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Vitamin b and d deficiency

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https://www.readbyqxmd.com/read/28211493/25-hydroxyvitamin-d3-induces-osteogenic-differentiation-of-human-mesenchymal-stem-cells
#1
Yan-Ru Lou, Tai Chong Toh, Yee Han Tee, Hanry Yu
25-Hydroxyvitamin D3 [25(OH)D3] has recently been found to be an active hormone. Its biological actions are demonstrated in various cell types. 25(OH)D3 deficiency results in failure in bone formation and skeletal deformation. Here, we investigated the effect of 25(OH)D3 on osteogenic differentiation of human mesenchymal stem cells (hMSCs). We also studied the effect of 1α,25-dihydroxyvitamin D3 [1α,25-(OH)2D3], a metabolite of 25(OH)D3. One of the vitamin D responsive genes, 25(OH)D3-24-hydroxylase (cytochrome P450 family 24 subfamily A member 1) mRNA expression is up-regulated by 25(OH)D3 at 250-500 nM and by 1α,25-(OH)2D3 at 1-10 nM...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28208834/in%C3%A2-pursuit%C3%A2-of%C3%A2-vitamin%C3%A2-d%C3%A2-in%C3%A2-plants
#2
Lucinda J Black, Robyn M Lucas, Jill L Sherriff, Lars Olof Björn, Janet F Bornman
Vitamin D deficiency is a global concern. Much research has concentrated on the endogenous synthesis of vitamin D in human skin following exposure to ultraviolet-B radiation (UV-B, 280-315 nm). In many regions of the world there is insufficient UV-B radiation during winter months for adequate vitamin D production, and even when there is sufficient UV-B radiation, lifestyles and concerns about the risks of sun exposure may lead to insufficient exposure and to vitamin D deficiency. In these situations, dietary intake of vitamin D from foods or supplements is important for maintaining optimal vitamin D status...
February 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28207791/vitamin-d-and-mortality-individual-participant-data-meta-analysis-of-standardized-25-hydroxyvitamin-d-in-26916-individuals-from-a-european-consortium
#3
Martin Gaksch, Rolf Jorde, Guri Grimnes, Ragnar Joakimsen, Henrik Schirmer, Tom Wilsgaard, Ellisiv B Mathiesen, Inger Njølstad, Maja-Lisa Løchen, Winfried März, Marcus E Kleber, Andreas Tomaschitz, Martin Grübler, Gudny Eiriksdottir, Elias F Gudmundsson, Tamara B Harris, Mary F Cotch, Thor Aspelund, Vilmundur Gudnason, Femke Rutters, Joline W J Beulens, Esther van 't Riet, Giel Nijpels, Jacqueline M Dekker, Diana Grove-Laugesen, Lars Rejnmark, Markus A Busch, Gert B M Mensink, Christa Scheidt-Nave, Michael Thamm, Karin M A Swart, Ingeborg A Brouwer, Paul Lips, Natasja M van Schoor, Christopher T Sempos, Ramón A Durazo-Arvizu, Zuzana Škrabáková, Kirsten G Dowling, Kevin D Cashman, Mairead Kiely, Stefan Pilz
BACKGROUND: Vitamin D deficiency may be a risk factor for mortality but previous meta-analyses lacked standardization of laboratory methods for 25-hydroxyvitamin D (25[OH]D) concentrations and used aggregate data instead of individual participant data (IPD). We therefore performed an IPD meta-analysis on the association between standardized serum 25(OH)D and mortality. METHODS: In a European consortium of eight prospective studies, including seven general population cohorts, we used the Vitamin D Standardization Program (VDSP) protocols to standardize 25(OH)D data...
2017: PloS One
https://www.readbyqxmd.com/read/28202290/effect-of-psychotropic-drug-treatment-on-sterol-metabolism
#4
Željka Korade, Wei Liu, Emily B Warren, Kristan Armstrong, Ned A Porter, Christine Konradi
Cholesterol metabolism is vital for brain function. Previous work in cultured cells has shown that a number of psychotropic drugs inhibit the activity of 7-dehydrocholesterol reductase (DHCR7), an enzyme that catalyzes the final steps in cholesterol biosynthesis. This leads to the accumulation of 7-dehydrocholesterol (7DHC), a molecule that gives rise to oxysterols, vitamin D, and atypical neurosteroids. We examined levels of cholesterol and the cholesterol precursors desmosterol, lanosterol, 7DHC and its isomer 8-dehydrocholesterol (8DHC), in blood samples of 123 psychiatric patients on various antipsychotic and antidepressant drugs, and 85 healthy controls, to see if the observations in cell lines hold true for patients as well...
