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Development, Vol 112, Issue 3 855-861, Copyright © 1991 by Company of Biologists
JOURNAL ARTICLES |
H Nogawa and Y Takahashi
Biological Laboratory, College of Arts and Sciences, Chiba University, Japan.
Mouse salivary epithelium cannot undergo branching morphogenesis in the absence of the surrounding mesenchyme. To clarify the nature of the mesenchymal influence on the epithelium, we have investigated the culture conditions in which the epithelium could normally branch in the absence of mesenchymal cells. Combination of basement-membrane-like substratum (Matrigel) and epidermal growth factor (EGF) could substitute for the mesenchyme, the epithelium showing typical branching morphogenesis. Transforming growth factor alpha had the same effect as EGF. Matrigel plus basic fibroblast growth factor or transforming growth factor beta 1 and collagen gel plus EGF were not sufficient to support the branching of the epithelium. These results clearly reveal that the role of mesenchyme in salivary morphogenesis is both to provide the epithelium with an appropriate substratum and to accelerate growth of the epithelium.
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