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[Structural and functional characteristics of thrombocytes in chronic ischemic heart disease]
Insights
Platelets in chronic coronary heart disease patients exhibit structural changes, including size variations and granule alterations. These shifts impair aggregation and suggest reduced resistance to atherogenesis.
Area of Science:
- Hematology
- Cardiovascular Research
- Cell Biology
Context:
- Chronic coronary heart disease (CHD) involves complex pathophysiological mechanisms.
- Platelet function is critical in thrombotic events and atherogenesis.
- Understanding platelet morphology and function in CHD is essential for therapeutic development.
Purpose:
- To investigate the ultrastructural and functional characteristics of platelets in patients with chronic coronary heart disease.
- To correlate observed platelet changes with disease progression and atherogenesis.
Summary:
- Electron microscopy, cytochemistry, fluorescence microscopy, and radionuclide studies revealed platelet polymorphism in 103 chronic coronary heart disease patients.
- Observed changes included diverse platelet sizes, variable alpha-granule content, degenerative forms, and a shorter platelet lifespan with increased immature forms.
- Increased activated and degranulated platelets, along with glycocalyx rearrangement, impaired platelet aggregation.
Impact:
- These structural platelet alterations diminish their resistance to atherogenic factors.
- The findings highlight significant shifts in platelet biology contributing to coronary heart disease exacerbations.
- Provides insights into novel therapeutic targets for managing chronic coronary heart disease.
Abstract:
Platelets from 103 patients with chronic coronary heart disease were studied electron microscopically, cytochemically, fluorescence microscopically and with radionuclides. The platelets showed polymorphism indicated by diverse sizes, various content of alpha-granules in platelets, emergence of degenerative hyperosmiophilic forms. Shorter life cycle of the platelets was observed in line with a compensatory increase in the number of their immature forms. Abundance of reversibly and irreversibly activated and degranulated cells impaired platelet aggregation. These changes entailed rearrangement of platelet glycocalyx. The findings evidence noticeable structural shifts in platelets which diminish their resistance to factors stimulating atherogenesis and underlying aggravations of coronary heart disease.