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1,25 hydroxyvitamin D

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https://www.readbyqxmd.com/read/29042866/effects-of-cord-blood-vitamin-d-levels-on-the-risk-of-neonatal-sepsis-in-premature-infants
#1
Birgul Say, Nurdan Uras, Suzan Sahin, Halil Degirmencioglu, Serife Suna Oguz, Fuat Emre Canpolat
PURPOSE: Vitamin D plays a key role in immune function. Vitamin D deficiency may play a role in the pathogenesis of infections, and low levels of circulating vitamin D are strongly associated with infectious diseases. In this study, we aimed to evaluate the effects of low vitamin D levels in cord blood on neonatal sepsis in preterm infants. METHODS: One hundred seventeen premature infants with gestational age of <37 weeks were enrolled. In the present study, severe vitamin D deficiency (group 1) was defined as a 25-hydroxyvitamin D (25(OH)D) concentration <5 ng/mL; vitamin D insufficiency (group 2), 25(OH)D concentration ≥5 ng/mL and <15 ng/mL; and vitamin D sufficiency (group 3), 25(OH)D concentration ≥15 ng/mL...
August 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/29040128/single-dose-preoperative-vitamin-d-supplementation-decreases-infection-in-a-mouse-model-of-periprosthetic-joint-infection
#2
Vishal Hegde, Erik M Dworsky, Alexandra I Stavrakis, Amanda H Loftin, Stephen D Zoller, Howard Y Park, Sherif Richman, Daniel Johansen, Yan Hu, Julie A Taylor, Christopher D Hamad, Rene F Chun, Weixian Xi, John S Adams, Nicholas M Bernthal
BACKGROUND: Despite recent advances, infection remains the most common etiology of arthroplasty failure. Recent work suggests that 25-hydroxyvitamin D (25D) deficiency correlates with the frequency of periprosthetic joint infection (PJI). We endeavored to examine whether 25D3 deficiency leads to increased bacterial burden in vivo in an established mouse model of PJI and, if so, whether this effect can be reversed by preoperative 25D3 supplementation. METHODS: Mice (lys-EGFP) possessing fluorescent neutrophils were fed a vitamin D3-sufficient (n = 20) or deficient (n = 40) diet for 6 weeks...
October 18, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29037174/vitamin-d-supplementation-as-a-potential-cause-of-u-shaped-associations-between-vitamin-d-levels-and-negative-health-outcomes-a-decision-tree-analysis-for-risk-of-frailty
#3
Gotaro Kojima, Steve Iliffe, Marianne Tanabe
BACKGROUND: A recent controversy in vitamin D research is a "U-shaped association", with elevated disease risks at both high and low 25-hydroxyvitamin D (25 (OH) D) levels. METHODS: This is a cross-sectional study of 238 male nursing home veterans in Hawaii. Classification and regression tree (CART) analysis identified groups based on 25 (OH) D and vitamin D supplementation for frailty risk. Characteristics were examined and compared across the groups using logistic regression and receiver operating characteristic (ROC) curve analyses...
October 16, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/29035877/association-of-maternal-serum-25-hydroxyvitamin-d-concentrations-with-risk-of-gestational-anemia
#4
Yingdi Yuan, Zhiyong Cai, YaoYao Dai, Qin Hong, Xingyun Wang, Lijun Zhu, Pengfei Xu, Lianghui You, Xing Wang, Chenbo Ji, Juan Wen, Xirong Guo
BACKGROUND/AIMS: Vitamin D deficiency has been shown to be associated with a greater prevalence of anemia in various healthy and diseased populations by a great deal of observational studies. However, less work has been done to explore this association in pregnant women. The aim of this study was to evaluate the association between maternal serum 25-hydroxyvitamin D [25(OH)D] concentrations and risk of gestational anemia in a large, nested case-control study. METHODS: The serum 25(OH)D concentrations was measured by enzyme immunoassay in 775 pregnant women affected with anemia and 1550 controls...
October 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29031688/vitamin-d-deficiency-is-associated-with-poor-breast-cancer-prognostic-features-in-postmenopausal-women
#5
Benedito de Sousa Almeida-Filho, Heloisa De Luca Vespoli, Eduardo Carvalho Pessoa, Murilo Machado, Jorge Nahas-Neto, Eliana Aguiar Petri Nahas
This study aimed to evaluate the association between pretreatment vitamin D (VD) deficiency with breast cancer prognostic features in Brazilian postmenopausal women. An analytical cross sectional study was conducted with 192 women, aged 45-75 years, attended at University Hospital. Women with recent diagnosis of breast cancer, in amenorrhea >12months and age ≥45 years, without medication use or clinical conditions that interfere with VD values were included. Clinical and anthropometric data were collected...
