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Gastric secretion.

G Sachs, J G Spenney, W S Rehm

    International Review of Physiology
    |January 1, 1977
    PubMed
    Summary

    Gastric secretion involves cyclic AMP (cAMP) as a second messenger, primarily stimulated by histamine. Metabolism focuses on hexose breakdown via glycolysis and the Krebs

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    Area of Science:

    • Physiology
    • Biochemistry

    Background:

    • Gastric secretion is a complex physiological process involving multiple signaling pathways and metabolic events.
    • Understanding the precise mechanisms of gastric acid production is crucial for treating related disorders.

    Purpose of the Study:

    • To review recent findings on the mechanisms of gastric secretion.
    • To identify potential generalizations in the stimulus, metabolism, and secretory processes.

    Main Methods:

    • Review of existing literature on gastric secretion mechanisms.
    • Analysis of findings related to second messengers, metabolic pathways, and membrane transport.

    Main Results:

    • Amphibian gastric secretion is stimulated by cyclic AMP (cAMP) with histamine as the primary messenger.
    • Metabolic changes involve direct stimulation of hexose catabolism through glycolysis, hexose monophosphate shunt, and Krebs' cycle.
    • Gastric membranes exhibit ATPase activity stimulated by monovalent cations, not ouabain-sensitive, and possess vectorial properties for H+ absorption and Rb+ extrusion.

    Conclusions:

    • While definitive conclusions remain elusive, cAMP and histamine play key roles in amphibian gastric secretion.
    • Hexose metabolism is central to the energy production for secretion in dogs.
    • Gastric mucosal membranes utilize a unique cation-stimulated ATPase for secretion, distinct from typical Na+/K+-ATPase pumps.

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