Related Experiment Videos
Rapid actions of vitamin D compounds
1Departmento Biologia, Universidad Nacional del Sur, Bahia Blanca, Argentina.
Journal of Cellular Biochemistry
|May 1, 1992
Summary
Vitamin D compounds exhibit rapid actions across many tissues, involving non-nuclear receptors and membrane effects. Signal transduction pathways like G-protein coupled receptors and calcium channels mediate these effects.
Area of Science:
- Endocrinology and Molecular Biology
- Cellular Signaling Pathways
Background:
- Vitamin D is traditionally known for its genomic effects mediated by nuclear receptors.
- Emerging evidence suggests rapid, non-genomic actions of vitamin D compounds.
Purpose of the Study:
- To survey the rapid actions of vitamin D compounds in diverse target tissues.
- To discuss evidence for non-nuclear receptors and membranophilic effects.
- To consider the signal transduction mechanisms involved in rapid vitamin D actions.
Main Methods:
- Review of existing literature on vitamin D actions in various tissues.
- Analysis of studies investigating non-nuclear receptor involvement.
- Examination of signal transduction pathways activated by vitamin D.
Main Results:
- Rapid vitamin D actions were observed in tissues including intestine, muscle, bone, hepatocytes, kidney, and mammary gland.
- Evidence supports both non-nuclear receptor-mediated and membranophilic effects.
- Signal transduction mechanisms involve Ca2+ channels, phospholipid metabolism, protein kinases, and G-proteins.
Conclusions:
- Vitamin D exerts rapid, diverse effects beyond its classical genomic actions.
- Non-nuclear receptors and membrane interactions are crucial for these rapid responses.
- Understanding these pathways is key to elucidating vitamin D's full physiological role.