A genetic mechanism for cecal atresia: the role of the Fgf10 signaling pathway

The Journal of Surgical Research
T J FairbanksR C Burns

Abstract

Intestinal atresia represents a significant surgically correctable cause of intestinal obstruction in neonates. Intestinal development proceeds as a tube-like structure with differentiation along its axis. As the intestine differentiates, the cecum develops at the transition from small to large intestine. Fgf10 is known to serve a key role in budding morphogenesis; however, little is known about its role in the development of this transitional structure. Here we evaluate the effect of Fgf10/Fgfr2b invalidation on the developing cecum. Wild-type C57Bl/6, Fgf10(-/-), and Fgfr2b(-/-) embryos harvested from timed pregnant mothers were analyzed for cecal phenotype, Fgf10 expression, and differentiation of smooth muscle actin. Wt cecal development is first evident at E11.5. FGF10 is discreetly expressed in the area of the developing cecum at early stages of development. One hundred percent of Fgf10(-/-) and Fgfr2b(-/-) mutant embryos demonstrate cecal atresia with absence of epithelial and muscular layers. The development of neighboring anatomical structures such as the ileocecal valve is not affected by Fgf10/Fgfr2b invalidation. FGF10 expression is localized to the cecum early in the normal development of the cecum. Fgf10(-/-) and ...Continue Reading

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Citations

Dec 1, 2010·Journal of Gastrointestinal Surgery : Official Journal of the Society for Surgery of the Alimentary Tract·Peter F NicholRobert Botham
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