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https://www.readbyqxmd.com/read/28716098/awakening-sleeping-beauty-production-of-propionic-acid-in-escherichia-coli-through-the-sbm-operon-requires-the-activity-of-a-methylmalonyl-coa-epimerase
#1
Ricardo Axayacatl Gonzalez-Garcia, Tim McCubbin, Annalena Wille, Manuel Plan, Lars Keld Nielsen, Esteban Marcellin
BACKGROUND: Propionic acid is used primarily as a food preservative with smaller applications as a chemical building block for the production of many products including fabrics, cosmetics, drugs, and plastics. Biological production using propionibacteria would be competitive against chemical production through hydrocarboxylation of ethylene if native producers could be engineered to reach near-theoretical yield and good productivity. Unfortunately, engineering propionibacteria has proven very challenging...
July 17, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28714397/prognostic-value-of-copeptin-in-chronic-kidney-disease-from-general-population-to-end-stage-renal-disease
#2
Edyta Golembiewska, Anna Machowska, Peter Stenvinkel, Bengt Lindholm
Arginine vasopressin (AVP), also known as antidiuretic hormone (ADH), is released in response to osmotic and non-osmotic stimuli and plays a key role in many physiologic and pathologic processes. The main function of AVP is the control of fluid homeostasis by inducing water conservation by the kidney, but it also stimulates arteriolar vasoconstriction and the release of adrenocorticotropic hormone (ACTH). These actions are mediated by different AVP receptors located on various target cells. Produced in hypothalamus from a larger precursor, pre-proAVP, AVP is produced in equimolar amounts to copeptin, a glycopeptide with yet unknown biologic function...
July 14, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28711978/the-activity-of-the-antioxidant-defense-system-of-the-weed-species-senna-obtusifolia-l-and-its-resistance-to-allelochemical-stress
#3
Érica Marusa Pergo Coelho, Mauro Cezar Barbosa, Márcio Shigueaki Mito, Gislaine Cristiane Mantovanelli, Rubem Silvério Oliveira, Emy Luiza Ishii-Iwamoto
Senna obtusifolia L., a common weed in the tropical and subtropical regions of the world, is able to germinate under adverse environmental conditions, suggesting that this species has efficient stress-adaptation strategies. The aims of the present work were to examine the energy metabolism and the antioxidant defense system of the Senna obtusifolia L. during seed germination and initial growth, and the responses to allelochemical-induced stress. Respiratory activity, the activities of alcohol dehydrogenase (ADH), superoxide dismutase (SOD), catalase (CAT),guaicol peroxidase (POD), ascorbate peroxidase (APX), glutathione reductase (GR), lipoxygenase (LOX) and the content of malondialdehyde (MDA) and glutathione (GSSG and GSH) were measured...
July 15, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28688179/resveratrol-attenuates-excessive-ethanol-exposure-induced-insulin-resistance-in-rats-via-improving-nad-nadh-ratio
#4
Gang Luo, Bingqing Huang, Xiang Qiu, Lin Xiao, Ning Wang, Qin Gao, Wei Yang, Liping Hao
SCOPE: Resveratrol has been shown to improve insulin resistance via activating the NAD(+) -dependent deacetylase SIRT1, but the effects of resveratrol on ethanol-induced insulin resistance remain unclear. This study was designed to explore the potential mechanism by which resveratrol ameliorated ethanol-induced insulin resistance, focusing on its regulations on the ratio of NAD(+) /NADH and SIRT1 expression. METHODS AND RESULTS: Male Sprague-Dawley rats were fed either control or ethanol liquid diets containing 0...
