When serum calcium is low, 1,25(OH)2D3and parathyroid hormone (PTH) act to maintain calcium homeostasis. 1,25(OH)2D3—the active form of vitamin D and the ligand for the vitamin D receptor (VDR)—acts to increase calcium absorption from the intestine. If normal calcium is unable to be...
Over the past several years, considerable progress had been made in understanding the basic mechanism of calcium absorption and the role of vitamin D in this process (cf. ref. 1 for earlier review). Physiological studies had demonstrated that vitamin D affected, directly or indirectly, at least...
calcium with vitamin D 其实是钙和维生素按比例配合而成的产品。
Recent studies in our laboratory using calbindin-D 9k null mutant mice as well as mice lacking the 1,25-dihydroxyvitamin D 3 (1,25(OH) 2D 3) inducible epithelial calcium channel TRPV6 provide evidence for calbindin-D 9k and TRPV6 independent regulation of active intestinal calcium absorption....
The major biologic function of vitamin D is to maintain normal blood levels of calcium and phosphorus. Vitamin D aids in the absorption of calcium, helping to form and maintain strong bones. It promotes bone mineralization in concert with a number of other vitamins, minerals, and hormones. With...
support apoptosis (programmed cell death), as well as help to prevent metastases and angiogenesis.2Vitamin D’s role in supporting calcium absorption may also contribute to its ability to fight cancer, since calcium has been shown to decrease proliferation and induce differentiation in epithelial ...
Dihydrotachysterol is a synthetic hydrogenated analog of vitamin D (essential for promoting absorption and utilization of calcium and phosphate, and for normal mineralization of bone). It is currently used in the prevention and treatment of vitamin D deficiency states (e.g. rickets, osteomalacia) ...
Concealment mechanism {16b} The active drugs and placebo will be packed identically (1 blister pack of 4 in boxes of 13 for vitamin D3, 1 blister pack of 30 in boxes of 13 for calcium) and labelled with the trial participant ID. When a new participant is enrolled and given a new ...
Calcium absorption by the rat small intestine is most efficient in the duodenum and least efficient, in the jejunum (Kimberg et al., 1961). Both active and passive transport processes contribute to calcium absorption with active transport accounting for over 75 percent of the duodenum's ability ...
Vitamin D acts to allow increased calcium absorption in the gut. In the parathyroid gland, parathyroid hormone (PTH) is produced to increase calcium absorption from the gut or from our bones if we are not consuming enough calcium in our diet. If we are not consuming enough calcium, osteopenia...