Abstract:
:A human malignant melanoma cell line (M3Dau) was observed by electron microscopy to interact directly with human platelets and induced platelet aggregation. Fab fragments of a monoclonal antibody MoAb (LYP18), directed against the platelet glycoprotein (GP) IIb-IIIa complex, inhibited platelet-melanoma interactions and platelet-platelet aggregation. M3Dau melanoma cells bind LYP 18 and synthesize IIb-IIIa-like GPs. When the melanoma cells were preincubated with LYP 18, tumor-platelet interaction did not occur, suggesting that the interaction may be mediated by the IIb-IIIa-like GPs present on the melanoma cell surface. Glanzmann's thrombasthenic platelets, lacking GPIIb and IIIa, did not interact with melanoma cells, indicating that the platelet GPIIb-IIIa complex is also necessary for the platelet-melanoma cell interaction. This work demonstrates the importance of the IIb-IIIa-like GPs, present on M3Dau melanoma cells, in mediating tumor-platelet interactions.
journal_name
Bloodjournal_title
Bloodauthors
Boukerche H,Berthier-Vergnes O,Tabone E,Doré JF,Leung LL,McGregor JLsubject
Has Abstractpub_date
1989-08-01 00:00:00pages
658-63issue
2eissn
0006-4971issn
1528-0020journal_volume
74pub_type
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