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25-hydroxyvitamin D

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https://www.readbyqxmd.com/read/29243005/efficacy-and-safety-outcomes-in-vitamin-d-supplement-users-in-the-fingolimod-phase-3-trials
#1
Kira Hongell, Diego G Silva, Shannon Ritter, Daniela Piani Meier, Merja Soilu-Hänninen
BACKGROUND: Low serum levels of 25-hydroxyvitamin D have been associated with worse outcomes in multiple sclerosis (MS) patients treated with interferon-beta. Association of vitamin D nutrition on the outcomes of other MS therapies has been studied less. OBJECTIVE: Whether patients in the phase 3 fingolimod trials using vitamin D supplements have better clinical, MRI and safety outcomes than non-users. MATERIALS AND METHODS: Pooled data from phase 3 FREEDOMS trials was analyzed post hoc...
December 14, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29242845/no-effect-of-vitamin-d-supplementation-on-cardiovascular-risk-factors-in-subjects-with-metabolic-syndrome-a-pilot-randomised-study
#2
Stefania E Makariou, Moses Elisaf, Anna Challa, Nikolaos Tentolouris, Evangelos N Liberopoulos
Introduction: Patients with metabolic syndrome (MetS) may have lower 25-hydroxyvitamin D (25(OH)VitD) serum levels compared with non-MetS individuals. Vitamin D (VitD) deficiency is associated with various cardiovascular disease (CVD) risk factors. Yet, the effect of VitD supplementation on MetS remains uncertain. Our aim was to examine the effect of VitD supplementation on CVD risk factors in MetS subjects. Material and methods: This pilot study had a PROBE (prospective, randomised, open-label, blinded end-point) design...
2017: Archives of Medical Sciences. Atherosclerotic Diseases
https://www.readbyqxmd.com/read/29242120/osteoprotective-effects-of-salidroside-in-ovariectomized-mice-and-diabetic-mice
#3
Xiang-Fan Chen, Xiao-Li Li, Min Yang, Yan Song, Yan Zhang
Salidroside, an active constituent from the root of Rhodiola rosea L., has multiple pharmacological effects, such as anti-cancer, anti-inflammatory and anti-oxidative properties, etc. However, its protective effect on bone tissue via regulating calcium homeostasis is yet to be determined. This study was performed to investigate if salidroside could protect against bone injuries induced by estrogen deficiency or hyperglycemia through modulating calcium homeostasis. Ovariectomized (OVX) mice and diabetic mice were treated with salidroside (20mg/kg) for 6 weeks...
December 11, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29241323/serum-25-hydroxyvitamin-d-concentrations-and-selected-diet-components-in-postmenopausal-women
#4
Anna Huta-Osiecka, Zbigniew Kasprzak, Krystian Wochna, Alicja Nowak
BACKGROUND: Nutrition and lifestyle factors play an important role in the development and maintenance of peak bone mass and the prevention of bone degradation. The aim of the present study was to assess 25-hydroxy- cholecalciferol [25(OH)D] serum concentration in postmenopausal women during the winter period and the supply of selected components in their diet. METHODS: The study was conducted on a group of 35 women aged 54–77, using a question- naire, including a 24-hour recall related to a subject’s nutrient consumption...
October 2017: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/29238429/the-effect-of-ongoing-vitamin-d-and-low-fat-milk-intake-on-bone-metabolism-in-female-high-school-endurance-runners
#5
Aoi Ikedo, Takuma Arimitsu, Toshiyuki Kurihara, Kumiko Ebi, Satoshi Fujita
Background: Vitamin D and calcium are essential nutrients for bone health. In addition, vitamin D suppresses inflammatory cytokines and increases bone resorption. Therefore, improvements in bone health by calcium and vitamin D supplementation have the potential to not only improve calcium metabolism but also suppress inflammation associated with exercise training. The purpose of this study was to determine whether ongoing vitamin D supplementation and low-fat milk intake by female high-school endurance runners would improve bone metabolism by suppressing inflammatory cytokines and the parathyroid hormone (PTH)...
January 2018: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/29236049/effect-of-monthly-high-dose-long-term-vitamin-d-on-lung-function-a-randomized-controlled-trial
#6
John D Sluyter, Carlos A Camargo, Debbie Waayer, Carlene M M Lawes, Les Toop, Kay-Tee Khaw, Robert Scragg
Although observational studies suggest positive vitamin D-lung function associations, randomized trials are inconsistent. We examined effects of vitamin D supplementation on lung function. We recruited 442 adults (50-84 years, 58% male) into a randomized, double-blinded, placebo-controlled trial. Participants received, for 1.1 years (median; range = 0.9-1.5 years), either (1) vitamin D₃ 200,000 IU, followed by monthly 100,000 IU doses (n = 226); or (2) placebo monthly (n = 216). At baseline and follow-up, spirometry yielded forced expiratory volume in 1 s (FEV1; primary outcome)...