October 11, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29030560/risk-of-sarcopenia-and-osteoporosis-in-male-tuberculosis-survivors-korea-national-health-and-nutrition-examination-survey
#6
Chang-Jin Choi, Whan-Seok Choi, Churl-Min Kim, Sook-Young Lee, Kyung-Soo Kim
Short-term prospective studies have suggested that pulmonary tuberculosis (TB) preludes permanent loss of lean tissue and fat mass even when TB treatment is effective. The aim of this study was to estimate the risk of sarcopenia and osteoporosis among Korean male TB survivors. Data of the population-based, Korea National Health and Nutrition Examination Survey (KNHANES) (2008-2011) were analyzed, including 3,228 males aged 50 years or older who underwent chest X-ray (CXR) and dual-energy x-ray absorptiometry (DEXA)...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29029193/sex-and-iron-modify-fibroblast-growth-factor-23-fgf23-concentration-in-1-year-old-children
#7
Elisa Holmlund-Suila, Maria Enlund-Cerullo, Saara Valkama, Helena Hauta-Alus, Jenni Rosendahl, Otto Helve, Timo Hytinantti, Heli Viljakainen, Sture Andersson, Outi Mäkitie
Context: Fibroblast growth factor 23 (FGF23) plays an important role in phosphate homeostasis but its regulation is inadequately characterized. Objective: To examine regulators of FGF23, especially sex and iron status, in early childhood. Design: A cross-sectional study involving 1-year-old children. Setting and participants: Healthy term infants with a birth weight appropriate for gestational age were recruited to an ongoing vitamin D trial at the Kätilöopisto Maternity Hospital, Helsinki, Finland...
October 5, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29029099/biomarkers-of-mineral-and-bone-metabolism-and-20-year-risk-for-hospitalization-with-infection-the-aric-study
#8
Junichi Ishigami, Bernard G Jaar, Casey M Rebholz, Morgan E Grams, Erin D Michos, Myles Wolf, Csaba P Kovesdy, Shinichi Uchida, Josef Coresh, Pamela L Lutsey, Kunihiro Matsushita
Context: Mineral and bone disorders (MBD) may be relevant in the etiology of infection. Objective: To determine whether MBD biomarkers were associated with incidence of hospitalization with infection. We also assessed the cross-sectional association between levels of MBD biomarkers and kidney function. Design: Setting, Participants: Community-based cohort study using 11,218 participants with estimated glomerular filtration rate (eGFR) ≥30 ml/min/1...
September 27, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29029097/impact-of-three-doses-of-vitamin-d3-on-serum-25-oh-d-deficiency-and-insufficiency-in-at-risk-schoolchildren
#9
Jennifer M Sacheck, Maria I Van Rompay, Virginia R Chomitz, Christina D Economos, Misha Eliasziw, Elizabeth Goodman, Catherine M Gordon, Michael F Holick
Objective: We investigated the daily dose of vitamin D needed to achieve serum 25-hydroxyvitamin D [25(OH)D] sufficiency among schoolchildren at-risk for deficiency. Study Design: The Daily D Health Study was a randomized double-blind vitamin D supplementation trial among racially/ethnically diverse schoolchildren (n=685) in the northeastern U.S. Children were supplemented with vitamin D3 at 600, 1000, or 2000 IU/day for six months. Measurements included serum 25(OH)D at baseline (Oct-Dec), 3 months (Jan-March), 6 months (April-June), and 12 months (6 months post-supplementation)...
September 27, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29026487/seasonal-variations-and-correlations-between-vitamin-d-and-total-testosterone-levels
#10
Moo-Yeol Sim, Soo-Hyun Kim, Kwang-Min Kim
BACKGROUND: Some studies have provided evidence for a possible association between vitamin D and testosterone levels; however, the evidence from studies in Koreans is inconsistent. In addition, insufficient evidence is available to support an association between seasonal variations in vitamin D and testosterone levels in Koreans. Therefore, we aimed to investigate the association between vitamin D and testosterone levels, and between seasonal variations in these levels in Korean men. METHODS: This cross-sectional study included 1,559 men, aged 25-86 years, who underwent a medical examination...
