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Vitamine D3

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https://www.readbyqxmd.com/read/29334624/adequate-vitamin-d3-skin-synthesis-versus-erythema-risk-in-the-northern-hemisphere-midlatitudes
#1
Jakub Guzikowski, Janusz Krzyścin, Agnieszka Czerwińska, Weronika Raszewska
Health-optimum-exposure index (HOEI) is proposed to assess if the prescribed amount of vitamin D3 (target value) could be synthesized in the human skin without erythema appearance. It is defined as the ratio between the vitamin D3 quantity received during the maximum allowed outdoor exposure without erythema risk and the target value. Sunbathing is safe for HOEI>1 and 1/HOEI represents a part of minimal erythema dose (MED) necessary to obtain the target value. We examine the following targets: a vitamin D3 quantity equivalent to 1000 IU vitamin D3 taken orally, and an optimal vitamin D3 quantity defined by Krzyścin et al...
January 11, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29331461/stabilizing-vitamin-d3-using-the-molten-globule-state-of-%C3%AE-lactalbumin
#2
Jannik Nedergaard Pedersen, Henrik V Sørensen, Daniel E Otzen
α-Lactalbumin (α-LA) is the second most abundant bovine whey protein. It has been intensively studied because of its readiness to populate the molten globular (MG) state, a partially folded state with native levels of secondary structure but loss of tertiary structure. The MG state of α-LA exposes a significant number of hydrophobic patches that could be used to bind and stabilize small hydrophobic molecules such as vitamin D3 (vitD). Accordingly, we tested the ability of α-LA to stabilize vitD in a pH interval from 7...
January 10, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29330997/comparison-of-different-formulations-of-vitamin-d
#3
Hafiz Muhammad Fahan Rashid, Uneeba Syed, Zaheer Ahmad, Kbaa Khalil Chauhdary, Usman Musharraf, Suresh Kumar
BACKGROUND: Vitamin D Deficiency (VDD) is responsible for a wide spectrum of clinical diseases and vitamin D deficiency prevalence is frightening in most parts of the world including Pakistan. Therefore, supplementations of vitamin D are used in the population at high risk for the prevention and the treatment of vitamin D deficiency. Vitamin D supplementation comes in various formulations both oral and intramuscular. Cholecalciferol is the most commonly used preparation which is given through these routes of administration...
October 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/29326421/vitamin-d3-fortified-milk-did-not-affect-glycemic-control-lipid-profile-and-anthropometric-measures-in-patients-with-type-2-diabetes-a-triple-blind-randomized-clinical-trial
#4
Saedeh Salehi, Fatemeh Sadeghi, Masoumeh Akhlaghi, Mohammad Amin Hanifpour, Mahdi Roshanzamir
BACKGROUND/OBJECTIVES: The effect of vitamin D on glycemic status of diabetes patients is controversial. The objective was to assess the effect of vitamin D3-fortified milk on cardiometabolic markers of patients with type 2 diabetes. SUBJECTS/METHODS: In this randomized triple-blind, placebo-controlled trial, 102 patients (34 males and 68 females) aged 31-74 years with type 2 diabetes were randomized to receive either 250 ml unfortified or 250 ml 1000 IU vitamin D3-fortified milk daily for 9 weeks...
January 11, 2018: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29325695/investigation-of-the-uterine-structural-changes-in-the-experimental-model-with-polycystic-ovary-syndrome-and-effects-of-vitamin-d-treatment-an-ultrastructural-and-immunohistochemical-study
#5
Yurdun Kuyucu, Latife Seyran Çelik, Özge Kendirlinan, Özgül Tap, Ufuk Özgü Mete
In this study, we aimed to investigate the structural changes seen in the endometrium in experimental PCOS rat model and the effects of vitamin D treatment on these changes at immunohistochemical and electron microscopic levels. 24 prepubertal female rats were divided into three groups. Two groups were injected with dehydroepiandrosterone and one of them was treated with 1,25(OH)2 D3 at the same time. The control group was injected with sesame oil. At the end of the 28th day, the blood samples were collected...
