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Vitamin B1

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https://www.readbyqxmd.com/read/28808005/conformational-dynamics-of-1-deoxy-d-xylulose-5-phosphate-synthase-on-ligand-binding-revealed-by-h-d-exchange-ms
#1
Jieyu Zhou, Luying Yang, Alicia DeColli, Caren Freel Meyers, Natalia S Nemeria, Frank Jordan
The enzyme 1-deoxy-d-xylulose 5-phosphate synthase (DXPS) is a key enzyme in the methylerythritol 4-phosphate pathway and is a target for the development of antibiotics, herbicides, and antimalarial drugs. DXPS catalyzes the formation of 1-deoxy-d-xylulose 5-phosphate (DXP), a branch point metabolite in isoprenoid biosynthesis, and is also used in the biosynthesis of thiamin (vitamin B1) and pyridoxal (vitamin B6). Previously, we found that DXPS is unique among the superfamily of thiamin diphosphate (ThDP)-dependent enzymes in stabilizing the predecarboxylation intermediate, C2-alpha-lactyl-thiamin diphosphate (LThDP), which has subsequent decarboxylation that is triggered by d-glyceraldehyde 3-phosphate (GAP)...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28806727/formation-of-friable-embryogenic-callus-in-cassava-is-enhanced-under-conditions-of-reduced-nitrate-potassium-and-phosphate
#2
Yoshinori Utsumi, Chikako Utsumi, Maho Tanaka, Vu The Ha, Akihiro Matsui, Satoshi Takahashi, Motoaki Seki
Agrobacterium-mediated transformation is an important research tool for the genetic improvement of cassava. The induction of friable embryogenic callus (FEC) is considered as a key step in cassava transformation. In the present study, the media composition was optimized for enhancing the FEC induction, and the effect of the optimized medium on gene expression was evaluated. In relative comparison to MS medium, results demonstrated that using a medium with reducing nutrition (a 10-fold less concentration of nitrogen, potassium, and phosphate), the increased amount of vitamin B1 (10 mg/L) and the use of picrolam led to reprogram non-FEC to FEC...
2017: PloS One
https://www.readbyqxmd.com/read/28806113/-hungarian-diet-and-nutritional-status-survey-the-otap2014-study-v-vitamin-intake-of-the-hungarian-population
#3
Erzsébet Schreiberné Molnár, Zsuzsanna Nagy-Lőrincz, Barbara Nagy, Márta Bakacs, Orsolya Kis, Eszter Sarkadi Nagy, Éva Martos
INTRODUCTION AND AIM: The Hungarian Diet and Nutritional Status Survey was implemented on a sub-sample of the European Health Interview Survey. In this paper, the authors present the data on the vitamin intake of the Hungarian population. METHOD: The survey represents the vitamin intake of the Hungarian non-institutionalised adult population of 18 years and older. There are significant differences between men's and women's vitamin intake. RESULTS: The intake of all water-soluble vitamins except for vitamin C is higher in men than in women, and the difference between the genders regarding the intake of vitamin E and D is significant...
August 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28799782/effects-of-nutrient-and-bioactive-food-components-on-alzheimer-s-disease-and-epigenetic
#4
Elİf Celİk, Nevİn Sanlİer
Alzheimer's disease (AD) is the most common form of dementia in the elderly and is a chronic neurodegenerative disease that is becoming widespread. For this reason, in recent years factors affecting the development, progression and cognitive function of the AD have been emphasized. Nutrients and other bioactive nutrients are among the factors that are effective in AD. In particular, vitamins A, C and E, vitamins B1, B6 and B12, folate, magnesium, choline, inositol, anthocyanins, isoflavones etc. nutrients and bioactive nutrients are known to be effective in the development of AD...
