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naphthalene/necrosis
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Pagina 1 a partire dal 64 risultati
Evidence that 1-naphthol is not an obligate intermediate in the covalent binding and the pulmonary bronchiolar necrosis by naphthalene.
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Recent studies of a number of volatile aromatic hydrocarbons have suggested that the formation of covalently bound metabolites arises solely through the intermediate formation of phenols. This study further examines the involvement of 1-naphthol in the in vivo and in vitro formation of covalently
DNA damage and cell necrosis induced by naphthalene due to the modulation of biotransformation enzymes in an estuarine crab Scylla serrata.
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The sublethal effect of naphthalene (2.5, 5, and 10 mg L(-1)) was studied in an estuarine crab Scylla serrata with reference to macromolecular changes. Biotransformation enzymes such as cytochrome P450, cytochrome b(5), NADPH cytochrome P450 reductase, aryl hydrocarbon hydroxylase,
Metabolic activation and bronchiolar Clara cell necrosis from naphthalene in the isolated perfused mouse lung.
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A method for isolation and maintenance of the mouse lung ex vivo suitable for the study of the relationship between metabolism and toxicity is described. Physical, biochemical and morphological evaluations revealed that the lung is viable for up to 5 hr. No significant alterations in the
Comparison of the arachidonic acid and NADPH-dependent microsomal metabolism of naphthalene and 2-methylnaphthalene and the effect of indomethacin on the bronchiolar necrosis.
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Naphthalene and 2-methylnaphthalene cause a highly organo- and species-selective lesion of the pulmonary bronchiolar epithelium in mice. Naphthalene- but not 2-methylnaphthalene-induced pulmonary bronchiolar injury is blocked by prior administration of the cytochrome P-450 monooxygenase inhibitor
Augmentation of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-induced apoptosis by the synthetic retinoid 6-[3-(1-adamantyl)-4-hydroxyphenyl]-2-naphthalene carboxylic acid (CD437) through up-regulation of TRAIL receptors in human lung cancer cells.
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Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) induces apoptosis via the death receptors DR4 and DR5 in different transformed cells in vitro and exhibits potent antitumor activity in vivo with minor side effects. The synthetic retinoid CD437 is a potent inducer of apoptosis in
Relationship of naphthalene and 2-methylnaphthalene metabolism to pulmonary bronchiolar epithelial cell necrosis.
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Tolerance to multiple doses of the pulmonary toxicant, naphthalene.
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Intraperitoneal administration of single doses of the volatile aromatic hydrocarbon, naphthalene, resulted in dose-dependent bronchiolar epithelial cell necrosis in mice. Twenty-four hours after a dose of 50 mg/kg, swelling of Clara cells with some exfoliation of epithelial cells was evident in half
Comparative cytotoxicity of naphthalene and its monomethyl- and mononitro-derivatives in the mouse lung.
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Male Swiss-Webster mice were exposed to naphthalene, 1-methyl-, 2-methyl-, 1-nitro- and 2-nitronaphthalene by intraperitoneal injection of peanut oil solutions over a dose range of 0.5-3.0 mmol kg-1 body weight. Treated mice were killed at times from 6 hours to 14 days post-treatment. Tissues were
Evidence for hepatic formation, export and covalent binding of reactive naphthalene metabolites in extrahepatic tissues in vivo.
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Previous studies have shown that cytochrome P-450-mediated metabolism of naphthalene results in dose-dependent bronchiolar necrosis in mice and in the formation of reactive metabolites which deplete reduced glutathione and become bound covalently to tissue macromolecules. The finding that pulmonary
Evidence for cytochrome P-450 mediated metabolism in the bronchiolar damage by naphthalene.
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Intraperitoneal administration of the volatile hydrocarbon, naphthalene, resulted in severe bronchiolar epithelial cell necrosis in mice, while hepatic or renal necrosis was not observed. Pulmonary damage and mortality by naphthalene were increased by prior treatment with diethyl maleate and
Glutathione depletion is a major determinant of inhaled naphthalene respiratory toxicity and naphthalene metabolism in mice.
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Naphthalene (NA) is metabolized to highly reactive intermediates that are primarily detoxified by conjugation to glutathione (GSH). Intraperitoneal administration of naphthalene causes substantial loss of both hepatic and respiratory GSH, yet only respiratory tissues are injured in mice. The liver
Quantification of individual glutathione S-transferase isozymes in hepatic and pulmonary tissues of naphthalene-tolerant mice.
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Acute exposure to naphthalene produces severe bronchiolar epithelial cell necrosis in mice, whereas subchronic exposure to naphthalene (200 mg/kg/7 days) fails to produce epithelial necrosis and renders the animals tolerant to subsequent challenge doses of naphthalene. Mechanisms responsible for the
Prevention of naphthalene-induced pulmonary toxicity by glutathione prodrugs: roles for glutathione depletion in adduct formation and cell injury.
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Naphthalene is metabolized in the lung and liver to reactive intermediates by cytochrome P450 enzymes. These reactive species deplete glutathione, covalently bind to proteins, and cause necrosis in Clara cells of the lung. The importance of glutathione loss in naphthalene toxicity was investigated
Glutathione depletion and cytotoxicity by naphthalene 1,2-oxide in isolated hepatocytes.
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The ability of naphthalene 1,2-oxide to diffuse across intact cellular membranes, the subsequent biotransformation of this epoxide and its potential to produce losses in cellular viability have been examined in incubations of isolated hepatocytes. Addition of 1R,2S- or 1S,2R-naphthalene oxide
Metabolism and cytotoxicity of naphthalene oxide in the isolated perfused mouse lung.
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Naphthalene produces selective injury to Clara cells in the mouse in vivo and in the isolated perfused lung. To investigate the role of circulating reactive metabolites in lung injury, the stability, metabolism and cytotoxicity of naphthalene oxide, a reactive intermediate, were examined in the
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