Ambient fine particle (PM) is one of the potential risk factors for the cardiovascular disease, which is characterized by a marked shift in energy substrate preference leading to the reduction of adenosine triphosphate (ATP) synthesis. The metabolic adaptation is brought about by alterations in substrate transporters. Hence, this study aimed to investigate the effects and possible mechanisms of seasonal PM exposure on alteration of cardiac ATP content. Sprague Dawley (SD) rats were exposed to summer and winter PM for two months to generate a cardiac damage phenotype, characterized by apoptosis, lipid peroxidation, and ATP depletion. Reduced fatty acid content and elevated glucose content were observed in haze dose PM-exposed SD rats and rat cardiomyocyte cells. Expressions of their transporters in PM-treated groups exhibited the homologous trends. Moreover, PM exposure repressed the expression and translocation of peroxisome proliferator-activated receptor alpha (PPARα) in a dose-dependent manner. However, the addition of WY-14643 (an inhibitor of PPARα) prominently alleviated the above phenomenons. The effect of PM in winter was found to be more serious than in summer. These results demonstrated that seasonal PM exposure causes the abnormality of cardiac ATP generation through the regulation of PPARα-mediated selection and utilization of energy substrates and their transporters. This study contributes in better understanding of haze-induced cardiovascular disease by revealing crucial indicators involved in this phenomenon.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/j.envpol.2019.02.083 | DOI Listing |
Int J Cardiol Cardiovasc Risk Prev
March 2025
Beijing Chaoyang Hospital, Capital Medical University, Department of Endocrinology, Beijing, China.
Object: To explore the mechanism of diabetic cardiomyopathy that hyperglycemia may affect the cardiac function by inhibiting the expression of ATPase β subunit.
Method: Cardiac function, fibrosis levels, and the expression of the ATPase β subunit were observed in Akita mice-a diabetes mice model without lipid metabolism disorders--using morphological, molecular biology, and echocardiographic analyses compared to wild-type mice. The study revealed a connection between the decreased ATPase β subunit and the development of diabetic myocardial injury.
Introduction: The infarcted heart is energetically compromised exhibiting a deficient production of adenosine triphosphate (ATP) and the ensuing impaired contractile function. Short-term blockade of the protein S100A9 improves cardiac performance in mice after myocardial infarction (MI). The implications upon ATP production during this process are not known.
View Article and Find Full Text PDFHeliyon
January 2025
Unit of Medical Genetics, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy.
Sudden cardiac death (SCD) is a major health concern, which can be the sign of a latent mitochondrial disease. However, mitochondrial DNA (mtDNA) contribution is largely unexplored in SCD at population level. Recently, mtDNA variants have been associated with congenital cardiopathy and higher risk of ischemic heart disease, suggesting them as potential risk factors also in SCD.
View Article and Find Full Text PDFStroke
January 2025
Department of Experimental Neurology, Center for Stroke Research Berlin (CSB), Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (M.F., S.B., S.M., K.W., M.E., A.M., U.D., C.S.).
Background: Contrary to the common belief, the most commonly used laboratory C57BL/6J mouse inbred strain presents a distinctive genetic and phenotypic variability, and for several traits, the genotype-phenotype link remains still unknown. Recently, we characterized the most important stroke survival factor such as brain collateral plasticity in 2 brain ischemia C57BL/6J mouse models (bilateral common carotid artery stenosis and middle cerebral artery occlusion) and observed a Mendelian-like fashion of inheritance of the posterior communicating artery (PcomA) patency. Interestingly, a copy number variant (CNV) spanning locus was reported to segregate in an analogous Mendelian-like pattern in the C57BL/6J colonies of the Jackson Laboratory.
View Article and Find Full Text PDFMol Nutr Food Res
January 2025
Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Cardiovascular diseases (CVDs) are the leading cause of death globally. Decrease in female sex hormones during menopause increases the risk of cardiovascular disease, mainly ischemic heart disease (IHD). Quercetin, a flavonoid, has beneficial properties in CVDs due to its antioxidant, anti-inflammatory, and anti-apoptotic effects.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!