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Selenium and endocrine systems.

Geoffrey J Beckett1, John R Arthur

  • 1Clinical Biochemistry, University of Edinburgh, The Royal Infirmary of Edinburgh, 51 Little France Crescent, Little France, Edinburgh EH16 4SA, Scotland, UK. G.J.Beckett@ed.ac.uk

The Journal of Endocrinology
|March 8, 2005
PubMed
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Selenium (Se) plays a crucial role in endocrine health, influencing thyroid function, male fertility, and insulin signaling. This trace element impacts selenoprotein expression, affecting antioxidant defense and hormone metabolism.

Area of Science:

  • Biochemistry
  • Endocrinology
  • Nutritional Science

Background:

  • Selenium (Se) is an essential trace element that modulates the function of numerous selenoproteins.
  • Key selenoenzymes include glutathione peroxidases (GPXs), thioredoxin reductases (TRs), and iodothyronine deiodinases (Ds), impacting cellular redox status and thyroid hormone metabolism.
  • Se influences cell growth, apoptosis, cell signaling, and transcription factors.

Purpose of the Study:

  • To elucidate the multifaceted roles of selenium in endocrine systems.
  • To highlight selenium's impact on thyroid hormone synthesis and metabolism.
  • To investigate selenium's effects on male fertility and glucose homeostasis.

Main Methods:

  • Analysis of selenoprotein expression and enzyme activity.

Related Experiment Videos

  • Investigation of thyroid hormone deiodination pathways.
  • Assessment of selenium's effects on sperm parameters and glucose control in animal models.

    • Main Results:

    • Selenium up-regulates GPX1, GPX3, TR1, and deiodinases (D1/D2) in thyroid cells, enhancing antioxidant defense and T3 production.
    • GPX3 secreted into the follicular lumen may regulate thyroid hormone synthesis.
    • Selenium is essential for sperm architecture (GPX4) and exhibits insulin-mimetic properties, improving glycemic control and organ function in diabetic rats.

    Conclusions:

    • Selenium is vital for maintaining endocrine health, particularly thyroid function and male reproductive capacity.
    • Selenium's antioxidant and hormone-modulating properties offer therapeutic potential for metabolic and reproductive disorders.
    • Further research into selenium's mechanisms can optimize its use in preventing and treating endocrine-related diseases.