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Vitamin D immunology

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https://www.readbyqxmd.com/read/28323068/vitamin-d-receptor-expression-and-hepcidin-levels-in-the-protection-or-severity-of-leprosy-a-systematic-review
#1
Ana Laura Grossi de Oliveira, Ana Thereza Chaves, Cristiane Alves Silva Menezes, Nathalia Sernizon Guimarães, Lilian Lacerda Bueno, Ricardo Toshio Fujiwara, Manoel Otávio da Costa Rocha
Leprosy is a chronic infectious disease whose disequilibrium in the host's genetic, immunological and clinical mechanisms lead to distinct manifestations defining the type of immunological response. This review focuses its attention on the influence of the Vitamin D Receptor and hepcidin expressions that can suggest the protection or severity of leprosy.
March 16, 2017: Microbes and Infection
https://www.readbyqxmd.com/read/28272391/stabilizing-short-lived-schiff-base-derivatives-of-5-aminouracils-that-activate-mucosal-associated-invariant-t-cells
#2
Jeffrey Y W Mak, Weijun Xu, Robert C Reid, Alexandra J Corbett, Bronwyn S Meehan, Huimeng Wang, Zhenjun Chen, Jamie Rossjohn, James McCluskey, Ligong Liu, David P Fairlie
Mucosal-associated invariant T (MAIT) cells are activated by unstable antigens formed by reactions of 5-amino-6-D-ribitylaminouracil (a vitamin B2 biosynthetic intermediate) with glycolysis metabolites such as methylglyoxal. Here we show superior preparations of antigens in dimethylsulfoxide, avoiding their rapid decomposition in water (t1/2 1.5 h, 37 °C). Antigen solution structures, MAIT cell activation potencies (EC50 3-500 pM), and chemical stabilities are described. Computer analyses of antigen structures reveal stereochemical and energetic influences on MAIT cell activation, enabling design of a water stable synthetic antigen (EC50 2 nM)...
March 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/28242261/specific-interactions-between-vitamin-d-receptor-and-its-ligands-ab-initio-molecular-orbital-calculations-in-water
#3
Ryosuke Takeda, Ittetsu Kobayashi, Kanako Shimamura, Hiromi Ishimura, Ryushi Kadoya, Kentaro Kawai, Atsushi Kittaka, Midori Takimoto-Kamimura, Noriyuki Kurita
Vitamin D is recognized to play important roles not only in the bone metabolism and the regulation of Ca amount in the blood but also in the onset of immunological diseases. These physiological actions caused by vitamin D are triggered by the specific interaction between vitamin D receptor (VDR) and vitamin D. In the present study, we investigated the interactions between VDR and vitamin D derivatives using ab initio molecular simulation, in order to elucidate the reason for the significant difference in their effects on VDR activity...
February 27, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28237485/effect-of-curcumin-on-expressions-of-nf-%C3%AE%C2%BAbp65-tnf-%C3%AE-and-il-8-in-placental-tissue-of-premature-birth-of-infected-mice
#4
Yan-Zi Guo, Ping He, Ai-Min Feng
OBJECTIVE: To observe the effect of curcumin on expressions of nuclear transcription factor-kappa Bp65 (NF-κBp65), TNF-α and IL-8 in placental tissue of premature birth of infected mice induced by lipopolysaccharide (LPS). METHODS: A total of 60 C57BL/6 mice pregnant with 15 d were collected and randomly divided into control group, model group, treatment group and preventative group. LPS was repeatedly injected in abdominal cavity to construct infected premature birth model, while mice of control group were given with 100 mg/kg of vitamin C through abdominal cavity injection and mice of treatment group and preventative group were given curcumin of 100 mg/kg through abdominal cavity injection after modeling operation and before 1 d of modeling operation, respectively...
February 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28236843/multiple-sclerosis-and-air-pollution-exposure-mechanisms-toward-brain-autoimmunity
#5
Sayed Esmaeil Mousavi, Pouria Heydarpour, Jacques Reis, Masoud Amiri, Mohammad Ali Sahraian
The association between neurodegenerative diseases and environmental exposures, in particular air pollution, has been noticed in the last two decades, but the importance of this environmental factor in multiple sclerosis (MS) pathogenesis has not been considered extensively. However, recent evidence suggests that major mechanisms involved in MS pathogenesis, such as inflammatory factors expression, free radicals overproduction, the blood brain barrier (BBB) breakdown, neuroinflammation, vitamin D deficiency and mitochondrial dysfunction could also occur due to exposure to air pollutants...
