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Related Experiment Videos

[Vitamin D3].

M Inaba1, H Morii

  • 1Second Department of Internal Medicine, Osaka City University Medical School.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|December 1, 1992
PubMed
Summary
This summary is machine-generated.

Vitamin D is converted to its active form, 1.25-dihydroxyvitamin D (1.25D), in the kidney. This active form binds to the vitamin D receptor (VDR), influencing gene expression.

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Area of Science:

  • Biochemistry and Molecular Biology
  • Endocrinology
  • Genetics

Context:

  • Vitamin D metabolism involves sequential hydroxylation in the liver and kidney.
  • The hormonal form, 1.25-dihydroxyvitamin D (1.25D), regulates calcium and phosphorus homeostasis.
  • The vitamin D receptor (VDR) is a nuclear receptor belonging to the steroid hormone receptor superfamily.

Purpose:

  • To elucidate the molecular mechanisms of vitamin D action.
  • To understand the interaction between 1.25D, VDR, and DNA.
  • To identify factors involved in VDR-mediated gene regulation.

Summary:

  • Biochemical studies revealed vitamin D's metabolic pathway to its active hormonal form, 1.25D.
  • Molecular biology identified the vitamin D receptor (VDR) and its DNA-binding properties.

Related Experiment Videos

  • VDR, upon binding 1.25D, interacts with DNA via zinc fingers at specific vitamin D response elements (VDREs).
  • Nuclear accessory factors, potentially retinoid X receptor (RXR), are required for VDR-VDRE interaction.

    • Impact:

    • Advances understanding of vitamin D's role in calcium and phosphorus metabolism.
    • Provides insights into the transcriptional regulation by steroid hormone receptors.
    • Highlights the importance of molecular biology tools in deciphering complex biological pathways.