نتایج جستجو برای: name nadph

تعداد نتایج: 182155  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده دامپزشکی 1393

میزان بالای تکثیر و تقسیمات سلولی یکی از شاخص های اصلی تومورهای مختلف است. سلول برای تکثیر خود علاوه بر انرژی به تولید ماکرومولکول های لازم و انتقال آنها به سلول های دختری نیز نیاز دارد. یکی از این ماکرومولکول های مورد نیاز سلول سرطانی، اسید های چرب جهت ساخت غشا های سلول های دختری است و آنزیم مالیک یکی از آنزیم هایی است که با تولید nadph، کوآنزیم احیایی مورد نیاز برای سنتز اسید های چرب را فراهم...

Journal: :Zeitschrift fur Naturforschung. Teil B. Anorganische Chemie, organische Chemie, Biochemie, Biophysik, Biologie 1972
L M Siegel E J Faeder H Kamin

E. coli NADPH-sulfite reductase, depleted of FMN but retaining its FAD, has been prepared by photoirradiation of native enzyme in 30% — saturated ammonium sulfate. FMN-depleted enzyme loses its ability to reduce (using NADPH) ferricyanide, cytochrome c, sulfite, or the enzyme's own heme-like chromophore. However, the FAD remains rapidly reducible by NADPH, and the FMN-depleted enzyme retains NA...

Journal: :Bioorganic & medicinal chemistry 2009
Mauricio Mora-Pale Michel Weïwer Jingjing Yu Robert J Linhardt Jonathan S Dordick

Enzymatic oxidation of apocynin, which may mimic in vivo metabolism, affords a large number of oligomers (apocynin oxidation products, AOP) that inhibit vascular NADPH oxidase. In vitro studies of NADPH oxidase activity were performed to identify active inhibitors, resulting in a trimer hydroxylated quinone (IIIHyQ) that inhibited NADPH oxidase with an IC(50)=31nM. Apocynin itself possessed min...

Journal: :The Journal of biological chemistry 1987
H N Kirkman S Galiano G F Gaetani

Catalase (H2O2:H2O2 oxidoreductase, EC 1.11.1.6) is of historical interest for having been the subject of some of the earliest investigations of enzymes. A feature of catalase that has been poorly understood for several decades, however, is the mechanism by which catalase remains active in the presence of its own substrate, hydrogen peroxide. We reported recently that catalase contains tightly ...

2010
Nik M. Mustapha Joanna M. Tarr Eva M. Kohner Rakesh Chibber

Objectives. Using apocynin (inhibitor of NADPH oxidase), and Mitoquinol 10 nitrate (MitoQ; mitochondrial-targeted antioxidant), we addressed the importance of mitochondria versus NADPH oxidase-derived ROS in glucose-induced apoptosis of pericytes. Methods. NADPH oxidase was localised using Western blot analysis and cytochrome C reduction assay. Apoptosis was detected by measuring caspase-3 acti...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2011
Carlos Schreck Paul M O'Connor

A fundamental requirement for cellular vitality is the maintenance of plasma ion concentration within strict ranges. It is the function of the kidney to match urinary excretion of ions with daily ion intake and nonrenal losses to maintain a stable ionic milieu. NADPH oxidase is a source of reactive oxygen species (ROS) within many cell types, including the transporting renal epithelia. The focu...

Journal: :Prague medical report 2005
B Czéh A Hajnal L Seress

The present study aimed to asses the total number and distribution of the NADPH-diaphorase-positive non-pyramidal neurons in Ammon's horn and dentate gyrus of rat hippocampal formation. Cell bodies were counted according to the "disector" principle. The total numbers varied from 27 000 to 32 400. In all strains, approximately one third of the NADPH-diaphorase-reactive non-principal cells were f...

Journal: :Cell reports 2018
Susan J Gelman Fuad Naser Nathaniel G Mahieu Lisa D McKenzie Gavin P Dunn Milan G Chheda Gary J Patti

Gain-of-function mutations in isocitrate dehydrogenase 1 (IDH1) occur in multiple types of human cancer. Here, we show that these mutations significantly disrupt NADPH homeostasis by consuming NADPH for 2-hydroxyglutarate (2-HG) synthesis. Cells respond to 2-HG synthesis, but not exogenous administration of 2-HG, by increasing pentose phosphate pathway (PPP) flux. We show that 2-HG production c...

2014
Marieke R. Beijer Ronald Backer Ellen G.F. Borg Ayla Kempers Georg Kraal Joke M.M. den Haan

Dendritic cells (DCs) continuously scavenge their environment to capture invading pathogens for presentation to T cells. To increase the antigen presentation potential, DCs are equipped with several mechanisms that reduce antigen degradation. Alkalization of the endosomal and phagosomal compartments by reactive oxygen species (ROS) produced by NADPH oxidases is one of these mechanisms. In neutr...

2005
Kenzo SAWADA Brian C. W. HUMMEL

The effects of cytosol, NADPH and reduced glutathione (GSH) on the activity of 5'-deiodinase were studied by using washed hepatic microsomes from normal fed rats. Cytosol alone had little stimulatory effect on the activation of microsomal 5'-deiodinase. NADPH had no stimulatory effect on the microsomal 5'-deiodinase unless cytosol was added. 5'-deiodinase activity was greatly enhanced by the si...

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