July 8, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28687785/seed-pelleting-with-calcium-peroxide-improves-crop-establishment-of-direct-seeded-rice-under-waterlogging-conditions
#5
Junhao Mei, Weiqin Wang, Shaobing Peng, Lixiao Nie
Poor crop establishment of direct-seeded rice (DSR) is one of the major constraints to wide adoption of DSR, particularly in areas prone to flooding after sowing or where fields are not level. Seed pelleting is an effective, practical and facile technique to enhance crop establishment under unfavorable environmental conditions. To evaluate the effects of seed pelleting on rice germination, seedling growth and associated metabolic events under waterlogging stress, various seed pelleting treatments including formulae, pelleting times (the weight ratio of pelleting agents: rice seeds = 1:1~7:1 (w/w) and CaO2 contents were tested in series of experiments...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28683414/bioanode-with-alcohol-dehydrogenase-undergoing-a-direct-electron-transfer-on-functionalized-gold-nanoparticles-for-an-application-in-biofuel-cells-for-glycerol-conversion
#6
D Ratautas, L Tetianec, L Marcinkevičienė, R Meškys, J Kulys
In this paper we designed and investigated bioanode with alcohol dehydrogenase (ADH) catalysing oxidation of glycerol and glyceraldehyde. The most effective bioanode was fabricated when ADH was immobilized on gold nanoparticles (AuNPs) modified with 4-aminothiophenol. This electrode catalysed the oxidation of both glycerol and glyceraldehyde thus demonstrating a consecutive two-step process. The bioanode generated the current density of 510µAcm(-2) at pH 7.0 and 0V vs. SCE. It was demonstrated that the electrode acted effectively due to the direct electron exchange between heme of ADH and modified AuNPs...
June 27, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28682868/mineralocorticoid-responsive-hyponatremia-of-the-elderly-a-systematic-review
#7
Kohta Katayama, Yasuharu Tokuda
BACKGROUND: Mineralocorticoid responsive hyponatremia of the elderly (MRHE) is an emerging concept of hyponatremia in aged people. Diagnosis of MRHE requires exclusion of syndrome of inappropriate antidiuresis and adrenal dysfunction. Thus we aimed to evaluate the characteristics of all patients with suspected MRHE available for a review. METHODS: We conducted a systematic review using MEDLINE and Google scholar. We included published case reports of adult patients diagnosed as MRHE, written by English and Japanese language...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28681865/enzyme-activity-evaluation-by-differential-electrochemical-mass-spectrometry
#8
João C P de Souza, Wanderson O Silva, Fabio H B Lima, Frank N Crespilho
NAD-dependent alcohol dehydrogenase (ADH) enzymes for ethanol oxidation were investigated by differential electrochemical mass spectrometry (DEMS). The broad mass spectra obtained under bioelectrochemical control and with unprecedented accuracy were used to provide new insight into the enzyme kinetics and mechanisms.
July 6, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28671678/molecular-basis-of-the-evolution-of-alternative-tyrosine-biosynthetic-routes-in-plants
#9
Craig A Schenck, Cynthia K Holland, Matthew R Schneider, Yusen Men, Soon Goo Lee, Joseph M Jez, Hiroshi A Maeda
L-Tyrosine (Tyr) is essential for protein synthesis and is a precursor of numerous specialized metabolites crucial for plant and human health. Tyr can be synthesized via two alternative routes by different key regulatory TyrA family enzymes, prephenate dehydrogenase (PDH, also known as TyrAp) or arogenate dehydrogenase (ADH, also known as TyrAa), representing a unique divergence of primary metabolic pathways. The molecular foundation underlying the evolution of these alternative Tyr pathways is currently unknown...
June 26, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28671344/direct-alkylation-of-amines-with-primary-and-secondary-alcohols-via-biocatalytic-hydrogen-borrowing
#10
Nicholas John Turner, Sarah Montgomery, Juan Mangas-Sanchez, Matthew Thompson, Godwin Aleku, Beatriz Dominguez
The reductive aminase from Aspergillus oryzae (AspRedAm) has been combined with a single alcohol dehydrogenase (either metagenomic ADH-150, an ADH from Sphingobium yanoikuyae (SyADH), or a variant of the ADH from Thermoanaerobacter ethanolicus (TeSADH W110A)) in a redox-neutral cascade for the biocatalytic alkylation of amines using primary and secondary alcohols. Aliphatic and aromatic secondary amines have been obtained in up to 99% conversion, as well as chiral amines directly from the racemic alcohol precursors in up to >97% ee, releasing water as the only by-product...
