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1,25 hydroxyvitamin D

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https://www.readbyqxmd.com/read/29922939/a-decrease-in-vitamin-d-levels-is-associated-with-methotrexate-induced-oral-mucositis-in-children-with-acute-lymphoblastic-leukemia
#1
N Oosterom, N F Dirks, S G Heil, R de Jonge, W J E Tissing, R Pieters, M M van den Heuvel-Eibrink, A C Heijboer, S M F Pluijm
PURPOSE: Children with acute lymphoblastic leukemia (ALL) are at increased risk of vitamin D deficiency, which might make them more susceptible to developing adverse events. Previous studies showed that low vitamin D levels were associated with an increased inflammatory mucosal state and impaired mucosal tissue barriers. We examined the prevalence of vitamin D deficiency and studied the association between vitamin D levels and methotrexate (MTX)-induced oral mucositis in pediatric ALL...
June 19, 2018: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/29920594/winter-cholecalciferol-supplementation-at-51%C3%A2-n-has-no-effect-on-markers-of-cardiometabolic-risk-in-healthy-adolescents-aged-14-18-years
#2
Taryn J Smith, Laura Tripkovic, Hanne Hauger, Camilla T Damsgaard, Christian Mølgaard, Susan A Lanham-New, Kathryn H Hart
Background: Epidemiologic studies have supported inverse associations between low serum 25-hydroxyvitamin D [25(OH)D] and cardiometabolic risk markers, but few randomized trials have investigated the effect of vitamin D supplementation on these markers in adolescents. Objective: The objective of this study was to investigate the effect of winter-time cholecalciferol (vitamin D3) supplementation on cardiometabolic risk markers in white, healthy 14- to 18-y-old adolescents in the UK (51°N) as part of the ODIN Project...
June 15, 2018: Journal of Nutrition
https://www.readbyqxmd.com/read/29917069/winter-cholecalciferol-supplementation-at-55%C3%A2-n-has-no-effect-on-markers-of-cardiometabolic-risk-in-healthy-children-aged-4-8-years
#3
Hanne Hauger, Christian Mølgaard, Charlotte Mortensen, Christian Ritz, Hanne Frøkiær, Taryn J Smith, Kathryn Hart, Susan A Lanham-New, Camilla T Damsgaard
Background: Low serum 25-hydroxyvitamin D [25(OH)D] has been associated with unfavorable cardiometabolic risk profiles in many observational studies in children, but very few randomized controlled trials have investigated this. Objective: We explored the effect of winter-time cholecalciferol (vitamin D3) supplementation on cardiometabolic risk markers in young, white, 4- to 8-y-old healthy Danish children (55°N) as part of the pan-European ODIN project. Methods: In the ODIN Junior double-blind, placebo-controlled, dose-response trial, 119 children (mean ± SD age: 6...
June 15, 2018: Journal of Nutrition
https://www.readbyqxmd.com/read/29914625/differential-impacts-of-serum-vitamin-d-levels-and-age-at-menarche-on-metabolic-syndrome-in-premenopausal-and-postmenopausal-women-findings-from-the-korea-national-cohort
#4
Chan-Hee Jung, Ji-Oh Mok, Sung Woon Chang, Bora Lee, Ji Hyon Jang, Sukho Kang, Sang Hee Jung
It is suggested that vitamin D level and age at menarche are related to each other, and the prevalence of low vitamin D status and early menarche in women is increasing worldwide. Moreover, several studies revealed that both of them are associated with metabolic syndrome (MetS). Therefore, we hypothesized that there are significant associations among vitamin D status, age at menarche, and MetS and that the relationships differ according to menstrual state. We assessed whether the association among MetS, vitamin D, and menarche age is different between premenopausal and postmenopausal women and whether there is a change in risk of MetS according to vitamin D level in different age-at-menarche groups...
