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B-vitamins

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https://www.readbyqxmd.com/read/28424186/circulating-concentrations-of-biomarkers-and-metabolites-related-to-vitamin-status-one-carbon-and-the-kynurenine-pathways-in-us-nordic-asian-and-australian-populations
#1
Øivind Midttun, Despoina Theofylaktopoulou, Adrian McCann, Anouar Fanidi, David C Muller, Klaus Meyer, Arve Ulvik, Wei Zheng, Xiao-Ou Shu, Yong-Bing Xiang, Ross Prentice, Cynthia A Thomson, Mary Pettinger, Graham G Giles, Allison Hodge, Qiuyin Cai, William J Blot, Jie Wu, Mikael Johansson, Johan Hultdin, Kjell Grankvist, Victoria L Stevens, Marjorie L McCullough, Stephanie J Weinstein, Demetrius Albanes, Arnulf Langhammer, Kristian Hveem, Marit Næss, Howard D Sesso, J Michael Gaziano, Julie E Buring, I-Min Lee, Gianluca Severi, Xuehong Zhang, Jiali Han, Meir J Stampfer, Stephanie A Smith-Warner, Anne Zeleniuch-Jacquotte, Loic le Marchand, Jian-Min Yuan, Lesley M Butler, Woon-Puay Koh, Renwei Wang, Yu-Tang Gao, Ulrika Ericson, Emily Sonestedt, Regina G Ziegler, Neal D Freedman, Kala Visvanathan, Miranda R Jones, Caroline Relton, Paul Brennan, Mattias Johansson, Per M Ueland
Background: Circulating concentrations of biomarkers that are related to vitamin status vary by factors such as diet, fortification, and supplement use. Published biomarker concentrations have also been influenced by the variation across laboratories, which complicates a comparison of results from different studies.Objective: We robustly and comprehensively assessed differences in biomarkers that are related to vitamin status across geographic regions.Design: The trial was a cross-sectional study in which we investigated 38 biomarkers that are related to vitamin status and one-carbon and tryptophan metabolism in serum and plasma from 5314 healthy control subjects representing 20 cohorts recruited from the United States, Nordic countries, Asia, and Australia, participating in the Lung Cancer Cohort Consortium...
April 19, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28419609/band-aids-for-buchnera-and-b-vitamins-for-all
#2
Jacob A Russell, Kerry M Oliver, Allison K Hansen
Evolution lacks foresight, and hence, key adaptations may produce major challenges over the long run. The natural world is rife with examples of long-term 'side effects' associated with quick-fix tinkering, including blind spots in vertebrate eyes. An important question is how nature compensates for imperfections once evolution has set a course. The symbioses associated with sap-feeding insects present a fascinating opportunity to address this issue. On one hand, the substantial diversity and biomass of sap-feeding insects are largely due to ancient acquisitions of nutrient-provisioning bacterial symbionts...
April 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28419279/primates-lice-and-bacteria-speciation-and-genome-evolution-in-the-symbionts-of-hominid-lice
#3
Bret M Boyd, Julie M Allen, Nam-Phuong Nguyen, Pranjal Vachaspati, Zach Quicksall, Tandy Warnow, Lawrence Mugisha, Kevin P Johnson, David L Reed
Insects with restricted diets rely on symbiotic bacteria to provide essential metabolites missing in their diet. The blood-sucking lice are obligate, host-specific parasites of mammals and are themselves host to symbiotic bacteria. In human lice, these bacterial symbionts supply the lice with B-vitamins. Here we sequenced the genomes of symbiotic and heritable bacterial of human, chimpanzee, gorilla, and monkey lice and used phylogenomics to investigate their evolutionary relationships. We find that these symbionts have a phylogenetic history reflecting the louse phylogeny, a finding contrary to previous reports of symbiont replacement...
