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25-hydroxyvitamin D

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https://www.readbyqxmd.com/read/29679754/serum-25-hydroxyvitamin-d-and-breast-cancer-risk-by-pathological-subtype-mcc-spain
#1
Virginia Lope, Adela Castelló, Antonio Mena-Bravo, Pilar Amiano, Nuria Aragonés, Tania Fernández-Villa, Marcela Guevara, Trinidad Dierssen-Sotos, Guillermo Fernandez-Tardón, Gemma Castaño-Vinyals, Rafael Marcos-Gragera, Víctor Moreno, Dolores Salas-Trejo, Marian Diaz-Santos, Madalen Oribe, Isabel Romieu, Manolis Kogevinas, Feliciano Priego-Capote, Beatriz Pérez-Gómez, Marina Pollán
Epidemiologic evidence on the association between vitamin D and breast cancer is still inconclusive. This study analyzes the association between serum 25-hydroxyvitamin D (25(OH)D) and breast cancer risk by pathologic subtype, stage at diagnosis and specific breast cancer risk factors. We conducted a population-based multicase-control study where 546 histologically-confirmed breast cancer cases and 558 population controls, frequently matched by geographic area, age and body mass index, were recruited in 12 Spanish provinces (MCC-Spain)...
April 18, 2018: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29678847/diagnostic-value-of-vitamin-d-status-and-bone-turnover-markers-in-rheumatoid-arthritis-complicated-by-osteoporosis
#2
Li-Ming Tan, Ting-Ting Long, Xiao-Lin Guan, Si-Fan Wu, Wei Zheng, Hui-Ying Fu, Qiao-Hua Wang, Yi-Mei Meng, Yang Wu, Ting-Ting Zeng, Yong-Jian Tian, Jian-Lin Yu, Juan-Juan Chen, Hua Li, Li-Ping Cao
OBJECTIVE: To research the diagnostic performance of clinical potential bone turnover indexes in rheumatoid arthritis (RA) complicated with osteoporosis (OP). METHODS: This study involved 87 RA patients, 48 with OP, and 39 without OP, and 204 non-RA control patients, including those with systemic lupus erythematosus, ankylosing spondylitis, primary Sjogren's syndrome, systemic sclerosis, and healthy patients. The levels of 25-hydroxyvitamin D [25(OH)D], β-crosslaps (β-CROSSL), parathyroid hormone (PTH) were measured by electrochemiluminescence (ECLIA), and the level of bone alkaline phosphatase (BALP) was measured by lectin affinity method...
March 2018: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/29678393/positive-correlations-between-free-vitamin-d-and-bone-variables-in-a-group-of-young-lebanese-women
#3
Abir Alwan, Maroun Rizkallah, Ghassan Maalouf, Joseph Matta, Fabienne Frenn, Angélique Barakat, Falah Bachour, Amer Sebaaly, Abdel-Jalil Berro, Nathalie Al Rassy, Mirza Howayek, Hassane Zouhal, Rawad El Hage
Optimizing bone mass in adulthood is of great importance to prevent the occurrence of osteoporosis in later age. Vitamin D is an essential component of bone health. Low-serum vitamin D is associated with low bone mineral density (BMD), which is an important predictor of fracture risk. However, most cells, apart from renal tubular cells, are exposed to free rather than to total 25-hydroxyvitamin D. Whether free vitamin D would be a better marker than total vitamin D is still under debate. The aim of the present study was to explore the relationships between serum total vitamin D, vitamin D-binding protein (BP), free vitamin D, and bone parameters in a group of young Lebanese women...
