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fumaric acid

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https://www.readbyqxmd.com/read/27913198/argininosuccinate-synthetase-1-ass1-is-a-common-metabolic-marker-of-chemosensitivity-for-targeted-arginine-and-glutamine-starvation-therapy
#1
Yan Long, Wen-Bin Tsai, Dajuan Wang, David H Hawke, Niramol Savaraj, Lynn G Feun, Mien-Chie Hung, Helen H W Chen, Macus Tien Kuo
Argininosuccinate synthetase 1 (ASS1) is the rate-limiting enzyme that catalyzes the biosynthesis of arginine (Arg). Many malignant human tumors are auxotrophic for Arg because ASS1 is silenced. ASS1 has been established as a sensor of Arg auxotrophic response and a chemosensitivity marker for Arg starvation therapy. Here, we report that ASS1 is also a sensor for glutamine (Gln)-deprivation response, and that upregulation of ASS1 expression is associated with resistance to Gln-starvation treatments. Knockdown of ASS1 expression resulted in increased sensitivity to both Arg- and Gln-starvation, whereas increased ASS1 expression by ectopic transfection is associated with resistance to both Arg- and Gln-starvation...
November 29, 2016: Cancer Letters
https://www.readbyqxmd.com/read/27898315/single-step-single-organism-bioethanol-production-and-bioconversion-of-lignocellulose-waste-materials-by-phlebioid-fungal-species
#2
Hans Mattila, Jaana Kuuskeri, Taina Lundell
Ethanol production from non-pretreated lignocellulose was carried out in a consolidated bioprocess with wood-decay fungi of phlebioid Polyporales. Ethanol production was attempted on glucose, spruce wood sawdust and waste core board. Substantial quantities of ethanol were achieved, and isolate Phlebia radiata 0043 produced 5.9g/L of ethanol reaching the yield of 10.4% ethanol from core board lignocellulose substrate. Acidic initial culture conditions (pH 3) induced ethanol fermentation compared to the more neutral environment...
November 22, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27894844/the-tricarboxylic-acid-cycle-activity-in-cultured-primary-astrocytes-is-strongly-accelerated-by-the-protein-tyrosine-kinase-inhibitor-tyrphostin-23
#3
Michaela C Hohnholt, Eva-Maria Blumrich, Helle S Waagepetersen, Ralf Dringen
Tyrphostin 23 (T23) is a well-known inhibitor of protein tyrosine kinases and has been considered as potential anti-cancer drug. T23 was recently reported to acutely stimulate the glycolytic flux in primary cultured astrocytes. To investigate whether T23 also affects the tricarboxylic acid (TCA) cycle, we incubated primary rat astrocyte cultures with [U-(13)C]glucose in the absence or the presence of 100 μM T23 for 2 h and analyzed the (13)C metabolite pattern. These incubation conditions did not compromise cell viability and confirmed that the presence of T23 doubled glycolytic lactate production...
November 25, 2016: Neurochemistry International
https://www.readbyqxmd.com/read/27889959/fumaric-acid-esters-attenuate-secondary-degeneration-following-spinal-cord-injury
#4
Marika Cordaro, Giovanna Casili, Irene Paterniti, Salvatore Cuzzocrea, Emanuela Esposito
Spinal cord injury (SCI) causes permanent changes in motor, sensory and autonomic functions. Unfortunately, there are not a stable cures and current treatments include surgical decompression, methylprednisolone and hemodynamic control that lead to modest function recovery. Fumaric acid esters (FAEs) were firstly used in the management of an immunological skin disorder, such as psoriasis. Because of their potent anti-inflammatory effects, they have been introduced in multiple sclerosis. Investigation shown not only anti-inflammatory, but also supposed neuroprotective mechanism of action...
November 27, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27881557/plasma-metabolomics-implicate-modified-transfer-rnas-and-altered-bioenergetics-in-the-outcome-of-pulmonary-arterial-hypertension
#5
Christopher J Rhodes, Pavandeep Ghataorhe, John Wharton, Kevin C Rue-Albrecht, Charaka Hadinnapola, Geoffrey Watson, Marta Bleda, Matthias Haimel, Gerry Coghlan, Paul A Corris, Luke S Howard, David G Kiely, Andrew J Peacock, Joanna Pepke-Zaba, Mark Toshner, Stephen J Wort, J Simon R Gibbs, Allan Lawrie, Stefan Gräf, Nicholas W Morrell, Martin R Wilkins
BACKGROUND: -Pulmonary arterial hypertension (PAH) is a heterogeneous disorder with high mortality. METHODS: -We conducted a comprehensive study of plasma metabolites using ultra-performance liquid chromatography mass-spectrometry to (1) identify patients at high risk of early death, (2) identify patients who respond well to treatment and (3) provide novel molecular insights into disease pathogenesis. RESULTS: -53 circulating metabolites distinguished well-phenotyped patients with idiopathic or heritable PAH (n=365) from healthy controls (n=121) following correction for multiple testing (p<7...
