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Experimental obstructive coronary atherosclerosis in the hyperlipidemic hamster
A Sima1, A Bulla, N Simionescu
1Institute of Cellular Biology and Pathology, Bucharest, Romania.
Journal of Submicroscopic Cytology and Pathology
|January 1, 1990
Summary
Male hamsters fed a high-fat, cholesterol-rich diet developed progressive coronary atherosclerosis, mimicking human disease. This hamster model is suitable for studying obstructive coronary artery disease mechanisms.
Area of Science:
- Cardiovascular Research
- Animal Models of Disease
- Atherosclerosis Pathogenesis
Background:
- Hyperlipidemia is a primary risk factor for atherosclerosis.
- Understanding the cellular and molecular progression of atherosclerotic lesions is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the temporal development of coronary atherosclerotic lesions in hamsters fed a hyperlipidemic diet.
- To evaluate the suitability of the hamster as an animal model for studying obstructive coronary atherosclerosis.
Main Methods:
- Male hamsters were fed a diet supplemented with cholesterol and butter for up to 40 weeks.
- Control hamsters received standard chow.
- Monthly assessments included serum lipid analysis and examination of coronary artery lesions.
Main Results:
- Hyperlipidemic hamsters showed a significant, progressive increase in serum cholesterol and low-density lipoproteins.
- Morphological changes in coronary arteries were observed as early as 2 weeks, progressing to lipid deposition, smooth muscle cell migration, and foam cell formation.
- Late-stage lesions exhibited extracellular cholesterol accumulation, calcification, necrosis, and arterial narrowing, resembling human atherosclerotic plaques.
Conclusions:
- The hamster model effectively replicates the key pathological features of human coronary atherosclerosis.
- This model is valuable for studying the molecular and cellular events underlying obstructive coronary artery disease.