July 2018: Nutrition Research
https://www.readbyqxmd.com/read/29912394/circulating-vitamin-d-and-colorectal-cancer-risk-an-international-pooling-project-of-17-cohorts
#5
Marjorie L McCullough, Emilie S Zoltick, Stephanie J Weinstein, Veronika Fedirko, Molin Wang, Nancy R Cook, A Heather Eliassen, Anne Zeleniuch-Jacquotte, Claudia Agnoli, Demetrius Albanes, Matthew J Barnett, Julie E Buring, Peter T Campbell, Tess V Clendenen, Neal D Freedman, Susan M Gapstur, Edward L Giovannucci, Gary G Goodman, Christopher A Haiman, Gloria Y F Ho, Ronald L Horst, Tao Hou, Wen-Yi Huang, Mazda Jenab, Michael E Jones, Corinne E Joshu, Vittorio Krogh, I-Min Lee, Jung Eun Lee, Satu Männistö, Loic Le Marchand, Alison M Mondul, Marian L Neuhouser, Elizabeth A Platz, Mark P Purdue, Elio Riboli, Trude Eid Robsahm, Thomas E Rohan, Shizuka Sasazuki, Minouk J Schoemaker, Sabina Sieri, Meir J Stampfer, Anthony J Swerdlow, Cynthia A Thomson, Steinar Tretli, Schoichiro Tsugane, Giske Ursin, Kala Visvanathan, Kami K White, Kana Wu, Shiaw-Shyuan Yaun, Xuehong Zhang, Walter C Willett, Mitchel H Gail, Regina G Ziegler, Stephanie A Smith-Warner
Background: Experimental and epidemiological studies suggest a protective role for vitamin D in colorectal carcinogenesis, but evidence is inconclusive. Circulating 25-hydroxyvitamin D (25(OH)D) concentrations that minimize risk are unknown. Current Institute of Medicine (IOM) vitamin D guidance is based solely on bone health. Methods: We pooled participant-level data from 17 cohorts, comprising 5706 colorectal cancer case participants and 7107 control participants with a wide range of circulating 25(OH)D concentrations...
June 14, 2018: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/29911760/vitamin-d-supplementation-seems-to-improve-fibromyalgia-symptoms-preliminary-results
#6
J F de Carvalho, F A G da Rocha Araújo, L M A da Mota, R B Aires, R P de Araujo
BACKGROUND: Vitamin D deficiency and insufficiency have been reported in fibromyalgia. However, to the best of our knowledge, only one study has evaluated the role of 25-hydroxyvitamin D [25(OH)D] supplementation on fibromyalgia symptoms. OBJECTIVES: To analyze the effects of 3 months of 25(OH)D supplementation on symptoms of fibromyalgia. METHODS: This study included 11 female patient. Demographic and clinical data, tender points, visual analog scale results, and pre- and post-serum levels of 25(OH)D supplementation were analyzed...
June 2018: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/29911040/duration-of-casual-sunlight-exposure-necessary-for-adequate-vitamin-d-status-in-indian-men
#7
Vivek G Patwardhan, Zulf M Mughal, Shashi A Chiplonkar, Ann R Webb, Richard Kift, Vaman V Khadilkar, Raja Padidela, Anuradha V Khadilkar
Objectives: To investigate the duration of casual sunlight ultraviolet-B (UVB) exposure required to maintain optimal Vitamin D status (25-hydroxyvitamin-D [25(OH)D]) >50 nmol/L in urban Indian men, using polysulfone (PSU) dosimeters and a sunlight exposure questionnaire. Methods: In healthy men (aged 40-60 years) from Pune (18.52° N, 73.86° E), India, serum 25(OH)D was measured using enzyme-linked immunosorbent assay. Sunlight exposure was assessed using PSU dosimeter and by questionnaire...
March 2018: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29911039/determinants-of-vitamin-d-status-in-indian-school-children
#8
Rubina Mandlik, Neha Kajale, Veena Ekbote, Vivek Patwardhan, Vaman Khadilkar, Shashi Chiplonkar, Anuradha Khadilkar
Introduction: Due to the high prevalence of Vitamin D deficiency in spite of abundant sunshine and scarcity of studies investigating Vitamin D status in Indian children from rural and semirural areas, the objectives of this cross-sectional study were to: (1) assess the Vitamin D status of school-children in a semi-rural setting and (2) identify the determinants of Vitamin D status in these children. Materials and Methods: Data collected included anthropometric measurements (height and weight), body composition, three-one-day dietary recall method, demographic data, and sunlight exposure...
