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Vitamine D3

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https://www.readbyqxmd.com/read/28089927/metabolism-of-selective-20-epi-vitamin-d3-analogs-in-rat-osteosarcoma-umr-106-cells-isolation-and-identification-of-four-novel-c-1-fatty-acid-esters-of-1%C3%AE-25-dihydroxy-16-ene-20-epi-vitamin-d3
#1
Caroline Ceailles Flarakos, Andrew Weiskopf, Matthew Robinson, Guoshun Wang, Paul Vouros, Gino J Sasso, Milan R Uskokovic, G Satyanarayana Reddy
Analogs of 1α,25-dihydroxyvitamin D3 (S1) with 20-epi modification (20-epi analogs) possess unique biological properties. We previously reported that 1α,25-dihydroxy-20-epi-vitamin D3 (S2), the basic 20-epi analog is metabolized into less polar metabolites (LPMs) in rat osteosarcoma cells (UMR-106) but not in a perfused rat kidney. Furthermore, we also noted that only selective 20-epi analogs are metabolized into LPMs. For example, 1α,25-dihydroxy-16-ene-20-epi-vitamin D3 (S4), but not 1α,25-dihydroxy-16-ene-23-yne-20-epi-vitamin D3 (S5) is metabolized into LPMs...
January 12, 2017: Steroids
https://www.readbyqxmd.com/read/28089917/micrornas-and-dicer1-are-regulated-by-1-25-dihydroxyvitamin-d-in-prostate-stroma
#2
Shweta Dambal, Angeline A Giangreco, Andres M Acosta, Andrew Fairchild, Zachary Richards, Ryan Deaton, Dennis Wagner, Reinhold Vieth, Peter H Gann, Andre Kajdacsy-Balla, Theodorus Van der Kwast, Larisa Nonn
Vitamin D deficiency increases the risk of lethal prostate adenocarcinomas (PCa) and the majority of older men are deficient. Although PCa arises from the epithelium, the surrounding stroma has hormonal regulatory control over the epithelium and contributes to carcinogenesis. Herein, we describe regulation of microRNAs (miRs) by the active hormone dihydroxyvitamin D (1,25(OH)2D) in human prostate stroma. 1,25(OH)2D binds the vitamin D receptor (VDR) transcription factor to regulate gene expression, including miRs, which have emerged as potent regulators of protein expression...
January 12, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28081498/enhancing-analysis-throughput-sensitivity-and-specificity-in-lc-esi-ms-ms-assay-of-plasma-25-hydroxyvitamin-d3-by-derivatization-with-triplex-4-4-dimethylaminophenyl-1-2-4-triazoline-3-5-dione-daptad-isotopologues
#3
Shoujiro Ogawa, Hiroki Kittaka, Akiho Nakata, Kenji Komatsu, Takahiro Sugiura, Mamoru Satoh, Fumio Nomura, Tatsuya Higashi
The plasma/serum concentration of 25-hydroxyvitamin D3 [25(OH)D3] is a diagnostic index for vitamin D deficiency/insufficiency, which is associated with a wide range of diseases, such as rickets, cancer and diabetes. We have reported that the derivatization with 4-(4-dimethylaminophenyl)-1,2,4-triazoline-3,5-dione (DAPTAD) works well in the liquid chromatography/electrospray ionization-tandem mass spectrometry (LC/ESI-MS/MS) assay of the serum/plasma 25(OH)D3 for enhancing the sensitivity and the separation from a potent interfering metabolite, 3-epi-25-hydroxyvitamin D3 [3-epi-25(OH)D3]...
