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alternative oxidase

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https://www.readbyqxmd.com/read/28331194/post-treatment-with-ma-huang-tang-ameliorates-cold-warm-cycles-induced-rat-lung-injury
#1
Meng-Meng Xiao, Chun-Shui Pan, Yu-Ying Liu, Li-Qian Ma, Li Yan, Jing-Yu Fan, Chuan-She Wang, Rong Huang, Jing-Yan Han
Frequent and drastic ambient temperature variation may cause respiratory diseases such as common cold and pneumonia, the mechanism for which is not fully understood, however, due to lack of appropriate animal models. Ma-Huang-Tang (MHT) is widely used in China for treatment of respiratory diseases. The present study aimed to investigate the effect of MHT on temperature alternation induced rat lung injury and explore underlying mechanisms. Male Sprague-Dawley rats were exposed to a cold environment for 1 h and then shifted to a warm environment for 30 min...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28287132/crispr-cas9-generated-p47-phox-deficient-cell-line-for-chronic-granulomatous-disease-gene-therapy-vector-development
#2
Dominik Wrona, Ulrich Siler, Janine Reichenbach
Development of gene therapy vectors requires cellular models reflecting the genetic background of a disease thus allowing for robust preclinical vector testing. For human p47(phox)-deficient chronic granulomatous disease (CGD) vector testing we generated a cellular model using clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 to introduce a GT-dinucleotide deletion (ΔGT) mutation in p47(phox) encoding NCF1 gene in the human acute myeloid leukemia PLB-985 cell line. CGD is a group of hereditary immunodeficiencies characterized by impaired respiratory burst activity in phagocytes due to a defective phagocytic nicotinamide adenine dinucleotide phosphate (NADPH) oxidase...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28273139/the-mitochondrial-alternative-oxidase-aox1-is-needed-to-cope-with-respiratory-stress-but-dispensable-for-pathogenic-development-in-ustilago-maydis
#3
Christian A Cárdenas-Monroy, Thomas Pohlmann, Gabriela Piñón-Zárate, Genaro Matus-Ortega, Guadalupe Guerra, Michael Feldbrügge, Juan Pablo Pardo
The mitochondrial alternative oxidase is an important enzyme that allows respiratory activity and the functioning of the Krebs cycle upon disturbance of the respiration chain. It works as a security valve in transferring excessive electrons to oxygen, thereby preventing potential damage by the generation of harmful radicals. A clear biological function, besides the stress response, has so far convincingly only been shown for plants that use the alternative oxidase to generate heat to distribute volatiles. In fungi it was described that the alternative oxidase is needed for pathogenicity...
2017: PloS One
https://www.readbyqxmd.com/read/28247236/the-ancestors-of-diatoms-evolved-a-unique-mitochondrial-dehydrogenase-to-oxidize-photorespiratory-glycolate
#4
Jessica Schmitz, Nishtala V Srikanth, Meike Hüdig, Gereon Poschmann, Martin J Lercher, Veronica G Maurino
Like other oxygenic photosynthetic organisms, diatoms produce glycolate, a toxic intermediate, as a consequence of the oxygenase activity of Rubisco. Diatoms can remove glycolate through excretion and through oxidation as part of the photorespiratory pathway. The diatom Phaeodactylum tricornutum encodes two proteins suggested to be involved in glycolate metabolism: PtGO1 and PtGO2. We found that these proteins differ substantially from the sequences of experimentally characterized proteins responsible for glycolate oxidation in other species, glycolate oxidase (GOX) and glycolate dehydrogenase...
February 28, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28244246/cobalt-ii-chloride-modifies-the-phenotype-of-macrophage-activation
#5
Mona Kumanto, Erja-Leena Paukkeri, Riina Nieminen, Eeva Moilanen
Cobalt (Co) is vital for cells in trace amounts, but excessive exposure to Co is possible due to surgical devices such as artificial metal-on-metal joints. Cobalt(II) chloride (CoCl2 ) has also been shown to imitate hypoxic conditions in cells by stabilizing the transcription factor hypoxia-inducible factor-1α (HIF-1α). The purpose of the present study was to investigate the possible immunomodulatory action of CoCl2 by investigating its effects on the expression of inflammatory genes in macrophages. The following factors were assessed: inducible nitric oxidase synthase (iNOS), NADPH oxidase 2 (NOX2), interleukin 6 (IL-6), arginase-1 and HIF-1α...