November 21, 2016: Circulation
https://www.readbyqxmd.com/read/27879336/beyond-antimicrobial-resistance-evidence-for-a-distinct-role-of-the-acrd-efflux-pump-in-salmonella-biology
#6
Michelle M C Buckner, Jessica M A Blair, Roberto M La Ragione, Jane Newcombe, Daniel J Dwyer, Alasdair Ivens, Laura J V Piddock
: For over 20 years, bacterial multidrug resistance (MDR) efflux pumps have been studied because of their impact on resistance to antimicrobials. However, critical questions remain, including why produce efflux pumps under non-antimicrobial treatment conditions, and why have multiple pumps if their only purpose is antimicrobial efflux? Salmonella spp. possess five efflux pump families, including the resistance-nodulation-division (RND) efflux pumps. Notably, the RND efflux pump AcrD has a unique substrate profile, distinct from other Salmonella efflux pumps...
November 22, 2016: MBio
https://www.readbyqxmd.com/read/27879076/drug-survival-rates-and-reasons-for-drug-discontinuation-in-psoriasis
#7
Tobias Arnold, Marthe-Lisa Schaarschmidt, Raphael Herr, Joachim E Fischer, Sergij Goerdt, Wiebke K Peitsch
BACKGROUND AND OBJECTIVES: Moderate-to-severe psoriasis frequently requires long-term systemic therapy. Reflecting efficacy, safety, and treatment satisfaction, drug survival is an indicator of therapeutic success. The objective of the present study was to assess drug survival rates and reasons for discontinuation of fumaric acid esters (FAE), methotrexate (MTX), acitretin (ACI), cyclosporine A (CyA), adalimumab (ADA), etanercept (ETA), infliximab (INF), and ustekinumab (UST) in patients with moderate-to-severe psoriasis...
November 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/27879071/-drug-survival-raten-und-gr%C3%A3-nde-f%C3%A3-r-den-abbruch-von-systemtherapien-bei-psoriasis
#8
Tobias Arnold, Marthe-Lisa Schaarschmidt, Raphael Herr, Joachim E Fischer, Sergij Goerdt, Wiebke K Peitsch
HINTERGRUND UND ZIELE: Mittelschwere bis schwere Psoriasis erfordert häufig eine langfristige systemische Behandlung. Die Therapietreue bezüglich eines Medika-ments (Überlebensrate, "Drug Survival") reflektiert dessen Wirksamkeit, Sicherheit sowie die Zufriedenheit mit der Behandlung und ist ein Indikator für den Therapieerfolg. Das Ziel der vorliegenden Studie was die Ermittlung der "Drug-Survival"-Raten sowie der Gründe für den Abbruch einer Behandlung mit Fumarsäureestern (fumaric acid esters, FAE), Methotrexat (MTX), Acitretin (ACI), Cyclosporin A (CyA), Adalimumab (ADA), Etanercept (ETA), Infliximab (INF) und Ustekinumab (UST) bei Patienten mit mittelschwerer bis schwerer Psoriasis...
November 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/27874251/simultaneous-analysis-of-ten-low-molecular-mass-organic-acids-in-the-tricarboxylic-acid-cycle-and-photorespiration-pathway-in-thalassiosira-pseudonana-at-different-growth-stages
#9
Mengwei Ye, Lijing Zhang, Panpan Xu, Runtao Zhang, Jilin Xu, Xiaokai Wu, Juanjuan Chen, Chengxu Zhou, Xiaojun Yan
A method using high-performance liquid chromatography coupled with tandem mass spectrometry was developed for simultaneous determination of organic acids in microalgae. o-Benzylhydroxylamine was used to derivatize the analytes, and stable isotope-labeled compounds were used as internal standards for precise quantification. The proposed method was evaluated in terms of linearity, recovery, matrix effect, sensitivity, and precision. Linear calibration curves with correlation coefficients of >0.99 were obtained over the concentration range of 0...
