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25-hydroxyvitamin D

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https://www.readbyqxmd.com/read/28443804/25-oh-d-levels-in-relation-to-gender-overweight-insulin-resistance-and-inflammation-in-a-cross-sectional-cohort-of-northern-italian-workers-evidence-in-support-of-preventive-health-care-programs
#1
Luisella Vigna, Letizia Cassinelli, Amedea Silvia Tirelli, Irene Felicetta, Filomena Napolitano, Laura Tomaino, Michela Mutti, Claudia Eleonora Barberi, Luciano Riboldi
OBJECTIVE: In recent years, the welfare of workers and the prevention of chronic disabling diseases has become a topic of great interest. This study investigates serum levels of total 25-hydroxyvitamin D (25(OH)D) in a cohort of overweight-obese and insulin-resistant northern Italian indoor workers in apparent good health followed a nutritional education program. METHODS: An observational cross-sectional study on 385 patients (females = 291, males = 94), age range 18-69 years and body mass index (BMI) > 25 kg/m(2), was performed at the Department of Occupational Medicine Milan, Italy, latitude 45...
April 26, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28443718/crosstalk-between-bone-and-fat-tissue-associations-between-vitamin-d-osteocalcin-adipokines-and-markers-of-glucose-metabolism-among-adolescents
#2
Kelly Virecoulon Giudici, Regina Mara Fisberg, Dirce Maria Lobo Marchioni, Bárbara Santarosa Emo Peters, Lígia Araújo Martini
OBJECTIVES: This study aimed to investigate the relationship between 25-hydroxyvitamin D (25(OH)D), osteocalcin, markers of glucose metabolism, and obesity-related parameters among adolescents. METHODS: This was a cross-sectional study with 198 adolescents age 14-18 years. Weight, height, and waist and hip circumferences were measured, as well as the following biochemical parameters: serum 25(OH)D, parathyroid hormone (PTH), total (tOC) and undercarboxylated (ucOC) osteocalcin, adiponectin, leptin, glucose, and insulin...
April 26, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28443156/serum-25-hydroxyvitamin-d-deficiency-and-hepatic-encephalopathy-in-chronic-liver-disease
#3
Helen Vidot, Alison Potter, Robert Cheng, Margaret Allman-Farinelli, Nicholas Shackel
AIM: To investigate the relationship between 25-hydroxyvitamin D (25-OHD) deficiency and hepatic encephalopathy (HE) in patients with chronic liver disease (CLD). METHODS: A retrospective analysis of the results of 392 adult patients with chronic liver disease who were assessed for liver transplantation between 2006 and 2010 was undertaken. HE, severity of CLD, nutritional status and 25-OHD were analysed in patients assessed for liver transplantation between 2006 and 2010...
April 8, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28441998/25-hydroxyvitamin-d-biomarkers-of-eosinophilic-inflammation-and-airway-remodeling-in-children-with-newly-diagnosed-untreated-asthma
#4
G Sypniewska, M Krintus, G Fulgheri, J Siodmiak, M Kuligowska-Prusinska, B Stepien-Jaszowska, R Staszak-Kowalska, A Zawadzka-Krajewska, S Kierat, K Bergmann, U Demkow
No abstract text is available yet for this article.
May 1, 2017: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/28441982/25-hydroxyvitamin-d-biomarkers-of-eosinophilic-inflammation-and-airway-remodeling-in-children-with-newly-diagnosed-untreated-asthma
#5
Grazyna Sypniewska, Magdalena Krintus, Gabriele Fulgheri, Joanna Siodmiak, Magdalena Kuligowska-Prusinska, Beata Stepien-Jaszowska, Radosława Staszak-Kowalska, Anna Zawadzka-Krajewska, Szymon Kierat, Katarzyna Bergmann, Urszula Demkow
BACKGROUND: Low 25-hydroxyvitamin D (25[OH]D) and asthma development may be related to airway remodeling and eosinophilia. Periostin is proposed as a key molecule that links remodeling and eosinophilic inflammation. OBJECTIVE: We evaluated the association of 25(OH)D concentration with periostin, peripheral blood eosinophil counts, and immunoglobulin E (IgE) in children with newly diagnosed asthma. METHODS: The study included 150 children: 110 with atopic asthma and 40 constituted a reference group...
