Abstract:
:In response to concanavalin A, cytoplasmic calcium movement was observed in human platelets, both in the presence of 1 mM Ca2+ or 1 mM EGTA in the medium. Concanavalin A also caused the activation of inositide turnover and the production of inositol phosphates, suggesting that activation of phospholipase C occurs. The mechanism by which concanavalin A stimulates phospholipase C does not depend on GTP-binding transducers, because it was not inhibited by GDP beta S, while experiments performed in the presence of cytochalasin B suggested a role for membrane glycoprotein IIb-IIIa-cytoskeleton interaction in this process. Ca(2+)-proteases and Na+/H+ antiport also seemed to be related to concanavalin A-induced phospholipase C activation, as suggested by experiments performed in the presence of leupeptin and amiloride.
journal_name
Cell Biochem Functjournal_title
Cell biochemistry and functionauthors
Torti M,Balduini C,Ramaschi G,Sinigaglia Fdoi
10.1002/cbf.290100109subject
Has Abstractpub_date
1992-03-01 00:00:00pages
53-9issue
1eissn
0263-6484issn
1099-0844journal_volume
10pub_type
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