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Vitamin D immune system

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https://www.readbyqxmd.com/read/28518221/micronutrient-supplementation-in-adults-with-hiv-infection
#1
REVIEW
Marianne E Visser, Solange Durao, David Sinclair, James H Irlam, Nandi Siegfried
BACKGROUND: Micronutrient deficiencies are common among adults living with HIV disease, particularly in low-income settings where the diet may be low in essential vitamins and minerals. Some micronutrients play critical roles in maintenance of the immune system, and routine supplementation could therefore be beneficial. This is an update of a Cochrane Review previously published in 2010. OBJECTIVES: To assess whether micronutrient supplements are effective and safe in reducing mortality and HIV-related morbidity of HIV-positive adults (excluding pregnant women)...
May 18, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28511692/vitamin-d-receptor-activation-reduces-inflammatory-cytokines-and-plasma-micrornas-in-moderate-chronic-kidney-disease-a-randomized-trial
#2
Ladan Mansouri, Kristina Lundwall, Ali Moshfegh, Stefan H Jacobson, Joachim Lundahl, Jonas Spaak
BACKGROUND: Chronic kidney disease (CKD) is a major risk factor for cardiovascular disease (CVD), partly due to endothelial dysfunction and chronic inflammation. Vitamin D treatment in end stage renal disease is suggested to modulate the immune system and lead to improved outcomes. We and others have demonstrated that treatment with vitamin D or activated vitamin D analogues protects the endothelial function in less severe renal disease as well. Since the endothelial protection might be mediated by vitamin D effects on inflammation, we assessed levels of pro-inflammatory cytokines and micro RNAs (miRs) in patients with moderate CKD, treated with an active vitamin D analogue (paricalcitol)...
May 16, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28508087/the-vitamin-d-for-enhancing-the-immune-system-in-cystic-fibrosis-disc-trial-rationale-and-design-of-a-multi-center-double-blind-placebo-controlled-trial-of-high-dose-bolus-administration-of-vitamin-d3-during-acute-pulmonary-exacerbation-of-cystic-fibrosis
#3
Vin Tangpricha, Ellen M Smith, Jose Binongo, Suzanne E Judd, Thomas R Ziegler, Seth Walker, Rabindra Tirouvanziam, Susu M Zughaier, Moon Jeong Lee, Supavit Chesdachai, Wendy A Hermes, James F Chmiel, Amit Gaggar, Ruth E Grossmann, Patricia M Joseph, Jessica A Alvarez
Vitamin D deficiency is highly prevalent in children and adults with cystic fibrosis (CF). Recent studies have found an association between vitamin D status and risk of pulmonary exacerbations in children and adults with CF. The ongoing Vitamin D for enhancing the Immune System in Cystic fibrosis (DISC) study is a multi-center, double-blind, randomized, placebo-controlled trial that will test the hypothesis of whether high dose vitamin D given as a single oral bolus of 250,000 IU to adults with CF during a pulmonary exacerbation followed by a maintenance dose of vitamin D will improve time to next pulmonary exacerbation and re-hospitalization, improve survival and lung function compared to placebo and reduce the rates of pulmonary exacerbation,...
June 2017: Contemporary Clinical Trials Communications
https://www.readbyqxmd.com/read/28491095/angelica-sinensis-polysaccharide-prevents-hematopoietic-stem-cells-senescence-in-d-galactose-induced-aging-mouse-model
#4
Xinyi Mu, Yanyan Zhang, Jing Li, Jieyu Xia, Xiongbin Chen, Pengwei Jing, Xiaoying Song, Lu Wang, Yaping Wang
Age-related regression in hematopoietic stem/progenitor cells (HSC/HPCs) limits replenishment of the blood and immune system and hence contributes to hematopoietic diseases and declined immunity. In this study, we employed D-gal-induced aging mouse model and observed the antiaging effects of Angelica Sinensis Polysaccharide (ASP), a major active ingredient in dong quai (Chinese Angelica Sinensis), on the Sca-1(+) HSC/HPCs in vivo. ASP treatment prevents HSC/HPCs senescence with decreased AGEs levels in the serum, reduced SA-β-Gal positive cells, and promoted CFU-Mix formation in the D-gal administrated mouse...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28487837/the-role-of-vitamin-d-in-allergic-rhinitis
#5
REVIEW
Hui-Qin Tian, Lei Cheng
Recent studies suggest that vitamin D is related to allergic rhinitis (AR). In this review, we first discuss the physiology and metabolism of vitamin D, then we review the function of vitamin D in the immune system, and above all, we highlight the current research regarding the role of vitamin D in AR. Finally, we find that there are both experimental and clinical studies showing that vitamin D is associated with AR, although the results are not consistent and even conflicting. Evidences from those clinical studies show a slightly tendency that serum vitamin D level might be inversely associated with the risk of AR...