February 12, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28188479/short-term-uvb-irradiation-significantly-increases-vitamin-d-serum-concentration-in-obese-patients-a-clinical-pilot-study
#5
Alexander Obbarius, Heike Berger, Andreas Stengel, Carmen Garcia, Felix Fischer, Tobias Hofmann, Matthias Rose, Ralf Uebelhack
PURPOSE: Deficiency of vitamin D is very common in obese people and treatment by oral supplementation is not effective in all patients. This exploratory pilot study investigated the influence of different doses of short-term ultraviolet B irradiation on serum 25-hydroxyvitamin-D3 (25D) and 1,25-dihydroxyvitamin-D3 (1,25D) levels in obese compared to normal weight subjects and obese controls. METHODS: Participants with skin types II and III (Fitzpatrick skin classification) were assigned to six groups including four intervention groups receiving irradiation (three groups of obese and one group of normal weight subjects) and two control groups without treatment (obese and normal weight)...
February 10, 2017: Endocrine
https://www.readbyqxmd.com/read/28182265/long-term-metformin-therapy-and-monitoring-for-vitamin-b12-deficiency-among-older-veterans
#6
Vijaya Kancherla, John L Elliott, Birju B Patel, N Wilson Holland, Theodore M Johnson, Anjali Khakharia, Lawrence S Phillips, Godfrey P Oakley, Camille P Vaughan
OBJECTIVE: To examine the association between long-term metformin therapy and serum vitamin B12 monitoring. DESIGN: Retrospective cohort study. SETTING: A single Veterans Affairs Medical Center (VAMC), 2002-2012. PARTICIPANTS: Veterans 50 years or older with either type 2 diabetes and long-term metformin therapy (n = 3,687) or without diabetes and no prescription for metformin (n = 13,258). MEASUREMENTS: We determined diabetes status from outpatient visits, and defined long-term metformin therapy as a prescription ≥500 mg/d for at least six consecutive months...
February 9, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28179376/the-variation-in-free-25-hydroxy-vitamin-d-and-vitamin-d-binding-protein-with-season-and-vitamin-d-status
#7
Göran Oleröd, Lillemor Mattsson Hultén, Ola Hammarsten, Eva Klingberg
PURPOSE: Serum 25-hydroxy vitamin D [25(OH)D] varies greatly with season at northern latitudes. The purpose of this study was to determine if the seasonal variations in serum total 25(OH)D is followed by a concomitant variation in free 25(OH)D or if the variation is damped by alterations in the binding capacity of DBP. METHODS: Serum was collected from 540 healthy blood donors (60% men; mean age 41±13 years) during 12 months and analyzed for total 25(OH)D, directly measured free 25(OH)D, vitamin D binding protein (DBP) and albumin...
February 8, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28179126/vitamin-d-deficiency-in-mothers-neonates-and-children
#8
Deena H Elsori, Majeda S Hammoud
Vitamin D is produced in response to the exposure of skin to sunlight through UV-B synthesis. It can also be obtained from diet and dietary supplements. Vitamin D is essential for strong bones as it helps to absorb calcium from diet. Vitamin D deficiency mainly occurs if strict vegetarian diet is followed as mostly the source of vitamin D is animal based; therefore, exposure to sunlight is restricted or having dark skin color. Low vitamin D levels results in increased possibility of gestational diabetes among pregnant women, low birth weight and pre-eclampsia in infants, and mothers may suffer bone impairment, osteoporosis, hypocalcaemia, and hypertension...
February 5, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28173916/effect-of-mineral-and-bone-metabolism-on-restless-legs-syndrome-in-hemodialysis-patients
#9
Precil D M M Neves, Fabiana G Graciolli, Ivone B Oliveira, Ramaiane A Bridi, Rosa M A Moysés, Rosilene M Elias
STUDY OBJECTIVES: Restless legs syndrome (RLS) is a highly prevalent sleep disease among patients on hemodialysis. The physiopathology is still unclear, and may be multifactorial. Because of the association between iron metabolism and chronic kidney disease-mineral and bone disorders (CKD-MBD), we hypothesized that both factors would be associated with RLS. METHODS: We have evaluated hemodialysis patients, in a face-to-face interview for the diagnosis and severity of RLS, as measured by the International Restless Legs Syndrome Study Group...
January 15, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28172966/p710-vitamin-d-deficiency-is-not-associated-with-depression-in-ibd-patients
#10
S O Frigstad, M Høivik, J Jahnsen, S R Dahl, M Cvancarova, T Grimstad, I P Berset, G Huppertz-Hauss, Ø Hovde, R Torp, T Bernklev, B Moum, L-P Jelsness-Jørgensen
No abstract text is available yet for this article.
