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Showing 1-30 of 45 results for "152757" within Papers
Thasni K A et al.
Molecular carcinogenesis, 52(5), 392-403 (2012-02-01)
It has been shown earlier that plumbagin, a naturally occurring naphthaquinone has specific anticancer activity in BRCA1 blocked ovarian cancer cells. Plumbagin can induce estrogen dependent cell signaling and apoptosis in BRCA1 blocked ovarian cancer cells. Being a reactive oxygen
Katarzyna A Broniowska et al.
Biochemistry, 52(25), 4364-4372 (2013-05-31)
When produced at physiological levels, reactive oxygen species (ROS) can act as signaling molecules to regulate normal vascular function. Produced under pathological conditions, ROS can contribute to the oxidative damage of cellular components (e.g., DNA and proteins) and trigger cell
Michael G Berg et al.
Molecular and cellular biology, 32(7), 1271-1283 (2012-01-19)
Despite intensive research, there are very few reagents with which to modulate and dissect the mRNA splicing pathway. Here, we describe a novel approach to identify such tools, based on detection of the exon junction complex (EJC), a unique molecular
Reiko Hirose et al.
The Journal of toxicological sciences, 37(5), 891-898 (2012-10-06)
While metabolic activation of naphthalene, yielding 1,2-naphthoquinone (1,2-NQ) and 1,4-NQ that can covalently bind to cellular proteins, has been recognized to be associated with its toxicity, the current consensus is that such electrophile-mediated covalent modification of sensor proteins with thiolate
Yoshiyuki Mizushina et al.
International journal of oncology, 42(3), 793-802 (2013-01-23)
Vitamin Ks (VKs) are fat-soluble quinone compounds known to have various bioactivities. This review describes the inflammatory effects of VKs and their related quinone derivatives based on DNA polymerase (pol) inhibition. VK3, but not VK1 or VK2 (=MK-4), inhibited the
Marianne Placzek et al.
Acta dermato-venereologica, 93(1), 30-32 (2012-09-18)
Benzophenone is a phototoxic compound with absorption maxima in the ultraviolet A (UVA) and ultraviolet B (UVB) range. Many benzophenone derivatives are known to be photosensitizing. On the other hand, 2-hydroxy-4-methoxybenzophenone is used as a photoprotective agent. The aim of
Don Antoine Lanfranchi et al.
Organic & biomolecular chemistry, 10(31), 6375-6387 (2012-07-11)
Improving the solubility of polysubstituted 1,4-naphthoquinone derivatives was achieved by introducing nitrogen in two different positions of the naphthoquinone core, at C-5 and at C-8 of menadione through a two-step, straightforward synthesis based on the regioselective hetero-Diels-Alder reaction. The antimalarial
Olivia Berthoumieu et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 21(36), 12657-12666 (2015-07-17)
Inhibition of the aggregation of the monomeric peptide β-amyloid (Aβ) into oligomers is a widely studied therapeutic approach in Alzheimer's disease (AD). Many small molecules have been reported to work in this way, including 1,4-naphthoquinon-2-yl-L-tryptophan (NQ-Trp). NQ-Trp has been reported
Ivana Milackova et al.
Journal of enzyme inhibition and medicinal chemistry, 30(1), 107-113 (2014-03-29)
The ability of flavonoids to affect multiple key pathways of glucose toxicity, as well as to attenuate inflammation has been well documented. In this study, the inhibition of rat lens aldose reductase by 3,7-di-hydroxy-2-[4-(2-chloro-1,4-naphthoquinone-3-yloxy)-3-hydroxy-phenyl]-5-hydroxy-chromen-4-one (compound 1), was studied in greater
Julie A Vrana et al.
Toxicological sciences : an official journal of the Society of Toxicology, 140(2), 338-351 (2014-05-16)
The rapid pharmacodynamic response of cells to toxic xenobiotics is primarily coordinated by signal transduction networks, which follow a simple framework: the phosphorylation/dephosphorylation cycle mediated by kinases and phosphatases. However, the time course from initial pharmacodynamic response(s) to cell death
Serena Bertoni et al.