March 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28210393/has-vitamin-d-had-its-time-in-the-sun-for-melanoma
#6
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/28183335/efficacy-of-vitamin-d3-supplementation-in-reducing-incidence-of-pulmonary-tuberculosis-and-mortality-among-hiv-infected-tanzanian-adults-initiating-antiretroviral-therapy-study-protocol-for-a-randomized-controlled-trial
#7
Christopher R Sudfeld, Ferdinand Mugusi, Said Aboud, Tumaini J Nagu, Molin Wang, Wafaie W Fawzi
BACKGROUND: HIV-infected adults initiating antiretroviral therapy (ART) in sub-Saharan Africa continue to experience high rates of morbidity and mortality during the initial months of treatment. Observational studies in high-income and resource-limited settings indicate that HIV-infected adults with low vitamin D levels may be at increased risk of mortality, HIV disease progression, and incidence of pulmonary tuberculosis (TB). As a result, vitamin D3 supplementation may improve survival and treatment outcomes for HIV-infected adults initiating ART...
February 10, 2017: Trials
https://www.readbyqxmd.com/read/28164523/effect-of-serum-vitamin-d-levels-on-cellular-immunity-and-antiviral-effects-in-chronic-hepatitis-b-patients
#8
Li-Jie He, He-Ping Zhang, Hong-Juan Li, Jing Wang, Dan-Dan Chang
BACKGROUND: To study the effect of 25-hydroxyl vitamin D3 on peripheral blood T lymphocyte immune function and antiviral effects in chronic hepatitis B patients. METHODS: The clinical data for 70 patients with chronic hepatitis B were analyzed. Serum 25-hydroxyl vitamin D was determined by electrochemical luminescence, and hepatitis B virus serological markers were determined by fluorescence quantitative polymerase chain reaction. Subsets of T lymphocytes were determined by immune fluorescence labeling method...
October 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28094291/differential-effects-of-vitamins-a-and-d-on-the-transcriptional-landscape-of-human-monocytes-during-infection
#9
Tilman E Klassert, Julia Bräuer, Martin Hölzer, Magdalena Stock, Konstantin Riege, Cristina Zubiría-Barrera, Mario M Müller, Silke Rummler, Christine Skerka, Manja Marz, Hortense Slevogt
Vitamin A and vitamin D are essential nutrients with a wide range of pleiotropic effects in humans. Beyond their well-documented roles in cellular differentiation, embryogenesis, tissue maintenance and bone/calcium homeostasis, both vitamins have attracted considerable attention due to their association with-immunological traits. Nevertheless, our knowledge of their immunomodulatory potential during infection is restricted to single gene-centric studies, which do not reflect the complexity of immune processes...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27833053/western-diet-enhances-intestinal-tumorigenesis-in-min-mice-associating-with-mucosal-metabolic-and-inflammatory-stress-and-loss-of-apc-heterozygosity
#10
Mikael Niku, Anne-Maria Pajari, Laura Sarantaus, Essi Päivärinta, Markus Storvik, Anu Heiman-Lindh, Santeri Suokas, Minna Nyström, Marja Mutanen
Western-type diet (WD) is a risk factor for colorectal cancer, but the underlying mechanisms are poorly understood. We investigated the interaction of WD and heterozygous mutation in the Apc gene on adenoma formation and metabolic and immunological changes in the histologically normal intestinal mucosa of Apc(Min/+) (Min/+) mice. The diet used was high in saturated fat and low in calcium, vitamin D, fiber and folate. The number of adenomas was twofold higher in the WD mice compared to controls, but adenoma size, proliferation or apoptosis did not differ...
January 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27827293/vitamin-d-deficiency-behavioral-atypicality-anxiety-and-depression-in-children-with-chromosome-22q11-2-deletion-syndrome
#11
L Kelley, A F P Sanders, E A Beaton
Chromosome 22q11.2 deletion syndrome (22q11.2DS) is a complex developmental disorder with serious medical, cognitive and emotional symptoms across the lifespan. This genetic deletion also imparts a lifetime risk for developing schizophrenia that is 25-30 times that of the general population. The origin of this risk is multifactorial and may include dysregulation of the stress response and immunological systems in relation to brain development. Vitamin D is involved in brain development and neuroprotection, gene transcription, immunological regulation and influences neuronal signal transduction...
