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Reserpinization: effects on parotid gland function.

E Watson, F Dowd, K Jacobson

    Journal of Dental Research
    |February 1, 1984
    PubMed
    Summary
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    Chronic reserpine treatment impaired parotid gland function in mice and rabbits. This led to reduced amylase release and elevated cyclic nucleotide levels, indicating a defect in stimulus-secretion coupling.

    Area of Science:

    • Pharmacology
    • Cellular Biology
    • Physiology

    Background:

    • The parotid gland is crucial for saliva production.
    • Reserpine is a drug known to deplete monoamines.
    • Understanding drug effects on glandular function is important.

    Purpose of the Study:

    • To investigate the impact of chronic reserpine administration on parotid gland function.
    • To examine the effects on stimulated amylase release and intracellular cyclic nucleotide levels.

    Main Methods:

    • Chronic reserpine treatment was administered to mice and rabbits.
    • Cholinergic and beta-adrenergic stimulation were used to assess amylase release.
    • Levels of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) were measured.

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    Main Results:

    • Chronic reserpinization significantly reduced both cholinergic and beta-adrenergic-stimulated amylase release from the parotid gland.
    • Intracellular levels of cAMP and cGMP were significantly elevated in reserpine-treated animals compared to controls.
    • Amylase release induced by dibutyryl-cAMP was also reduced, suggesting a downstream defect.

    Conclusions:

    • Chronic reserpine treatment disrupts parotid gland secretory function.
    • The drug appears to impair stimulus-secretion coupling at a point after cAMP formation.
    • This suggests a complex interaction between reserpine, cyclic nucleotides, and exocrine secretion mechanisms.