Cecatto 2018 J Cell Biochem
|Cecatto C, Wajner A, Vargas CR, Wajner SM, Amaral AU, Wajner M (2018) High vulnerability of the heart and liver to 3-hydroxypalmitic acid-induced disruption of mitochondrial functions in intact cell systems. J Cell Biochem 119:7678-86.|
Abstract: Patients affected by long-chain 3-hydroxyacyl-CoA dehydrogenase (LCHAD) deficiency predominantly present severe liver and cardiac dysfunction, as well as neurological symptoms during metabolic crises, whose pathogenesis is still poorly known. In this study, we demonstrate for the first time that pathological concentrations of 3-hydroxypalmitic acid (3HPA), the long-chain hydroxyl fatty acid (LCHFA) that most accumulates in LCHAD deficiency, significantly decreased adenosine triphosphate-linked and uncoupled mitochondrial respiration in intact cell systems consisting of heart fibers, cardiomyocytes, and hepatocytes, but less intense in diced forebrain. 3HPA also significantly reduced mitochondrial Ca2+ retention capacity and membrane potential in Ca2+ -loaded mitochondria more markedly in the heart and the liver, with mild or no effects in the brain, supporting a higher susceptibility of the heart and the liver to the toxic effects of this fatty acid. It is postulated that disruption of mitochondrial energy and Ca2+ homeostasis caused by the accumulation of LCHFA may contribute toward the severe cardiac and hepatic clinical manifestations observed in the affected patients.
• Keywords: 3-hydroxypalmitic acid, Energy and Ca2+ homeostasis, Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency • Bioblast editor: Plangger M, Kandolf G • O2k-Network Lab: BR Porto Alegre Souza DOG
Labels: MiParea: Respiration, Pharmacology;toxicology Pathology: Other
Organism: Rat Tissue;cell: Heart, Nervous system, Liver Preparation: Permeabilized cells, Permeabilized tissue
Regulation: Calcium Coupling state: LEAK, OXPHOS, ET Pathway: N HRR: Oxygraph-2k