Investigation of a possible sensitization development to a challenge dose of ethanol after 2 weeks following the single injection in mice.
In the present study, a possible sensitization development to a single injection of ethanol in mice was investigated. Subjects were adult male Swiss-Webster mice. Ethanol (0.5-4 g/kg) or saline (control) was intraperitoneally injected to mice. Horizontal, vertical and ambulatory locomotor activities were recorded for 30 min immediately following the ethanol or saline injections. After 2 weeks, each group of mice was randomly assigned to two groups. A single challenge dose of ethanol (1 g/kg) was administered to the first group, and saline was injected to the second group. Then, the locomotor activities were recorded for 30 min. In the first experiment, ethanol significantly increased the horizontal and ambulatory activities of the mice at the doses of 0.5 and 1 g/kg, but not at 2 g/kg, while they were decreased at the dose of 4 g/kg. Ethanol (0.5 g/kg) also significantly increased the vertical activity. After 2 weeks, the challenge injection of ethanol (1 g/kg) produced some significant increases in the horizontal and ambulatory activities of the group pretreated with ethanol (2 g/kg). It did not cause any significant change on the locomotor activities of the other three groups treated with lower (stimulant) or higher (depressant) doses of ethanol. In addition, there was no significant difference between locomotor activities of the groups challenged with saline. However, a two-way ANOVA of the data on the challenge injections did not indicate any sensitization development to the effects of ethanol on locomotor activities of the mice. Our results suggest that a locomotor sensitization did not develop to a single injection of ethanol after 2 weeks following the first injection in mice.
Kayir
Hakan
H
Experimental Psychopharmacology Research Unit, Department of Medical Pharmacology, Faculty of Medicine, Gülhane Military Medical Academy, Etlik 06018, Ankara, Turkey.
Uzbay
I Tayfun
IT
D000704:Analysis of Variance; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D002492:Central Nervous System Depressants / Q000008:administration & dosage / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D000431:Ethanol / Q000008:administration & dosage / Q000494:pharmacology*; D008297:Male; D051379:Mice; D009043:Motor Activity / Q000187:drug effects; D013997:Time Factors
D002492:Central Nervous System Depressants; D000431:Ethanol