August 11, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28763984/solvation-behavior-and-sweetness-response-of-carbohydrates-their-derivatives-and-sugar-alcohols-in-thiamine-hcl-vitamin-b1-and-pyridoxine-hcl-vitamin-b6-at-different-temperatures
#5
Parampaul K Banipal, Mousmee Sharma, Tarlok S Banipal
Volumetric properties are important tools to study the solvation behavior of solutes and reveal valuable information about solute-solute/cosolute interactions. Therefore, standard partial molar volumes at infinite dilution have been calculated from density measurements for monosaccharides, their methoxy and deoxy derivatives, disaccharides and sugar alcohols in (0.05, 0.15, 0.25 and 0.35)molkg(-1) thiamine HCl(aq) and pyridoxine HCl(aq) solutions over temperature range (288.15-318.15)K at pressure, p=0.1MPa...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28718091/nutritional-and-micronutrient-care-of-bariatric-surgery-patients-current-evidence-update
#6
REVIEW
Michael A Via, Jeffrey I Mechanick
PURPOSE OF REVIEW: The continued success of bariatric surgery to treat obesity and obesity-associated metabolic conditions creates a need for a strong understanding of clinical nutrition both before and after these procedures. RECENT FINDINGS: Surgically induced alteration of gastrointestinal physiology can affect the nutrition of individuals, especially among those who have undergone malabsorptive procedures. While uncommon, a subset of patients may develop protein-calorie malnutrition...
July 17, 2017: Current Obesity Reports
https://www.readbyqxmd.com/read/28710938/lack-of-effects-of-a-sobering-product-eezup-on-the-blood-ethanol-and-congener-alcohol-concentration
#7
Cora Wunder, Sarah Hain, Sarah C Koelzer, Alexander Paulke, Marcel A Verhoff, Stefan W Toennes
INTRODUCTION: The lifestyle product 'Eezup!' appeared on the German market and promised to normalize energy metabolism. Among vitamins (B1, B2, B6, C, E and zinc), rice protein and fructose the addition of alcohol dehydrogenase and catalase enzymes is a novel approach. The product was advertised as capable of boosting the rate of alcohol elimination. METHODS: Seventeen subjects (11 men, 6 women, 19-58 years old), participated in a two-way crossover drinking study...
June 28, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28698862/antimutagenic-and-antioxidant-activities-of-thai-rice-brans
#8
Orapin Insuan, Arpamas Chariyakornkul, Yuwada Rungrote, Rawiwan Wongpoomchai
BACKGROUND: Rice bran is the outer layer of the rice grain, and contains high amounts of bioactive phytochemicals. Here, we investigated and compared chemopreventive properties of purple and white rice bran extracts. METHODS: Rice bran was extracted with dichloromethane and methanol. Chemical constituents in the extracts were analyzed by colorimetric assay and high performance liquid chromatography. The mutagenicity and antimutagenicity of the extracts were determined via the Salmonella mutation assay...
June 2017: Journal of Cancer Prevention
https://www.readbyqxmd.com/read/28680171/thiamine-prescribing-practices-for-adult-patients-admitted-to-an-internal-medicine-service
#9
Uzma Alim, Duane Bates, Ashten Langevin, Denise Werry, Deonne Dersch-Mills, Robert J Herman, Marcy Mintz, Sunita Ghosh
BACKGROUND: Thiamine (vitamin B1) is an essential cofactor responsible for the breakdown of glucose, and its deficiency is associated with Wernicke encephalopathy (WE). There is a lack of evidence from systematic studies on the optimal dosing of thiamine for WE. Objectives: The primary objective was to describe the prescribing patterns for IV thiamine in adult patients admitted to a large teaching hospital. The secondary objective was to evaluate the clinical resolution of WE symptoms (confusion, ataxia, and/or ocular motor abnormalities) in relation to the dose of IV thiamine prescribed...
May 2017: Canadian Journal of Hospital Pharmacy
https://www.readbyqxmd.com/read/28670139/younger-age-is-an-independent-predictor-of-worse-prognosis-among-lebanese-nonmetastatic-breast-cancer-patients-analysis-of-a-prospective-cohort
#10
Alissar El Chediak, Raafat S Alameddine, Ayman Hakim, Lara Hilal, Sarah Abdel Massih, Lana Hamieh, Deborah Mukherji, Sally Temraz, Maya Charafeddine, Ali Shamseddine
BACKGROUND: Several retrospective studies have reported that younger age at presentation is associated with a worse prognosis for nonmetastatic breast cancer patients. In this study, we prospectively assessed the association between different baseline characteristics (age, tumor characteristics, mode of treatment, etc) and outcomes among newly diagnosed nonmetastatic Lebanese breast cancer patients. METHODS: We recruited a sample of 123 women newly diagnosed with nonmetastatic breast cancer presenting to American University of Beirut Medical Center...