May 1, 2017: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/28440755/dysfunctional-immunometabolic-effects-of-vitamin-d-deficiency-increased-cardiometabolic-risk-potential-epidemiological-alert-in-america
#6
Martin Rosas-Peralta, Michael F Holick, Gabriela Borrayo-Sánchez, Alejandra Madrid-Miller, Erick Ramírez-Árias, Efrain Arizmendi-Uribe
Vitamin D deficiency is a serious public health problem worldwide that affects not only skeletal health, but also a wide range of acute and chronic diseases. However, there is still skepticism because of the lack of randomized, controlled trials to support association studies on the benefits of vitamin D for non-skeletal health. This review was based on articles published during the 1980-2015 obtained from the Cochrane Central Register of controlled trials, MEDLINE and PubMed, and focuses on recent challenges with regard to the definition of vitamin D deficiency and how to achieve optimal serum 25-hydroxyvitamin D levels from dietary sources, supplements, and sun exposure...
March 2017: Endocrinol Diabetes Nutr
https://www.readbyqxmd.com/read/28439619/association-between-bone-mineral-density-muscle-strength-and-vitamin-d-status-in-patients-with-myasthenia-gravis-a-cross-sectional-study
#7
Y Guan, F Lv, Y Meng, D Ma, X Xu, Y Song, O Wang, Y Jiang, W Xia, X Xing, J Zhang, M Li
Myasthenia gravis (MG) patients had low proximal hip BMD, which could be explained by reduced muscle strength, elevated bone resorption markers, vitamin D deficiency, and increased PTH levels in those with MG compared to controls. INTRODUCTION: Muscle strength is closely correlated with bone mineral density (BMD) and vitamin D status. Here, we evaluated muscle strength, BMD, and vitamin D status in a large sample of Chinese patients with MG. METHODS: In this cross-sectional survey, 86 patients with MG without glucocorticoid treatment and 86 healthy controls were included...
April 24, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28437713/reference-intervals-for-serum-24-25-dihydroxyvitamin-d-and-the-ratio-with-25-hydroxyvitamin-d-established-using-a-newly-developed-lc-ms-ms-method
#8
Jonathan C Y Tang, Holly Nicholls, Isabelle Piec, Christopher J Washbourne, John J Dutton, Sarah Jackson, Julie Greeves, William D Fraser
24,25(OH)2D is the product of 25(OH)D catabolism by CYP24A1. The measurement of serum 24,25(OH)2D concentration may serve as an indicator of vitamin D catabolic status and the relative ratio with 25(OH)D can be used to identify patients with inactivating mutations in CYP24A1. We describe a LC-MS/MS method to determine: (1) the relationships between serum 24,25(OH)2D and 25(OH)D; (2) serum reference intervals in healthy individuals; (3) the diagnostic accuracy of 24,25(OH)2D measurement as an indicator for vitamin D status; 4) 24,25(OH)2D cut-off value for clinically significant change between inadequate and sufficient 25(OH)D status...
April 12, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28433267/dose-response-effects-of-supplementation-with-calcifediol-on-serum-25-hydroxyvitamin-d-status-and-its-metabolites-a-randomized-controlled-trial-in-older-adults
#9
Anouk M M Vaes, Michael Tieland, Margot F de Regt, Jonas Wittwer, Luc J C van Loon, Lisette C P G M de Groot
BACKGROUND & AIMS: Oral supplementation with vitamin D is recommended for older adults to maintain a sufficient 25-hydroxyvitamin D (25(OH)D) status throughout the year. While supplementation with vitamin D2 or D3 is most common, alternative treatment regimens exist which require further investigation with respect to increasing 25(OH)D concentration. We investigated the dose-response effects of supplementation with calcifediol compared to vitamin D3 and assessed the dose which results in mean serum 25(OH)D3 concentrations between 75 and 100 nmol/L...