November 17, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28079136/snp-rs11185644-of-rxra-gene-is-identified-for-dose-response-variability-to-vitamin-d3-supplementation-a-randomized-clinical-trial
#4
Mingzhi Zhang, Lan-Juan Zhao, Yu Zhou, Rhamee Badr, Patrice Watson, An Ye, Boting Zhou, Jigang Zhang, Hong-Wen Deng, Robert R Recker, Joan M Lappe
The level of serum 25-Hydroxyvitamin D [25(OH)D] has high heritability, suggesting that genes may contribute to variations in serum 25(OH)D level and vitamin D dose-response. As vitamin D deficiency has been linked to numerous diseases, understanding how genetic variation contributes to vitamin D dose-response is important for personalized vitamin D treatment and cost-effective disease prevention. To identify genetic variants responsible for vitamin D status and dose-response, we performed two vitamin D3 and calcium clinical supplementation trials in 2,207 postmenopausal Caucasian women...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078844/a-natural-formula-containing-lactoferrin-equisetum-arvensis-soy-isoflavones-and-vitamin-d3-modulates-bone-remodeling-and-inflammatory-markers-in-young-and-aged-rats
#5
L Menghini, C Ferrante, L Leporini, L Recinella, A Chiavaroli, S Leone, G Pintore, M Vacca, G Orlando, L Brunetti
A pivotal role in osteoporosis development is played by radical oxygen species (ROS), the increased production of which is related to inhibited osteoblastic activity and bone formation. A new field of research could involve medicinal plants with antioxidant and protective effects in osteoporosis. Furthermore, considering the multifactorial metabolic aspects of osteoporosis, the pharmacological association of multiple medicinal plants could improve patient response. The aim of the present study is to evaluate in vitro and in vivo the protective effects of a natural formula containing lactoferrin 12%, Equisetum arvensis ES 54%, soy isoflavones 34% and vitamin D3 0...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28077342/can-stoss-therapy-be-used-in-children-with-vitamin-d-deficiency-or-insufficiency-without-rickets
#6
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/28077289/vitamin-d3-protects-against-a%C3%AE-peptide-cytotoxicity-in-differentiated-human-neuroblastoma-sh-sy5y-cells-a-role-for-s1p1-p38mapk-atf4-axis
#7
Federica Pierucci, Mercedes Garcia-Gil, Alessia Frati, Francesca Bini, Maria Martinesi, Eleonora Vannini, Marco Mainardi, Federico Luzzati, Paolo Peretto, Matteo Caleo, Elisabetta Meacci
Besides its classical function of bone metabolism regulation, 1A,25-dihydroxyvitamin D3 (1,25(OH)2D3), acts on a variety of tissues including the nervous system, where the hormone plays an important role as neuroprotective, antiproliferating and differentiating agent. Sphingolipids are bioactive lipids that play critical and complex roles in regulating cell fate. In the present paper we have investigated whether sphingolipids are involved in the protective action of 1,25(OH)2D3. We have found that 1,25(OH)2D3 prevents amyloid-β peptide (Aβ(1-42)) cytotoxicity both in differentiated SH-SY5Y human neuroblastoma cells and in vivo...
January 7, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28074522/protective-effects-of-tacalcitol-against-oxidative-damage-in-human-epidermal-melanocytes
#8
Qi-Lin Li, Yan-Hua Wu, Mu Niu, Xiao-Juan Lu, Yong-Hua Huang, Dan-Hua He
BACKGROUND: Oxidative damage may lead to the dysfunction of melanocytes (MCs) and is one of the causative mechanisms involved in the pathogenesis of vitiligo. OBJECTIVES: This study was designed to investigate the protective effects of the vitamin D3 analog tacalcitol on oxidative damage induced by hydrogen peroxide (H2 O2 ) in human epidermal MCs. METHODS: Human epidermal MCs were cultured and identified by l-DOPA staining and HMB-45 immunohistochemical staining...
February 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28072933/altered-blood-levels-of-vitamin-d-cathelicidin-and-parathyroid-hormone-in-patients-with-sepsis-a-pilot-study
#9
T Greulich, W Regner, M Branscheidt, C Herr, A R Koczulla, C F Vogelmeier, R Bals
It has been recognised that vitamin D (VitD) has a potential role in the regulation of inflammation and protection from infection. In a prospective clinical observational pilot study, we investigated the serum levels of 25-hydroxyvitamin-D3 (25(OH)D3), 1,25-hydroxyvitamin-D3 (1,25(OH)2D3), parathyroid hormone (PTH), and cathelicidin in intensive care unit (ICU) patients with or without systemic inflammatory response syndrome (SIRS). We included 32 patients with SIRS (septic patients), 16 ICU patients without SIRS, and 16 healthy controls...
January 2017: Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/28072801/vitamin-d-supplementation-in-patients-with-chronic-low-back-pain-an-open-label-single-arm-clinical-trial
#10
Babita Ghai, Dipika Bansal, Raju Kanukula, Kapil Gudala, Naresh Sachdeva, Saravdeep Singh Dhatt, Vishal Kumar
BACKGROUND: Vitamin-D deficiency may possibly be related to chronic low back pain (CLBP). OBJECTIVE: The study is aimed to assess the impact of vitamin-D supplementation on pain intensity, functional disability, and vitamin-D levels in patients with CLBP. STUDY DESIGN: Single arm open-label study. SETTING: Outpatient pain clinic of a tertiary care hospital. METHODS: Sixty-eight eligible patients (CLBP for = 3 months, pain score = 50 on visual analogue scale (VAS) and plasma 25-Hydroxyvitamin D3 levels < 30 ng/mL) were enrolled...