2017: Breast Cancer: Targets and Therapy
https://www.readbyqxmd.com/read/28659447/unravelling-the-relationship-between-the-tsetse-fly-and-its-obligate-symbiont-wigglesworthia-transcriptomic-and-metabolomic-landscapes-reveal-highly-integrated-physiological-networks
#11
XiaoLi Bing, Geoffrey M Attardo, Aurelien Vigneron, Emre Aksoy, Francesca Scolari, Anna Malacrida, Brian L Weiss, Serap Aksoy
Insects with restricted diets rely on obligate microbes to fulfil nutritional requirements essential for biological function. Tsetse flies, vectors of African trypanosome parasites, feed exclusively on vertebrate blood and harbour the obligate endosymbiont Wigglesworthia glossinidia. Without Wigglesworthia, tsetse are unable to reproduce. These symbionts are sheltered within specialized cells (bacteriocytes) that form the midgut-associated bacteriome organ. To decipher the core functions of this symbiosis essential for tsetse's survival, we performed dual-RNA-seq analysis of the bacteriome, coupled with metabolomic analysis of bacteriome and haemolymph collected from normal and symbiont-cured (sterile) females...
June 28, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28653943/a-patient-with-a-typical-presentation-of-wernicke-encephalopathy-was-found-to-have-sporadic-creutzfeldt-jakob-disease
#12
K Goossens, R L van Bruchem-Visser
Creutzfeldt-Jakob disease (CJD) has a significant degree of clinical heterogeneity that is especially found in the features at onset. Here we present a patient with the sporadic form of CJD mimicking Wernicke encephalopathy. We first treated him with a high dose of thiamine; however, the vitamin B1 levels proved to be normal, which ruled out Wernicke encephalopathy. Meanwhile, his clinical condition progressively worsened and he developed a rapidly progressive cognitive disorder, mutism and myoclonus of the muscles...
June 2017: Netherlands Journal of Medicine
https://www.readbyqxmd.com/read/28652005/recent-trends-in-determination-of-thiamine-and-its-derivatives-in-clinical-practice
#13
REVIEW
Jaroslav Jenčo, Lenka Kujovská Krčmová, Dagmar Solichová, Petr Solich
Over the last five decades, many methods to analyze thiamine (vitamin B1) and its phosphorylated forms in urine, whole blood, serum, plasma and erythrocytes have been proposed. Some of the methods are presently used in routine practice, but analytical problems regarding reproducibility, standardization, lack of automation, time consuming procedures for pretreatment and analysis are often discussed. With modern approaches to bioanalysis in clinical research of vitamins, whole processes can be automated, making analysis less time consuming, with reduced consumption of solvents and samples...
August 11, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28649995/cytokines-in-systemic-lupus-erythematosus-far-beyond-th1-th2-dualism
#14
Poliana Macedo Guimarães, Bruna Miglioranza Scavuzzi, Nicole Perugini Stadtlober, Lorena Flor da Rosa Santos Silva, Marcell Alysson Batisti Lozovoy, Tathiana Mayumi Veiga Iriyoda, Neide Tomimura Costa, Edna Maria Vissoci Reiche, Michael Maes, Isaias Dichi, Andréa Name Colado Simão
The aims of this study were to delineate cytokines profiles of systemic lupus erythematosus (SLE), construct prediction models for diagnosis and disease activity using those profiles, and to examine the associations between TNFB Ncol polymorphism, body mass index (BMI), and vitamin D levels with cytokine levels. 200 SLE patients and 196 healthy controls participated in this case-control study. Plasma cytokines levels of TNF-α, IFN-γ, IL-1β, IL- 4, IL-6, IL-10, IL-12, IL-17 were measured and cytokines profiles were computed...