March 31, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28429909/association-between-maternal-vitamin-d-status-during-pregnancy-and-offspring-cognitive-function-during-childhood-and-adolescence
#10
Sargoor R Veena, Ghattu V Krishnaveni, Krishnamachari Srinivasan, Kotrangada P Thajna, Bhavya G Hegde, Catharine R Gale, Caroline Hd Fall
BACKGROUND AND OBJECTIVES: Animal studies have demonstrated poor cognitive outcomes in offspring in relation to maternal vitamin D deficiency before and/or during pregnancy. Human studies linking maternal vitamin D status during pregnancy with offspring cognitive function are limited. We aimed to test the hypothesis that lower maternal vitamin D status during pregnancy is associated with poor offspring cognitive ability in an Indian population. METHODS AND STUDY DESIGN: Cognitive function was assessed in children from the Mysore Parthenon birth cohort during childhood (age 9-10 years; n=468) and adolescence (age 13-14 years; n=472) using 3 core tests from the Kaufman Assessment Battery for children and additional tests measuring learning, long-term retrieval/ storage, short-term memory, reasoning, verbal fluency, visuo-spatial ability, and attention and concentration...
May 2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28429905/maintenance-vitamin-d3-dosage-requirements-in-chinese-women-with-post-menopausal-osteoporosis-living-in-the-tropics
#11
Yogeswari Venugopal, Sharifah F Wan Muhamad Hatta, Nurbazlin Musa, Siti Abdul Rahman, Jeyakantha Ratnasingam, Sharmila Sunita Paramasivam, Lee Ling Lim, Luqman Ibrahim, Karen Choong, Alexander Tb Tan, Karuthan Chinna, Siew Pheng Chan, Shireene R Vethakkan
BACKGROUND AND OBJECTIVES: Vitamin D3 (cholecalciferol) dose required to maintain sufficiency in non- Caucasian women with postmenopausal osteoporosis (PMO) inthe tropics has not been well studied. Some guidelines mandate 800-1000 IU vitamin D/day but the Endocrine Society (US) advocates 1500-2000 IU/day to maintain 25-hydroxyvitamin-D (25(OH)D) concentration at >75 nmol/L. We aimed to establish oral cholecalciferol dose required to maintain 25(OH)D concentration at >75 nmol/L in PMO Chinese Malaysian women, postulating lower dose requirements amongst light-skinned subjects in the tropics...
May 2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28429558/is-there-a-role-or-target-value-for-nutritional-vitamin-d-in-chronic-kidney-disease
#12
Wai H Lim, Emma L Duncan
Vitamin D is important for bone health in the general population but the value of vitamin D supplementation, and the role of 25-hydroxyvitamin D independently of 1,25-dihydroxyvitmain D, in individuals with chronic kidney disease (CKD), particularly in those who require dialysis, remains uncertain. Supplementation may improve some biochemical parameters, such as reducing PTH levels in patients to CKD-stage 4 who have vitamin D deficiency; but it remains to be established whether the role of nutritional vitamin D in maintaining bone health in the general population can be extrapolated to the CKD population...
March 2017: Nephrology
https://www.readbyqxmd.com/read/28424259/maternal-vitamin-d-insufficiency-early-in-pregnancy-is-associated-with-increased-risk-of-preterm-birth-in-ethnic-minority-women-in-canada
#13
Negar Tabatabaei, Nathalie Auger, Catherine M Herba, Shuqin Wei, Catherine Allard, Guy D Fink, William D Fraser
Background: Maternal vitamin D insufficiency (plasma 25-hydroxyvitamin D [25(OH)D] <75 nmol/L) may play a role in ethnic disparities in rates of preterm and spontaneous preterm births.Objective: We explored the relation between maternal plasma 25(OH)D concentration in the first trimester (8-14 wk of gestation) and the risk of preterm and spontaneous preterm births (<37 wk of gestation) by ethnicity.Methods: We designed a case-control study that included 120 cases of preterm birth (<37 wk of gestation) and 360 term controls (≥37 wk of gestation) of singleton pregnancies from the 3D cohort, a multicenter study in 2456 pregnant women in Quebec, Canada...