Pharmaceutics, 11(8) (2019-07-31)
The present study aimed to develop a novel formulation containing glutathione (GSH) as an oral antioxidant therapy for the treatment of oxidative stress-related intestinal diseases. To this purpose, solid lipid microparticles (SLMs) with Dynasan 114 and a mixture of Dynasan
Mohankrishna Dalvoy Vasudevarao et al.
The Journal of biological chemistry, 289(11), 7702-7717 (2014-01-29)
Hydroxynaphthoquinone-based inhibitors of the lysine acetyltransferase KAT3B (p300), such as plumbagin, are relatively toxic. Here, we report that free thiol reactivity and redox cycling properties greatly contribute to the toxicity of plumbagin. A reactive 3rd position in the naphthoquinone derivatives
Tomohiro Motono et al.
Journal of separation science, 38(14), 2381-2386 (2015-04-29)
Low-temperature high-performance liquid chromatography, in which a loop injector, column, and detection cell were refrigerated at -35ºC, using liquid carbon dioxide as the mobile phase was developed. Small organic compounds (polyaromatic hydrocarbons, alkylbenzenes, and quinones) were separated by low-temperature high-performance
Adriano Olímpio da Silva et al.
European journal of medicinal chemistry, 60, 51-56 (2013-01-03)
The discovery and development of essential drugs for Chagas disease is a major concern worldwide. New substituted 1,4-naphthoquinones were synthesized and tested against the infective bloodstream form of Trypanosoma cruzi, the etiological agent of Chagas disease. These products exhibited substantial
Anita Mahapatra et al.
Bioorganic & medicinal chemistry, 15(24), 7638-7646 (2007-09-25)
The naphthoquinone 7-methyljuglone (5-hydroxy-7-methyl-1,4-naphthoquinone) has previously been isolated and identified as an active component of root extracts of Euclea natalensis which displays antitubercular activity. Herein, a series of synthetic and plant-derived naphthoquinone derivates of the 7-methyljuglone scaffold have been prepared
Mozna H Khraiwesh et al.
Archives of pharmacal research, 35(1), 27-33 (2012-02-03)
The antitrypanosomal activities, cytotoxicity, and selectivity indices of eleven imido-substituted 1,4-naphthoquinone derivatives and nifurtimox have been studied. Compared to nifurtimox (IC(50) = 10.67 μM), all the imido-naphthoquinone analogs (IMDNQ1-IMDNQ11) are more potent on Trypanosoma cruzi with IC50 values ranging from
Yu Shang et al.
Toxicology in vitro : an international journal published in association with BIBRA, 27(2), 922-931 (2013-01-22)
Traffic-related particulate matter (PM) is associated with adverse health effects. Quinones present in the traffic-related PM are hypothesized to contribute to these harmful effects through reactive oxygen species (ROS) generation. However, the impacts of the traffic-related PM and quinones on
Justyna McIntyre et al.
The Journal of biological chemistry, 290(45), 27332-27344 (2015-09-16)
Human DNA polymerases (pols) η and ι are Y-family DNA polymerase paralogs that facilitate translesion synthesis past damaged DNA. Both polη and polι can be monoubiquitinated in vivo. Polη has been shown to be ubiquitinated at one primary site. When
Yakini Brandy et al.
Molecules (Basel, Switzerland), 18(2), 1973-1984 (2013-02-06)
Symmetrical and unsymmetrical 3-halo- or 3-methoxy- substituted 2-dibenzoylamino- 1,4-naphthoquinone analogs were synthesized with an average yield of 45% via sodium hydride promoted bis-acylation of 2-amino-3-chloro-1,4-naphthoquinone, 2-amino-3-bromo-1,4-naphthoquinone and 2-amino-3-methoxy-1,4-naphthoquinone.
Eduardo Coelho-Cerqueira et al.
Chemical biology & drug design, 83(4), 401-410 (2013-10-30)
Monoamine oxidase (MAO) action has been involved in the regulation of neurotransmitters levels, cell signaling, cellular growth, and differentiation as well as in the balance of the intracellular polyamine levels. Although so far obscure, MAO inhibitors are believed to have
Shalini John et al.
