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Arteriosclerosis, Thrombosis, and Vascular Biology. 1994;14:375-380

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Arteriosclerosis and Thrombosis, Vol 14, 375-380, Copyright © 1994 by American Heart Association

ARTICLES

Contribution of platelets and the vessel wall to the antithrombotic effects of a single bolus injection of Fab fragments of the antiplatelet GPIIb/IIIa antibody 7E3 in a canine arterial eversion graft preparation

RG Kiss, JM Stassen, H Deckmyn, T Roskams, HK Gold, EF Plow and D Collen
Center for Molecular and Vascular Biology, University of Leuven, Belgium.

The contribution of platelets and the vessel wall to the antithrombotic effects of a single intravenous bolus injection of 0.8 mg/kg Fab fragments of the monoclonal antiplatelet glycoprotein IIb/IIIa receptor antibody 7E3 (7E3-Fab), combined with continuous heparin anticoagulation (100 U/kg bolus and 50 U/kg per hour), was studied in a canine preparation consisting of an everted (inside out) carotid arterial segment that had been inserted into a transected femoral artery. In all 6 control dogs without antibody, persistent or transient eversion graft occlusion occurred during an initial 2-hour observation period, and 5 of the 6 grafts were occluded at 24 hours. In 6 dogs given 7E3-Fab 24 hours before receiving an everted carotid artery segment from a donor dog, cyclic occlusion and reflow occurred in all dogs, whereas the grafts were patent at the end of a 2-hour observation period in 5 of the 6 dogs (P = .056 versus control). When transferred back to the donor dogs, the patient eversion segments showed brief periods of cyclic occlusion and reflow within 2 hours in 3 of 5 dogs (P = .034 versus control), whereas all of the 5 eversion segments were patent at 24 hours (P < .005 versus control).(ABSTRACT TRUNCATED AT 250 WORDS)


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