April 19, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28424186/circulating-concentrations-of-biomarkers-and-metabolites-related-to-vitamin-status-one-carbon-and-the-kynurenine-pathways-in-us-nordic-asian-and-australian-populations
#14
Øivind Midttun, Despoina Theofylaktopoulou, Adrian McCann, Anouar Fanidi, David C Muller, Klaus Meyer, Arve Ulvik, Wei Zheng, Xiao-Ou Shu, Yong-Bing Xiang, Ross Prentice, Cynthia A Thomson, Mary Pettinger, Graham G Giles, Allison Hodge, Qiuyin Cai, William J Blot, Jie Wu, Mikael Johansson, Johan Hultdin, Kjell Grankvist, Victoria L Stevens, Marjorie L McCullough, Stephanie J Weinstein, Demetrius Albanes, Arnulf Langhammer, Kristian Hveem, Marit Næss, Howard D Sesso, J Michael Gaziano, Julie E Buring, I-Min Lee, Gianluca Severi, Xuehong Zhang, Jiali Han, Meir J Stampfer, Stephanie A Smith-Warner, Anne Zeleniuch-Jacquotte, Loic le Marchand, Jian-Min Yuan, Lesley M Butler, Woon-Puay Koh, Renwei Wang, Yu-Tang Gao, Ulrika Ericson, Emily Sonestedt, Regina G Ziegler, Neal D Freedman, Kala Visvanathan, Miranda R Jones, Caroline Relton, Paul Brennan, Mattias Johansson, Per M Ueland
Background: Circulating concentrations of biomarkers that are related to vitamin status vary by factors such as diet, fortification, and supplement use. Published biomarker concentrations have also been influenced by the variation across laboratories, which complicates a comparison of results from different studies.Objective: We robustly and comprehensively assessed differences in biomarkers that are related to vitamin status across geographic regions.Design: The trial was a cross-sectional study in which we investigated 38 biomarkers that are related to vitamin status and one-carbon and tryptophan metabolism in serum and plasma from 5314 healthy control subjects representing 20 cohorts recruited from the United States, Nordic countries, Asia, and Australia, participating in the Lung Cancer Cohort Consortium...
April 19, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28424184/demographic-lifestyle-and-genetic-determinants-of-circulating-concentrations-of-25-hydroxyvitamin-d-and-vitamin-d-binding-protein-in-african-american-and-european-american-women
#15
Song Yao, Chi-Chen Hong, Elisa V Bandera, Qianqian Zhu, Song Liu, Ting-Yuan David Cheng, Gary Zirpoli, Stephen A Haddad, Kathryn L Lunetta, Edward A Ruiz-Narvaez, Susan E McCann, Melissa A Troester, Lynn Rosenberg, Julie R Palmer, Andrew F Olshan, Christine B Ambrosone
Background: Vitamin D may have anticancer activities. The high prevalence of vitamin D deficiency in African Americans (AAs) may be a contributing factor to the cancer health disparities between AAs and European Americans (EAs).Objectives: We compared concentrations of 25(OH)D and vitamin D-binding protein (VDBP) in AA and EA women and investigated determinants of the vitamin D-biomarker concentrations in both populations.Design: We used data and biospecimens from 909 AA and 847 EA healthy control subjects from the Carolina Breast Cancer Study (CBCS) and the Women's Circle of Health Study (WCHS) in the African American Breast Cancer Epidemiology and Risk Consortium...
