Anticonflict properties of the dipeptide Litoralon and of diazepam in rats.
1986
: The anticonflict properties of the anxiolytic diazepam and of the dipeptide Litoralon gamma-L-glutamyl-taurine and two of its analogues SZJ 3388, gamma-aminobutyryl-ethanolamine phosphate, and SZJ 3361, D-1-aminoisobutyrylethanolamine phosphate have been investigated in a "time-to-emerge" conflict paradigm in non-deprived rats. Diazepam, Litoralon and compound SZJ 3388 significantly decreased the "time-to-emerge" latency (TTE latency) in a dose-dependent manner versus saline- or vehicle-treated controls in doses between 0.05 and 0.50 mg/kg intraperitoneally. The analogue SZJ 3361 was inactive as regards the TTE latency, while the anti-histaminic promethazine lengthened the TTE latency in a dose-dependent manner. The number of irresolute responses was significantly decreased following administration of diazepam, SZJ 3388 and Litoralon and was positively correlated with the TEE latency-decreasing activity of these compounds. The data are discussed in terms of the benzodiazepine-like anxiolytic or anti-conflict properties of these dipeptides.
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