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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 308 (1979), S. 249-254 
    ISSN: 1432-1912
    Keywords: Prolactin ; Morphine ; Pilocarpine ; β-Endorphin ; Catecholamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The cholinergic agonists, pilocarpine, physostigmine and nicotine, inhibited the prolactin release induced by morphine in male rats in vivo. Pilocarpine also inhibited the release of prolactin induced by β-endorphin or metoclopramide without affecting the basal and haloperidol-stimulated serum prolactin levels. The inhibitory effect of pilocarpine on the morphine-stimulated release of prolactin was antagonized by concurrent administration of atropine but not by atropine methylnitrate or by mecamylamine, while the inhibition by nicotine was antagonized by mecanylamine but not by atropine. The stimulation of prolactin release by morphine and its reversal by pilocarpine were observed after the administration of haloperidol or α-methyltyrosine. These results suggest that the central cholinergic system exerts an inhibitory influence on the prolactin release induced by morphine or β-endorphin and the cholinergic inhibition is not mediated via catecholaminergic neurons.
    Type of Medium: Electronic Resource
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