December 2016: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/27816874/prevailing-vitamin-d-status-influences-mitochondrial-and-glycolytic-bioenergetics-in-peripheral-blood-mononuclear-cells-obtained-from-adults
#12
Emily K Calton, Kevin N Keane, Mario J Soares, Jordan Rowlands, Philip Newsholme
BACKGROUND: Circulating peripheral blood mononuclear cells (PBMCs) are exposed to metabolic and immunological stimuli that influence their functionality. We hypothesized that prevailing vitamin D status [25(OH)D] would modulate the bioenergetic profile of PBMCs derived from humans. MATERIALS AND METHODS: 38 participants (16 males, 22 females) ranging in body fat from 14-51% were studied. PBMCs were isolated from whole blood, counted and freshly seeded for bioenergetic analysis using the Seahorse XF(e)96 flux analyser...
December 2016: Redox Biology
https://www.readbyqxmd.com/read/27793368/loss-of-placental-thrombomodulin-in-oocyte-donation-pregnancies
#13
Manon Bos, Hans J Baelde, Jan A Bruijn, Kitty W M Bloemenkamp, Marie-Louise P van der Hoorn, Rosanne J Turner
OBJECTIVE: To investigate whether thrombomodulin dysregulation is involved in the development of preeclampsia after oocyte donation (OD). Women who become pregnant after OD are prone to develop preeclampsia, a syndrome characterized by an aberrant immunologic response, hypercoagulability, and endothelial dysfunction. A mediator of inflammation and coagulation is thrombomodulin, which has a possible role to play in this syndrome. DESIGN: Case-control study. SETTING: Not applicable...
January 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/27786545/vitamin-d-levels-in-children-affected-by-vernal-keratoconjunctivitis
#14
Anna Maria Zicari, Arianna Cafarotti, Francesca Occasi, Valeria Lollobrigida, Marcella Nebbioso, Irene Pecorella, Giovanna De Castro, Alberto Spalice, Lorenzo Loffredo, Maria Pia Villa, Marzia Duse
BACKGROUND: Vernal keratoconjunctivitis (VKC) is a chronic and often severe bilateral conjunctivitis. VKC etiology still remains unclear although endocrine, genetic, neurogenic and environmental factors have been implicated. Vitamin D is a fat-soluble prohormone whose main function is the regulation of calcium and phosphate metabolism. The aim of this study was to evaluate serum vitamin D in children affected by VKC compared to the healthy children and investigate the relationship between its levels and disease severity...
February 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/27775585/beneficial-effects-of-uv-radiation-vitamin-d-and-beyond
#15
REVIEW
Christian Trummer, Marlene Pandis, Nicolas Verheyen, Martin R Grübler, Martin Gaksch, Barbara Obermayer-Pietsch, Andreas Tomaschitz, Thomas R Pieber, Stefan Pilz, Verena Schwetz
Aside from its well-known effects on bone and mineral metabolism, vitamin D may also play an important role in extra-skeletal processes like immunologic diseases, cancer, or cardiovascular diseases. Even though meta-analyses showed that vitamin D supplementation reduces fractures, falls, and overall mortality, its potential benefits did not find universal acclaim. Several health care authorities published Recommended Dietary Allowances (RDAs) for vitamin D, most of them ranging from 600 to 800 international units (IU) per day, corresponding to a serum level of 25-hydroxyvitamin D of at least 20 ng/mL (50 nmol/L)...
October 19, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27766084/vitamin-d-deficiency-in-adult-patients-with-schizophreniform-and-autism-spectrum-syndromes-a-one-year-cohort-study-at-a-german-tertiary-care-hospital
#16
Dominique Endres, Rick Dersch, Oliver Stich, Armin Buchwald, Evgeniy Perlov, Bernd Feige, Simon Maier, Andreas Riedel, Ludger Tebartz van Elst
INTRODUCTION: Vitamin D has many immunomodulatory, anti-inflammatory, and neuroprotective functions, and previous studies have demonstrated an association between vitamin D deficiency and neuropsychiatric disease. The aim of our study was to analyze the prevalence of vitamin D deficiency in a 1-year cohort of adult inpatients with schizophreniform and autism spectrum syndromes in a naturalistic inpatient setting in Germany. PARTICIPANTS AND METHODS: Our study was comprised of 60 adult schizophreniform and 23 adult high-functioning autism spectrum patients who were hospitalized between January and December of 2015...
