Effects of streptozocin-induced diabetes on sympathetic and parasympathetic stimulation of parotid salivary gland function in rats.

Diabetes
L C AndersonG B Proctor

Abstract

Diabetes was induced with streptozocin in male Wistar rats. After 4-6 mo, parotid salivary flow was induced by stimulating bipolar electrodes (3-5 V for 2 ms) on either the auriculotemporal nerve (5 Hz) or the cervical sympathetic trunk (10 Hz). During parasympathetic stimulation, flow rates were 443 +/- 287 microliters/30 min in diabetic animals compared to 657 +/- 134 microliters/30 min in controls (P less than .01). Although parotid flow rates during parasympathetic stimulation were well maintained in controls, they decreased rapidly in most diabetic rats. Parotid secretory response to sympathetic stimulation was also reduced in diabetic compared with control animals (40 +/- 16 microliters/30 min and 82 +/- 50 microliters/30 min, respectively, P less than .01). In contrast to results obtained with direct neural stimulation, no differences in threshold dose or total saliva were observed when cholinergic (methacholine) and peptidergic (physalaemin) agonists were administered intravenously. Response threshold for an adrenergic agonist (epinephrine) was significantly increased in diabetes. Electron microscopy showed axoplasmic abnormalities in nonmyelinated axons in diabetic glands but not in control glands. Although most nerve ...Continue Reading

Citations

Aug 1, 2009·Head and Neck Pathology·James GuggenheimerBijan Eghtesad
Sep 1, 1993·Microscopy Research and Technique·J R Garrett, A Kidd
Mar 17, 2017·Journal of Diabetes·Takashi MunemasaTetsuji Nakamoto
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Aug 5, 2021·Cell Biochemistry and Biophysics·André Guaraci DeVito-MoraesCarla Roberta de Oliveira Carvalho

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