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Role of mitochondrial ribosomal protein L7/L12 (MRPL12) in diabetic ischemic heart disease. | LitMetric

Role of mitochondrial ribosomal protein L7/L12 (MRPL12) in diabetic ischemic heart disease.

Free Radic Biol Med

Aging + Cardiovascular Discovery Center, Department of Cardiovascular Sciences, Lewis Katz School of Medicine, Temple University, Philadelphia, USA; Department of Emergency Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA. Electronic address:

Published: September 2024

AI Article Synopsis

Article Abstract

Background: Myocardial infarction (MI) is a significant cause of death in diabetic patients. Growing evidence suggests that mitochondrial dysfunction contributes to heart failure in diabetes. However, the molecular mechanisms of mitochondrial dysfunction mediating heart failure in diabetes are still poorly understood.

Methods: We examined MRPL12 levels in right atrial appendage tissues from diabetic patients undergoing coronary artery bypass graft (CABG) surgery. Using AC-16 cells overexpressing MRPL12 under normal and hyperglycemic conditions we performed mitochondrial functional assays OXPHOS, bioenergetics, mitochondrial membrane potential, ATP production and cell death.

Results: We observed elevated MRPL12 levels in heart tissue samples from diabetic patients with ischemic heart disease compared to non-diabetic patients. Overexpression of MRPL12 under hyperglycemic conditions did not affect oxidative phosphorylation (OXPHOS) levels, cellular ATP levels, or cardiomyocyte cell death. However, notable impairment in mitochondrial membrane potential (MMP) was observed under hyperglycemic conditions, along with alterations in both basal respiration oxygen consumption rate (OCR) and maximal respiratory capacity OCR.

Conclusions: Overall, our results suggest that MRPL12 may have a compensatory role in the diabetic myocardium with ischemic heart disease, suggesting that MRPL12 may implicate in the pathophysiology of MI in diabetes.

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Source
http://dx.doi.org/10.1016/j.freeradbiomed.2024.07.003DOI Listing

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