[Association between IGF system and PAPP-A in coronary atherosclerosis]

Area of Science:

• Cardiovascular Biology
• Endocrinology
• Molecular Medicine

Background:

• Atherosclerosis involves complex, incompletely understood pathophysiological mechanisms.
• New molecular players are continually identified in atherogenesis.
• The insulin-like growth factor (IGF) system and its regulators are implicated in cardiovascular disease.

Purpose of the Study:

• To review the interplay between the IGF system and pregnancy-associated plasma protein-A (PAPP-A) in atherosclerosis.
• To elucidate the molecular mechanisms of IGF-1 and PAPP-A in vascular cells.
• To highlight their roles in atherogenic processes.

Main Methods:

• Literature review focusing on the IGF system, PAPP-A, and atherosclerosis.
• Analysis of molecular effects on vascular smooth muscle cells and macrophages.
• Emphasis on IGF-1 signaling pathways and PAPP-A's regulatory role.

Main Results:

• IGF-1 influences vascular smooth muscle cells by promoting migration and preventing apoptosis, enhancing plaque stability.
• In macrophages, IGF-1 reduces reverse cholesterol transport, contributing to foam cell formation.
• PAPP-A regulates IGF-1 bioavailability, modulating these cellular effects.

Conclusions:

• The IGF system, particularly IGF-1, is a significant factor in atherosclerosis progression.
• PAPP-A critically modulates IGF-1's actions within the atherosclerotic environment.
• Understanding these interactions offers potential therapeutic targets for atherosclerosis.