April 2017: Asia Pacific Allergy
https://www.readbyqxmd.com/read/28463086/vitamin-d-counteracts-an-il-23-dependent-il-17a-ifn%C3%AE-response-driven-by-urban-particulate-matter
#6
Elizabeth H Mann, Tzer-Ren Ho, Paul E Pfeffer, Nick C Matthews, Elfy Chevretton, Ian Mudway, Frank J Kelly, Catherine M Hawrylowicz
Urban particulate matter (UPM) air pollution and vitamin D deficiency are detrimentally associated with respiratory health; this is hypothesised to be due in part to regulation of IL-17A, which UPM is reported to promote. Here we use a myeloid (m)DC-memory CD4+ T cell co-culture system to characterize UPM-driven IL-17A+ cells, investigate the mechanism by which UPM-primed DCs promote this phenotype and address evidence for cross-regulation by vitamin D. CD1c+ mDCs were cultured overnight with or without a reference source of UPM and/or active vitamin D (1,25(OH)2D3) before co-culturing with autologous memory CD4+ T cells...
May 2, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28462710/endothelial-progenitor-cells-as-mediators-of-the-crosstalk-between-vascular-repair-and-immunity-lessons-from-systemic-autoimmune-diseases
#7
Javier Rodríguez-Carrio, Patricia López, Ana Suárez
From the discovery of Endothelial Progenitor Cells (EPC), these bone marrow-derived precursors have been placed as crucial mediators of the endothelial repair. Accordingly, altered levels and function of EPC have been found in different scenarios of CV risk. Despite the fact that EPC exhibit important characteristics which support a link of this cell subset with a number of inflammatory and immune networks, little is known on the actual mediators involved and the clinical relevance of these features. Systemic diseases are generally hallmarked by a vascular repair failure and increased cardiovascular disease occurrence, EPC impairment having a pivotal role...
April 27, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28461074/vitamin-d-endocrinology-on-the-cross-road-between-immunity-and-metabolism
#8
REVIEW
An-Sofie Vanherwegen, Conny Gysemans, Chantal Mathieu
The effects of vitamin D on the immune function have been recognized for more than a quarter of a century. However, our understanding of the multifactorial nature of the effects of vitamin D at the cellular, molecular and metabolic level in different immune subsets of the innate and adaptive system has dramatically progressed during the last decades. In this review, we summarize the main metabolic pathways preferentially used in different subsets of T cells, B cells, macrophages and dendritic cells as well as the immunomodulatory effects of vitamin D on these cells...
April 28, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28460623/vitamin-d-metabolism-and-potential-effects-of-vitamin-d-receptor-modulation-in-chronic-kidney-disease
#9
Antonio Bellasi, Andrea Galassi, Michela Mangano, Luca Di Lullo, Mario Cozzolino
Vitamin D deficiency is one determinant of secondary hyperparathyroidism in the course of Chronic Kidney Disease (CKD). However, numerous studies support the notion that vitamin D may exert pleiotropic effects aside of mineral metabolism control. Indeed, vitamin D receptor has been identified in a great variety of tissues and its activation contributes to the parathyroid, intestine, cardiovascular and immune system regulation. We herein review vitamin D metabolism and effects with a specific emphasis on the potential impact of vitamin D receptor modulation aside from parathyroid hormone control...
April 26, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28457494/vitamin-d-status-and-the-host-resistance-to-infections-what-it-is-currently-not-understood
#10
Pierre Olivier Lang, Richard Aspinall
PURPOSE: Vitamin D is increasingly thought to play a role in regulating immunity. This comprehensive review updates the current understanding regarding ways in which we believe that vitamin D regulates responsiveness of the immune system and how serum status modulates the host defense against pathogens. METHODS: The literature was searched by using PubMed and Scopus with the following key words: vitamin D, immunity, innate and adaptive immunity, infectious disease, and vaccine response...