March 26, 2018: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/29674238/calcium-metabolism-serum-markers-in-adult-patients-with-epilepsy-and-the-effect-of-vitamin-d-supplementation-on-seizure-control
#4
Mario Tombini, Andrea Palermo, Giovanni Assenza, Giovanni Pellegrino, Antonella Benvenga, Chiara Campana, Anda Mihaela Naciu, Federica Assenza, Vincenzo Di Lazzaro
PURPOSE: To evaluate serum markers of calcium metabolism in adult patients with epilepsy (PWE) treated with antiepileptic drugs (AEDs) and the effect of vitamin D supplementation on seizure frequency. METHODS: Serum levels of calcium, phosphate, intact parathyroid hormone (iPTH) and 25-hydroxyvitamin D (25[OH]D) were compared in 160 PWE on chronic therapy with AEDs and 42 matched controls. Blood concentrations were analyzed taking into account the different features of epilepsy and treatment...
April 11, 2018: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29673831/association-of-hypovitaminosis-d-with-triceps-brachii-muscle-fatigability-among-older-women-findings-from-the-epidos-cohort
#5
G Duval, Y Rolland, A M Schott, H Blain, P Dargent-Molina, S Walrand, G Duque, C Annweiler
BACKGROUND: Vitamin D affects physical performance in older adults. Its effects on muscles, notably on muscle strength, remain unclear. The objective of this cross-sectional study was to determine whether hypovitaminosis D is associated with triceps brachii muscle fatigability in community-dwelling older women. METHODS: A randomized subset of 744 women aged ≥75years from the EPIDOS cohort was categorized into two groups according to triceps brachii muscle fatigability, defined as loss of strength >5% between two consecutive maximal isometric voluntary contractions...
May 2018: Maturitas
https://www.readbyqxmd.com/read/29673407/hypercalcemia-as-a-rare-presentation-of-angioimmunoblastic-t-cell-lymphoma-a-case-report
#6
Sana Chams, Inaya Hajj Hussein, Skye El Sayegh, Nour Chams, Khalid Zakaria
BACKGROUND: Angioimmunoblastic T cell lymphoma is a rare malignancy, accounting for only 2% of all non-Hodgkin lymphomas, first described in the 1970s and subsequently accepted as a distinct entity in the current World Health Organization classification. Due to the paucity of this disease, there is still no identifiable etiology, no consistent risk factors, and the pathogenesis remains unclear. CASE PRESENTATION: An 83-year-old Caucasian man presented to an emergency department with palpitations and was found to have atrial fibrillation...
April 20, 2018: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29672719/title-hormonal-contraceptive-use-is-associated-with-higher-total-but-unaltered-free-25-hydroxyvitamin-d-serum-concentrations
#7
Stefan Pilz, Rima Obeid, Verena Schwetz, Christian Trummer, Marlene Pandis, Elisabeth Lerchbaum, Thomas R Pieber, Barbara Obermayer-Pietsch, Manfred Wilhelm, Andreas Hahn, Christiane Schön
Context: Hormonal contraceptive (HC) intake is associated with higher total 25-hydroxyvitamin D (25[OH]D) concentrations but the effect of HC on free 25(OH)D is unclear. Objective: We investigated whether free 25(OH)D concentrations differ according to use of HC. Design: This is a post-hoc analysis of a randomized open trial. Setting: This study was conducted from 13th January to 9th May 2016 at a clinical research organization in Esslingen, Germany...
April 16, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29672520/plasma-25-hydroxyvitamin-d-concentration-and-risk-of-type-2-diabetes-and-pre-diabetes-12-year-cohort-study
#8
Sue K Park, Cedric F Garland, Edward D Gorham, Luke BuDoff, Elizabeth Barrett-Connor
BACKGROUND: It has been reported that higher plasma 25-hydroxyvitamin D is associated with lower risk of type 2 diabetes. However the results to date have been mixed and no adequate data based on a cohort are available for the high end of the normal range, above approximately 32 ng/ml or 80 nmol/L. METHODS: We performed a cohort study of 903 adults who were known to be free of diabetes or pre-diabetes during a 1997-1999 visit to a NIH Lipid Research Centers clinic...
