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Vascular innervation in atherogenesis

R D Butt¹, T M Scott

¹Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada.

|January 1, 1997

Summary

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Silastic collars induce atherosclerosis by injuring carotid arteries, not by denervation. Injury causes intimal thickening and foam cell development, but denervated segments show no morphological changes.

Area of Science:

Vascular Biology
Atherosclerosis Research

Background:

Collar-induced atherosclerosis is a model for studying arterial disease.
The precise mechanism, particularly the role of perivascular denervation, remains unclear.

Purpose of the Study:

To investigate the mechanism of collar-induced atherosclerosis.
To determine if perivascular denervation contributes to atherosclerosis development.

Main Methods:

Common carotid arteries of rabbits were injured to mimic collar application.
Innervation changes and intima/media ratios were assessed.
Cholesterol-fed rabbits were used to model hyperlipidemia.

Main Results:

Injury induced intimal thickening and foam cell formation, particularly in cholesterol-fed rabbits.

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Denervation was confirmed in segments between injury sites.

Denervated segments did not exhibit morphological differences from uninjured arteries.

Conclusions:

Perivascular denervation is a consequence of collar application, not a cause of atherosclerosis.
Arterial injury, not denervation, is the primary driver of atherosclerosis in this model.