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Kevin D Cashman et al.
The Journal of nutrition, 144(7), 1050-1057 (2014-05-16)
Fundamental knowledge gaps in relation to the 3 epimer of 25-hydroxycholecalciferol [3-epi-25(OH)D₃] limit our understanding of its relevance for vitamin D nutrition and health. The aims of this study were to characterize the 3-epi-25(OH)D₃ concentrations in a nationally representative sample
A method for simultaneous determination of 25-hydroxyvitamin D2 and 25-hydroxyvitamin D3 in human plasma by using two steps of high-performance liquid chromatography
Okano T, et al.
J. Nutr. Sci. Vitaminol., 27(1), 43-54 (1981)
Maha Hoteit et al.
Metabolism: clinical and experimental, 63(7), 968-978 (2014-05-31)
The aim of the current study is to investigate the prevalence of hypovitaminosis D in Lebanese subjects, its robust predictors, evaluate the relationship between 25 hydroxy vitamin D [25(OH)D] and parathyroid hormone levels, and derive desirable vitamin D levels, based
Yoon Ji Kim et al.
Endocrine journal, 60(2), 179-184 (2012-10-16)
Vitamin D is an important regulator of bone health. Previous studies examining the association between vitamin D deficiency and osteoporotic fractures have reported conflicting results. The relationship between vitamin D status and risk of vertebral fractures in diabetic patients is
Jessy El Hayek et al.
The Journal of nutrition, 143(2), 154-160 (2012-12-21)
The 2007 to 2009 Canadian Health Measures Survey reported vitamin D status in a representative sample of Canadians (6-79 y); however, children <6 y were not assessed. Our objective was to measure vitamin D intake from food and supplements, sun
Stephen J Bruce et al.
Rapid communications in mass spectrometry : RCM, 27(1), 200-206 (2012-12-15)
The aim of the work was to develop and validate a method for the quantification of vitamin D metabolites in serum using ultra-high-pressure liquid chromatography coupled to mass spectrometry (LC/MS), and to validate a high-resolution mass spectrometry (LC/HRMS) approach against
Grant R Campbell et al.
PLoS pathogens, 8(11), e1003017-e1003017 (2012-11-21)
Toll-like receptors (TLR) are important in recognizing microbial pathogens and triggering host innate immune responses, including autophagy, and in the mediation of immune activation during human immunodeficiency virus type-1 (HIV) infection. We report here that TLR8 activation in human macrophages
Uttam Garg et al.
Journal of clinical laboratory analysis, 26(5), 349-357 (2012-09-25)
Vitamin D plays a vital role not only in bone health but also in pathophysiology of many other body functions. In recent years, there has been significant increase in testing of 25-hydroxyvitamin D (25-OH vitamin D), a marker of vitamin
Amin Salehpour et al.
Nutrition journal, 11, 78-78 (2012-09-25)
Vitamin D concentrations are linked to body composition indices, particularly body fat mass. Relationships between hypovitaminosis D and obesity, described by both BMI and waist circumference, have been mentioned. We have investigated the effect of a 12-week vitamin D3 supplementation
Livia Melo Villar et al.
World journal of gastroenterology, 19(35), 5917-5924 (2013-10-15)
To evaluate the association between 25-hydroxyvitamin D [25(OH)D] and sustained virological response (SVR) in hepatitis C virus (HCV) infected individuals. Relevant studies were identified by systematically searching MEDLINE databases up to March 2012 and abstracts of the European and American
Janna Nissen et al.
The American journal of clinical nutrition, 101(1), 218-227 (2014-12-21)
Little is known about how the genetic variation in vitamin D modulating genes influences ultraviolet (UV)B-induced 25-hydroxyvitamin D [25(OH)D] concentrations. In the Food with vitamin D (VitmaD) study, we showed that common genetic variants rs10741657 and rs10766197 in 25-hydroxylase (CYP2R1)
Kanitpong Phabphal et al.
Epilepsia, 54(2), 249-255 (2013-01-04)
This study sought to determine the association between BsmI polymorphism and bone mineral density, 25-hydroxyvitamin D, and parathyroid hormone levels in patients with epilepsy. We recruited ambulatory young adults with epilepsy who were taking phenytoin. Data regarding demographics, basic laboratory
Corinne D Engelman et al.
The Journal of nutrition, 143(1), 17-26 (2012-11-30)
Vitamin D deficiency {defined by the blood concentration of 25-hydroxyvitamin D [25(OH)D]} has been associated with many adverse health outcomes. Genetic and nongenetic factors account for variation in 25(OH)D, but the role of interactions between these factors is unknown. To
P Adamczyk et al.
Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et metabolisme, 47(12), 873-879 (2015-07-03)
Changes in body weight, waist and hip circumferences, body composition, and skeletal status in women after bariatric surgery were evaluated. Thirty-six women [mean age 41.2 ± (SD) 9.5 years, weight 115.7±18.0 kg, and BMI 42.1±5.3 kg/m(2)] underwent laparoscopic sleeve gastrectomy. Bone mineral density
Tarja Nurmi et al.
