Human C-reactive protein does not promote atherosclerosis in transgenic rabbits.

Abstract:

BACKGROUND:Although there is a statistically significant association between modestly raised baseline plasma C-reactive protein (CRP) values and future cardiovascular events, the debate is still unsettled in regard to whether CRP plays a causal role in the pathogenesis of atherosclerosis. METHODS AND RESULTS:We generated 2 lines of transgenic (Tg) rabbits expressing human CRP (hCRP). The plasma levels of hCRP in hCRP-Tg-1 and hCRP-Tg-2 rabbits were 0.4+/-0.13 (n=14) and 57.8+/-20.6 mg/L (n=12), respectively. In addition, hCRP isolated from Tg rabbit plasma exhibited the ability to activate the rabbit complement. To define the role of hCRP in atherosclerosis, we compared the susceptibility of hCRP-Tg rabbits to cholesterol-rich diet-induced aortic and coronary atherosclerosis with that of non-Tg rabbits. After being fed with a cholesterol-rich diet for 16 weeks, Tg and non-Tg rabbits developed similar hypercholesterolemia and lesion sizes in both aortic and coronary arteries. Immunohistochemical staining and Western blotting revealed that hCRP was indeed present in the lesions but did not affect macrophage accumulation and smooth muscle cell proliferation of the lesions. CONCLUSIONS:Neither high nor low plasma concentrations of hCRP affected aortic or coronary atherosclerosis lesion formation in hCRP-Tg rabbits.

journal_name

Circulation

journal_title

Circulation

authors

Koike T,Kitajima S,Yu Y,Nishijima K,Zhang J,Ozaki Y,Morimoto M,Watanabe T,Bhakdi S,Asada Y,Chen YE,Fan J

doi

10.1161/CIRCULATIONAHA.109.872796

subject

Has Abstract

pub_date

2009-11-24 00:00:00

pages

2088-94

issue

21

eissn

0009-7322

issn

1524-4539

pii

CIRCULATIONAHA.109.872796

journal_volume

120

pub_type

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