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Vitamin deficiencies

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https://www.readbyqxmd.com/read/29054021/qprtase-modified-n-doped-carbon-quantum-dots-a-fluorescent-bioprobe-for-selective-detection-of-neurotoxin-quinolinic-acid-in-human-serum
#1
Ranjana Singh, Sunayana Kashayap, Vimal Singh, Arvind M Kayastha, Hirdyesh Mishra, Preeti Suman Saxena, Anchal Srivastava, Ranjan K Singh
Highly fluorescent nitrogen doped carbon quantum dots (NCQDs) were synthesized using microwave assisted green method. It was characterized by Transmission Electron Microscopy (TEM), FTIR, UV-Visible absorption and Photoluminiscence (PL) techniques. The NCQDs were immobilized with an enzyme named quinolinate phoshphoribosyl transferase (QPRTase). The NCQDs immobilized by QPRTase was used as a fluorescent bioprobe for the selective detection of endogenous neurotoxin quinolinic acid (QA) whose elevated level in serum is marker of many neurological disorders such as Alzheimer's, Huntington's and HIV associated dementia (HAD) as well as deficiency of vitamin B6...
October 10, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29053488/causes-of-childhood-vision-impairment-in-the-school-for-the-blind-in-eritrea
#2
Rajendra Gyawali, Vanessa R Moodley
SIGNIFICANCE: Our study provides the much-needed evidence on causes of childhood blindness in Eritrea. This will assist authorities to plan appropriate strategies and implement preventive, curative, and rehabilitative services to address these causes of vision loss in children in this resource-limited country. PURPOSE: This study aims to identify the causes of severe vision impairment and blindness in children attending the only school for the blind in Eritrea. METHODS: All children enrolled in the school were examined, and the World Health Organization form for the examination of visually impaired children was used to record the data...
October 19, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29052170/the-histopathological-evaluation-of-small-fiber-neuropathy-in-patients-with-vitamin-b12-deficiency
#3
Hafize Nalan Güneş, Can Ebru Bekircan-Kurt, Ersin Tan, Sevim Erdem-Özdamar
Small fiber neuropathy (SFN), due to loss of A-delta and unmyelinated C fibers, is a cause of neuropathic pain. Although the patients with vitamin B12 deficiency are included in SFN studies in the literature, there is no histopathological study investigating the small fiber loss solely in patients with vitamin B12 deficiency. In this pilot study, we aim to demonstrate the intraepidermal nerve fiber density (IENFD) in skin punch biopsy of patients with vitamin B12 deficiency. Ten patients with vitamin B12 deficiency suffering from neuropathic pain and as control group ten patients with vitamin B12 deficiency without neuropathic pain were included...
October 19, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/29050711/prevalence-of-vitamin-d-deficiency-in-pediatric-patients-with-scoliosis-preparing-for-spinal-surgery
#4
Theresa Mayes, Jennifer M Anadio, Peter F Sturm
BACKGROUND: Establishing prevalence of vitamin D deficiency in elective scoliosis surgery may impact clinical outcomes. The objectives of this study were to document vitamin D status of patients with scoliosis preparing for surgical intervention in order to establish frequency of deficiency and determine characteristics influencing levels. METHODS: Records were queried for patients with scoliosis diagnosis who underwent posterior spinal fusion or initial growing rod placement and had serum vitamin 25 hydroxyvitamin D (D25) recorded in the preoperative period...
November 2017: Spine Deformity
https://www.readbyqxmd.com/read/29050663/vitamin-d-deficiency-induces-eosinophil-spontaneous-activation
#5
Huiying Lu, Rui-Di Xie, Ritian Lin, Cuicui Zhang, Xiao-Jun Xiao, Lin-Jing Li, Zhi-Qiang Liu, Li-Tao Yang, Bai-Sui Feng, Zhan-Ju Liu, Ping-Chang Yang
Eosinophils (Eo) play a critical role in immunity and immune inflammation. The maintenance of Eo homeostasis is not fully understood yet. Vitamin D (VitD) is involved in the regulation of a large number of biochemical reactions. This study tests a hypothesis that VitD receptor (VDR) contributes to the homeostasis of Eos. In this study, EoL-1 cells (an Eo cell line) were cultured in the presence or absence of calcitriol. The Eo-mediators, including major basic protein (MBP), Eo peroxidase (EPX), Eo cationic protein (ECP) and Eo-derived neurotoxin (EDN), were assessed in the culture supernatant and in EoL-1 cells...
