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Updated: May 2, 2026

A Human Ex Vivo Atherosclerotic Plaque Model to Study Lesion Biology
Published on: May 6, 2014
Atherosclerosis of coronary blood vessels - local or systemic inflamation?
Hristo Pejkov1, Sasko Kedev1, Saso Panov
1University Clinic of Cardiology, Medical Faculty, Ss. Cyril and Methodius University, Skopje, R. Macedonia.
Insights
Atherosclerotic lesions predispose individuals to acute ischemic events. Plaque stability, not size, dictates rupture risk, crucial for understanding atherogenesis and preventing heart attacks.
Area of Science:
- Cardiovascular Science
- Pathophysiology
- Vascular Biology
Background:
- Atherosclerotic lesions in blood vessels predispose to acute ischemic attacks.
- Endothelial dysfunction, characterized by impaired nitric oxide (NO) production or vasoactive substance imbalance, contributes to lumen occlusion.
- Atherosclerotic plaque development and endothelial dysfunction synergistically impact vascular pathobiology.
Purpose of the Study:
- To investigate the role of atherosclerotic lesions in acute ischemic events.
- To understand the mechanisms of endothelial dysfunction in atherogenesis.
- To identify risk factors influencing atherogenesis and atherothrombotic events.
Main Methods:
- Review of existing literature on atherosclerosis and endothelial dysfunction.
- Analysis of studies correlating plaque characteristics with clinical outcomes.
- Examination of molecular and path-physiological processes in vascular disease.
Main Results:
- Atherosclerotic lesions are a significant risk factor for acute ischemic attacks and myocardial infarction.
- Endothelial dysfunction contributes to vessel constriction and lumen occlusion.
- Thin fibrous plaques (10-20% of population) are responsible for 80-90% of clinical events due to rupture.
- Plaque stability, rather than absolute size, is the primary determinant of rupture potential.
Conclusions:
- Understanding plaque stability is critical for predicting rupture and clinical events.
- Identifying risk factors for atherogenesis is essential for developing preventative strategies.
- Further research into the interplay between endothelial function and plaque development is warranted.
Abstract:
The presence of atherosclerotic lesions in the blood vessels is a predisposition for the development and occurrence of acute ischaemic attacks. Bigger atherosclerotic lesions in the coronary blood vessels cause lumen occlusion, which is a cause of acute myocardial infarction. Endothelial dysfunction is defined as an ability of the endothelium to produce vasorelaxing nitric oxide (NO), or deregulation of the other vasoactive substances, such as angiotensin II and endothelin [13]. This definition describes endothelial dysfunction as an improper vasomotor constriction of the vessel, that leads to lumen occlusion of the already existing atherosclerotic lesions. According to the modern model, the development of atherosclerotic plaque and inappropriate endothelial NO production have a synergistic role in patho-physiological and molecular processes in the blood vessels [14]. Lesions in the coronary arteries are deposits of huge quantities of foamy cells and fibrous plaques. The thin fibrous plaques are 10-20% of the total plaque population and are the cause of 80-90% of clinical cases due to their ability to rupture [48]. According to all the results from published studies by far, it has been pointed out that the plaque stability, not the absolute size influences the rupture potential. Elucidating the risk factors that may modify in the atherogenesis and the consequent atherothrombic effect is the first step to this goal.
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