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Adrenal steroids as modulators of nerve cell function.

E R de Kloet

    Journal of Steroid Biochemistry
    |January 1, 1984
    PubMed
    Summary

    Adrenal steroids, like corticosterone, impact nerve cell function through specific brain receptors. Receptor numbers in the hippocampus are sensitive to stress and neurotransmitters, indicating their role in brain health.

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    Area of Science:

    • Neuroendocrinology
    • Cellular Neuroscience
    • Behavioral Neuroscience

    Background:

    • Adrenal steroids influence nerve cell function, with some actions mediated by intracellular receptors.
    • Receptor systems in the rat brain exhibit heterogeneity, particularly in limbic regions.

    Purpose of the Study:

    • To investigate the role of corticosterone receptors in hippocampal neurons.
    • To understand how receptor number and function relate to behavior and neurotransmission.

    Main Methods:

    • Studied corticosterone receptor system in rat hippocampal neurons.
    • Examined effects of adrenalectomy and corticosterone replacement on behavior and serotonin.
    • Investigated factors influencing hippocampal corticosterone receptor number.

    Main Results:

    • Hippocampal neurons possess a specific corticosterone receptor system.
    • Corticosterone replacement restored behavior and serotonin levels after adrenalectomy.
    • Receptor number is reduced by chronic stress or high corticosterone doses but can be restored by serotonin and neuropeptides.

    Conclusions:

    • The corticosterone receptor system in the hippocampus mediates steroid actions on nerve cells.
    • Hippocampal corticosterone receptor number is a sensitive indicator of brain function.
    • Neural and endocrine factors regulate receptor capacity, influencing brain responsiveness.

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