October 12, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/29048424/analysis-of-human-cerebrospinal-fluid-monoamines-and-their-cofactors-by-hplc
#6
Marta Batllori, Marta Molero-Luis, Aida Ormazabal, Mercedes Casado, Cristina Sierra, Angels García-Cazorla, Manju Kurian, Simon Pope, Simon J Heales, Rafael Artuch
The presence of monoamines and their cofactors (the pterins and vitamin B6 (pyridoxal phosphate (PLP))) in human cerebrospinal fluid (CSF) can be used as indicators of the biosynthesis and turnover of dopamine and serotonin in the brain. In addition, abnormalities in the CSF levels of these molecules are associated with various neurological diseases, including genetic diseases leading to dopamine and serotonin deficiency. Here, we provide a set of quantitative high-performance liquid-chromatography (HPLC) approaches to determine CSF levels of monoamines and their cofactors...
November 2017: Nature Protocols
https://www.readbyqxmd.com/read/29046199/-association-between-serum-25-oh-d-levels-at-birth-and-bronchopulmonary-dysplasia-in-preterm-infants
#7
Ren-Qiang Yu, Dao-Zhen Chen, Qin Zhou, Min Wang, Ying-Zi Mei, Shan-Yu Jiang
OBJECTIVE: To assess the association between serum 25-hydroxyvitamin D [25(OH)D] levels at birth and bronchopulmonary dysplasia (BPD) in preterm infants. METHODS: This study recruited preterm infants with gestational age of below 34 weeks who were born between January 2014 and December 2016. These preterm infants were classified into two groups: BPD and control. The association between serum 25(OH)D levels at birth and BPD was analyzed. RESULTS: Serum 25(OH)D levels in the BPD group was significantly lower than those in the control group [(37±17 nmol/L vs 47±20 nmol/L; P<0...
October 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29045457/dietary-vitamin-d3-deficiency-exacerbates-sinonasal-inflammation-and-alters-local-25-oh-d3-metabolism
#8
Jennifer K Mulligan, Whitney N Pasquini, William W Carroll, Tucker Williamson, Nicholas Reaves, Kunal J Patel, Elliott Mappus, Rodney J Schlosser, Carl Atkinson
RATIONALE: Patients with chronic rhinosinusitis with nasal polyps (CRSwNP) have been shown to be vitamin D3 (VD3) deficient, which is associated with more severe disease and increased polyp size. To gain mechanistic insights into these observational studies, we examined the impact of VD3 deficiency on inflammation and VD3 metabolism in an Aspergillus fumigatus (Af) mouse model of chronic rhinosinusitis (Af-CRS). METHODS: Balb/c mice were fed control or VD3 deficient diet for 4 weeks...
2017: PloS One
https://www.readbyqxmd.com/read/29044707/the-effect-of-vitamin-d-supplementation-on-bone-metabolic-markers-in-chronic-kidney-disease
#9
Ashok Kumar Yadav, Vivek Kumar, Vinod Kumar, Debasish Banerjee, Krishan Lal Gupta, Vivekanand Jha
Use of active forms of vitamin D is advocated in CKD patients for treatment of mineral bone disease because of the presumption that native forms of vitamin D would not undergo significant activation to calcitriol, the most active biological form of vitamin D. We present secondary analysis looking at bone turnover in subjects who completed the randomized, double blind, placebo controlled trial investigating the effect of cholecalciferol supplementation on vascular function in non-diabetic CKD stage G3-4 and vitamin D ≤20ng/ml [CTRI/2013/05/003648]...
