Neuregulin-3 regulates epithelial progenitor cell positioning and specifies mammary phenotype.
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ICR Authors
Authors
Kogata, N
Oliemuller, E
Wansbury, O
Howard, BA
Oliemuller, E
Wansbury, O
Howard, BA
Document Type
Journal Article
Date
2014-11-15
Date Accepted
2014-06-17
Abstract
Mutation of Neuregulin-3 (Nrg3) results in defective embryonic mammary gland development. Here, we investigate functions of Nrg3 signaling in embryonic mammary morphogenesis. Nrg3 regulates the distribution of epithelial progenitor cells within the presumptive mammary-forming region during early mammary morphogenesis. Basal and suprabasal epithelial cells are significantly smaller within the hypoplastic mammary primordium (MP) that forms in Nrg3 mutants, indicative of failure to acquire mammary epithelial cell (MEC) morphological phenotype. Activation of Erbb4 JM-a CYT-1, an Erbb4 isoform expressed in the developing MP, leads to MEC spreading and migration. Nrg3 promotes the accumulation of epithelial progenitor cells at the MP site in embryo explant cultures. Our results implicate Nrg3 signaling in mediating key events of mammary mesenchyme specification, including mesenchymal condensation, mitosis, and induction of mammary marker expression. Taken together, our results show Nrg3 has a major role in conferring specification of the mammary phenotype to both epithelial and mesenchymal progenitor cells.
Citation
STEM CELLS AND DEVELOPMENT, 2014, 23 (22), pp. 2758 - 2770 (13)
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Source Title
Publisher
MARY ANN LIEBERT, INC
ISSN
1547-3287
eISSN
1557-8534
Collections
Research Team
Endocrine control mechanisms