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Maria Nowacka et al.
Materials (Basel, Switzerland), 13(20) (2020-10-15)
Hybrid polymers containing pyrene (Py) units bound to linear poly(silsesquioxane) (LPSQ) chains through flexible linkers containing heteroatoms (S, N, O) (LPSQ-triazole-Py and LPSQ-amide-Py) exhibit intense fluorescence emission, both in very diluted solutions (c = 10-8 mol/L) and in the solid
Johan Øvrevik et al.
Toxicology letters, 219(2), 125-132 (2013-03-06)
We have previously observed that 1-nitropyrene (1-NP) and its amine metabolite 1-aminopyrene (1-AP) induce differential chemokine responses in human bronchial epithelial cells (BEAS-2B) characterized by maximum responses for CXCL8 (IL-8) and CCL5 (RANTES), respectively. In the present study, we further
Oksana Yosypchuk et al.
Analytical and bioanalytical chemistry, 404(3), 693-699 (2012-06-15)
A high-performance liquid chromatographic method with electrochemical detection (HPLC-ED) at a boron-doped diamond film electrode with preliminary separation and preconcentration by solid-phase extraction (SPE) has been developed for the determination of 1-hydroxypyrene (1-HP) in human urine. 1-HP is among the
Johan Øvrevik et al.
Environmental toxicology and pharmacology, 35(2), 235-239 (2013-01-26)
1-nitropyrene (1-NP), a common PAH in diesel exhaust, and its amine metabolite 1-aminopyrene (1-AP) induce distinctly different chemokine-responses in bronchial epithelial cells (BEAS-2B) characterized by increases in CXCL8 and CCL5, respectively. Tumor necrosis factor-α converting enzyme (TACE), which cleaves membrane-bound
A Ferancová et al.
Bioelectrochemistry (Amsterdam, Netherlands), 67(2), 191-197 (2005-08-27)
The aim of this work was voltammetric determination of 1-aminopyrene and 1-hydroxypyrene using carbon paste electrodes modified with cyclodextrin derivatives and double stranded deoxyribonucleic acid (dsDNA). The detection schemes based on a preconcentration and differential pulse voltammetric (DPV) determination at
Alison E Mahan et al.
Journal of immunological methods, 417, 34-44 (2014-12-20)
The N-glycan of the IgG constant region (Fc) plays a central role in tuning and directing multiple antibody functions in vivo, including antibody-dependent cellular cytotoxicity, complement deposition, and the regulation of inflammation, among others. However, traditional methods of N-glycan analysis
Kui Zeng et al.
Environmental toxicology and chemistry, 23(6), 1400-1407 (2004-09-21)
1-Aminopyrene (1-AP) is an environmental mutagen and a metabolite of 1-nitropyrene (1-NO2P). On light irradiation, 1-AP transforms into oxidation products with a half-life of 7.1 min in 10% methanolic buffer. The presence of DNA or free-radical/ singlet oxygen scavengers 1,4-dithiothreitol
Tianzhu Zhou et al.
Nature communications, 11(1), 2077-2077 (2020-05-01)
Flexible reduced graphene oxide (rGO) sheets are being considered for applications in portable electrical devices and flexible energy storage systems. However, the poor mechanical properties and electrical conductivities of rGO sheets are limiting factors for the development of such devices.
Sofja Tshepelevitsh et al.
Analytica chimica acta, 1132, 123-133 (2020-09-28)
Lipophilicity, usually expressed as octanol-water partition coefficient (logPo/w), is an important property in biomedical research, drug design and technology. However, high logPo/w values of complex hydrogen-bonding molecules are not easy to measure or calculate. Exemplary problematic molecules are prospective active
O Wongwattanasathien et al.
Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 48(4), 1045-1051 (2010-01-27)
The mutagenicity of dichloromethane, methanol and water extracts of Antigonon leptopus Hook. & Arn., Curcuma sessilis Gage, Hibiscus rosa-sinensis Linn., Ixora coccinea Linn., Millingtonia hortensis Linn., Nelumbo nucifera Gaertn., Plumeria obtusa Linn., Punica granatum Linn., Rhinacanthus nasutus ((Linn.) Kurz.) and
Bert Willis et al.
