Vitamin D, any of a group of fat-soluble vitamins that plays a role in calcium metabolism in animals. The primary source of vitamin D is sunlight exposure, whereby ultraviolet radiation converts sterols present in the skin to vitamin D. Learn more about
Vitamin D is essential to bone and tooth formation, and continued strength of both. Vitamin deficiency causesricketsin children and softening of bones in adults, practically the same disease. Rickets affects all developing bones in children, producing bowed legs, curved spinal column, lumps on the ...
The mechanisms by which vitamin D reduces the risk of cancer are fairly well understood. They includeenhancing calcium absorption, inducing cell differentiation, increasing apoptosis (programmed cell death), reducing metastasis and proliferation, and reducing angiogenesis (formation of new blood vessels)....
Many epidemiological studies have highlighted the link between vitamin D deficiency and schizophrenia. In particular, two prominent studies report an association between neonatal vitamin D deficiency and an increased risk of schizophrenia. In parallel, m
Vitamin D, traditionally known as an essential nutrient, is a precursor of a potent steroid hormone that regulates a broad spectrum of physiological processes. In addition to its classical roles in bone metabolism, epidemiological, preclinical, and cellular research during the last decades, it reveale...
These cells are considered to play an important role during scar formation and fibrogenesis in the liver. The putative descent of FSCs fro... G Ramadori,T Veit,S Schwgler,... - 《Virchows Archiv B Cell Pathology》 被引量: 572发表: 1990年 Vitamin D deficiency causes a selective reduction...
(OH) 2D5] by hydroxylation. The main function of vitamin D is to promote intestinal absorption of calcium and phosphorus, and regulate metabolism of calcium and phosphorus in order to maintain the body's calcium and phosphorus balance. Calcium absorbed from intestinal canal can be transported ...
DBP binds to monomeric actin, thereby preventing the formation of fibrillar actin and obstruction of the microcirculation after extensive tissue damage. View chapterExplore book Vitamin D-Binding Protein Ivy Hurwitz, Nancy E. Cooke, in Encyclopedia of Hormones, 2003 I Introduction Vitamin D-binding ...
and II collagen formation [13]. In addition, Abboud et al. have shown that high levels of vitamin D maintained serum 25-hydroxyvitamin D (25(OH)D) concentration in skeletal muscle cells [14]. Therefore, vitamin D insufficiency and deficiency may play a crucial role in the pathogenesis of ...
The principal source of vitamin D3 for nearly all people is UV-B (290–315 nm) irradiation from direct sunlight, which triggers vitamin D formation in the skin [9]. In modern times humans tend to stay indoors, and while moving outdoors they preferentially cover their large skin surface ...