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57400

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Burkhard Poeggeler et al.
PloS one, 5(4), e10206-e10206 (2010-04-28)
Aging is a multi-factorial process, however, it is generally accepted that reactive oxygen species (ROS) are significant contributors. Mitochondria are important players in the aging process because they produce most of the cellular ROS. Despite the strength of the free-radical...
In Koo Hwang et al.
Journal of neuroscience research, 87(9), 2126-2137 (2009-02-25)
Tryptophan-derived indole compounds have been widely investigated as antioxidants and as free-radical scavengers. Indole-3-propionic acid (IPA), one of these compounds, is a deamination product of tryptophan. In the present study, we used Mongolian gerbils to investigate IPA's neuroprotective effects against...
Qian Han et al.
Journal of medicinal chemistry, 52(9), 2786-2793 (2009-04-03)
Human kynurenine aminotransferase I (hKAT I) catalyzes the formation of kynurenic acid, a neuroactive compound. Here, we report three high-resolution crystal structures (1.50-1.55 A) of hKAT I that are in complex with glycerol and each of two inhibitors of hKAT...
Mahmoud Al-Majdoub et al.
Journal of molecular recognition : JMR, 27(9), 566-574 (2014-07-22)
The development and application of a miniaturized affinity system for the preparation and release of intact immune complexes are demonstrated. Antibodies were reversibly affinity-adsorbed on pipette tips containing protein G´ and protein A, respectively. Antigen proteins were digested with proteases...
K L Borden et al.
European journal of biochemistry, 202(2), 459-470 (1991-12-05)
The antirepressor indole 3-propanoate has been shown by X-ray crystallography to bind in a different orientation compared with the natural corepressor for the tryp repressor, L-tryptophan (Lawson, C.L. & Sigler, P. B. (1988) Nature 333, 869-871). This suggests a simple...
Fikadu G Tafesse et al.
PLoS pathogens, 11(10), e1005188-e1005188 (2015-10-03)
The ability of phagocytes to clear pathogens is an essential attribute of the innate immune response. The role of signaling lipid molecules such as phosphoinositides is well established, but the role of membrane sphingolipids in phagocytosis is largely unknown. Using...
Stéphanie Ortial et al.
Journal of medicinal chemistry, 49(9), 2812-2820 (2006-04-28)
The use of classical antioxidants is limited by their low bioavailabilities, and therefore, high doses are usually required to display significant protective activity. In a recent article (J. Med. Chem. 2003, 46, 5230) we showed that the ability of the...
Yao Wang et al.
Journal of hazardous materials, 295, 9-16 (2015-04-13)
In the present study, the enantioselective metabolism, cytotoxicity of hexaconazole and its influence on tryptophan metabolism in rat hepatocytes in vitro were investigated. Following the exposure of primary rat hepatocytes to rac-hexaconazole, the concentrations of its enantiomers in the media...
Małgorzata Karbownik et al.
Cell biochemistry and function, 24(6), 483-489 (2006-01-07)
Potassium bromate (KBrO(3)) is classified as a carcinogenic agent. KBrO(3) induces tumors and pro-oxidative effects in kidneys. Melatonin is a well known antioxidant and free radical scavenger. Indole-3-propionic acid (IPA), an indole substance, also reveals antioxidative properties. Recently, some antioxidative...
R Hardeland et al.
Advances in experimental medicine and biology, 467, 389-395 (2000-03-18)
Chemiluminescence associated with oxidation by free radicals was investigated in an alkaline, hemin-catalysed hydrogen peroxide system, using the following tryptophan metabolites as radical scavengers: indole-3-pyruvic, indole-3-propionic, kynurenic, xanthurenic and quinaldic acids and 4-hydroxy-quinoline. Light emission from oxidation of the indolic...
Andrew W Woodward et al.
