© 2000 American Heart Association, Inc.
Thrombosis |
Anti-Human von Willebrand Factor Monoclonal Antibody AJvW-2 Prevents Thrombus Deposition and Neointima Formation After Balloon Injury in Guinea Pigs
From the Developmental Research Laboratories, Pharmaceutical Research Laboratories, Ajinomoto Co, Inc, Kawasaki, Japan.
Correspondence to Dr Hiroshi Yamamoto, Developmental Research Laboratories, Pharmaceutical Research Laboratories, Ajinomoto Co, Inc, 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi 210-8681, Japan. E-mail hiroshia_yamamoto{at}ajinomoto.com
Abstract—Immediately after angioplasty, platelet adhesion to the injured arterial wall and subsequent release of various mitogens may contribute to neointima formation. The purpose of this study was to evaluate the inhibitory effect of AJvW-2, a monoclonal antibody against human von Willebrand factor (vWF), on neointima formation in a guinea pig model. The carotid artery was injured with a balloon catheter, and AJvW-2 was administered by a single bolus injection. AJvW-2 dose-dependently prevented neointima formation 14 days after injury. Significant inhibition was observed at 1.8 mg/kg, at which dose significant inhibition of platelet aggregation was achieved for 2 days. By elastic-Masson staining, organized thrombi were observed in the neointimal lesion on day 14. The thrombus area was significantly correlated with neointimal thickness. Furthermore, thrombus deposition, immunostained for vWF and fibrin(ogen), was observed on the media immediately after balloon injury. AJvW-2 significantly reduced the deposition of both adhesive proteins and reduced the incidence of organized thrombus formation, which might affect subsequent neointima formation. However, the proliferation of cultured smooth muscle cells was not affected by AJvW-2. These results suggest that AJvW-2 prevents neointima formation by inhibition of initial platelet-mediated thrombus formation rather than by direct inhibition of smooth muscle cell proliferation.
Key Words: AJvW-2 • von Willebrand factor • thrombus • angioplasty • antibodies
This article has been cited by other articles:
 |
|
 |
|
  A. O. Spiel, J. C. Gilbert, and B. Jilma Von Willebrand Factor in Cardiovascular Disease: Focus on Acute Coronary Syndromes Circulation, March 18, 2008; 117(11): 1449 - 1459. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 T. A. Meadows and D. L. Bhatt Clinical Aspects of Platelet Inhibitors and Thrombus Formation Circ. Res., May 11, 2007; 100(9): 1261 - 1275. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. F Viles-Gonzalez, V. Fuster, and J. J Badimon Atherothrombosis: A widespread disease with unpredictable and life-threatening consequences Eur. Heart J., July 2, 2004; 25(14): 1197 - 1207. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. Yamashita, Y. Asada, H. Sugimura, H. Yamamoto, K. Marutsuka, K. Hatakeyama, S. Tamura, Y. Ikeda, and A. Sumiyoshi Contribution of von Willebrand Factor to Thrombus Formation on Neointima of Rabbit Stenotic Iliac Artery Under High Blood-Flow Velocity Arterioscler. Thromb. Vasc. Biol., June 1, 2003; 23(6): 1105 - 1110. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. Bonnefoy, H. Yamamoto, C. Thys, M. Kito, J. Vermylen, and M. F. Hoylaerts Shielding the front-strand beta 3 of the von Willebrand factor A1 domain inhibits its binding to platelet glycoprotein Ibalpha Blood, February 15, 2003; 101(4): 1375 - 1383. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Kageyama, H. Yamamoto, H. Nakazawa, J. Matsushita, T. Kouyama, A. Gonsho, Y. Ikeda, and R. Yoshimoto Pharmacokinetics and Pharmacodynamics of AJW200, a Humanized Monoclonal Antibody to von Willebrand Factor, in Monkeys Arterioscler. Thromb. Vasc. Biol., January 1, 2002; 22(1): 187 - 192. [Abstract] [Full Text] [PDF]
|
|