No / We examined the influence of S-nitrosoglutathione (GSNO) on alpha(IIb)beta(3) integrin-mediated platelet adhesion to immobilised fibrinogen. GSNO induced a time- and concentration-dependent inhibition of platelet adhesion. Inhibition was cGMP-independent and associated with both reduced platelet spreading and protein tyrosine phosphorylation. To investigate the cGMP-independent effects of NO we evaluated integrin beta(3) phosphorylation. Adhesion to fibrinogen induced rapid phosphorylation of beta(3) on tyrosines 773 and 785, which was reduced by GSNO in a cGMP independent manner. Similar results were observed in suspended platelets indicating that NO-induced effects were independent of spreading-induced signalling. This is the first demonstration that NO directly regulates integrin beta(3) phosphorylation.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/3313 |
| Date | January 2007 |
| Creators | Graham, Anne M, Naseem, Khalid M., Oberprieler, Nikolaus G., Riba, Rocio, Roberts, Wayne, Homer-Vanniasinkam, Shervanthi |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Article, No full-text available in the repository |
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