April 14, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28415531/new-synthesis-of-poly-ortho-methoxyaniline-nanostructures-and-its-application-to-construct-modified-multi-wall-carbon-nanotube-graphite-paste-electrode-for-simultaneous-determination-of-uric-acid-and-folic-acid
#4
Hossein Rajabi, Meissam Noroozifar
Uric acid (UA) and folic acid (FA) are compounds of biomedical interest. In humans, about 70% of daily uric acid disposal occurs via the kidneys, and in 5-25% of humans, impaired renal (kidney) excretion leads to hyperuricemia. Folate is another form folic acid of which is known as, is one of the B vitamins. It is used as a supplement by women to prevent neural tube defects developing during pregnancy. Polyortho-methoxyaniline nanostructures (POMANS) was synthesized with a new two phase (organic-water) synthesis method...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28406526/changes-in-the-nutritional-quality-of-five-mangifera-species-harvested-in-two-maturity-stages
#5
Ignacio Barbosa Gámez, Karla P Caballero Montoya, Noris Ledesma, Sonia G Sáyago Ayerdi, María de Lourdes Gacía-Magaña, Eric J von Wettberg, Efigenia Montalvo-González
BACKGROUND: There are 69 species of edible Mangifera recognized in Southeast Asia. Most of these species have not been characterized for nutritional properties. Here we describe the nutritional quality of the pulp of several Mangifera species: Mangifera casturi, Mangifera lalijiwa, Mangifera odorata, Mangifera zeylanica and two cultivars of Mangifera indica 'Tommy-Kent' and 'Tommy Atkins' at two maturity stages. RESULTS: The results show that nutritional quality varied with the maturity stage and among the species...
April 13, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28403590/efficacy-of-pollen-extract-in-association-with-group-b-vitamins-for-pain-relief-in-chronic-prostatitis-chronic-pelvic-pain-syndrome-a-survey-of-urologists-knowledge-about-its-clinical-application
#6
Giacomo Maria Pirola, Stefano Puliatti, Tommaso Bocchialini, Eugenio Martorana, Salvatore Micali, Giampaolo Bianchi
INTRODUCTION AND AIM OF THE STUDY: Chronic prostatitis/chronic pelvic pain syndrome (CP/CPSS) is a pathology of high prevalence in Italian male population, difficult to diagnose and to treat and with poor response to conventional therapy. Aim of this study was to review the evidence of the literature about the therapeutic effects of a plant product containing flower pollen extracts and group B vitamins on symptoms resolution and amelioration of CP/CPPS patients' quality of life and to investigate the knowledge among practicing urologists about the clinical application of this product...
March 31, 2017: Archivio Italiano di Urologia, Andrologia
https://www.readbyqxmd.com/read/28396437/correction-for-zhong-et-al-b-vitamins-attenuate-the-epigenetic-effects-of-ambient-fine-particles-in-a-pilot-human-intervention-trial
#7
(no author information available yet)
No abstract text is available yet for this article.
April 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28396257/b-vitamin-and-choline-supplementation-increases-neuroplasticity-and-recovery-after-stroke
#8
Nafisa M Jadavji, Joshua T Emmerson, Amanda J MacFarlane, William G Willmore, Patrice D Smith
Folates are B-vitamins that play an important role in brain function. Dietary and genetic deficiencies in folate metabolism result in elevated levels of homocysteine which have been linked to increased risk of developing a stroke. Reducing levels of homocysteine before or after a stroke through B-vitamin supplementation has been a focus of many clinical studies, however, the results remain inconsistent. Animal model systems provide a powerful mechanism to study and understand functional impact and mechanisms through which supplementation affects stroke recovery...
April 7, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28383037/five-lipoxygenase-hypomethylation-mediates-the-homocysteine-effect-on-alzheimer-s-phenotype
#9
Jian-Guo Li, Carlos Barrero, Salim Merali, Domenico Praticò
Environmental and genetic risk factors are implicated in the pathogenesis of Alzheimer's disease (AD). However, how they interact and influence its pathogenesis remains to be investigated. High level of homocysteine (Hcy) is an AD risk factor and associates with an up-regulation of the ALOX5 gene. In the current paper we investigated whether this activation is responsible for the Hcy effect on the AD phenotype and the mechanisms involved. Triple transgenic mice were randomized to receive regular chow diet, a diet deficient in folate and B vitamins (Diet), which results in high Hcy, or the Diet plus zileuton, a specific ALOX5 inhibitor, for 7 months...