January 8, 2018: Reproductive Biology
https://www.readbyqxmd.com/read/29325125/age-phosphorus-and-25-hydroxycholecalciferol-regulate-mrna-expression-of-vitamin-d-receptor-and-sodium-phosphate-cotransporter-in-the-small-intestine-of-broiler-chickens
#6
J C Han, J L Zhang, N Zhang, X Yang, H X Qu, Y Guo, C X Shi, Y F Yan
Four experiments were conducted in this study. Experiment 1 was carried out to examine mRNA expressions of nuclear vitamin D receptor (nVDR), membrane vitamin D receptor (mVDR), and type IIb sodium-phosphate cotransporter (NaPi-IIb) in the small intestine of broiler chickens. Experiments 2, 3, and 4 were implemented to evaluate effects of age, non-phytate phosphorus (NPP), and 25-hydroxycholecalciferol (25-OH-D3) on mRNA expressions of nVDR, mVDR, and NaPi-IIb in the duodenum of chickens. Results showed that mRNA expression levels of nVDR and NaPi-IIb were highest in the duodenum of 21-day-old broilers, lower in the jejunum, and lowest in the ileum...
January 6, 2018: Poultry Science
https://www.readbyqxmd.com/read/29325121/plasma-25-hydroxyvitamin-d-and-mortality-in-patients-with-suspected-stable-angina-pectoris
#7
Eirik Degerud, Ottar Nygård, Stefan de Vogel, Rune Hoff, Gard Frodahl Tveitevåg Svingen, Eva Ringdal Pedersen, Dennis Winston Trygve Nilsen, Jan Erik Nordrehaug, Øivind Midttun, Per Magne Ueland, Jutta Dierkes
Context and objective: Vitamin D status may affect cardiovascular disease (CVD) development and survival. We studied the relationship between concentrations of the circulating biomarker 25-hydroxyvitamin D (25OHD) and all-cause and cardiovascular mortality risk. Design, Setting, Participants and main Outcome Measures: 25OHD, the sum of 25-hydroxyvitamin D3 and 25-hydroxyvitamin D2, was analysed in plasma samples from 4114 Caucasian patients with suspected stable angina pectoris, and adjusted for seasonal variation...
January 9, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29317287/in-vivo-response-of-the-human-epigenome-to-vitamin-d-a-proof-of-principle-study
#8
Carsten Carlberg, Sabine Seuter, Tarja Nurmi, Tomi-Pekka Tuomainen, Jyrki K Virtanen, Antonio Neme
In vitro cell culture studies showed that the hormonal form of vitamin D3, 1α,25-dihydroxyvitamin D3, significantly (p < 0.05) affects the human epigenome at thousands of genomic loci. Phase II of the VitDbol vitamin D intervention trial (NCT02063334) involved a proof-of-principle study of one individual, who was exposed three times every 28 days to an oral bolus (2,000 µg) of vitamin D3. Blood samples were taken directly before each supplementation as well as one and two days after, chromatin was isolated from peripheral blood mononuclear cells without any further in vitro culture and at all nine time points epigenome-wide chromatin accessibility was assessed by applying FAIRE-seq (formaldehyde-assisted isolation of regulatory elements sequencing)...
January 6, 2018: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29316495/vdr-and-gc-gene-polymorphisms-modulate-the-risk-of-lumbar-disc-degeneration-in-iran
#9
Sohail Mashayekhi, Alia Saberi, Zivar Salehi, Gelareh Biazar, Roghayeh Mehrdel
OBJECTIVE: Lumbar disc degeneration (LDD) occurs commonly in humans. Vitamin D metabolic and signaling pathway plays a significant role in intervertebral disc degeneration. The aim of this study was to evaluate the influence of the genetic polymorphism in the two key genes of 1,25-(OH)2-D3 pathway, VDR (vitamin D receptor) and GC (group-specific component), in LDD development. PATIENTS AND METHODS: Two single-nucleotide polymorphisms, VDR rs2228570 (FokI) and GC rs7041, were genotyped in 180 patients with LDD and 230 healthy individuals...
December 29, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29316289/flotation-ultrasound-assisted-microextraction-followed-by-hplc-for-the-determination-of-fat-soluble-vitamins-in-multivitamin-pharmaceutical-preparations
#10
Parvin Shahdousti, Mohammad Aghamohammadi
Dissolved carbon dioxide flotation-emulsification microextraction technique coupled with high-performance liquid chromatography was developed for the separation and determination of fat-soluble vitamins (A, D3 , E and K3 ) in multivitamin pharmaceutical preparations. Dissolved carbon dioxide flotation was used to break up the emulsion of extraction solvent in water and to collect the extraction solvent on the surface of the aqueous sample in the narrowed capillary part of extraction cell. Carbon dioxide bubbles were generated in situ through the addition of 300 μL of concentrated hydrochloric acid into the alkaline sample solution at pH = 11...
