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The mammary gland “side population”: a putative stem/progenitor cell marker?

Smalley, Matthew John ORCID: and Clarke, Robert B. 2005. The mammary gland “side population”: a putative stem/progenitor cell marker? Journal of Mammary Gland Biology and Neoplasia 10 (1) , pp. 37-47. 10.1007/s10911-005-2539-0

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Hematopoietic Stem Cells have been isolated by their ability to pump out Hoechst 33342 dye and form a distinct population definable by flow cytometry—the Side Population (SP). The membrane pump Bcrp has been identified as the molecular determinant of the SP phenotype. An SP population with Bcrp activity has been defined in a number of tissues, including mouse mammary and human breast epithelium, and it has been proposed that the SP phenotype is a universal stem cell marker. Studies of mouse and human breast SP suggest that the population is undifferentiated but capable of differentiating into epithelial structures of both luminal and myoepithelial lineages both in vitro and in vivo. However, evidence that the SP is enriched for stem cells is, at the moment, only correlative, and there are potentially confounding technical issues. We still await formal proof that the SP contains a stem cell population.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
European Cancer Stem Cell Research Institute (ECSCRI)
Publisher: Springer
ISSN: 1083-3021
Last Modified: 27 Oct 2022 08:49

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