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  • Title: [The role of mu- and delta-opiate receptors in the realization of the autonomic effects of opioid peptides].
    Author: Martynova ER, Medvedev OS.
    Journal: Biull Eksp Biol Med; 1986 Jan; 101(1):60-3. PubMed ID: 3002521.
    Abstract:
    In the first series of experiments on the isolated mouse vas deferens and guinea-pig ileum the capacity of 10 opioid peptides to activate mu- and delta-receptors was evaluated. [DAla2, DLeu5]-enkephalin (DADLE) and [DAla2, MePhe4, Gly5-ol]-enkephalin (DAMPGE) were the most selective agonists of delta- and mu-opiate receptors, respectively. In the second series of experiments on urethan-anesthetized rats it was shown, that intravenous administration of DADLE or DAMPGE (10(-7) M/kg each) elicited hypotension, bradycardia and expiratory apnoe. These effects disappeared both after naloxone injection and bilateral cervical vagotomy. A reflex nature of the vegetative effects of opioid peptides and the role of both mu- and delta-receptors in their realization are suggested.
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