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BMP4 is Required in the Anterior Heart Field and Its Derivatives for Endocardial Cushion Remodeling, Outflow Tract Septation, and Semilunar Valve Development

Overview
Journal Dev Dyn
Publisher Wiley
Date 2008 Oct 17
PMID 18924235
Citations 90
Authors
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Abstract

The endocardial cushions play a critical role in septation of the four-chambered mammalian heart and in the formation of the valve leaflets that control blood flow through the heart. Within the outflow tract (OFT), both cardiac neural crest and endocardial-derived mesenchymal cells contribute to the endocardial cushions. Bone morphogenetic protein 4 (BMP4) is required for endocardial cushion development and for normal septation of the OFT. In the present study, we show that anterior heart field (AHF)-derived myocardium is an essential source of BMP4 required for normal endocardial cushion expansion and remodeling. Loss of BMP4 from the AHF in mice results in an insufficient number of cells in the developing OFT endocardial cushions, defective cushion remodeling, ventricular septal defects, persistent truncus arteriosus, and abnormal semilunar valve formation.

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