The cardioprotection of the insulin-mediated PI3K/Akt/mTOR signaling pathway

Area of Science:

• Cardiology
• Molecular Biology
• Biochemistry

Background:

• Apoptosis is a key factor in myocardial infarction and other heart injuries.
• Solely inhibiting apoptosis is insufficient for effective cardiomyocyte rescue.
• The PI3K/Akt signaling pathway is crucial in cellular survival and function.

Purpose of the Study:

• To review the protective mechanisms of insulin against myocardial injury.
• To identify key molecular targets of insulin in preventing and treating heart disease.
• To explore how insulin modulates cardiomyocyte apoptosis and cardiac function.

Main Methods:

• Literature review of studies on insulin signaling in the heart.
• Analysis of molecular pathways involved in insulin's cardioprotective effects.
• Examination of studies investigating insulin's role in myocardial infarction and ischemia/reperfusion injury.

Main Results:

• Insulin activates the PI3K/Akt pathway, inhibiting cardiomyocyte apoptosis.
• Insulin preserves and improves regional and overall cardiac function.
• Insulin regulates multiple signaling molecules including eNOS, FOXOs, Bad, GSK-3β, mTOR, NDRG2, and Nrf2.

Conclusions:

• Insulin offers significant cardioprotection by inhibiting apoptosis and enhancing cardiac function.
• Targeting the PI3K/Akt pathway with insulin presents a viable therapeutic strategy for myocardial injury.
• Understanding insulin's molecular targets is essential for developing novel treatments for heart diseases.