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Endocrine abnormalities in human temporal lobe epilepsy.

B B Gallagher

    The Yale Journal of Biology and Medicine
    |March 1, 1987
    PubMed
    Summary
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    Patients with temporal lobe epilepsy show abnormal adrenocorticotropic hormone (ACTH) secretion, which normalizes after temporal lobectomy. This suggests a regulatory defect in the temporal lobe, independent of medication or seizures.

    Area of Science:

    • Neuroendocrinology
    • Epilepsy Research

    Background:

    • Patients with temporal lobe epilepsy (TLE) exhibit altered adrenocorticotropic hormone (ACTH) secretion patterns.
    • The regulation of ACTH secretion in TLE is not fully understood.

    Purpose of the Study:

    • To investigate the regulation of ACTH secretion in patients with TLE.
    • To determine the impact of temporal lobectomy on ACTH secretion.
    • To explore the role of medial temporal lobe structures in ACTH regulation.

    Main Methods:

    • Measured ACTH secretion rates and amounts in patients with TLE and normal subjects.
    • Assessed the effect of temporal lobectomy on ACTH secretion.
    • Utilized electrical stimulation of medial temporal lobe structures.
    • Analyzed the independence of ACTH secretion from anticonvulsant drugs and seizure frequency.

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    Main Results:

    • Patients with TLE secrete ACTH at higher rates and amounts compared to controls.
    • Temporal lobectomy normalized ACTH secretion.
    • ACTH secretion was independent of anticonvulsant drug effects and seizure frequency.
    • Electrical stimulation suggested tonic inhibition regulates ACTH secretion, with a potential defect in TLE.

    Conclusions:

    • Temporal lobe epilepsy is associated with dysregulated ACTH secretion.
    • Temporal lobectomy effectively restores normal ACTH secretion patterns.
    • A defect in the regulatory mechanisms of ACTH secretion within the temporal lobe likely contributes to TLE pathophysiology.