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Rivista di Angiologia

Official Journal of the International Union of Angiology, the International Union of Phlebology and the Central European Vascular Forum
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International Angiology 2003 June;22(2):164-71


lingua: Inglese

Platelets’ glycoproteins and their ligands in patients with intermittent claudication

Gosk-Bierska I. 1, Adamiec R. 1, Szuba A. 2

1 Department and Clinic of Angiology, Hypertension and Diabetology, Wroclaw Medical University Wroclaw, Poland 2 Stanford University School of Medicine, Division of Cardiovascular Medicine, Stanford, CA


Background. Platelet thrombi play critical role in pathogenesis of cardiovascular complications in atherosclerotic peripheral arterial disease (PAOD). The aim of this study was to evaluate the concentration of platelets GP IIb/IIIa, GP I b/IX and plasma levels of their ligands (fibrinogen and vWF) and their relation to other atherosclerotic risk factors in the patients with intermittent claudication secondary to PAOD.
Methods. Consecutive patients of the University Vascular Clinic were studied: 64 claudicants and 38 controls were enrolled. The concentration of platelets GPII b/IIIa and GP Ib/IX was estimated by ELISA method using monoclonal antibody against GPII b/IIIa (CD41a) and GPI b/IX (CD42a Immunotech). Plasma levels of vWF, fibrinogen, and platelets were measured by routine methods.
Results. Plasma vWF (145±41%), fibrinogen (3.8±1 g/l) and platelet concentration of GP Ib/IX (121.1±23.39), GPIIb/IIIa (117.9 6 ±32.7%), as well as plasma lipids and uric acid were statisticaly higher in claudicants than in controls (vWF: 103±42%, fibrinogen: 2.9±0.5 g/l, GP Ib/IX: 100±16.9%, GP IIb/IIIa: 100±29.4%). We have observed statisticaly higher concentration of GP IIb/IIIa and GP Ib/IX in smoking patients than in non-smoking patients with PAOD and significant correlation between the concentration of GP Ib/IX and GP IIb/IIIa and plasma fibrinogen in patients with PAOD and controls.
Conclusions. Our results demonstrate higher platelet concentration of GP Ib/IX,GP IIb/IIIa and elevated plasma levels of ligands for platelets recepors-fibrinogen and vWF in patients with PAOD. This prothrombotic conditions may explain increased cardiovascular morbidity and mortality in this patient’s group.

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