Hemorheological and metabolic consequences of renal ischemia-reperfusion and their modulation by N,N-dimethyl-tryptamine on a rat model
Bidiga, L., Deak, A., Frecska, E., Ghanem, S., Magyar, Z., Mester, A., Nemeth, N., Nemes, B., Peto, K., Somogyi, V., Tanczos, B.
This rodent study investigates the effects of administering DMT in renal ischemia-reperfusion (I/R) injury (robust inflammatory and oxidative stress response to hypoxia and reperfusion which disturbs the organ function) and its hematological (blood-related) and metabolic consequences. It found that DMT could diminish but cannot completely prevent the impairment post the renal I/R.
Abstract
Background: Micro-rheological relations of renal ischemia-reperfusion (I/R) 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 I/R injury.Objective: To investigate the micro-rheological and metabolic parameters, and the effects of DMT in renal I/R in rats.Methods: In anesthetized rats from median laparotomy both kidneys were exposed. In Control group (n = 6) no other intervention happened. In I/R 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 I/R+DMT group (n = 10) DMT was administered 15 minutes before the c. Blood samples were taken before/after ischemia and during the reperfusion for testing hematological, metabolic parameters, erythrocyte deformability and aggregation.Results: 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 I/R+DMT group we found diminished changes compared to the I/R group (lactate, pH, electrolytes, red blood cell deformability and aggregation).Conclusions: Metabolic and micro-rheological parameters impair during renal I/R. DMT could reduce but not completely prevent the changes in this rat model.