ZFIN ID: ZDB-PUB-010912-9
UDP-glucose dehydrogenase required for cardiac valve formation in zebrafish
Walsh, E.C. and Stainier, D.Y.
Date: 2001
Source: Science (New York, N.Y.) 293(5535): 1670-1673 (Journal)
Registered Authors: Stainier, Didier, Walsh, Emily
Keywords: endocardial cushion formation, TGF-beta receptor, cell-transformation, neuregulin receptor, heart, gene, biosynthesis, Drosophila, morphogenesis, proteoglycans
MeSH Terms: Amino Acid Sequence; Animals; Antisense Elements (Genetics); Body Patterning; Bone Morphogenetic Proteins/genetics (all 28) expand
PubMed: 11533493 Full text @ Science
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ABSTRACT
Cardiac valve formation is a complex process that involves cell signaling events between the myocardial and endocardial layers of the heart across an elaborate extracellular matrix. These signals lead to marked morphogenetic movements and transdifferentiation of the endocardial cells at chamber boundaries. Here we identify the genetic defect in zebrafish jekyll mutants, which are deficient in the initiation of heart valve formation. The jekyll mutation disrupts a homolog of Drosophila Sugarless, a uridine 5'-diphosphate (UDP)-glucose dehydrogenase required for heparan sulfate, chondroitin sulfate, and hyaluronic acid production. The atrioventricular border cells do not differentiate from their neighbors in jekyll mutants, suggesting that Jekyll is required in a cell signaling event that establishes a boundary between the atrium and ventricle.
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