February 28, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28242923/control-of-browning-of-minimally-processed-mangoes-subjected-to-ultraviolet-radiation-pulses
#6
Aline Ellen Duarte de Sousa, Kelem Silva Fonseca, Wilny Karen da Silva Gomes, Ana Priscila Monteiro da Silva, Ebenézer de Oliveira Silva, Rolf Puschmann
The pulsed ultraviolet radiation (UVP) has been used as an alternative strategy for the control of microorganisms in food. However, its application causes the browning of minimally processed fruits and vegetables. In order to control the browning of the 'Tommy Atkins' minimally processed mango and treated with UVP (5.7 J cm(-2)) it was used 1-methylcyclopropene (1-MCP) (0.5 μL L(-1)), an ethylene action blocker in separate stages, comprising five treatments: control, UVP (U), 1-MCP + UVP (M + U), UVP + 1-MCP (U + M) e 1-MCP + UVP + 1-MCP (M + U + M)...
January 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28242713/activation-of-peroxisome-proliferator-activator-receptor-%C3%AE-%C3%AE-improves-endothelial-dysfunction-and-protects-kidney-in-murine-lupus
#7
Miguel Romero, Marta Toral, Iñaki Robles-Vera, Manuel Sánchez, Rosario Jiménez, Francisco O'Valle, Alba Rodriguez-Nogales, Francisco Pérez-Vizcaino, Julio Gálvez, Juan Duarte
Women with systemic lupus erythematosus exhibit a high prevalence of hypertension, endothelial dysfunction, and renal injury. We tested whether GW0742, a peroxisome proliferator activator receptor β/δ (PPARβ/δ) agonist, ameliorates disease activity and cardiovascular complications in a female mouse model of lupus. Thirty-week-old NZBWF1 (lupus) and NZW/LacJ (control) mice were treated with GW0742 or with the PPARβ/δ antagonist GSK0660 plus GW0742 for 5 weeks. Blood pressure, plasma double-stranded DNA autoantibodies and cytokines, nephritis, hepatic opsonins, spleen lymphocyte populations, endothelial function, and vascular oxidative stress were compared in treated and untreated mice...
April 2017: Hypertension
https://www.readbyqxmd.com/read/28235562/urate-oxidase-produced-by-lucilia-sericata-medical-maggots-is-localized-in-malpighian-tubes-and-facilitates-allantoin-production
#8
Andre Baumann, Marisa Skaljac, Rüdiger Lehmann, Andreas Vilcinskas, Zdenӗk Franta
Lucilia sericata maggots are the only species currently approved for maggot debridement therapy (MDT), an alternative treatment for chronic and recalcitrant wounds. Maggots promote wound debridement, disinfection and healing by producing a complex mixture of proteins, peptides and low-molecular-weight compounds in their secretions and excretions, but the individual components are not well characterized at the molecular level. Here we investigated the purine catabolism pathway in L. sericata, focusing on the production of allantoin by Urate Oxidase (UO), which is thought to promote wound healing...
February 22, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28225559/effects-of-an-alternative-oxidase-gene-on-conidia-viability-under-external-stresses-in-monascus-ruber-m7
#9
Yanchun Shao, Qi Li, Youxiang Zhou, Fusheng Chen
Monascus species can produce natural edible pigments and many other bioactive metabolites. In this study, mraox gene (Monascus ruber alternative oxidase) was isolated, sequenced, and replaced in order to investigate the function in resistance of conidia to stressful conditions. The derived protein of the mraox gene consisted of 350 amino acids with a conserved ferritin-like diiron-binding domain at the C-terminus, sharing a high homolog with alternative oxidase proteins in other filamentous fungi. Deletion of mraox gene repressed the conidia germination rate (CGR) when conidia were exposed to H2 O2 , high temperature (40 and 50 °C) and alkerline buffer (pH8...
February 22, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28196686/starch-enhanced-degradation-of-hmw-pahs-by-fusarium-sp-in-an-aged-polluted-soil-from-a-coal-mining-area
#10
Ou-Ya Zhao, Xue-Na Zhang, Sheng-Dong Feng, Li-Xiu Zhang, Wei Shi, Zhi-Xin Yang, Miao-Miao Chena, Xue-Dan Fanga
The present study used strain ZH-H2 (Fusarium sp.) isolated by our group as the PAH-degrading strain and 5-6-rings PAHs as degradation objects. The soil incubation experiment was carried out to investigate the starch-enhanced degradation effects of HMW PAHs by Fusarium sp. in an Aged Polluted Soil from a Coal Mining Area. The results showed that the removal rates of BaP, InP and BghiP increased with increasing inoculation rate of ZH-H2 in the unsterile aged polluted soil of coal mining area, with the exception of BbF degradation which increased in the H2 treatment and then decreased...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28194937/encapsulating-therapeutic-proteins-with-polyzwitterions-for-lower-macrophage-nonspecific-uptake-and-longer-circulation-time
#11
Xiaopei Zhang, Wei Chen, Xinyuan Zhu, Yunfeng Lu
Numerous efforts have been made to promote the efficiency of protein delivery through tuning the protein surface properties such as grafting polymers on protein surface, but limited successes have been achieved, and their great clinical expectation has not yet been realized. The main reason is that proteins are readily recognized as foreign materials under physiological conditions due to the genetic distance between species, leading to rapid decrease in activity and clearance by mononuclear phagocyte system...