2016: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/27726023/regioselective-hydroxylation-of-cholecalciferol-cholesterol-and-other-sterol-derivatives-by-steroid-c25-dehydrogenase
#17
A Rugor, M Tataruch, J Staroń, A Dudzik, E Niedzialkowska, P Nowak, A Hogendorf, A Michalik-Zym, D B Napruszewska, A Jarzębski, K Szymańska, W Białas, M Szaleniec
Steroid C25 dehydrogenase (S25DH) from Sterolibacterium denitrificans Chol-1S is a molybdenum oxidoreductase belonging to the so-called ethylbenzene dehydrogenase (EBDH)-like subclass of DMSO reductases capable of the regioselective hydroxylation of cholesterol or cholecalciferol to 25-hydroxy products. Both products are important biologically active molecules: 25-hydroxycholesterol is responsible for a complex regulatory function in the immunological system, while 25-hydroxycholecalciferol (calcifediol) is the activated form of vitamin D3 used in the treatment of rickets and other calcium disorders...
February 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27717877/1-25-dihydroxyvitamin-d3-down-modulates-the-production-of-proinflammatory-cytokines-and-nitric-oxide-and-enhances-the-phosphorylation-of-monocyte-expressed-stat6-at-the-recent-onset-type-1-diabetes
#18
Lamia Ysmail-Dahlouk, Wafa Nouari, Mourad Aribi
BACKGROUND: Type 1 diabetes (T1D) is associated with an imbalance between inflammation and repair. Recently, the biologically active form of vitamin D3, i.e. 1,25(OH)2D3, has been reported to have potent immunomodulatory effects on both innate and adaptive immune cells, as well as on the production of their specific cytokines. METHODS: We examined the effect of 1,25(OH)2D3 on the production of proinflammatory Th1/Th17 and anti-inflammatory Th2/Treg related cytokines, as well as on the phosphorylation of monocyte-expressed STAT4 and STAT6 at the recent-onset human T1D...
October 4, 2016: Immunology Letters
https://www.readbyqxmd.com/read/27708971/low-vitamin-d-status-in-systemic-sclerosis-and-the-impact-on-disease-phenotype
#19
Laura Groseanu, Violeta Bojinca, Tania Gudu, Ioana Saulescu, Denisa Predeteanu, Andra Balanescu, Florian Berghea, Daniela Opris, Andreea Borangiu, Cosmin Constantinescu, Magda Negru, Ruxandra Ionescu
OBJECTIVE: Vitamin D has pleiotropic effects including immunomodulatory, cardioprotective, and antifibrotic properties and is thus able to modulate the three main links in scleroderma pathogenesis. The aim of the study was to evaluate the level of vitamin D in patients with systemic sclerosis and to analyze the associations between the concentration of vitamin D and the features of systemic sclerosis. MATERIAL AND METHODS: Fifty-one consecutive patients were evaluated for visceral involvement, immunological profile, activity, severity scores, and quality of life...
June 2016: European Journal of Rheumatology
https://www.readbyqxmd.com/read/27695278/vitamin-d-deficiency-in-egyptian-systemic-lupus-erythematosus-patients-how-prevalent-and-does-it-impact-disease-activity
#20
Nouran M Abaza, Reem M El-Mallah, Asmaa Shaaban, Sameh A Mobasher, Khaled F Al-Hassanein, Amr A Abdel Zaher, Rania H El-Kabarity
BACKGROUND: The emerging role of vitamin D in immunology and autoimmune disorders has been a worldwide interest in the last decade. Systemic lupus erythematosus (SLE) patients are particularly at a delicate position predisposing them to suffer from vitamin D deficiency due to the multiple risk factors accompanying the disease. Whether vitamin D deficiency is also involved as a risk factor for developing SLE and affecting its course is a considerable concern. OBJECTIVES: The objective of this study was to estimate the prevalence of vitamin D deficiency in SLE patients and its relation to disease...
2016: Integrative Medicine Insights
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