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butanone/kukurica siata
Odkaz sa uloží do schránky
Strana 1 od 21 výsledky
4-(Methylnitrosamino)-I-(3-pyridyl)-1-butanone enhances the expression of apolipoprotein A-I and Clara cell 17-kDa protein in the lung proteomes of rats fed a corn oil diet but not a fish oil diet.
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The nicotine-derived nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) is one of the most potent lung carcinogens in rodents. Several epidemiologic studies indicated that the development of lung cancer in smokers is influenced by the type and amount of dietary polyunsaturated fatty
Structure-activity relationships of isothiocyanates as mechanism-based inhibitors of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone-induced lung tumorigenesis in A/J mice.
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A structure-activity relationship study was carried out to identify structural features in arylalkyl and alkyl isothiocyanates that are associated with the inhibitory potency of these compounds against lung tumorigenesis induced in A/J mice by the tobacco-specific nitrosamine
A study of tobacco carcinogenesis: effect of the fat content of the diet on the carcinogenic activity of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone in F344 rats.
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3 Epidemiological studies indicate that the risk of cigarette smokers for cancer of the lung and of the pancreas is influenced by the fat content of the daily diet. In a long-term bioassay (24 months), we gave F344 rats 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), a tobacco-specific and
Inhibition of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone-induced lung tumorigenesis by dietary olive oil and squalene.
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Epidemiological studies have suggested that frequent olive oil consumption may be a protective factor against lung cancer formation. Squalene, a characteristic compound in olive oil, is an inhibitor of 3-hydroxy-3-methylglutaryl coenzyme A reductase activity and has been proposed to inhibit the
Inhibition of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone mouse lung tumorigenesis by arylalkynes, mechanism-based inactivators of cytochrome P450.
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Arylalkynes such as 4-phenyl-1-butyne (PBY), 5-phenyl-1-pentyne (PPY) and 2-ethynylnaphthalene (2-EN) are suicide inhibitors of cytochrome P450 enzymes. Arylalkyl isothiocyanates such as 6-phenylhexyl isothiocyanate (PHITC) are structurally related to arylalkynes and are known to inhibit the
Elevated 8-hydroxy-2'-deoxyguanosine levels in lung DNA of A/J mice and F344 rats treated with 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone and inhibition by dietary 1,4-phenylenebis(methylene)selenocyanate.
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1,4-Phenylenebis(methylene)selenocyanate (p-XSC) is an effective chemopreventive agent against 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK)-induced lung adenoma in female A/J mice. While p-XSC can effectively inhibit NNK-induced DNA methylation in female A/J mice and in male F344 rats, its
Effects of indole-3-carbinol on lung tumorigenesis and DNA methylation induced by 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and on the metabolism and disposition of NNK in A/J mice.
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The effects of indole-3-carbinol (I3C) on lung neoplasia induced by the tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) were assessed in an A/J mouse pulmonary adenoma bioassay. Mice were administered corn oil or I3C (25 or 125 mumol/mouse/day) by gavage for 4
Increased expression of cyclooxygenase-2 in rat lung tumors induced by the tobacco-specific nitrosamine 4-(methylnitrosamino)-4-(3-pyridyl)-1-butanone: the impact of a high-fat diet.
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Aberrant or excessive expression of cyclooxygenase (COX)-2 has been implicated in the pathogenesis of many disease processes, including carcinogenesis. COX-2 expression was immunohistochemically examined in archival samples (D. Hoffmann et al., Cancer Res., 53: 2758-2761, 1993) of lung neoplasms
Effect of frequency of isothiocyanate administration on inhibition of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone-induced pulmonary adenoma formation in A/J mice.
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The abilities of phenethyl isothiocyanate (PEITC) and 6-phenylhexyl isothiocyanate (PHITC) to inhibit 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK)-induced lung tumorigenicity, when administered by a standard four-dose protocol or by a single-dose protocol, were determined. Corn oil or
Inhibitory effects of diallyl sulfide on the metabolism and tumorigenicity of the tobacco-specific carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in A/J mouse lung.
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Diallyl sulfide (DAS), a component of garlic oil, has been shown to inhibit tumorigenesis by several chemical carcinogens. Our previous work demonstrated that DAS inhibited the metabolic activation of carcinogenic nitrosamines, including the tobacco-specific
The neurochemical basis for the behavioral effects of triadimefon.
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Administration of triadimefon (TDF) [1-(4-chlorophenoxy)-3,3-dimethyl-1-(1-H-1,2,4-triazol-1-yl)-2-butanone] in rodents incites heightened locomotor and stereotypy response, primarily through potentiation of dopaminergic activity. In the present study, 8 male Sprague-Dawley rats received repeated
Dose-response relationships in ketone-induced potentiation of chloroform hepato- and nephrotoxicity.
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Chloroform (CHCl3)-induced hepato- and nephrotoxicity was evaluated in male, Fischer 344 rats pretreated with various dosages (1.0 to 15.0 mmol/kg, po) of acetone (Ac), 2-butanone (Bu), 2-pentanone (Pn), 2-hexanone (Hx), or 2-heptanone (Hp). The CHCl3 challenge dosage (0.5 ml/kg, ip) produced slight
Evidence for the involvement of organelles in the mechanism of ketone-potentiated chloroform-induced hepatotoxicity.
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Ketones can potentiate the hepatotoxicity of haloalkanes in animals. This may be due, in part, to changes in organelle susceptibility. Male Sprague-Dawley rats were administered 15 mmol/kg (po) acetone, 2-butanone, 2-hexanone or 50 mg/kg (po) chlordecone or mirex (a nonketonic analog of
Mutagenesis induced by oral carcinogens in lacZ mouse (MutaMouse) tongue and other oral tissues.
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Animal models for carcinogenesis of the oral cavity are limited, although this disease is often fatal or disfiguring and its incidence in the USA is approximately 30 000 cases/year. Short-term whole-animal models for this disease should prove valuable in the investigation of factors affecting oral
Attraction to herbivore-induced plant volatiles by the host-foraging parasitoid fly Exorista japonica.
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Responses of the tachinid fly Exorista japonica Townsend to odors from corn plants infested with the fly's host, the larvae of the noctuid moth Mythimna separata (Walker), were examined in a wind tunnel. Naïve female flies showed a higher rate of landing on M. separata-infested corn plants from
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