January 5, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29310423/phloxine-o-a-cosmetic-colorant-suppresses-the-expression-of-thymic-stromal-lymphopoietin-and-acute-dermatitis-symptoms-in-mice
#11
Hye Eun Lee, Gabsik Yang, Kyu-Bong Kim, Byung-Mu Lee, Joo Young Lee
Cosmetics are primarily applied to the skin; therefore, the association of cosmetic dyes with skin diseases or inflammation is a topic of great interest. Thymic stromal lymphopoietin (TSLP) is an interleukin 7-like cytokine that activates dendritic cells to promote Th2 inflammatory immune responses. TSLP is highly expressed in keratinocytes under inflammatory conditions, which suggests that it may play a critical role in the development of skin diseases, such as atopic dermatitis. Therefore, we investigated whether cosmetic dyes influenced the production of TSLP by keratinocytes...
January 9, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29306481/effect-of-calcifediol-treatment-on-cardiovascular-outcomes-in-patients-with-acute-coronary-syndrome-and-percutaneous-revascularization
#12
Cristina Navarro-Valverde, Jose M Quesada-Gómez, Ramón Pérez-Cano, Ana Fernández-Palacín, Luis F Pastor-Torres
BACKGROUND AND OBJECTIVES: Vitamin D deficiency has been consistently linked with cardiovascular diseases. However, results of intervention studies are contradictory. The aim of this study was to evaluate the effect of treatment with calcifediol (25(OH)D3) on the cardiovascular system of patients with non-ST-elevation acute coronary syndrome after percutaneous coronary intervention. PATIENTS AND METHODS: A prospective study assessing≥60-year-old patients with non-ST-elevation acute coronary syndrome, coronary artery disease and percutaneous revascularisation...
January 3, 2018: Medicina Clínica
https://www.readbyqxmd.com/read/29301117/cooperative-effects-of-q10-vitamin-d3-and-l-arginine-on-cardiac-and-endothelial-cells
#13
Claudio Molinari, Vera Morsanuto, Simona Polli, Francesca Uberti
This work demonstrates the cooperative effect of Q10, vitamin D3, and L-arginine on both cardiac and endothelial cells. The effects of Q10, L-arginine, and vitamin D3 alone or combined on cell viability, nitric oxide, and reactive oxygen species productions in endothelial and cardiac cells were studied. Moreover, the involvement of PI3K/Akt and ERK/MAPK pathways leading to eNOS activation as well as the involvement of vitamin D receptor were also investigated. The same agents were tested in an animal model to verify vasodilation, nitric oxide, and reactive oxygen species production...
January 5, 2018: Journal of Vascular Research
https://www.readbyqxmd.com/read/29298280/complete-objective-response-stable-for-5-years-with-the-di-bella-method-of-multiple-metastatic-carcinoma-of-the-breast
#14
Giuseppe Di Bella, Biagio Colori, Rosilde Toscano
Breast cancer is the most common cancer and the leading cause of cancer death among women. Despite all efforts, about 11,939 deaths and 50,000 new diagnoses for breast cancer were estimated among Italian women in 2016. Therefore new approaches are needed to improve the survival and higher remission rates. We present a case of a woman with carcinoma of the breast and multiple metastases after right mastectomy, axillary dissection, repeated cycles of chemo and radiotherapy, and estrogen block. Biological method formulated by Prof...
December 4, 2017: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/29297816/effects-of-a-light-emitting-diode-on-the-production-of-cholecalciferol-and-associated-blood-parameters-in-the-bearded-dragon-pogona-vitticeps
#15
Lara Cusack, Sam Rivera, Brad Lock, Daniel Benboe, David Brothers, Stephen Divers
The importance of vitamin D3 has been documented in multiple reptile species, with deficiencies resulting in alterations in calcium homeostasis, including nutritional secondary hyperparathyroidism. Though vitamin D3 can be obtained directly from dietary sources or from photobiosynthetic production, species variability in diet and behavior makes exposure to ultraviolet B (UVB) radiation an essential requirement for some diurnal species. The effect of different bulbs to promote synthesis of cholecalciferol (vitamin D3) in the bearded dragon ( Pogona vitticeps) was evaluated...
