Platelet Membrane Defects in Glanzmann's Thrombasthenia
نویسندگان
چکیده
منابع مشابه
Platelet membrane defects in Glanzmann's thrombasthenia. Evidence for decreased amounts of two major glycoproteins.
Platelets from patients with Glanzmann's thrombasthenia have a distinct molecular alteration of the plasma membrane surface, namely decreased amounts of a major glycoprotein designated as IIb (apparent mol wt 142,000). To identify other possible surface defects of thrombasthenic platelets, we labeled the membrane polypeptides of normal and thrombasthenic platelets by two different techniques: l...
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concanavalin A-binding proteins are relatively unaffected by the changes in glucose concentration. At this threshold level of glucose the glucose-regulated proteins of Shui et al. (1977) are not apparent. The reappearance of the 100000-mol.wt. glycoprotein can be correlated with the reappearance of the 95 000-mol.wt. glucosamine-labelled glycoprotein (Fig. 2) and there seems, therefore, good re...
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PLASMA CLOTTING FACTOR is deficient in most of the “experiments of nature” that have helped to further our understanding of the mechanism of blood coagulation and hemostasis, but in thrombasthenia the defect lies in the platelets which are unable to promote clot retraction. Thrombasthenic patients usually have a mild to moderately severe hemorrhagic diathesis, with a prolonged bleeding time. Th...
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Patient C.M. presented platelet function defects symptomatic of Glanzmann's thrombasthenia. However, analysis of surface-labeled platelets by SDS-polyacrylamide gel electrophoresis revealed the usual presence of the major glycoproteins, including GP IIb and GP IIIa. Platelet fibrinogen was not detected. Analysis of Triton X-100 extracts of Ca2+-washed C.M. platelets by crossed immunoelectrophor...
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Background—Platelets have been suggested to play a role in the early development of atherosclerosis. As one test of this hypothesis, we assessed whether patients with Glanzmann thrombasthenia who lack platelet glycoprotein IIb 3 (GPIIb/IIIa) complexes or both IIb 3 and the more ubiquitous v 3 cell membrane complexes are protected from development of atherosclerosis. Methods and Results—Seven pa...
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ژورنال
عنوان ژورنال: Journal of Clinical Investigation
سال: 1977
ISSN: 0021-9738
DOI: 10.1172/jci108805