December 13, 2017: Nutrients
https://www.readbyqxmd.com/read/29235559/body-size-modifies-the-relationship-between-maternal-serum-25-hydroxyvitamin-d-concentrations-and-gestational-diabetes-in-high-risk-women
#7
Anita J Valkama, Jelena M Meinilä, Saila B Koivusalo, Jaana Lindström, Kristiina Rönö, Aila E Tiitinen, Beata Stach-Lempinen, Hannu J Kautiainen, Heli Viljakainen, Sture Andersson, Johan G Eriksson
Obesity increases the risk of low 25-hydroxyvitamin D (25(OH)D) concentrations and gestational diabetes (GDM). We explored whether the association between GDM and change in 25(OH)D concentrations measured in the first (7-18 wk) and second (20-27 wk) trimesters of pregnancy is dependent on maternal BMI. The study was a prospective study of 219 women with BMI of ≥30 kg/m2, a history of GDM, or both. The participants were stratified by first-trimester BMI: BMI of <25.0, 25.0-29.9, 30.0-34.9, and ≥35 kg/m2...
November 6, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29235391/association-between-vitamin-d-oestradiol-and-interferon-gamma-in-female-patients-with-inactive-systemic-lupus-erythematosus-a-cross-sectional-study
#8
Visnja Kokic, Dusanka Martinovic Kaliterna, Mislav Radic, Leida Tandara, Dijana Perkovic
Objectives To investigate possible associations between 25-hydroxyvitamin D3 (25(OH)D3), oestradiol (E2) and IFN-gamma (IFNγ) in female patients with inactive systemic lupus erythematosus (SLE). Methods Female patients with inactive SLE and age-matched healthy controls were recruited into this cross-sectional study. Serum concentrations of 25(OH)D3, E2 and IFNγ were measured by radioimmunoassay with gamma-counters and enzyme-linked immunosorbent assay. Results 36 patients and 37 controls were enrolled. In patients with SLE, the concentration of 25(OH)D3 was lower and E2 was higher compared with controls...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/29235126/relationships-of-serum-25-hydroxyvitamin-d-ionized-calcium-and-parathyroid-hormone-after-obesity-surgery
#9
Stephen Hewitt, Erlend Tuseth Aasheim, Torgeir Thorson Søvik, Jørgen Jahnsen, Jon Kristinsson, Erik Fink Eriksen, Tom Mala
OBJECTIVE: The high prevalence of secondary hyperparathyroidism (SHPT) after obesity surgery is a concern for long-term bone health. Limited knowledge exists about optimal vitamin D and suppression of parathyroid hormone (PTH) after these procedures. The aim of this study was to investigate the prevalence of SHPT and its relation to vitamin D status. DESIGN: A cross-sectional study at Oslo University Hospital, Norway. PATIENTS: 502 consecutive patients, age 22-64 years, attending 2-year follow-up after Roux-en-Y gastric bypass...
December 13, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29234503/study-protocol-for-a-phase-ii-dose-evaluation-randomized-controlled-trial-of-cholecalciferol-in-critically-ill-children-with-vitamin-d-deficiency-vitdal-picu-study
#10
Dayre McNally, Karin Amrein, Katharine O'Hearn, Dean Fergusson, Pavel Geier, Matt Henderson, Ali Khamessan, Margaret L Lawson, Lauralyn McIntyre, Stephanie Redpath, Hope A Weiler, Kusum Menon
Background: Clinical research has recently demonstrated that vitamin D deficiency (VDD) is highly prevalent in the pediatric intensive care unit (PICU) and associated with worse clinical course. Multiple adult ICU trials have suggested that optimization of vitamin D status through high-dose supplementation may reduce mortality and improve other clinically relevant outcomes; however, there have been no trials of rapid normalization in the PICU setting. The objective of this study is to evaluate the safety and efficacy of an enteral weight-based cholecalciferol loading dose regimen in critically ill children with VDD...