February 1, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28169875/vitamin-a-and-d-deficiencies-associated-with-incident-tuberculosis-in-hiv-infected-patients-initiating-antiretroviral-therapy-in-multinational-case-cohort-study
#11
Mark W Tenforde, Ashish Yadav, David W Dowdy, Nikhil Gupte, Rupak Shivakoti, Wei-Teng Yang, Noluthando Mwelase, Cecilia Kanyama, Sandy Pillay, Wadzanai Samaneka, Breno Santos, Selvamuthu Poongulali, Srikanth Tripathy, Cynthia Riviere, Sima Berendes, Javier R Lama, Sandra W Cardoso, Patcharaphan Sugandhavesa, Parul Christian, Richard D Semba, Thomas B Campbell, Amita Gupta
INTRODUCTION: Numerous micronutrients have immunomodulatory roles that may influence risk of tuberculosis (TB), but the association between baseline micronutrient deficiencies and incident TB after antiretroviral (ART) initiation in HIV-infected individuals is not well characterized. METHODS: We conducted a case-cohort study (n=332) within a randomized trial comparing three ART regimens in 1571 HIV treatment-naïve adults from nine countries. A subcohort of 30 patients was randomly selected from each country (n=270)...
February 6, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28165551/thyroid-disorders-in-polycystic-ovary-syndrome
#12
K Kowalczyk, G Franik, D Kowalczyk, D Pluta, Ł Blukacz, P Madej
OBJECTIVE: Thyroid disorders, especially Hashimoto's thyroiditis (HT), are observed significantly more often in patients with polycystic ovary syndrome (PCOS) than in the general population - approximately 27% and 8%, respectively. This is extremely important in young women, because both disorders are connected with fertility problems. As HT and PCOS occur together, fertility problems may become a serious clinical issue in these patients. MATERIALS AND METHODS: A systematic literature review in PubMed of PCOS- and HT-related articles in English, published until December 2015 was conducted...
January 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28161533/prevalence-determinants-and-clinical-correlates-of-vitamin-d-deficiency-in-patients-with-chronic-obstructive-pulmonary-disease-in-london-uk
#13
David A Jolliffe, Wai Yee James, Richard L Hooper, Neil C Barnes, Claire L Greiller, Kamrul Islam, Angshu Bhowmik, Peter M Timms, Raj K Rajakulasingam, Aklak B Choudhury, David E Simcock, Elina Hyppönen, Robert T Walton, Christopher J Corrigan, Christopher J Griffiths, Adrian R Martineau
Vitamin D deficiency is common in patients with chronic obstructive pulmonary disease (COPD), yet a comprehensive analysis of environmental and genetic determinants of serum 25-hydroxyvitamin D (25[OH]D) concentration in patients with this condition is lacking. We conducted a multi-centre cross-sectional study in 278 COPD patients aged 41-92 years in London, UK. Details of potential environmental determinants of vitamin D status and COPD symptom control and severity were collected by questionnaire, and blood samples were taken for analysis of serum 25(OH)D concentration and DNA extraction...
February 1, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28122934/riboflavin-deficiency-in-rats-decreases-de-novo-formate-production-but-does-not-affect-plasma-formate-concentration
#14
Luke MacMillan, Simon G Lamarre, Robin P daSilva, René L Jacobs, Margaret E Brosnan, John T Brosnan
BACKGROUND: The one-carbon metabolism pathway is highly dependent on a number of B vitamins in order to provide one-carbon units for purine and thymidylate biosynthesis as well as homocysteine remethylation. Previous studies have examined folate and vitamin B-12 deficiency and their effects on formate metabolism; as of yet, to our knowledge, no studies on the effects of riboflavin deficiency on formate metabolism have been published. OBJECTIVE: Our objective was to determine the effects of riboflavin deficiency on formate metabolism...
January 25, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28116392/the-influence-of-lipid-droplet-size-on-the-oral-bioavailability-of-vitamin-d2-encapsulated-in-emulsions-an-in-vitro-and-in-vivo-study
#15
L Salvia-Trujillo, B Fumiaki, Y Park, D J McClements
Vitamin D deficiency is prevalent in some populations leading to adverse health effects, and therefore there is a need to supplement functional foods and beverages with this important micronutrient. In this study, we examined the influence of the initial lipid droplet size on the in vitro bioaccessibility and in vivo absorption of vitamin D2 encapsulated in oil-in-water emulsions. Changes in particle size, charge, and microstructure were measured as vitamin-loaded lipid droplets were passed through a simulated GIT (mouth, stomach, small intestine)...