Bioorganic & medicinal chemistry letters, 19(17), 4974-4979 (2009-08-05)
A novel conjugate of Hoechst 33258, pyrene and neomycin was synthesized and examined for its binding and stabilization of A-T rich DNA duplexes using spectroscopic and viscometric techniques. The conjugate, containing three well known ligands that bind nucleic acids albeit
M A Belisario et al.
Toxicology, 108(1-2), 101-108 (1996-04-15)
Nitroarenes are environmental contaminants produced during incomplete combustion processes. Nitroreduction, the most important pathway of nitroarene toxification, occurs mainly in the liver and intestine. In the present study, we show that human red cells may also possess the metabolic competence
K Hayakawa
Biomedical chromatography : BMC, 14(6), 397-405 (2000-09-26)
Nitropolycyclic aromatic hydrocarbons (NPAHs), which are known to be carcinogenic and/or mutagenic, are considered to be one of the air pollutants that cause lung cancer. In the last two decades, a number of sensitive and selective methods have been developed
Robert Laumbach et al.
Journal of environmental monitoring : JEM, 11(1), 153-159 (2009-01-13)
Diesel exhaust (DE) is a significant source of air pollution that has been linked to respiratory and cardiovascular morbidity and mortality. Many components in DE, such as polycyclic aromatic hydrocarbons, are present in the environment from other sources. 1-Nitropyrene appears
Mangala Lakshmi Ragavan et al.
Current microbiology, 77(10), 2821-2830 (2020-06-28)
The present study investigates the therapeutic properties of probiotic yeasts viz. Yarrowia lipolytica VIT-MN01, Kluyveromyces lactis VIT-MN02, Lipomyces starkeyi VIT-MN03, Saccharomycopsis fibuligera VIT-MN04 and Brettanomyces custersianus VIT-MN05. The antimutagenic activity of probiotic yeasts against the mutagens viz. Benzo[a]pyrene (B[a]P), and
R Shapiro et al.
Chemical research in toxicology, 11(4), 335-341 (1998-05-05)
While the one-ring amine aniline (AN) has only slight genetic activity, the polycyclic aromatic amines 2-aminofluorene (AF) and 1-aminopyrene (AP) are significant mutagens and carcinogens. Moreover, the bulkier AP is more mutagenic per adduct than AF in the tetracycline-resistance gene
B Miksa et al.
Journal of biomaterials science. Polymer edition, 7(6), 503-513 (1995-01-01)
Poly(methyl methacrylate-methacrylic acid-2-hydroxyethyl methacrylate) latex (ACRYLAT) was synthesized by radical precipitation polymerization. The mass median diameter (MMD) and the geometrical standard deviation (GSD) of the ACRYLAT particles were 138 nm and 1.2, respectively. The concentration of the titrable carboxylic groups
Shanen M Sherrer et al.
Mutation research, 737(1-2), 25-33 (2012-08-25)
N-(Deoxyguanosin-8-yl)-1-aminopyrene (dG(AP)) is the predominant nitro polyaromatic hydrocarbon product generated from the air pollutant 1-nitropyrene reacting with DNA. Previous studies have shown that dG(AP) induces genetic mutations in bacterial and mammalian cells. One potential source of these mutations is the
S Torres-Cartas et al.
European journal of medicinal chemistry, 42(11-12), 1396-1402 (2007-05-08)
Mutagenicity is a toxicity endpoint associated with the chronic exposure to chemicals. Aromatic amines have considerable industrial and environmental importance due to their widespread use in industry and their mutagenic capacity. Biopartitioning micellar chromatography (BMC), a mode of micellar liquid
Tian Jin et al.
Talanta, 200, 242-248 (2019-05-01)
Due to severely overlapping emission and or/ excitation spectra of polycyclic aromatic hydrocarbons (PAHs), the specifically recognizing PAHs by the fluorescent technique is still a challenge. Here, synthesized Ag@SiO2 nanoparticles with 40 ± 4 nm Ag core and 7 ± 1 nm SiO2 shell performing as
P D Josephy et al.
