Abstract：
:Pathways that govern stem cell (SC) function are often subverted in cancer. Here, we report the isolation to near purity of human normal mammary SCs (hNMSCs), from cultured mammospheres, on the basis of their ability to retain the lipophilic dye PKH26 as a consequence of their quiescent nature. PKH26-positive cells possess all the characteristics of hNMSCs. The transcriptional profile of PKH26-positive cells (hNMSC signature) was able to predict biological and molecular features of breast cancers. By using markers of the hNMSC signature, we prospectively isolated SCs from the normal gland and from breast tumors. Poorly differentiated (G3) cancers displayed higher content of prospectively isolated cancer SCs (CSCs) than did well-differentiated (G1) cancers. By comparing G3 and G1 tumors in xenotransplantation experiments, we directly demonstrated that G3s are enriched in CSCs. Our data support the notion that the heterogeneous phenotypical and molecular traits of human breast cancers are a function of their CSC content.
journal_name
Celljournal_title
Cellauthors
Pece S,Tosoni D,Confalonieri S,Mazzarol G,Vecchi M,Ronzoni S,Bernard L,Viale G,Pelicci PG,Di Fiore PPdoi
10.1016/j.cell.2009.12.007subject
Has Abstractpub_date
2010-01-08 00:00:00pages
62-73issue
1eissn
0092-8674issn
1097-4172pii
S0092-8674(09)01554-2journal_volume
140pub_type
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