Unraveling the Mechanisms of S100A8/A9 in Myocardial Injury and Dysfunction

Area of Science:

• Biochemistry
• Molecular Biology
• Cardiology

Background:

• S100A8 and S100A9 form the S100A8/A9 heterodimer (calprotectin), a calcium-binding protein complex.
• S100A8/A9 is increasingly recognized as a potential biomarker for cardiovascular diseases (CVDs).
• Its multifaceted mechanisms influencing myocardial injury and dysfunction are under intense investigation.

Purpose of the Study:

• To comprehensively review the intricate mechanisms of S100A8/A9 in cardiovascular diseases.
• To elucidate the dualistic role of S100A8/A9 in inflammation and its impact on cardiac health.
• To explore S100A8/A9's involvement in mitochondrial dysfunction, fibrosis, apoptosis, and autophagy in CVDs.

Main Methods:

• Literature review of existing research on S100A8/A9 and cardiovascular diseases.
• Analysis of studies detailing the molecular and cellular functions of S100A8/A9.
• Synthesis of information regarding S100A8/A9's role in inflammatory pathways and cardiac pathophysiology.

Main Results:

• S100A8/A9 exhibits a dual role in inflammation, acting as both an inflammatory mediator and an anti-inflammatory agent.
• The protein complex is implicated in initiating mitochondrial dysfunction within cardiomyocytes.
• S100A8/A9 demonstrates dual modulation of myocardial fibrosis progression, apoptosis, and autophagy.

Conclusions:

• S100A8/A9's complex functions in CVDs warrant further investigation for clinical applications.
• Understanding S100A8/A9's mechanisms can lead to novel diagnostic strategies for cardiovascular diseases.
• Targeting S100A8/A9 pathways may offer future therapeutic interventions for myocardial injury and dysfunction.