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1α-Hydroxyvitamin D 5 is a chemical derivative of vitamin D 5.The motive to study 1α-hydroxyvitamin D 5 as a potential pharmaceutical drug stemmed from the tendency of calcitriol, a natural metabolite produced in the kidney, to cause toxic hypercalcemia in patients when dosed at concentrations needed to interrupt prostate cancer cells' cycle and stimulate apoptosis.
For example, CYP11A1, an enzyme chiefly known for its role in steroidogenesis, has been found to hydroxylate vitamin D3 at several positions, including C-20, C-22, and C-23, without cleaving the side chain. The resulting metabolites, such as 20-hydroxyvitamin D3 and 20,23-dihydroxyvitamin D3, act as inverse agonists for RORα and RORγ2.
Vitamin D3 needs for the average adult between the ages 19 and 70 years old is 600 IU (15 mcg) per day, says Pelitera. “This includes foods, for example, 1 cup of fortified milk contains about ...
24,25-dihydroxyvitamin D 3 is formed from 25-hydroxyvitamin D 3 by the action of CYP24A1 (25-hydroxyvitamin D3-24-hydroxylase). CYP24A1 appears to be "a multicatalytic enzyme catalyzing most, if not all, of the reactions in the C-24/C-23 pathway of 25-OH-D 3 metabolism."
A 3½-ounce serving of sockeye salmon contains an average of 670 international units (IU) of vitamin D, more than the recommended daily value for a person under age 70, according to the U.S ...
CYP24A1 was identified in the early 1970s and was first thought to be involved in vitamin D metabolism as the renal 25-hydroxyvitamin D3-24-hydroxylase, modifying calcifediol (25-hydroxyvitamin D) to produce 24,25-dihydroxycholecalciferol (24,25-dihydroxyvitamin D).
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walgreens.com has been visited by 10K+ users in the past month
114 W 3rd Ave, Columbus, OH · Directions · (614) 456-1108