January 2017: Pain Physician
https://www.readbyqxmd.com/read/28068581/vitamin-profiles-in-two-free-living-passerine-birds-under-a-metal-pollution-gradient-a-calcium-supplementation-experiment
#11
Sandra R Ruiz, Silvia Espín, Pablo Sánchez-Virosta, Juha-Pekka Salminen, Thomas M Lilley, Tapio Eeva
Vitamin and carotenoid deficiency may impair development in free-living vertebrates, because of the importance of these micronutrients to growth, antioxidant defense and calcium regulation. Micronutrient and calcium insufficiency can be intensified by metal pollution which can interfere with nutrient homeostasis or indirectly reduce food availability. Furthermore, absorption of dietary heavy metals is dependent on food calcium and vitamin levels. We investigated the effect of calcium on plasma vitamin and carotenoid profiles and how these affected growth and survival in two passerine birds with different calcium turnover living along a metal pollution gradient...
January 6, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28067591/association-between-vitamin-d-receptor-polymorphism-and-serum-vitamin-d-levels-in-children-with-low-energy-fractures
#12
Michal Karpiński, Anna Galicka, Robert Milewski, Janusz Popko, Vladimir Badmaev, Sidney J Stohs
OBJECTIVE: Fractures of bones, especially forearm fractures, are very common in children and their number is increasing. This study was designed to determine the impact of vitamin D serum levels and vitamin D receptor (VDR) polymorphisms on the occurrence of low-energy fractures in children. METHODS: The study group consisted of 100 children with clinically relevant bone fractures and a control group consisted of 127 children without fractures. Total vitamin D [25(OH)D3 plus 25(OH)D2] serum concentrations were evaluated in every patient...
January 9, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28065340/enhancing-allergen-presentation-platforms-for-sublingual-immunotherapy
#13
REVIEW
P Moingeon, V Lombardi, V Baron-Bodo, L Mascarell
Sublingual immunotherapy (SLIT) relies on high doses of allergens to treat patients with type I allergies. Although SLIT is commonly performed without any adjuvant or delivery system, allergen(s) could be further formulated with allergen-presentation platforms to better target oral dendritic cells eliciting regulatory immune responses. Improving the availability of allergens to the immune system should enhance SLIT efficacy, while allowing to decrease allergen dosing. Herein, we present an overview of adjuvants and vector systems that have been, or could be, considered as candidate allergen-presentation platforms for the sublingual route...
January 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28065190/cholecalciferol-v-ergocalciferol-for-25-hydroxyvitamin-d-25-oh-d-repletion-in-chronic-kidney-disease-a-randomised-clinical-trial
#14
James B Wetmore, Cassandra Kimber, Jonathan D Mahnken, Jason R Stubbs
Patients with chronic kidney disease (CKD) demonstrate complex mineral metabolism derangements and a high prevalence of vitamin D deficiency. However, the optimal method of 25-hydroxyvitamin D (25(OH)D) repletion is unknown, and trials analysing the comparative efficacy of cholecalciferol and ergocalciferol in this population are lacking. We conducted a randomised clinical trial of cholecalciferol 1250μg (50 000 IU) weekly v. ergocalciferol 1250μg (50 000 IU) weekly for 12 weeks in forty-four non-dialysis-dependent patients with stage 3-5 CKD...
January 9, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28063949/vitamin-d-supplementation-inhibits-oxidative-stress-and-upregulate-sirt1-ampk-glut4-cascade-in-high-glucose-treated-3t3l1-adipocytes-and-in-adipose-tissue-of-high-fat-diet-fed-diabetic-mice
#15
Prasenjit Manna, Arunkumar E Achari, Sushil K Jain
This study examined the hypothesis that vitamin-D prevents oxidative stress and upregulates glucose metabolism via activating insulin-independent signaling molecules in 3T3-L1 adipocytes and in high fat diet (HFD)-fed mice. To investigate the mechanism 3T3L1 adipocytes were treated with high glucose (HG, 25 mM) and 1,25(OH)2D3 (1,25-dihydroxyvitamin D3) (0-50 nM). Results showed that 1,25(OH)2D3 supplementation decreased NOX4 expression, ROS production, NF-κB phosphorylation, and increased the expression of Nrf2 and Trx in HG-treated cells...