Mutation research, 429(2), 199-208 (1999-10-20)
The mutagenic actions of many chemicals depend on the activities of bacterial "mutagenesis proteins", which allow replicative bypass of DNA lesions. Genes encoding these proteins occur on bacterial chromosomes and plasmids, often in the form of an operon (such as
Maciej Mazur et al.
Bioelectrochemistry (Amsterdam, Netherlands), 66(1-2), 89-94 (2005-04-19)
We report on the covalent attachment of pyrene to quartz and indium-doped tin oxide (ITO) surfaces, and its characterization by steady-state and time-resolved emission spectroscopy. We estimate the chromophore surface coverage on the basis of their electrochemical oxidation mechanism in
Toshimitsu Onduka et al.
Chemosphere, 169, 596-603 (2016-12-03)
Photo-induced toxicity is an important phenomenon in ecotoxicology because sunlight reaches many organisms in their natural habitats. To elucidate whether sunlight enhances the toxicity of nitro-polycyclic aromatic hydrocarbons (nitro-PAHs), the acute toxicities of 10 nitro-PAHs and the related compound 1-nitropyrene
Lun Wang et al.
Analytical and bioanalytical chemistry, 382(5), 1300-1303 (2005-05-26)
Organic fluorescence nanoparticles (1-aminopyrene nanoparticles) were prepared under ultrasonic radiation and used to determine nitrite. Such nanoparticles have a broad, continuous excitation spectrum, but they are also photochemically stable and water-soluble. Nitrite determination was based upon nitrite quenching the fluorescence
N Hatanaka et al.
Mutation research, 497(1-2), 223-233 (2001-08-30)
Metabolic activation of 1-nitropyrene (1-NP) by human cytochrome P450 (P450) family 1 enzymes co-expressed with NADPH-cytochrome P450 reductase (NPR) in Escherichia coli membranes was investigated. 1-NP induced umu gene expression in Salmonella typhimurium TA1535/pSK1002 in the absence of any P450
Li Ma et al.
Biochemistry, 57(31), 4735-4740 (2018-04-06)
It is challenging to assess protein-membrane interactions because of the lack of appropriate tools to detect position changes of single proteins in the ∼4 nm range of biological membranes. We developed an assay recently, termed surface-induced fluorescence attenuation (SIFA). It
John C Bachman et al.
Nature communications, 6, 7040-7040 (2015-05-07)
Electrochemical energy-storage devices have the potential to be clean and efficient, but their current cost and performance limit their use in numerous transportation and stationary applications. Many organic molecules are abundant, economical and electrochemically active; if selected correctly and rationally
B Mao et al.
Biochemistry, 35(39), 12659-12670 (1996-10-01)
Combined NMR-molecular mechanics computational studies were undertaken on the C8-deoxyguanosine adduct formed by the carcinogen 1-nitropyrene embedded in the d(C5-[AP]G6-C7).d(G16-C17-G18) sequence context in a 11-mer duplex, with dC opposite the modified deoxyguanosine. The exchangeable and nonexchangeable protons of the aminopyrene
Chengxi Zhu et al.
Journal of colloid and interface science, 546, 92-100 (2019-03-25)
We reported a carbon nanohorns/gold nanoparticles composites-based impedimetric aptasensor for carbendazim (CBZ) detection in lettuce and orange juice at picogram levels. The increased electron-transfer resistance, resulting from the formation of CBZ-aptamer complex, was recorded by electrochemical impedance spectroscopy as the
Man Jae Park et al.
Chemical communications (Cambridge, England), 48(89), 11008-11010 (2012-10-06)
Excess electron transfer dynamics in DNA hairpins was investigated by femtosecond laser flash photolysis of a donor-DNA-acceptor system using N,N-dimethylaminopyrene and diphenylacetylene as an electron donor and acceptor, respectively. It was revealed that the excess electron hopping rate between T's
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