November 22, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27853460/pre-sowing-seed-treatment-with-24-epibrassinolide-ameliorates-pesticide-stress-in-brassica-juncea-l-through-the-modulation-of-stress-markers
#10
Anket Sharma, Sharad Thakur, Vinod Kumar, Mukesh K Kanwar, Anup K Kesavan, Ashwani K Thukral, Renu Bhardwaj, Pravej Alam, Parvaiz Ahmad
The present experiment was designed to assess the effects of seed soaking with 24-epibrassinolide (EBR) on the physiology of Brassica juncea L. seedlings grown under imidacloprid (IMI) toxicity. Application of EBR increased the length of seedlings, dry weight, and pigment contents, polyphenols, total phenols, and organic acids under IMI toxicity. The expression of genes coding key enzymes of pigment, phenols, polyphenols, and organic acid biosynthetic pathways was also studied including CHLASE (chlorophyllase), PSY (phytoene synthase), CHS (chalcone synthase) and PAL (phenylalanine ammonialyase), CS (citrate synthase), SUCLG1 (succinyl Co-A ligase,), SDH (succinate dehydrogenase), FH (fumarate hydratase), MS (malate synthase)...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27851770/direct-stimulation-of-islet-insulin-secretion-by-glycolytic-and-mitochondrial-metabolites-in-kcl-depolarized-islets
#11
Javier Pizarro-Delgado, Jude T Deeney, Barbara E Corkey, Jorge Tamarit-Rodriguez
We have previously demonstrated that islet depolarization with 70 mM KCl opens Cx36 hemichannels and allows diffusion of small metabolites and cofactors through the β-cell plasma membrane. We have investigated in this islet "permeabilized" model whether glycolytic and citric acid cycle intermediates stimulate insulin secretion and how it correlates with ATP production (islet content plus extracellular nucleotide accumulation). Glycolytic intermediates (10 mM) stimulated insulin secretion and ATP production similarly...
2016: PloS One
https://www.readbyqxmd.com/read/27829073/%C3%AE-aminopropionitrile-induced-reduction-in-enzymatic-crosslinking-causes-in-vitro-changes-in-collagen-morphology-and-molecular-composition
#12
Silvia P Canelón, Joseph M Wallace
Type I collagen morphology can be characterized using fibril D-spacing, a metric which describes the periodicity of repeating bands of gap and overlap regions of collagen molecules arranged into collagen fibrils. This fibrillar structure is stabilized by enzymatic crosslinks initiated by lysyl oxidase (LOX), a step which can be disrupted using β-aminopropionitrile (BAPN). Murine in vivo studies have confirmed effects of BAPN on collagen nanostructure and the objective of this study was to evaluate the mechanism of these effects in vitro by measuring D-spacing, evaluating the ratio of mature to immature crosslinks, and quantifying gene expression of type I collagen and LOX...
2016: PloS One
https://www.readbyqxmd.com/read/27827839/the-compositional-hj-biplot-a-new-approach-to-identifying-the-links-among-bioactive-compounds-of-tomatoes
#13
Marcos Hernández Suárez, Daniel Molina Pérez, Elena M Rodríguez-Rodríguez, Carlos Díaz Romero, Francisco Espinosa Borreguero, Purificación Galindo-Villardón
Tomatoes have been described as a functional food because of their particular composition of different bioactive compounds. In this study, the proximate composition, minerals and trace elements, and antioxidant compounds were determined in two tomato cultivars (Mariana and Dunkan) that were grown in Gran Canaria (Spain) either conventionally or hydroponically. Although compositional data of this type require being subjected to the specific statistical techniques of compositional analysis, this approach has not usually been considered in this context...
November 2, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27825399/fluctuations-in-metabolite-content-in-the-liver-of-magnesium-deficient-rats
#14
Mei Shigematsu, Ryosuke Nakagawa, Shozo Tomonaga, Masayuki Funaba, Tohru Matsui
Mg deficiency induces various metabolic disturbances including glucose metabolism in the liver. However, no comprehensive information is currently available on the metabolic pathways affected by Mg deficiency. The present study examined metabolite content in the liver of Mg-deficient rats using a metabolomic analysis. In this study, 4-week-old, male Sprague-Dawley rats were fed a control diet or a Mg-deficient diet for 8 weeks. The metabolomic analysis identified 105 metabolites in the liver, and significant differences were observed in the hepatic contents for thirty-three metabolites between the two groups...
November 9, 2016: British Journal of Nutrition
https://www.readbyqxmd.com/read/27819376/cascade-oxime-formation-cyclization-to-a-nitrone-and-intermolecular-dipolar-cycloaddition
#15
Rachel C Furnival, Rungroj Saruengkhanphasit, Heather E Holberry, Jonathan R Shewring, Hélène D S Guerrand, Harry Adams, Iain Coldham
Simple haloaldehydes, including enolisable aldehydes, were found to be suitable for the formation of cyclic products by cascade (domino) condensation, cyclisation, dipolar cycloaddition chemistry. This multi-component reaction approach to heterocyclic compounds was explored by using hydroxylamine, a selection of aldehydes, and a selection of activated dipolarophiles. Initial condensation gives intermediate oximes that undergo cyclisation with displacement of halide to give intermediate nitrones; these nitrones undergo in situ intermolecular dipolar cycloaddition reactions to give isoxazolidines...
