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1,25 hydroxyvitamin D

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https://www.readbyqxmd.com/read/29457022/a-case-report-of-compound-heterozygous-cyp24a1-mutations-leading-to-nephrolithiasis-successfully-treated-with-ketoconazole
#1
Emma Davidson Peiris, Raghav Wusirika
CYP24A1 is an enzyme that inactivates vitamin D. Loss-of-function mutations in this enzyme are rare but have been linked with idiopathic infantile hypercalcemia as well as adult-onset nephrocalcinosis and nephrolithiasis. Genetic testing for this mutation should be considered in the presence of calciuria, elevated serum calcium, elevated 1,25-dihydroxyvitamin D, and suppressed parathyroid hormone. We present a case with these lab findings as well as an elevated 25-hydroxyvitamin D/24,25-dihydroxyvitamin D ratio in whom compound heterozygous CYP24A1 mutations were found...
September 2017: Case Reports in Nephrology and Dialysis
https://www.readbyqxmd.com/read/29453514/prevalence-and-determinants-of-vitamin-d-deficiency-among-the-overweight-and-obese-singaporeans-seeking-weight-management-including-bariatric-surgery-a-relationship-with-bone-health
#2
Marc Weijie Ong, Chun Hai Tan, Anton Kui Sing Cheng
PURPOSE: Low vitamin D status is prevalent worldwide and has been linked to a variety of pathologies including obesity in adults. The severity of vitamin D deficiency amongst the overweight and obese Singaporeans is not well documented. The purpose of this prospective observational study was to assess the prevalence and determinants of vitamin D deficiency in a multi-ethnic Asian population referred for weight management, including those seeking bariatric surgery. MATERIALS AND METHODS: This was a cross-sectional study conducted among 111 consecutive subjects referred to a single institution weight management service in Singapore...
February 16, 2018: Obesity Surgery
https://www.readbyqxmd.com/read/29453201/hypercalcemia-associated-with-cosmetic-injections-a-systematic-review
#3
Niranjan Tachamo, Anthony Donato, Bidhya Timilsina, Salik Nazir, Saroj Lohani, Rashmi Dhital, Sijan Basnet
Cosmetic injections with silicone and polymethylmethacrylate are not FDA-approved for augmentation of body parts such as breast, buttock or legs, but they have been widely used for decades. Cosmetic injections can cause foreign body granulomas and occasionally severe and life-threatening hypercalcemia. We aimed to systematically analyze the published literature on cosmetic injection-associated hypercalcemia. Methods We searched relevant articles on hypercalcemia associated with various cosmetic injections and extracted relevant data on demographics, cosmetic injections used, severity of hypercalcemia, management and outcomes...
February 16, 2018: European Journal of Endocrinology
https://www.readbyqxmd.com/read/29450728/winter-vitamin-d-3-supplementation-does-not-increase-muscle-strength-but-modulates-the-igf-axis-in-young-children
#4
Charlotte Mortensen, Christian Mølgaard, Hanne Hauger, Michael Kristensen, Camilla T Damsgaard
PURPOSE: To explore whether muscle strength, the insulin-like growth factor axis (IGF-axis), height, and body composition were associated with serum 25-hydroxyvitamin D [25(OH)D] and affected by winter vitamin D supplementation in healthy children, and furthermore to explore potential sex differences. METHODS: We performed a double-blind, placebo-controlled, dose-response winter trial at 55ºN. A total of 117 children aged 4-8 years were randomly assigned to either placebo, 10, or 20 µg/day of vitamin D 3 for 20 weeks...
February 15, 2018: European Journal of Nutrition
https://www.readbyqxmd.com/read/29450585/effect-of-isolated-vitamin-d-supplementation-on-bone-turnover-markers-in-younger-postmenopausal-women-a-randomized-double-blind-placebo-controlled-trial
#5
J Nahas-Neto, L M Cangussu, C L Orsatti, F N Bueloni-Dias, P F Poloni, E B Schmitt, E A P Nahas
Vitamin D (VD) plays an important role in bone mineralization. The present study investigates the effect of VD supplementation alone on bone turnover markers in younger postmenopausal women. It has been shown that VD supplementation in postmenopausal women with hypovitaminosis D is associated with a reduction in bone turnover markers. PURPOSE: The purpose of this study is to evaluate the effect of VD supplementation alone on bone turnover markers in younger postmenopausal women. METHODS: In this double-blind, placebo-controlled trial, 160 women were randomized into the VD group (supplementation with 1000 IU of vitamin D3/day, orally; n = 80) or placebo group (n = 80)...