April 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28381531/ratios-of-one-carbon-metabolites-are-functional-markers-of-b-vitamin-status-in-a-norwegian-coronary-angiography-screening-cohort
#10
Arve Ulvik, Steinar Hustad, Adrian McCann, Øivind Midttun, Ottar K Nygård, Per M Ueland
Background: Functional (metabolic) markers of B-vitamin status, including plasma total homocysteine (tHcy) for folate and plasma methylmalonic acid (MMA) for vitamin B-12, suffer from moderate sensitivity and poor specificity. Ratios of metabolites belonging to the same pathway may have better performance characteristics.Objective: We evaluated the ratios of tHcy to total cysteine (tCys; Hcy:Cys), tHcy to creatinine (Hcy:Cre), and tHcy to tCys to creatinine (Hcy:Cys:Cre) as functional markers of B-vitamin status represented by a summary score composed of folate, cobalamin, betaine, pyridoxal 5'-phosphate (PLP), and riboflavin concentrations measured in plasma...
April 5, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28381340/high-folate-and-low-vitamin-b12-status-during-pregnancy-is-associated-with-gestational-diabetes-mellitus
#11
Jun S Lai, Wei Wei Pang, Shirong Cai, Yung Seng Lee, Jerry K Y Chan, Lynette P C Shek, Fabian K P Yap, Kok Hian Tan, Keith M Godfrey, Rob M van Dam, Yap Seng Chong, Mary F F Chong
BACKGROUND & AIMS: B-vitamins and homocysteine may contribute to the development of gestational diabetes mellitus (GDM), but existing studies are inconsistent. We examined the cross-sectional associations of plasma folate, vitamins B6, B12, and homocysteine concentrations with GDM and glycemia in a sample of multi-ethnic Asian pregnant women. METHODS: Plasma concentrations of folate, vitamins B6, B12, homocysteine and glucose were measured at 26-weeks' gestation in 913 pregnant women...
March 24, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28379583/b-vitamins-potentiate-acute-morphine-antinociception-and-attenuate-the-development-of-tolerance-to-chronic-morphine-in-mice
#12
Xue-Ting Deng, Yuan Han, Wen-Tao Liu, Xue-Jun Song
Objectives. : Opiate analgesics are the most effective treatments for severe pain, but their clinical utility is often hampered by the development of analgesic tolerance. There are striking similarities between morphine actions and neuropathic pain. We have demonstrated that B vitamins can attenuate neuropathic pain after peripheral nerve injury, sensory neuron inflammation/compression, and transient spinal cord ischemia. Given this similarity, the present study investigated whether B vitamins might be able to modify the antinociceptive effect of morphine as well as morphine tolerance in mice...
March 31, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28376309/dietary-modulation-of-cortical-excitation-and-inhibition
#13
Anika K Smith, Alex R Wade, Kirsty Eh Penkman, Daniel H Baker
The balance of excitatory and inhibitory neurotransmitters in the brain affects both neural responses and behaviour in humans and animals. Here we investigated whether dietary intervention aimed at increasing levels of the inhibitory neurotransmitter gamma-aminobutyric acid (GABA) can influence neural responses to basic sensory stimuli. Using a steady-state electroencephalography (EEG) paradigm, we found that the neural response to visual patterns was reduced in individuals who consumed a yeast extract product rich in substances associated with the production of GABA (glutamate and B vitamins), but not in a control group who consumed a placebo substance ( n = 14 per group)...
March 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28374905/mtor-folate-sensing-links-folate-availability-to-trophoblast-cell-function
#14
Fredrick J Rosario, Theresa L Powell, Thomas Jansson
Folate is a water-soluble B vitamin that is essential for cellular methylation reactions and DNA synthesis and repair. Low maternal folate levels in pregnancy are associated with fetal growth restriction, however the underlying mechanisms are poorly understood. Mechanistic target of rapamycin (mTOR) links nutrient availability to cell growth and function by regulating gene expression and protein translation. Here we show that mTOR functions as a folate sensor in primary human trophoblast (PHT) cells. Folate deficiency in PHT cells caused inhibition of mTOR signalling and decreased the activity of key amino acid transporters...
