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https://www.readbyqxmd.com/read/27860207/mediterranean-diet-gene-interactions-a-targeted-metabolomics-study-in-greek-cypriot-women
#1
Maria G Kakkoura, Kleitos Sokratous, Christiana A Demetriou, Maria A Loizidou, Giorgos Loucaides, Eleni Kakouri, Andreas Hadjisavvas, Kyriacos Kyriacou
SCOPE: A high adherence to the Mediterranean diet (MD) was previously associated with a decreased risk of breast cancer (BC) among Greek-Cypriot women. Additionally, particular polymorphisms were shown to modulate this MD-BC association. Herein, we aimed to investigate the effect of polymorphisms-MD interactions on the levels of specific metabolites that could be related to dietary adherence or enzymatic activity, which is itself modulated by polymorphisms. METHODS AND RESULTS: Greek-Cypriot women who were BC controls and had the lowest or the highest MD adherence (vegetables, fruit, legumes, fish) as assessed by principal component analysis (n = 564) were included...
November 18, 2016: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/27774577/retrospective-case-control-study-of-correlation-between-mthfr-gene-and-oscc-risk-in-north-india
#2
Hena Naqvi, Mohammad Kaleem Ahmad, Syed Rizwan Hussain, Shalini Gupta, Mohammad Waseem, Abbas Ali Mahdi
BACKGROUND: Oral squamous cell carcinoma (OSCC) occurrence appears to be the number one among all cancers in India. Folate is a methyl donor during DNA methylation, as it provides substrate for methylenetetrahydrofolate reductase (MTHFR) to convert 5,10-MTHF to 5-MTHF and subsequently metabolizes it to methionine. The purpose of this study was to identify MTHFR C677T gene polymorphism in patients with OSCC. MATERIALS AND METHODS: A total of 350 OSCC cases and 350 healthy controls participated in this study...
October 24, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27523499/neurometabolic-disorders-potentially-treatable-abnormalities-in-patients-with-treatment-refractory-depression-and-suicidal-behavior
#3
Lisa A Pan, Petra Martin, Thomas Zimmer, Anna Maria Segreti, Sivan Kassiff, Brian W McKain, Cynthia A Baca, Manivel Rengasamy, Keith Hyland, Nicolette Walano, Robert Steinfeld, Marion Hughes, Steven K Dobrowolski, Michele Pasquino, Rasim Diler, James Perel, David N Finegold, David G Peters, Robert K Naviaux, David A Brent, Jerry Vockley
OBJECTIVE: Treatment-refractory depression is a devastating condition with significant morbidity, mortality, and societal cost. At least 15% of cases of major depressive disorder remain refractory to treatment. The authors previously identified a young adult with treatment-refractory depression and multiple suicide attempts with an associated severe deficiency of CSF tetrahydrobiopterin, a critical cofactor for monoamine neurotransmitter synthesis. Treatment with sapropterin, a tetrahydrobiopterin analogue, led to dramatic and long-lasting remission of depression...
August 13, 2016: American Journal of Psychiatry
https://www.readbyqxmd.com/read/27507672/homocysteine-metabolism-is-associated-with-cerebrospinal-fluid-levels-of-soluble-amyloid-precursor-protein-and-amyloid-beta
#4
Aikaterini Oikonomidi, Piotr Lewczuk, Johannes Kornhuber, Yvo Smulders, Michael Linnebank, Alexander Semmler, Julius Popp
Disturbed homocysteine metabolism may contribute to amyloidogenesis by modulating the amyloid precursor protein (APP) production and processing. The objective of this study was to investigate the relationships between cerebral amyloid production and both blood and cerebrospinal fluid (CSF) markers of the homocysteine metabolism. We assessed CSF concentrations of soluble APPα, soluble APPβ, and amyloid β1-42 (Aβ1-42), as well as plasma levels of homocysteine (Hcys), total vitamin B12, and folate, and CSF concentrations of homocysteine (Hcys-CSF), 5-methyltetrahydrofolate (5-MTHF), S-adenosylmethionine (SAM), and S-adenosylhomocysteine (SAH) in 59 subjects with normal cognition...
