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[Structuro-functional characteristics of the human coronary arteries in atherosclerosis]
Insights
Early stages of coronary atherosclerosis involve crater-like endothelial defects and monocyte adhesion. Echinocytes, or spiky red blood cells, also adhere to damaged endothelium, a novel finding in coronary artery disease research.
Area of Science:
- Cardiovascular Biology
- Pathology
- Microscopy
Context:
- Coronary artery disease (CAD) involves complex interactions between blood cells and the endothelium.
- Understanding early atherogenesis is crucial for developing effective prevention and treatment strategies.
- Previous studies have not fully elucidated the dynamic endothelial changes and cellular interactions in early CAD.
Purpose:
- To analyze the structural features of endothelial interactions with blood cells in varying severities of coronary atherosclerosis.
- To identify specific cellular and structural changes indicative of early atherogenesis.
- To investigate the role of echinocytes and platelet activity in endothelial damage and repair.
Summary:
- Endothelial status in macroscopically unchanged areas was uniform across atherosclerosis severities.
- Crater-like defects and monocyte adhesion are stable indicators of initial atherogenesis.
- Scanning electron microscopy revealed echinocytes adhering to damaged endothelium, a new observation in coronary patients.
- Microthrombi formation is not a consistent early sign; endothelial destruction and regeneration involving platelets occur throughout atherogenesis.
Impact:
- Provides novel insights into the cellular mechanisms of early atherogenesis in coronary arteries.
- Highlights the potential role of echinocytes in the progression of cardiovascular disease.
- Offers a more detailed understanding of endothelial repair processes in atherosclerosis.
- May inform the development of new diagnostic markers or therapeutic targets for early CAD.
Abstract:
Structural features of the endothelium interaction with the blood cellular elements during atherosclerotic processes of varying severity in the coronary arteries have been analyzed from the data of early sections and coronary artery biopsy specimens. The status of the endothelium has been uniform in macroscopically unchanged sites irrespective of the coronary atherosclerosis severity. A stable characteristic symptom of the initial stages of atherogenesis is the formation of crater-like defects and monocyte adhesion. Scanning electron microscopy has shown for the first time the presence of echinocytes in the blood of coronary patients and adhesion of these cells at the site of the endothelial monolayer destruction. The formation of microthrombi at the site of endothelial destruction is not a stable symptom of the initial stages of atherogenesis. Endothelial destruction and regeneration, aided by the platelets, can be observed at all stages of atherogenesis.