Scientific Publications

Genetic predisposition directs breast cancer phenotype by dictating progenitor cell fate.

Publication TypeJournal Article
AuthorsProia, TA, Keller PJ, Gupta PB, Klebba I., Jones AD, Sedic M., Gilmore H., Tung N., Naber SP, Schnitt S., Lander E. S., and Kuperwasser C.
AbstractWomen with inherited mutations in the BRCA1 gene have increased risk of developing breast cancer but also exhibit a predisposition for the development of aggressive basal-like breast tumors. We report here that breast epithelial cells derived from patients harboring deleterious mutations in BRCA1 (BRCA1(mut /+) give rise to tumors with increased basal differentiation relative to cells from BRCA1+/+ patients. Molecular analysis of disease-free breast tissues from BRCA1(mut /+) patients revealed defects in progenitor cell lineage commitment even before cancer incidence. Moreover, we discovered that the transcriptional repressor Slug is an important functional suppressor of human breast progenitor cell lineage commitment and differentiation and that it is aberrantly expressed in BRCA1(mut /+) tissues. Slug expression is necessary for increased basal-like phenotypes prior to and after neoplastic transformation. These findings demonstrate that the genetic background of patient populations, in addition to affecting incidence rates, significantly impacts progenitor cell fate commitment and, therefore, tumor phenotype.
Year of Publication2011
JournalCell stem cell
Volume8
Issue2
Pages149-63
Date Published (YYYY/MM/DD)2011/02/04
ISSN Number1934-5909
DOI10.1016/j.stem.2010.12.007
PubMedhttp://www.ncbi.nlm.nih.gov/pubmed/21295272?dopt=Abstract