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Vitamin D3 AND hypercalcemia

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https://www.readbyqxmd.com/read/28345770/effect-of-1-25-oh-2-d3-and-20-oh-d3-on-interleukin-1%C3%AE-stimulated-interleukin-6-and-8-production-by-human-gingival-fibroblasts
#1
V Nakashyan, D A Tipton, A Karydis, R Livada, S H Stein
BACKGROUND AND OBJECTIVE: Vitamin D-1,25(OH)2 D3 or 1,25D3-maintains healthy osseous tissue, stimulates the production of the antimicrobial peptide cathelicidin and has anti-inflammatory effects, but it can cause hypercalcemia. Evidence links diminished serum levels of 1,25D3 with increased gingival inflammation. Periodontitis progression is associated with increased local production of inflammatory mediators by immune cells and gingival fibroblasts. These include interleukin (IL)-6, a regulator of osteoclastic bone resorption, and the neutrophil chemoattractant IL-8, both regulated by signaling pathways, including NF-κB and MAPK/AP-1...
March 27, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28324001/cyp3a4-induction-by-rifampin-an-alternative-pathway-for-vitamin-d-inactivation-in-patients-with-cyp24a1-mutations
#2
Colin Patrick Hawkes, Dong Li, Hakon Hakonarson, Kevin E Meyers, Kenneth Thummel, Michael A Levine
Context: The P450 enzyme CYP24A1 is the principal inactivator of vitamin D metabolites. Biallelic loss-of-function mutations in CYP24A1 are associated with elevated serum levels of 1,25-dihydroxyvitamin D3 with consequent hypercalcemia and hypercalciuria, and represent the most common form of idiopathic infantile hypercalcemia (IIH). Current management strategies for this condition include a low calcium diet, reduced dietary vitamin D intake and limited sunlight exposure. CYP3A4 is a P450 enzyme that inactivates many drugs and xenobiotics and may represent an alternative pathway for inactivation of vitamin D metabolites...
March 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28304097/improved-screening-test-for-idiopathic-infantile-hypercalcemia-confirms-residual-levels-of-serum-24-25-oh-2-d3-in-affected-patients
#3
Martin Kaufmann, Nicole Morse, Billy Joe Molloy, Donald P Cooper, Karl-Peter Schlingmann, Arnaud Molin, Marie Laure Kottler, J Christopher Gallagher, Laura Armas, Glenville Jones
BACKGROUND: CYP24A1 mutations are now accepted as a cause of idiopathic infantile hypercalcemia (IIH). A rapid LC-MS/MS-based blood test enabling measurement of the 25-OH-D3 :24,25-(OH)2 D3 ratio (R) can identify IIH patients on the basis of reduced C24-hydroxylation of 25-OH-D3 by CYP24A1 in vivo. While values of this ratio are significantly elevated in IIH, somewhat surprisingly, serum 24,25-(OH)2 D3 remains detectable. The current study explores possible explanations for this including: residual CYP24A1 enzyme activity in individuals with certain CYP24A1 genotypes, expression of alternative C24-hydroxylases, and the possibility of isobaric contamination of the 24,25-(OH)2 D3 peak on LC-MS/MS...
March 17, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28294593/effect-of-vitamin-d-replacement-in-primary-hyperparathyroidism-with-concurrent-vitamin-d-deficiency-a-systematic-review-and-meta-analysis
#4
Huai Heng Loh, Lee Ling Lim, Anne Yee, Huai Seng Loh, Shireene R Vethakkan
INTRODUCTION: We conducted a meta-analysis to assess the effects of vitamin D replacement on biochemical and skeletal parameters in subjects with mild primary hyperparathyroidism (PHPT) and coexistent vitamin D deficiency. EVIDENCE ACQUISITION: A systematic search of all English-language medical literature published from 1980 till May 2016 using Pubmed, Embase and Ovid was performed. Nine observational studies were evaluated after fulfilling the inclusion and exclusion criteria...
March 14, 2017: Minerva Endocrinologica
https://www.readbyqxmd.com/read/28183335/efficacy-of-vitamin-d3-supplementation-in-reducing-incidence-of-pulmonary-tuberculosis-and-mortality-among-hiv-infected-tanzanian-adults-initiating-antiretroviral-therapy-study-protocol-for-a-randomized-controlled-trial
#5
Christopher R Sudfeld, Ferdinand Mugusi, Said Aboud, Tumaini J Nagu, Molin Wang, Wafaie W Fawzi
BACKGROUND: HIV-infected adults initiating antiretroviral therapy (ART) in sub-Saharan Africa continue to experience high rates of morbidity and mortality during the initial months of treatment. Observational studies in high-income and resource-limited settings indicate that HIV-infected adults with low vitamin D levels may be at increased risk of mortality, HIV disease progression, and incidence of pulmonary tuberculosis (TB). As a result, vitamin D3 supplementation may improve survival and treatment outcomes for HIV-infected adults initiating ART...