November 7, 2016: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/27808569/the-preparation-and-evaluation-of-salt-forms-of-linogliride-with-reduced-solubilities-as-candidates-for-extended-release
#16
Frank A Chrzanowski, Kaleem Ahmad
Salts of linogliride with reduced solubilities were prepared and evaluated as potential candidates for extended-release oral dosage forms. A once-daily dose of 300-800 mg was intended. Seven acids were selected: p-acetamidobenzoic, benzoic, p-hydroxybenzoic, 3-hydroxy-2-naphthoic, 1-napsylic, pamoic, and p-toluenesulfonic acids but only four salts were able to be prepared in suitable quantities for evaluation: linogliride pamoate, p-hydroxybenzoate, 3-hydroxy-2-naphthoate, and 1-napsylate. The pH-solubility profiles of the four new salts, free base, and fumarate salt were compared over the pH 1...
November 21, 2016: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/27801909/genome-of-ca-desulfovibrio-trichonymphae-an-h2-oxidizing-bacterium-in-a-tripartite-symbiotic-system-within-a-protist-cell-in-the-termite-gut
#17
Hirokazu Kuwahara, Masahiro Yuki, Kazuki Izawa, Moriya Ohkuma, Yuichi Hongoh
The cellulolytic protist Trichonympha agilis in the termite gut permanently hosts two symbiotic bacteria, 'Candidatus Endomicrobium trichonymphae' and 'Candidatus Desulfovibrio trichonymphae'. The former is an intracellular symbiont, and the latter is almost intracellular but still connected to the outside via a small pore. The complete genome of 'Ca. Endomicrobium trichonymphae' has previously been reported, and we here present the complete genome of 'Ca. Desulfovibrio trichonymphae'. The genome is small (1 410 056 bp), has many pseudogenes, and retains biosynthetic pathways for various amino acids and cofactors, which are partially complementary to those of 'Ca...
November 1, 2016: ISME Journal
https://www.readbyqxmd.com/read/27801550/herring-and-chicken-pork-meals-lead-to-differences-in-plasma-levels-of-tca-intermediates-and-arginine-metabolites-in-overweight-and-obese-men-and-women
#18
Andrew Vincent, Otto I Savolainen, Partho Sen, Nils-Gunnar Carlsson, Annette Almgren, Helen Lindqvist, Mads Vendelbo Lind, Ingrid Undeland, Ann-Sofie Sandberg, Alastair B Ross
SCOPE: What effect does replacing chicken or pork with herring as the main dietary source of protein have on the human plasma metabolome. METHOD AND RESULTS: A randomized crossover trial with fifteen healthy obese men and women (age 24-70 years). Subjects were randomly assigned to four weeks of herring diet or a reference diet of chicken and lean pork, five meals per week, followed by a washout and the other intervention arm. Fasting blood serum metabolites were analysed at 0, 2 and 4 weeks for eleven subjects with available samples, using GC-MS based metabolomics...
November 1, 2016: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/27790753/renal-dysfunction-in-patients-taking-fumaric-acid-esters-a-retrospective-cross-sectional-study
#19
S Menzies, N Ismail, A Abdalla, P Collins, B Kirby, J Holian, A Lally
BACKGROUND: Fumaric acid esters (FAE) have been used for over 30 years in the management of psoriasis. There have been a number of case reports linking the use of FAE with nephrotoxicity, including acute renal injury and Fanconi syndrome. However, one large multicentre retrospective trial showed no evidence of renal dysfunction with FAE. OBJECTIVES/AIMS: The aim of this study was to determine the number of patients in our institution being treated with FAE who developed significant proteinuria or renal dysfunction...
October 28, 2016: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/27782384/use-of-ion-chromatography-mass-spectrometry-for-targeted-metabolite-profiling-of-polar-organic-acids
#20
Chris Petucci, Andrew Zelenin, Jeffrey A Culver, Meghan Gabriel, Ken Kirkbride, Terri T Christison, Stephen J Gardell
Organic acids (OAs) serve as metabolites that play pivotal roles in a host of different metabolic and regulatory pathways. The polar nature of many OAs poses a challenge to their measurement using widely-practiced analytical methods. In this study, a targeted metabolomics method was developed using ion chromatography/triple quadrupole mass spectrometry (IC/MS) to quantitate 28 polar OAs with limits of quantitation ranging from 0.25-50 µM. The inter-day assay precisions ranged from 1-19%, with accuracies ranging from 82 to 115%...
October 26, 2016: Analytical Chemistry
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