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    Pharmacol Biochem Behav. 1993 Oct;46(2):391-5.

    Behavioral effects of the mu-opioid peptide agonists DAMGO, DALDA, and PL017 on locomotor activities.

    Source

    Department of Psychology, University of Florida, Gainesville 32611.

    Abstract

    The relative role of central mu-opioid receptor agonists Tyr-D-Ala-Gly-N-Methyl-Phe-Gly-ol (DAMGO), Tyr-D-Arg-Phe-Lys (DALDA), and Tyr-Pro-MePhe-D-Pro (PL017) (0.00, 0.01, 01, or 1.0 micrograms, ICV) on behavior was investigated in rats for 60 min in activity monitors. DAMGO (0.1 and 1.0 micrograms) and PL017 (1.0 micrograms) resulted in biphasic effects, inhibition followed by hyperactivity for linear locomotor, whereas the 0.01-micrograms dosage was associated with hyperactivity. On the other hand, DALDA (0.1 and 1.0 micrograms) suppressed locomotor activity over the 60-min session.

    PMID:
    8265694
    [PubMed - indexed for MEDLINE]

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