October 2016: Journal of Neurochemistry
https://www.readbyqxmd.com/read/27178705/csf-concentrations-of-5-methyltetrahydrofolate-in-a-cohort-of-young-children-with-autism
#5
John Shoffner, Barbara Trommer, Audrey Thurm, Cristan Farmer, William A Langley, Laura Soskey, Aldeboran N Rodriguez, Precilla D'Souza, Sarah J Spence, Keith Hyland, Susan E Swedo
OBJECTIVE: To examine the association between cerebral folate deficiency and autism, this study examined CSF 5-methyltetrahydrofolate (5-MTHF) concentrations in a group of young children with autism, investigated the natural variation in CSF 5-MTHF over time, and assessed the relationship between CSF 5-MTHF and symptoms. METHODS: CSF was collected from 67 children with a diagnosis of DSM-IV-TR autistic disorder (age, mean ± SD 43 ± 11 months), with a second CSF sample obtained 1-3 years later on 31 of these subjects (time to follow-up, 30 ± 8 months)...
June 14, 2016: Neurology
https://www.readbyqxmd.com/read/27008238/enhanced-oral-bioavailability-of-a-novel-folate-salt-comparison-with-folic-acid-and-a-calcium-folate-salt-in-a-pharmacokinetic-study-in-rats
#6
Niccolò Miraglia, Marco Agostinetto, Davide Bianchi, Ermanno Valoti
BACKGROUND: Folates play an important role to prevent neurological disorders in embryo development and in cardiovascular diseases. Folate supplementation is suggested, particularly in females of childbearing age, for the prevention of embryonal NTDs during pregnancy. Folic acid and reduced folate ((6S)5-MTHF) are currently used in supplementation. The aim of this study was to compare the bioavailability of Quatrefolic®, a novel patented (6S)5-MTHF glucosamine salt, with (6S)5-MTHF calcium salt and folic acid in Sprague Dawley rats...
April 2016: Minerva Ginecologica
https://www.readbyqxmd.com/read/26898294/treatment-with-mefolinate-5-methyltetrahydrofolate-but-not-folic-acid-or-folinic-acid-leads-to-measurable-5-methyltetrahydrofolate-in-cerebrospinal-fluid-in-methylenetetrahydrofolate-reductase-deficiency
#7
L Knowles, A A M Morris, J H Walter
S-adenosyl methionine, which is formed from methionine, is an essential methyl donor within the central nervous system. Methionine is formed by the enzyme methionine synthase for which 5-methyltetrahydrofolate (5-MTHF) and homocysteine are substrates. Patients with severe methylenetetrahydrofolate reductase (MTHFR) deficiency cannot make 5-MTHF and have extremely low levels in the CSF. As a consequence, methylation reactions in the CNS are compromised, and this is likely to play an important role in the neurological abnormalities that occur in MTHFR deficiency...
February 23, 2016: JIMD Reports
https://www.readbyqxmd.com/read/26821044/impact-of-food-rations-and-supplements-on-micronutrient-status-by-trimester-of-pregnancy-cross-sectional-studies-in-the-maela-refugee-camp-in-thailand
#8
Wolfgang Stuetz, Verena I Carrara, Rose Mc Gready, Sue J Lee, Kanlaya Sriprawat, Basi Po, Borimas Hanboonkunupakarn, Tilman Grune, Hans K Biesalski, François H Nosten
Micronutrient fortified flour (MFF), supplementary food rations and micronutrient (MN) supplements may prevent deficiencies among pregnant women. Objectives of cross-sectional surveys in 2004 (n = 533) and 2006 (n = 515) were to assess the impact of new food rations (flour, oil) and supplements on MN status by trimester of pregnancy in the Maela refugee camp. Hemoglobin, iron status, zinc, retinol, β-carotene and tryptophan decreased, while α-/γ-tocopherol and 5-methyltetrahydrofolate (5-MTHF) increased from first to third trimester...
