(Circulation. 2000;101:2935.)
© 2000 American Heart Association, Inc.
Clinical Investigation and Reports |
From the Department of Pediatrics (A.S.), Tokyo Teishin Hospital; the Department of Pediatric Cardiology (S.M.-T., M.N.), the Cardiovascular Research Division (K.K.), the Department of Pathology (T.N.), and the Department of Cardiology (Y.S.), Tokyo Womens Medical University; and the Department of Cardiology (T.H.), Obara Cardiovascular Center, Tokyo, Japan.
Correspondence to Atsuko Suzuki, MD, Department of Pediatrics, Tokyo Teishin Hospital, 2-14-23 Fujimi, Chiyoda-ku, Tokyo, 102-8796, Japan. E-mail asuzuki{at}tpth.go.jp
BackgroundRemodeling of the coronary artery lesions in Kawasaki disease has been observed in longitudinal angiographic studies. However, mechanisms of such remodeling have not yet been elucidated.
Methods and ResultsWe examined formalin-fixed specimens of the coronary arteries immunohistochemically by using antibodies against vascular growth factors (GFs) and their receptors in 7 children with Kawasaki disease, 9 children with no coronary disease, and 3 adults with atherosclerosis. In the thickened intima at stenotic sites and at recanalized vessels with Kawasaki disease, extensive expression of vascular GFs, such as transforming GF-ß1, platelet-derived GF-A, and basic fibroblast GF, was observed both within and surrounding smooth muscle cells. Vascular endothelial GF was observed within smooth muscle cells. Furthermore, all of these GFs were strongly expressed in the newly formed microvessels within the intima. In the thinned media, these GFs were focally and weakly expressed. In contrast, these GFs were expressed only in the media in the control children. In cases of adult atherosclerosis, GFs were expressed diffusely in the media but focally and weakly if at all in the intima.
ConclusionsActive remodeling of the coronary artery lesions in Kawasaki disease continues in the form of luxuriant intimal proliferation and neoangiogenesis for several years after the onset of the disease. This process is distinct from adult-onset atherosclerosis.
Key Words: growth substances vasculature stenosis aneurysm thrombosis
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