February 15, 2018: Osteoporosis International
https://www.readbyqxmd.com/read/29439698/a-retrospective-analysis-of-bone-mineral-status-in-patients-requiring-spinal-surgery
#6
Tobias Schmidt, Katharina Ebert, Tim Rolvien, Nicola Oehler, Jens Lohmann, Luca Papavero, Ralph Kothe, Michael Amling, Florian Barvencik, Haider Mussawy
BACKGROUND: Impaired bone quality is associated with poor outcome of spinal surgery. The aim of the study was to assess the bone mineral status of patients scheduled to undergo spinal surgery and to report frequencies of bone mineral disorders. METHODS: We retrospectively analyzed the bone mineral status of 144 patients requiring spinal surgery including bone mineral density by dual-energy X-ray absorptiometry (DXA) as well as laboratory data with serum levels of 25-hydroxyvitamin D (25-OH-D), parathyroid hormone, calcium, bone specific alkaline phosphate, osteocalcin, and gastrin...
February 13, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29439677/trajectory-of-vitamin-d-status-during-pregnancy-in-relation-to-neonatal-birth-size-and-fetal-survival-a-prospective-cohort-study
#7
Linnea Bärebring, Maria Bullarbo, Anna Glantz, Lena Hulthén, Joy Ellis, Åse Jagner, Inez Schoenmakers, Anna Winkvist, Hanna Augustin
BACKGROUND: We investigated the associations between vitamin D status in early and late pregnancy with neonatal small for gestational age (SGA), low birth weight (LBW) and preterm delivery. Furthermore, associations between vitamin D status and pregnancy loss were studied. METHODS: Serum 25-hydroxyvitamin D (25OHD) was sampled in gestational week ≤ 16 (trimester 1 (T1), N = 2046) and > 31 (trimester 3 (T3), N = 1816) and analysed using liquid chromatography tandem mass spectrometry...
February 13, 2018: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29438455/vitamin-d-status-and-attention-deficit-hyperactivity-disorder-a-systematic-review-and-meta-analysis-of-observational-studies
#8
Yadollah Khoshbakht, Reza Bidaki, Amin Salehi-Abargouei
An association between vitamin D and attention deficit hyperactivity disorder (ADHD) has been proposed by several researchers in recent years; however, the investigations have led to inconsistent results. The present study was conducted to summarize the published observational data on the relation between vitamin D status and the likelihood of ADHD. Online databases, including PubMed, the ISI Web of Science, Google Scholar, and Scopus, were checked up to June 2017 for relevant observational studies. A random-effects model was incorporated to summarize the study results...
January 1, 2018: Advances in Nutrition
https://www.readbyqxmd.com/read/29429539/poor-vitamin-d-status-increases-the-risk-of-anemia-in-school-children-national-food-and-nutrition-surveillance
#9
Bahareh Nikooyeh, Tirang R Neyestani
OBJECTIVES: This study aimed to investigate the association between 25-hydroxyvitamin D (25[OH]D) concentrations and the risk of anemia in a large cohort of children with consideration for the effects of sex, body mass index (BMI), serum intact parathyroid hormone (iPTH) concentrations, and iron level status. METHODS: A total of 937 children (493 boys, 444 girls) ages 9 to 12 y were enrolled in a cross-sectional study. The children underwent various examinations including anthropometric measurements and blood sampling...
