Epigenetics and Heart Failure

Syeda Shegufta Ameer1, Mohammad Bakhtiar Hossain1,2, Ralph Knöll1,2

  • 1ICMC (Integrated Cardio Metabolic Centre), Myocardial Genetics, Karolinska Institutet, Novum, Hiss A, Våning 7, Hälsovägen 7-9, 141 57 Huddinge, Sweden.

Summary

Epigenetics, changes in gene expression without altering DNA sequence, plays a role in heart failure. DNA methylation modifications like 5-methylcytosine (5mC) and 5-hydroxymethylcytosine (5hmC) are key areas for developing new therapies.

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Pathophysiology of Heart Failure

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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Heart Failure I: Introduction01:27

Heart Failure I: Introduction

Heart failure refers to a clinical syndrome caused by structural or functional cardiac disorders that prevent the heart from pumping an adequate amount of blood to meet the body's metabolic needs. This condition often arises from myocardial infarction or ischemia, leading to decreased cardiac output, reduced tissue perfusion, impaired gas exchange, fluid volume imbalance, and decreased functional ability.Heart failure can result from disruptions in the mechanisms that regulate cardiac output...
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Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

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Human Genetics01:28

Human Genetics

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Heart Failure IV: Classification and Diagnostic Evaluation01:30

Heart Failure IV: Classification and Diagnostic Evaluation

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Epigenetic Regulation01:37

Epigenetic Regulation

Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
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