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Showing 1-30 of 33 results for "146617" within Papers
Susanna Raho et al.
Nature metabolism, 2(12), 1373-1381 (2020-11-25)
The oncogenic KRAS mutation has a critical role in the initiation of human pancreatic ductal adenocarcinoma (PDAC) since it rewires glutamine metabolism to increase reduced nicotinamide adenine dinucleotide phosphate (NADPH) production, balancing cellular redox homeostasis with macromolecular synthesis1,2. Mitochondrial glutamine-derived
Paul S Francis et al.
Talanta, 82(2), 859-862 (2010-07-07)
Ruthenium complexes containing 4,7-diphenyl-1,10-phenanthroline disulfonate (bathophenanthroline disulfonate; BPS) ligands, Ru(BPS)(3)(4-), Ru(BPS)(2)(bipy)(2-) and Ru(BPS)(bipy)(2), were compared to tris(2,2'-bipyridine)ruthenium(II) (Ru(bipy)(3)(2+)), including examination of the wavelengths of maximum absorption and corrected emission intensity, photoluminescence quantum yield, stability of their oxidised ruthenium(III) form, and
U Eckhardt et al.
Plant molecular biology, 45(4), 437-448 (2001-05-16)
Although iron deficiency poses severe nutritional problems to crop plants, to date iron transporters have only been characterized from the model plant Arabidopsis thaliana. To extend our molecular knowledge of Fe transport in crop plants, we have isolated two cDNAs
Harold G Weger et al.
Physiologia plantarum, 131(2), 322-331 (2008-02-07)
The colorimetric Fe2+ indicators bathophenanthroline disulfonic acid (BPDS) and 3-(2-pyridyl)-5,6-bis(4-phenylsulfonic acid)-1,2,4-triazine (FZ) are routinely used to assay for plasma membrane ferric reductase activity in iron-limited algal cells and also in roots from iron-limited plants. Ferric reductase assays using these colorimetric
M L Calabrò et al.
Journal of pharmaceutical and biomedical analysis, 36(5), 1019-1027 (2004-12-29)
In the present work the feasibility of beta-cyclodextrin complexation was explored, as a tool for improving the aqueous solubility and antioxidant efficacy of rutin. By means of 1H NMR, UV-vis and circular dichroism spectroscopy the single aromatic ring of rutin
Marija Smokvarska et al.
Current biology : CB, 30(23), 4654-4664 (2020-10-10)
In the course of their growth and development, plants have to constantly perceive and react to their environment. This is achieved in cells by the coordination of complex combinatorial signaling networks. However, how signal integration and specificity are achieved in
Kassy A Mies et al.
Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine, 19(2), 115-126 (2006-05-24)
While the naturally occurring reducing agents glutathione (GSH) and ascorbate (H2A) alone are ineffective at reducing iron(III) sequestered by the siderophore ferrioxamine B, the addition of an iron(II) chelator, sulfonated bathophenanthroline (BPDS), facilitates reduction by either reducing agent. A mechanism
J L Wood et al.
Free radical research, 31(5), 367-379 (1999-11-05)
Macrophages oxidize low density lipoprotein (LDL) by enzymatic and non-enzymatic mechanisms; however, it is evident that macrophage reduction of transition metals can accelerate LDL oxidation in vitro, and possibly in vivo. Distinct cellular pathways contribute to this process, including trans-plasma
Piyada Jittangprasert et al.
The Southeast Asian journal of tropical medicine and public health, 35(4), 1039-1044 (2005-05-27)
This paper describes a comparison of two analytical techniques, one employing bathophenanthrolinedisulfonate (BPT), a most commonly-used reagent for Fe (II) determination, as chromogen and an electrothermal atomic absorption spectroscopy (ETAAS) for the quantification of non-transferrin bound iron (NTBI) in sera
Anita C G Chua et al.
Blood, 104(5), 1519-1525 (2004-05-25)
Hereditary hemochromatosis (HH) is an iron-overload disorder caused by a C282Y mutation in the HFE gene. In HH, plasma nontransferrin-bound iron (NTBI) levels are increased and NTBI is bound mainly by citrate. The aim of this study was to examine
Anatoly F Vanin et al.
Nitric oxide : biology and chemistry, 7(3), 194-209 (2002-10-17)
The present experiments were designed to analyze the influence of copper and iron ions on the process of decomposition of S-nitrosocysteine (cysNO), the most labile species among S-nitrosothiols (RSNO). CysNO fate in buffer solution was evaluated by optical and electron
Guiran Xiao et al.
Cell reports, 26(3), 748-758 (2019-01-17)
Iron metabolism is an essential process that when dysregulated causes disease. Mammalian serum transferrin (TF) plays a primary role in delivering iron to cells. To improve our understanding of the conservation of iron metabolism between species, we investigate here the
Marion d C Molina et al.
Biochimica et biophysica acta, 1768(3), 669-677 (2007-01-17)
Oxidation reactions represent an important degradation pathway of nucleic acid-based pharmaceuticals. To evaluate the role of metal contamination and chelating agents in the formation of reactive oxygen species (ROS) during lyophilization, ROS generation and the stability of lipid/DNA complexes were
Junli Jia et al.
Electrophoresis, 33(9-10), 1397-1401 (2012-06-01)
This article reports a new class of luminescent metal complexes, biscyclometalated iridium(III) complexes with an ancillary bathophenanthroline disulfonate ligand, for staining protein bands that are separated by electrophoresis. The performances of these novel staining agents have been studied in comparison
H Li et al.
