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Behavioural Effects of the Putative Anxiolytic (+/-)-1-(2,5-dimethoxy-4-ethylthiophenyl)-2-Aminoprop

Behavioural Effects of the Putative Anxiolytic (+/-)-1-(2,5-dimethoxy-4-ethylthiophenyl)-2-Aminoprop

  1. Jatelka
    Pharmacology Biochemistry and Behaviour 1996 Jun;54(2):355-61

    Scorza, M.C. ; Reyes-Parada, M. ; Silveira, R. ; Viola, H. ; Medina, J.H. ; Viana, M.B. ; Zangrossi, H. ; Graeff, F.G.

    Abstract
    Behavioral effects of the phenethylamine derivative (+/-)-1-(2,5-dimethoxy-4-ethylthiophenyl)-2-aminopropane (ALEPH-2) were studied in mice and rats. Murine locomotor activity, measured with a photocell actometer, was markedly depressed following IP injection of 2 and 6 mg/kg of the drug. The same doses of the drug also decreased frequency and duration of head dipping and the number of rearings in the hole board apparatus. In the murine elevated plus maze 2 and 6 mg/kg of ALEPH-2 increased the percentage of both open arm entries and time. The total number of entries into the enclosed arms was not significantly affected by the drug. In the rat, 2-12 mg/kg ALEPH-2, IP, decreased photobeam counts in the actometer in a dose-dependent fashion. Both 2 and 4 mg/kg of the drug increased the percentage of open arm entries, but only the highest dose significantly increased the percentage of time spent on the open arms. The dose of 4 mg/kg ALEPH-2 also significantly decreased the total number of enclosed arm entries. Finally, in a recently developed model of anxiety and memory, the elevated T-maze, the doses of 2 and 4 mg/kg ALEPH-2 did not change inhibitory avoidance of the open arms. Nevertheless, the highest dose had an amnestic effect on this task, repeated 72 h later in the absence of drug. In addition, this dose significantly increased the latency to escape from the open arms and had an amnestic effect measured 72 h later. Overall, these results indicate that ALEPH-2 possesses anxiolytic, amnestic as well as sedative and/or motor depressant actions
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