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2017 ; 10
(9
): 1101-1108
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Pdgfr? functions in endothelial-derived cells to regulate neural crest cells and
the development of the great arteries
#MMPMID28714851
Aghajanian H
; Cho YK
; Rizer NW
; Wang Q
; Li L
; Degenhardt K
; Jain R
Dis Model Mech
2017[Sep]; 10
(9
): 1101-1108
PMID28714851
show ga
Originating as a single vessel emerging from the embryonic heart, the truncus
arteriosus must septate and remodel into the aorta and pulmonary artery to
support postnatal life. Defective remodeling or septation leads to abnormalities
collectively known as conotruncal defects, which are associated with significant
mortality and morbidity. Multiple populations of cells must interact to
coordinate outflow tract remodeling, and the cardiac neural crest has emerged as
particularly important during this process. Abnormalities in the cardiac neural
crest have been implicated in the pathogenesis of multiple conotruncal defects,
including persistent truncus arteriosus, double outlet right ventricle and
tetralogy of Fallot. However, the role of the neural crest in the pathogenesis of
another conotruncal abnormality, transposition of the great arteries, is less
well understood. In this report, we demonstrate an unexpected role of Pdgfra in
endothelial cells and their derivatives during outflow tract development. Loss of
Pdgfra in endothelium and endothelial-derived cells results in double outlet
right ventricle and transposition of the great arteries. Our data suggest that
loss of Pdgfra in endothelial-derived mesenchyme in the outflow tract endocardial
cushions leads to a secondary defect in neural crest migration during
development.