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Review
. 2013 Nov 25;2(6):e000433.
doi: 10.1161/JAHA.113.000433.

Taking diabetes to heart--deregulation of myocardial lipid metabolism in diabetic cardiomyopathy

Affiliations
Review

Taking diabetes to heart--deregulation of myocardial lipid metabolism in diabetic cardiomyopathy

Marina Bayeva et al. J Am Heart Assoc. .
No abstract available

Keywords: diabetes mellitus; diabetic cardiomyopathy; lipid toxicity; lipids and lipoprotein metabolism.

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Figures

Figure 1.
Figure 1.
Overview of myocardial fatty acid (FA) metabolism. FAs are imported into the cell by various FA transporters, including CD36, FA transport protein (FATP), and plasma membrane FA‐binding protein (FABPpm). Imported FAs may be stored as triglyceride (TAG) or converted to fatty acyl CoA by FA CoA synthase (FACS). The acyl group of fatty acid CoA can be transferred to carnitine via carnitine palmitoyltransferase (CPT) 1. The acylcarnitine is then shuttled into the mitochondria by carnitine translocase (CT), where it can undergo β‐oxidation, producing acetyl CoA, which can be used in the tricarboxylic acid (TCA) cycle to produce adenosine triphosphate (ATP).
Figure 2.
Figure 2.
Pathophysiology of type 1 (T1DM) and type 2 (T2DM) diabetes mellitus on energy metabolism in the heart. Both T1DM and T2DM lead to insulin receptor substrate 1 (IRS1) inhibition, peroxisome proliferator‐activated receptor α (PPARα) activation, and suppression of glycolysis, resulting in metabolic rigidity, reduced adenosine triphosphate (ATP) generation efficiency, and generation of toxic fatty acid (FA) intermediates. PDK4 indicates pyruvate dehydrogenase kinase 4.

References

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