October 17, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29044032/-the-relationship-between-serum-vitamin-d-levels-and-cardiovascular-risk-factors-among-icelandic-children
#10
Thorunn Hannesdottir, Hannes Hrafnkelsson, Erlingur Johannsson, Emil L Sigurdsson
OBJECTIVE: To determine the relationship between serum vitamin D levels and known cardiometabolic risk factors among healthy Icelandic children as well as study these connections independent of body mass index (BMI). METHODS: We assessed the relationship between serum 25-hydroxyvitamin D, adiposity measured as BMI and 7 cardiometabolic risk factors (high blood pressure, total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, triglycerides, blood glucose and serum insulin)...
September 2017: Læknablađiđ
https://www.readbyqxmd.com/read/29043548/comparison-of-short-term-effectiveness-and-postoperative-complications-laparoscopic-gastric-plication-vs-laparoscopic-sleeve-gastrectomy
#11
Mohammad Talebpour, Donya Sadid, Atieh Talebpour, Amirsina Sharifi, Farzad Vaghef Davari
INTRODUCTION: Bariatric surgeries are the only effective long-term treatment in obese patients. The innovation of laparoscopic gastric plication (LGP) raised some questions about its effectiveness compared to traditionally used techniques such as laparoscopic sleeve gastrectomy (LSG). We tried to answer some of these questions. MATERIALS AND METHODS: We investigated 70 patients in a randomized clinical trial (IRCT2013123012294N5) from 2012 to 2015. Thirty-five patients were randomly assigned to each LSG or LGP group, using sealed envelope method...
October 17, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/29042901/vitamin-d-and-hypertension
#12
REVIEW
Hye Yun Jeong, Kyung Mi Park, Mi Jung Lee, Dong Ho Yang, Sang Hoon Kim, So-Young Lee
Vitamin D has the pleiotropic effects in multiple organ systems, and vitamin D deficiency was suggested to be associated with high blood pressure according to previous reports. Several interventional studies have examined the effect of vitamin D supplementation on high blood pressure patients, but the results have been inconsistent. In this article, we examined the literature that have proposed a mechanism involving vitamin D in the regulation of blood pressure and review previous observational and interventional studies that have shown the relationship between vitamin D and hypertension among various populations...
September 2017: Electrolyte & Blood Pressure: E & BP
https://www.readbyqxmd.com/read/29042866/effects-of-cord-blood-vitamin-d-levels-on-the-risk-of-neonatal-sepsis-in-premature-infants
#13
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/29042790/evaluation-of-vitamin-d-levels-in-relation-to-coronary-ct-angiographic-findings-in-an-iranian-population
#14
Maryam Moradi, Ali Foroutanfar
BACKGROUND: Vitamin D deficiency, as a predisposing factor for coronary artery disease (CAD), is a subject of increasing interest. However, its role as a risk factor has not been proven. This study aimed to investigate the relationship between serum vitamin D levels and CAD. MATERIALS AND METHODS: Using a cross-sectional design, 180 patients who were candidates for coronary computed tomography angiography (CCTA) were selected. Serum levels of vitamin D were measured and compared with the results of CCTA (including calcium score, and presence and severity of coronary artery involvement due to atherosclerotic plaques)...
2017: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/29042055/mechanism-underlying-the-suppressor-activity-of-retinoic-acid-on-il4-induced-ige-synthesis-and-its-physiological-implication
#15
Goo-Young Seo, Jeong-Min Lee, Young-Saeng Jang, Seung Goo Kang, Sung-Il Yoon, Hyun-Jeong Ko, Geun-Shik Lee, Seok-Rae Park, Cathryn R Nagler, Pyeung-Hyeun Kim
The present study extends an earlier report that retinoic acid (RA) down-regulates IgE Ab synthesis in vitro. Here, we show the suppressive activity of RA on IgE production in vivo and its underlying mechanisms. We found that RA down-regulated IgE class switching recombination (CSR) mainly through RA receptor α (RARα). Additionally, RA inhibited histone acetylation of germ-line ε (GL ε) promoter, leading to suppression of IgE CSR. Consistently, serum IgE levels were substantially elevated in vitamin A-deficient (VAD) mice and this was more dramatic in VAD-lecithin:retinol acyltransferase deficient (LRAT(-/-)) mice...
