The molecular mechanisms governing orderly shutdown and retraction of CD4+ type 1 helper T (TH1) cell responses remain poorly understood. Here we show that complement triggers contraction of TH1 responses by inducing intrinsic expression of the vitamin D (VitD) receptor and the VitD-activating enzyme CYP27B1, permitting T cells to both activate and respond to VitD.… Continue reading Autocrine vitamin #D signaling switches off pro-inflammatory programs of TH1 cells
Tag: Vitamin D
Vitamin D and Marine n-3 Fatty Acid Supplementation and Prevention of Autoimmune Disease in the VITAL Randomized Controlled Trial
In observational studies, vitamin D has been inconsistently associated with reduced risk of several autoimmune diseases, and a large randomized, controlled trial has been lacking. Dietary marine-derived long-chain omega-3 (n−3) fatty acids decrease systemic inflammation and ameliorate symptoms in some autoimmune diseases, but no trials have tested whether supplementation lowers risk of developing autoimmune disease.… Continue reading Vitamin D and Marine n-3 Fatty Acid Supplementation and Prevention of Autoimmune Disease in the VITAL Randomized Controlled Trial
Estimating dose-response relationships for vitamin #D with #coronary heart disease, #stroke, and all-cause mortality: observational and Mendelian randomisation analyses
SummaryBackgroundRandomised trials of vitamin D supplementation for cardiovascular disease and all-cause mortality have generally reported null findings. However, generalisability of results to individuals with low vitamin D status is unclear. We aimed to characterise dose-response relationships between 25-hydroxyvitamin D (25[OH]D) concentrations and risk of coronary heart disease, stroke, and all-cause mortality in observational and Mendelian… Continue reading Estimating dose-response relationships for vitamin #D with #coronary heart disease, #stroke, and all-cause mortality: observational and Mendelian randomisation analyses
#Zinc, Vitamin D and Vitamin C: Perspectives for #COVID-19 With a Focus on Physical Tissue Barrier Integrity
Some nutrients play key roles in maintaining the integrity and function of the immune system, presenting synergistic actions in steps determinant for the immune response. Among these elements, zinc and vitamins C and D stand out for having immunomodulatory functions and for playing roles in preserving physical tissue barriers. Considering the COVID-19 pandemic, nutrients that… Continue reading #Zinc, Vitamin D and Vitamin C: Perspectives for #COVID-19 With a Focus on Physical Tissue Barrier Integrity
Vitamin #D supplementation reduces the risk of #fall in the vitamin D deficient elderly: an updated systematic review and meta-analysis
Vitamin D supplementation has been widely recommended to prevent falls. However, considerable controversy exists regarding the association of such supplementation and fall risk. Previous meta-analyses yielded inconsistent results because of differences in the baseline of 25-hydroxyvitamin D (25[OH]D) and dose of vitamin D and use of vitamin D or in combination with calcium in different… Continue reading Vitamin #D supplementation reduces the risk of #fall in the vitamin D deficient elderly: an updated systematic review and meta-analysis
#Calcifediol treatment and #COVID-19-related outcomes
COVID-19 is a major health problem because of saturation of intensive care units (ICU) and mortality. Vitamin D has emerged as a potential treatment able to reduce the disease severity. ObjectiveTo elucidate the effect of calcifediol [25OHD3] treatment on COVID-19-related outcomes. DesignObservational cohort study from March to May, 2020. SettingPatients admitted to COVID-19 wards of… Continue reading #Calcifediol treatment and #COVID-19-related outcomes
Development and validation of a risk prediction model for high-risk #adenomas at the time of first screening #colonoscopy among screening aged Canadians
The aim of this study was to develop a risk prediction model for HRAs detected at screening colonoscopy based on readily available participant information. The cohort consisted of 3035 participants aged 50 to 74 years with no history of cancer who underwent a primary screening colonoscopy at a centralized colon cancer screening centre between 2008 and… Continue reading Development and validation of a risk prediction model for high-risk #adenomas at the time of first screening #colonoscopy among screening aged Canadians
Vitamin #D supplementation to prevent acute respiratory #infections: a systematic review and meta-analysis of aggregate data from randomised controlled trials
A 2017 meta-analysis of data from 25 randomised controlled trials (RCTs) of vitamin D supplementation for the prevention of acute respiratory infections (ARIs) revealed a protective effect of this intervention. We aimed to examine the link between vitamin D supplementation and prevention of ARIs in an updated meta-analysis. Methods For this systematic review and meta-analysis,… Continue reading Vitamin #D supplementation to prevent acute respiratory #infections: a systematic review and meta-analysis of aggregate data from randomised controlled trials
Effect of Early High-Dose Vitamin #D3 Repletion on Cognitive Outcomes in Critically Ill Adults
Long-term cognitive impairment frequently occurs after critical illness; no treatments are known to improve long-term cognition. Research Question Does a single high-dose (540,000 IU) enteral treatment of vitamin D3 given shortly after hospital admission in vitamin D deficient, critically-ill patients improve long-term global cognition or executive function? Study Design and Methods This study evaluated long-term… Continue reading Effect of Early High-Dose Vitamin #D3 Repletion on Cognitive Outcomes in Critically Ill Adults
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