Vitamin D: a dynamic molecule. How relevant might the dynamism for a vitamin be?
Nephrology Dialysis Transplantation Volume 31, Issue 1Pp. 23-30.
Sandro Mazzaferro1, sandro.mazzaferro at uniroma1.it and Marzia Pasquali1
1Department of Cardiovascular Respiratory Nephrologic Anesthetic and Geriatric Sciences, Sapienza University of Rome, Rome, Italy
2Nephrology and Dialysis Unit, Policlinico Umberto I Hospital, Rome, Italy
Received June 22, 2015. Accepted August 22, 2015.
Vitamin D has been aound for a lot longer than bones
Perhaps the early role of vitamin D was immune response
See also VitaminDWiki
- Vitamin D history back to Egyptians and fortification - Aug 2011
- More sunshine: more teeth (1862), fewer cavities (1934) – Oct 2011
- Sunshine is a cure for “weak and soft muscles” – 425 BC
- SOLAR ultraviolet radiation and vitamin D: a historical perspective – Aug 2007
- The Healing Sun –1999 book highlights at VitaminDWiki
- Teeth getting worse due to lower level of vitamin D during the past 5,000 years
Cholecalciferol, the precursor of Vitamin D3, is a very old, highly conserved, molecule. Its presence is evident in non-mineralized 750 million-year-old living species, such as plankton. The more active metabolites, a receptor and a D binding protein, appear later, along with the increasing complexity of animal species living in the sea. In the sea, however, the biological function of vitamin D is unlikely to be linked with mineral metabolism, and we can hypothesize a relationship with an immune response. It is in terrestrial animals exhibiting cellular bone that the complexity of vitamin D increases. At this stage of evolution, we see the appearance of bone cells that are capable of producing hormones that regulate and are regulated by vitamin D. This interaction starts a sophisticated metabolic system that modulates both mineral and energy metabolism for the requirements of the musculoskeletal system. Among the so-called pleiotropic effects of vitamin D, those resulting from the inhibitory effect on the renin-angiotensin system are of particular interest for nephrologists. Intriguingly, however, more than for anti-hypertensive effects, this interaction could be relevant for anti-inflammatory actions, possibly representative of a residual ancestral role of vitamin D. In addition, this evolutionary dynamism of the vitamin D system should not be separated from the chemical dynamism that characterizes the ligand molecule and its specific receptor. Both are capable of significant tridimensional modifications that contribute to an increase in the variability and the partial predictability of their final biological effect. A dynamic overview of this system that takes into account its evolutionary and adaptive aspects may be helpful to understand its biological complexity and to envisage why using vitamin D metabolites for therapeutic purposes is still a matter of debate.
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Notes on evolutionary history of Vitamin D after reading the PDF
550 million years ago Vitamin D involved in mineralization of snails etc,
450 million years ago Vitamin D Receptor and Vitamin D Binding Protein
Has a nice chart of Vitamin D-related features vs 100's millions of years
Vast majority of the article deals with the structure of Vitamin D and that of the VDR