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Vitamin D infections

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https://www.readbyqxmd.com/read/29150278/a-hypothetical-role-for-notch-signaling-pathway-in-immunopathogenesis-of-leprosy
#1
Héctor Serrano-Coll, Liliana Acevedo-Saenz, Nora Cardona-Castro
Leprosy is a chronic infectious disease caused by Mycobacterium leprae mainly affecting skin and peripheral nerves. Leprosy has a broad range of clinical manifestations that range from mild (tuberculoid leprosy) to severe (lepromatous leprosy) forms, and are highly dependent on the host's immune response. Among the immune response elements involved in the pathogenesis of leprosy are the Toll-like receptors (TLRs), vitamin D receptor (VDR), natural killer cells (NK), and T cells. These innate and adaptive immune response elements may be related to the Notch signaling pathway, which is involved in immune cell growth, differentiation, and proliferation...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29141752/differences-in-nutritional-and-health-status-in-school-children-from-the-highlands-and-lowlands-of-bolivia
#2
Graciela Terán, Washington Cuna, Froilán Brañez, Kristina E M Persson, Martín E Rottenberg, Susanne Nylén, Celeste Rodriguez
Children in the Bolivian Andes are exposed to endemic infections and meager nourishment, and live under poor hygienic conditions. The prevention of children malnutrition is a priority in many countries including Bolivia. In this study, the health status of schoolchildren in Taraco, a Puna district, at 4,000 meters above sea level (masl) and in Caranavi, at 650 masl in the wealthier subtropical valleys, was compared. The weight, height, and hematological and biochemical parameters in blood, parasites in stool, and clinical information in 120 children from rural Taraco and in 96 from semi-urban Caranavi, both predominantly of Aymara ethnicity, were registered...
November 6, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29140875/bone-mineral-density-declines-twice-as-quickly-among-hiv-infected-women-compared-to-men
#3
Kristine M Erlandson, Jordan E Lake, Myung Sim, Julian Falutz, Carla M Prado, Ana Rita Domingues da Silva, Todd T Brown, Giovanni Guaraldi
BACKGROUND: Initial declines in bone mineral density (BMD) following antiretroviral therapy (ART) initiation in HIV are well described, but data on long-term changes and risk factors for decline, particularly among women, are limited. METHODS: HIV-infected men and women in the Modena Metabolic Clinic underwent dual-energy X-ray absorptiometry (DXA) scans every 6-12 months for up to 10 years (median 4.6 years). Mixed effect regression model in combined and sex-stratified models determined annual rates of decline and clinical factors associated with BMD...
November 11, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29139249/-clinical-features-analysis-of-qingkailing-injection-for-adolescent-patients-based-on-real-world-his
#4
Li-Zhen Chen, Yan-Ming Xie, Lian-Xin Wang, Yin Zhang, Qun Wang, Ping-Ping Jia, Bo Feng
To explore the clinical application features of Qingkailing injection for adolescent patients. This study was based on the information from the hospitalized patients in 1998-2011 in HIS (hospital information system) of 16 tertiary hospitals in China. 615 adolescent patients with Qingkailing injection were used to investigate the clinical characteristics of Qingkailing injection. Apriori algorithm was adopted to establish the model, and Clementine 12.0 was used for correlation analysis. The results showed that male patients (355 cases) were more than female patients (243 cases); the age of the most patients was under 14 years old, with an average age of 9...
August 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29136775/high-parathyroid-hormone-concentration-in-tenofovir-treated-patients-are-due-to-inhibition-of-calcium-sensing-receptor-activity
#5
Alessandra Mingione, Katia Maruca, Federica Chiappori, Francesca Pivari, Caterina Brasacchio, Tiziana Quirino, Ivan Merelli, Laura Soldati, Paolo Bonfanti, Stefano Mora
Bone health impairment is a common finding in HIV-infected patients on antiretroviral treatment. High serum parathyroid hormone (PTH) concentration in patients on antiretroviral treatment containing tenofovir disoproxil fumarate (TDF) has been reported. Hyperparathyroidism was not always sustained by a reduction in vitamin D concentration. We thus hypothesized a direct inhibitory effect of TDF on the Calcium-sensing receptor (CaSR), leading to hyperparathyroidism. Human embryonic kidney cells were transfected with CASR wild-type gene or mutated in different sites (N124K, T1051G, C788T, T888M)...
