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Age-dependent increase of rabbit aortic atherosclerosis. A morphometric approach
L G Spagnoli1, A Orlandi, A Mauriello
1Dipartimento di Chirurgia, II Universita di Roma, Tor Vergata, Italy.
Pathology, Research and Practice
|June 1, 1992
Summary
Aging significantly worsens atherosclerosis development, even without changes in blood lipids. This study quantitatively shows aged rabbits have more advanced atherosclerotic lesions compared to younger ones.
Area of Science:
- Cardiovascular Science
- Aging Research
- Pathology
Background:
- Aging is a primary risk factor for atherosclerosis.
- The precise quantitative impact of aging on atherosclerotic lesion development requires further evaluation.
Purpose of the Study:
- To quantitatively define the role of aging in the development of atherosclerotic lesions.
- To compare morphometric parameters of atherosclerosis in aged versus young hyperlipemic rabbits.
Main Methods:
- White New Zealand rabbits (aged and young) were fed a hyperlipemic diet with cholesterol for 16 months.
- Serum lipid parameters were monitored regularly.
- Morphometric analysis of entire aortas was performed using a Quantimet 920 image analyzer to assess intima volume density, atheroma volume density, intima/media ratio, and intima surface area.
Main Results:
- Aged hyperlipemic rabbits exhibited a statistically significant increase in all measured morphometric parameters compared to young hyperlipemic rabbits.
- No significant differences were observed in serum cholesterol, triglycerides, or phospholipids between the aged and young groups.
Conclusions:
- Aging exacerbates the development of atherosclerotic lesions independently of circulating lipid levels.
- Quantitative morphometric analysis provides a precise method for evaluating the impact of aging on atherosclerosis.