Effects of atorvastatin on in-stent stenosis in normo- and hypercholesterolemic rabbits.

Abstract:

BACKGROUND:In-stent stenosis is characterized by a prolonged proliferation and inflammatory reactions around the stent struts. Potentially the antiproliferative and lipid-lowering effects of atorvastatin can synergistically limit neointima formation after stenting. METHODS:Palmaz-Schatz stents were placed in the iliac arteries of white New Zealand rabbits. One half of the animals was fed an 0.5% hypercholesterolemic diet, the other half was normocholesterolemic. Both groups received either atorvastatin (3 mg/kg bodyweight) daily or placebo (n=10 each in the four groups). After 28 days the segments were excised. RESULTS:Injury scores as a result of vessel trauma induced by stent-overstretch injury differed significantly between the four groups (median 1.0-1.9) and the stent-induced injury outweighed the beneficial effects of statin therapy on neointima formation by far. Smooth-muscle-cell proliferation was significantly increased in both hypercholesterolemic groups. Intimal and medial proliferation as well as inflammatory infiltrates around the stent strut were reduced by 20-40% in animals that received statin therapy although the injury score in both statin groups was 19 and 60% higher than in control animals. CONCLUSION:Thus, the data of this study indicate that smooth muscle cell proliferation and inflammation in stented vessels can be reduced by atorvastatin both in hypercholesterolemic rabbits and in animals with normal lipid levels.

journal_name

Int J Cardiol

authors

Herdeg C,Fitzke M,Oberhoff M,Baumbach A,Schroeder S,Karsch KR

doi

10.1016/s0167-5273(02)00588-0

subject

Has Abstract

pub_date

2003-09-01 00:00:00

pages

59-69

issue

1

eissn

0167-5273

issn

1874-1754

pii

S0167527302005880

journal_volume

91

pub_type

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