1. The term vitamin D is used for a range of closely related steroid compounds which possess the property of preventing or curing vitamin D deficiency. These include alfacalcidol (1α-hydroxyvitamin D3), calcifediol (25-hydroxyvitamin D3), calcitriol (1α,25 dihydroxy-vitamin D3), cholecalciferol (vitamin D3), dihydrotachysterol and ergocalciferol (vitamin D2 or calciferol). In veterinary medicin...

To evaluate the role of vitamin D3 during gestation and lactation of sows, 2 independent experiments were performed with the aim of investigating sow reproductive performance, milk composition (study 1 only), and changes in blood status of 25-hydroxycholecalciferol (25-OH-D3), 1,25-dihydroxycholecalciferol (1,25-(OH)2-D3; study 2 only), minerals, and bone markers of sows during gestation and la...

The absorption of simultaneously administered equimolar doses of 14C vitamin D3 and 3H 25 hydroxyvitamin D3 (25-OH-D3) has been studied in controls and patients with a variety of gastrointestinal disorders. As assessed from peak radioactivity in the serum and from faecal excretion of radioactivity, malabsorption of both vitamin D3 and 25-OH-D3 occurred in patients with steatorrhoea. Malabsorpti...

1,25-Dihydroxyvitamin D3 is believed to mediate the regulation of calcium metabolism by a steroid hormone receptor mechanism. We now demonstrate that phosphorylation of the 1,25-dihydroxyvitamin D3 receptor occurs rapidly in embryonic chick duodenal organ culture in response to 1,25-dihydroxyvitamin D3. Phosphorylation of the receptor is strongly induced within 1 h by 1,25-dihydroxyvitamin D3 a...

We describe a patient with early diagnosed cystinosis who presented with nephrogenic diabetes insipidus in addition to proximal tubular dysfunction. Another feature in this patient was abnormally low serum concentration of 24,25 dihydroxy vitamin D3 (24,25(OH)2D3) with normal 25 hydroxy vitamin D3 (25(OH)D3) and relatively low 1,25 dihydroxy vitamin D3 (1,25(OH)2D3).

this study aimed to estimate microsatellite based genetic diversity in two lines (the selected rirs and control line rirc) of rhode island red (rir) chicken. genomic dna of 24 randomly selected birds maintained at central avian research institute (india) and 24 microsatellite markers were used. microsatellite alleles were determined on 6% urea-page, recorded using geldoc system and the samples ...

INTRODUCTION Incomplete human extravillous trophoblast (EVT) invasion of the decidua and maternal spiral arteries is characteristic of pre-eclampsia, a condition linked to low maternal vitamin D status. It is hypothesized that dysregulated vitamin D action in uteroplacental tissues disrupts EVT invasion leading to malplacentation. METHODS This study assessed the effects of the active vitamin ...