Abstract
Triflusal is an antiplatelet drug related to aspirin, with different pharmacological properties and a lower haemorrhagic risk. We aimed at comparing their effects on platelet and endothelial activation in type 2 diabetes mellitus (T2DM). In a randomized, double-blind, parallel group study, we compared the effects of three daily regimens (300, 600, and 900 mg) of triflusal, and aspirin (100 mg/day) on urinary 11-dehydro-thromboxane (TX)B 2, index of in vivo platelet activation, ex vivo platelet function using the analyzer PFA-100, plasma von Willebrand factor (vWF), P-selectin, intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), and serum nitrite and nitrate (NO 2 − + NO 3 −) in 60 T2DM patients. Triflusal induced a dose-dependent reduction in 11-dehydro-TXB 2 and a prolongation of closure time in the presence of collagen plus epinephrine (Coll/Epi-CT). The effects of the highest triflusal dose were not different from those of aspirin. The closure time in the presence of collagen plus ADP (Coll/ADP-CT), ICAM-1, VCAM-1, and NO 2 − + NO 3 − were not modified either by triflusal or aspirin. Plasma P-selectin and vWF were reduced by triflusal but not by aspirin. In T2DM triflusal causes a profound inhibition of platelet TXA 2 biosynthesis in vivo, acting on different targets involved in the platelet–endothelial cell interactions.
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