September 2017: Korean Journal of Family Medicine
https://www.readbyqxmd.com/read/29026419/effect-of-vitamin-d-deficiency-treatment-on-thyroid-function-and-autoimmunity-markers-in-hashimoto-s-thyroiditis-a-double-blind-randomized-placebo-controlled-clinical-trial
#11
Parichehr Vahabi Anaraki, Ashraf Aminorroaya, Massoud Amini, Fatemeh Momeni, Awat Feizi, Bijan Iraj, Azamosadat Tabatabaei
BACKGROUND: The link between autoimmune thyroid diseases and Vitamin D deficiency has been reported. However, there are controversies in this regard. We conducted a double-blind randomized placebo-controlled clinical trial to investigate the effect of Vitamin D deficiency treatment on thyroid function and autoimmunity marker (thyroid peroxidase antibody [TPO-Ab]) in patients with Hashimoto's thyroiditis. MATERIALS AND METHODS: Fifty-six patients with Hashimoto's thyroiditis and Vitamin D deficiency (25-hydroxyvitamin D level ≤20 ng/mL) were randomly allocated into two groups to receive Vitamin D (50000 IU/week, orally) or placebo for 12 weeks, as Vitamin D-treated (n = 30) and control (n = 26) groups, respectively...
2017: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/29026270/longitudinal-study-on-the-effectiveness-of-vitamin-d-supplements-in-exclusively-breast-fed-infants
#12
Shintaro Terashita, Taichi Nakamura, Noboru Igarashi
Vitamin D deficiency is a common health problem in infancy. Breast-fed infants are at a higher risk of rickets than formula-fed infants. We observed fluctuations in vitamin D levels in infancy (phase I, 2009-2010) and considered the benefits of vitamin D supplementation specifically in exclusively breast-fed infants in Japan (phase II, 2015). Infants born at our hospital were enrolled in this study. In phase I, we measured 25-hydroxyvitamin D [25(OH)D] levels at 1- to 6-mo intervals from birth. In phase II, we measured 25(OH)D levels before and after supplementation...
2017: Clinical Pediatric Endocrinology: Case Reports and Clinical Investigations: Official Journal of the Japanese Society for Pediatric Endocrinology
https://www.readbyqxmd.com/read/29021995/tumor-induced-osteomalacia
#13
Pablo Florenzano, Rachel I Gafni, Michael T Collins
Tumor-induced osteomalacia (TIO) is a rare paraneoplastic syndrome clinically characterized by bone pain, fractures and muscle weakness. It is caused by tumoral overproduction of fibroblast growth factor 23 (FGF23) that acts primarily at the proximal renal tubule, decreasing phosphate reabsorption and 1α-hydroxylation of 25 hydroxyvitamin D, thus producing hypophosphatemia and osteomalacia. Lesions are typically small, benign mesenchymal tumors that may be found in bone or soft tissue, anywhere in the body...
December 2017: Bone Reports
https://www.readbyqxmd.com/read/29021285/placental-vitamin-d-metabolism-and-its-associations-with-circulating-vitamin-d-metabolites-in-pregnant-women
#14
Heyjun Park, Madeleine R Wood, Olga V Malysheva, Sara Jones, Saurabh Mehta, Patsy M Brannon, Marie A Caudill
Background: Little is known about placental vitamin D metabolism and its impact on maternal circulating vitamin D concentrations in humans.Objective: This study sought to advance the current understanding of placental vitamin D metabolism and its role in modulating maternal circulating vitamin D metabolites during pregnancy.Design: Nested within a feeding study, 24 healthy pregnant women (26-29 wk of gestation) consumed a single amount of vitamin D (511 IU/d from diet and a cholecalciferol supplement) for 10 wk...
October 11, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29020155/measurement-of-vitamin-d-for-epidemiologic-and-clinical-research-shining-light-on-a-complex-decision
#15
Anne Marie Z Jukic, Andrew N Hoofnagle, Pamela L Lutsey
Vitamin D is a fat-soluble vitamin that is synthesized in the skin with exposure to sunlight, or ingested from dietary supplements or food. There has been a dramatic increase in research on vitamin D, linking it with health outcomes as varied as reproductive function, infection, cardiovascular disease, and cancer. Vitamin D has generated much excitement, in part because it is an ideal intervention: low levels may be common and can be remedied with widely-available supplements. Determination of vitamin D status is complex, and has advanced dramatically in the past five years...
