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Dotted collar placed around carotid artery induces asymmetric neointimal lesion formation in rabbits without intravascular manipulations.

Abstract：

BACKGROUND:Neointimal formation in atherosclerosis has been subject for intense research. However, good animal models mimicking asymmetrical lesion formation in human subjects have been difficult to establish. The aim of this study was to develop a model which would lead to the formation of eccentric lesions under macroscopically intact non-denuded endothelium. METHODS:We have developed a new collar model where we placed two cushions or dots inside the collar. Arterial lesions were characterized using histology and ultrasound methods. RESULTS:When this dotted collar was placed around carotid and femoral arteries it produced asymmetrical pressure on adventitia and a mild flow disturbance, and hence a change in shear stress. Our hypothesis was that this simple procedure would reproducibly produce asymmetrical lesions without any intraluminal manipulations. Intima/media ratio increased towards the distal end of the collar with the direction of blood flow under macroscopically intact endothelium. Macrophages preferentially accumulated in areas of the thickest neointima thus resembling early steps in human atherosclerotic plaque formation. Proliferating cells in these lesions and underlying media were scarce at eight weeks time point. CONCLUSION:The improved dotted collar model produces asymmetrical human-like atherosclerotic lesions in rabbits. This model should be useful in studies regarding the pathogenesis and formation of eccentric atherosclerotic lesions.

journal_name

BMC Cardiovasc Disord

journal_title

BMC cardiovascular disorders

authors

Kivelä A,Hartikainen J,Ylä-Herttuala S

doi

10.1186/1471-2261-12-91

subject

Has Abstract

pub_date

2012-10-17 00:00:00

pages

91

issn

1471-2261

pii

1471-2261-12-91

journal_volume

12

pub_type

杂志文章

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