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  • Title: Antibodies against platelet membrane glycoproteins. II. Influence on ADP- and collagen-induced platelet aggregation, crossed immunoelectrophoresis studies and relevance to Glanzmann's thrombasthenia.
    Author: Jenkins CS, Ali-Briggs EF, Clemetson KJ.
    Journal: Br J Haematol; 1981 Nov; 49(3):439-47. PubMed ID: 6457625.
    Abstract:
    In Glanzmann's thrombasthenia glycoproteins IIb and IIIa are missing or strongly reduced and aggregation to ADP, collagen and thrombin is impaired. Antibodies against glycoproteins IIb and IIIa did not entirely induce a thrombasthenia-like state in normal platelets. However, they did strongly inhibit collagen-induced aggregation and inhibited the second wave of aggregation induced by ADP. Crossed immunoelectrophoresis studies using Triton X-100 extracts of whole platelets with these antibodies gave a single immunoprecipitate. This immunoprecipitate was absent when similar studies were carried out with thrombasthenic platelets. Platelet antibodies gave a number of immunoprecipitates with normal platelets and differences were observed with thrombasthenic platelets, the most notable of which was a marked reduction in one of the major immunoprecipitates. These results provide further evidence that glycoproteins IIb and IIIa are involved in the latter stages of platelet aggregation.
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