January 26, 2016: Nutrients
https://www.readbyqxmd.com/read/26794902/modulation-of-the-uptake-of-critical-nutrients-by-breast-cancer-cells-by-lactate-impact-on-cell-survival-proliferation-and-migration
#9
Marta Guedes, João R Araújo, Ana Correia-Branco, Inês Gregório, Fátima Martel, Elisa Keating
This work aimed to characterize the uptake of folate and glucose by breast cancer cells and to study the effect of lactate upon the transport of these nutrients and upon cell viability, proliferation and migration capacity. Data obtained showed that: a) MCF7 cells uptake (3)H-folic acid ((3)H-FA) at physiological but not at acidic pH; b) T47D cells accumulate (3)H-FA and (14)C-5-methyltetrahydrofolate ((14)C-5-MTHF) more efficiently at acidic than at physiological pH; c) (3)H-deoxyglucose ((3)H-DG) uptake by T47D cells is sodium-independent, inhibited by cytochalasin B (CYT B) and stimulated by insulin...
February 15, 2016: Experimental Cell Research
https://www.readbyqxmd.com/read/26630680/methyltetrahydrofolate-vs-folic-acid-supplementation-in-idiopathic-recurrent-miscarriage-with-respect-to-methylenetetrahydrofolate-reductase-c677t-and-a1298c-polymorphisms-a-randomized-controlled-trial
#10
RANDOMIZED CONTROLLED TRIAL
Azita Hekmatdoost, Farhad Vahid, Zahra Yari, Mohammadreza Sadeghi, Hassan Eini-Zinab, Niknam Lakpour, Soheila Arefi
PURPOSE: To determine whether 5-methylenetetrahydrofolate (MTHF) is more effective than folic acid supplementation in treatment of recurrent abortion in different MTHFR gene C677T and A1298C polymorphisms. METHODS: A randomized, double blind, placebo-controlled trial conducted April 2011-September 2014 in recurrent abortion clinics in Tehran, Iran. The participants were women with three or more idiopathic recurrent abortion, aged 20 to 45 years. Two hundred and twenty eligible women who consented to participate were randomly assigned to receive either folic acid or 5-MTHF according to the stratified blocked randomization by age and the number of previous abortions...
2015: PloS One
https://www.readbyqxmd.com/read/26602129/quantitation-of-5-methyltetrahydrofolate-in-cerebrospinal-fluid-using-liquid-chromatography-electrospray-tandem-mass-spectrometry
#11
Erland Arning, Teodoro Bottiglieri
We describe a simple stable isotope dilution method for accurate and precise measurement of cerebrospinal fluid (CSF) 5-methyltetrahydrofolate (5-MTHF) as a clinical diagnostic test. 5-MTHF is the main biologically active form of folic acid and is involved in regulation of homocysteine and DNA synthesis. Measurement of 5-MTHF in CSF provides diagnostic information regarding diseases affecting folate metabolism within the central nervous system, in particular inborn errors of folate metabolism. Determination of 5-MTHF in CSF (50 μL) was performed utilizing high performance liquid chromatography coupled with electrospray positive ionization tandem mass spectrometry (HPLC-ESI-MS/MS)...
2016: Methods in Molecular Biology
https://www.readbyqxmd.com/read/26561619/folate-and-long-chain-polyunsaturated-fatty-acid-supplementation-during-pregnancy-has-long-term-effects-on-the-attention-system-of-8-5-y-old-offspring-a-randomized-controlled-trial
#12
RANDOMIZED CONTROLLED TRIAL
Andrés Catena, J Angela Muñoz-Machicao, Francisco J Torres-Espínola, Cristina Martínez-Zaldívar, Carolina Diaz-Piedra, Angel Gil, Gudrun Haile, Eszter Györei, Anne M Molloy, Tamás Decsi, Berthold Koletzko, Cristina Campoy
BACKGROUND: During fetal and perinatal periods, many nutrients, such as long-chain polyunsaturated fatty acids [contained in fish oil (FO)] and folate, are important in achieving normal brain development. Several studies have shown the benefits of early nutrition on children's neurocognitive development. However, the evidence with regard to the attention system is scarce. OBJECTIVES: The aim of this study was to analyze the long-term effects of FO, 5-methyltetrahydrofolate (5-MTHF), or FO+5-MTHF prenatal supplementation on attention networks...
