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Dengshun Miao et al.
Endocrinology, 145(4), 2046-2053 (2004-01-01)
We have examined the role of PTH in the postnatal state in a mouse model of PTH deficiency generated by targeting the Pth gene in embryonic stem cells. Mice homozygous for the ablated allele, when maintained on a normal calcium
Joanna Wietrzyk et al.
Oncology research, 16(11), 517-525 (2008-03-01)
New vitamin D analogs are interesting candidates for anticancer treatment, including squamous cell carcinomas (SCCs), especially in combination with cytostatics. In order to evaluate the effect of combined application of cisplatin, imatinib, or docetaxel and new vitamin D analogs [PRI-1906:
Kimberly O O'Brien et al.
The American journal of clinical nutrition, 96(1), 64-72 (2012-06-01)
Factors affecting bone calcium deposition across pregnancy and lactation are not well characterized. The impact of maternal age, calcium intake, race-ethnicity, and vitamin D status on the rate of bone calcium deposition (VO+) was assessed across pregnancy and lactation. Stable
D R Zimmerman et al.
Archives of biochemistry and biophysics, 392(1), 14-22 (2001-07-27)
Calcitroic acid (1 alpha-hydroxy-23 carboxy-24,25,26,27-tetranorvitamin D(3)) is known to be the major water-soluble metabolite produced during the deactivation of 1 alpha,25-dihydroxyvitamin D(3). This deactivation process involves a series of oxidation reactions at C(24) and C(23) leading to side-chain cleavage and
Rachael M Biancuzzo et al.
The Journal of clinical endocrinology and metabolism, 98(3), 973-979 (2013-02-07)
The purpose of this study was to determine 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] and 1,25-dihydroxyvitamin D2 [1,25(OH)2D2] levels in healthy adults consuming 1000 IU vitamin D2 or vitamin D3 per day for 11 weeks. Blood from 34 healthy male and female adults
Klára Sochorová et al.
Clinical immunology (Orlando, Fla.), 133(1), 69-77 (2009-08-08)
Paricalcitol (19-nor-1,25/OH(2)/D(2)), a second generation vitamin D receptor (VDR) activator, is a synthetic analogue of vitamin D3. In contrast to calcitriol, paricalcitol has a reduced effect on intestinal calcium resorption thus avoiding undesirable hypercalcemia. Information about immunomodulatory activity of paricalcitol
J L Finch et al.
Journal of the American Society of Nephrology : JASN, 12(7), 1468-1474 (2001-06-26)
19-Nor-1,25-(OH)(2)D(2), an analog of 1,25-(OH)(2)D(3), is used to treat secondary hyperparathyroidism because it suppresses parathyroid hormone synthesis and secretion with lower calcemic and phosphatemic activities. 19-Nor-1,25-(OH)(2)D(2) is approximately 10 times less active than 1,25-(OH)(2)D(3) in promoting bone resorption, which accounts
Shigeaki Kato et al.
Current opinion in nephrology and hypertension, 16(4), 297-304 (2007-06-15)
Vitamin D has diverse biological actions, and consequently the mechanisms behind how it regulates gene transcription are diverse. Unlike its well described positive effects on gene transcription, little is known about how vitamin D induces transcriptional repression. Vitamin D-induced transcriptional
Laura A G Armas et al.
Journal of renal nutrition : the official journal of the Council on Renal Nutrition of the National Kidney Foundation, 21(2), 134-139 (2011-01-18)
The understanding of vitamin D's role in human health has recently expanded. It is now recognized as more than a hormone activated in the kidney only for calcium homeostasis. It is metabolized and used by virtually every cell in the
Frederick G Strathmann et al.
Clinical chemistry, 57(9), 1279-1285 (2011-07-20)
1α,25-dihydroxy vitamin D [1,25(OH)(2)D] is the active metabolite of vitamin D. Antibody-based detection methods lack specificity, but when combined with isotope dilution/ultra-performance liquid chromatography (UPLC)-tandem mass spectrometry, immunoextraction provides an attractive method for 1,25(OH)(2)D. We developed a method for simultaneous
R L Horst et al.
Journal of cellular biochemistry, 88(2), 282-285 (2003-01-10)
1alpha-Hydroxy-23 carboxy-24,25,26,27-tetranorvitamin D(3) (calcitroic acid) is known to be the major water-soluble metabolite produced during the deactivation of 1,25-(OH)(2)D(3). This deactivation process is carried out exclusively by the multicatalytic enzyme CYP24 and involves a series of oxidation reactions at C(24)
Richard J Grostern et al.
Archives of ophthalmology (Chicago, Ill. : 1960), 120(5), 607-612 (2002-05-25)
Although calcitriol (1,25-dihydroxycholecalciferol) and vitamin D(2) inhibit retinoblastoma growth in the athymic (nude) mouse xenograft (Y-79 cell line) model of retinoblastoma, they can cause severe toxicity. To examine the toxicity of and dose-dependent response for the inhibition of tumor growth
Lilian Cuppari et al.
Journal of renal nutrition : the official journal of the Council on Renal Nutrition of the National Kidney Foundation, 21(1), 113-116 (2011-01-05)
Vitamin D was discovered and had its chemical structure described in the early years of the last century. Although classified as a nutrient because it was found in small quantities in butter, it soon became clear that exposure of skin
[Vitamin D metabolites].
Ryo Okazaki
Nihon rinsho. Japanese journal of clinical medicine, 62 Suppl 12, 167-170 (2005-01-22)
Jared P Reis et al.
Atherosclerosis, 207(2), 585-590 (2009-06-23)
Evidence suggests low vitamin D and elevated parathyroid hormone (PTH) concentrations may increase risk for cardiovascular disease. However, little is known about the association between vitamin D or PTH and subclinical atherosclerosis. This cross-sectional study included 654 community-dwelling older adults
Michelle R Denburg et al.