April 4, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28367952/b-vitamin-supplementation-mitigates-effects-of-fine-particles-on-cardiac-autonomic-dysfunction-and-inflammation-a-pilot-human-intervention-trial
#15
Jia Zhong, Letizia Trevisi, Bruce Urch, Xinyi Lin, Mary Speck, Brent A Coull, Gary Liss, Aaron Thompson, Shaowei Wu, Ander Wilson, Petros Koutrakis, Frances Silverman, Diane R Gold, Andrea A Baccarelli
Ambient fine particle (PM2.5) pollution triggers acute cardiovascular events. Individual-level preventions are proposed to complement regulation in reducing the global burden of PM2.5-induced cardiovascular diseases. We determine whether B vitamin supplementation mitigates PM2.5 effects on cardiac autonomic dysfunction and inflammation in a single-blind placebo-controlled crossover pilot trial. Ten healthy adults received two-hour controlled-exposure-experiment to sham under placebo, PM2.5 (250 μg/m(3)) under placebo, and PM2...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28361624/nutritional-standards-needed-for-ready-meals-to-avoid-micronutrient-deficiencies
#16
(no author information available yet)
Micronutrient deficiencies contribute to many age-related disorders, although initial effects may be mild and easily missed. For example, B vitamin deficiency may result in mild cognitive decline, thiamine deficiency can contribute to development of type 2 diabetes and lack of vitamin D changes immune function.
March 31, 2017: Nursing Older People
https://www.readbyqxmd.com/read/28348026/cooperative-metabolism-in-a-three-partner-insect-bacterial-symbiosis-revealed-by-metabolic-modeling
#17
Nana Y D Ankrah, Junbo Luan, Angela E Douglas
An important factor determining the impact of microbial symbionts on their animal host is the balance between the cost of nutrients consumed by the symbionts and benefit of nutrients released back to the host, but the quantitative significance of nutrient exchange in symbioses involving multiple microbial partners has rarely been addressed. In this study on the association between two intracellular bacterial symbionts, Portiera aleyrodidarum and Hamiltonella defensa, and their animal host, the whitefly Bemisia tabaci, we apply metabolic modeling to investigate host-symbiont nutrient exchange...
March 27, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28346362/nutrition-assessment-of-b-vitamins-in-highly-active-and-sedentary-women
#18
Kathleen Woolf, Nicole L Hahn, Megan M Christensen, Amanda Carlson-Phillips, Christine M Hansen
BACKGROUND: Female athletes and active women require adequate nutrition for optimal health and performance. Nutrition assessments are needed to identify potential nutrients of concern. Folate, vitamin B6, and vitamin B12 function in important pathways used during physical activity and female athletes may be at risk for poor status of these micronutrients. This cross-sectional study described a comprehensive nutrition assessment of the B-vitamins (folate, vitamin B6, and vitamin B12) using both dietary (food and dietary supplements) and biochemical assessments among highly active and sedentary women...
March 26, 2017: Nutrients
https://www.readbyqxmd.com/read/28339160/biofortification-of-riboflavin-and-folate-in-idli-batter-based-on-fermented-cereal-and-pulse-by-lactococcus-lactis-n8-and-saccharomyces-boulardii-saa655-in-idli-batter
#19
Suresh Chander C R, Bhawani Chamlagain, Susanna Kariluoto, Vieno Piironen, Per E J Saris
AIMS: Lactococcus lactis N8 and Saccharomyces boulardii SAA655 were investigated for their ability to synthesize B- vitamins (riboflavin and folate) and their functional role as microbial starters in idli fermentation. METHODS AND RESULTS: In this study, ultra-high performance liquid chromatography (UHPLC) and microbiological assay were used to determine the total riboflavin and folate content, respectively. Increased levels of folate were evident in both L. lactis N8 and S...
March 24, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28327992/cyst-fluid-from-cystic-malignant-brain-tumors-a-reservoir-of-nutrients-including-growth-factor-like-nutrients-for-tumor-cells
#20
Daniel Dahlberg, Eduard A Struys, Erwin E Jansen, Lars Mørkrid, Øivind Midttun, Bjørnar Hassel
BACKGROUND: Brain tumors may have cysts, whose content of nutrients could influence tumor cell microenvironment and growth. OBJECTIVE: To measure nutrients in cyst fluid from glioblastoma multiforme (GBM) and metastatic brain tumors. METHODS: Quantification of nutrients in cyst fluid from 12 to 18 GBMs and 4 to 10 metastatic brain tumors. RESULTS: GBM cysts contained glucose at 2.2 mmol/L (median value; range <0.8-3...
January 25, 2017: Neurosurgery
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