February 10, 2017: Trials
https://www.readbyqxmd.com/read/28174131/application-of-vitamin-d-and-vitamin-d-analogs-in-acute-myelogenous-leukemia
#6
REVIEW
Huynh Cao, Yi Xu, Rosalia de Necochea-Campion, David J Baylink, Kimberly J Payne, Xiaolei Tang, Christina Ratanatharathorn, Yong Ji, Saied Mirshahidi, Chien-Shing Chen
Acute myeloid leukemia (AML) is characterized by the accumulation of malignant, transformed immature hematopoietic myeloid precursors that have lost their ability to differentiate and proliferate normally. Current treatment for AML requires intensive cytotoxic chemotherapy and results in significant morbidity and mortality, especially in older patients. Effective and better-tolerated treatment is urgently needed. Studies have shown that 1α,25-dihydroxyvitamin D3 (1,25-D3, active VD3) or vitamin D analogs (VDAs) can potently differentiate AML cells in vitro and ex vivo, which led to early clinical trials in AML and myelodysplastic syndrome patients...
February 4, 2017: Experimental Hematology
https://www.readbyqxmd.com/read/28109821/calcium-pyrophosphate-deposition-disease-revealing-a-hypersensitivity-to-vitamin-d
#7
Pauline Baudart, Arnaud Molin, Johann Cesini, Glenville Jones, Martin Kaufmann, Marie Laure Kottler, Christian Marcelli
OBJECTIVE: Hypersensitivity to vitamin D (HVD) due to a loss of function mutation of the CYP24A1 gene, which encodes vitamin D catabolizing enzyme was initially described as a cause of acute hypercalcemia in children and chronic renal diseases in adults. METHODS: We describe the first case of a patient presenting a calcium pyrophosphate deposition disease (CPDD) revealing a HVD. RESULTS: An abnormality of phospho-calcic metabolism was discovered during the course of an etiological workup for CPDD in a 52-year-old patient...
January 18, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28077342/can-stoss-therapy-be-used-in-children-with-vitamin-d-deficiency-or-insufficiency-without-rickets
#8
Cemil Koçyiğit, Gönül Çatlı, Gülberat İnce, Elif Büşra Özkan, Bumin Nuri Dündar
OBJECTIVE: Stoss treatment has also been suggested due to non-skeletal benefits of vitamin D in adults, but no sufficient data are present about the optimal dose of vitamin D replacement in children with vitamin D deficiency/insufficiency without rickets. This study aimed to compare efficiency/side effects of two different stoss therapy regimens (10.000 IU/kg and 300.000 IU vitamin-D3) administered in children with vitamin D deficiency/insufficiency without rickets. METHODS: Sixty-four children who had vitamin-D deficiency/insufficiency were studied...
January 12, 2017: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/28012936/results-of-daily-oral-dosing-with-up-to-60-000-international-units-iu-of-vitamin-d3-for-2-to-6-years-in-3-adult-males
#9
REVIEW
Patrick McCullough, Jeffrey Amend
In the 1930's and 1940's, vitamin D was reported to be an effective treatment for a number of diseases, including asthma, psoriasis, rheumatoid arthritis, rickets and tuberculosis. High doses were used, 60,000 to 300,000 IU a day for asthma, and 200,000 to 600,000 IU a day for rheumatoid arthritis. Toxicity from hypercalcemia occurred after prolonged oral dosing with these supraphysiologic doses. Assays for measuring vitamin D in the blood were not available, and blood levels of vitamin D associated with hypercalcemia were unknown...
December 21, 2016: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27919743/dual-antiplasmodial-activity-of-vitamin-d3-and-its-analog-22-oxacalcitriol-by-direct-and-indirect-mechanisms
#10
Kiichi Yamamoto, Moritoshi Iwagami, Takenori Seki, Shigeyuki Kano, Nobuo Ota, Manabu Ato
Recent evidence suggests that 1α,25-dihydroxyvitamin D3 (calcitriol, VD3), the active form of vitamin D (VD), can inhibit the proliferation of microorganisms. In the present study, we conducted in vitro experiments and utilized in vivo murine models to investigate the antimalarial activity of VD3 and its analog, 22-oxacalcitriol (22-OCT), which was designed to cause less hypercalcemia than VD3. VD3 and 22-OCT treatments effectively resolved a Plasmodium chabaudi (Pc) infection in wild-type mice. Reduced parasitemia was observed during the acute phase of infection in the presence of VD3 and 22-OCT, followed by a delayed peak during the chronic stage of infection...