The Journal of clinical endocrinology and metabolism, 98(5), 1930-1938 (2013-04-03)
The relationships among cortical volumetric bone mineral density (CortBMD) and comprehensive measures of mineral metabolism have not been addressed in chronic kidney disease (CKD). The aim of the study was to identify the determinants of CortBMD in childhood CKD. A
G R Goodman et al.
Bone, 28(6), 583-588 (2001-06-27)
Cyclosporine A (CsA), a potent immunosuppressant used in transplantation, induces increased formation with excess resorption in the rat with resultant osteopenia. These findings are confirmed in the human model. Transforming growth factor-beta (TGF-beta) is reported to be involved in the
Jim Bartley
Expert review of anti-infective therapy, 8(12), 1359-1369 (2010-12-08)
In the preantibiotic era, TB of the skin was treated successfully with UV light. By the 1920s, pulmonary TB was being treated with regular sun exposure. During the last decade, basic laboratory research into the antimicrobial actions of vitamin D
G S Hiremath et al.
Multiple sclerosis (Houndmills, Basingstoke, England), 15(6), 735-740 (2009-04-23)
Vitamin D is important for bone health and immune regulation, and has been shown to be low in multiple sclerosis (MS). We sought to determine the effect of over the counter low dose cholecalciferol (LDC) and high dose ergocalciferol (HDE)
Yuki Nagata et al.
Endocrine, 40(2), 315-317 (2011-08-09)
N-terminal propeptide of type I procollagen (PINP) is a marker of newly formed type I collagen. However, its role in hypophosphatemic rickets/osteomalacia has not yet been established. Metabolic bone markers were examined in patients with oncogenic osteomalacia (OOM) and X-linked
Glendon M Zinser et al.
Molecular endocrinology (Baltimore, Md.), 18(9), 2208-2223 (2004-06-05)
The vitamin D receptor (VDR) is present in mammary gland, and VDR ablation is associated with accelerated glandular development during puberty. VDR is a nuclear receptor whose ligand, 1,25-dihydroxyvitamin D [1,25-(OH)(2)D] is generated after metabolic activation of vitamin D by
Joanna Wietrzyk et al.
Cancer chemotherapy and pharmacology, 62(5), 787-797 (2008-01-12)
Active and less toxic vitamin D analogs could be useful for clinical applications. In the present study, we evaluated the toxicity and antitumor effect of two new synthetic analogs of vitamin D, namely PRI-1906 [(24E)-24a-Homo-(1S)-1,25-dihydroxyergocalciferol] and its side-chain unsaturated homo
Ogo Egbuna et al.
American journal of physiology. Renal physiology, 297(3), F720-F728 (2009-05-29)
1Alpha,25(OH)(2) vitamin D(3) [1,25(OH)(2)D(3)] increases serum Ca(2+) concentration in vivo, an action counteracted by activation of the Ca(2+)-sensing receptor (CaSR), which decreases parathyroid hormone (PTH) secretion and increases renal Ca(2+) excretion. Relatively little is known of the role the CaSR
Natasha Khazai et al.
Current rheumatology reports, 10(2), 110-117 (2008-05-08)
Vitamin D is known for its role in calcium homeostasis for optimal skeletal health. It was previously believed that only elderly or hospitalized patients were at risk for vitamin D insufficiency, but many people in the general US population have
R A Henik et al.
Journal of the American Veterinary Medical Association, 215(11), 1644-1649 (2003-10-22)
Rickets was diagnosed in a 1-year-old cat with a history of weakness, osteopenia, and recurrent fractures. Processes causing rickets include vitamin D deficiency caused by inadequate, nutrition, lack of exposure to sunlight, defective metabolism of parent vitamin D to active
Michał Chodyński et al.
Steroids, 67(9), 789-798 (2002-07-19)
A series of analogs of 1,25-dihydroxyergocalciferol (1-4) was synthesized and screened for their antiproliferative activity in vitro. The structure of new analogs was designed based on biological activity of the previously obtained side-chain modified analogs of vitamin D(2) and D(3).
Qing Wang et al.
Journal of cellular biochemistry, 89(6), 1087-1101 (2003-08-05)
Recent studies revealed that the MEK/ERK module of the mitogen-activated protein kinase (MAPK) signaling cascades is up-regulated in the early stages of 1alpha,25-dihydroxyvitamin D(3) (1,25D(3))-induced monocytic differentiation of human leukemia cells HL60. In the present study, we investigated whether another
Sonoko Masuda et al.
Biochimica et biophysica acta, 1761(2), 221-234 (2006-03-07)
While current dogma argues that vitamin D prodrugs require side-chain activation by liver enzymes, recent data suggest that hydroxylation may also occur extrahepatically. We used keratinocytes and recombinant human enzyme to test if the 25-hydroxyvitamin D-24-hydroxylase (CYP24A1) is capable of
M Wiederkehr et al.
Swiss medical weekly, 131(9-10), 127-132 (2001-06-22)
Metabolic acidosis is an important acid-base disturbance in humans. It is characterised by a primary decrease in body bicarbonate stores and is known to induce multiple endocrine and metabolic alterations. Metabolic acidosis induces nitrogen wasting and, in humans, depresses protein
Alexander Ströhle et al.
Inflammation & allergy drug targets, 10(1), 54-63 (2010-12-28)
As elements of the antioxidant system, cofactors of enzymes, components of transcription factors, and epigenetic modulators, micronutrients, such as vitamins and trace elements, influence various metabolic processes that are directly associated with immune functions. Specifically, the vitamins C and D
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