April 27, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28446555/higher-serum-25-oh-d-concentrations-are-associated-with-improved-fev1-and-fvc-in-adolescence
#11
Claudia Flexeder, Elisabeth Thiering, Sibylle Koletzko, Dietrich Berdel, Irina Lehmann, Andrea von Berg, Barbara Hoffmann, Carl-Peter Bauer, Joachim Heinrich, Holger Schulz
Vitamin D plays a role in the development of the immune system and the lung, as well as in airway remodelling. Therefore, this study investigated the association between serum 25-hydroxyvitamin D (25(OH)D) concentrations and spirometric lung function parameters at age 15 years.In the German birth cohorts GINIplus and LISAplus, lung function testing by spirometry and 25(OH)D measurements were performed during the 15-year follow-up examinations. Valid lung function measurements pre- and/or post-bronchodilation and serum 25(OH)D concentrations, which were adjusted for the date of blood sampling to account for seasonal variability, were available for 2607 adolescents...
April 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28438353/the-role-of-vitamin-d-in-the-immune-system-as-a-pro-survival-molecule
#12
REVIEW
Salvatore Chirumbolo, Geir Bjørklund, Andrea Sboarina, Antonio Vella
PURPOSE: Vitamin D is a fascinating and attractive molecule that has gained particular attention in medicine in recent years. Its immunomodulatory and anti-inflammatory potential might resemble the activity of many nature-derived molecules (eg, flavonoids), but its role in biology was selected during a long evolutionary pathway to dampen the damaging effect of cell stress response and of the immune reaction. In this sense, this molecule can be considered an ancient hormone that serves, in its primary role, as a pro-survival agent...
April 21, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28431765/immune-modulation-by-vitamin-d-special-emphasis-on-its-role-in-prevention-and-treatment-of-cancer
#13
REVIEW
Franco Pandolfi, Laura Franza, Claudia Mandolini, Pio Conti
PURPOSE: Vitamin D has been known to be involved in mineral and bone homeostasis for many years. In the past its main use was in treating osteoporosis and rickets. In recent years it was found that vitamin D is an immune-modulating agent and may also have a role in several diseases, including autoimmune diseases. The immune-modulating effects appear to be mediated by vitamin D interaction with the vitamin D receptor (VDR) that has transcriptional effects and is expressed on various cell types, especially those of the immune system...
April 18, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28430709/vitamin-d3-repressed-astrocyte-activation-following-lipopolysaccharide-stimulation-in-vitro-and-in-neonatal-rats
#14
Ke-Ping Jiao, Shao-Min Li, Wen-Yan Lv, Ming-Liang Jv, Hai-Yan He
Vitamin D3 has been reported to be an immunity modulator and high levels of vitamin D3 are correlated with a decreased risk for developing diseases in the central nervous system. Astrocytes are important immune cells and contribute toward inflammation during neurological diseases. The vitamin D receptor has been reported to be expressed in astrocytes; however, the effect of vitamin D3 on astrocyte activation has not been studied. Here, we found that lipopolysaccharide stimulation in astrocytes could enhance the expression of vitamin D receptor and Cyp27B1, which encodes the enzyme for converting vitamin D3 into its active form...
April 20, 2017: Neuroreport
https://www.readbyqxmd.com/read/28425954/inherited-variation-in-vitamin-d-genes-and-type-1-diabetes-predisposition
#15
REVIEW
Marissa Penna-Martinez, Klaus Badenhoop
The etiology and pathophysiology of type 1 diabetes remain largely elusive with no established concepts for a causal therapy. Efforts to clarify genetic susceptibility and screening for environmental factors have identified the vitamin D system as a contributory pathway that is potentially correctable. This review aims at compiling all genetic studies addressing the vitamin D system in type 1 diabetes. Herein, association studies with case control cohorts are presented as well as family investigations with transmission tests, meta-analyses and intervention trials...
