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Florian Meier et al.
Rapid communications in mass spectrometry : RCM, 28(22), 2461-2470 (2014-10-11)
Unsaturated lipids play a crucial role in cellular processes as signaling factors, membrane building blocks or energy storage molecules. However, adequate mass spectrometry imaging of this diverse group of molecules remains challenging. In this study we implemented silver cationization for...
Kazuya Omi et al.
Clinical chemistry, 61(4), 627-635 (2015-02-20)
Small molecules classified as haptens are generally measured by competitive immunoassay, which is theoretically inferior to noncompetitive sandwich immunoassay in terms of sensitivity and specificity. We created a method for developing sandwich immunoassays to measure haptens on the basis of...
Michelle L McCully et al.
Journal of immunology (Baltimore, Md. : 1950), 195(1), 96-104 (2015-05-24)
The localization of memory T cells to human skin is essential for long-term immune surveillance and the maintenance of barrier integrity. The expression of CCR8 during naive T cell activation is controlled by skin-specific factors derived from epidermal keratinocytes and...
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...
About 25-dihydroxycholecalciferol.
Ozsoylu S.
European Journal of Pediatrics, 170 (2011)
Kristyna Brabnikova-Maresova et al.
Arthritis research & therapy, 16(5), 460-460 (2014-10-05)
Juvenile idiopathic arthritis (JIA) is a disease associated with loss of bone mass, deterioration in bone mass quality and an increased risk of fractures. The objective of this study was to evaluate factors that predict bone mineral density (BMD) alterations...
Upasana Banerjee et al.
Bioorganic & medicinal chemistry letters, 22(3), 1330-1334 (2012-01-10)
A structure-activity relationship study focusing on the A-ring of vitamin D3 (VD3) was undertaken to elucidate its role in inhibiting the Hedgehog pathway and in mediating anti-cancer effects. Analogues resulting from simple functional group substitution at 3' position of VD3...
J M Wierzbicka et al.
International journal of oncology, 47(3), 1084-1096 (2015-08-12)
Colorectal cancer (CRC) is an emerging global problem with the rapid increase in its incidence being associated with an unhealthy lifestyle. Epidemiological studies have shown that decreased levels of vitamin D3 significantly increases the risk of CRC. Furthermore, negative effects...
Dae-Jung Kang et al.
Biotechnology letters, 37(9), 1895-1904 (2015-05-23)
Resting cells of Pseudonocardia sp. KCTC 1029BP were used for the bioconversion of vitamin D3 to calcifediol which is widely used to treat osteomalacia and is industrially produced by chemical synthesis. To obtain the maximum bioconversion yield of calcifediol by...
Kurt D Pennell et al.
Steroids, 95, 24-31 (2014-12-30)
Analytical techniques used to quantify neurosteroids in biological samples are often compromised by non-specificity and limited dynamic range which can result in erroneous results. A relatively rapid and inexpensive gas chromatography-mass spectrometry (GC-MS) was developed to simultaneously measure nine neurosteroids...
Carly M Kemmis et al.
The Journal of nutrition, 136(4), 887-892 (2006-03-22)
1alpha,25-dihydroxycholecalciferol [1alpha,25(OH)2D3], the active form of cholecalciferol, is a negative growth regulator of breast cancer cells. CYP27B1 is a cytochrome P450-containing hydroxylase expressed in kidney and other tissues that generates 1alpha,25(OH)2D3 from an inactive vitamin D precursor 25-hydroxycholecalciferol [25(OH)D3]. In...
Stuart M Sprague et al.
American journal of nephrology, 40(6), 535-545 (2015-01-13)
Vitamin D insufficiency drives secondary hyperparathyroidism (SHPT) and is associated with increased cardiovascular mortality in patients with chronic kidney disease (CKD). SHPT is poorly addressed by current vitamin D repletion options. The present study evaluated a novel investigational vitamin D...
Ting-I Lee et al.
International journal of cardiology, 176(1), 151-157 (2014-07-27)
High free fatty acid with reduced glucose utilization in diabetes mellitus (DM) impairs cardiac function. Peroxisome proliferator-activated receptors (PPARs) modulate myocardial lipid and glucose homeostasis. The active 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) regulates oxidative stress and inflammation, which may play a key...
A Rodriguez et al.
BJOG : an international journal of obstetrics and gynaecology, 122(12), 1695-1704 (2014-09-12)
To investigate the association of maternal circulating 25-hydroxyvitamin D3 [25(OH)D3] concentration with pregnancy and birth outcomes. Prospective cohort study. Four geographical areas of Spain, 2003-2008. Of 2382 mother-child pairs participating in the INfancia y Medio Ambiente (INMA) Project. Maternal circulating...
Sevil Bilir Goksugur et al.
Allergologia et immunopathologia, 43(6), 533-537 (2015-03-23)
Although solid cohort studies confirmed a preventative role for the anti-oxidant vitamin D in allergic asthma, a limited number of studies focused on allergic rhinoconjunctivitis (ARC). Here, we aimed to determine 25-hydroxycholecalciferol levels in tear and serum in young allergic...
