| Literature DB >> 15691764 |
M Albert Basson1, Simge Akbulut, Judy Watson-Johnson, Ruth Simon, Thomas J Carroll, Reena Shakya, Isabelle Gross, Gail R Martin, Thomas Lufkin, Andrew P McMahon, Patricia D Wilson, Frank D Costantini, Ivor J Mason, Jonathan D Licht.
Abstract
Intercellular signaling molecules and their receptors, whose expression must be tightly regulated in time and space, coordinate organogenesis. Regulators of intracellular signaling pathways provide an additional level of control. Here we report that loss of the receptor tyrosine kinase (RTK) antagonist, Sprouty1 (Spry1), causes defects in kidney development in mice. Spry1(-/-) embryos have supernumerary ureteric buds, resulting in the development of multiple ureters and multiplex kidneys. These defects are due to increased sensitivity of the Wolffian duct to GDNF/RET signaling, and reducing Gdnf gene dosage correspondingly rescues the Spry1 null phenotype. We conclude that the function of Spry1 is to modulate GDNF/RET signaling in the Wolffian duct, ensuring that kidney induction is restricted to a single site. These results demonstrate the importance of negative feedback regulation of RTK signaling during kidney induction and suggest that failures in feedback control may underlie some human congenital kidney malformations.Entities:
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Year: 2005 PMID： 15691764 DOI： 10.1016/j.devcel.2004.12.004
Source DB: PubMed Journal: Dev Cell ISSN： 1534-5807 Impact factor: 12.270