Novel Insights into the Cardioprotective Effects of the Peptides of the Counter-Regulatory Renin-Angiotensin System

Area of Science:

• Cardiovascular Physiology
• Endocrinology
• Pharmacology

Background:

• Cardiovascular diseases (CVDs) are a leading cause of global morbidity and mortality.
• The classical renin-angiotensin system (RAS) plays a crucial role in cardiovascular homeostasis but its overactivation drives CVD progression.
• An alternative, counter-regulatory RAS pathway exists, producing cardioprotective peptides.

Purpose of the Study:

• To review the latest findings on the cardioprotective effects of key peptides from the counter-regulatory RAS.
• To highlight the therapeutic potential of these peptides in managing cardiovascular diseases.

Main Methods:

• Literature review of studies investigating the counter-regulatory RAS and its peptides.
• Analysis of signaling pathways mediated by angiotensin type 2 receptor (AT2R), MasR, and MrgD.
• Synthesis of evidence on downstream cardioprotective mechanisms.

Main Results:

• Counter-regulatory RAS peptides, including Angiotensin-(1-7), Angiotensin-(1-9), and Alamandine, activate protective pathways.
• These pathways lead to reduced cardiac fibrosis and myocardial hypertrophy.
• Key outcomes include vasodilation, decreased blood pressure, natriuresis, and increased nitric oxide synthesis.

Conclusions:

• The counter-regulatory RAS peptides demonstrate significant cardioprotective effects.
• These peptides represent promising therapeutic targets for mitigating cardiovascular disease progression.
• Targeting the counter-regulatory RAS offers a novel strategy for CVD management.