April 2017: Parasitology International
https://www.readbyqxmd.com/read/27861708/high-dose-monthly-vitamin-d-for-prevention-of-acute-respiratory-infection-in-older-long-term-care-residents-a-randomized-clinical-trial
#11
Adit A Ginde, Patrick Blatchford, Keith Breese, Lida Zarrabi, Sunny A Linnebur, Jeffrey I Wallace, Robert S Schwartz
OBJECTIVES: To determine the efficacy and safety of high-dose vitamin D supplementation for prevention of acute respiratory infection (ARI) in older long-term care residents. DESIGN: Randomized controlled trial investigating high-dose vs standard-dose vitamin D from 2010 to 2014. SETTING: Colorado long-term care facilities. PARTICIPANTS: Long-term care residents aged 60 and older (n = 107). INTERVENTION: The high-dose group received monthly supplement of vitamin D3 100,000 IU, the standard-dose group received a monthly placebo (for participants taking 400-1,000 IU/d as part of usual care) or a monthly supplement of 12,000 IU of vitamin D3 (for participants taking <400 IU/d as part of usual care)...
March 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/27822674/conversion-of-oral-alfacalcidol-to-oral-calcitriol-in-the-treatment-of-secondary-hyperparathyroidism-in-chronic-hemodialysis-patients
#12
Sandrine Rauscher, Jean-Philippe Lafrance, Vincent Pichette, Robert Z Bell, Katherine Desforges, Laurence Lepage, Georges Ouellet, Denis Ouimet, Martine Leblanc, Caroline Lamarche, Sarah Bezzaoucha, Michel Vallee
PURPOSE: The optimal vitamin D3 therapy for the treatment of secondary hyperparathyroidism (SHPT) in chronic hemodialysis patients is still controversial. Recent studies suggest that uremia in end-stage renal disease is associated with enzymatic hepatic dysfunction altering 25-hydroxylation of vitamin D3. The goal of our study was to compare the efficacy of calcitriol, the fully hydroxylated active form of vitamin D3, to alfacalcidol which needs 25-hydroxylation to be effective, for the treatment of SHPT in chronic hemodialysis patients...
November 8, 2016: International Urology and Nephrology
https://www.readbyqxmd.com/read/27743385/vitamin-d-in-hematological-disorders-and-malignancies
#13
REVIEW
Paige M Kulling, Kristine C Olson, Thomas L Olson, David J Feith, Thomas P Loughran
Commonly known for its critical role in calcium homeostasis and bone mineralization, more recently vitamin D has been implicated in hematological cancer pathogenesis and shows promise as an anti-cancer therapy. Serum levels of 25(OH)D3 , the precursor to the active form of vitamin D, calcitriol, are frequently lower in patients with hematological disease compared to healthy individuals. This often correlates with worse disease outcome. Furthermore, diseased cells typically highly express the vitamin D receptor, which is required for many of the anti-cancer effects observed in multiple in vivo and in vitro cancer models...
March 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/27588937/vitamin-d-mediated-hypercalcemia-mechanisms-diagnosis-and-treatment
#14
Peter J Tebben, Ravinder J Singh, Rajiv Kumar
Hypercalcemia occurs in up to 4% of the population in association with malignancy, primary hyperparathyroidism, ingestion of excessive calcium and/or vitamin D, ectopic production of 1,25-dihydroxyvitamin D [1,25(OH)2D], and impaired degradation of 1,25(OH)2D. The ingestion of excessive amounts of vitamin D3 (or vitamin D2) results in hypercalcemia and hypercalciuria due to the formation of supraphysiological amounts of 25-hydroxyvitamin D [25(OH)D] that bind to the vitamin D receptor, albeit with lower affinity than the active form of the vitamin, 1,25(OH)2D, and the formation of 5,6-trans 25(OH)D, which binds to the vitamin D receptor more tightly than 25(OH)D...
