Disabled-2 regulates platelet heterotypic and homotypic aggregation through sulfatide binding
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Here, we show that Dab2 N-PTB binding of sulfatides serves to increase the inhibitory affect of Dab2. Sulfatide stimulation of platelet degranulation can be blocked by the addition of N-PTB. Inhibition of sulfatide induced Î±IIbÎ²3 integrin and P-selectin expression result in decreased platelet-platelet aggregation under flow. N-PTB also blocks sulfatide induced platelet-leukocyte interactions and aggregation. Experimental data supports the hypothesis that Dab2-sulfatide binding serves to increase the inhibition of platelet aggregation.
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