| Popis: |
SUMMARYThe developing mammalian heart undergoes an important metabolic shift from glycolysis toward mitochondrial oxidation, such that oxidative phosphorylation defects may present with cardiac abnormalities. Here, we describe a new mechanistic link between mitochondria and cardiac morphogenesis, uncovered by studying mice with systemic loss of the mitochondrial citrate carrier SLC25A1.Slc25a1null embryos displayed impaired growth, cardiac malformations, and aberrant mitochondrial function. Importantly,Slc25a1haploinsufficient embryos, which are overtly indistinguishable from wild type, exhibited an increased frequency of these defects, suggestingSlc25a1dose-dependent effects. Supporting clinical relevance, we found a near-significant association between ultrarare human pathogenicSLC25A1variants and pediatric congenital heart disease. Mechanistically, SLC25A1 may link mitochondria to transcriptional regulation of metabolism through epigenetic control of PPARγ to promote metabolic remodeling in the developing heart. Collectively, this work positions SLC25A1 as a novel mitochondrial regulator of ventricular morphogenesis and cardiac metabolic maturation and suggests a role in congenital heart disease. |
