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Medical Science Monitor Basic Research


eISSN: 2329-0358

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Effects of immunosuppressive drugs on platelet aggregation in vitro.

Jolanta Małyszko, Jacek S JS Małyszko, Akikazu A Takada, Michał M Myśliwiec

Ann Transplant 2002; 7(1): 55-68

ID: 5557

Disturbances in platelet functions are found in kidney diseases and may contribute to the progression of atherosclerosis with its thrombotic complications. Kidney allograft recipients are particularly prone to dyslipidemia and have a high risk of cardiovascular death. The purpose of this work was to assess effects of various immunosuppressive drugs on aggregation of platelets obtained from healthy volunteers and chronically hemodialyzed patients. Platelet aggregation in the whole blood and in PRP was induced by collagen (2-microgram/ml whole blood and PRP) arachidonic acid (0.75 mM whole blood and PRP), ADP (10 microM--whole blood and 5 microM--PRP), ristocetin (0.75 mg/ml--whole blood and 1.5 mg/ml--PRP) and was studied after preincubation with clinically relevant concentrations of cyclosporine A, FK 506, 15-deoxyspergualin, azathioprine, mizoribine, mycophenolic acid and mycophenolate mofetil. Preincubation with cyclosporine A resulted in a significant increase in platelet aggregation, whereas preincubation with FK 506, azathioprine, mizoribine, mycophenolic acid and mycophenolate mofetil caused a decrease in platelet aggregation. 15-deoxyspergualin did not affect platelet aggregation. Enhanced platelet aggregation in CSA-treated kidney allograft recipients may have clinical implications in regard to the reported tendency to thrombosis in those patients, and to CSA-induced nephrotoxicity. Thus, inhibition of platelet activity in these patients might be of clinical benefit.

Keywords: Immunosuppressive Agents - pharmacology, Kidney Transplantation, Platelet Aggregation - drug effects, Reference Values, Renal Dialysis, Uremia - blood, Uremia - therapy

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