Plant physiology, 144(2), 976-987 (2007-04-24)
The ubiquitin-like protein RELATED TO UBIQUITIN (RUB) is conjugated to CULLIN (CUL) proteins to modulate the activity of Skp1-Cullin-F-box (SCF) ubiquitylation complexes. RUB conjugation to specific target proteins is necessary for the development of many organisms, including Arabidopsis (Arabidopsis thaliana)....
Emeline L Maillet et al.
Journal of medicinal chemistry, 52(21), 6931-6935 (2009-10-13)
We show that phenoxyauxin herbicides and lipid-lowering fibrates inhibit human but not rodent T1R3. T1R3 as a coreceptor in taste cells responds to sweet compounds and amino acids; in endocrine cells of gut and pancreas T1R3 contributes to glucose sensing....
M Karbownik et al.
Journal of bioenergetics and biomembranes, 33(1), 73-78 (2001-07-20)
Chromium (Cr) is a well established carcinogen, with Cr(III) accounting for much of the intracellular oxidative damage that this transition metal induces. Indole-3-propionic acid (IPA), a melatonin-related molecule, is a reported antioxidant and free radical scavenger. Concentration (1, 10, 100...
M Karbownik et al.
Journal of cellular biochemistry, 81(3), 507-513 (2001-03-20)
Excessive free iron and the associated oxidative damage are commonly related to carcinogenesis. Among the antioxidants known to protect against iron-induced oxidative abuse and carcinogenesis, melatonin and other indole compounds recently have received considerable attention. Indole-3-propionic acid (IPA), a deamination...
Lihui Wang et al.
Journal of chromatography. A, 1368, 37-43 (2014-12-03)
A new material, graphene oxide/polypyrrole (GO/Ppy), was synthesized by mixing graphene oxide and polypyrrole in a specific proportion. It possesses a unique structure similar to that of foam. A homemade pipette-tip solid-phase extraction (PT-SPE) device, which is more simple and...
Shardulendra P Sherchand et al.
Proceedings of the National Academy of Sciences of the United States of America, 116(25), 12468-12477 (2019-05-18)
A striking difference between genital and ocular clinical isolates of Chlamydia trachomatis is that only the former express a functional tryptophan synthase and therefore can synthesize tryptophan by indole salvage. Ocular isolates uniformly cannot use indole due to inactivating mutations...
B Poeggeler et al.
Brain research, 815(2), 382-388 (1999-01-08)
The hydroxyl radical scavenging activity of indole-3-propionate was evaluated by kinetic competition studies with the hydroxyl radical trapping reagent 2,2'-azino-bis-(3-ethyl-benz-thiazoline-6-sulfonic acid) (ABTS) and by measuring hydroxyl radical-initiated lipid peroxidation in the rat striatum. Using ABTS, the indole was shown to...
Masaaki Fujikawa et al.
Bioorganic & medicinal chemistry, 15(11), 3756-3767 (2007-04-10)
We previously reported a classical quantitative structure-activity relationship (QSAR) equation for permeability coefficients (P(app-pampa)) by parallel artificial membrane permeation assay (PAMPA) of structurally diverse compounds with simple physicochemical parameters, hydrophobicity at a particular pH (logP(oct) and |pK(a)-pH|), hydrogen-accepting ability (SA(HA))...
Shan Wu et al.
Plant science : an international journal of experimental plant biology, 238, 95-104 (2015-08-11)
Within the cultivated tomato germplasm, sun, ovate and fs8.1 are the three predominant QTLs controlling fruit elongation. Although SUN and OVATE have been cloned, their role in plant growth and development are not well understood. To compare and contrast the...
Y J Chyan et al.
The Journal of biological chemistry, 274(31), 21937-21942 (1999-07-27)
Widespread cerebral deposition of a 40-43-amino acid peptide called the amyloid beta-protein (Abeta) in the form of amyloid fibrils is one of the most prominent neuropathologic features of Alzheimer's disease. Numerous studies suggest that Abeta is toxic to neurons by...
Malgorzata Karbownik et al.