June 26, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28649639/initial-assessment-of-the-nutritional-quality-of-the-space-food-system-over-three-years-of-ambient-storage
#15
Maya Cooper, Michele Perchonok, Grace L Douglas
Processed and prepackaged space food is the main source of nutrition for crew aboard the International Space Station, and likely will continue to be the main source of nutrition for future exploration missions. However, very little information is available on the nutritional stability of space foods. To better understand their nutritional stability, 24 micronutrients were measured in 109 space foods stored over 3 years at room temperature. Our analysis indicated that potassium, calcium, vitamin D, and vitamin K concentrations in the food may not be adequate to meet the recommended daily intake requirements even before storage...
2017: NPJ Microgravity
https://www.readbyqxmd.com/read/28604131/micronutrient-intake-and-the-contribution-of-dietary-supplements-in-hispanic-infants
#16
Kiara Amaro-Rivera, Andrea López-Cepero, Beatriz Diaz, Jae Eun Lee, Cristina Palacios
To calculate micronutrient adequacy among infants and toddlers and to determine the contribution of dietary supplements to this adequacy, micronutrient intake was assessed using two nonconsecutive 24-hour recalls in a sample of 296 infants aged 0-24 months. Micronutrient intake was calculated from foods and beverages and from supplements and compared between nonusers and users of supplements. Percentages of children below the Dietary Reference Intake (DRI) and above the tolerable upper limit intake (UL) were also compared between groups...
June 12, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28587059/selected-risk-nutritional-factors-for-chemotherapy-induced-polyneuropathy
#17
Jiri Grim, Alena Ticha, Radomir Hyspler, Martin Valis, Zdenek Zadak
The present study seeks to identify the nutritional risk factors involved in the development of neuropathies induced by chemotherapeutic treatments. Unlike the gastrointestinal or hematological adverse effects of chemotherapy there is no protective treatment strategy for polyneuropathy. The aim of this study was to find possible deficiencies in nutritional factors, which can be used for supplementation in the future for prevention of chemotherapy-induced neuropathy development. We analyzed 70 patients undergoing paclitaxel chemotherapy and evaluated the risk factors involved in chemotherapy-induced peripheral neuropathy (CIPN)...
May 25, 2017: Nutrients
https://www.readbyqxmd.com/read/28576291/a-pilot-study-into-a-possible-relationship-between-diet-and-stuttering
#18
Jean Hum, Toni Rietveld, Piet Wiedijk, Pascal van Lieshout
PURPOSE: There are theoretical and empirical reasons to consider a potential role for copper metabolism in the brain in how it could influence stuttering. However, a link between stuttering and dietary intake has never been researched in a systematic way. This pilot study therefore aimed to explore a possible association between ingested amounts of copper and thiamine (vitamin B1) with stuttering frequency using a double blind cross-over longitudinal paradigm. METHODS: 19 adults who stutter between 20 and 51 years old filled out an online survey for 9 consecutive weeks...
June 2017: Journal of Fluency Disorders
https://www.readbyqxmd.com/read/28572888/association-between-the-eating-family-meal-and-the-prevalence-of-metabolic-syndrome-using-data-from-korea-national-health-and-nutrition-examination-survey-2007-2012
#19
Shin-Ae Park, Woo-Chul Park, Yu-Jin Kwon, Jae-Yong Shim
BACKGROUND: Several studies have shown that family meals promote a well-balanced and healthier diet and weight status. Metabolic syndrome is related to eating behavior. This study investigated the association between eating family meals and the prevalence of metabolic syndrome. METHODS: This cross-sectional study included 4,529 subjects who participated in the Korea National Health and Nutrition Examination Survey IV and V (2007-2012). A self-reported questionnaire was used to assess dietary status...
May 2017: Korean Journal of Family Medicine
https://www.readbyqxmd.com/read/28565892/metabolic-surgery-and-nutritional-deficiencies
#20
Christine Stroh, Thomas Manger, Frank Benedix
The increasing prevalence of morbid obesity in Germany is associated with an increasing number of metabolic surgical interventions. Short-term surgical and long-term metabolic complications such as nutrient deficiencies can be considered as the main risks of metabolic surgery with its malabsorptive but also restrictive procedures. The aim of this review was to characterize the most relevant metabolic complications specific for the various bariatric procedures, which, subsequently, require a permanent surveillance and supplementation, respectively...
October 2017: Minerva Chirurgica
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