January 24, 2017: Food & Function
https://www.readbyqxmd.com/read/28106733/high-prevalence-of-vitamin-b12-deficiency-and-no-folate-deficiency-in-young-children-in-nepal
#16
Bernadette N Ng'eno, Cria G Perrine, Ralph D Whitehead, Giri Raj Subedi, Saba Mebrahtu, Pradiumna Dahal, Maria Elena D Jefferds
Many children in low- and middle-income countries may have inadequate intake of vitamin B12 and folate; data confirming these inadequacies are limited. We used biochemical, demographic, behavioral and anthropometric data to describe the folate and vitamin B12 concentrations among six- to 23-month-old Nepalese children. Vitamin B12 (serum B12 < 150 pmol/L) and folate deficiencies (red blood cell (RBC) folate < 226.5 nmol/L) were assessed. We used logistic regression to identify predictors of vitamin B12 deficiency...
January 17, 2017: Nutrients
https://www.readbyqxmd.com/read/28098047/vitamin-a-deficiency-suppresses-fish-immune-function-with-differences-in-different-intestinal-segments-the-role-of-transcriptional-factor-nf-%C3%AE%C2%BAb-and-p38-mitogen-activated-protein-kinase-signalling-pathways
#17
Li Zhang, Lin Feng, Wei-Dan Jiang, Yang Liu, Pei Wu, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Xiao-Qiu Zhou
The present study investigated the effects of dietary vitamin A on immune function in the proximal intestine (PI), mid intestine (MI) and distal intestine (DI) of young grass carp (Ctenopharyngodon idella). Fish were fed graded levels of dietary vitamin A for 10 weeks, and then a challenge test using an injection of Aeromonas hydrophila was conducted for 14 d. The results showed that, compared with the optimum vitamin A level, vitamin A deficiency significantly decreased fish growth performance, increased enteritis morbidity, decreased intestinal innate humoral immune response and aggravated intestinal inflammation...
January 18, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28092390/asthma-comparing-the-impact-of-vitamin-d-versus-uvr-on-clinical-and-immune-parameters
#18
Kylie A Morgan, Elizabeth H Mann, Antony R Young, Catherine M Hawrylowicz
The incidence of asthma has increased markedly since the 1960s and is currently estimated to affect more than 300 million individuals worldwide. A number of environmental factors are implicated in asthma pathogenesis, one of which is vitamin D. Vitamin D deficiency is a global health concern and has increased in parallel with asthma incidence. Epidemiological studies report associations between low vitamin D status, assessed as circulating levels of 25-hydroxyvitamin D, with asthma incidence, severity, exacerbations and responses to treatment...
January 16, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28087280/increased-homocysteine-levels-impair-reference-memory-and-reduce-cortical-levels-of-acetylcholine-in-a-mouse-model-of-vascular-cognitive-impairment
#19
Kevin Dam, Martina Füchtemeier, Tracy D Farr, Philipp Boehm-Sturm, Marco Foddis, Ulrich Dirnagl, Olga Malysheva, Marie A Caudill, Nafisa M Jadavji
Folates are B-vitamins that are vital for normal brain function. Deficiencies in folates either genetic (methylenetetrahydrofolate reductase, MTHFR) or dietary intake of folic acid result in elevated levels of homocysteine. Clinical studies have shown that elevated levels of homocysteine (Hcy) may be associated with the development of dementia, however this link remains unclear. The purpose of this study was to evaluate the impact of increased Hcy levels on a mouse model of vascular cognitive impairment (VCI) produced by chronic hypoperfusion...
March 15, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28070764/serum-25-oh-vitamin-d-levels-in-systemic-sclerosis-analysis-of-140-patients-and-review-of-the-literature
#20
Dilia Giuggioli, M Colaci, G Cassone, P Fallahi, F Lumetti, A Spinella, F Campomori, A Manfredi, C U Manzini, A Antonelli, C Ferri
Hypovitaminosis D is increasingly reported in autoimmune diseases. We investigated the 25-OH-vitamin D (25-OH-vitD) levels in systemic sclerosis (SSc) patients, in correlation with disease's features. We measured the 25-OH-vitD serum levels in 140 consecutive patients (F/M 126/15; mean age 61 ± 15.1 years), 91 without (group A) and 49 with (group B) 25-OH-cholecalciferol supplementation. Patients of group A invariably showed low 25-OH-vitD levels (9.8 ± 4.1 ng/ml vs. 26 ± 8.1 ng/ml of group B); in particular, 88/91 (97%) patients showed vitamin D deficiency (<20 ng/ml), with very low vitamin D levels (<10 ng/ml) in 40 (44%) subjects...
January 9, 2017: Clinical Rheumatology
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