Hemorheological and metabolic consequences of renal ischemia-reperfusion and their modulation by N,N-dimethyl-tryptamine on a rat model.
Micro-rheological relations of renal ischemia-reperfusion (IR) have not been completely elucidated yet. Concerning anti-inflammatory agents, it is supposed that sigma-1 receptor agonist N,N-dimethyl-tryptamin (DMT) can be useful to reduce IR injury. To investigate the micro-rheological and metabolic parameters, and the effects of DMT in renal IR in rats. In anesthetized rats from median laparotomy both kidneys were exposed. In Control group (n 6) no other intervention happened. In IR group (n 10) the right renal vessels were ligated and after 60 minutes the organ was removed. The left renal vessels were clamped for 60 minutes followed by 120-minute reperfusion. In IRDMT group (n 10) DMT was administered 15 minutes before the ischemia. Blood samples were taken beforeafter ischemia and during the reperfusion for testing hematological, metabolic parameters, erythrocyte deformability and aggregation. Lactate concentration significantly increased and accompanied with decreased blood pH. Enhanced erythrocyte aggregation and impaired deformability were observed from the 30th minute of reperfusion. In IRDMT group we found diminished changes compared to the IR group (lactate, pH, electrolytes, red blood cell deformability and aggregation). Metabolic and micro-rheological parameters impair during renal IR. DMT could reduce but not completely prevent the changes in this rat model.