Regulation of 1,25-Dihydroxyvitamin D Synthesis by Intracellular Vitamin D Binding Protein-1
نویسندگان
چکیده
منابع مشابه
Vitamin D Binding Protein and Monocyte Response to 25-Hydroxyvitamin D and 1,25-Dihydroxyvitamin D: Analysis by Mathematical Modeling
Vitamin D binding protein (DBP) plays a key role in the bioavailability of active 1,25-dihydroxyvitamin D (1,25(OH)(2)D) and its precursor 25-hydroxyvitamin D (25OHD), but accurate analysis of DBP-bound and free 25OHD and 1,25(OH)(2)D is difficult. To address this, two new mathematical models were developed to estimate: 1) serum levels of free 25OHD/1,25(OH)(2)D based on DBP concentration and g...
متن کاملVitamin D-binding protein directs monocyte responses to 25-hydroxy- and 1,25-dihydroxyvitamin D.
BACKGROUND Serum 25-hydroxyvitamin D (25OHD) is a key factor in determining monocyte induction of the antimicrobial protein cathelicidin, which requires intracrine conversion of 25OHD to 1,25-dihydroxyvitamin D [1,25(OH)(2)D]. Both vitamin D metabolites circulate bound to vitamin D-binding protein (DBP), but the effect of this on induction of monocyte cathelicidin remains unclear. METHODS Hum...
متن کاملVitamin D Binding Protein and Vitamin D Levels
1 Institute of Metabolism and Endocrinology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China 2 Clinical Research, Diabetes and Endocrinology, Merck Research Laboratories, 126 East Lincoln Avenue, RY34B-148, Rahway, NJ 07065-0900, USA 3Department of Nutritional Science, Rutgers University, New Brunswick, NJ 08901, USA 4Division of Endocrinology, Metabolism an...
متن کاملVitamin D-binding protein prevents vitamin D deficiency and presents vitamin D for its renal activation.
Two mouse models in which the vitamin D-binding protein (DBP) or megalin, a DBP receptor, were knocked out have recently confirmed that DBP is essential for normal vitamin D homeostasis, and have revealed a major pathway for vitamin D activation (1, 2). DBP is also known as the group-specific component of serum (Gc-globulin). It is a highly polymorphic 58 kDa glycoprotein, which has been used a...
متن کاملAlternative splicing of vitamin D-24-hydroxylase: a novel mechanism for the regulation of extrarenal 1,25-dihydroxyvitamin D synthesis.
Synthesis of the active form of vitamin D, 1,25-dihydroxyvitamin D (1,25-(OH)(2)D), by renal epithelial cells is tightly controlled during normal calcium homeostasis. By contrast, macrophage production of 1,25-(OH)(2)D is often dysregulated with potential hypercalcemic complications. We have postulated that this is due to abnormal catabolism of 1,25-(OH)(2)D by the feedback control enzyme, vita...
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ژورنال
عنوان ژورنال: Endocrinology
سال: 2002
ISSN: 0013-7227,1945-7170
DOI: 10.1210/en.2002-220568