Journal of cellular biochemistry, 95(1), 131-138 (2005-02-22)
Potassium bromate (KBrO3) is a prooxidant and carcinogen, inducing thyroid tumors. Melatonin and indole-3-propionic acid (IPA) are effective antioxidants. Some antioxidative effects of propylthiouracil (PTU)--a thyrostatic drug--have been found. The aim of the study was to compare protective effects of...
Rui Weng et al.
Scientific reports, 5, 11864-11864 (2015-07-15)
Serotonin is an important neurotransmitter that broadly participates in various biological processes. While serotonin deficiency has been associated with multiple pathological conditions such as depression, schizophrenia, Alzheimer's disease and Parkinson's disease, the serotonin-dependent mechanisms remain poorly understood. This study therefore...
Stephen E Reichenbach et al.
Journal of separation science, 33(10), 1365-1374 (2010-04-17)
Comprehensive two-dimensional LC (LC x LC) is a powerful tool for analysis of complex biological samples. With its multidimensional separation power and increased peak capacity, LC x LC generates information-rich, but complex, chromatograms, which require advanced data analysis to produce...
E V Soniya et al.
Indian journal of experimental biology, 40(3), 329-333 (2003-03-15)
The effect of growth regulators and culture conditions on the morphogenetic response of cotyledonary leaf discs was studied in popular cucumber variety (Cucumis sativus cv. Sheetal). Organogenesis was induced directly without any intervening callus phase on Murashige and Skoog medium...
F Mandelbaum-Shavit et al.
Antimicrobial agents and chemotherapy, 35(12), 2526-2530 (1991-12-01)
Indole-3-propionic acid (IPA), a phytohormone derivative, is a potent inhibitor of growth of Legionella pneumophila cultivated extracellularly in a chemically defined hypotonic medium and intracellularly in human monocytes. The inhibitory activity turns into bactericidal activity with increasing concentrations. The susceptibility...
M Kavanoor et al.
Biophysical chemistry, 66(1), 43-55 (1997-05-21)
The pH dependence of the association of apo trp repressor with the series of ligands, tryptophan, tryptamine, indole propionic acid (IPA), and trans-beta-indole acrylic acid (IAA), has been studied using fluorescence titrations and isothermal titration microcalorimetry (ITC). The purpose of...
Magdalena Stasiak et al.
Neuro endocrinology letters, 31(3), 363-369 (2010-07-01)
Potassium bromate (KBrO3) is a prooxidant and carcinogen. Melatonin is a highly effective antioxidant. Indole-3-propionic acid (IPA; indole substance) and propylothiouracil (PTU; antithyroid drug) reveal some antioxidative effects. The aim of the study was to evaluate KBrO3-induced lipid peroxidation (LPO)...
W Qi et al.
Journal of pineal research, 29(1), 54-61 (2000-08-19)
Chromium (Cr) compounds are known occupational and environmental carcinogens. This trace element is found in the workplace primarily in the valence forms Cr(III) and Cr(VI). Cr(III), which was thought originally to be relatively nontoxic, was recently found to be more...
Veronica Montesinos-Cruz et al.
Chemical research in toxicology, 33(2), 536-552 (2020-01-14)
Metal-derived nanoparticles (Mt-NPs) are increasingly used in cosmetology due to their ultraviolet shielding (titanium dioxide [TiO2]), antioxidant (cerium dioxide [CeO2]), and biocidal (silver [Ag]) properties. In the absence of overt toxicity (i.e., cell death), Mt-NPs are considered safe for cosmetic...
Bernd Kuhn et al.
Bioorganic & medicinal chemistry letters, 16(15), 4016-4020 (2006-06-02)
In the quest for novel PPARalpha/gamma co-agonists as putative drugs for the treatment of type 2 diabetes and dyslipidemia, we have used a structure-based design approach to identify propionic acids with a 1,5-disubstituted indole scaffold as potent PPARalpha/gamma activators. Compounds...
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