Prospects for Creation of Cardioprotective and Antiarrhythmic Drugs Based on Opioid Receptor Agonists

Area of Science:

• Cardiovascular Pharmacology
• Opioid Receptor Modulation
• Cardiac Ischemia/Reperfusion Injury

Background:

• Ischemia/reperfusion (I/R) injury significantly damages the heart.
• Current treatments for I/R injury have limitations.
• Opioid receptors are implicated in cardiac protection.

Purpose of the Study:

• To evaluate the potential of opioid receptor (OR) agonists in mitigating cardiac I/R injury.
• To explore the protective mechanisms of OR agonists against cardiomyocyte death and dysfunction.

Main Methods:

• Investigated the effects of micro, δ1, δ2, and κ1 OR agonists.
• Assessed the impact of OR agonists on cardiomyocyte necrosis and apoptosis during I/R.
• Evaluated cardiac contractility during the reperfusion period.
• Examined the infarct-reducing effects of prophylactic and therapeutic administration of OR agonists.

Main Results:

• Micro, δ1, δ2, and κ1 OR agonists demonstrated significant cardioprotective effects against I/R injury.
• Opioids prevented both necrosis and apoptosis of cardiomyocytes during I/R.
• OR agonists improved cardiac contractility post-reperfusion.
• Prophylactic administration of OR agonists reduced infarct size.
• Opioids mimicked preconditioning and postconditioning phenomena, preventing reperfusion-induced cardiomyocyte death.
• Opioids were effective in preventing ischemia-induced arrhythmias.

Conclusions:

• Micro, δ1, δ2, and κ1 OR agonists are highly promising for developing novel cardioprotective drugs.
• Opioids offer a versatile therapeutic strategy for I/R injury, acting via preconditioning and postconditioning mechanisms.
• Targeting opioid receptors presents a viable approach to prevent cardiomyocyte death, improve cardiac function, and reduce arrhythmias during I/R events.