Antithrombotic effect of a humanized anti-GPIIb/IIIa monoclonal antibody, YM207, in a photochemically induced thrombosis model in monkeys.
Eur J Pharmacol
; 279(2-3): 115-21, 1995 Jun 12.
Article
em En
| MEDLINE
| ID: mdl-7556391
ABSTRACT
We investigated the antithrombotic effects of a F(ab')2 fragment of a humanized anti-platelet glycoprotein (GP) IIb/IIIa monoclonal antibody, YM207, in a platelet-rich thrombosis model. Thrombus was induced in a mesenteric venule of squirrel monkeys by irradiation with filtered light in combination with i.v. administration of a fluorescent dye (sodium fluorescein). Time to occlusive thrombus formation was significantly prolonged by i.v. bolus injection of 0.3 mg/kg of YM207. At doses of 1 mg/kg and 3 mg/kg, complete occlusion did not occur during 60 min of the observation. Platelet aggregation in platelet-rich plasma was inhibited by YM207 at doses 0.3 mg/kg or more. A good correlation was obtained between inhibition of platelet aggregation and the percentage of GPIIb/IIIa receptors blocked by YM207. Bleeding time was significantly prolonged at a dose of 3 mg/kg. Platelet counts showed no significant change. These results suggest that YM207 is effective in preventing platelet-rich thrombus formation without inducing the prolongation of bleeding time or a significant decrease in platelet count. YM207 may be a useful therapeutic agent for the treatment of thrombotic disorders.
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Base de dados:
MEDLINE
Assunto principal:
Trombose
/
Complexo Glicoproteico GPIIb-IIIa de Plaquetas
/
Fibrinolíticos
/
Anticorpos Monoclonais
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Eur J Pharmacol
Ano de publicação:
1995
Tipo de documento:
Article
País de afiliação:
Japão