BRCA1 basal-like breast cancers originate from luminal epithelial progenitors and not from basal stem cells - PubMed (original) (raw)
. 2010 Sep 3;7(3):403-17.
doi: 10.1016/j.stem.2010.07.010.
Felipe C Geyer, Fiona-Ann Magnay, Afshan McCarthy, Howard Kendrick, Rachael Natrajan, Alan Mackay, Anita Grigoriadis, Andrew Tutt, Alan Ashworth, Jorge S Reis-Filho, Matthew J Smalley
Affiliations
- PMID: 20804975
- DOI: 10.1016/j.stem.2010.07.010
Free article
BRCA1 basal-like breast cancers originate from luminal epithelial progenitors and not from basal stem cells
Gemma Molyneux et al. Cell Stem Cell. 2010.
Free article
Abstract
Breast cancers in BRCA1 mutation carriers frequently have a distinctive basal-like phenotype. It has been suggested that this results from an origin in basal breast epithelial stem cells. Here, we demonstrate that deleting Brca1 in mouse mammary epithelial luminal progenitors produces tumors that phenocopy human BRCA1 breast cancers. They also resemble the majority of sporadic basal-like breast tumors. However, directing Brca1 deficiency to basal cells generates tumors that express molecular markers of basal breast cancers but do not histologically resemble either human BRCA1 or the majority of sporadic basal-like breast tumors. These findings support a derivation of the majority of human BRCA1-associated and sporadic basal-like tumors from luminal progenitors rather than from basal stem cells. They also demonstrate that when target cells for transformation have the potential for phenotypic plasticity, tumor phenotypes may not directly reflect histogenesis. This has important implications for cancer prevention strategies.
Copyright 2010 Elsevier Inc. All rights reserved.
Comment in
- Cancer cell of origin: spotlight on luminal progenitors.
Chaffer CL, Weinberg RA. Chaffer CL, et al. Cell Stem Cell. 2010 Sep 3;7(3):271-2. doi: 10.1016/j.stem.2010.08.008. Cell Stem Cell. 2010. PMID: 20804960 Free PMC article.
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