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5-methyltetrahydrofolate

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https://www.readbyqxmd.com/read/29243819/novel-dietary-supplement-associationreduces-symptoms-in-endometriosis-patients
#1
Pietro Giulio Signorile, Rosa Viceconte, Alfonso Baldi
Endometriosis is characterized by disabling symptoms that afflict young women with severe physical discomfort, difficulty in relationship life, and infertility; however, the currently available therapeutic strategies are unsatisfactory. Goal of this research was to identify a new combination of natural active ingredients that, administered as dietary supplements, could have the effect of reducing inflammatory response in endometriosis patients, decreasing the symptoms the disease produces and its harmful effects on affected organs...
December 15, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29090559/-liver-metabonomics-of-acute-gouty-arthritis-treated-by-diosocorea-nipponica
#2
Shu-Min Liu, Ning Zhang, Dong-Hua Yu, Yu Wang, Qi Zhou, Fang Lu
To explore the prevention and protection effect of Diosocorea nipponica (DNM)) on acute gouty arthritis (AGA) rats based on liver metabonomics, and find potential biomarkers and related pathways. AGA model rats were induced by monosodium urate crystal suspension. UPLC-TOF-MS coupled with pattern recognition technique was employed to find out the potential biomarkers and related metabolic pathways. Eleven common potential biomarkers were identified. Among the potential intervention targets in normal rats given by DNM, 4 biomarkers were up-regulated, and the other 4 targets were down regulated...
May 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29058482/identification-and-determination-of-naturally-occurring-folates-in-grains-of-rice-oryza-sativa-l-by-uplc-ms-ms-analysis
#3
Kaliyaperumal Ashokkumar, Paramasivam Sivakumar, Muthukrishnan Saradhadevi
The genetic potential and biofortification of India-grown rice with bioavailable folate has not been studied yet. The objectives of this study were to determine the folates concentration in four cultivars of rice through UPLC-MS/MS. Total folate concentration in rice cultivars ranged from 11.0 to 51 μg/100 g with a mean of 26.0 μg/100 g. Among the four rice cultivars, the pigmented grain cultivar Nootripathu possesses two-fold rich sources of total folates than the other three non-pigmented grain cultivars...
October 23, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28991880/folic-acid-impairs-the-uptake-of-5-methyltetrahydrofolate-in-human-umbilical-vascular-endothelial-cells
#4
Desiree Smith, Jacqueline Hornstra, Monica Rocha, Gerrit Jansen, Yehuda Assaraf, Inbal Lasry, Henk Blom, Yvo M Smulders
BACKGROUND: Adequate folate status supports endothelial structure and function. Folic acid (FA), an oxidized synthetic folate, which is present in the plasma of patients consuming fortified food or FA supplements, may impair cellular uptake of physiological, reduced folates. We studied the effect of FA on uptake of the dominant circulatory folate, 5-methyltetrahydrofolate (5MTHF) in endothelial cells. METHODS AND RESULTS: For short-term effects of FA, primary human umbilical vein endothelial cells (HUVECs) were maintained in growth medium containing 200 nM 5MTHF and preincubated with 20 nM FA 10 minutes before the 5MTHF uptake assessment...
October 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28984387/gene-expression-differences-in-the-methionine-remethylation-and-transsulphuration-pathways-under-methionine-restriction-and-recovery-with-d-l-methionine-or-d-l-hmtba-in-meat-type-chickens
#5
S E Aggrey, F González-Cerón, R Rekaya, Y Mercier
This study examined the molecular mechanisms of methionine pathways in meat-type chickens where birds were provided with a diet deficient in methionine from 3 to 5 weeks of age. The birds on the deficient diet were then provided with a diet supplemented with either D,L-methionine or D,L-HMTBA from 5 to 7 weeks. The diet of the control birds was supplemented with L-methionine from hatch till 7 weeks of age. We studied the mRNA expression of methionine adenosyltransferase 1, alpha, methionine adenosyltransferase 1, beta, 5-methyltetrahydrofolate-homocysteine methyltransferase, 5-methyltetrahydrofolate-homocysteine methyltransferase reductase, betaine-homocysteine S-methyltransferase, glycine N-methyltransferase, S-adenosyl-L-homocysteine hydrolase and cystathionine beta synthase genes in the liver, duodenum, Pectoralis (P...
October 6, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28862677/simulation-of-food-folate-digestion-and-bioavailability-of-an-oxidation-product-of-5-methyltetrahydrofolate
#6
Christiane Ringling, Michael Rychlik
Generating bioavailability data from in vivo studies is time-consuming and expensive. In vitro simulation can help to investigate factors influencing bioavailability or facilitate quantifying the impact of such factors. For folates, an efficient deconjugation of polyglutamates to the corresponding monoglutamates is crucial for bioavailability and highly dependent on the food matrix. Therefore, the bioaccessibility of folates of different foodstuffs was examined using a simulated digestion model with respect to folate stability and the efficiency of deconjugation...
