryos are poorly developed, with no evidence of mesoderm formation. The extraembryonic region is abnormal, but aggregation with wild-type tetraploid embryos does not rescue the lethality. In vivo, mutant embryos do not exhibit increased apoptosis but show reduced cell proliferation accompanied by decreased expression of cyclin E and mdm-2, a regulator of p53 activity. The expression of cyclin-dependent kinase inhibitor p21 is dramatically increased in the mutant embryos. Buttressing these in vivo observations is the fact that mutant blastocyst growth is grossly impaired in vitro. Thus, the death of Brca15-6 mutant embryos prior to gastrulation may be due to a failure of the proliferative burst required for the development of the different germ layers.
Persistent Identifierhttp://hdl.handle.net/10722/291700
ISSN
2023 Impact Factor: 45.5
2023 SCImago Journal Rankings: 24.342
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorHakem, Razqallah-
dc.contributor.authorDe La Pompa, José Luis-
dc.contributor.authorSirard, Christian-
dc.contributor.authorMo, Rong-
dc.contributor.authorWoo, Minna-
dc.contributor.authorHakem, Anne-
dc.contributor.authorWakeham, Andrew-
dc.contributor.authorPotter, Julia-
dc.contributor.authorReitmair, Armin-
dc.contributor.authorBillia, Filio-
dc.contributor.authorFirpo, Eduardo-
dc.contributor.authorHui, Chi Chung-
dc.contributor.authorRoberts, Jim-
dc.contributor.authorRossant, Janet-
dc.contributor.authorMak, Tak W.-
dc.date.accessioned2020-11-17T14:54:55Z-
dc.date.available2020-11-17T14:54:55Z-
dc.date.issued1996-
dc.identifier.citationCell, 1996, v. 85, n. 7, p. 1009-1023-
dc.identifier.issn0092-8674-
dc.identifier.urihttp://hdl.handle.net/10722/291700-
dc.description.abstractMutations of the BRCA1 gene in humans are associated with predisposition to breast and ovarian cancers. We show here that Brca1(+/-) mice are normal and fertile and lack tumors by ago eleven months. Homozygous Brca15-6 mutant mice die before day 7.5 of embryogenesis. Mutant embryos are poorly developed, with no evidence of mesoderm formation. The extraembryonic region is abnormal, but aggregation with wild-type tetraploid embryos does not rescue the lethality. In vivo, mutant embryos do not exhibit increased apoptosis but show reduced cell proliferation accompanied by decreased expression of cyclin E and mdm-2, a regulator of p53 activity. The expression of cyclin-dependent kinase inhibitor p21 is dramatically increased in the mutant embryos. Buttressing these in vivo observations is the fact that mutant blastocyst growth is grossly impaired in vitro. Thus, the death of Brca15-6 mutant embryos prior to gastrulation may be due to a failure of the proliferative burst required for the development of the different germ layers.-
dc.languageeng-
dc.relation.ispartofCell-
dc.titleThe tumor suppressor gene Brca1 is required for embryonic cellular proliferation in the mouse-
dc.typeArticle-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1016/S0092-8674(00)81302-1-
dc.identifier.pmid8674108-
dc.identifier.scopuseid_2-s2.0-15844371372-
dc.identifier.volume85-
dc.identifier.issue7-
dc.identifier.spage1009-
dc.identifier.epage1023-
dc.identifier.isiWOS:A1996UV48400008-
dc.identifier.issnl0092-8674-

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