Transcriptome analyses of mouse and human mammary cell subpopulations reveal multiple conserved genes and pathways
Open accessAbstract
INTRODUCTION: Molecular characterization of the normal epithelial cell types that reside in the mammary gland is an important step toward understanding pathways that regulate self-renewal, lineage commitment, and differentiation along the hierarchy. Here we determined the gene expression signatures of four distinct subpopulations isolated from the mouse mammary gland. The epithelial cell signatures were used to interrogate mouse models of mammary tumorigenesis and to compare with their normal human counterpart subsets to identify conserved genes and networks. METHODS: RNA was prepared from freshly sorted mouse mammary cell subpopulations (mammary stem cell (MaSC)-enriched, committed luminal progenitor, mature luminal and stromal cell) and used for gene expression profiling analysis on the Illumina platform. Gene signatures were derived and compared with those previously reported for the analogous normal human mammary cell subpopulations. The mouse and human epithelial subset signatures were then subjected to Ingenuity Pathway Analysis (IPA) to identify conserved pathways. RESULTS: The four mouse mammary cell subpopulations exhibited distinct gene signatures. Comparison of these signatures with the molecular profiles of different mouse models of mammary tumorigenesis revealed that tumors arising in MMTV-Wnt-1 and p53-/- mice were enriched for MaSC-subset genes, whereas the gene profiles of MMTV-Neu and MMTV-PyMT tumors were most concordant with the luminal progenitor cell signature. Comparison of the mouse mammary epithelial cell signatures with their human counterparts revealed substantial conservation of genes, whereas IPA highlighted a number of conserved pathways in the three epithelial subsets. CONCLUSIONS: The conservation of genes and pathways across species further validates the use of the mouse as a model to study mammary gland development and highlights pathways that are likely to govern cell-fate decisions and differentiation. It is noteworthy that many of the conserved genes in the MaSC population have been considered as epithelial-mesenchymal transition (EMT) signature genes. Therefore, the expression of these genes in tumor cells may reflect basal epithelial cell characteristics and not necessarily cells that have undergone an EMT. Comparative analyses of normal mouse epithelial subsets with murine tumor models have implicated distinct cell types in contributing to tumorigenesis in the different models.
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- Authors
- Lim, E., Wu, D., Pal, B., Bouras, T., Asselin-Labat, M.-L., Vaillant, F., Yagita, H., Lindeman, G. J., Smyth, G. K., & Visvader, J. E.
- Affiliations
- The University of Melbourne (AU)
- Walter and Eliza Hall Institute of Medical Research (AU)
- The Royal Melbourne Hospital (AU)
- Corresponding author
- Visvader, Jane E
- ORCID
- Venue
- Breast Cancer Research
- Published
- 2010-03-26
- Volume
- 12
- Issue
- 2
- Pages
- R21-R21
- ISSN
- 1465-5411 (ISSN-L)
- 1465-542X
- PMC
- PMC2879567
- OpenAlex
- W2160779973
- Cited by
- 440
- References
- 41
- Citations by year
- 2026: 7 · 2025: 16 · 2024: 33 · 2023: 16 · 2022: 29 · 2021: 41 · 2020: 26 · 2019: 33 · 2018: 22 · 2017: 25 · 2016: 31 · 2015: 35 · 2014: 33 · 2013: 26 · 2012: 24
- FWCI
- 14.72
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Breast Cancer Research (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Minerva Access (University of Melbourne) (submittedVersion, cc-by)
- Funders
- Victorian Cancer Agency
- Australian Cancer Research Foundation
- National Breast Cancer Foundation
- Medical Research Council
- Australian Research Council
- National Health and Medical Research Council
- Topics
- Health Sciences › Medicine › Oncology › Cancer Cells and Metastasis
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Breast Cancer Treatment Studies
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
- Keywords
- mammary epithelium, mammary stem cells, luminal progenitor cells, mammary carcinogenesis, MMTV-neu, MMTV-PyMT, p53-deficient mice, gene expression signatures, cross-species conservation, epithelial-mesenchymal transition, mammary gland development, cell fate determination, human-mouse comparison
- MeSH terms
- Animals, Humans, Mammary Glands, Animal, Signal Transduction, Mammary Neoplasms, Animal, Conserved Sequence, Reverse Transcriptase Polymerase Chain Reaction, Oligonucleotide Array Sequence Analysis, Gene Expression Profiling, Mammary Glands, Human, Mice
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