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Related Experiment Video

Updated: Jun 19, 2026

Quantitative Analysis and Characterization of Atherosclerotic Lesions in the Murine Aortic Sinus

Quantitative Analysis and Characterization of Atherosclerotic Lesions in the Murine Aortic Sinus

Published on: December 7, 2013

FURTHER STUDIES IN EXPERIMENTAL ATHEROSCLEROSIS.

¹Department of Pathology of the College of Physicians and Surgeons, Columbia University, New York.

The Journal of Experimental Medicine

|October 30, 2009

Summary

Injecting cholesterol in sesame oil into dogs for 7-8 months induced pulmonary artery changes resembling human arteriosclerosis. These lesions, primarily in the arterial media, show disorganization and hyperplasia, mimicking early-stage atherosclerosis.

Area of Science:

Cardiovascular Research
Pathology
Experimental Medicine

Background:

Arteriosclerosis is a significant human cardiovascular disease.
Understanding the early mechanisms of arteriosclerosis is crucial for developing effective treatments.
Animal models are essential for studying complex disease processes like atherosclerosis.

Purpose of the Study:

To investigate the effects of cholesterol and sesame oil injections on canine pulmonary arteries.
To determine if experimental induction can mimic human arteriosclerosis.
To analyze the microscopic changes in the pulmonary artery wall.

Main Methods:

Four young dogs received regular jugular vein injections of cholesterol dissolved in sesame oil for 7-8 months.
Aortic constriction was performed in some dogs to assess its influence.

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Quantification of Atherosclerosis in Mice

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Pulmonary artery tissues were examined macroscopically and microscopically.

Main Results:

Injected dogs developed nodules and thickenings in the pulmonary artery, resembling human arteriosclerosis.
Lesions originated at the pulmonary artery's base, primarily affecting the media with disorganized elastic and muscular elements.
Intimal hyperplasia was observed, particularly over damaged media or in dilated branches, while smaller lung arteries remained unaffected.

Conclusions:

Experimental cholesterol administration in dogs can induce pulmonary artery lesions analogous to early human arteriosclerosis.
The observed changes suggest mechanical stress from oil emboli triggers the arterial wall's response.
The study provides insights into the pathogenesis of arteriosclerosis, particularly its early vascular changes.