Reciprocal Multifaceted Interaction Between HDL (High-Density Lipoprotein) and Myocardial Infarction

Area of Science:

• Cardiovascular Medicine
• Lipid Metabolism
• Biochemistry

Background:

• Myocardial infarction (MI) is a major global cause of mortality despite therapeutic advances.
• High-density lipoproteins (HDL) are increasingly recognized for their potential to mitigate cardiac ischemia/reperfusion (I/R) injury.
• HDL exerts protective effects through various ligands and signaling pathways, including antioxidant and anti-inflammatory actions.

Purpose of the Study:

• To review the cardioprotective benefits of HDL in myocardial infarction.
• To detail the mechanisms by which HDL modulates cardiac function.
• To explore strategies for mitigating post-MI damage by preserving HDL function.

Main Methods:

• Review of cellular and animal models.
• Analysis of clinical studies.
• Discussion of HDL's molecular mechanisms and signaling pathways.

Main Results:

• HDL ligands (S1P, ApoA-I, clusterin, miRNA) influence mitochondrial function, insulin sensitivity, and vascular autacoid production (NO, prostacyclin, endothelin-1).
• HDL's antioxidant activity and sequestration of oxidized molecules combat oxidative stress during I/R.
• HDL undergoes detrimental phenotypic and functional changes during MI due to oxidation and molecule capture, potentially limiting its benefits.

Conclusions:

• HDL offers significant cardioprotection against myocardial infarction through diverse mechanisms.
• Understanding HDL's modulation of cardiac function is crucial for therapeutic development.
• Strategies to counteract HDL dysfunction during MI are needed to fully leverage its protective capacity.