2017: Pilot and Feasibility Studies
https://www.readbyqxmd.com/read/29233204/is-there-a-role-for-vitamin-d-in-supporting-cognitive-function-as-we-age
#11
Niamh Aspell, Brian Lawlor, Maria O'Sullivan
Globally, an estimated 46 million people are currently living with dementia and this figure is projected to increase 3-fold by 2050, highlighting this major public health concern and its substantial associated healthcare costs. With pharmacological treatment yet to reach fruition, the emphasis on evidence-based preventative lifestyle strategies is becoming increasingly important and several modifiable lifestyle factors have been identified that may preserve cognitive health. These include good cardiovascular health, physical activity, low alcohol intake, smoking and a healthy diet, with growing interest in vitamin D...
December 13, 2017: Proceedings of the Nutrition Society
https://www.readbyqxmd.com/read/29226640/association-of-paraoxonase-1-polymorphism-and-serum-25-hydroxyvitamin-d-with-the-risk-of-cardiovascular-disease-in-patients-with-rheumatoid-arthritis
#12
Sawsan O Khoja, Yasser El Miedany, Archana P Iyer, Sami M Bahlas, Khadijah S Balamash, Mohamed F Elshal
BACKGROUND: Patients with rheumatoid arthritis (RA) have significantly increased cardiovascular (CV) morbidity and mortality that are not accounted for by traditional risk factors alone. Paraoxonase 1 (PON1) and 25-hydroxyvitamin D have been shown to be involved in the pathogenesis of CV diseases. Objective: This study aimed to investigate PON1 gene polymorphism and serum 25-hydroxyvitamin D concentrations in RA patients, and to determine their association with CV risk in RA. METHODS: Serum samples from 46 RA patients and 45 healthy controls were tested for PON1 R192Q genotypes and serum vitamin D concentrations...
November 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/29225208/dietary-calcium-and-serum-25ohd-protect-chinese-women-from-type-2-diabetes
#13
Lijun Feng, Zhefang Hu, Qingqing Wang
The Chinese dietary structure is different from Western and Mediterranean diets. This study aimed to assess the association of dietary calcium, serum 25-hydroxyvitamin D (25OHD), and other macronutrients with type 2 diabetes (T2D) in Chinese patients. This case-control study enrolled 605 patients (males, 337; females, 268) with T2D and 724 healthy subjects (males, 405; females, 319) at Sir Run Run Shaw Hospital from February to April 2014. Dietary calcium, total energy, fat to energy ratio, glucose administration, 2-h postprandial blood glucose, serum total cholesterol and high density lipoprotein (HDL)-cholesterol, and serum 25OHD level were assessed...
2017: Journal of Nutritional Science and Vitaminology
https://www.readbyqxmd.com/read/29220424/genetically-deprived-vitamin-d-exposure-predisposes-to-atrial-fibrillation
#14
Yap-Hang Chan, Kai-Hang Yiu, Jo Jo Hai, Pak-Hei Chan, Tai-Hing Lam, Ben J Cowling, Pak-Chung Sham, Chu-Pak Lau, Karen Siu-Ling Lam, Chung-Wah Siu, Hung-Fat Tse
Aims: Low vitamin D level is associated with atrial fibrillation (AF) and may be implicated in its pathogenesis. Methods and results: We studied single nucleotide polymorphisms (SNPs) of vitamin D mechanistic pathways and serum 25-hydroxyvitamin D [25(OH)D] levels in an age- and gender-matched case-control study (controls without AF: mean age 68.6 ± 8.7 years, female 25%; n = 1019; with AF: mean age 69.7 ± 9.5 years, female 30%; n = 156) recruited from a Chinese clinical cohort of patients with stable coronary artery disease...
December 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29217650/serum-and-urine-vitamin-d-metabolite-analysis-in-early-preeclampsia
#15
Jennifer Tamblyn, Carl Jenkinson, Dean Larner, Martin Hewison, Mark Kilby
Vitamin D-deficiency is common in pregnant women, and may contribute to adverse events in pregnancy such as preeclampsia (PET). To date, studies of vitamin D and PET have focused primarily on serum concentrations vitamin D, 25-hydroxyvitamin D3 (25(OH)D3) later in pregnancy. The aim here was to determine whether a more comprehensive analysis of vitamin D metabolites earlier in pregnancy could provide predictors of PET. Using samples from the SCOPE pregnancy cohort, multiple vitamin D metabolites were quantified by liquid chromatography-tandem mass spectrometry in paired serum and urine prior to the onset of PET symptoms...