October 2016: Endocrine Reviews
https://www.readbyqxmd.com/read/27515154/an-initial-loading-dose-vitamin-d-versus-placebo-after-hip-fracture-surgery-randomized-trial
#15
Jenson Cs Mak, Rebecca S Mason, Linda Klein, Ian D Cameron
BACKGROUND: Improving vitamin D (25-OHD) status may be an important modifiable factor that could reduce disability severity, fall-rates and mortality associated after hip fracture surgery. Providing a loading-dose post-surgery may overcome limitations in adherence to daily supplementation. METHOD: In this randomized, double-blind, placebo-controlled trial, 218 adults, aged 65-years or older, requiring hip fracture surgery were assigned to receive a single loading-dose of cholecalciferol (250,000 IU vitamin-D3, the REVITAHIP - Replenishment of Vitamin D in Hip Fracture strategy) or placebo, both receiving daily vitamin-D(800 IU) and calcium (500 mg) for 26-weeks...
August 11, 2016: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27510812/renal-failure-in-dogs-kept-by-a-man-with-severe-psoriasis
#16
LETTER
Y Fujita, K Hanazono, E Uchida, T Kawahata, A Suto, K Nakamura, H Shimizu
No abstract text is available yet for this article.
April 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/27484042/the-protective-role-of-vitamin-d3-in-a-murine-model-of-asthma-via-the-suppression-of-tgf-%C3%AE-smad-signaling-and-activation-of-the-nrf2-ho-1-pathway
#17
Zhihui Wang, Haitao Zhang, Xiaohan Sun, Lihong Ren
Asthma is a common worldwide health burden, the prevalence of which is increasing. Recently, the biologically active form of vitamin D3, 1,25-dihydroxyvitamin D3, has been reported to have a protective role in murine asthma; however, the molecular mechanisms by which vitamin D3 attenuates asthma‑associated airway injury remain elusive. In the present study, BALB/c mice were sensitized to ovalbumin (OVA) and were administered 100 ng 1,25-dihydroxyvitamin D3 (intraperitoneal injection) 30 min prior to each airway challenge...
September 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27422380/nanocapsules-with-polyelectrolyte-shell-as-a-platform-for-1-25-dihydroxyvitamin-d3-neuroprotection-study-in-organotypic-hippocampal-slices
#18
Joanna Ślusarczyk, Marek Piotrowski, Krzysztof Szczepanowicz, Magdalena Regulska, Monika Leśkiewicz, Piotr Warszyński, Bogusława Budziszewska, Władysław Lasoń, Agnieszka Basta-Kaim
Calcitriol (1,25-dihydroxyvitamin D3), an active metabolite of vitamin D3, besides the role in calcium and phosphorus metabolism, plays a role in maintaining the functions of the brain. Active forms of vitamin D3 stimulate neurotrophic factors' expression, regulate brain immune processes, and prevent neuronal damage. Therefore, a potential utility of vitamin D3 in a therapy of neurodegenerative disorders should be taken into account. On the other hand, systemic vitamin D3 treatment carries the risk of undesirable effects, e...
July 15, 2016: Neurotoxicity Research
https://www.readbyqxmd.com/read/27408382/rare-occurrence-of-3-h-hypercalcemia-hemolytic-anemia-and-hodgkin-s-lymphoma
#19
Ankur Jain, Pankaj Malhotra, Gaurav Prakash, Subhash Varma, Narender Kumar, Asim Das
Clinicians in hematology practice commonly encounter anemia, hypercalcemia and renal failure, which when present in combination evoke a diagnostic workup for multiple myeloma. We report a 71-years old lady who presented to our hematology clinic with fever and easy fatiguability of 3 months duration and on investigations was found to have anemia and hypercalcemia. Direct Coomb's test characterized the anemia as complement mediated (anti-C3d) hemolysis. Biochemical investigations revealed normal 25(OH) Vitamin D3 and suppressed Parathormone levels and a negative workup for plasma cell dyscrasias, sarcoidosis and autoimmune disorders...
June 2016: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/27366711/prevalence-and-severity-of-disordered-mineral-metabolism-in-patients-with-chronic-kidney-disease-a-study-from-a-tertiary-care-hospital-in-india
#20
Sanjay Vikrant, Anupam Parashar
BACKGROUND: Disordered mineral metabolism is common complications of chronic kidney disease (CKD). However, there are limited data on the pattern of these disturbances in Indian CKD population. MATERIALS AND METHODS: This was a prospective observational study of CKD-mineral and bone disorder (CKD-MBD) over a period of 3 years. The biochemical markers of CKD-MBD, namely, calcium, phosphorus, alkaline phosphatase, intact parathyroid hormone (iPTH), and 25-hydoxyvitamin Vitamin D3 (25OHD), were measured in newly diagnosed CKD Stage 3-5 and prevalent CKD Stage 5D adult patients...
July 2016: Indian Journal of Endocrinology and Metabolism
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