| Literature DB >> 22069192 |
Jie Dong1, Shixia Huang, Marian Caikovski, Shaoquan Ji, Amanda McGrath, Myra G Custorio, Chad J Creighton, Paul Maliakkal, Ekaterina Bogoslovskaia, Zhijun Du, Xiaomei Zhang, Michael T Lewis, Fred Sablitzky, Cathrin Brisken, Yi Li.
Abstract
The ID family of helix-loop-helix proteins regulates cell proliferation and differentiation in many different developmental pathways, but the functions of ID4 in mammary development are unknown. We report that mouse Id4 is expressed in cap cells, basal cells and in a subset of luminal epithelial cells, and that its targeted deletion impairs ductal expansion and branching morphogenesis as well as cell proliferation induced by estrogen and/or progesterone. We discover that p38MAPK is activated in Id4-null mammary cells. p38MAPK is also activated following siRNA-mediated Id4 knockdown in transformed mammary cells. This p38MAPK activation is required for the reduced proliferation and increased apoptosis in Id4-ablated mammary glands. Therefore, ID4 promotes mammary gland development by suppressing p38MAPK activity.Entities:
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Year: 2011 PMID: 22069192 PMCID: PMC3210500 DOI: 10.1242/dev.069203
Source DB: PubMed Journal: Development ISSN: 0950-1991 Impact factor: 6.868