Abstract:
BACKGROUND:Venous coronary artery bypass grafts (CABGs) are prone to accelerated atherosclerosis. In atherosclerotic diseases, serum C-reactive protein (CRP) levels have become an important diagnostic and prognostic marker. The origin of CRP in this setting remains to be elucidated. METHODS AND RESULTS:Monoclonal anti-CRP identified CRP expression in medial and intimal alpha-actin-positive smooth muscle cells (SMCs) of diseased CABGs with type V and VI lesions and also of native saphenous veins of atherosclerotic individuals. In addition, patent coronary arteries with type IV and V but not with type I through III lesions exhibited intense SMC staining for CRP. Calcified desobliterates of occluded coronary arteries with end-stage disease did not show SMC staining for CRP and were consistently negative for CRP mRNA, as detected by means of real-time polymerase chain reaction. However, CRP mRNA was expressed in 11 of 15 diseased CABGs and also in 10 of 15 native veins. By contrast, only 3 of 18 internal mammary and 4 of 12 radial arteries with virtually no atherosclerosis were positive for CRP mRNA. CONCLUSIONS:CRP is produced by SMCs of atherosclerotic lesions with active disease but not in end-stage plaques. The role of CRP constitutively expressed by normal vascular tissue in vein graft disease has yet to be elucidated.
journal_name
Circulationjournal_title
Circulationauthors
Jabs WJ,Theissing E,Nitschke M,Bechtel JF,Duchrow M,Mohamed S,Jahrbeck B,Sievers HH,Steinhoff J,Bartels Cdoi
10.1161/01.CIR.0000092184.43176.91subject
Has Abstractpub_date
2003-09-23 00:00:00pages
1428-31issue
12eissn
0009-7322issn
1524-4539pii
01.CIR.0000092184.43176.91journal_volume
108pub_type
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