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- W2011057859 abstract "Jun is a highly conserved member of the multimeric activator protein 1 transcription factor complex and plays an important role in human cancer where it is known to be critical for proliferation, cell cycle regulation, differentiation, and cell death. All of these biological functions are also crucial for embryonic development. Although all Jun null mouse embryos die at mid-gestation with persistent truncus arteriosus, a severe cardiac outflow tract defect also seen in human congenital heart disease, the developmental mechanisms are poorly understood. Here we show that murine Jun is expressed in a restricted pattern in several cell populations important for cardiovascular development, including the second heart field, pharyngeal endoderm, outflow tract and atrioventricular endocardial cushions and post-migratory neural crest derivatives. Several genes, including Isl1, molecularly mark the second heart field. Isl1 lineages include myocardium, smooth muscle, neural crest, endocardium, and endothelium. We demonstrate that conditional knockout mouse embryos lacking Jun in Isl1-expressing progenitors display ventricular septal defects, double outlet right ventricle, semilunar valve hyperplasia and aortic arch artery patterning defects. In contrast, we show that conditional deletion of Jun in Tie2-expressing endothelial and endocardial precursors does not result in aortic arch artery patterning defects or embryonic death, but does result in ventricular septal defects and a low incidence of semilunar valve defects, atrioventricular valve defects and double outlet right ventricle. Our results demonstrate that Jun is required in Isl1-expressing progenitors and, to a lesser extent, in endothelial cells and endothelial-derived endocardium for cardiovascular development but is dispensable in both cell types for embryonic survival. These data provide a cellular framework for understanding the role of Jun in the pathogenesis of congenital heart disease." @default.
- W2011057859 created "2016-06-24" @default.
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- W2011057859 date "2013-02-21" @default.
- W2011057859 modified "2023-10-17" @default.
- W2011057859 title "Jun Is Required in Isl1-Expressing Progenitor Cells for Cardiovascular Development" @default.
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- W2011057859 doi "https://doi.org/10.1371/journal.pone.0057032" @default.
- W2011057859 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3578783" @default.
- W2011057859 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23437302" @default.
- W2011057859 hasPublicationYear "2013" @default.