Efficiency of platelet aggregation with different sensitivity of cyclooxygenase to non-steroid anti-inflammatory drugs in patients with nephrolithiasis

Objective: to establish the dependence of thrombocyte (Tc) aggregation efficiency on crosstalk-signaling pathways associated with stimulation of TR-receptor and purine P2-receptors, with different cyclooxygenase (COX) activity against the background of non-steroidal anti-inflammatory drugs (NSAIDs) administration in patients with nephrolithiasis (NLT). Material and methods . The study was prospective and included 60 patients with NLT who received non-steroid anti-inflammatory drugs (NSAIDs) for analgesia as part of lithokinetic therapy (LKT). The cohort of patients was divided into two groups, with effective (group 1, n=30) and ineffective (group 2, n=30) COX inhibition. The activity of TP receptors, purine P2 receptors (P2X1 and P2Y receptors) of platelets was assessed on a ChronoLog analyzer (USA). Agonists (ATP, ADP and Arachidonic acid) were used at EC50 and EC10 concentrations. Results . In the 1st group, after 72 hours of LCT, the activity of the TR receptor, P2 receptors of Tc decreased to the level of hyporeactivity. The regulation of the compensatory reaction of Tc in response to hematuria was provided through the synergism of the P2 receptors, and the TP receptor and the P2X1 receptor. In 2nd group hyperreactivity of the TP receptor and P2 receptors persisted. Optimal modulation of the compensatory reaction of Tc was provided by the synergism of the TP receptor and P2Y receptors.