April 19, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28423480/the-effect-of-high-dose-vitamin-d-supplementation-on-muscular-function-and-quality-of-life-in-postmenopausal-women-a-randomized-controlled-trial
#16
G Grimnes, N Emaus, K D Cashman, R Jorde
OBJECTIVE: Observational studies have suggested positive associations between serum 25-hydroxyvitamin D (25(OH)D) levels and muscular strength, balance and quality of life. Our aim was to examine whether high-dose vitamin D supplementation would improve these measures as compared to standard-dose vitamin D, as well as the possible muscular effects of Single Nucleotide Polymorphisms (SNPs) in genes encoding vitamin D-related enzymes. DESIGN: A 12-month randomized, double-blind, controlled trial where the participants received daily elemental calcium (1,000 mg) plus vitamin D3 (800 IU)...
April 19, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28421785/association-between-vitamin-d-levels-and-cardiovascular-risk-factors-in-obese-children-and-adolescents
#17
Ali Gul, Samet Ozer, Resul Yılmaz, Ergun Sonmezgoz, Tuba Kasap, Sahin Takcı, Osman Demir
BACKGROUND AND AIM: Childhood obesity is associated with an increased risk of chronic disease. We aimed to determine the association between vitamin D deficiency and cardiovascular risks in obese children. METHOD: The studied children were selected from obese children who were followed up at obesity clinic, aged 6-17 years. Basic demographic information and laboratory data were collected retrospectively from hospital records. RESULTS: A total of 310 students (178 [57...
March 30, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28421711/vitamin-d-status-of-white-pregnant-women-and-infants-at-birth-and-4%C3%A2-months-in-north-west-england-a-cohort-study
#18
A J B Emmerson, K Dockery, M Z Mughal, S A Roberts, C L Tower, J L Berry
The prevalence of vitamin D deficiency in pregnant white-skinned women (WSW) and their infants has not been investigated at northern latitudes in a developed county. A 2-year observational cohort study was undertaken in the North West of England to determine 25-hydroxyvitamin D (25OHD) levels in WSW and their infants during pregnancy and 4 months postdelivery and to explore factors associated with these levels. Nutritional and lifestyle questionnaires were completed and 25OHD levels measured at 28 weeks and 4 months postdelivery...
April 18, 2017: Maternal & Child Nutrition
https://www.readbyqxmd.com/read/28419523/multiple-imputation-to-evaluate-the-impact-of-an-assay-change-in-national-surveys
#19
Maya Sternberg
National health surveys, such as the National Health and Nutrition Examination Survey, are used to monitor trends of nutritional biomarkers. These surveys try to maintain the same biomarker assay over time, but there are a variety of reasons why the assay may change. In these cases, it is important to evaluate the potential impact of a change so that any observed fluctuations in concentrations over time are not confounded by changes in the assay. To this end, a subset of stored specimens previously analyzed with the old assay is retested using the new assay...
April 16, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28418890/the-serum-25-hydroxyvitamin-d-levels-and-hip-fracture-risk-a-meta-analysis-of-prospective-cohort-studies
#20
REVIEW
Qing-Bo Lv, Xiang Gao, Xiang Liu, Zhen-Xuan Shao, Qian-Hui Xu, Li Tang, Yong-Long Chi, Ai-Min Wu
Hip fracture has increasingly become a social and economic burden. The relationship between serum 25-hydroxyvitamin D levels and the risk of hip fracture reported by previous studies remains controversial. We searched Pubmed and Embase to identify studies reporting the relationship between serum 25-hydroxyvitamin D levels and risk of hip fracture. Fifteen prospective cohort studies with a total of 51239 participants and 3386 hip fracture cases were included. By pooling the Relative Risk of the lowest vs. the highest categories indicated that lower levels of serum 25-hydroxyvitamin D were more likely to be a risk factor for hip fracture with adjusted Relative Risk (95%Confidence Interval) of 1...
March 17, 2017: Oncotarget
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