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  • Title: Effects of monoamine oxidase inhibitors on methamphetamine-induced stereotypy in mice and rats.
    Author: Tatsuta T, Kitanaka N, Kitanaka J, Morita Y, Takemura M.
    Journal: Neurochem Res; 2005 Nov; 30(11):1377-85. PubMed ID: 16341934.
    Abstract:
    In male ICR mice, a single intraperitoneal administration of methamphetamine (METH) (10 mg/kg) induced stereotyped behavior such as continuous sniffing, circling, and nail biting, reaching a plateau level 20 min after the injection. Subcutaneous pretreatment with clorgyline, a monoamine oxidase (MAO)-A inhibitor, at a dose of 0.1 mg/kg 2 h prior to the drug challenge significantly decreased the initial (first 20 min) intensity of stereotypies and increased the latency to onset. The effect was not observed with either higher doses of clorgyline (1 and 10 mg/kg) or l-deprenyl, a MAO-B inhibitor, at doses of 0.1-10 mg/kg. In male Wistar rats, the inhibitory effect of clorgyline on METH-induced stereotypy was not observed. Pretreatment of the mice with clorgyline (0.1 mg/kg) had no effect on apparent serotonin and dopamine turnover in the striatum, although the higher doses of clorgyline (1 and 10 mg/kg) significantly decreased the turnover. These results suggest that a low dose of clorgyline tends to increase the latency and decrease the intensity of stereotypies induced by METH in a dopamine metabolism-independent manner in mice.
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