Related Experiment Video
Updated: Jun 2, 2026
06:22
Modeling and Evaluation of Murine Diabetic Cardiomyopathy Model
Published on: November 29, 2024
High fat diet induced diabetic cardiomyopathy
Ellen Dirkx1, Robert W Schwenk, Jan F C Glatz
1Department of Molecular Genetics, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands. ellen.dirkx@gen.unimaas.nl
Summary
High levels of fatty acids (FAs) force the heart to use FAs instead of glucose, leading to insulin resistance and diabetic cardiomyopathy. This metabolic shift damages heart function and structure.
Area of Science:
- Cardiovascular Biology
- Metabolic Diseases
- Molecular Cardiology
Background:
- Chronic high plasma long-chain fatty acids (FAs) alter cardiac substrate utilization, favoring FA uptake over glucose.
- This metabolic shift is associated with increased FA transporter CD36 expression and leads to cardiac insulin resistance and diabetic cardiomyopathy.
Purpose of the Study:
- To review the lipid-induced changes linking metabolic perturbations in type 2 diabetes with cardiac remodeling and dysfunction.
- To elucidate the role of fatty acids, peroxisome proliferator-activated receptors (PPARs), and reactive oxygen species (ROS) in the development of diabetic cardiomyopathy.
Main Methods:
- Literature review focusing on the molecular and cellular mechanisms of lipid-induced cardiac dysfunction.
- Analysis of signaling pathways affected by lipid intermediates like diacylglycerols (DAG) and ceramide.
Main Results:
- Increased FA uptake and utilization by the heart, driven by CD36 and PPARs, leads to lipid overload.
- Lipid overload increases reactive oxygen species (ROS) production and accumulation of diacylglycerols (DAG) and ceramide, impairing insulin signaling.
- Metabolic changes result in structural alterations affecting cardiac contractile function.
Conclusions:
- Metabolic perturbations characteristic of type 2 diabetes, particularly lipid accumulation, are key drivers of cardiac remodeling and dysfunction.
- Understanding these lipid-induced pathways is crucial for developing therapeutic strategies against diabetic cardiomyopathy.
Related Concept Videos
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
01:30Cardiomyopathy II: Dilated Cardiomyopathy
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
01:25Cardiomyopathy I: Introduction and Classification
Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
01:24Type II Diabetes II: Pathophysiology
PathophysiologyType 2 diabetes mellitus (T2DM ) is a chronic metabolic disorder characterized by insulin resistance and progressive pancreatic β-cell dysfunction, leading to impaired glucose homeostasis. It results from interactions among genetic predisposition, environmental factors, and metabolic stressors, such as overnutrition and a sedentary lifestyle.Insulin Resistance and Glucose DysregulationEarly T2DM involves insulin resistance in skeletal muscle, adipose tissue, and the liver.
01:28Diabetic Nephropathy
Definition Diabetic nephropathy is a chronic kidney complication that results from prolonged hyperglycemia.Prevalence It is the most common cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) worldwide, affecting up to half of individuals with diabetes.Pathophysiology • Sustained hyperglycemia triggers multiple hemodynamic and metabolic changes in the kidney. • Early in the disease, increased renal blood flow and glomerular hyperfiltration occur due to afferent arteriolar...
01:29Heart Failure II: Pathophysiology
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...