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[Relationship between the decrease in urinary sex-dependent low molecular weight proteins by morphine and hormonal

I Akiba, H Endou, T Suzuki

    Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
    |March 1, 1983
    PubMed
    Summary

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    Chronic morphine use in male rats decreases urinary low molecular weight proteins (LMWP) excretion, likely due to reduced thyroxine levels impacting endocrine function.

    Area of Science:

    • Endocrinology
    • Urology
    • Pharmacology

    Context:

    • Urinary excretion of sex-dependent low molecular weight proteins (LMWP) is influenced by hormonal factors in male rats.
    • Previous studies have not fully elucidated the mechanisms behind morphine's effect on LMWP excretion.

    Purpose:

    • To investigate the relationship between hormonal changes and urinary LMWP excretion in male rats, particularly under chronic morphine administration.
    • To determine the specific hormones involved in regulating LMWP excretion and how morphine affects these pathways.

    Summary:

    • Testosterone and corticosterone influence LMWP excretion, with testosterone showing a more specific effect.
    • Chronic morphine administration in male rats led to decreased LMWP excretion, accompanied by increased testosterone and corticosterone, but decreased thyroxine levels.

    Related Experiment Videos

  • Morphine's effect on LMWP excretion was observed even after castration or adrenalectomy, suggesting a complex interplay of hormonal factors.
  • Thyroxine administration reversed the morphine-induced decrease in LMWP excretion, indicating its crucial role.

    • Impact:

    • This study highlights the significant impact of chronic morphine use on endocrine function and urinary protein excretion.
    • Findings suggest that alterations in thyroxine levels are a key mechanism by which morphine affects LMWP excretion.
    • Provides a basis for understanding potential side effects of chronic opioid use on renal and endocrine systems.