The Vitamin D Analog 1α,25-Dihydroxy-2β-(3-Hydroxypropyloxy) Vitamin D(3) (Eldecalcitol) is a Potent Regulator of Calcium and Phosphate Metabolism.
Summary of "The Vitamin D Analog 1α,25-Dihydroxy-2β-(3-Hydroxypropyloxy) Vitamin D(3) (Eldecalcitol) is a Potent Regulator of Calcium and Phosphate Metabolism."
The vitamin D analog 1α,25-dihydroxy-2β-(3-hydroxypropyloxy)vitamin D(3) (ED-71 or eldecalcitol) has been developed for treatment of osteoporosis, but its effects on mineral metabolism have not been investigated in detail. In the present study, we compared the effects of eldecalcitol and calcitriol on calcium (Ca) and phosphate (Pi) handling in rats. Oral administration of eldecalcitol (0, 7.5, 20, or 50 pmol) q.o.d. for 2 weeks dose-dependently increased ionized Ca, intestinal Ca absorption, and urinary Ca excretion, while these doses of calcitriol had no significant effects. The highest dose of eldecalcitol did not alter serum Pi but stimulated both intestinal Pi absorption and urinary Pi excretion; the latter was attributable, in part, to increased serum FGF-23. The effects of high-dose eldecalcitol on Ca and Pi absorption and urinary excretion and FGF-23 persisted for several days following cessation of treatment. The higher potency of eldecalcitol on Ca and Pi handling was also observed in parathyroidectomized rats infused with PTH, excluding a role for differential regulation of PTH. Direct measurement of duodenal Ca absorption by the in situ loop method confirmed the higher potency of eldecalcitol in this segment via induction of TRPV6. These studies indicated that with chronic administration eldecalcitol is more potent than calcitriol at stimulating intestinal absorption of Ca and Pi, as well as FGF-23. The mechanisms responsible for the higher potency of eldecalcitol are speculated to be its higher vitamin D-binding protein (DBP) affinity and resistance to metabolism.
Renal Division, Washington University School of Medicine, Box 8126, 660 S. Euclid, St. Louis, MO, 63110, USA, email@example.com.
This article was published in the following journal.
Name: Calcified tissue international
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/21912832
- DOI: http://dx.doi.org/10.1007/s00223-011-9528-7
Alphacalcidol and calcitriol have been used as active vitamin D drugs for patients with osteoporosis. In addition, eldecalcitol was recently introduced into clinical practice as a novel active vitamin...
Vitamin D has many physiological functions. First it is a primary regulator of calcium homeostasis. Beyond that, vitamin D and its receptors (VDR) play important role in the immune system, cardiovascu...
As skin cancer is one of the most costly health issues in many countries, particularly in Australia, the possibility that vitamin D compounds might contribute to prevention of this disease is becoming...
The exploration of vitamin D metabolism and function has led to the discovery of active forms of vitamin D that find great usefulness in treating patients with bone disease or renal failure and also p...
Oxidative stress has a role in uremic neuropathy and may be involved in RLS of ESRD patients.Vitamin E &Vitamin C are potential antioxidant supplement that are used in hemodialysis patient...
Vitamin D is available in two forms, vitamin D2 and vitamin D3. It has previously been assumed that these two forms maintain blood vitamin D equally. However, this may not be the case....
The purpose of this study is to answer the following questions: Does vitamin D increase calcium absorption, bone mass and muscle mass and function in women past menopause who have mildly l...
Vitamin D is important to maintain good health. Although it is found in foods and vitamins, many people still have low vitamin D levels. One purpose of this study is to describe vitamin...
This is a preliminary study of oral vitamin D3 supplementation in pregnant and non-pregnant women of reproductive age in Bangladesh. The primary objective of the study is to identify a dos...
Medical and Biotech [MESH] Definitions
A lipid cofactor that is required for normal blood clotting. Several forms of vitamin K have been identified: VITAMIN K 1 (phytomenadione) derived from plants, VITAMIN K 2 (menaquinone) from bacteria, and synthetic naphthoquinone provitamins, VITAMIN K 3 (menadione). Vitamin K 3 provitamins, after being alkylated in vivo, exhibit the antifibrinolytic activity of vitamin K. Green leafy vegetables, liver, cheese, butter, and egg yolk are good sources of vitamin K.
A nutritional condition produced by a deficiency of VITAMIN D in the diet, insufficient production of vitamin D in the skin, inadequate absorption of vitamin D from the diet, or abnormal conversion of vitamin D to its bioactive metabolites. It is manifested clinically as RICKETS in children and OSTEOMALACIA in adults. (From Cecil Textbook of Medicine, 19th ed, p1406)
A family of phylloquinones that contains a ring of 2-methyl-1,4-naphthoquinone and an isoprenoid side chain. Members of this group of vitamin K 1 have only one double bond on the proximal isoprene unit. Rich sources of vitamin K 1 include green plants, algae, and photosynthetic bacteria. Vitamin K1 has antihemorrhagic and prothrombogenic activity.
A nutritional condition produced by a deficiency of VITAMIN E in the diet, characterized by posterior column and spinocerebellar tract abnormalities, areflexia, ophthalmoplegia, and disturbances of gait, proprioception, and vibration. In premature infants vitamin E deficiency is associated with hemolytic anemia, thrombocytosis, edema, intraventricular hemorrhage, and increasing risk of retrolental fibroplasia and bronchopulmonary dysplasia. An apparent inborn error of vitamin E metabolism, named familial isolated vitamin E deficiency, has recently been identified. (Cecil Textbook of Medicine, 19th ed, p1181)
A nutritional condition produced by a deficiency of VITAMIN B 12 in the diet, characterized by megaloblastic anemia. Since vitamin B 12 is not present in plants, humans have obtained their supply from animal products, from multivitamin supplements in the form of pills, and as additives to food preparations. A wide variety of neuropsychiatric abnormalities is also seen in vitamin B 12 deficiency and appears to be due to an undefined defect involving myelin synthesis. (From Cecil Textbook of Medicine, 19th ed, p848)