March 2018: Nutrition
https://www.readbyqxmd.com/read/29425250/25-hydroxyvitamin-d-influenza-vaccine-response-and-healthcare-encounters-among-a-young-adult-population
#10
Rachel U Lee, Seung Hyun Won, Christian Hansen, Nancy F Crum-Cianflone
BACKGROUND: Influenza causes significant morbidity and mortality; the pandemic in 2009-2010 was a reminder of the potential for novel strains and antigenic changes. Studies have shown that vitamin D deficiency may be associated with poor vaccine immunogenicity, therefore we sought to determine if there was a correlation between 25-hydroxyvitamin D [25(OH)D] and influenza vaccine response. METHODS: A retrospective observational study was conducted among young, healthy military members to evaluate the association between total 25(OH)D levels with post influenza vaccination antibody titers and healthcare encounters during the 2009-10 influenza season...
2018: PloS One
https://www.readbyqxmd.com/read/29422004/vitamin-d-and-subjective-memory-complaint-in-community-dwelling-older-adults
#11
Cedric Annweiler, Lise Doineau, Lucie Gerigne, Anais Provendier, Spyridon N Karras, Olivier Beauchet, Bruno Fantino, Guillaume T Duval
BACKGROUND: Older adults with hypovitaminosis D report more often subjective cognitive complaints, especially with regards to memory. This raises prospects that vitamin D may improve older adults' subjective experience of memory disorders. OBJECTIVE: To determine among older community-dwellers whether higher serum 25-hydroxyvitamin D (25OHD) concentrations were associated with fewer memory complaints, while considering the different subtypes of memory complaints...
February 1, 2018: Current Alzheimer Research
https://www.readbyqxmd.com/read/29419533/effect-of-treating-vitamin-d-deficiency-in-uncontrolled-type-2-diabetes-a-randomized-placebo-controlled-study
#12
Margaret C Lo, Layla Abushamat, Lazarus K Mramba
BACKGROUND: Literature increasingly supports the inverse relationship of vitamin D (VitD) level and type 2 diabetes (T2DM). Proposed protective mechanisms of VitD include its anti-inflammatory effects, increased insulin secretion via pancreatic β-cell stimulation, and downregulation of parathyroid hormone levels. Interventional studies show mixed results of VitD therapy in prediabetic patients with VitD deficiency or diabetic patients with normal VitD levels. STUDY QUESTION: Does high-dose VitD replacement improve glycemic control and microalbuminuria (MAU) in uncontrolled T2DM and concurrent VitD deficiency? STUDY DESIGN: This placebo-controlled, double-blinded study randomized 30 subjects aged 30-65 years with an elevated HbA1c level of 7...
February 5, 2018: American Journal of Therapeutics
https://www.readbyqxmd.com/read/29415666/influence-of-vitamin-d-receptor-polymorphisms-on-biochemical-markers-of-mineral-bone-disorders-in-south-african-patients-with-chronic-kidney-disease
#13
Bala Waziri, Therese Dix-Peek, Caroline Dickens, Raquel Duarte, Saraladevi Naicker
BACKGROUND: It remains unclear whether genetic factors may explain the reported variation in the levels of biochemical markers of chronic kidney disease mineral and bone disorders (CKD- MBD) across ethnic groups. Therefore, the aim of this study was to examine the influence of vitamin D receptor (VDR) polymorphisms on secondary hyperparathyroidism and its association with vitamin D levels in black and white South African study participants. METHODS: This was a cross sectional study involving 272 CKD stage 3- 5D patients and 90 healthy controls...
February 7, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29412807/association-between-vitamin-d-level-and-or-deficiency-and-systemic-lupus-erythematosus-a-meta-analysis
#14
Sang-Cheol Bae, Young Ho Lee
This study aimed to evaluate the relationship between the level of 25-hydroxyvitamin D [25(OH)D] and systemic lupus erythematosus (SLE). We searched the PUBMED, EMBASE, and Cochrane databases and performed a meta-analysis examining the vitamin D level and/or deficiency in patients with SLE, compared with that in healthy controls. In total, 18 studies consisting of 1,083 patients with SLE and 1,273 controls were included. Vitamin D level was significantly lower in the SLE group than in the control group (standardized mean difference [SMD] = -0...
January 31, 2018: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/29411726/association-between-the-oxidative-status-vitamin-d-levels-and-respiratory-function-in-asthmatic-children
#15
M Igde, P Baran, B G Oksuz, S Topcuoglu, G Karatekin
AIM: We studied the relationship between plasma concentrations of oxidative system markers, vitamin D, and respiratory functions in children with asthma. MATERIALS AND METHODS: Ninety one children aged 6-17 years with stable asthma seen in the clinic had the serum concentrations of oxidative system markers [total antioxidant capacity (TAC), total oxidative status (TOS), paraoxonase-1 activity (PON-1), and 25-hydroxyvitamin D3] and respiratory functions were measured...
