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March 1, 1998Arteriosclerosis Thrombosis and Vascular BiologyOpen Access

LDL Hypercholesterolemia Is Associated With Accumulation of Oxidized LDL, Atherosclerotic Plaque Growth, and Compensatory Vessel Enlargement in Coronary Arteries of Miniature Pigs

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Population

Miniature pigs (n=36)

Comparison

4% cholesterol diet for 6, 14, or 24 weeks to… vs Control pigs (implied normal diet)

Design

Preclinical

Follow-up

up to 24 weeks

Key result

A 4% cholesterol diet in miniature pigs for 24 weeks resulted in compensatory vessel enlargement, increasing mean luminal area from 1.42 mm2 in controls to 4.38 mm2 (P=0.007).

Authors

PHPaul HolvoetGTGregor TheilmeierBSBharati Shivalkar

Discussion

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Overview

Does not inform clinical practice; hypothesis-generating for oxidized LDL in experimental plaque progression.

Structured PICO

P
Population
36 miniature pigs fed a 4% cholesterol diet and followed for up to 24 weeks to assess coronary artery plaque progression and vessel enlargement.
I
Intervention
4% cholesterol diet for 6, 14, or 24 weeks to induce LDL-hypercholesterolemia
C
Comparator
Control pigs (implied normal diet)
O
Outcome
Progression of atherosclerotic plaques (intimal area) and compensatory vessel enlargement (internal elastic lamina and luminal area) in coronary arteries, and their association with oxidized LDL accumulationsurrogate

Main Result

Absolute Event Rate: 4.38% vs 1.42%

p-value: p=0.007

In a miniature pig model, accumulation of oxidized LDL in coronary plaques correlates strongly with plaque growth and compensatory vessel enlargement, independent of plasma LDL levels.

Cite This Study

Holvoet et al. (1998) studied LDL-hypercholesterolemia (n=36). 4% cholesterol diet vs. Control diet was evaluated on Mean luminal area at 24 weeks (p=0.007). A 4% cholesterol diet in miniature pigs for 24 weeks resulted in compensatory vessel enlargement, increasing mean luminal area from 1.42 mm2 in controls to 4.38 mm2 (P=0.007).

synapsesocial.com/papers/6a63ab0e809dd4a9e2c1f109https://doi.org/10.1161/01.atv.18.3.415
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