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Vitamin B 1

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https://www.readbyqxmd.com/read/28719693/effect-of-high-dose-vs-standard-dose-wintertime-vitamin-d-supplementation-on-viral-upper-respiratory-tract-infections-in-young-healthy-children
#1
Mary Aglipay, Catherine S Birken, Patricia C Parkin, Mark B Loeb, Kevin Thorpe, Yang Chen, Andreas Laupacis, Muhammad Mamdani, Colin Macarthur, Jeffrey S Hoch, Tony Mazzulli, Jonathon L Maguire
Importance: Epidemiological studies support a link between low 25-hydroxyvitamin D levels and a higher risk of viral upper respiratory tract infections. However, whether winter supplementation of vitamin D reduces the risk among children is unknown. Objective: To determine whether high-dose vs standard-dose vitamin D supplementation reduces the incidence of wintertime upper respiratory tract infections in young children. Design, Setting, and Participants: A randomized clinical trial was conducted during the winter months between September 13, 2011, and June 30, 2015, among children aged 1 through 5 years enrolled in TARGet Kids!, a multisite primary care practice-based research network in Toronto, Ontario, Canada...
July 18, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28717807/vitamin-d-status-and-prevalent-early-age-related-macular-degeneration-in-african-americans-and-caucasians-the-atherosclerosis-risk-in-communities-aric-study
#2
A E Millen, J Nie, M W Sahli, J A Mares, K J Meyers, B E K Klein, M J LaMonte, P L Lutsey, C A Andrews, R Klein
OBJECTIVES: Vitamin D status has been hypothesized to protect against development of early age-related macular degeneration (AMD) via its anti-inflammatory properties and its possible beneficial influence on blood pressure control. We investigated the association between vitamin D status and prevalent early AMD in a community-based cohort. DESIGN: This was a cross-sectional study. SETTING: This was a secondary data analysis of already existing data from the Atherosclerosis Risk in Communities Study (ARIC) cohort collected from 1990 to 1995...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28716079/the-human-jejunum-has-an-endogenous-microbiota-that-differs-from-those-in-the-oral-cavity-and-colon
#3
Olof H Sundin, Antonio Mendoza-Ladd, Mingtao Zeng, Diana Diaz-Arévalo, Elisa Morales, B Matthew Fagan, Javier Ordoñez, Philip Velez, Nishaal Antony, Richard W McCallum
BACKGROUND: The upper half of the human small intestine, known as the jejunum, is the primary site for absorption of nutrient-derived carbohydrates, amino acids, small peptides, and vitamins. In contrast to the colon, which contains 10(11)-10(12) colony forming units of bacteria per ml (CFU/ml), the normal jejunum generally ranges from 10(3) to 10(5) CFU per ml. Because invasive procedures are required to access the jejunum, much less is known about its bacterial microbiota. Bacteria inhabiting the jejunal lumen have been investigated by classical culture techniques, but not by culture-independent metagenomics...
July 17, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28712921/selective-regulation-of-biological-processes-by-vitamin-d-based-on-the-spatio-temporal-cistrome-of-its-receptor
#4
Antonio Neme, Sabine Seuter, Carsten Carlberg
The transcription factor vitamin D receptor (VDR) is the exclusive nuclear target of the biologically active form of vitamin D (1,25(OH)2D3). In THP-1 human monocytes we obtained a highly accurate VDR cistrome after 2 and 24 h ligand stimulation comprising more than 11,600 genomic loci, 78% of which were detected exclusively after 24 h. In contrast, a group of 510 persistent VDR sites occurred at all conditions and some 2,100 VDR loci were only transiently occupied. Machine learning and statistical analysis as well as a comparison with the re-analyzed B cell VDR cistrome indicated a subgroup of 339 highly conserved persistent VDR sites that were suited best for describing vitamin D-triggered gene regulatory scenarios...
