Thromboxane synthase inhibitor, UK 38485, prevents renal injury in the rabbit isolated perfused kidney exposed to cold ischemia.

Recent studies have indicated that, the administration of thromboxane A2 (TxA2) inhibitors improved renal functions in experimental renal allograft transplantation. Thus TxA2, a vasoconstrictor metabolite of arachidonic acid, may play a role in renal function and blood flow during hypothermic storage. The aim of the present study was to evaluate the cytoprotective effect of TxA2 synthase inhibitor, UK 38485, on altered renal function due to cold ischemia for 24 and 72 h. Experiments were performed in isolated perfused kidney from adult rabbits. Kidneys were perfused with Euro-Collins (EC) containing UK 38485 and incubated with the same solution in a beaker exposed to cold ischemia for 24 and 72 h. The same procedure was applied to the control kidneys in EC solution alone. Vascular responses and urinary output to noradrenaline, angiotensin II, endothelin-1, acetylcholine, and sympathetic stimulation were assessed as the functional activity of kidney. The addition of UK 38485 to EC solution increased the preservation time of kidney and protects the vascular endothelial regulatory functions and urine excretion when compared to EC alone. The results of the present study can be taken as an evidence of the cytoprotective effect of the UK 38485 and might be useful for kidney preservation.