November 7, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29128760/vitamin-d-deficiency-in-children-with-recurrent-respiratory-infections-with-or-without-immunoglobulin-deficiency
#6
Nel Dąbrowska-Leonik, Ewa Bernatowska, Małgorzata Pac, Wiktor Filipiuk, Jan Mulawka, Barbara Pietrucha, Edyta Heropolitańska-Pliszka, Katarzyna Bernat-Sitarz, Beata Wolska-Kuśnierz, Bożena Mikołuć
PURPOSE: The objective of this study was to evaluate thevitamin D concentration in patients with recurrent respiratory infections with or without immunoglobulin G, A or M (IgG, IgA, IgM) deficiency, and to find a correlation between the vitamin D concentration and the response to hepatitis B vaccination. MATERIALS AND METHOD: The study involved 730 patients with recurrent respiratory infections. The concentration of 25-hydroxyvitamin D (25(OH)D), immunoglobulins G, A and M, anti-HBs was determined...
November 9, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/29128634/vitamin-d-receptor-vdr-polymorphisms-are-associated-to-spontaneous-preterm-birth-and-maternal-aspects
#7
N R Javorski, C A D Lima, L V C Silva, S Crovella, J de Azêvedo Silva
Preterm birth (PTB) is featured by less than 37weeks of gestational age or fewer than 259days since the first day from the last menstrual period. Complications of PTB are the major cause of neonatal deaths, several factors are linked to PTB increased risk including immunological and genetics. Vitamin D plays an important role in immune response modulation and its action occurs through the vitamin D receptor (VDR), which recently has been described as overexpressed in human placenta during the pregnancy. Herein we assessed two single nucleotide polymorphisms (SNPs) FokI (rs2228570 A>G) and Cdx-2 (rs11568820 T>C), within VDR, using TaqMan fluorogenic probes, and differential susceptibility to SPTB...
November 8, 2017: Gene
https://www.readbyqxmd.com/read/29112476/cross-sectional-evaluation-of-plasma-vitamin-d-levels-in-a-large-cohort-of-italian-patients-with-pediatric-autoimmune-neuropsychiatric-disorders-associated-with-streptococcal-infections
#8
Stefano Stagi, Gemma Lepri, Donato Rigante, Marco Matucci Cerinic, Fernanda Falcini
BACKGROUND: Pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections (PANDAS) are immune-mediated diseases characterized by obsessive-compulsive symptoms and/or tics triggered by group A Streptococcus infections. Despite the well-known action of 25-hydroxyvitamin D [25(OH)D] on different conditions driven by systemic inflammation, there are no data about the 25(OH)D status in patients with PANDAS. AIMS: To evaluate plasma 25(OH)D levels in a large cohort of children and adolescents with PANDAS and comparing the results with healthy controls...
November 7, 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/29109124/endogenous-calcitriol-synthesis-controls-the-humoral-ige-response-in-mice
#9
Juliane Lindner, Sebastian Rausch, Sandra Treptow, Kerstin Geldmeyer-Hilt, Tina Krause, René St-Arnaud, Alice Arabian, Andreas Radbruch, Susanne Hartmann, Margitta Worm, Guido Heine
The vitamin D receptor participates in the control of IgE class-switch recombination in B cells. The physiologic vitamin D receptor agonist, 1,25(OH)2D3 (calcitriol), is synthesized by the essential enzyme 25-hydroxyvitamin D3-1α-hydroxylase (CYP27B1), which can be expressed by activated immune cells. The role of endogenous calcitriol synthesis for the regulation of IgE has not been proven. In this study, we investigated IgE-responses in Cyp27b1-knockout (KO) mice following sensitization to OVA or intestinal infection with Heligmosomoides polygyrus Specific Igs and plasmablasts were determined by ELISA and ELISpot, Cyp27b1 expression was measured by quantitative PCR...
November 6, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29102433/effect-of-vitamin-d-supplementation-on-non-skeletal-disorders-a-systematic-review-of-meta-analyses-and-randomised-trials
#10
REVIEW
Philippe Autier, Patrick Mullie, Alina Macacu, Miruna Dragomir, Magali Boniol, Kim Coppens, Cécile Pizot, Mathieu Boniol
Randomised trials reported up to Dec 31, 2012, did not confirm that vitamin D supplementation could protect from non-skeletal health conditions affecting adults, as was expected on the basis of data from observational studies. To examine whether the more recently published meta-analyses and trials would change past conclusions, we systematically reviewed meta-analyses of vitamin D supplementation and non-skeletal disorders published between Jan 1, 2013, and May 31, 2017, that included study participants of all ages, including pregnant women...