October 3, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/29040465/the-fut2-secretor-variant-p-trp154ter-influences-serum-vitamin-b12-concentration-via-holo-haptocorrin-but-not-holo-transcobalamin-and-is-associated-with-haptocorrin-glycosylation
#16
Aneliya Velkova, Jennifer E L Diaz, Faith Pangilinan, Anne M Molloy, James L Mills, Barry Shane, Erica Sanchez, Conal Cunningham, Helen McNulty, Cheryl D Cropp, Joan E Bailey-Wilson, Alexander F Wilson, Lawrence C Brody
Vitamin B12 deficiency is common in older individuals. Circulating vitamin B12 concentration can be used to diagnose deficiency but this test has substantial false positive and false negative rates. We conducted genome-wide association studies (GWAS) in which we resolved total serum vitamin B12 into the fractions bound to transcobalamin and haptocorrin: two carrier proteins with very different biological properties. We replicated reported associations between total circulating vitamin B12 concentrations and a common null variant in FUT2...
October 12, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29040128/single-dose-preoperative-vitamin-d-supplementation-decreases-infection-in-a-mouse-model-of-periprosthetic-joint-infection
#17
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/29037932/retinoic-acid-deficiency-leads-to-an-increase-in-spermatogonial-stem-number-in-the-neonatal-mouse-testis-but-excess-retinoic-acid-results-in-no-change
#18
Kellie S Agrimson, Melissa J Oatley, Debra Mitchell, Jon M Oatley, Michael D Griswold, Cathryn A Hogarth
The onset of spermatogenesis occurs in response to retinoic acid (RA), the active metabolite of vitamin A. However, whether RA plays any role during establishment of the spermatogonial stem cell (SSC) pool is unknown. Because designation of the SSC population and the onset of RA signaling in the testis that induces differentiation have similar timing, this study asked whether RA influenced SSC establishment. Whole mount immunofluorescence and flow cytometric analysis using the Id4-eGfp transgenic reporter mouse line revealed an enrichment for ID4-EGFP+ cells within the testis following inhibition of RA synthesis by WIN 18,446 treatment...
October 13, 2017: Developmental Biology
https://www.readbyqxmd.com/read/29037851/cobalamin-associated-superoxide-scavenging-in-neuronal-cells-is-a-potential-mechanism-for-vitamin-b12-deprivation-optic-neuropathy
#19
Wesley Chan, Mohammadali Almasieh, Maria-Magdalena Catrinescu, Leonard A Levin
Chronic deficiency of vitamin B12 is the only nutritional deficiency definitively proven to cause optic neuropathy and loss of vision. The mechanism by which this occurs is unknown. Optic neuropathies are associated with death of retinal ganglion cells (RGCs), neurons that project their axons along the optic nerve to the brain. Injury to RGC axons causes a burst of intracellular superoxide, which then signals RGC apoptosis. Vitamin B12 (cobalamin) was recently shown to be a superoxide scavenger, with a rate constant similar to superoxide dismutase...
October 13, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29037825/vitamin-d-prevents-lipid-accumulation-in-murine-muscle-through-regulation-of-ppar%C3%AE-and-perilipin-2-expression
#20
Jiarong Li, Milton Mihalcioiu, Lifeng Li, Mahvash Zakikhani, Anne Camirand, Richard Kremer
Vitamin D plays an important role in regulation of skeletal muscle tone and contraction. Serum vitamin D status is linked to muscle power and force in adolescent girls, and vitamin D deficiency is associated with myopathies in children and poorer physical performance in the elderly. We previously reported that vitamin D deficiency is linked to a significant increase in muscle fatty infiltration in healthy young women, and studies in patients with neuromuscular disorders also associate muscle weakening and lipid content...
October 13, 2017: Journal of Steroid Biochemistry and Molecular Biology
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