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Vitamin D immune system

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https://www.readbyqxmd.com/read/28296915/genetic-variation-in-the-vitamin-d-pathway-cyp2r1-gene-predicts-sustained-hbeag-seroconversion-in-chronic-hepatitis-b-patients-treated-with-pegylated-interferon-a-multicenter-study
#1
Kessarin Thanapirom, Sirinporn Suksawatamnuay, Wattana Sukeepaisarnjareon, Tawesak Tanwandee, Phunchai Charatcharoenwitthaya, Satawat Thongsawat, Apinya Leerapun, Teerha Piratvisuth, Rattana Boonsirichan, Chalermrat Bunchorntavakul, Chaowalit Pattanasirigool, Bubpha Pornthisarn, Supot Tantipanichtheerakul, Ekawee Sripariwuth, Woramon Jeamsripong, Teeranan Sanpajit, Yong Poovorawan, Piyawat Komolmit
Evidence of a role of vitamin D in the immune system is increasing. Low serum vitamin D is associated with increased hepatitis B virus replication. Genome-wide association study (GWAS) data has revealed a number of the single nucleotide polymorphisms (SNPs) within the vitamin D synthetic pathway that affect vitamin D functions. We aimed to determine the association between SNPs in the vitamin D gene cascade and response to pegylated interferon (PegIFN) therapy in hepatitis B e-antigen (HBeAg)-positive patients...
2017: PloS One
https://www.readbyqxmd.com/read/28295622/low-vitamin-d-exposure-is-associated-with-higher-risk-of-infection-in-renal-transplant-recipients
#2
Hari V Kalluri, Lauren M Sacha, Amanda I Ingemi, Michael A Shullo, Heather J Johnson, Puneet Sood, Amit D Tevar, Abhinav Humar, Raman Venkataramanan
BACKGROUND: Vitamin-D is a steroid hormone with multiple vital roles within the immune system. Various studies evaluated the influence of vitamin-D on infections post-renal transplantation and found contrasting results. This study aims to assess the relationship between vitamin-D status and the incidence of infection in renal transplant recipients. METHODS: This is a retrospective cohort study of adult renal transplant recipients at the University of Pittsburgh Medical Center between 2005 and 2012...
March 10, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28288905/bioinformatic-approaches-to-interrogating-vitamin-d-receptor-signaling
#3
Moray J Campbell
Bioinformatics applies unbiased approaches to develop statistically-robust insight into health and disease. At the global, or "20,000 foot" view bioinformatic analyses of vitamin D receptor (NR1I1/VDR) signaling can measure where the VDR gene or protein exerts a genome-wide significant impact on biology; VDR is significantly implicated in bone biology and immune systems, but not in cancer. With a more VDR-centric, or "2000 foot" view, bioinformatic approaches can interrogate events downstream of VDR activity...
March 10, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28285654/gut-microbiota-interactions-with-the-immunomodulatory-role-of-vitamin-d-in-normal-individuals
#4
Renata V Luthold, Gabriel R Fernandes, Ana Carolina Franco-de-Moraes, Luciana G D Folchetti, Sandra Roberta G Ferreira
BACKGROUND: Due to immunomodulatory properties, vitamin D status has been implicated in several diseases beyond the skeletal disorders. There is evidence that its deficiency deteriorates the gut barrier favoring translocation of endotoxins into the circulation and systemic inflammation. Few studies investigated whether the relationship between vitamin D status and metabolic disorders would be mediated by the gut microbiota composition. OBJECTIVE: We examined the association between vitamin D intake and circulating levels of 25(OH)D with gut microbiota composition, inflammatory markers and biochemical profile in healthy individuals...
April 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28282804/ifnar1-expression-level-in-iranian-multiple-sclerosis-patients-treated-with-ifn-b
#5
Arezou Sayad, Mohsen Khakzad Kelarijani, Elham Sajjadi, Mohammad Taheri
BACKGROUND: Multiple sclerosis (MS) as an auto-immune disease is an inflammatory, demyelinating disease of the central nervous system. Certain genes have shown to be involved in the initiation of MS but the specific role of some of them, e.g. IFNAR1 has not been identified in certain populations yet. OBJECTIVE: The IFNAR1 as a type I membrane protein shapes one of the two chains of a receptor for interferons alpha and beta. METHODS: To find out how IFNAR1 functions in the Iranian population, the researchers compared the expression level of this gene in relapsing-remitting MS (RR-MS) samples with normal individuals...
