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Related Experiment Videos

Evolution and function of vitamin D.

Michael F Holick1

  • 1Vitamin D Laboratory, Section of Endocrinology, Diabetes and Nutrition, Department of Medicine, Boston University Medical Center, Boston, MA 02118, USA. mfholick@bu.edu

Recent Results in Cancer Research. Fortschritte Der Krebsforschung. Progres Dans Les Recherches Sur Le Cancer
|August 6, 2003
PubMed
Summary

Vitamin D is crucial for bone health in vertebrates, with deficiency causing osteoporosis and osteomalacia. Emerging research reveals its broader roles in cell growth and immunity, impacting various diseases.

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Area of Science:

  • Endocrinology and Molecular Biology
  • Nutritional Science
  • Dermatology

Background:

  • Phytoplankton and zooplankton have produced vitamin D for over 500 million years.
  • Vitamin D is essential for vertebrate skeletal health, obtained via sunlight or diet.
  • Vitamin D deficiency is a widespread issue, leading to osteoporosis and osteomalacia.

Purpose of the Study:

  • To explore the multifaceted roles of vitamin D beyond skeletal health.
  • To investigate the physiological effects of 1,25-dihydroxyvitamin D (1,25(OH)2D) in various tissues.
  • To understand the implications of vitamin D's functions on chronic diseases and immune modulation.

Main Methods:

  • Review of existing literature on vitamin D metabolism and function.
  • Analysis of the role of 1,25-dihydroxyvitamin D (1,25(OH)2D) and its nuclear receptor (VDR).
Keywords:
Non-programmatic

Related Experiment Videos

  • Exploration of extra-skeletal tissues' capacity to produce 1,25(OH)2D.

    • Main Results:

    • 1,25(OH)2D maintains calcium homeostasis and has widespread physiological effects via the VDR.
    • Many tissues, including colon, breast, and prostate, can synthesize 1,25(OH)2D.
    • New functions of 1,25(OH)2D in regulating cell growth, immunity, and the renin-angiotensin system are recognized.

    Conclusions:

    • Diminished sun exposure correlates with increased risks of cancers, type 1 diabetes, multiple sclerosis, and hypertension.
    • Parathyroid hormone-related peptide (PTHrP) also plays a role in skin health.
    • Understanding vitamin D's diverse functions offers potential for new therapeutic strategies.