Journal
JOURNAL OF THROMBOSIS AND HAEMOSTASIS
Volume 3, Issue 8, Pages 1745-1751Publisher
WILEY
DOI: 10.1111/j.1538-7836.2005.01379.x
Keywords
Ca++ mobilization; GPlb-IX-V; platelets; PLC gamma 2; tyrosine kinases
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Although the signaling pathways related to GPIb-IX-V have not been fully elucidated, an accumulating body of evidence suggests that phospholipase C (PLC)gamma 2 activation, subsequent Ca++ release and oscillations constitute an essential signal transduction pathway related to GPIb-IX-V. Src family kinases are required for PLC gamma 2 activation, while FcR gamma-chain/Fc gamma RIIA may be dispensable for PLC gamma 2 activation. Although PI-3K serves to potentiate various signaling events culminating in alpha(IIb)beta(3) activation, PI-3K activity may be dispensable for Src-PLC gamma 2 activation in GPIb-IX-V-mediated signaling. Glycosphingolipid-enriched microdomains (GEMs) appear to provide platforms for the signal transduction pathway related to GIb-IX-V, as the interaction between GPIb-IX-V and Src or PLC gamma 2 tyrosine phosphorylation occurs exclusively in GEMs.
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