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    Is serotonin involved in hypothermic effect and its tolerance development of Δ8-tetrahydrocannabinol and 11-hydroxy-Δ8-tetrahydrocannabinol in the mouse?
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    Keywords:
    Tetrahydrocannabinol
    Δ9-tetrahydrocannabinol
    Delta-9-tetrahydrocannabinol
    Dronabinol
    The present study showed the involvement of serotonergic mechanisms in the protective effect of U-50,488H, a selective agonist of kappa-opioid receptors, against glutamate-induced lethality in mice. U-50,488H (1-10 mg/kg, i.p.) protected mice to a significant extent against glutamate-induced lethality, in a dose-related manner. This protective effect was not observed in p-chlorophenylalanine- or methysergide-treated mice. These results suggested that 5-HT in the brain may play an important role in the protective effect of U-50,488H against glutamate-induced lethality.
    Lethality
    Methysergide
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