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  • Title: Effects of chronic clonidine administration on parasympathetic-evoked rat saliva.
    Author: Yu JH.
    Journal: Life Sci; 1992; 51(19):1493-9. PubMed ID: 1279337.
    Abstract:
    Effects of chronic administration of clonidine on parasympathetic-evoked saliva from both parotid and submandibular glands were investigated. Clonidine at 1 mg/kg/day for 5 or 7 days caused a significant reduction in the salivary secretion (flow rate and total volume) evoked by parasympathetic nerve stimulation of parotid but not submandibular glands. Ion concentrations (Na, K and Ca) of parasympathetically nerve-evoked parotid saliva were not altered. However, the total protein concentration as well as output, amylase activity, and output of such saliva were markedly increased. Possible mechanisms for clonidine-induced increase in nerve-elicited salivary protein concentration include release of neuropeptides, and changes in adrenergic receptor binding which need further study.
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