December 7, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29217467/why-should-we-measure-free-25-oh-vitamin-d
#16
REVIEW
Oleg Tsuprykov, Xin Chen, Carl-Friedrich Hocher, LianghongYin, Berthold Hocher
Vitamin D, either in its D2 or D3 form, is essential for normal human development during intrauterine life, kidney function and bone health. Vitamin D deficiency has also been linked to cancer development and some autoimmune diseases. Given this huge impact of vitamin D on human health, it is important for daily clinical practice and clinical research to have reliable tools to judge on the vitamin D status. The major circulating form of vitamin D3 is 25-hydroxyvitamin D3 (25(OH)D), although is not the most active metabolite, the concentrations of total 25-hydroxy vitamin D3 in the serum are currently routinely used in clinical practice to assess vitamin D status...
December 4, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29216203/dose-responses-of-vitamin-d3-supplementation-on-arterial-stiffness-in-overweight-african-americans-with-vitamin-d-deficiency-a-placebo-controlled-randomized-trial
#17
Anas Raed, Jigar Bhagatwala, Haidong Zhu, Norman K Pollock, Samip J Parikh, Ying Huang, Robyn Havens, Ishita Kotak, De-Huang Guo, Yanbin Dong
BACKGROUND: Clinical trials are scant and equivocal on whether vitamin D can ameliorate arterial stiffness, particularly in populations at high risk for vitamin D deficiency and cardiovascular disease (CVD). This study determined the dose-response effects of vitamin D3 supplementation on arterial stiffness in overweight African Americans with vitamin D deficiency. METHODS: Seventy overweight African Americans (aged 13-45 years) with serum 25-hydroxyvitamin D [25(OH)D] levels ≤ 20 ng/mL were randomized to monthly oral supplementation of 18,000 IU (~600 IU/day, n = 17), 60,000 IU (~2000 IU/day, n = 18), or 120,000 IU (~4000 IU/day, n = 18) of vitamin D3 or placebo (n = 17) for 16-weeks...
2017: PloS One
https://www.readbyqxmd.com/read/29215595/the-role-of-vitamin-d-in-non-scarring-alopecia
#18
REVIEW
Agnieszka Gerkowicz, Katarzyna Chyl-Surdacka, Dorota Krasowska, Grażyna Chodorowska
Non-scarring hair loss is a common problem that affects both male and female patients. Since any disturbances in the hair follicle cycle may lead to hair shedding, or alopecia, it is not surprising that the possible role of vitamin D in alopecia was investigated in many studies. Vitamin D has been shown to have many important functions. A growing body of evidence shows that vitamin D and its receptor are responsible for maintaining not only calcium homeostasis but also skin homeostasis. Moreover, vitamin D could also regulate cutaneous innate and adaptive immunity...
December 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29212985/bone-formation-parameters-of-the-biopsied-ilium-differ-between-subtrochanteric-and-diaphyseal-atypical-femoral-fractures-in-bisphosphonate-treated-patients
#19
Naoki Kondo, Tomomi Fukuhara, Yo Watanabe, Dai Miyasaka, Noriaki Yamamoto, Hiroe Sato, Yoko Wada, Takeshi Nakatsue, Junichi Fujisawa, Mayumi Sakuma, Norio Imai, Takuya Yoda, Ichiei Narita, Naoto Endo
Atypical femoral fractures (AFFs) are defined as atraumatic or low-trauma fractures located in the subtrochanteric or diaphyseal sites. Long-term bisphosphonates (BPs) are administered to prevent fragility fractures in patients with primary osteoporosis or collagen diseases who are already taking glucocorticoids (GCs). Long-term BP use is one of the most important risk factors for AFFs. Its pathogenesis is characterized by severely suppressed bone turnover (SSBT), but whether the characteristics of patients are different regarding to location of fracture site remains unknown...
2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29212772/modifiable-pathways-in-alzheimer-s-disease-mendelian-randomisation-analysis
#20
Susanna C Larsson, Matthew Traylor, Rainer Malik, Martin Dichgans, Stephen Burgess, Hugh S Markus
OBJECTIVE: To determine which potentially modifiable risk factors, including socioeconomic, lifestyle/dietary, cardiometabolic, and inflammatory factors, are associated with Alzheimer's disease. DESIGN: Mendelian randomisation study using genetic variants associated with the modifiable risk factors as instrumental variables. SETTING: International Genomics of Alzheimer's Project. PARTICIPANTS: 17 008 cases of Alzheimer's disease and 37 154 controls...
December 6, 2017: BMJ: British Medical Journal
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