Figure 4.
VWF/p.V1316M affects platelet granule release. (A) αIIbβ3 integrin activation measured with JON/A-PE, added 10 minutes after stimulation with ADP (10 μM) and U46619 (5 μM). MFI in stimulated WT platelets (red bars) set as 100%. Red bars, VWD2B(p.V1316M) platelets. (B) Quantification of secreted [3H]serotonin from δ-granules of washed WT and VWD2B(p.V1316M) platelets (red and blue bars, respectively), stimulated or not with PAR4p (1 mM). (C) P-selectin surface expression on PAR4p-stimulated WT and VWD2B(p.V1316M) platelets (red and blue bars, respectively). Data are shown as mean ± SD of 3-17 mice per group. **P ≤ .01; ***P ≤ .001.