January 4, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28063629/the-autoimmune-risk-gene-zmiz1-is-a-vitamin-d-responsive-marker-of-a-molecular-phenotype-of-multiple-sclerosis
#16
N L Fewings, P N Gatt, F C McKay, G P Parnell, S D Schibeci, J Edwards, M A Basuki, A Goldinger, M J Fabis-Pedrini, A G Kermode, C P Manrique, J L McCauley, D Nickles, S E Baranzini, T Burke, S Vucic, G J Stewart, D R Booth
Multiple Sclerosis (MS) is a neurological condition driven in part by immune cells from the peripheral circulation, the targets for current successful therapies. The autoimmune and MS risk gene ZMIZ1 is underexpressed in blood in people with MS. We show that, from three independent sets of transcriptomic data, expression of ZMIZ1 is tightly correlated with that of hundreds of other genes. Further we show expression is partially heritable (heritability 0.26), relatively stable over time, predominantly in plasmacytoid dendritic cells and non-classical monocytes, and that levels of ZMIZ1 protein expression are reduced in MS...
January 4, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28063332/metabolomics-a-potential-way-to-know-the-role-of-vitamin-d-on-multiple-sclerosis
#17
REVIEW
Diego Luque-Córdoba, María D Luque de Castro
The literature about the influence of vitamin D on multiple sclerosis (MS) is very controversial, possibly as a result of the way through which the research on the subject has been conducted. The studies developed so far have been focused exclusively on gene expression: the effect of a given vitamin D metabolite on target receptors. The influence of the vitamin D status (either natural or after supplementation) on MS has been studied by measurement of the 25 monohydroxylated metabolite (also known as circulating form), despite the 1,25 dihydroxylated metabolite is considered the active form...
December 29, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28063200/effects-of-1-25-oh-2-d3-and-vitamin-d-receptor-on-peripheral-cd4-cd8-double-positive-t-lymphocytes-in-a-mouse-model-of-systemic-lupus-erythematosus
#18
Yan Ding, Wang Liao, Xiao-Jie He, Wei Xiang
This study aims to explore effects of 1,25(OH)2 D3 and vitamin D receptor (VDR) on peripheral CD4(+) /CD8(+) double-positive (DP) T lymphocytes in systemic lupus erythematosus (SLE). MRL-LPr/LPr mice with SLE (n = 20) and normal MRL mice (n = 20) were assigned into the control group (normal mice, without feeding with 1,25(OH)2 D3 ), the 1,25(OH)2 D3 group (SLE mice, feeding with 1,25(OH)2 D3 ), the VDR-knock-in + 1,25(OH)2 D3 group (SLE mice, VDR-knock-in, feeding with 1,25(OH)2 D3 ) and the VDR-knockout group (normal mice, VDR-knockout, without feeding with 1,25(OH)2 D3 ) (n = 10 per group)...
January 7, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28063040/a-mouse-model-for-atopic-dermatitis-using-topical-application-of-vitamin-d3-or-of-its-analog-mc903
#19
Verena Moosbrugger-Martinz, Matthias Schmuth, Sandrine Dubrac
Atopic dermatitis (AD) is a chronic relapsing inflammatory skin disease with pruritus and high prevalence. Indeed, 15-30 % of children and 2-10 % of adults from industrialized countries are affected. Acute AD lesions are characterized by epidermal hyperplasia associated with a dominant Th2/Th17 immune response and dermal inflammatory infiltrates. Moreover, the expression of alarmins such as TSLP, IL-33, and IL-25 is upregulated in acute AD lesions. Topical application of vitamin D3 or of its low-calcemic analog MC903 induces changes in skin morphology and inflammation resembling immune perturbations observed in acute lesions of patients with AD...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28058015/vitamin-d-differentially-regulates-salmonella-induced-intestine-epithelial-autophagy-and-interleukin-1%C3%AE-expression
#20
Fu-Chen Huang
AIM: To investigate the effects of active vitamin D3 on autophagy and interleukin (IL)-1β expression in Salmonella-infected intestinal epithelial cells (IECs). METHODS: Caco-2 cells, NOD2 siRNA-, Atg16L1 siRNA- or vitamin D receptor (VDR) siRNA-transfected Caco-2 cells were pretreated with 1,25-dihydroxyvitamin D3 (1,25D3), and then infected by wild-type S. typhimurium strain SL1344. The conversion of LC3-I to LC3-II was detected by Western blot analysis and LC3(+) autophagosome was analyzed by immunofluorescence...
December 21, 2016: World Journal of Gastroenterology: WJG
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