Enhanced disruptive spatial learning effect after sufentanil in renal hypertensive rats versus normotensive rats.
The effects of the peripherally administered sufentanil citrate (S), a potent opioid agonist with high affinity for mu receptors on the spatial navigation task, were tested in normotensive Wistar (NR) and renal hypertensive rats (RHR). Rats were injected subcutaneously once daily in doses of 0.25 or 1 microgram/kg S before the water maze training. In NR rats, weak effects of 0.25 micrograms/kg S and impairments after 1 microgram/kg S were seen, whereas in RHR 0.25 and 1 microgram/kg S showed clearcut impairments. These data from the Morris water maze task support previous reports that RHR have an increased sensitivity for opioid agonists.
Widy-Tyszkiewicz
E
E
Department of Experimental and Clinical Pharmacology, Medical Academy, Warszawa, Poland.
Scheel-Krüger
J
J
Christensen
A V
AV
D000818:Animals; D001143:Arousal / Q000187:drug effects / Q000502:physiology; D001794:Blood Pressure / Q000187:drug effects / Q000502:physiology; D001921:Brain / Q000187:drug effects / Q000502:physiology; D004193:Discrimination Learning / Q000187:drug effects* / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D004723:Endorphins / Q000502:physiology*; D004924:Escape Reaction / Q000187:drug effects* / Q000502:physiology; D006978:Hypertension, Renovascular / Q000503:physiopathology*; D008297:Male; D011939:Mental Recall / Q000187:drug effects* / Q000502:physiology; D009949:Orientation / Q000187:drug effects* / Q000502:physiology; D011340:Problem Solving / Q000187:drug effects / Q000502:physiology; D051381:Rats; D017208:Rats, Wistar; D011930:Reaction Time / Q000187:drug effects / Q000502:physiology; D017409:Sufentanil / Q000494:pharmacology*
D004723:Endorphins; D017409:Sufentanil