Key result
Cardiac lipotoxicity drives diabetic cardiomyopathy progression through lipid overload, mitochondrial dysfunction, and oxidative stress.
Why the study?
Diabetic cardiomyopathy is an important contributor to heart failure in diabetes, with cardiac lipotoxicity acting as a key driver of disease onset and progression.
This review consolidates evidence that targeting maladaptive lipid handling and organelle stress could yield new therapeutic strategies for diabetic cardiomyopathy.
May inform targeting of lipid overload in diabetic cardiomyopathy; confirms mechanisms but leaves clinical efficacy open.
Diabetic cardiomyopathy (DbCM) is an important contributor to heart failure (HF) in diabetes, occurring independently of other cardiovascular risk factors. Accumulating evidence demonstrates that cardiac lipotoxicity is a key driver of the onset and progression of DbCM and HF. Myocardial lipid homeostasis is coordinated by multiple transcriptional regulations, signaling pathway activation, and endoplasmic reticulum-mediated management involved in lipid metabolism. In DbCM, unbalanced fatty acid (FA) influx, handling, storage, and utilization initiates lipid overload, accumulation of toxic lipid intermediates (e.g., diacylglycerols and ceramides), and activation of maladaptive response. Notably, these lipid intermediates amplify reactive oxygen species (ROS) generation, which serves as a critical link between lipotoxic signaling and mitochondrial dysfunction by promoting electron leak, mitochondrial damage, and activation of inflammatory and cell-death pathways. These processes converge on adverse remodeling and contractile impairment, accelerating DbCM progression. This review integrates mechanistic and translational evidence linking dysregulated lipid handling to DbCM and discusses the potential therapeutic strategies that target lipid abnormalities.
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Han et al. (2026) conducted a review in Diabetic cardiomyopathy. Cardiac lipotoxicity was evaluated. Cardiac lipotoxicity is a key driver of the onset and progression of diabetic cardiomyopathy by promoting lipid overload, mitochondrial dysfunction, and oxidative stress.
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