March 2018: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29909424/indoor-outdoor-and-night-work-and-blood-concentrations-of-vitamin-d-and-parathyroid-hormone
#9
Stine Daugaard, Anne Helene Garde, Åse Marie Hansen, Helene Tilma Vistisen, Lars Rejnmark, Henrik Albert Kolstad
Objectives The aim of this study was to examine blood concentrations of 25-hydroxyvitamin D (25OHD) and parathyroid hormone (PTH) among indoor, outdoor, permanent and rotating night workers and the association with hours spent outdoors on and off work days. Methods Blood samples were collected from 425 workers (162 indoor, 112 outdoor, 118 rotating night and 33 permanent night workers) throughout all seasons. Serum concentrations of 25-hydroxyvitamin D (25OHD) and parathyroid hormone (PTH) were analyzed by isotope dilution liquid chromatography-tandem mass spectrometry (LC MS/MS) and an automated immune analyzer, respectively...
June 17, 2018: Scandinavian Journal of Work, Environment & Health
https://www.readbyqxmd.com/read/29906273/breast-cancer-risk-markedly-lower-with-serum-25-hydroxyvitamin-d-concentrations-%C3%A2-60-vs-20-ng-ml-150-vs-50-nmol-l-pooled-analysis-of-two-randomized-trials-and-a-prospective-cohort
#10
Sharon L McDonnell, Carole A Baggerly, Christine B French, Leo L Baggerly, Cedric F Garland, Edward D Gorham, Bruce W Hollis, Donald L Trump, Joan M Lappe
BACKGROUND: While numerous epidemiologic studies have found an association between higher serum 25-hydroxyvitamin D [25(OH)D] concentrations and lower breast cancer risk, few have assessed this association for concentrations >40 ng/ml. OBJECTIVE: To investigate the relationship between 25(OH)D concentration and breast cancer risk across a broad range of 25(OH)D concentrations among women aged 55 years and older. METHODS: Analyses used pooled data from two randomized clinical trials (N = 1129, N = 2196) and a prospective cohort (N = 1713) to examine a broad range of 25(OH)D concentrations...
2018: PloS One
https://www.readbyqxmd.com/read/29904567/serum-25-hydroxyvitamin-d-levels-in-patients-with-skin-diseases-including-psoriasis-infections-and-atopic-dermatitis
#11
Ulrich Amon, Laura Baier, Raul Yaguboglu, Madeleine Ennis, Michael F Holick, Julian Amon
The pathogenetic role of vitamin D as well as its clinical correlation in inflammatory skin diseases is still uncertain. This study aimed to compare serum levels of 25(OH) vitamin D (calcidiol) in outpatients suffering from different skin diseases using the same laboratory method in one study. In routine serum samples of 1,532 patients from the previous 12 months we identified retrospectively 180 (mean age 49.4 years, 80 female, 100 male) and 205 (mean age 36.3 years, 116 female, 89 male) patients with psoriasis (PSO) and atopic dermatitis (AD), respectively...
2018: Dermato-endocrinology
https://www.readbyqxmd.com/read/29899389/calcitriol-trend-following-pediatric-cardiac-surgery-and-association-with-clinical-outcome
#12
Nina Acharya, Dermot R Doherty, Nick Barrowman, Gyaandeo Maharajh, Tara Girolamo, Katie O'Hearn, J Dayre McNally
BACKGROUND: Consistent with accepted practice in stable ambulatory populations, the majority of ICU research has evaluated vitamin D status using a single blood 25-hydroxyvitamin D (25(OH)D) level. Only a limited number of ICU studies have measured the active hormone, 1,25-dihydroxyvitamin D (calcitriol) and none have used change in calcitriol levels to evaluate axis functioning. The objective of this study was to describe the impact of Congenital Heart Disease (CHD) surgery on calcitriol levels and evaluate the relationship between change in postoperative levels and clinical course...