October 25, 2017: Lancet Diabetes & Endocrinology
https://www.readbyqxmd.com/read/29101656/impact-of-enteric-health-and-mucosal-permeability-on-skeletal-health-and-lameness-in-poultry
#11
L R Bielke, B M Hargis, J D Latorre
Intestinal barrier leakage and/or altered gut microbial composition has been shown to markedly impact both osteoblast and osteoclast activities, systemically through circulation of gut immune cells and cytokines and locally by causing inflammation of extraintestinal organs such as the liver and bone marrow. Mild cases of heightened intestinal inflammation can cause bone loss in male mice in the absence of any overt nutritional deficiencies or weight loss, which has also been shown in chickens that have been infected with Salmonella...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29096686/vaso-vitamin-d-and-arthroplasty-surgery-outcomes-study-supplementation-of-vitamin-d-deficiency-to-improve-outcomes-after-total-hip-or-knee-replacement-study-protocol-for-a-randomised-controlled-feasibility-trial
#12
Rory J M Morrison, Deborah Bunn, William K Gray, Paul N Baker, Craig White, Amar Rangan, Kenneth S Rankin, Mike R Reed
BACKGROUND: Vitamin D deficiency has been linked to poor outcomes after total hip replacement (THR) or total knee replacement (TKR), including lower patient-reported outcome measures (PROMs), peri-prosthetic infection and longer hospital stay. We present a randomised feasibility trial protocol designed to prospectively investigate the influence of vitamin D testing, and subsequent supplementation for deficiency, prior to THR/TKR. METHODS/DESIGN: One hundred adult patients undergoing primary THR/TKR for osteoarthritis at two NHS hospital trusts in North East England will be recruited...
November 2, 2017: Trials
https://www.readbyqxmd.com/read/29094039/host-directed-therapeutic-strategies-for-tuberculosis
#13
REVIEW
Afsal Kolloli, Selvakumar Subbian
Tuberculosis (TB), caused by Mycobacterium tuberculosis (Mtb), remains a leading cause of morbidity and mortality in humans worldwide. Currently, the standard treatment for TB involves multiple antibiotics administered for at least 6 months. Although multiple antibiotics therapy is necessary to prevent the development of drug resistance, the prolonged duration of treatment, combined with toxicity of drugs, contributes to patient non-compliance that can leads to the development of drug-resistant Mtb (MDR and XDR) strains...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29092993/the-effect-of-a-single-early-high-dose-vitamin-d-supplement-on-fracture-union-in-patients-with-hypovitaminosis-d-a-prospective-randomised-trial
#14
N Haines, L B Kempton, R B Seymour, M J Bosse, C Churchill, K Hand, J R Hsu, D Keil, J Kellam, N Rozario, S Sims, M A Karunakar
AIMS: To evaluate the effect of a single early high-dose vitamin D supplement on fracture union in patients with hypovitaminosis D and a long bone fracture. PATIENTS AND METHODS: Between July 2011 and August 2013, 113 adults with a long bone fracture were enrolled in a prospective randomised double-blind placebo-controlled trial. Their serum vitamin D levels were measured and a total of 100 patients were found to be vitamin D deficient (< 20 ng/ml) or insufficient (< 30 ng/mL)...
November 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/29084081/lasting-impact-of-clostridium-difficile-infection-in-inflammatory-bowel-disease-a-propensity-score-matched-analysis
#15
Alyce Anderson, Benjamin Click, Claudia Ramos-Rivers, Debbie Cheng, Dmitriy Babichenko, Ioannis E Koutroubakis, Jana G Hashash, Marc Schwartz, Jason Swoger, Arthur M Barrie, Michael A Dunn, Miguel Regueiro, David G Binion
BACKGROUND: Patients with inflammatory bowel disease are at an increased risk of Clostridium difficile infection (CDI), but the impact of CDI on disease severity is unclear. The aim of this study was to determine the effect of CDI on long-term disease outcome in a matched cohort of patients with inflammatory bowel disease. METHODS: Patients who tested positive for infection formed the CDI-positive group. We generated a 1:2 propensity matched case to control cohort based on risk factors for CDI in the year before infection...
