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Comprehensive analysis of scRNA-seq and bulk RNA-seq reveals the non-cardiomyocytes heterogeneity and novel cell populations in dilated cardiomyopathy.
J Transl Med
January 2025
State Key Laboratory of Cardiovascular Diseases and Medical Innovation Center, School of Medicine, Shanghai East Hospital, Tongji University, Shanghai, 200120, China.
Background: Dilated cardiomyopathy (DCM) is one of the most common causes of heart failure. Infiltration and alterations in non-cardiomyocytes of the human heart involve crucially in the occurrence of DCM and associated immunotherapeutic approaches.
Methods: We constructed a single-cell transcriptional atlas of DCM and normal patients.
Loss of PKM2 dysregulates inflammatory signaling in the infarcted murine heart.
Physiol Rep
January 2025
Department of Medicine, John A. Burns School of Medicine, University of Hawaii Mānoa, Honolulu, Hawaii, USA.
Inflammation and a metabolic shift from oxidative metabolism to glycolysis are common in the ischemic heart, the latter partly controlled by pyruvate kinase (muscle, PKM). We previously identified alternative splicing promoting the PKM2 isoform after myocardial infarction (MI). We examined the role of PKM2 physiological upregulation after MI, modeled by ligation of the left anterior descending coronary artery, using global PKM2 knockout (PKM2) mice.
View Article and Find Full Text PDFDrp1-Dependent Mitochondrial Fission Contributes to Lactic Acid-Induced Chicken Cardiomyocyte Damage.
J Biochem Mol Toxicol
January 2025
College of Animal Science and Technology, Henan Institute of Science and Technology, Xinxiang, China.
Enhanced glycolysis and elevated lactic acid (LA) production are observed during sudden death syndrome (SDS) in broilers. However, the mechanism underlying LA-induced cardiomyocyte damage and heart failure in fast-growing broilers remains unclear. In this study, chicken embryo cardiomyocytes (CECs) were cultured and treated with LA to investigate LA-induced CEC injury and its mechanism, aiming to develop strategies to prevent LA-induced SDS in broilers.
View Article and Find Full Text PDFProteomic and metabolomic analyses of the human adult myocardium reveal ventricle-specific regulation in end-stage cardiomyopathies.
Commun Biol
December 2024
Precision Cardiovascular Laboratory, The University of Sydney, Sydney, NSW, Australia.
Article Synopsis
- * A study was conducted using mass spectrometry to analyze the differences in metabolome (metabolism) and proteome (proteins) between healthy left and right ventricles, revealing significant metabolic changes.
- * In advanced heart conditions like dilated and ischemic cardiomyopathy, the distinct metabolic pathways between the ventricles become less pronounced, but the left ventricle shows more adverse changes related to heart failure.
NRF2 activation in the heart induces glucose metabolic reprogramming and reduces cardiac dysfunction via upregulation of the pentose phosphate pathway.
Cardiovasc Res
December 2024
School of Cardiovascular and Metabolic Medicine & Sciences, King's College London British Heart Foundation Centre of Excellence, London, UK.
Aims: The transcription factor NRF2 is well recognized as a master regulator of antioxidant responses and cytoprotective genes. Previous studies showed that NRF2 enhances resistance of mouse hearts to chronic hemodynamic overload at least in part by reducing oxidative stress. Evidence from other tissues suggests that NRF2 may modulate glucose intermediary metabolism but whether NRF2 has such effects in the heart is unclear.
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