January 2016: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/26350168/one-pot-2-methyltetrahydrofuran-production-from-levulinic-acid-in-green-solvents-using-ni-cu-al2-o3-catalysts
#13
Iker Obregón, Iñaki Gandarias, Nemanja Miletić, Ainhoa Ocio, Pedro L Arias
The one-pot hydrogenation of levulinic acid to 2-methyltetrahydrofuran (MTHF) was performed using a series of Ni-Cu/Al2 O3 catalysts in green solvents, such as water and biomass-derived alcohols. Ni/Al2 O3 provided the highest activity, whereas Cu/Al2 O3 was the most selective, reaching a 75 % MTHF yield at 250 °C after 24 h reaction time. Synergetic effects were observed when bimetallic Ni-Cu/Al2 O3 catalysts were used, reaching a 56 % MTHF yield in 5 h at 250 °C for the optimum Ni/Cu ratio. Remarkably, these high yields were obtained using non-noble metal-based catalysts and 2-propanol as the solvent...
October 26, 2015: ChemSusChem
https://www.readbyqxmd.com/read/26189513/phase-1-dose-de-escalation-trial-of-the-endogenous-folate-6r-5-10-methylene-tetrahydrofolate-in-combination-with-fixed-dose-pemetrexed-as-neoadjuvant-therapy-in-patients-with-resectable-rectal-cancer
#14
Bengt Gustavsson, Göran Carlsson, Torbjörn Swartling, Göran Kurlberg, Kristoffer Derwinger, Hillevi Björkqvist, Elisabeth Odin, Fernando Gibson
BACKGROUND: Modufolin® ([6R]-5,10-methylene tetrahydrofolate; [6R]-MTHF) is an endogenous biomodulator that is being developed as an alternative to leucovorin, a folate prodrug used in the treatment of colorectal cancer. The objective of this phase 1 dose de-escalation trial was to estimate the minimum tolerated dose of [6R]-MTHF to be used in combination with pemetrexed 500 mg/m(2) in the neoadjuvant treatment of patients with rectal cancer. METHODS: Adult patients (≥18 years) with resectable rectal adenocarcinoma were allocated to [6R]-MTHF doses of 500, 100, 50, and 10 mg/m(2) in combination with pemetrexed 500 mg/m(2)...
October 2015: Investigational New Drugs
https://www.readbyqxmd.com/read/25841618/cyclic-supplementation-of-5-mthf-is-effective-for-the-correction-of-hyperhomocysteinemia
#15
Pasquale Ambrosino, Roberta Lupoli, Alessandro Di Minno, Assunta Nardo, Emiliana Marrone, Valentina Lupoli, Alessandra Scaravilli, Emma Mitidieri, Antonella Tufano, Matteo Nicola Dario Di Minno
Folic acid supplementation is the mainstay treatment of hyperhomocysteinemia (HHcy). However, no recommendations are currently available in regard to the optimal replacement therapy. Therefore, this prospective study hypothesized that a cyclic schedule (1 month of therapy followed by 2 months of withdrawal) of 5-methyltetrahydrofolate (5-MTHF) would reduce plasma levels of fasting total homocysteine (tHcy) in patients with mild/moderate HHcy. Patients with a new diagnosis of mild/moderate HHcy were evaluated for the methylenetetrahydrofolate reductase genotype and the presence of major features of metabolic syndrome...