March 3, 2017: Human Antibodies
https://www.readbyqxmd.com/read/28281321/basis-of-bone-metabolism-around-dental-implants-during-osseointegration-and-peri-implant-bone-loss
#6
REVIEW
Angel Insua, Alberto Monje, Hom-Lay Wang, Richard J Miron
BACKGROUND: Despite the growing number of publications in the field of implant dentistry, there are limited studies to date investigating the biology and metabolism of bone healing around dental implants and their implications in peri-implant marginal bone loss. PURPOSE: The aim of this review article is to provide a thorough understanding of the biological events taking place during osseointegration and the subsequent early and late phases of bone remodeling around dental implants...
March 9, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28266114/interaction-of-lifestyle-behaviour-or-systemic-diseases-with-dental-caries-and-periodontal-diseases-consensus-report-of-group-2-of-the-joint-efp-orca-workshop-on-the-boundaries-between-caries-and-periodontal-diseases
#7
Iain L C Chapple, Philippe Bouchard, Maria Grazia Cagetti, Guglielmo Campus, Maria-Clotilde Carra, Fabio Cocco, Luigi Nibali, Philippe Hujoel, Marja L Laine, Peter Lingstrom, David J Manton, Eduardo Montero, Nigel Pitts, Hélène Rangé, Nadine Schlueter, Wim Teughels, Svante Twetman, Cor Van Loveren, Fridus Van der Weijden, Alexandre R Vieira, Andreas G Schulte
Periodontal diseases and dental caries are the most common diseases of humans and the main cause of tooth loss. Both diseases can lead to nutritional compromise and negative impacts upon self-esteem and quality of life. As complex chronic diseases, they share common risk factors, such as a requirement for a pathogenic plaque biofilm, yet they exhibit distinct pathophysiologies. Multiple exposures contribute to their causal pathways, and susceptibility involves risk factors that are inherited (e.g. genetic variants), and those that are acquired (e...
March 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28261027/the-effect-of-vitamin-d-on-clinical-manifestations-and-activity-of-beh%C3%A3-et-s-disease
#8
Nurşad Aslan, Kamile Demirci, Tuba Güler, Fulya Dörtbaş, Ebru Kale
INTRODUCTION: Immune mechanisms have been implemented to have a role in the pathogenesis of Behçet's disease (BD) and vitamin D has been shown to have a regulatory role in the immune system function. AIM: To evaluate the vitamin D levels of BD patients and its relationship between clinical findings and disease activity of BD. MATERIAL AND METHODS: Sixty-eight patients with BD and 70 age- and sex-matched controls were examined retrospectively...
February 2017: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/28246016/gut-specific-delivery-of-t-helper-17-cells-reduces-obesity-and-insulin-resistance-in-mice
#9
Chun-Pyo Hong, Areum Park, Bo-Gie Yang, Chang Ho Yun, Min-Jung Kwak, Gil-Woo Lee, Jung-Hwan Kim, Min Seong Jang, Eun-Jung Lee, Eun-Ji Jeun, Gihoon You, Kwang Soon Kim, Youngwoo Choi, Ji-Hwan Park, Daehee Hwang, Sin-Hyeog Im, Jihyun F Kim, Yoon-Keun Kim, Ju-Young Seoh, Charles D Surh, You-Me Kim, Myoung Ho Jang
BACKGROUND & AIMS: Obesity and metabolic syndrome have been associated with alterations to the intestinal microbiota. However, few studies examined the effects of obesity on the intestinal immune system. We investigated changes in subsets of intestinal CD4+ T-helper (Th) cells with obesity and the effects of gut-tropic Th17 cells in mice on a high-fat diet (HFD). METHODS: We isolated immune cells from small intestine and adipose tissue of C57BL/6 mice fed a normal chow diet or a HFD for 10 weeks and analyzed the cells by flow cytometry...
February 25, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28245457/steroids-and-autoimmunity
#10
Amelia Chiara Trombetta, Marianna Meroni, Maurizio Cutolo
From the middle of the 19th century, it is known that endocrine and immune systems interact bi-directionally in different processes that ensure organism homeostasis. Endocrine and nervous systems have a pivotal role in the balancing of pro- and anti-inflammatory functions of immune system, and constitute a complex circadian neuroendocrine network. Autoimmune diseases have in fact a complex pathogenic origin in which the importance of endocrine system was demonstrated. In this chapter, we will mention the structure and function of steroidal hormones involved in the neuroendocrine immune network and we will address the ways in which endocrine and immune systems influence each other, in a bi-directional fashion...
