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Related Experiment Videos

Relation between thyroid function and serum levels of long-acting thyroid stimulator.

J C Davis, L J Hipkin, V K Summers

    Acta Endocrinologica
    |July 1, 1975
    PubMed
    Summary
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    Long-acting thyroid stimulator (LATS) levels were measured in patients with thyrotoxicosis and hypopituitarism. Results question LATS

    Area of Science:

    • Endocrinology
    • Thyroid Research
    • Hormone Assays

    Background:

    • Long-acting thyroid stimulator (LATS) is implicated in thyroid disorders.
    • Understanding LATS' role in thyrotoxicosis and other conditions is crucial.

    Purpose of the Study:

    • To investigate LATS bioassay levels in normal controls, thyrotoxic patients, and hypopituitary patients.
    • To assess the correlation between LATS titres and 131-I treatment outcomes in thyrotoxicosis.
    • To explore the presence of LATS in hypopituitary patients.

    Main Methods:

    • Bioassays were conducted on three subject groups: normal controls, thyrotoxic patients (pre- and post-131-I treatment), and hypopituitary patients.
    • Serum LATS levels were measured and analyzed.

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    Main Results:

    • 27.7% of untreated thyrotoxic patients initially showed elevated serum LATS levels.
    • No correlation was found between 131-I treatment relapse rates and LATS titres.
    • Hypopituitary patients exhibited significantly different LATS assay results compared to normal subjects, with some having elevated levels and others low levels possibly due to pseudo LATS deficiency.

    Conclusions:

    • The findings cast doubt on a direct causative role for LATS in the majority of thyrotoxicosis cases.
    • The presence of LATS in hypopituitary patients warrants further investigation.