July 13, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28706201/genotypic-variability-based-association-identifies-novel-non-additive-loci-dhcr7-and-irf4-in-sero-negative-rheumatoid-arthritis
#5
Wen-Hua Wei, Sebastien Viatte, Tony R Merriman, Anne Barton, Jane Worthington
Sero-negative rheumatoid arthritis (RA) is a highly heterogeneous disorder with only a few additive loci identified to date. We report a genotypic variability-based genome-wide association study (vGWAS) of six cohorts of sero-negative RA recruited in Europe and the US that were genotyped with the Immunochip. A two-stage approach was used: (1) a mixed model to partition dichotomous phenotypes into an additive component and non-additive residuals on the liability scale and (2) the Levene's test to assess equality of the residual variances across genotype groups...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28703918/association-between-the-vitamin-d-receptor-gene-polymorphisms-and-diabetic-nephropathy-risk-a-meta-analysis
#6
Fang Yin, Jing Liu, Ming-Xiu Fan, Xiao-Li Zhou, Xiao-Ling Zhang
AIMS: Diabetic nephropathy (DN) is a severe microvascular complication frequently associated with type 1 and type 2 diabetes mellitus. The objective of this study was to estimate the effect between Apa I, Bsm I, Fok I and Taq I polymorphisms of the vitamin D receptor (VDR) gene and DN susceptibility. METHODS: Eligible case-control studies published updated to March 2017 were searched. The odds ratio (OR) and 95% confident intervals (CI) were employed to calculate the strength of effect...
July 13, 2017: Nephrology
https://www.readbyqxmd.com/read/28697996/s-25-hydroxyvitamin-d-and-c3-epimers-in-pregnancy-and-infancy-an-odense-child-cohort-study
#7
Nanne Dreier Mydtskov, Sine Lykkedegn, Palle Back Nielsen Fruekilde, Jan Nielsen, Torben Barington, Henrik Thybo Christesen
BACKGROUND: Analysis of serum 25-hydroxyvitamin D (s-25(OH)D) may be complicated by the less active or in-active vitamin D metabolite C3-epi-25(OH)D3 (C3-epimer). We aimed to explore the relationship between s-C3-epimer and s-25(OH)D and other determinants and describe the longitudinal course of the C3-epimer fraction in paired mother-child samples. METHOD: S-25(OH)D and s-C3-epimer were estimated by liquid chromatography mass spectrometry in 290 mother-infant pairs from the population-based Odense Child Cohort...
July 8, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28695324/the-effect-of-almonds-on-vitamin-e-status-and-cardiovascular-risk-factors-in-korean-adults-a-randomized-clinical-trial
#8
Hana Jung, C-Y Oliver Chen, Jeffrey B Blumberg, Ho-Kyung Kwak
PURPOSE: Almonds have shown to beneficially modify some cardiovascular risk factors in clinical trials conducted in diverse ethnic populations but this relationship has never been tested in Koreans. Thus, we tested the impact of almonds consumed as a snack within the context of a typical Korean diet on cardiovascular risk factors. METHODS: We conducted a randomized, crossover trial in a free-living setting with a 2-week run-in period, two 4-week intervention phases, and a 2-week washout period between interventions...
July 10, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28693452/ascorbic-acid-concentrations-in-aqueous-humor-after-systemic-vitamin-c-supplementation-in-patients-with-cataract-pilot-study
#9
Young-Sool Hah, Hye Jin Chung, Sneha B Sontakke, In-Young Chung, Sunmi Ju, Seong-Wook Seo, Ji-Myong Yoo, Seong-Jae Kim
BACKGROUND: To measure ascorbic acid concentration in aqueous humor of patients with cataract after oral or intravenous vitamin C supplementation. METHODS: Forty-two eyes of 42 patients with senile cataract who underwent uncomplicated cataract surgery were enrolled. Patients (n = 14 each) were administered oral vitamin C (2 g), intravenous vitamin C (20 g) or no treatment (control group) on the day before surgery. Samples of aqueous humor (0.1 cm(3)) were obtained by anterior chamber aspiration at the beginning of surgery and stored at -80 °C...
July 11, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28688841/how-mr1-presents-a-pathogen-metabolic-signature-to-mucosal-associated-invariant-t-mait-cells
#10
REVIEW
Hamish E G McWilliam, Jose A Villadangos
Mucosal-associated invariant T (MAIT) cells are innate-like lymphocytes restricted by the antigen (Ag)-presenting molecule MHC class I (MHC I)-related protein 1 (MR1). The Ags presented by MR1 are vitamin B-related Ags (VitBAgs), 'building-block' metabolites of riboflavin that are synthesized by a range of microbes. MR1 presentation is thus a unique mechanism for the immune detection of a pathogen metabolic signature. While the full picture of how MR1 accomplishes this remains incomplete, recent data show that, unlike other MHC molecules, MR1 operates by a presentation-on-demand mechanism...