2017: Frontiers of Hormone Research
https://www.readbyqxmd.com/read/28243241/high-expression-of-antiviral-and-vitamin-d-pathway-genes-are-a-natural-characteristic-of-a-small-cohort-of-hiv-1-exposed-seronegative-individuals
#11
Wbeimar Aguilar-Jimenez, Irma Saulle, Daria Trabattoni, Francesca Vichi, Sergio Lo Caputo, Francesco Mazzotta, Maria T Rugeles, Mario Clerici, Mara Biasin
Natural resistance to HIV-1 infection is influenced by genetics, viral-exposure, and endogenous immunomodulators such as vitamin D (VitD), being a multifactorial phenomenon that characterizes HIV-1-exposed seronegative individuals (HESNs). We compared mRNA expression of 10 antivirals, 5 immunoregulators, and 3 VitD pathway genes by qRT-PCR in cells of a small cohort of 11 HESNs, 16 healthy-controls (HCs), and 11 seropositives (SPs) at baseline, in response to calcidiol (VitD precursor) and/or aldithriol-2-(AT2)-inactivated HIV-1...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28239520/association-of-vitamin-d-status-and-clinical-and-radiological-outcomes-in-a-treated-ms-population-in-poland
#12
Sławomir Wawrzyniak, Emilia Mikołajewska, Ewelina Kuczko-Piekarska, Anna Niezgodzińska-Maciejek, Aleksander Goch
BACKGROUND: Vitamin D influences the immune system significantly. Previous studies have found that vitamin D deficiency in adolescence can play a significant role in increasing the risk of developing autoimmune diseases including multiple sclerosis. The aim of this study was to investigate the relationship between the vitamin D status in serum and clinical and radiological outcomes in a treated population in Poland. METHODS: Inclusion criteria met 83 adult patients aged 20-61 years with diagnosis of relapsing-remitting multiple sclerosis, who underwent immunomodulatory treatment which lasted at least 12 months...
February 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28229285/topics-on-vitamin-d-in-systemic-lupus-erythematosus-analysis-of-evidence-and-critical-literature-review
#13
António Marinho, Mariana Taveira, Carlos Vasconcelos
Systemic lupus erythematosus (SLE) is a systemic autoimmune disease with multiorgan inflammation, linked to the loss of immune tolerance to self-antigens and the production of a diversity of autoantibodies. The phenotype and progression of SLE have been linked to a combination of environmental, genetic, and hormonal factors. One such environmental factor is vitamin D, a vital hormone with well-established effects on mineral metabolism, skeletal health, and effects on cardiovascular system. The purpose of this article is to make the analysis of evidence and literature review of the pleomorphic effects of Vitamin D in SLE...
February 22, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28229060/vitamin-d-levels-in-children-with-adenotonsillar-hypertrophy-and-otitis-media-with-effusion
#14
Alimohamad Asghari, Zohreh Bagheri, Maryam Jalessi, Mohammad Mahdi Salem, Elahe Amini, Sahand GhalehBaghi, Sepideh Bakhti
INTRODUCTION: Vitamin D has been suggested to play a considerable role in the function of the immune system in various infectious, inflammatory, and autoimmune conditions. Otitis media with effusion (OME), defined as the presence of non-purulent fluid within the middle ear without signs or symptoms of suppurative otitis media, has a number of inflammatory predisposing factors. This study was designed to explore the association between vitamin D deficiency and OME. MATERIALS AND METHODS: In this cross-sectional study, 74 children aged 2-7 years with an obstructive indication for adenotonsillectomy were included...
January 2017: Iranian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28210393/has-vitamin-d-had-its-time-in-the-sun-for-melanoma
#15
Christopher J Huerter, Adam Vaudreuil, Devendra K Agrawal, Austin Huy Nguyen
Growing evidence suggests a pivotal role for vitamin D in cancers, particularly melanoma. The broad immunologic effects of vitamin D and its signaling axis make for a complex interplay between tumor cells and the immune system. Preclinical evidence suggests vitamin D to have protective effects in melanoma oncogenesis and progression, creating a potential role for vitamin D supplementation in cancer prevention and/or adjuvant therapy. In this commentary, the authors highlight studies of vitamin D in melanoma with clinical implications and call for large clinical trials to definitively determine the role of supplementation in patients to prevent and help treat melanoma...
