FIGURE 4.

Variation of the intra-platelet level of ROS measured by DCF fluorescence. (A) ROS level in resting platelets of diabetic patients (d-PLT) were higher than in resting platelets of healthy subjects (h-PLT). 20-min preincubation with apocynin (APO), diphenyleneiodonium (DPI), or indomethacin (INDO) reduced the levels of ROS produced by d-PLT. (B) PLT stimulation with arachidonic acid increased ROS levels in both h-PLTs and d-PLTs. ∗∗∗p < 0.0001 vs. h-PLT; #p < 0.005, ##p < 0.001 vs. resting d-PLT (paired t-test).