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Published in: Breast Cancer Research 3/2009

Open Access 01-06-2009 | Research article

Gene expression in murine mammary epithelial stem cell-like cells shows similarities to human breast cancer gene expression

Authors: Cecilia Williams, Luisa Helguero, Karin Edvardsson, Lars-Arne Haldosén, Jan-Åke Gustafsson

Published in: Breast Cancer Research | Issue 3/2009

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Abstract

Introduction

Mammary stem cells are bipotential and suggested to be the origin of breast cancer development, but are elusive and vaguely characterized. Breast tumors can be divided into subgroups, each one requiring specific treatment. To determine a possible association between mammary stem cells and breast cancer, a detailed characterization of the transcriptome in mammary stem cells is essential.

Methods

We have used a murine mammary epithelial stem-like cell line (HC11) and made a thorough investigation of global gene-expression changes during stepwise differentiation using dual-color comparative microarray technique. Subsequently, we have performed a cross-species comparison to reveal conserved gene expression between stem cells and subtype-specific and prognosis gene signatures, and correlated gene expression to in vivo mammary gland development.

Results

Our analysis of mammary stem-like and stepwise cell differentiation, and an in-depth description of our findings in a breast cancer perspective provide a unique map of the transcriptomic changes and a number of novel mammary stem cell markers. We correlate the alterations to in vivo mammary gland differentiation, and describe novel changes in nuclear receptor gene expression. Interestingly, our comparisons show that specific subtypes of breast cancers with poor prognosis and metastasizing capabilities show resemblance to stem-like gene expression.

Conclusions

The transcriptional characterization of these mammary stem-like cells and their differentiation-induced gene expression patterns is here made widely accessible and provides a basis for research on mammary stem-like cells. Our comparisons suggest that some tumors are more stem-like than others, with a corresponding worse prognosis. This information would, if established, be important for treatment decisions. We also suggest several marker candidates valuable to investigate further.
Appendix
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Metadata
Title
Gene expression in murine mammary epithelial stem cell-like cells shows similarities to human breast cancer gene expression
Authors
Cecilia Williams
Luisa Helguero
Karin Edvardsson
Lars-Arne Haldosén
Jan-Åke Gustafsson
Publication date
01-06-2009
Publisher
BioMed Central
Published in
Breast Cancer Research / Issue 3/2009
Electronic ISSN: 1465-542X
DOI
https://doi.org/10.1186/bcr2256

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