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The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
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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...
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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,...
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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

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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...
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Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
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Related Experiment Video

Updated: Oct 19, 2025

Induction of Right Ventricular Failure by Pulmonary Artery Constriction and Evaluation of Right Ventricular Function in Mice
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Cardiac PANK1 deletion exacerbates ventricular dysfunction during pressure overload.

Timothy N Audam1, Caitlin M Howard1, Lauren F Garrett1

  • 1Diabetes and Obesity Center, Department of Medicine, University of Louisville, Louisville, Kentucky.

American Journal of Physiology. Heart and Circulatory Physiology
|September 17, 2021
PubMed
Summary
This summary is machine-generated.

Limiting coenzyme A (CoA) levels by deleting pantothenate kinase 1 (PANK1) in heart cells worsened cardiac remodeling during pressure overload, highlighting CoA

Keywords:
CoA metabolismPank1fibrosisheart failurepantothenate kinase 1

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Area of Science:

  • Cardiovascular Biology
  • Metabolic Regulation
  • Cardiac Pathophysiology

Background:

  • Coenzyme A (CoA) is crucial for metabolism, but its role in cardiac remodeling under stress is unclear.
  • Perturbations in CoA homeostasis are linked to pathologies, yet its impact on ventricular function during pressure overload remains unexplored.

Purpose of the Study:

  • To investigate changes in the CoA biosynthetic pathway during pressure overload.
  • To determine the effect of limiting cardiac CoA levels on ventricular function and remodeling.

Main Methods:

  • Generated cardiomyocyte-specific Pank1 knockout mice (cmPank1) to reduce cardiac CoA levels.
  • Induced pressure overload-induced heart failure via transverse aortic constriction.
  • Utilized transcriptomic profiling and untargeted metabolomics to analyze molecular changes.

Main Results:

  • Pank1 deletion reduced PANK1 and CoA levels without baseline cardiac dysfunction.
  • cmPank1 mice exhibited exacerbated ventricular dilation and cardiac fibrosis post-pressure overload.
  • Metabolomic analysis revealed significant alterations in fatty acid and ketone metabolism.

Conclusions:

  • Elevated CoA levels support fatty acid and ketone body oxidation in the stressed heart.
  • Metabolic alterations, not structural changes, driven by Pank1 deletion underlie exacerbated cardiac remodeling during pressure overload.
  • This study highlights the critical role of CoA homeostasis in maintaining cardiac function under metabolic stress.