Cécile Meunier et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 989, 54-61 (2015-03-25)
Many methods for routine total plasma/serum 25-hydroxyvitamin D (25OHD) measurements are available from automated immunoassays to the most specific LC-MS/MS techniques. These last ones are nowadays numerous, still perfectible but more powerful than immunoassays in specific illnesses. We presented a...
Peter Daley et al.
The Lancet. Infectious diseases, 15(5), 528-534 (2015-04-13)
Vitamin D has immunomodulatory effects that might aid clearance of mycobacterial infection. We aimed to assess whether vitamin D supplementation would reduce time to sputum culture conversion in patients with active tuberculosis. We did this randomised, double-blind, placebo-controlled, superiority trial...
Lorraine Frew et al.
PloS one, 9(8), e103434-e103434 (2014-08-05)
hCAP18/LL-37 is the sole human cathelicidin; a family of host defence peptides with key roles in innate host defence. hCAP18/LL-37 is expressed primarily by neutrophils and epithelial cells, but its production and function in the lower genital tract is largely...
Jiang Jiang et al.
Pharmaceutical research, 32(9), 2851-2862 (2015-03-17)
This study seeks to develop fiber membranes for local sustained delivery of 25-hydroxyvitamin D3 to induce the expression and secretion of LL-37 at or near the surgical site, which provides a novel therapeutic approach to minimize the risk of infections....
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...
Alberto Lo Gullo et al.
PloS one, 10(8), e0134602-e0134602 (2015-08-05)
Suboptimal vitamin D status was recently acknowledged as an independent predictor of cardiovascular diseases and all-cause mortality in several clinical settings, and its serum levels are commonly reduced in Rheumatoid Arthritis (RA). Patients affected by RA present accelerated atherosclerosis and...
Manish D Sinha et al.
Pediatric nephrology (Berlin, Germany), 30(10), 1843-1852 (2015-05-16)
The aim of this study was to evaluate the association of serum intact fibroblast growth factor 23 (FGF23) concentrations with indexed left ventricular mass in children with non-dialysis stages 3-5 of chronic kidney disease (CKD). The study cohort comprised 83...
H F DeLuca
Biochemical Society transactions, 10(3), 147-158 (1982-06-01)
Cholecalciferol must be regarded as a pro-hormone rather than a vitamin, since it is normally produced in skin under the influence of ultraviolet light. Cholecalciferol must be metabolized in liver to 25-hydroxycholecalciferol and subsequently to 1,25-dihydroxycholecalciferol before it can act...
Marina V Antunes et al.
Therapeutic drug monitoring, 37(6), 733-744 (2015-04-09)
In view of the large variability on therapeutic response and the multiple factors associated to tamoxifen (TAM) metabolic activation, this study aimed to evaluate the effect of CYP2D6 and CYP3A4 phenotypes, drug interactions, and vitamin D exposure on TAM metabolism...
Johanna Breuer et al.
Annals of neurology, 75(5), 739-758 (2014-04-29)
Environmental conditions (eg, latitude) play a critical role in the susceptibility and severity of many autoimmune disorders, including multiple sclerosis (MS). Here, we investigated the mechanisms underlying the beneficial effects of immune regulatory processes induced in the skin by moderate...
Linda Ahonen et al.
Journal of chromatography. A, 1364, 214-222 (2014-09-11)
We have developed an ultra-high-performance liquid chromatography-atmospheric pressure photoionization-tandem mass spectrometric (UHPLC-APPI-MS/MS) method for the simultaneous quantitative analyses of several oxysterols and vitamin D metabolites in mouse brain and cell line samples. An UHPLC-APPI-high resolution mass spectrometric (UHPLC-APPI-HRMS) method that...
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...
Ghaith Bakdash et al.
Vaccine, 32(47), 6294-6302 (2014-09-23)
Vitamin D is recognized as a potent immunosuppressive drug. The suppressive effects of vitamin D are attributed to its physiologically active metabolite 1,25 dihydroxy vitamin D3 (calcitriol), which was shown, to prime dendritic cells (DCs) to promote the development of...
Fadia S AlBuhairan et al.
The Journal of adolescent health : official publication of the Society for Adolescent Medicine, 57(3), 263-269 (2015-08-25)
With the increasing burden of noncommunicable disease, adolescence is viewed as an opportune time to prevent the onset of certain behaviors and promote healthy states. Although adolescents comprise a considerable portion of Saudi Arabia's population, they have received insufficient attention...
Joseph Schwager et al.
Molecular nutrition & food research, 59(8), 1513-1523 (2015-03-27)
The impact of L-ascorbic acid (L-AA) on the chemokinesis (CK) and chemotaxis (CT) of HL-60 cells and polymorphonuclear cells (PMN) was investigated. HL-60 cells were differentiated with DMSO, retinoic acid (RA), vitamin D, or L-AA. Chemokinesis and chemotaxis of differentiated...