Specificities of platelet autoantibodies in patients with lupus anticoagulants in primary antiphospholipid syndrome |
| |
Authors: | S. Panzer M. E. Gschwandtner D. Hütter S. Spitzauer I. Pabinger |
| |
Affiliation: | Clinical Department for Blood Group Serology, University of Vienna, W?hringer Gürtel 18–20, A-1090 Vienna, Austria, AT Internal Medicine I, University of Vienna, Austria, AT Department for Laboratory Medicine, University of Vienna, Austria, AT
|
| |
Abstract: | We have studied target platelet antigens in 22 patients with lupus anticoagulants and a primary antiphospholipid syndrome in order to determine whether any specificities of platelet autoantibodies are correlated with thromboembolism, and if these antibodies cross-reacte with phospholipids, which would suggest their role in the development of thromboembolic disease. Platelet counts were median 203×109/l, range 100–298×109/l. Platelet antibodies were found in six thrombocytopenic patients and in further nine patients. All these 15 patients had antibodies against GPIIb/IIIa, five patients against GPIb/IX, and six patients against GPIV. Anti-GPIb/IX and -GPIV occurred only in combination with anti-GPIIb/IIIa antibodies. There was no correlation between the presence of detectable platelet antibodies or any of their glycoprotein specificity and thrombocytopenia or the history of a thromboembolic disease. Eluates from platelets contained only GPIIb/IIIa reactivities, but neither anti-GPIb/IX nor anti-GPIV. None of the eluates contained lupus anticoagulant activity. In one case, the platelet eluates contained anti-GPIIb/IIIa and anticardiolipin IgG antibodies. These results suggest that in patients with a primary antiphospholipid syndrome the presence of platelet autoantibodies neither indicate a risk for thromboembolic disorder nor have lupus anticoagulant activity. Received: 27 January 1997 / Accepted: 10 March 1997 |
| |
Keywords: | Lupus anticoagulants Platelet antibodies Antiphospholipid antibodies Thromboembolism Thrombocytopenia |
本文献已被 SpringerLink 等数据库收录! |
|