July 3, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28668843/the-diagnostic-significance-of-serum-alcohol-dehydrogenase-isoenzymes-and-aldehyde-dehydrogenase-activity-in-urinary-bladder-cancer-patients
#11
Karolina Orywal, Wojciech Jelski, Tadeusz Werel, Maciej Szmitkowski
BACKGROUND: The aim of this study was to investigate a potential role of alcohol dehydrogenase and aldehyde dehydrogenase as tumor markers for urinary bladder cancer. MATERIALS AND METHODS: Serum samples were obtained from 41 patients with bladder cancer and 52 healthy individuals. Class III and IV of ADH and total ADH activity were measured by the photometric method. For measurement of class I and II ADH and ALDH activity, the fluorometric method was employed. RESULTS: Significantly higher total activity of ADH was found in sera of both, low-grade and high-grade bladder cancer patients...
July 2017: Anticancer Research
https://www.readbyqxmd.com/read/28667748/combined-catalase-and-adh-inhibition-ameliorates-ethanol-induced-myocardial-dysfunction-despite-causing-oxidative-stress-in-conscious-female-rats
#12
Fanrong Yao, Abdel A Abdel-Rahman
BACKGROUND: Ethanol-evoked oxidative stress, which contributes to myocardial dysfunction in proestrus rats, is mediated by increases in NADPH oxidase activity, malondialdehyde (MDA) and ERK1/2 phosphorylation. Whether these biochemical responses, which are triggered by alcohol-derived acetaldehyde in non-cardiac tissues, occur in proestrus rats' hearts remains unknown. Therefore, we elucidated the roles of alcohol dehydrogenase (ADH), cytochrome P4502E1 (CYP2E1) and catalase, which catalyze alcohol oxidation to acetaldehyde, in these alcohol-evoked biochemical and hemodynamic responses in proestrus rats...
July 1, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28665367/-algorithms-of-the-correction-of-fluid-and-electrolyte-disorders-in-patients-with-severe-ischemic-stroke
#13
V I Ershov, A N Chirkov
AIM: To develop a practical algorithm for the correction of sodium levels and osmolality of blood plasma during the acute period of severe ischemic stroke (IS). MATERIAL AND METHODS: One hundred and fifty patients with cardioembolic or atherothrombotic stroke, aged from 30 to 80 years, hospitalized in the first 12 h after symptom emergence, were examined. Neurological deficit was assessed with the NIHSS. The monitoring of blood plasma sodium level and osmolality of blood plasma in the 1st and 5th day after stroke as well as of blood circulation volume was performed...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28663138/the-ethanol-pathway-from-thermoanaerobacterium-saccharolyticum-improves-ethanol-production-in-clostridium-thermocellum
#14
Shuen Hon, Daniel G Olson, Evert K Holwerda, Anthony A Lanahan, Sean J L Murphy, Marybeth I Maloney, Tianyong Zheng, Beth Papanek, Adam M Guss, Lee R Lynd
Clostridium thermocellum ferments cellulose, is a promising candidate for ethanol production from cellulosic biomass, and has been the focus of studies aimed at improving ethanol yield. Thermoanaerobacterium saccharolyticum ferments hemicellulose, but not cellulose, and has been engineered to produce ethanol at high yield and titer. Recent research has led to the identification of four genes in T. saccharolyticum involved in ethanol production: adhE, nfnA, nfnB and adhA. We introduced these genes into C. thermocellum and observed significant improvements to ethanol yield, titer, and productivity...
June 27, 2017: Metabolic Engineering
https://www.readbyqxmd.com/read/28657425/the-regulatory-network-controlling-ethanol-induced-expression-of-alcohol-dehydrogenase-in-the-endophyte-azoarcus-sp-strain-bh72
#15
Andrea Krause, Henrike Julich, Manasee Mankar, Barbara Reinhold-Hurek
The habitat of the nitrogen-fixing endophyte Azoarcus sp. strain BH72 is grass roots grown under waterlogged conditions which produce under these conditions ethanol. To metabolise ethanol, Azoarcus is with eight alcohol dehydrogenases (ADHs) well equipped, of which ExaA2 and ExaA3 are the most relevant ones. exaA2 and exaA3 are clustered surrounded by genes encoding two-component regulatory systems (TCSs) termed ExaS-ExaR and ElmS-GacA. Functional genomic analyses revealed (1) that expression of the corresponding genes was induced by ethanol, (2) that the genes were also expressed in the rhizoplane or even inside of rice roots, (3) that both TCSs were indispensable for growth on ethanol, and (4) that they were important for competitiveness during rice root colonisation...