April 20, 2017: Genes
https://www.readbyqxmd.com/read/28417621/inverse-relation-between-mxa-gene-expression-and-age-in-multiple-sclerosis-patients-reveals-a-gender-difference-in-response-to-interferon-therapy
#16
Mohammad Taheri, Mohammadreza Mirinezhad, Mir Davood Omrani, Elham Sajjadi, Hidetoshi Inoko, Arezou Sayad
Multiple sclerosis (MS) is an inflammatory, multifocal, immune-mediated disease of the central nervous system that women are at a higher risk to acquire than men. Myxovirus resistance protein A (MxA) is used as a predictive marker of bioactivity of interferon-beta (IFN-β) therapy in MS patients. This study was undertaken in west of Iran to investigate gender differences in the expression level of MxA in relapsing-remitting MS (RRMS) patients receiving IFN-β therapy, compared with untreated normal individuals...
February 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28413173/25-hydroxyvitamin-d-serum-level-in-hashimoto-s-thyroiditis-but-not-graves-disease-is-relatively-deficient
#17
Wencai Ke, Tiange Sun, Yanan Zhang, Leqi He, Qiang Wu, Jun Liu, Bingbing Zha
Vitamin D is a modulator of both the innate and adaptive immune system. As vitamin D deficiency was a risk factor for some autoimmune diseases, we aimed to evaluate the serum vitamin D levels in autoimmune thyroid diseases (AITD) including Graves’ disease (GD) and Hashimoto’s thyroiditis (HT) and investigated the association between serum vitamin D levels and AITD. 175 AITD patients including 51 GD, 61 euthyroid HT (mild HT), 63 euthyroid HT patients with hypothyroidism receiving hormone therapy (treated HT) were recruited from the outpatient department...
April 11, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28396640/vitamin-d-deficiency-as-a-potential-environmental-risk-factor-in-multiple-sclerosis-schizophrenia-and-autism
#18
REVIEW
Eva Kočovská, Fiona Gaughran, Amir Krivoy, Ute-Christiane Meier
In this short review, we want to summarize the current findings on the role of vitamin-D in multiple sclerosis (MS), schizophrenia, and autism. Many studies have highlighted hypovitaminosis-D as a potential environmental risk factor for a variety of conditions such as MS, asthma, cardiovascular disease, and, more recently, psychiatric diseases. However, whether hypovitaminosis-D is a potential causative factor for the development or activity in these conditions or whether hypovitaminosis-D may be due to increased vitamin-D consumption by an activated immune system (reverse causation) is the focus of intense research...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28386263/adaptive-immunity-is-the-key-to-the-understanding-of-autoimmune-and-paraneoplastic-inflammatory-central-nervous-system-disorders
#19
REVIEW
Robert Weissert
There are common aspects and mechanisms between different types of autoimmune diseases such as multiple sclerosis (MS), neuromyelitis optica spectrum disorders (NMOSDs), and autoimmune encephalitis (AE) as well as paraneoplastic inflammatory disorders of the central nervous system. To our present knowledge, depending on the disease, T and B cells as well as antibodies contribute to various aspects of the pathogenesis. Possibly the events leading to the breaking of tolerance between the different diseases are of great similarity and so far, only partially understood...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28385183/vitamin-d-receptor-gene-polymorphisms-are-associated-with-multiple-sclerosis-in-mexican-adults
#20
Víctor Hugo Bermúdez-Morales, Geny Fierros, Roberto Lopez Lopez, Gaby Martínez-Nava, Mario Flores-Aldana, José Flores-Rivera, Carlos Hernández-Girón
BACKGROUND: Multiple sclerosis (MS) is the most prevalent autoimmune inflammatory demyelinating disease of the central nervous system (CNS) in young adults. More than 50 genomic regions have been associated with MS susceptibility. Due the important immune-modulating properties of Vitamin D, Vitamin D receptor (VDR) gene polymorphisms - which interfere with the actions of Vitamin D- could be related to increased risk of MS. METHODS: We studied 120 patients fulfilling the McDonald criteria for MS (81 females and 39 males) and 180 healthy unrelated controls, nested in a case-Control study, and were recruited from the National Institute of Neurology and Neurosurgery, Manuel Velasco Suárez in Mexico City...
May 15, 2017: Journal of Neuroimmunology
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