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Related Experiment Videos

Does cyclic GMP mediate amylase release from mouse parotid acini?

E L Watson, K L Jacobson, F Dowd

    Life Sciences
    |November 8, 1982
    PubMed
    Summary

    Cyclic-GMP (cGMP) mediates cholinergic and partially mediates beta-adrenergic stimulation of amylase release in mouse parotid glands. This second messenger plays a key role in regulating salivary enzyme secretion.

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    Area of Science:

    • Biochemistry
    • Cell Biology
    • Physiology

    Background:

    • Cholinergic and beta-adrenergic agonists stimulate amylase release from mouse parotid acini.
    • The role of intracellular cyclic nucleotides in this process requires further elucidation.

    Purpose of the Study:

    • To investigate the role of cyclic-guanosine monophosphate (cGMP) in mediating amylase release stimulated by cholinergic and beta-adrenergic agonists in mouse parotid acini.

    Main Methods:

    • Measurement of intracellular cyclic-GMP (cGMP) and cyclic-AMP (cAMP) levels.
    • Assessment of amylase release in response to various agonists and modulators.
    • Use of cGMP analogs and phosphodiesterase inhibitors.

    Main Results:

    • Both cholinergic and beta-adrenergic agonists increased intracellular cGMP levels and amylase release.
    • 8-bromo-cGMP mimicked the stimulatory effects on amylase release.
    • cGMP-elevating agents (nitroprusside, hydroxylamine, sodium azide) enhanced amylase release without affecting cAMP levels.
    • A phosphodiesterase inhibitor (MIX) potentiated carbachol-induced cGMP accumulation and amylase release.

    Conclusions:

    • cGMP is suggested to mediate the effects of cholinergic agonists on mouse parotid enzyme secretion.
    • cGMP may also partially mediate the effects of beta-adrenergic agonists on salivary enzyme release.

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