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Studies of hypothalamic function in Huntington's chorea.

P J Lavin, I Bone, P Sheridan

    Journal of Neurology, Neurosurgery, and Psychiatry
    |May 1, 1981
    PubMed
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    Huntington's chorea patients show altered hypothalamic function, with earlier stress hormone responses to low blood sugar. This suggests potential serotoninergic pathway involvement in the disease.

    Area of Science:

    • Neuroendocrinology
    • Neurology

    Background:

    • Huntington's chorea is a neurodegenerative disorder characterized by involuntary movements (chorea).
    • Previous research suggests potential hypothalamic dysfunction in affected individuals.

    Purpose of the Study:

    • To comprehensively assess hypothalamic function in patients with classical Huntington's chorea.
    • To compare neuroendocrine responses between Huntington's chorea patients and healthy controls.

    Main Methods:

    • Utilized insulin tolerance test, thyrotrophin-releasing hormone (TRH) test, gonadotrophin-releasing hormone (GnRH) test, and water deprivation test.
    • Monitored hormonal responses including cortisol, growth hormone, thyroid-stimulating hormone (TSH), prolactin, and antidiuretic hormone (ADH).
    • Assessed clinical response to hypoglycemia and urine concentrating ability.

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    Main Results:

    • Huntington's chorea patients experienced temporary cessation of choreiform movements during insulin tolerance tests.
    • Earlier plasma cortisol and growth hormone responses to hypoglycemia were observed in patients compared to controls.
    • One patient exhibited a delayed TSH response to TRH, indicative of hypothalamic dysfunction, unlike controls.

    Conclusions:

    • The study confirms altered hypothalamic function in Huntington's chorea, particularly in stress hormone regulation.
    • Findings suggest a potential role for serotoninergic, rather than dopaminergic, mechanisms in the observed hypothalamic alterations.
    • Neuroendocrine assessments provide further insight into the complex pathophysiology of Huntington's chorea.