December 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/29295513/vitamin-d-vitamers-affect-vitamin-d-status-differently-in-young-healthy-males
#16
Jette Jakobsen, Elisabeth Anne Wreford Andersen, Tue Christensen, Rikke Andersen, Susanne Bügel
Dietary intake of vitamin D includes vitamin D3 (vitD3), 25-hydroxyvitamin D3 (25OH-D3), and vitamin D2 (vitD2). However, the bioactivity of the different species has not been scientifically established. The hypothesis in this study was that vitD3, 25OH-D3, and vitD2 have an equal effect on 25-hydroxyvitamin D in serum (vitamin D status). To test our hypothesis, we performed a randomized, crossover study. Twelve young males consumed 10 µg/day vitD3 during a four-week run-in period, followed by 3 × 6 weeks of 10 µg/day vitD3, 10 µg/day 25OH-D3, and 10 µg/day vitD2...
December 23, 2017: Nutrients
https://www.readbyqxmd.com/read/29290431/targeting-antimicrobial-defenses-of-the-udder-through-an-intrinsic-cellular-pathway
#17
Corwin D Nelson, Kathryn E Merriman, Michael B Poindexter, Mercedes F Kweh, Leslie P Blakely
The bovine innate immune system has a strong repertoire of antimicrobial defenses to rapidly attack infectious pathogens that evade physical barriers of the udder. Exploration of the intracrine vitamin D pathway of bovine macrophages has improved understanding of the signals that initiate antimicrobial defenses that protect the udder. In the intracrine vitamin D pathway, pathogen recognition receptors upregulate CYP27B1 mRNA that encodes for the enzyme that converts 25-hydroxyvitamin D [25(OH)D3] to the active vitamin D hormone, 1,25-dihydroxyvitamin D3 [1,25(OH)2D3]...
December 28, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29288250/oxidative-stress-in-critically-ill-ventilated-adults-effects-of-vitamin-d3-and-associations-with-alveolar-macrophage-function
#18
Jenny E Han, Jessica A Alvarez, Bashar Staitieh, Vin Tangpricha, Li Hao, Thomas R Ziegler, Greg S Martin, Lou Ann S Brown
BACKGROUND/OBJECTIVES: Disruptions in redox balance lead to oxidative stress, a promoter of morbidity in critical illness. This study aimed to: (1) characterize the plasma and alveolar thiol/disulfide redox pools, (2) examine their associations with alveolar macrophage phagocytosis, and (3) determine the effect of high dose vitamin D3 on plasma thiol/disulfide redox. SUBJECTS/METHODS: Subjects were 30 critically ill, ventilated adults in a double-blind randomized trial of high-dose (250 000 or 500 000 IU) vitamin D3 or placebo...
December 29, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29287957/novel-vdr-antagonists-based-on-the-gw0742-scaffold
#19
Kelly A Teske, Jonathan W Bogart, Leggy A Arnold
The vitamin D receptor is a nuclear hormone receptor that regulates cell proliferation, cell differentiation and calcium homeostasis. The receptor is endogenously activated by 1,25-dihydroxyvitamin D3, which induces transcription of VDR targets genes regulated by coactivator binding. VDR antagonists and partial agonists have been developed based on the secosteroid scaffold of vitamin D. Only a few non-secosteroid VDR antagonists are known. Herein, we report the rational design of non-secosteroid VDR antagonists using GW0742 as a scaffold...
December 19, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29287794/effect-of-glucocorticoid-treatment-on-baff-and-april-expression-in-patients-with-immune-thrombocytopenia-itp
#20
Julian Kamhieh-Milz, Nuha Ghosoun, Viktor Sterzer, Abdulgabar Salama
Immune thrombocytopenic purpura (ITP) is an idiopathic bleeding disorder. B cell activating factor (BAFF) and 'A proliferation-inducing ligand' (APRIL) have regulatory effects on B and T cells and may represent relevant factors in the pathogenesis of ITP. Serum levels and gene expression were investigated in ITP patients. Both BAFF and APRIL serum levels were significantly elevated in active ITP. However, gene expression analysis revealed both factors to have a tendency toward downregulation. Glucocorticoid treatment significantly reduced BAFF but not APRIL serum levels, which may be mediated by differences in transcription factor binding sites...
December 26, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
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