European journal of medicinal chemistry, 45(9), 4004-4012 (2010-06-29)
Indoleamine 2,3-dioxygenase, a heme-containing enzyme, is emerging as a vital target for the treatment of cancer, chronic viral infections, and other diseases. The aim of this study is to identify novel scaffolds and utilize them in designing potent IDO inhibitors.
Fernanda Luna da Silva et al.
Neurochemistry international, 62(1), 103-112 (2012-10-16)
In the last decades, a series of compounds, including quinones and polyphenols, has been described as having anti-fibrillogenic action on α-synuclein (α-syn) whose aggregation is associated to the pathogenesis of Parkinson's disease (PD). Most of these molecules act as promiscuous
Nanci C de Lucas et al.
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 11(7), 1201-1209 (2012-03-24)
The influence of ring size on the photobehaviour of condensed 1,4-naphthoquinone systems, such as pyrano- and furano-derivatives (1 and 2, respectively) has been investigated. The absorption spectra for both families of naphthoquinones reveal clear differences; in the case of 2
Shugeng Cao et al.
Bioorganic & medicinal chemistry, 17(6), 2276-2281 (2008-11-26)
Some simplified adociaquinone B analogs and a series of 1,4-naphthoquinone derivatives were synthesized and tested against the three enzymes Cdc25B, MKP-1, and MKP-3. Cdc25B and MKP-1 in particular are enzymes overexpressed in human cancer cells, and they represent potential molecular
Bor-Kai Hsiung et al.
The Journal of experimental biology, 220(Pt 11), 1975-1983 (2017-06-02)
Elucidating the mechanisms of colour production in organisms is important for understanding how selection acts upon a variety of behaviours. Spiders provide many spectacular examples of colours used in courtship, predation, defence and thermoregulation, but are thought to lack many
Rita Gatti et al.
Analytical and bioanalytical chemistry, 405(2-3), 817-825 (2012-07-24)
The use of 1,4-naphthoquinone as an advantageous pre-column reagent for liquid chromatography analysis of aliphatic thiol compounds is proposed. The compound reacts selectively in mild conditions (5 min at room temperature; pH 7.5) with thiol function. The resulting adducts were
Tereza Hartmanová et al.
Chemico-biological interactions, 202(1-3), 136-145 (2013-01-09)
Carbonyl reductase 1 (CBR1 or SDR21C1) is a ubiquitously-expressed, cytosolic, monomeric, and NADPH-dependent enzyme. CBR1 participates in apoptosis, carcinogenesis and drug resistance, and has a protective role in oxidative stress, cancer and neurodegeneration. S-Nitrosoglutathione (GSNO) represents the newest addition to
Alireza Nematollahi et al.
Journal of Asian natural products research, 14(1), 80-88 (2012-01-24)
The genus Diospyros is one of the most important sources of bioactive compounds, exclusively 1,4-naphthoquinones. The following information is an attempt to cover the developments in the biology and phytochemistry of 1,4-naphthoquinones isolated from this genus, as well as the
Hiromi Sato et al.
Journal of pharmacological sciences, 118(4), 467-478 (2012-03-27)
In this study, we describe the antitumor activity of QO-1, one of the new 2-aryl-1,4-naphthoquinone-1-oxime methyl ether derivatives. QO-1 is a derivative of macarpine, a natural occurring product from Rutaceae plant. It could potently inhibit cell growth when tested on
Leonid R Ptitsyn et al.
Fitoterapia, 82(8), 1285-1289 (2011-10-01)
An aqueous ethanol extract of Pyrola rotundifolia L. induced AMP-activated protein kinase (AMPK) phosphorylation in C2C12 myotubes. The bioassay-guided fractionation of the extract led to the isolation a 2-methyl-7-hydroxymethyl-1,4-naphthoquinone, or a 7'-hydroxy-chimaphilin, which showed concentration-dependent AMPK phosphorylation activity at 2.5-20
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