December 2016: Journal of Clinical and Aesthetic Dermatology
https://www.readbyqxmd.com/read/28184013/phosphatidylserine-sensing-by-tam-receptors-regulates-akt-dependent-chemoresistance-and-pd-l1-expression
#16
Canan Kasikara, Sushil Kumar, Stanley Kimani, Wen-I Tsou, Ke Geng, Viralkumar Davra, Ganapathy Sriram, Connor Devoe, Khanh-Quynh Nguyen, Anita Antes, Allen Krantz, Grzegorz Rymarczyk, Andrzej Wilczynski, Cyril Empig, Bruce D Freimark, Michael Gray, Kyle Schlunegger, Jeff Hutchins, Sergei V Kotenko, Raymond B Birge
Tyro3, Axl and Mertk (collectively TAM receptors) are three homologous receptor tyrosine kinases (RTKs) that bind vitamin K-dependent endogenous ligands, Protein S (ProS) and Growth arrest specific factor 6 (Gas6), and act as bridging molecules to promote phosphatidylserine (PS)-mediated clearance of apoptotic cells (efferocytosis). TAM receptors are overexpressed in a vast array of tumor types, whereby the level of expression correlates with the tumor grade and the emergence of chemo- and radio-resistance to targeted therapeutics, but also have been implicated as inhibitory receptors on infiltrating myeloid-derived cells in the tumor microenvironment (TME) that can suppress host anti-tumor immunity...
February 9, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28143686/vitamin-d-reduces-high-fat-diet-induced-weight-gain-and-c-reactive-protein-increases-interleukin-10-and-reduces-cd86-and-caspase-3
#17
Asmaa M S Gomaa, Ebtihal A Abd El-Aziz
Obesity can be associated with dysfunction of the immune system. An increased risk of obesity has been reported among individuals with low levels of vitamin D. However, much is still unknown about the link between vitamin D and dysfunction of the spleen and immune system in obesity. Therefore, the objectives of this study were to evaluate the effects of a high-fat diet (HFD) on the spleen and immune system and to determine the protective effects of chronic treatment with vitamin D in reversing the detrimental effects of HFD...
March 2017: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/28130504/early-life-nutritional-exposures-and-lifelong-health-immediate-and-long-lasting-impacts-of-probiotics-vitamin-d-and-breastfeeding
#18
Cristiana Berti, Carlo Agostoni, Riccardo Davanzo, Elina Hyppönen, Erika Isolauri, Helle M Meltzer, Régine P M Steegers-Theunissen, Irene Cetin
Pregnancy and infancy comprise the most critical stages for conditioning an individual's health, with a number of implications for subsequent risks of morbidity, mortality, and reproductive health. Nutrition may influence both the overall pregnancy outcome and the growth trajectory and immune system of the fetus and infant, with short- and long-term effects on the health of the offspring. Within this context, leading experts at Expo Milano 2015 in Milan, Italy, discussed up-to-date knowledge while providing suggestions and challenges before, during, and after pregnancy...
January 27, 2017: Nutrition Reviews
https://www.readbyqxmd.com/read/28126203/skin-derived-tslp-systemically-expands-regulatory-t-cells
#19
Theresa M Leichner, Atsushi Satake, Victor Sanoe Harrison, Yukinori Tanaka, Angela S Archambault, Brian S Kim, Mark C Siracusa, Warren J Leonard, Ali Naji, Gregory F Wu, David Artis, Taku Kambayashi
Regulatory T cells (Tregs) are a subset of CD4(+) T cells with suppressive function and are critical for limiting inappropriate activation of T cells. Hence, the expansion of Tregs is an attractive strategy for the treatment of autoimmune diseases. Here, we demonstrate that the skin possesses the remarkable capacity to systemically expand Treg numbers by producing thymic stromal lymphopoietin (TSLP) in response to vitamin D receptor stimulation. An ∼2-fold increase in the proportion and absolute number of Tregs was observed in mice treated topically but not systemically with the Vitamin D3 analog MC903...
January 23, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28094339/massive-effect-on-lncrnas-in-human-monocytes-during-fungal-and-bacterial-infections-and-in-response-to-vitamins-a-and-d
#20
Konstantin Riege, Martin Hölzer, Tilman E Klassert, Emanuel Barth, Julia Bräuer, Maximilian Collatz, Franziska Hufsky, Nelly Mostajo, Magdalena Stock, Bertram Vogel, Hortense Slevogt, Manja Marz
Mycoses induced by C.albicans or A.fumigatus can cause important host damage either by deficient or exaggerated immune response. Regulation of chemokine and cytokine signaling plays a crucial role for an adequate inflammation, which can be modulated by vitamins A and D. Non-coding RNAs (ncRNAs) as transcription factors or cis-acting antisense RNAs are known to be involved in gene regulation. However, the processes during fungal infections and treatment with vitamins in terms of therapeutic impact are unknown...
January 17, 2017: Scientific Reports
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