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Mechanisms of tryptophan (a 5-HT precursor)-induced changes in body temperature were investigated in rats pretreated with pargyline, a monoamine oxidase inhibitor (MAO-I). Tryptophan (100 mg/kg, i.p.) did not affect the body temperature in rats, but it produced significant hypothermia followed by marked hyperthermia and higher mortality in the(More)
The effects of harmaline on tryptophan-induced 5-hydroxytryptamine (5HT) syndrome and body temperature changes in pargyline-pretreated rats were investigated. When administered i.p. 60 min after pargyline treatment (50 mg/kg, i.p.), tryptophan, at 100 mg/kg but not 10 mg/kg, induced the 5-HT syndrome. Tryptophan at 100 mg/kg also produced hypothermia(More)
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