September 1, 2017: Nutrients
https://www.readbyqxmd.com/read/28804631/the-influence-of-d-chiro-inositol-and-d-myo-inositol-in-pregnant-women-with-glucose-intolerance
#7
Domenico Dell'Edera, Francesca Sarlo, Arianna Allegretti, Francesca Simone, Maria Giovanna Lupo, Annunziata Anna Epifania
The aim of the present study was to demonstrate that the use of inositol and folic acid from the first trimester of pregnancy, counteracts the onset of gestational diabetes mellitus (GDM) in women at risk, preserving the infants from macrosomia, hypoglycemia and preterm delivery. The authors collected data from the pregnant women at the laboratory (Unit of Cytogenic and Molecular Genetics), from January 2014 to April 2016, all with first trimester fasting plasma glucose (FPG) >92 mg/dl. A total of 40 women were treated with 250 mg/day D-chiro-inositol, 1...
August 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28801717/vitamin-b6-is-essential-for-serine-de-novo-biosynthesis
#8
Rúben J Ramos, Mia L Pras-Raves, Johan Gerrits, Maria van der Ham, Marcel Willemsen, Hubertus Prinsen, Boudewijn Burgering, Judith J Jans, Nanda M Verhoeven-Duif
Pyridoxal 5'-phosphate (PLP), the metabolically active form of vitamin B6, plays an essential role in brain metabolism as a cofactor in numerous enzyme reactions. PLP deficiency in brain, either genetic or acquired, results in severe drug-resistant seizures that respond to vitamin B6 supplementation. The pathogenesis of vitamin B6 deficiency is largely unknown. To shed more light on the metabolic consequences of vitamin B6 deficiency in brain, we performed untargeted metabolomics in vitamin B6-deprived Neuro-2a cells...
November 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/28770950/prevention-of-neural-tube-defects-and-maternal-gestational-diabetes-through-the-inositol-supplementation-preliminary-results
#9
D Dell'Edera, F Sarlo, A Allegretti, A A Epifania, F Simone, M G Lupo, M Benedetto, M R D'Apice, A Capalbo
OBJECTIVE: Our study aims to demonstrate that the use in the preconceptional period until the 24th week of pregnancy of inositol and folic acid, first of all, preserves the product of conception from neural tube defects (NTDs) and then, thanks to inositol supplementation, it possibly counteracts and prevents the onset of maternal gestational diabetes (GDM). PATIENTS AND METHODS: We have collected data derived from pregnant women arrived at our laboratory, from January 2014 to January 2016, with no family history of type 2 diabetes and hypertension...
July 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28768831/two-international-round-robin-studies-showed-good-comparability-of-5-methyltetrahydrofolate-but-poor-comparability-of-folic-acid-measured-in-serum-by-different-high-performance-liquid-chromatography-tandem-mass-spectrometry-methods
#10
COMPARATIVE STUDY
Zia Fazili, Maya R Sternberg, Neelima Paladugula, Christine M Pfeiffer
Background: Serum folate methods produce different results. The comparability of HPLC-mass spectrometry (MS)/MS methods is not well documented.Objective: We conducted an international "round-robin" investigation to assess the comparability, precision, and accuracy of serum folate HPLC-MS/MS methods.Methods: The CDC laboratory, 7 laboratories with independently developed methods (group 1), and 6 laboratories with an adapted CDC method (group 2) analyzed folate forms in 6 serum pools and 6 calibrators from the CDC (duplicate analysis over 2 d) and in two 3-level reference materials (duplicate analysis)...
September 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28707064/development-of-a-lateral-flow-dipstick-immunoassay-for-evaluation-of-folate-levels-in-maize
#11
Qiuju Liang, Chen Yi, Ling Jiang, Guiyu Tan, Chunyi Zhang, Baomin Wang
Folates (vitamin B9) are essential for all organisms as cofactors for one-carbon metabolism. However, measurement of folates is technically complicated and time-consuming. In this study, we developed a dipstick immunoassay using a folate-specific monoclonal antibody (mAb), allowing rapid and low-cost detection of folates. The indicator range of the dipstick for 5-formylterahydrofolate (5-CHO-THF), 5-methyltetrahydrofolate (5-CH3-THF) and their polyglutamyl forms was 100-200 ng mL(-1); moreover, no cross-reactivity was observed with tetrahydrofolate (THF) or 5,10-methenyltetrahydrofolate (5,10-CH=THF) at 500 ng mL(-1), or with the folate precursors pterin-6-COOH, p-aminobenzoate (pABA), and L-glutamate, or with the folate analogues methotrexate and 10-formyltetrahydrofolate (10-CHO-THF) at up to 1000 ng mL(-1)...