June 28, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28655819/functional-role-of-lanthanides-in-enzymatic-activity-and-transcriptional-regulation-of-pyrroloquinoline-quinone-dependent-alcohol-dehydrogenases-in-pseudomonas-putida-kt2440
#16
Matthias Wehrmann, Patrick Billard, Audrey Martin-Meriadec, Asfaw Zegeye, Janosch Klebensberger
The oxidation of alcohols and aldehydes is crucial for detoxification and efficient catabolism of various volatile organic compounds (VOCs). Thus, many Gram-negative bacteria have evolved periplasmic oxidation systems based on pyrroloquinoline quinone-dependent alcohol dehydrogenases (PQQ-ADHs) that are often functionally redundant. Here we report the first description and characterization of a lanthanide-dependent PQQ-ADH (PedH) in a nonmethylotrophic bacterium based on the use of purified enzymes from the soil-dwelling model organism Pseudomonas putida KT2440...
June 27, 2017: MBio
https://www.readbyqxmd.com/read/28652865/crispr-cas9-enabled-genetic-disruptions-for-understanding-ethanol-and-ethyl-acetate-biosynthesis-in-kluyveromyces-marxianus
#17
Ann-Kathrin Löbs, Ronja Engel, Cory Schwartz, Andrew Flores, Ian Wheeldon
BACKGROUND: The thermotolerant yeast Kluyveromyces marxianus shows promise as an industrial host for the biochemical production of fuels and chemicals. Wild-type strains are known to ferment high titers of ethanol and can effectively convert a wide range of C5, C6, and C12 sugars into the volatile short-chain ester ethyl acetate. Strain engineering, however, has been limited due to a lack of advanced genome-editing tools and an incomplete understanding of ester and ethanol biosynthesis...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28650603/psychometric-evaluation-of-the-czech-beck-depression-inventory-ii-in-a-sample-of-depressed-patients-and-healthy-controls
#18
(no author information available yet)
OBJECTIVE: The goal of this study was to explore reliability and validity of the Czech revised Beck Depression Inventory (BDI-II) and to identify the best cut-off for a correct identification of a potentially depressed individual. METHOD: Two groups of adult participants entered the study. The first group consisted of 177 patients with depression (F32x or F33x according to the ICD-10). Furthermore, there were 767 healthy controls. Each participant filled in BDI-II...
May 26, 2017: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28645180/alcohol-metabolism-and-oesophageal-cancer-a-systematic-review-of-the-evidence
#19
Marco Matejcic, M J Gunter, Pietro Ferrari
Alcohol is a major risk factor for oesophageal squamous cell carcinoma (OSCC), the most prevalent histological subtype of oesophageal cancer (OC) worldwide. The metabolism of alcohol is regulated by specific enzymes whose activity and expression is influenced by genetic polymorphisms. We conducted a systematic review of current epidemiological evidence of the relationship between alcohol intake and OC risk, including the role of tobacco smoking and functional polymorphisms of dehydrogenases (ADHs) and aldehyde dehydrogenases (ALDHs)...
June 22, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28642875/rapid-elimination-of-blood-alcohol-using-erythrocytes-mathematical-modeling-and-in-vitro-study
#20
Yuliya G Alexandrovich, Elena A Kosenko, Elena I Sinauridze, Sergey I Obydennyi, Igor I Kireev, Fazoil I Ataullakhanov, Yuriy G Kaminsky
Erythrocytes (RBCs) loaded with alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALD) can metabolize plasma ethanol and acetaldehyde but with low efficiency. We investigated the rate-limiting factors in ethanol oxidation by these enzymes loaded into RBCs. Mathematical modeling and in vitro experiments on human RBCs loaded simultaneously with ADH and ALD (by hypoosmotic dialysis) were performed. The simulation showed that the rate of nicotinamide-adenine dinucleotide (NAD(+)) generation in RBC glycolysis, but not the activities of the loaded enzymes, is the rate-limiting step in external ethanol oxidation...
2017: BioMed Research International
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