Analytical biochemistry, 435(1), 1-9 (2013-01-01)
The diode array detector in our high-performance liquid chromatography (HPLC) method for 25-hydroxyvitamin D(3) (25OHD(3)) and 25-hydroxyvitamin D(2) (25OHD(2)) did not perform satisfactorily for measuring human serum concentrations below 30nM. Because of a need for a reliable self-managed method in
Development and validation of an LC--MS/MS based method for quantification of 25 hydroxyvitamin D2 and 25 hydroxyvitamin D3 in human serum and plasma
Zhang SW, et al.
Journal of Chromatography. B, Biomedical Sciences and Applications, 961(1), 62-70 (2014)
Jatinderpal K Sandhu et al.
Biomedical chromatography : BMC, 28(6), 913-917 (2014-05-28)
The accurate and specific measurement of vitamin D is increasingly important for determining the role of vitamin D in the pathogenesis of disease. Liquid chromatography coupled to tandem mass spectrometry (LC/MS/MS) has increasingly become the analytical modality of choice for
Amit S Dande et al.
The Journal of clinical endocrinology and metabolism, 98(5), E872-E876 (2013-03-14)
The purpose of this study was to identify the prevalence and clinical consequences of vitamin D insufficiency in patients with takotsubo cardiomyopathy. Takotsubo cardiomyopathy is a syndrome of acute, transient left ventricular dysfunction seen predominantly in postmenopausal women after acute
Reply to T Weishaar.
Ramon A Durazo-Arvizu et al.
The American journal of clinical nutrition, 101(2), 413-414 (2015-02-04)
Maarten W Taal et al.
Kidney international, 86(2), 407-413 (2014-01-17)
Fibroblast growth factor (FGF) 23 is an important regulator of phosphaturia. Its serum level was found to increase before that of parathyroid hormone (PTH) in early chronic kidney disease (CKD) in some but not all previous studies. As vitamin D
Byung-Kook Lee et al.
Asia Pacific journal of clinical nutrition, 21(4), 536-546 (2012-09-29)
We present data from the Korean National Health and Nutritional Examination Survey (KNHANES) 2008-2009 on the association between 25-hydroxyvitamin D[25(OH)D] status and type 2 diabetes in a representative sample of the adult Korean population. This study was based on data
Anna-Maija Tolppanen et al.
Epidemiology (Cambridge, Mass.), 24(2), 310-319 (2013-02-05)
Higher serum total 25-hydroxyvitamin D (25(OH)D) concentrations have been associated with better lung function and lower risk of allergic disease. 25(OH)D3 constitutes the majority of total 25(OH)D and has been suggested to be more potent than 25(OH)D2. We studied the
Kevin D Cashman et al.
The British journal of nutrition, 112(2), 193-202 (2014-05-02)
It has been suggested that vitamin D₂ is not very prevalent in the human food chain. However, data from a number of recent intervention studies suggest that the majority of subjects had measurable serum 25-hydroxyvitamin D₂ (25(OH)D₂) concentrations. Serum 25(OH)D₂
The role of vitamin D in depression: from a curious idea to a therapeutic option.
Cédric Annweiler et al.
The Journal of clinical psychiatry, 74(11), 1121-1122 (2013-12-18)
M R Pinzone et al.
European review for medical and pharmacological sciences, 17(14), 1938-1950 (2013-07-24)
Vitamin D deficiency is very common among HIV-infected subjects. We cross-sectionally evaluated the prevalence and risk factors for hypovitaminosis D in 91 HIV-infected Italian patients. We studied in a cohort of 91 HIV-infected Italian patients the metabolism of Vitamin D
Fahim Abbasi et al.
The Journal of nutrition, 145(4), 714-719 (2015-03-06)
Individuals with prediabetes mellitus (PreDM) and low circulating 25-hydroxyvitamin D [25(OH)D] are at increased risk of type 2 diabetes mellitus (T2DM). We aimed to determine whether low 25(OH)D concentrations are associated with defects in insulin action and insulin secretion in
Zengliu Su et al.
Clinica chimica acta; international journal of clinical chemistry, 417, 62-66 (2012-12-26)
The circulating form of vitamin D, 25-Hydroxyvitamin D (25-OHD), is commonly measured in clinical labs to evaluate vitamin D status of an individual. Vitamin D exists in 2 major forms: vitamin D3 and D2. Current methodologies for 25-OHD testing include
Sina Gallo et al.
The Journal of nutrition, 143(2), 148-153 (2012-12-21)
The biological equivalency of ergocalciferol (D2) and cholecalciferol (D3) has been debated; several comparisons have appeared in the adult literature but are scarce in pediatrics. The objective of this study was to compare increases in plasma 25-hydroxyvitamin D [25(OH)D] concentrations
Eun Young Choi
Asia Pacific journal of clinical nutrition, 21(4), 526-535 (2012-09-29)
Vitamin D deficiency is a global health problem that is associated with increased risks of major diseases. This study investigated the status of 25-hydroxyvitamin D [25(OH)D] and its demographic and lifestyle determinants among Korean adults. A total of 5,847 adults
J Dayre McNally et al.
The Journal of clinical endocrinology and metabolism, 98(5), E877-E881 (2013-04-03)
Recent studies in critically ill populations have suggested both adrenal insufficiency (AI) and vitamin D deficiency to be associated with worse clinical outcome. There are multiple mechanisms through which these pleiotropic hormones might synergistically influence critical illness. The aim of
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