2018: PloS One
https://www.readbyqxmd.com/read/29672176/prevalence-and-risk-factors-for-vascular-calcification-in-chinese-patients-receiving-dialysis-baseline-results-from-a-prospective-cohort-study
#9
Zhi-Hong Liu, Xue-Qing Yu, Jun-Wei Yang, Ai-Li Jiang, Bi-Cheng Liu, Chang-Ying Xing, Ji-Zhuang Lou, Mei Wang, Hong Cheng, Jun Liu, Jun-Zhou Fu, Ai-Hua Zhang, Miao Zhang, Qiao-Ling Zhou, Chen Yu, Rong Wang, Li Wang, Yu-Qing Chen, Tian-Jun Guan, Ai Peng, Chen Nan, Chuan-Ming Hao, Xu-Yang Cheng
OBJECTIVE: With limited data available on calcification prevalence in chronic kidney disease (CKD) patients on dialysis, the China Dialysis Calcification Study (CDCS) determined the prevalence of vascular/valvular calcification (VC) and association of risk factors in Chinese patients with prevalent hemodialysis (HD) or peritoneal dialysis (PD). METHODS: CKD patients undergoing HD/PD for ≥6 months were enrolled. Prevalence data for calcification and medical history were documented at baseline...
April 19, 2018: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/29671819/dose-response-relationship-between-serum-retinol-levels-and-survival-in-patients-with-colorectal-cancer-results-from-the-dachs-study
#10
Haifa Maalmi, Viola Walter, Lina Jansen, Robert W Owen, Alexis Ulrich, Ben Schöttker, Jenny Chang-Claude, Michael Hoffmeister, Hermann Brenner
Current knowledge on the role of retinol in the prognosis of patients with colorectal cancer (CRC) is very limited. We investigated the association of serum retinol levels with survival outcomes in a large cohort of 2908 CRC patients from Germany. Retinol concentrations were determined in serum collected shortly after diagnosis by mass spectrometry. Associations between serum retinol levels and survival outcomes were assessed using multivariable Cox regression and dose-response analyses. The joint association of serum retinol and serum 25-hydroxyvitamin D₃ (25(OH)D₃) with survival outcomes was also examined...
April 19, 2018: Nutrients
https://www.readbyqxmd.com/read/29671532/vitamin-d-screening-and-supplementation-in-community-dwelling-adults-common-questions-and-answers
#11
Michael L LeFevre, Nicholas M LeFevre
Measurement of vitamin D levels and supplementation with oral vitamin D have become commonplace, although clinical trials have not demonstrated health benefits. The usefulness of serum 25-hydroxyvitamin D levels to assess adequate exposure to vitamin D is hampered by variations in measurement technique and precision. Serum levels less than 12 ng per mL reflect inadequate vitamin D intake for bone health. Levels greater than 20 ng per mL are adequate for 97.5% of the population. Routine vitamin D supplementation does not prolong life, decrease the incidence of cancer or cardiovascular disease, or decrease fracture rates...
February 15, 2018: American Family Physician
https://www.readbyqxmd.com/read/29670260/familial-clustering-of-vitamin-d-deficiency-via-shared-environment-the-korean-national-health-and-nutrition-examination-survey-2008-2012
#12
Namki Hong, Young Ki Lee, Yumie Rhee
BACKGROUND/OBJECTIVES: Familial correlation of serum 25-hydroxyvitamin D concentration (25(OH)D) was reported in twin- or parent-offspring studies. However, data on relative contribution of environmental factors on familial clustering of 25(OH)D in extended families are limited. SUBJECTS/METHODS: We performed cross-sectional study using data from the Korean National Health and Nutrition Examination Survey (KNHANES) 2008-2012. Familial correlations of 25(OH)D were estimated in 28,551 subjects from 10,882 families...
