Pathobiology of atherosclerosis--a brief review

Area of Science:

• Cardiovascular Biology
• Immunology
• Pathology

Background:

• Atherosclerosis is increasingly recognized as an inflammatory disease of the arterial wall.
• Cytokines such as platelet-derived growth factor (PDGF), interleukin-1, tumor necrosis factor (TNF)-alpha, and MCP-1 play critical roles in modulating atherosclerotic plaque progression and stability.
• The response-to-injury model is fundamental to understanding atherogenesis.

Purpose of the Study:

• To review the current understanding of atherosclerosis pathobiology, focusing on its inflammatory nature.
• To highlight factors initiating endothelial injury and their role in atherogenesis.
• To discuss novel diagnostic approaches for detecting vulnerable atherosclerotic plaques.

Main Methods:

• Review of current literature on atherosclerosis pathobiology and inflammation.
• Discussion of the response-to-injury model in atherogenesis.
• Overview of emerging diagnostic technologies for plaque characterization.

Main Results:

• Endothelial injury, induced by factors like hypertension, oxidized LDL, and toxins, increases LDL receptor expression and monocyte/macrophage adherence.
• Cytokine balance dictates whether atherosclerotic plaques progress or stabilize.
• Vulnerable plaques can rupture, leading to acute coronary syndromes.

Conclusions:

• A comprehensive understanding of atherosclerotic plaque biology offers numerous therapeutic targets.
• Novel diagnostic tools are being developed to identify plaque rupture risk.
• Intervening in arterial injury and the inflammatory response holds promise for managing atherosclerosis.