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Original Paper

Platelet Aggregation in Portal Hypertension and Its Modification by Ultra-Low Doses of Aspirin

Eizayaga F.X.a · Aguejouf O.b · Belon P.c · Doutremepuich C.b

Author affiliations

aCatedra de Fisiopatologia, Facultad de Farmacia y Bioquimica, Universidad de Buenos Aires, Buenos Aires, Argentina; bLaboratoire d’Hématologie, Université de Bordeaux 2, Victor Segalen, Bordeaux, and cLaboratoires Boiron, Sainte-Foy-les-Lyons, France

Corresponding Author

Christian Doutremepuich

Laboratoire d’Hématologie, Université de Bordeaux 2, Victor Segalen 146 Rue Léo Saignat

FR–33 076 Bordeaux Cedex (France)

Tel. +33 5 56 98 79 69, Fax +33 5 56 98 79 70, E-Mail sheph@heph.u-bordeaux2.fr

Related Articles for ""

Pathophysiol Haemos Thromb 2005;34:29–34

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Aspirin (ASA) is widely accepted as antithrombotic drug, but several reports point out that its use in ultra-low doses (ULD) has prothrombotic properties. In this study, we evaluate the effect of portal hypertension in rats on platelet aggregation in an in vivo arterial thrombosis model induced by a laser beam. Portal hypertension was produced by calibrated stenosis of the portal vein. ASA in ULD was injected to both control and portal hypertensive groups. Platelet aggregation induced by ADP, prothrombin time, activated partial thromboplastin time, fibrinogen and induced hemorrhagic time test were also performed. Portal hypertensive rats showed a diminished number of emboli and duration of embolization in the laser procedure and an increase in induced hemorrhagic time. These changes were reverted by one injection of ASA at ULD. This observation could be of importance for primary prevention or the treatment of recurrence in upper digestive tract hemorrhage in portal hypertensive patients.

© 2005 S. Karger AG, Basel

Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: December 13, 2004
Accepted: March 23, 2005
Published online: November 18, 2005
Issue release date: November 2005

Number of Print Pages: 6
Number of Figures: 6
Number of Tables: 0

ISSN: 1424-8832 (Print)
eISSN: 1424-8840 (Online)

For additional information: http://www.karger.com/PHT

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