January 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29411311/relationship-between-25-hydroxyvitamin-d-and-lipid-profile-in-lebanese-school-children
#16
M H Gannagé-Yared, R Sabbagh, R Chédid
PURPOSE: Limited information is available regarding the association of vitamin D and lipid profile in pediatric populations. The objective of this cross-sectional study is to determine the prevalence of vitamin D deficiency in a large sample of Lebanese schoolchildren and to evaluate the relationship between vitamin D and lipid profile. METHODS: 969 Lebanese schoolchildren (505 boys and 464 girls) aged 8-18 years were recruited from 10 schools of different socioeconomic status (SES)...
February 6, 2018: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29409175/vitamin-d-levels-in-577-consecutive-elective-foot-ankle-surgery-patients
#17
Randeep S Aujla, Patricia E Allen, William J Ribbans
BACKGROUND: Vitamin D deficiency is a global concern impacting upon large communities and certain disease populations. It can adversely affect the outcome of orthopaedic operations. We aimed to perform an audit of the Vitamin D status of patients in two centres in the United Kingdom undergoing elective foot and ankle surgery. METHODS: Serum 25-hydroxyvitamin-D (vitamin D) levels were obtained prospectively in 577 consecutive elective patients undergoing elective foot and ankle surgery between October 2014 and March 2017 (29 months)...
December 23, 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29409006/vitamin-d-status-and-intakes-and-their-association-with-cognitive-trajectory-in-a-longitudinal-study-of-urban-adults
#18
May A Beydoun, Sharmin Hossain, Marie T Fanelli-Kuczmarski, Hind A Beydoun, Jose-Atilio Canas, Michele K Evans, Alan B Zonderman
Context: Serum 25-hydroxyvitamin D [25(OH)D], dietary and supplemental vitamin D may influence cognitive outcomes. Objectives: Sex/age-specific and race-specific associations of vitamin D status and intake were examined with longitudinal change in various cognitive domains in a large sample of ethnically and socio-economically diverse US urban adults. Design: Two prospective waves of data from Healthy Aging in Neighborhoods of Diversity across the Life Span (HANDLS) study were used...
February 1, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29406999/serum-cholecalciferol-may-be-a-better-marker-of-vitamin-d-status-than-25-hydroxyvitamin-d
#19
Rolf Jorde, G Grimnes
Vitamin D is produced in the skin upon sun-exposure or obtained through the diet. Vitamin D is hydroxylated to 25-hydroxyvitamin D (25(OH)D) in the liver and to the active form 1,25-dihydroxyvitamin D (1,25(OH) 2 D) in the kidneys. To exert its effect 1,25(OH) 2 D has to bind to the nuclear vitamin D receptor VDR. Lack of vitamin D leads to rickets in children and to osteomalacia in adults. 25(OH)D is used as a marker of a subject's vitamin D status. Low serum 25(OH)D levels are associated with a number of diseases, risk factors for disease and increased mortality...
February 2018: Medical Hypotheses
https://www.readbyqxmd.com/read/29405447/nutritional-therapy-complications-in-children-with-ultra-short-bowel-syndrome-include-growth-deficiency-but-not-cholestasis
#20
Katarzyna Olszewska, Janusz Ksiazyk, Dariusz Kozlowski, Magdalena Pajdowska, Malgorzata Janusz, Maciej Jaworski
AIM: Children with ultra-short bowel syndrome (USBS) have not been extensively studied to date because the condition is rare. The aim of the study was to assess the nutritional status of children with USBS receiving home parenteral nutrition, by using citrulline serum concentration and cholestasis. METHODS: We studied 17 patients with USBS, with a median age of 6.6 years and median duration of parenteral nutrition of 6.6 years. The study was carried out at The Children's Memorial Health Institute, Warsaw, from January 2014 to January 2015...
February 6, 2018: Acta Paediatrica
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