July 5, 2017: Trends in Immunology
https://www.readbyqxmd.com/read/28680065/nopal-opuntia-ficus-indica-protects-from-metabolic-endotoxemia-by-modifying-gut-microbiota-in-obese-rats-fed-high-fat-sucrose-diet
#11
Mónica Sánchez-Tapia, Miriam Aguilar-López, Claudia Pérez-Cruz, Edgar Pichardo-Ontiveros, Mei Wang, Sharon M Donovan, Armando R Tovar, Nimbe Torres
Current efforts are directed to reducing the gut dysbiosis and inflammation produced by obesity. The purpose of this study was to investigate whether consuming nopal, a vegetable rich in dietary fibre, vitamin C, and polyphenols can reduce the metabolic consequences of obesity by modifying the gut microbiota and preventing metabolic endotoxemia in rats fed a high fat and sucrose diet. With this aim, rats were fed a high fat diet with 5% sucrose in the drinking water (HFS) for 7 months and then were fed for 1 month with HFS + 5% nopal (HFS + N)...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28679140/the-effects-of-vitamin-d-supplementation-on-metabolic-status-of-patients-with-polycystic-ovary-syndrome-a-randomized-double-blind-placebo-controlled-trial
#12
Maryam Maktabi, Maryam Chamani, Zatollah Asemi
Data on the effects of vitamin D supplementation on metabolic status of patients with polycystic ovary syndrome (PCOS) are scarce. The current study was conducted to evaluate the effects of vitamin D supplementation on metabolic status of patients with PCOS. This randomized double-blind, placebo-controlled trial was performed on 70 vitamin D-deficient (serum concentrations<20 ng/ml) women with phenotype B-PCOS according to the Rotterdam criteria aged 18-40 years old. Participants were randomly allocated into 2 groups to take either 50 000 IU vitamin D (n=35) or placebo (n=35) every 2 weeks for 12 weeks...
July 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/28677422/evaluation-of-a-standardized-perioperative-management-protocol-in-the-adult-hematology-anticoagulation-management-service
#13
Diane J Lum, Patricia A Ross, Martin A Bishop, Michelle L Caetano, Michael B Streiff
BACKGROUND: In North America, 250,000 patients on vitamin K antagonists require surgical procedures each year. Temporary interruption of oral anticoagulation and perioperative bridging therapy with unfractionated heparin or low-molecular-weight heparin are recommended by the American College of Chest Physicians 2012 for select patients. OBJECTIVES: The study objectives are to evaluate adherence and nonadherence to the Johns Hopkins clinic guidelines for perioperative management of anticoagulation and identify bleeding or thromboembolic events during perioperative management of anticoagulation...
July 1, 2017: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/28676681/maternal-vitamin-d-dna-methylation-at-imprint-regulatory-regions-and-offspring-weight-at-birth-1-year-and-3-years
#14
S E B Neelon, A J White, A C Vidal, J M Schildkraut, A P Murtha, S K Murphy, S W Kullman, C Hoyo
BACKGROUND/OBJECTIVE: Vitamin D deficiency during pregnancy is associated with poor birth outcomes in some studies, but few have examined weight beyond birth. Additionally, little is known about how vitamin D influences DNA methylation of regulatory regions known to be involved in growth, as possible mediators to weight status in offspring. SUBJECTS/METHODS: We conducted linear regressions to assess maternal plasma 25-hydroxyvitamin D (25(OH)D) by quartile and birth weight for gestational age z-score, 1-year weight-for-length z-score, and 3-year body mass index (BMI) z-score among 476 mother/infant dyads from a prospective cohort...
July 5, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28670529/a-prospective-study-on-role-of-supplemental-oral-calcium-and-vitamin-d-in-prevention-of-postthyroidectomy-hypocalcemia
#15
Krishnan Ravikumar, Dhalapathy Sadacharan, Sankaran Muthukumar, Thalavai Sundarram, Selladurai Periyasamy, R V Suresh
BACKGROUND: Postoperative transient hypocalcemia is sequelae of total thyroidectomy (TT), which is observed in up to 50% of patients. Routine oral calcium and Vitamin D supplementation have been proposed to prevent symptomatic hypocalcemia preventing morbidity and facilitating early discharge. PATIENTS AND METHODS: A total of 208 patients with nontoxic benign thyroid disorders, undergoing TT, were serially randomized into four groups: Group A (no supplements were given), Group B (oral calcium - 2 g/day given), Group C (calcium and calcitriol - 1 mcg/day are given), and Group D (calcium, calcitriol, and cholecalciferol - 60,000 IU/day are given)...