June 2015: Nutrition Research
https://www.readbyqxmd.com/read/25802929/folates-induce-colorectal-carcinoma-ht29-cell-line-proliferation-through-notch1-signaling
#16
Juan M Rodriguez, Dante Miranda, Daniel Bunout, Ana María Ronco, María Pía de la Maza, Sandra Hirsch
Folic acid (FA) consumption at high levels has been associated with colon cancer risk. Several mechanisms have been proposed to explain this association. The Notch signal pathway has been implicated in the regulation of cellular proliferation. Our aim was to demonstrate that high concentrations of FA or its reduced form, 5-methyltetrahydrofolic acid (5-MTHF), increase colorectal carcinoma HT29 cell proliferation through an increase of Notch1 activation and to prove if the inhibition of Notch1 activation by gamma secretase inhibitor, reduce the effect of folic acid...
2015: Nutrition and Cancer
https://www.readbyqxmd.com/read/25784552/the-class-iii-cyclobutane-pyrimidine-dimer-photolyase-structure-reveals-a-new-antenna-chromophore-binding-site-and-alternative-photoreduction-pathways
#17
Patrick Scheerer, Fan Zhang, Jacqueline Kalms, David von Stetten, Norbert Krauß, Inga Oberpichler, Tilman Lamparter
Photolyases are proteins with an FAD chromophore that repair UV-induced pyrimidine dimers on the DNA in a light-dependent manner. The cyclobutane pyrimidine dimer class III photolyases are structurally unknown but closely related to plant cryptochromes, which serve as blue-light photoreceptors. Here we present the crystal structure of a class III photolyase termed photolyase-related protein A (PhrA) of Agrobacterium tumefaciens at 1.67-Å resolution. PhrA contains 5,10-methenyltetrahydrofolate (MTHF) as an antenna chromophore with a unique binding site and mode...
May 1, 2015: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/25777577/5-methyl-tetrahydrofolate-in-prevention-of-recurrent-preeclampsia
#18
Gabriele Saccone, Laura Sarno, Amanda Roman, Vera Donadono, Giuseppe Maria Maruotti, Pasquale Martinelli
OBJECTIVE: To evaluate the efficacy of 5-methyl-tetrahydrofolate (5-MTHF) supplementation in prevention of recurrent preeclampsia. METHODS: Retrospective cohort of women who received daily oral 5-MTHF 15 mg supplementation as prophylactic treatment since first trimester for recurrent preeclampsia were compared with women who did not. All asymptomatic singleton gestations with prior preeclampsia (in the previous pregnancy) were included. Women with chronic hypertension were excluded...
March 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/25760227/direct-detection-of-a-triplet-vinylnitrene-1-4-naphthoquinone-2-ylnitrene-in-solution-and-cryogenic-matrices
#19
Sujan K Sarkar, Asako Sawai, Kousei Kanahara, Curt Wentrup, Manabu Abe, Anna D Gudmundsdottir
The photolysis of 2-azido-1,4-naphthoquinone (1) in argon matrices at 8 K results in the corresponding triplet vinylnitrene (3)2, which was detected directly by IR spectroscopy. Vinylnitrene (3)2 is stable in argon matrices but forms 2-cyanoindane-1,3-dione (3) upon further irradiation. Similarly, the irradiation of azide 1 in 2-methyltetrahydrofuran (MTHF) matrices at 5 K resulted in the ESR spectrum of vinylnitrene (3)2, which is stable up to at least 100 K. The zero-field splitting parameters for nitrene (3)2, D/hc = 0...
April 1, 2015: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/25748442/folic-acid-supplementation-improves-microvascular-function-in-older-adults-through-nitric-oxide-dependent-mechanisms
#20
RANDOMIZED CONTROLLED TRIAL
Anna E Stanhewicz, Lacy M Alexander, W Larry Kenney
Older adults have reduced vascular endothelial function, evidenced by attenuated nitric oxide (NO)-dependent cutaneous vasodilatation. Folic acid and its metabolite, 5-methyltetrahydrofolate (5-MTHF), are reported to improve vessel function. We hypothesized that (i) local 5-MTHF administration and (ii) chronic folic acid supplementation would improve cutaneous microvascular function in ageing through NO-dependent mechanisms. There were two separate studies in which there were 11 young (Y: 22 ± 1 years) and 11 older (O: 71 ± 3 years) participants...
July 2015: Clinical Science (1979-)
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