April 18, 2018: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29670182/association-of-maternal-serum-25-hydroxyvitamin-d-concentrations-in-second-and-third-trimester-with-risk-of-macrosomia
#13
Juan Wen, Congli Kang, Jiaan Wang, Xianwei Cui, Qin Hong, Xingyun Wang, Lijun Zhu, Pengfei Xu, Ziyi Fu, Lianghui You, Xing Wang, Chenbo Ji, Xirong Guo
Whether the maternal vitamin D deficiency is associated with infant birth weight is still an argument. Here, we performed a nested case-control study (545 women who subsequently delivered infant with macrosomia and 1090 controls) to evaluate the association of the maternal serum 25-hydroxyvitamin D [25(OH)D] concentrations with risk of macrosomia. We measured the serum 25(OH)D concentrations by enzyme immunoassays. Logistic regression analysis, receiver-operator characteristic curve analysis and graphical nomogram were used for the statistical analyses...
April 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29666919/prevalence-of-vitamin-d-insufficiency-and-evidence-for-disease-prevention-in-the-older-population
#14
REVIEW
Julia Kühn, Paula Trotz, Gabriele I Stangl
The prevalence of vitamin D insufficiency, usually assessed by the analysis of circulating 25-hydroxyvitamin D (25[OH])D), is very high in the aging German population. An important factor that reduces endogenous vitamin D synthesis in older persons is physical inactivity or care-dependency that limits the time spent outside. Additionally, it has been suggested that the age-dependent decline in the glomerular filtration rate is associated with a reduced production of bioactive calcitriol. As this phenomenon is not detectable by the assessment of 25(OH)D, it is necessary to analyze the level of parathyroid hormone as a marker of calcitriol function...
April 17, 2018: Zeitschrift Für Gerontologie und Geriatrie
https://www.readbyqxmd.com/read/29666170/serum-25-hydroxyvitamin-d-levels-throughout-pregnancy-a-longitudinal-study-in-healthy-and-preeclamptic-pregnant-women
#15
Yessica Agudelo-Zapata, Luis Miguel Maldonado-Acosta, Hector Fabio Sandoval-Alzate, Natalia Elvira Poveda, María Fernanda Garcés, Jonathan Alexander Cortés-Vásquez, Andrés Felipe Linares-Vaca, Carlos Alejandro Mancera-Rodríguez, Shahar Alexandra Perea-Ariza, Karen Yuliana Ramírez-Iriarte, Camilo Andrés Castro-Saldarriaga, Juan Manuel Arteaga-Diaz, Roberto Franco-Vega, Edith Angel-Muller, Arturo José Parada-Baños, Jorge Eduardo Caminos
BACKGROUND: Worldwide there is a high prevalence of 25-hydroxyvitamin D (25OHD) deficiency, and has been associated with adverse outcomes during pregnancy. OBJECTIVE: This is a nested, case-control study in a longitudinal cohort to compare the serum 25OHD levels and other biomarkers throughout pregnancy in a group of 20 preeclamptic women and 61 healthy pregnant women. An additional group of 29 healthy non-pregnant women were also studied during the two phases of the menstrual cycle...
April 17, 2018: Endocrine Connections
https://www.readbyqxmd.com/read/29665087/25-hydroxyvitamin-d-threshold-for-the-effects-of-vitamin-d-supplements-on-bone-density-secondary-analysis-of-a-randomized-controlled-trial
#16
Helen M Macdonald, Ian R Reid, Gregory D Gamble, William D Fraser, Jonathan C Tang, Adrian D Wood
Most trials of vitamin D supplementation have shown no benefits on bone density (BMD), though severe vitamin D deficiency causes osteomalacia which is associated with profound BMD deficits. Recently, the ViDA-BMD study from New Zealand demonstrated a threshold of baseline 25-hydroxyvitamin D (30 nmol/L) below which vitamin D supplementation did benefit BMD. We have now re-examined data from a similar trial in Aberdeen to determine whether a baseline 25-hydroxyvitamin D threshold of 30 nmol/L is also observed in that database...
