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  • Title: Parasympathetic non-adrenergic, non-cholinergic-induced protein synthesis and mitogenic activity in rat parotid glands.
    Author: Ekström J, Havel GE, Reinhold A.
    Journal: Exp Physiol; 2000 Mar; 85(2):171-6. PubMed ID: 10751513.
    Abstract:
    Electrical stimulation of the parasympathetic auriculo-temporal nerve (40 Hz, 30 min), in the anaesthetized rat under - and -adrenoceptor blockade, increased [3H]thymidine and [3H]leucine uptake into the parotid glands by 80 and 263 %, respectively. The increase in response to parasympathetic stimulation was almost the same ([3H]thymidine 82 % and [3H]leucine 283 %) when atropine (2 mg kg-1 I.P. or I.V.) was included in the pretreatment. Neither intravenous infusion of vasoactive intestinal peptide (0.5-20 mg kg-1 min-1, 30 min) nor of bethanechol (10 mg kg-1 min-1, 30 min), under adrenoceptor blockade, increased the uptake of [3H]thymidine into the glands. However, these drugs increased [3H]leucine uptake, and in combination they interacted positively. Whereas vasoactive intestinal peptide is likely to be involved in the parasympathetic nerve-evoked protein synthesis, the nature of the non-adrenergic, non-cholinergic component(s) involved in the mitogenic response is presently unknown.
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