August 17, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29017892/muscle-functions-and-bone-strength-are-impaired-in-adolescents-with-type-1-diabetes
#16
Klara Maratova, Ondrej Soucek, Jana Matyskova, Zdenek Hlavka, Lenka Petruzelkova, Barbora Obermannova, Stepanka Pruhova, Stanislava Kolouskova, Zdenek Sumnik
BACKGROUND: Sarcopenia and osteoporosis are among the late complications of type 1 diabetes (T1D) in adults. Whether and to what extent musculoskeletal impairment is present in childhood and adolescence has yet to be determined. The aim of this study was to assess volumetric bone mineral density (BMD) and dynamic muscle function in adolescents with T1D and to assess the clinical and biochemical predictors of their musculoskeletal system. METHODS: Ninety-five children and adolescents (59 boys and 36 girls, mean age 16...
October 7, 2017: Bone
https://www.readbyqxmd.com/read/29017462/vitamin-d-deficiency-was-common-among-nursing-home-residents-and-associated-with-dementia-a-cross-sectional-study-of-545-swedish-nursing-home-residents
#17
Rebeka Arnljots, Jörgen Thorn, Marie Elm, Michael Moore, Pär-Daniel Sundvall
BACKGROUND: Residents of nursing homes may have low 25-hydroxyvitamin D (25OHD) concentrations. Associations between vitamin D and cognitive performance, dementia and susceptibility to infections are not clearly established. The aim of this study was to investigate the prevalence of vitamin D deficiency and to identify associated factors among residents of nursing homes for elderly. METHODS: In this cross-sectional study blood samples for analysis of 25OHD were collected from all participating residents of Swedish nursing homes for the elderly from January to March 2012...
October 10, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/29016492/characterizing-the-functional-decline-of-older-women-with-incident-urinary-incontinence
#18
Candace Parker-Autry, Denise K Houston, Julia Rushing, Holly E Richter, Leslee Subak, Alka M Kanaya, Stephen B Kritchevsky
OBJECTIVE: To characterize change in physical performance and differential prevalence of low skeletal muscle mass and strength (sarcopenia) and lower 25-hydroxyvitamin D concentrations among older women who developed urinary incontinence (UI) symptoms. METHODS: This is a secondary analysis of the Health, Aging, and Body Composition Study. Urinary incontinence symptoms were assessed using validated questions. The Short Physical Performance Battery measured physical performance...
October 6, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28994661/vitamin-d-supplementation-decreases-immune-activation-and-exhaustion-in-hiv-1-infected-youth
#19
Allison Ross Eckard, Mary Ann O'Riordan, Julia C Rosebush, Seungeun Thera Lee, Jakob G Habib, Joshua H Ruff, Danielle Labbato, Julie E Daniels, Monika Uribe-Leitz, Vin Tangpricha, Ann Chahroudi, Grace A McComsey
BACKGROUND: Heightened immune activation and exhaustion drive HIV disease progression and co-morbidities. Vitamin D has pleiotropic immunomodulatory effects, but little is known about the effects of supplementation in HIV. Our study investigates changes in immune activation and exhaustion markers after 12 months of supplementation in virologically-suppressed HIV-infected youth with vitamin D insufficiency. METHODS: This is a randomized, active-control, double-blind trial investigating with 3 different vitamin D3 doses [18,000 (standard/active-control dose), 60,000 (moderate dose) and 120,000 IU/monthly (high dose)] in 8-26 year old HIV-infected youth on combination antiretroviral therapy with baseline serum 25-hydroxyvitamin D (25(OH)D) concentrations ≤30 ng/mL...
October 10, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28991684/vitamin-d-deficiency-is-associated-with-disability-and-disease-progression-in-multiple-sclerosis-patients-independently-of-oxidative-and-nitrosative-stress
#20
Sayonara R Oliveira, Andréa N C Simão, Daniela Frizon Alfieri, Tamires Flauzino, Ana Paula Kallaur, Leda Mezzaroba, Marcell Alysson B Lozovoy, Beatriz Sardinha Sabino, Katerine Panichi Zanin Ferreira, Wildea L C J Pereira, Damacio R Kaimen-Maciel, Isaias Dichi, Edna M V Reiche
The aim of this study was to assess vitamin D status in patients with multiple sclerosis (MS) and to evaluate whether it was associated with oxidative and nitrosative stress (O&NS) markers and disability. This study included 137 patients with MS and 218 healthy controls. The markers evaluated were serum levels of 25-hydroxyvitamin D, lipid hydroperoxides, advanced oxidation protein products (AOPP), nitric oxide metabolites (NOx), and total radical-trapping antioxidant parameter TRAP/UA. Patients with 25(OH)D<20ng/mL showed higher EDSS (p=0...
October 15, 2017: Journal of the Neurological Sciences
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