Free radical biology & medicine, 26(1-2), 49-60 (1999-01-16)
Perturbations to Fe species contributing to generation of DNA single-strand breaks (SSBs) and inhibition of growth by H2O2 were studied in HL-60 cells made Fe-deficient by 24 h pretreatment with 144 microM bathophenanthroline disulfonic acid and 400 microM ascorbic acid
Elizabeth M Zammit et al.
The Analyst, 136(15), 3069-3072 (2011-06-29)
The reaction of a fluorinated iridium complex with cerium(IV) and organic reducing agents generates an intense emission with a significant hypsochromic shift compared to contemporary chemically-initiated luminescence from metal complexes.
K Berger et al.
Molecular and cellular endocrinology, 227(1-2), 21-30 (2004-10-27)
Thyroid tumorigenesis involves qualitative and quantitative changes in protein expression, which can be comprehensively studied by proteome analysis. However, one of the technical bottlenecks of proteomics remains a reliable, sensitive and inexpensive method for quantification of differentially expressed proteins. This
D Trinder et al.
The American journal of physiology, 275(2 Pt 1), G279-G286 (1998-08-04)
The mechanisms of uptake of non-transferrin-bound iron by human hepatoma cells (HuH7) were investigated using 59Fe-citrate and [14C]citrate. The amount of iron associated with the cells increased linearly with time, whereas citrate uptake reached a plateau after 45 min, resulting
Yan-Zhong Chang et al.
Molecular pharmacology, 69(3), 968-974 (2005-12-01)
Based on the available data, we speculated that changes in brain iron metabolism induced by L-DOPA might be associated with the neurotoxicity of L-DOPA. To investigate this possibility, the effects of L-DOPA on the expression of iron influx proteins [transferrin
Sreenivasulu Kilari et al.
Free radical biology & medicine, 48(7), 961-968 (2010-01-26)
Studies in humans and animals have suggested negative interactions of iron and zinc during their intestinal absorption. Further, zinc seems to prevent iron-induced oxidative damage in rats, which was hypothesized to be through the modulation of the intracellular iron signaling
Maria G Ledesma-Colunga et al.
Bone, 137, 115400-115400 (2020-05-08)
Ferroportin (FPN) is the only known iron exporter. Mutations conferring resistance of FPN to hepcidin-mediated degradation cause the iron overload disorder hereditary hemochromatosis type 4. While iron overload is associated with low bone mass, the mechanisms involved are not completely
Intercalation of luminescent Europium (III) complexes in layered double hydroxides.
Sarakha L, et al.
Opt. Mater., 31(3), 562-566 (2009)
Neal K Devaraj et al.
Journal of the American Chemical Society, 128(6), 1794-1795 (2006-02-09)
We demonstrate selective functionalization of independently addressed microelectrodes by electrochemical activation and deactivation of a coupling catalyst. 1,2,3-Triazole formation between terminal acetylenes and organic azides is efficiently catalyzed by copper(I) complexes (a Sharpless "click" reaction), while the oxidized copper(II) complexes
Asa M Wheelock et al.
Proteomics, 6(5), 1385-1398 (2006-01-24)
2-DE is a powerful separation method for complex protein mixtures. However, large intergel variations in spot intensity limit its use for quantitative proteomics studies. To address this issue, we developed a fluorescent internal protein standard for use in 2-DE analysis.
J M May et al.
Biochemical pharmacology, 57(11), 1275-1282 (1999-05-07)
The role of ascorbic acid in transferrin-independent ferric iron reduction and uptake was evaluated in cultured U-937 monocytic cells. Uptake of 55Fe by U-937 cells was doubled by 100 microM extracellular ascorbate, and by pre-incubation of cells with 100 microM
Sant-Rayn Pasricha et al.
Nature communications, 8(1), 403-403 (2017-09-03)
Hepcidin regulates systemic iron homeostasis. Suppression of hepcidin expression occurs physiologically in iron deficiency and increased erythropoiesis but is pathologic in thalassemia and hemochromatosis. Here we show that epigenetic events govern hepcidin expression. Erythropoiesis and iron deficiency suppress hepcidin via
Chenchen Liu et al.
Magnetic resonance in chemistry : MRC, 49(12), 816-823 (2011-11-15)
A series of novel biscyclometalated iridium (III) complexes with an ancillary disulfonated bathophenanthroline (DSBP(2-)) ligand, Ir(L)(2)DSBPNa, L = 2-phenylpyridine (ppy), 2,4-difluorophenylpyridine (fppy), and 1-phenylisoquinoline (piq) were found to have two isomeric forms. The chemical structures of the isomers were determined
A Paolicchi et al.
Journal of investigative medicine : the official publication of the American Federation for Clinical Research, 47(3), 151-160 (1999-04-13)
gamma-Glutamyl transpeptidase (gamma-GT) is found in serum and in the plasma membranes of virtually all cell types. Its physiologic role is to initiate the hydrolysis of extracellular glutathione (GSH), a tripeptide in which cysteine lies between alpha-glycine and gamma-glutamate residues.
Simone Zanarini et al.
The journal of physical chemistry. B, 112(33), 10188-10193 (2008-07-26)
In this work, the electrochemical and ECL properties of tris[1,10-phenanthrolinediyl-4,7-di(benzenesulfonate)]Ru(II) ([Ru(BPS)3]4-) have been addressed in both strictly aprotic conditions and aqueous buffers. A combined theoretical and experimental approach is presented to focus thermodynamics and kinetic effects of electro-generated species possessing
Catalytic Conversions in Water. Part 23: Steric Effects and Increased Substrate Scope in the Palladium-Neocuproine Catalyzed Aerobic Oxidation of Alcohols in Aqueous Solvents#.
Brink GJ, et al.
Advanced Synthesis & Catalysis, 345(12), 1341-1352 (2003)
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