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Viral Infection and Connexin Dysfunction in the Heart
Chelsea M Phillips1, James W Smyth2,3,4,5,6
1Fralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, VA, 24016, USA.
Current Cardiology Reports
|March 27, 2025
Summary
Viral infections disrupt cardiac gap junctions through inflammation and direct viral targeting. Understanding these connexin alterations is key for developing new treatments for acute viral heart infections distinct from myocarditis.
Area of Science:
- Cardiology
- Virology
- Molecular Biology
Background:
- Gap junctions, formed by connexin proteins, are crucial for cardiomyocyte electrical and metabolic coupling.
- Disruption of cardiac gap junctions can lead to arrhythmias and impacts antiviral immune responses.
- Connexins are increasingly recognized as targets for viruses during infection.
Purpose of the Study:
- To review the roles of inflammation and virally encoded factors in altering cardiac gap junction function.
- To differentiate the mechanisms of cardiac dysfunction in acute viral infection versus chronic myocarditis.
Main Methods:
- Literature review of current research on viral infections and cardiac gap junctions.
- Analysis of studies investigating connexin alterations due to host immune responses and viral proteins.
Main Results:
- Both host immune responses (inflammation) and virally encoded factors directly target connexin function in the heart.
- Diverse viral species have evolved mechanisms to directly interfere with connexin function.
- Acute viral infections have distinct effects on cardiac gap junctions compared to chronic myocarditis.
Conclusions:
- Understanding the dual impact of inflammation and viral factors on cardiac gap junctions is critical.
- This knowledge is essential for developing targeted therapeutics for acute viral cardiac infections.
- Distinguishing acute viral infection from chronic myocarditis is vital for effective treatment strategies.
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