July 13, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28685492/role-of-intramuscular-levofolinate-administration-in%C3%A2-the%C3%A2-treatment-of-hereditary-folate-malabsorption-report-of-three-cases
#12
Emanuela Manea, Paul Gissen, Simon Pope, Simon J Heales, Spyros Batzios
Hereditary folate malabsorption is a rare autosomal recessive disorder caused by impaired active folate transport across membranes and into the central nervous system due to loss-of-function mutations in proton-coupled folate transporter (PCFT). Newborns with this condition have initially normal folate stores, but as they are unable to absorb dietary folate and use rapidly their stores because of their growth demands, symptoms appear in the early infancy. Significant neurological morbidity usually follows the initial non-specific clinical presentation and delayed initiation of treatment...
July 7, 2017: JIMD Reports
https://www.readbyqxmd.com/read/28623948/one-carbon-metabolism-cognitive-impairment-and-csf-measures-of-alzheimer-pathology-homocysteine-and-beyond
#13
Loïc Dayon, Seu Ping Guiraud, John Corthésy, Laeticia Da Silva, Eugenia Migliavacca, Domilė Tautvydaitė, Aikaterini Oikonomidi, Barbara Moullet, Hugues Henry, Sylviane Métairon, Julien Marquis, Patrick Descombes, Sebastiano Collino, François-Pierre J Martin, Ivan Montoliu, Martin Kussmann, Jérôme Wojcik, Gene L Bowman, Julius Popp
BACKGROUND: Hyperhomocysteinemia is a risk factor for cognitive decline and dementia, including Alzheimer disease (AD). Homocysteine (Hcy) is a sulfur-containing amino acid and metabolite of the methionine pathway. The interrelated methionine, purine, and thymidylate cycles constitute the one-carbon metabolism that plays a critical role in the synthesis of DNA, neurotransmitters, phospholipids, and myelin. In this study, we tested the hypothesis that one-carbon metabolites beyond Hcy are relevant to cognitive function and cerebrospinal fluid (CSF) measures of AD pathology in older adults...
June 17, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28551248/evaluating-folate-extraction-from-infant-milk-formulae-and-adult-nutritionals-enzymatic-digestion-versus-enzyme-free-heat-treatment
#14
COMPARATIVE STUDY
Maria V Chandra-Hioe, Martin P Bucknall, Jayashree Arcot
This study compares enzymatic treatments to release folic acid (FA) and endogenous 5-methyltetrahydrofolate (5-MTHF) from infant milk formulae with enzyme-free heat extraction. The limits of detection and quantitation of FA were 1.4ng/mL and 3.1ng/mL, respectively; 7.5ng/mL and 16.2ng/mL for 5-MTHF. Absolute mean recoveries were 85% (FA) and 95% (5-MTHF). The RSD of the within-run variability was 6% and the inter-day variability was 8%. Averaged measurements of FA and 5-MTHF in SRM-1849a were within the certified value range...
November 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28475162/characterization-and-interrelations-of-one-carbon-metabolites-in-tissues-erythrocytes-and-plasma-in-mice-with-dietary-induced-folate-deficiency
#15
Markus Kopp, Rosalie Morisset, Michael Rychlik
Studies on one-carbon metabolism for the assessment of folate deficiency have focused on either metabolites of folate metabolism or methionine cycle. To bridge the gap between deficiency markers in these pathways we designed a dietary induced folate deficiency study using male C57BL/6N mice. After weaning (3 weeks) mice were fed a defined control diet (1 week) before being fed a folate deficient diet (n = 6 mice) and the control diet (n = 6 mice) for 12 additional weeks. Thereafter, we determined total homocysteine in plasma and folate in erythrocytes as well as S-adenosylmethionine, S-adenosylhomocysteine, and six folate vitamers in tissues including 5-methyltetrahydrofolate, 5-formyltetrahydrofolate, 5,10-methenyltetrahydrofolate, tetrahydrofolate, 10-formylfolic acid, and folic acid by means of stable isotope dilution assays coupled with liquid chromatography tandem mass spectrometry...
