Sertoli cell secretory activities are highly dependent on ion channel functions and critical to spermatogenesis. The steroid hormone 1alpha,25(OH)2-vitamin D3 (1,25(OH)2-D3) stimulates exocytosis in different cell systems by activating a nongenotropic vitamin D receptor (VDR). Here, we described 1,25(OH)2-D3 stimulation of secretion via Cl(-) channel activation in the mouse immature Sertoli cel...

Recent studies indicate the involvement of dopamine receptors D1 and D3 in the regulation of locomotor stimulant and conditioned responses to morphine in mice. Moreover, expression of brain-derived neurotrophic factor (BDNF) may be modulated by D1 and D3 receptor activities in the nucleus accumbens (NAc) and prefrontal cortex (PFC). However, the underlying interactions between D1 and D3 recepto...

Molting activity and innate immunity play a pivotal role in the development growth of crustaceans are related to mortality body abnormality. To evaluate synergistic effect vitamin D3 (vit-D3) Ca molting Chinese mitten crab (Eriocheir sinensis), crabs (3.20 ± 0.01 g) were fed six diets formulated with two levels (0% 1.5%, abbreviated D N) three vit-D3 (0, 9,000 27,000 IU/kg, LVD, MVD HVD) level ...

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...

The pharmacokinetic characteristics of testosterone propionate were studied in normal men after a single im dose of 25 mg testosterone propionate-19,19,19-d3. Plasma levels of testosterone propionate-19,19,19-d3, its active metabolite testosterone-19,19,19-d3, and endogenous testosterone were measured by gas chromatography-mass spectrometry. Testosterone propionate-19,19,19-d3 was gradually tra...

Previous studies using a variety of drugs with different affinities for the dopamine (DA) D3 receptor suggested that this receptor is involved in regulating motor activity and hypothermia. However, the in vivo selectivity of many of these compounds has been repeatedly questioned. To examine the precise roles of the DA D3 receptor in motor activity and hypothermic responses, we used mutant mice ...

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: 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...