Effect of Natural Cytokine Complex on the Structure and Metabolism of the Cardiac Conduction System in the Myocardium under Normally and Increased Hemodynamic Load

Area of Science:

• Cardiology
• Cell Biology
• Immunology

Background:

• Cytokines, particularly pro-inflammatory ones, play a role in cardiovascular health.
• The cardiac conduction system is crucial for maintaining normal heart rhythm.
• Acute hemodynamic load, such as aortic stenosis, can stress the heart.

Purpose of the Study:

• To investigate the effects of a natural cytokine complex on cardiac conduction cardiomyocytes.
• To assess these effects under normal conditions and during acute experimental aortic stenosis.

Main Methods:

• Systemic administration of a natural cytokine complex containing IL-1, IL-2, IL-6, TNF, MIF, and GTFβ.
• Assessment of structural and metabolic changes in conduction cardiomyocytes.
• Comparison between control groups and groups with experimental aortic stenosis.

Main Results:

• Cytokine complex administration induced structural abnormalities in conduction cardiomyocytes, more pronounced in the left ventricle and interventricular septum.
• Aortic stenosis exacerbated these morphological changes, affecting a significant number of cells.
• The cytokine complex inhibited key metabolic processes, including glycolysis, the citric acid cycle, and fatty acid oxidation, in conduction cardiomyocytes.

Conclusions:

• Elevated cytokine levels, especially pro-inflammatory ones, can disrupt the structure and metabolism of the cardiac conduction system.
• These disturbances are amplified under conditions of increased hemodynamic load.
• Such cytokine-induced changes may contribute to the development of cardiac arrhythmias.