Suya Wang1, Weiliang Huang2, Hozana A Castillo3, Maureen A Kane2, José Xavier-Neto4, Paul A Trainor5,6, Alexander R Moise1,7. 1. Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, Kansas. 2. Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland. 3. Brazilian Biosciences National Laboratory, LNBio, Rua Giuseppe Máximo Scolfaro, Polo II de Alta Tecnologia de Campinas, Campinas, SP, Brazil. 4. Conselho Nacional do Desenvolvimnto Científico e Tecnológico (Cnpq) CEP 01414000 Cerqueira Cesar Sao Paulo, Sao Paulo, Brazil. 5. Stowers Institute for Medical Research, Kansas City, Missouri. 6. Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, Kansas. 7. Northern Ontario School of Medicine, Biomolecular Sciences Program and Department of Chemistry and Biochemistry, Laurentian University, Sudbury, Ontario, Canada.
Abstract
BACKGROUND: During the final stages of heart development the myocardium grows and becomes vascularized by means of paracrine factors and cell progenitors derived from the epicardium. There is evidence to suggest that retinoic acid (RA), a metabolite of vitamin A, plays an important role in epicardial-based developmental programming. However, the consequences of altered RA-signaling in coronary development have not been systematically investigated. RESULTS: We explored the developmental consequences of altered RA-signaling in late cardiogenic events that involve the epicardium. For this, we used a model of embryonic RA excess based on mouse embryos deficient in the retinaldehyde reductase DHRS3, and a complementary model of embryonic RA deficiency based on pharmacological inhibition of RA synthesis. We found that alterations in embryonic RA signaling led to a thin myocardium and aberrant coronary vessel formation and remodeling. Both excess, and deficient RA-signaling are associated with reductions in ventricular coverage and density of coronary vessels, altered vessel morphology, and impaired recruitment of epicardial-derived mural cells. Using a combined transcriptome and proteome profiling approach, we found that RA treatment of epicardial cells influenced key signaling pathways relevant for cardiac development. CONCLUSIONS: Epicardial RA-signaling plays critical roles in the development of the coronary vasculature needed to support myocardial growth. Developmental Dynamics 247:976-991, 2018.
BACKGROUND: During the final stages of heart development the myocardium grows and becomes vascularized by means of paracrine factors and cell progenitors derived from the epicardium. There is evidence to suggest that retinoic acid (RA), a metabolite of vitamin A, plays an important role in epicardial-based developmental programming. However, the consequences of altered RA-signaling in coronary development have not been systematically investigated. RESULTS: We explored the developmental consequences of altered RA-signaling in late cardiogenic events that involve the epicardium. For this, we used a model of embryonic RA excess based on mouse embryos deficient in the retinaldehyde reductase DHRS3, and a complementary model of embryonic RA deficiency based on pharmacological inhibition of RA synthesis. We found that alterations in embryonic RA signaling led to a thin myocardium and aberrant coronary vessel formation and remodeling. Both excess, and deficient RA-signaling are associated with reductions in ventricular coverage and density of coronary vessels, altered vessel morphology, and impaired recruitment of epicardial-derived mural cells. Using a combined transcriptome and proteome profiling approach, we found that RA treatment of epicardial cells influenced key signaling pathways relevant for cardiac development. CONCLUSIONS: Epicardial RA-signaling plays critical roles in the development of the coronary vasculature needed to support myocardial growth. Developmental Dynamics 247:976-991, 2018.
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