July 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28670522/co-administration-of-vitamin-e-and-testosterone-attenuates-the-atrazine-induced-toxic-effects-on-sperm-quality-and-testes-in-rats
#16
Hamed Rezaie Agdam, Mazdak Razi, Amir Amniattalab, Hassan Malekinejad, Morteza Molavi
OBJECTIVE: Atrazine (ATZ) as a widely used herbicide is considered as a potent endocrine disrupter which adversely affects reproductive systems in both genders. This study aimed to assess the effects of testosterone (T)- and vitamin E (VitE)- alone and their coadministration on testicular function and sperm parameters after exposure to ATZ in rats. MATERIALS AND METHODS: In this experimental study, the rats (n=30) are assigned into the following 5 groups: control-sham group (n=6) receiving corn oil, ATZ group (n=6) receiving 200 mg/kg ATZ alone, ATZ+VitE group (n=6) receiving 150 mg/kg ATZ+VitE, ATZ+T group (n=6) receiving 400 µg/kg ATZ+T, and ATZ+VitE+T group (n=6) receiving ATZ+VitE+T for 48 consecutive days...
July 2017: Cell Journal
https://www.readbyqxmd.com/read/28669663/1-25-oh-2-vitamin-d-3-contributes-to-osteoclast-like-trans-differentiation-of-malignant-plasma-cells
#17
Paola Cafforio, Stella D'Oronzo, Claudia Felici, Sandra Sigala, Martina Fragni, Francesco Silvestris
1,25-dihydroxyvitamin D (1,25(OH)2D) exerts pleiotropic effects including bone turnover and immune system regulation. It inhibits both T and B cell proliferation while decreasing the secretion of inflammatory cytokines and immunoglobulins. 1,25(OH)2D also modulates monocyte-macrophage and osteoclast (OC) maturation. Since we have previously described that malignant plasma cells may trans-differentiate towards the myeloid lineage participating to skeletal devastation in multiple myeloma (MM), we here evaluated in vitro the role of 1,25(OH)2D in this lineage switch...
June 29, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28667771/long-term-effects-of-severe-burn-injury-on-bone-turnover-and-microarchitecture
#18
Gabriela Katharina Muschitz, Elisabeth Schwabegger, Alexandra Fochtmann, Andreas Baierl, Roland Kocijan, Judith Haschka, Wolfgang Gruther, Jakob E Schanda, Heinrich Resch, Thomas Rath, Peter Pietschmann, Christian Muschitz
Severe burn injury triggers massive alterations in stress hormone levels with a dose-dependent hypermetabolic status including increased bone resorption. This study evaluated bone microarchitecture measured by non-invasive high resolution peripheral quantitative computed tomography (HR-pQCT). Changes of serum bone turnover markers (BTM) as well as regulators of bone signaling pathways involved in skeletal health were assessed. Standardized effect sizes as a quantitative measure regarding the impact of serum changes and the prediction of these changes on bone microarchitecture were investigated...
July 1, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28667458/variability-in-measures-of-mineral-metabolism-in-children-on-hemodialysis-impact-on-clinical-decision-making
#19
Aadil Kakajiwala, Thomas O Jemielita, Lawrence Copelovitch, Mary B Leonard, Susan L Furth, Amy York, Maryjane Benton, Andrew N Hoofnagle, Kimberly Windt, Karen Merrigan, April Lederman, Michelle R Denburg
BACKGROUND: Variability in measures of mineral metabolism has not been studied in pediatric end stage kidney disease. We sought to determine the intra-individual variability in measures of mineral metabolism in children on hemodialysis (HD) and its impact on clinical decision-making. METHODS: We conducted a prospective single-center study of children (3.6-17.3 years old) on chronic HD. Serial twice weekly measures of serum calcium, phosphate and intact parathyroid hormone (PTH), as well as weekly measures of fibroblast growth factor 23 (FGF23) and vitamin D metabolites, were obtained over a 12-week period in 10 children...
June 30, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28665937/cholecalciferol-decreases-inflammation-and-improves-vitamin-d-regulatory-enzymes-in-lymphocytes-in-the-uremic-environment-a-randomized-controlled-pilot-trial
#20
José Tarcisio G Carvalho, Marion Schneider, Lilian Cuppari, Caren C Grabulosa, Danilo T Aoike, Beata Marie Q Redublo, Marcelo C Batista, Miguel Cendoroglo, Rosa Maria Moyses, Maria Aparecida Dalboni
It has been reported that vitamin D regulates the immune system. However, whether vitamin D repletion modulates inflammatory responses in lymphocytes from dialysis patients is unclear. In the clinical trial, thirty-two (32) dialysis patients with 25 vitamin D ≤ 20ng/mL were randomized to receive either supplementation of cholecalciferol 100,000 UI/week/3 months (16 patients) or placebo (16 patients). In the in vitro study, B and T lymphocytes from 12 healthy volunteers (HV) were incubated with or without uremic serum in the presence or absence of 25 or 1,25 vitamin D...
2017: PloS One
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