April 17, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29662333/the-prevalence-of-hypovitaminosis-d-and-its-associated-risk-factors-among-women-of-reproductive-age-in-saudi-arabia-a-systematic-review-and-meta-analysis
#17
REVIEW
Riyadh A Alzaheb
Vitamin D deficiency is currently a worldwide epidemic. Middle Eastern countries, including Saudi Arabia, have high vitamin D deficiency prevalence, most prominently among women, despite their plentiful year-round sunshine. Previous research investigating vitamin D status among Saudi women of reproductive age (15-49 years) is scarce, and no study has used a nationally representative sample, so this review quantified overall hypovitaminosis D prevalence among women in Saudi Arabia and explored the associated risk factors...
2018: Clinical Medicine Insights. Women's Health
https://www.readbyqxmd.com/read/29661746/effects-of-oral-vitamin-d-3-supplementation-in-stage-3-chronic-kidney-disease-subjects-insulin-resistance-syndrome-and-hormonal-disturb-interactions
#18
Amina Tahar, Faiza Zerdoumi, Messaoud Saidani, Lakhdar Griene, Elhadj-Ahmed Koceir
The 1-25-hydroxyvitamine D (1-25OHD) or calcitriol deficiency in chronic kidney disease (CKD) patients was associated with increases vascular calcification risk, nephrons reduction, bone deficit and cardiovascular mortality by atherosclerosis. The objective of this study was to investigate the pleiotropic effects of 200.000 IU (D200 group) every 3 months versus 30.000 IU (D30 group) every month dose vitamin D supplementation in stage 3 CKD patients. A cohort of 132 adult subjects was randomized into 2 groups according to dose vitamin D supplementation in deficient subjects (25OHD <50 nmol/L or <20 ng/mL)...
April 16, 2018: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/29658832/the-associations-between-hypovitaminosis-d-higher-pth-levels-with-bone-mineral-densities-and-risk-of-the-10-year-probability-of-major-osteoporotic-fractures-in-chinese-patients-with-t2dm
#19
Xiao-Feng Wang, Jing-Jia Yu, Xiao-Jing Wang, Yi-Xuan Jing, Li-Hao Sun, Bei Tao, Wei-Qing Wang, Guang Ning, Jian-Min Liu, Hong-Yan Zhao
OBJECTIVE: In the current study, we investigated the vitamin D status, and its relationships with parathyroid hormone (PTH) levels, bone mineral density (BMD), and the 10-year probability of fractures in Chinese patients with type 2 diabetes mellitus (T2DM). METHODS: This was a cross-sectional study of 785 patients. BMDs at the lumbar spine (L2-4), femoral neck (FN), and total hip (TH) were measured by dual-energy X-ray absorptiometry (DXA). Serum levels of 25-hydroxyvitamin D (25(OH)D) and intact PTH were also quantified...
April 2018: Endocrine Practice
https://www.readbyqxmd.com/read/29657024/vitamin-d-and-trabecular-bone-score-in-a-group-of-young-lebanese-adults
#20
Abir Alwan, Nathalie Al Rassy, Abdel-Jalil Berro, Maroun Rizkallah, Joseph Matta, Fabienne Frenn, Falah Bachour, Amer Sebaaly, Ghassan Maalouf, Hassane Zouhal, Rawad El Hage
The relationship between vitamin D and trabecular bone score (TBS) in young adults remains unclear. The aim of this study was to explore the relationship between 25-hydroxyvitamin D [25(OH)D] serum levels and TBS in a healthy adult population. A total of 54 men and 61 women whose ages range from 18 to 35 participated in the present study. Participants with 25(OH)D insufficiency (between 21 and 29 ng/mL) were 55.7%, and those with 25(OH)D deficiency (≤20 ng/mL) were 11.4%. TBS positively correlated with 25(OH)D in men (r = 0...
March 23, 2018: Journal of Clinical Densitometry
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