February 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28193534/implementation-of-new-tools-in-molecular-epidemiology-studies-of-echinococcus-granulosus-sensu-lato-in-south-america
#12
Héctor G Avila, Guilherme B Santos, Marcela A Cucher, Natalia Macchiaroli, Matías G Pérez, Germán Baldi, Oscar Jensen, Verónica Pérez, Raúl López, Perla Negro, Exequiel Scialfa, Arnaldo Zaha, Henrique B Ferreira, Mara Rosenzvit, Laura Kamenetzky
The aim of this work was to determine Echinococcus granulosus sensu lato species and genotypes in intermediate and definitive hosts and in human isolates from endemic regions of Argentina and Brazil including those where no molecular data is available by a combination of classical and alternative molecular tools. A total of 227 samples were isolated from humans, natural intermediate and definitive hosts. Amplification of cytochrome c oxidase subunit I gene fragment was performed and a combination of AluI digestion assay, High Resolution Melting analysis (HRM) assay and DNA sequencing was implemented for Echinococcus species/genotype determination...
February 11, 2017: Parasitology International
https://www.readbyqxmd.com/read/28181110/electron-transport-chain-in-a-thermotolerant-yeast
#13
Jorge A Mejía-Barajas, José A Martínez-Mora, Rafael Salgado-Garciglia, Ruth Noriega-Cisneros, Omar Ortiz-Avila, Christian Cortés-Rojo, Alfredo Saavedra-Molina
Yeasts capable of growing and surviving at high temperatures are regarded as thermotolerant. For appropriate functioning of cellular processes and cell survival, the maintenance of an optimal redox state is critical of reducing and oxidizing species. We studied mitochondrial functions of the thermotolerant Kluyveromyces marxianus SLP1 and the mesophilic OFF1 yeasts, through the evaluation of its mitochondrial membrane potential (ΔΨm), ATPase activity, electron transport chain (ETC) activities, alternative oxidase activity, lipid peroxidation...
February 8, 2017: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/28177769/a-deletion-variant-partially-complements-a-porin-less-strain-of-i-neurospora-crassa-i
#14
Fraser G Ferens, Victor Spicer, Oleg V Krokhin, Anna Motnenko, William A T Summers, Deborah A Court
Mitochondrial porin, the voltage-dependent anion channel, plays an important role in metabolism and other cellular functions within eukaryotic cells. To further the understanding of porin structure and function, <i>Neurospora crassa</i> wild-type porin was replaced with a deletion variant lacking residues 238-242 (238porin). 238porin was assembled in the mitochondrial outer membrane, but the steady state levels were only about 3% of those of the wild-type protein. The strain harbouring 238porin displayed cytochrome deficiencies and expressed alternative oxidase...
November 2, 2016: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28167700/the-transcription-factor-myb29-is-a-regulator-of-alternative-oxidase1a
#15
Xinhua Zhang, Aneta Ivanova, Klaas Vandepoele, Jordan Radomiljac, Jan Van de Velde, Oliver Berkowitz, Patrick Willems, Yue Xu, Sophia Ng, Olivier Van Aken, Owen Duncan, Botao Zhang, Veronique Storme, Kai Xun Chan, Dries Vaneechoutte, Barry James Pogson, Frank Van Breusegem, James Whelan, Inge De Clercq
Plants sense and integrate a variety of signals from the environment through different interacting signal transduction pathways that involve hormones and signaling molecules. Using ALTERNATIVE OXIDASE1a (AOX1a) gene expression as a model system of retrograde or stress signaling between mitochondria and the nucleus, MYB DOMAIN PROTEIN29 (MYB29) was identified as a negative regulator (regulator of alternative oxidase1a 7 [rao7] mutant) in a genetic screen of Arabidopsis (Arabidopsis thaliana). rao7/myb29 mutants have increased levels of AOX1a transcript and protein compared to wild type after induction with antimycin A...