June 13, 2018: Pediatric Research
https://www.readbyqxmd.com/read/29897832/serum-25-hydroxyvitamin-d-and-risk-of-self-reported-bacterial-vaginosis-in-a-prospective-cohort-study-of-young-african-american-women
#13
Kristen R Moore, Quaker E Harmon, Donna D Baird
BACKGROUND: Bacterial vaginosis (BV), the leading cause of vaginal discharge, is associated with multiple adverse health outcomes; however, its etiology is unknown. BV treatment is not very effective, thus prevention approaches are needed. Studies investigating the impact of vitamin D on the risk of BV have had mixed findings, including two studies reporting increased risk of recurrent BV for women with higher vitamin D. MATERIALS AND METHODS: Participants were nonpregnant women in a prospective fibroid study of African Americans (ages 23-34 years) from the Detroit area...
June 13, 2018: Journal of Women's Health
https://www.readbyqxmd.com/read/29897564/cholecalciferol-supplementation-promotes-bone-turnover-in-chinese-adults-with-vitamin-d-deficiency
#14
Pang Yao, Liang Sun, Quan Xiong, Xinming Xu, Huaixing Li, Xu Lin
Background: Bone turnover markers (BTMs) are proposed as alternative indicators for bone mineral density in diagnosis and management of osteoporosis. However, little is known about the effects of vitamin D supplementation on BTMs in nonwhite populations. Objective: We aimed to investigate the responses in BTMs after vitamin D supplementation in Asians. Methods: In this secondary data analysis of a randomized, double-blind, placebo-controlled trial, 448 Chinese adults [mean ± SD age: 31...
April 20, 2018: Journal of Nutrition
https://www.readbyqxmd.com/read/29892565/the-genetic-determinants-of-circulating-c3-epimers-of-25-hydroxyvitamin-d
#15
Sirikunya Torugsa, Hataikarn Nimitphong, Daruneewan Warodomwichit, La-Or Chailurkit, Kriangsuk Srijaruskul, Suwannee Chanprasertyothin, Boonsong Ongphiphadhanakul
Background: The complexity of vitamin D metabolites especially the contribution of C3-epimers of 25-hydroxyvitamin D (C3-epimers) in human sera remains unclear. We hypothesized that genetic polymorphisms in the vitamin D-related gene pathway contribute to variation in C3-epimer levels. Therefore, we investigated candidate single nucleotide polymorphisms (SNPs) concerning C3-epimer levels. Methods: The candidate SNPs, including DHCR7/NADSYN1 (rs12785878), CYP2R1 (rs2060793) and GC (rs2282679), were genotyped in 1727 members of the third project of the Electricity Generating Authority of Thailand 3/1 cohort investigation...
June 2018: Journal of Clinical & Translational Endocrinology
https://www.readbyqxmd.com/read/29889866/a-novel-inverse-association-between-cord-25-hydroxyvitamin-d-and-leg-length-in-boys-up-to-three-years-an-odense-child-cohort-study
#16
Mathilde Egelund Christensen, Signe Sparre Beck-Nielsen, Christine Dalgård, Søs Dragsbæk Larsen, Sine Lykkedegn, Henriette Boye Kyhl, Steffen Husby, Henrik Thybo Christesen
BACKGROUND AND AIM: Long standing vitamin D deficiency in children causes rickets with growth impairment. We investigated whether sub-ischial leg length (SLL) is shorter, and cephalo-caudal length:length (CCL:L) ratio and sitting height:height (SH:H) ratio larger, with lower cord s-25-hydroxyvitamin D (25OHD) in the population-based prospective Odense Child Cohort, Denmark. METHODS: We included healthy singletons born to term with available measures of cord 25OHD and anthropometrics up to three years' age...
