Abstract:
:Washed human platelets were labeled with 125I by the lactoperoxidase-catalyzed method and solubilized in 1% Triton X-100. The soluble proteins were analyzed by crossed-immunoelectrophoresis in 1% agarose, employing a rabbit antibody raised against whole human platelets. Analysis of autoradiograms developed from dried agarose gels led to the establishment of a normal reference pattern that was consistent for platelets obtained from more than 50 normal individuals. Six platelet membrane glycoprotein antigens contained in four distinguishable precipitates were identified. Each identification was based on direct sodium dodecyl sulfate-polyacrylamide gel electrophoretic analysis of 125I-antigens contained in individually excised precipitates. These platelet antigens include major membrane glycoproteins previously designated la, lb, lla, llb, llla, and lllb. Glycoproteins llb and llla were shown to be contained in a single immunoprecipitate, while glycoproteins la and lla were routinely detected in a single different immunoprecipitate. Analysis of soluble proteins from platelets of five patients with Glanzmann's thrombasthenia demonstrated either a complete absence or a marked reduction of only one radiolabeled precipitate, that containing membrane glycoproteins llb and llla. Platelet samples from two patients with Bernard-Soulier syndrome were devoid of a different precipitate, that containing membrane glycoprotein lb.
journal_name
Bloodjournal_title
Bloodauthors
Kunicki TJ,Nurden AT,Pidard D,Russell NR,Caen JPsubject
Has Abstractpub_date
1981-12-01 00:00:00pages
1190-7issue
6eissn
0006-4971issn
1528-0020journal_volume
58pub_type
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