March 2017: Plant Physiology
https://www.readbyqxmd.com/read/28167366/a-stretchable-and-screen-printed-electrochemical-sensor-for-glucose-determination-in-human-perspiration
#16
A Abellán-Llobregat, Itthipon Jeerapan, A Bandodkar, L Vidal, A Canals, J Wang, E Morallón
Here we present two types of all-printable, highly stretchable, and inexpensive devices based on platinum (Pt)-decorated graphite for glucose determination in physiological fluids. Said devices are: a non-enzymatic sensor and an enzymatic biosensor, the latter showing promising results. Glucose has been quantified by measuring hydrogen peroxide (H2O2) reduction by chronoamperometry at -0.35V (vs pseudo-Ag/AgCl) using glucose oxidase immobilized on Pt-decorated graphite. The sensor performs well for the quantification of glucose in phosphate buffer solution (0...
May 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28150747/methanol-independent-protein-expression-by-aox1-promoter-with-trans-acting-elements-engineering-and-glucose-glycerol-shift-induction-in-pichia-pastoris
#17
Jinjia Wang, Xiaolong Wang, Lei Shi, Fei Qi, Ping Zhang, Yuanxing Zhang, Xiangshan Zhou, Zhiwei Song, Menghao Cai
The alcohol oxidase 1 promoter (PAOX1) of Pichia pastoris is commonly used for high level expression of recombinant proteins. While the safety risk of methanol and tough process control for methanol induction usually cause problems especially in large-scale fermentation. By testing the functions of trans-acting elements of PAOX1 and combinatorially engineering of them, we successfully constructed a methanol-free PAOX1 start-up strain, in which, three transcription repressors were identified and deleted and, one transcription activator were overexpressed...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28140693/pharmacokinetic-drug-evaluation-of-tedizolid-for-the-treatment-of-skin-infections
#18
REVIEW
Darrell McBride, Tamara Krekel, Kevin Hsueh, Michael J Durkin
Tedizolid is indicated for the treatment of acute bacterial skin and skin structure infections (ABSSSI). Although tedizolid shares many similar properties with linezolid, another oxazolidinone used to treat ABSSSI, the two antibiotics have several key differences. Areas covered: This review provides a detailed summary of the overall pharmacodynamics, pharmacokinetics, clinical efficacy, and safety of tedizolid for the treatment of ABSSSI. Expert opinion: Compared to other antibiotics used for ABSSSI, tedizolid has several advantages...
March 2017: Expert Opinion on Drug Metabolism & Toxicology
https://www.readbyqxmd.com/read/28117762/composite-hydrogels-with-engineered-microdomains-for-optical-glucose-sensing-at-low-oxygen-conditions
#19
Lindsey R Bornhoeft, Aniket Biswas, Michael J McShane
There is a growing need for advanced tools that enable frequent monitoring of biomarkers for precision medicine. In this work, we present a composite hydrogel-based system providing real-time optical bioanalyte monitoring. The responsive material, alginate-in-alginate (AnA), is comprised of an alginate hydrogel with embedded bioactive, nanofilm-coated phosphorescent microdomains; palladium tetracarboxyphenylporphyrin serves as an optical indicator, glucose oxidase as a model enzyme, and layer-by-layer deposited polyelectrolyte multilayers (PEMs) as the diffusion barrier...
January 22, 2017: Biosensors
https://www.readbyqxmd.com/read/28112515/conjugates-of-2-4-dihydroxybenzoate-and-salicylhydroxamate-and-lipocations-display-potent-antiparasite-effects-by-efficiently-targeting-the-trypanosoma-brucei-and-trypanosoma-congolense-mitochondrion
#20
Francisco José Fueyo González, Godwin U Ebiloma, Carolina Izquierdo García, Victor Bruggeman, José María Sánchez Villamañán, Anne Donachie, Emmanuel Oluwadare Balogun, Daniel Ken Inaoka, Tomoo Shiba, Shigeharu Harada, Kiyoshi Kita, Harry P de Koning, Christophe Dardonville
We investigated a chemical strategy to boost the trypanocidal activity of 2,4-dihydroxybenzoic acid (2,4-DHBA)- and salicylhydroxamic acid (SHAM)-based trypanocides with triphenylphosphonium and quinolinium lipophilic cations (LC). Three series of LC conjugates were synthesized that were active in the submicromolar (5a-d and 10d-f) to low nanomolar (6a-f) range against wild-type and multidrug resistant strains of African trypanosomes (Trypanosoma brucei brucei and T. congolense). This represented an improvement in trypanocidal potency of at least 200-fold, and up to >10 000-fold, compared with that of non-LC-coupled parent compounds 2,4-DHBA and SHAM...
February 9, 2017: Journal of Medicinal Chemistry
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