May 5, 2017: Nutrients
https://www.readbyqxmd.com/read/28461497/folate-rescues-vitamin-b12-depletion-induced-inhibition-of-nuclear-thymidylate-biosynthesis-and-genome-instability
#16
Ashley M Palmer, Elena Kamynina, Martha S Field, Patrick J Stover
Clinical vitamin B12 deficiency can result in megaloblastic anemia, which results from the inhibition of DNA synthesis by trapping folate cofactors in the form of 5-methyltetrahydrofolate (5-methylTHF) and subsequent inhibition of de novo thymidylate (dTMP) biosynthesis. In the cytosol, vitamin B12 functions in the remethylation of homocysteine to methionine, which regenerates THF from 5-methylTHF. In the nucleus, THF is required for de novo dTMP biosynthesis, but it is not understood how 5-methylTHF accumulation in the cytosol impairs nuclear dTMP biosynthesis...
May 16, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28460586/supplementation-with-6s-5-methyltetrahydrofolate-or-folic-acid-equally-reduces-serum-homocysteine-concentrations-in-older-adults
#17
Ewa Sicińska, Anna Brzozowska, Wojciech Roszkowski, Paul M Finglas
Folic acid (FA) supplementation reduces the elevated serum homocysteine (Hcy) concentrations. [6 S]-5-methyltetrahydrofolate ([6 S]-5-MTHF) is an alternative to FA due to possible advantages, that is, no masking cobalamin deficiency. The study aim was to evaluate the effectiveness of [6 S]-5-MTHF in relations to FA supplementation in reducing the serum Hcy. Healthy volunteers, aged 50-65, had normal serum folate and did not use supplements with B-vitamins for 6 months. Forty subjects were divided into two groups: receiving 400 μg/d FA or the equimolar amount of [6 S]-5-MTHF...
May 2, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/28459050/assessing-volumetric-absorptive-microsampling-coupled-with-stable-isotope-dilution-assay-and-liquid-chromatography-tandem-mass-spectrometry-as-potential-diagnostic-tool-for-whole-blood-5-methyltetrahydrofolic-acid
#18
Markus Kopp, Michael Rychlik
Volumetric absorptive microsamplers (VAMS) have been developed recently as a promising tool for clinical blood sampling. Compared to dried blood spot samples analyzed by accurate stable isotope dilution assays (SIDAs), the new technique could provide further substantial miniaturizing of folate assays by eliminating hematocrit effects and uneven analyte distribution within the sample. Herein, we present a miniaturized SIDA coupled with LC-MS/MS measurement of 5-methyltetrahydrofolic acid as main folate vitamer in whole blood (WB) using [(13)C5]-5-methyltetrahydrofolic acid as internal standard...
2017: Frontiers in Nutrition
https://www.readbyqxmd.com/read/28377750/measurements-of-intra-and-extra-cellular-5-methyltetrahydrofolate-indicate-that-bifidobacterium-adolescentis-dsm-20083-t-and-bifidobacterium-pseudocatenulatum-dsm-20438-t-do-not-actively-excrete-5-methyltetrahydrofolate-in-vitro
#19
Markus Kopp, Kerstin Dürr, Matthias Steigleder, Thomas Clavel, Michael Rychlik
Certain intestinal bifidobacteria have the ability to synthesize folates. In vitro experiments revealed a high production, cellular accumulation, and release of reduced folate vitamers like 5-methyltetrahydrofolate and tetrahydrofolate in folate-free medium (FFM). However, it is still unclear to which extent synthesized folates are polyglutamylated and probably not available for transport, and if they are actively released by excretion. To address these questions, we characterized intra- and extra-cellular pteroylmonoglutamates and polyglutamylated 5-methyltetrahydrofolate (5-CH3-H4PteGlu2-4) in Bifidobacterium adolescentis DSM 20083(T) and Bifidobacterium pseudocatenulatum DSM 20438(T)in vitro...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28367928/quantification-of-total-folate-folate-species-and-polyglutamyl-folate-distribution-in-winged-beans-psophocarus-tetragonolobus-l-dc-from-different-cultivars-and-growth-stages-by-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry
#20
Shuangyan Luo, Hanying Duan, Yuchen Zou, Ruixia Qiu, Chao Wang
Winged beans are an important natural source of some micronutrients. This paper presents the first complete characterization of folate derivatives including polyglutamyl 5-methyltetrahydrofolate (5-CH3-H4PteGlun), folate species and total folate accumulating in pods and immature seeds of winged beans from 9 cultivars and 7 growth stages. 5-CH3-H4PteGlun and folate species were determined with a UHPLC-MS/MS method. Accurate determination of 5-CH3-H4PteGlun and folate species was optimized and validated according to EMA guidelines including method selectivity, sensitivity, linearity, accuracy, precision, matrix effect and carry-over...
2017: Journal of Nutritional Science and Vitaminology
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