2018: PloS One
https://www.readbyqxmd.com/read/29885925/serum-calcitriol-concentrations-and-kidney-function-decline-heart-failure-and-mortality-in-elderly-community-living-adults-the-health-aging-and-body-composition-study
#17
Umut Selamet, Ronit Katz, Charles Ginsberg, Dena E Rifkin, Linda F Fried, Stephen B Kritchevsky, Andrew N Hoofnagle, Kirsten Bibbins-Domingo, David Drew, Tamara Harris, Anne Newman, Orlando M Gutiérrez, Mark J Sarnak, Michael G Shlipak, Joachim H Ix
RATIONALE & OBJECTIVES: Lower 25-hydroxyvitamin D concentrations have been associated with risk for kidney function decline, heart failure, and mortality. However, 25-hydroxyvitamin D requires conversion to its active metabolite, calcitriol, for most biological effects. The associations of calcitriol concentrations with clinical events have not been well explored. STUDY DESIGN: Case-cohort study. SETTING & PARTICIPANTS: Well-functioning community-living older adults aged 70 to 79 years at inception who participated in the Health, Aging, and Body Composition (Health ABC) Study...
June 6, 2018: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/29878035/estimation-of-the-maternal-vitamin-d-intake-that-maintains-circulating-25-hydroxyvitamin-d-in-late-gestation-at-a-concentration-sufficient-to-keep-umbilical-cord-sera-%C3%A2-25-30-nmol-l-a-dose-response-double-blind-randomized-placebo-controlled-trial-in-pregnant
#18
Karen M O'Callaghan, Áine Hennessy, George Lj Hull, Karina Healy, Christian Ritz, Louise C Kenny, Kevin D Cashman, Mairead E Kiely
Background: In the absence of dose-response data, Dietary Reference Values for vitamin D in nonpregnant adults are extended to pregnancy. Objective: The aim was to estimate vitamin D intake needed to maintain maternal 25-hydroxyvitamin D [25(OH)D] in late gestation at a concentration sufficient to prevent newborn 25(OH)D <25-30 nmol/L, a threshold indicative of increased risk of nutritional rickets. Design: We conducted a 3-arm, dose-response, double-blind, randomized placebo-controlled trial in Cork, Ireland (51...
June 6, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29878034/calcium-absorption-may-be-affected-after-either-sleeve-gastrectomy-or-roux-en-y-gastric-bypass-in-premenopausal-women-a-2-y-prospective-study
#19
Fernando Carrasco, Karen Basfi-Fer, Pamela Rojas, Attila Csendes, Karin Papapietro, Juana Codoceo, Jorge Inostroza, Nancy F Krebs, Jamie L Westcott, Leland V Miller, Manuel Ruz
Background: Although Roux-en-Y gastric bypass (RYGBP) is known to reduce calcium absorption (CA), the effects of vertical sleeve gastrectomy (SG) and its long-term implications on CA have not yet been studied. Objective: The aim of this study was to evaluate changes in CA and its relation with modifications of bone mineral density (BMD), intakes of calcium and vitamin D, vitamin D status, and parathyroid hormone (PTH) concentrations ≤24 mo after SG and RYGBP, respectively...
June 6, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29868916/effects-of-vitamin-d-supplementation-on-markers-for-cardiovascular-disease-and-type-2-diabetes-an-individual-participant-data-meta-analysis-of-randomized-controlled-trials
#20
Karin Ma Swart, Paul Lips, Ingeborg A Brouwer, Rolf Jorde, Martijn W Heymans, Guri Grimnes, Martin R Grübler, Martin Gaksch, Andreas Tomaschitz, Stefan Pilz, Gudny Eiriksdottir, Vilmundur Gudnason, Louise Wamberg, Lars Rejnmark, Christopher T Sempos, Ramón A Durazo-Arvizu, Kirsten G Dowling, George Hull, Zuzana Škrabáková, Mairead Kiely, Kevin D Cashman, Natasja M van Schoor
Background: Evidence from randomized controlled trials (RCTs) for the causal role of vitamin D on noncommunicable disease outcomes is inconclusive. Objective: The aim of this study was to investigate whether there are beneficial or harmful effects of cholecalciferol (vitamin D3) supplementation according to subgroups of remeasured serum 25-hydroxyvitamin D [25(OH)D] on cardiovascular and glucometabolic surrogate markers with the use of individual participant data (IPD) meta-analysis of RCTs...
June 1, 2018: American Journal of Clinical Nutrition
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