Waterhouse et al. criticized the association between vitamin D intake and the prevention of pancreatic cancer (1), an association that has been thoroughly reviewed in recent years (2, 3). Yet, randomized controlled clinical trials (RCTs) very rarely produced encouraging and reliable results on the field (4–7). Negative evidence in animal models and experimental studies (8, 9) should suggest tha...

background: dendritic cells (dcs) play a central role in the initiation and expansion of t cell mediated immune responses with potential immunotherapy application. the compounds which have the ability to induce immunomodulatory effects on dcs may be employed for the treatment of immunopathologic conditions such as autoimmune diseases. objective: the aim of this study was to investigate the in v...

The present study was undertaken to investigate the toxic effects of higher doses (1,00,000 IU i.e. 2.5 mg/kg body weight (BW)) of vitamin D3, concomitantly with bacterial endotoxins (lipopolysaccharides: LPS) to study the immunomodulatory potential of vitamin D3 in IBL-80 broiler chicks. The chicks were divided into four groups [group I (NSS), group II (LPS), group III (Vit. D3 + NSS), and gro...

Vitamin D3 is an important vitamin in vertebrates. This fat-soluble vitamin is associated with the regulation of many physiologic processes, most importantly calcium metabolism. The presence or importance of vitamin D3 has been determined in only a handful of invertebrate species. In this study, hemolymph was collected from six wild-caught, subadult goliath birdeater spiders (Theraphosa blondi)...

25-Hydroxy-24-oxovitamin D3 (25(OH)24-oxo-D3), a metabolite of 25-hydroxyvitamin D3, has been chemically synthesized. The ultraviolet, mass, infrared, and proton nuclear magnetic resonance spectra of the 25(OH)24-oxo-D3 were identical with those of the natural product isolated from chick kidney incubates. The oxo compound showed biological activity similar to 24,25-dihydroxyvitamin D3 (24,25(OH...

BACKGROUND Deficiency in Vitamin D3 (cholecalciferol) may predispose to some malignancies, including gonadal tumors and in experimental models vitamin D3 has been proven to inhibit the growth of cancer cells. To learn more about the potential role of vitamin D3 in cancerogenesis, we evaluated the expression and functionality of the vitamin D receptor (VDR) and its role in metastasis of ovarian ...

abstract background and aims: vitamins are essential constituents of our diet that longley have been known to influence the immune system. vitamin d3 and b9 have received particular attention in recent years as these vitamins have been shown to have an unexpected and crucial effect on the immune response. 1, 25(oh)2d3 metabolizing enzymes and vitamin d receptor (vdr) are present in many cell ty...

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).

Human dendritic cells (DC) can be differentiated from blood monocytes in the presence of GM-CSF and IL-4 and matured by lipopolysaccharide (LPS). Vitamin D3 inhibits the maturation of human DC measured by changes in surface expression of HLA-DR, CD14, CD40, CD80, CD83, and CD86. We here examine the function of vitamin D3 during DC maturation. One of the earliest changes to LPS-induced maturatio...