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Effects of low-dose pravastatin sodium on plasma cholesterol levels and aortic atherosclerosis of heterozygous WHHL rabbits fed a low cholesterol (0.03%) enriched diet for one year.

Abstract：

:The aim of this study was to evaluate the cholesterol-lowering and antiatherosclerotic effect of the HMG-CoA reductase inhibitor pravastatin sodium at a dosage comparable to human therapy. Twelve heterozygous WHHL rabbits (13 months old) were fed 100 g per day of a low cholesterol (0.03%) enriched diet for 12 months. Six of these animals also received pravastatin sodium at a daily dose of 1 mg/kg body weight (verum group). In the verum group, total plasma cholesterol levels were lower by 47%(P < 0.05) and relative aortic plaque volume (% ratio of total plaque volume to the aortic lumen) was reduced by 78% (P < 0.05), when compared to the control group. Plaque composition was analysed at 30 cross-sectional levels of the entire aortic wall using a grid window. Compared to the control group, the plaque type, in terms of architecture and composition, was altered as follows: lesions in the verum group had no confluent atheromatous cores and showed a pattern of a diffuse mixture of the main plaque components with a decreased relative content of necrosis (-44%) and an increased relative content of smooth muscle cells (+19%), whereas the relative content of macrophage-derived foam cells and collagen were nearly unaffected. Furthermore, a similar plaque volume and type was observed in animals with comparable cholesterol profiles. There was no histologic evidence for structurally damaging effects of pravastatin sodium on the arterial wall. We conclude that pravastatin sodium reduces total plasma cholesterol levels in this animal model, thereby leading to smaller plaques and a different plaque type.

journal_name

Atherosclerosis

journal_title

Atherosclerosis

authors

Harsch M,Braesen JH,Niendorf A

doi

10.1016/s0021-9150(96)05986-2

subject

Has Abstract

pub_date

1997-02-10 00:00:00

pages

139-47

issue

2

eissn

0021-9150

issn

1879-1484

pii

S0021-9150(96)05986-2

journal_volume

128

pub_type

杂志文章

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