December 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29080635/regulation-of-immune-function-by-vitamin-d-and-its-use-in-diseases-of-immunity
#16
REVIEW
An-Sofie Vanherwegen, Conny Gysemans, Chantal Mathieu
Evidence exists for a role for vitamin D and its active metabolites in modulating immune functions. In animal models, vitamin D deficiency is associated with a higher risk for autoimmunity in genetically predisposed subjects and increases in susceptibility to infections. In addition, high-dose vitamin D can improve immune health, prevent autoimmunity, and improve defense against infections. In humans, evidence exists on associations between vitamin D deficiency and impaired immune function, leading to autoimmunity in genetically predisposed people and increased risk for infections; data on therapeutic immune effects of vitamin D supplementation when vitamin D levels are already sufficient are lacking...
December 2017: Endocrinology and Metabolism Clinics of North America
https://www.readbyqxmd.com/read/29077711/prenatal-vitamin-d-supplementation-reduces-risk-of-asthma-recurrent-wheeze-in-early-childhood-a-combined-analysis-of-two-randomized-controlled-trials
#17
Helene M Wolsk, Bo L Chawes, Augusto A Litonjua, Bruce W Hollis, Johannes Waage, Jakob Stokholm, Klaus Bønnelykke, Hans Bisgaard, Scott T Weiss
BACKGROUND: We recently published two independent randomized controlled trials of vitamin D supplementation during pregnancy, both indicating a >20% reduced risk of asthma/recurrent wheeze in the offspring by 3 years of age. However, neither reached statistical significance. OBJECTIVE: To perform a combined analysis of the two trials and investigate whether maternal 25-hydroxy-vitamin D (25(OH)D) level at trial entry modified the intervention effect. METHODS: VDAART (N = 806) and COPSAC2010...
2017: PloS One
https://www.readbyqxmd.com/read/29072165/therapeutic-effect-of-vitamin-d-in-acute-lower-respiratory-infection-a-randomized-controlled-trial
#18
Sanjana H Somnath, Niranjan Biswal, Venkatesh Chandrasekaran, Barath Jagadisan, Zachhariah Bobby
OBJECTIVES: To study the effect of vitamin D supplementation on the outcome of acute lower respiratory infection in hospitalized children. STUDY DESIGN: This is an open label parallel group randomized trial. Total of 154 children aged 2 mo-5 yrs (mean age 13 mo) admitted with acute lower respiratory infection (ALRI) were randomized to receive standard care therapy alone or standard care therapy for the respiratory infection along with a single oral dose of 100,000 IU of vitamin D3...
August 2017: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/29071047/patterns-of-vitamin-d-parathyroid-hormone-and-c-terminal-telopeptide-of-collagen-type-1-in-caucasian-and-african-descent-hiv-infected-populations-in-central-europe
#19
Sebastian Noe, Celia Oldenbuettel, Silke Heldwein, Hans Jaeger, Eva Wolf
Risk factors for bone loss in HIV patients might differ or have a different impact in African descent compared to Caucasian populations. The aim of the paper is to analyze the relevance of risk factors on surrogate markers of bone metabolism in HIV-infected African descent and Caucasian patients. This is a cross-sectional study in a single HIV-specialized research and clinical care center in Munich, Germany. We included 889 patients in the study, among them 771 Caucasians (86.7%). Only in Caucasians lower vitamin D levels [OR: 2...
October 2, 2017: Infectious Disease Reports
https://www.readbyqxmd.com/read/29069246/hypercalcemia-in-children-three-cases-report-with-unusual-clinical-presentations
#20
Bruna Barros Garbim, Larissa D Ávila, Sumara Zuanazi Pinto Rigatto, Kélcia Rosana da Silva Quadros, Vera Maria Santoro Belangero, Rodrigo Bueno de Oliveira
Hypercalcemia is a rare condition in childhood; the most common causes are primary hyperparathyroidism, malignancy, prolonged immobilisation, thyrotoxicosis, thiazide diuretic, supplements containing calcium, milk-alkali syndrome, vitamin D intoxication, infections and idiopathic. We present three cases of severe hypercalcemia of unusual causes in children. The first patient had high fever, poor general condition, weight loss and myalgia. Extensive preliminary investigation did not define the etiology, but a review of medical history revealed prolonged contact with pet bird and a positive serology for Chlamydia confirmed the diagnosis of psittacosis...
April 2017: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
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