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13 résultats
Effects of quinoline and 8-hydroxyquinoline on mouse bone marrow erythrocytes as measured by the micronucleus assay.
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Both quinoline and 8-hydroxyquinoline (HOQ) were tested for their genotoxicity in CD1 male mice by using a bone marrow micronucleus assay. Mice were intraperitoneally treated in single injections with three dose levels (25, 50, and 100 mg/kg) of each chemical with corn oil as solvent vehicle. Bone
Genotoxicity and carcinogenicity in rats and mice of 2-amino-3,6-dihydro-3-methyl-7H-imidazolo[4,5-f]quinolin-7- one: an intestinal bacterial metabolite of 2-amino-3-methyl-3H-imidazo[4,5-f]quinoline.
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BACKGROUND
Compounds formed on the surface of fried or grilled meat and fish may be associated with increased risk of colon cancer. Normal intestinal bacteria can convert one of these compounds, 2-amino-3-methyl-3H-imidazo[4,5-f]quinoline (IQ), to the 7-hydroxy metabolite,
Induction of tumors in the colon and liver of the immunodeficient (SCID) mouse by 2-amino-3-methylimidazo[4,5-f ]quinoline (IQ)-modulation by long-chain fatty acids.
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We have recently shown that immunodeficient (SCID) mice, which lack functional T and B cells, are highly susceptible to low dose site specific induction of colon aberrant crypt foci (ACF), surrogates for colon tumors, by 2-amino-3-methylimidazo[4,5-f ]quinoline (IQ). To test whether long-term
Effects of dietary menhaden oil on DNA adducts of the food mutagen 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) in Fischer-344 rats.
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2-Amino-3-methylimidazo[4,5-f]quinoline (IQ) is a food mutagen which has been found to be carcinogenic in the Fischer-344 rat. We have assessed the effects of a diet containing menhaden oil on IQ-DNA adduct formation in several organs of the male Fischer-344 rat. Young adult, male Fischer-344 rats
Dietary modulation of DNA adduct formation of the food mutagen 2-amino-3-methylimidazo[4,5-f]quinoline in the male Fischer 344 rat.
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In numerous in vivo systems it has been shown that diets high in menhaden oil (a fish oil high in omega-3 fatty acids) can inhibit the carcinogenic process. In the present study, we have assessed the effects of a diet containing menhaden oil on 2-amino-3-methylimidazo[4,5-f]quinoline (IQ)-DNA adduct
Effect of enzyme inducers on the metabolism of 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) in the rat.
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The effect of enzyme inducers 3-methylcholanthrene (3-MC) and Aroclor 1254 (A-1254) on the metabolic fate of the dietary mutagen and carcinogen 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) in male F344 rats was studied in relation to single dose corn oil and untreated controls. The latter two groups
Chemoprotective effects of garden cress (Lepidium sativum) and its constituents towards 2-amino-3-methyl-imidazo[4,5-f]quinoline (IQ)-induced genotoxic effects and colonic preneoplastic lesions.
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The chemoprotective effect of garden cress (GC, Lepidium sativum) and its constituents, glucotropaeolin (GT) and benzylisothiocyanate (BITC), a breakdown product of GT, towards 2-amino-3-methyl-imidazo [4,5-f] quinoline (IQ)-induced genotoxic effects and colonic preneoplastic lesions was
Effect of dietary lipids on hepatic and intestinal monooxygenases in mice.
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The effect of dietary lipids on hepatic and intestinal monooxygenases was studied by feeding C57BL/6N mice (for 2 wks) diets containing 5% and 23.5% (wt/wt) olive oil or corn oil. At the end of the feeding period, we measured arylhydrocarbon hydroxylase (AHH) activity in S9 preparations from liver,
Effect of dietary fat levels on the susceptibility of colonic cells to nuclear-damaging agents.
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The effect of two levels and types of dietary fats on the susceptibility of colonic cells to the nuclear-damaging effect of 1,2-dimethylhydrazine dihydrochloride (DMH), 2-amino-3,4-dimethylimidazo(4,5-f)quinoline (MeIQ), and gamma-radiation was investigated. Corn oil and beef tallow were added to
Mutagens in cooked foods--metabolism and genetic toxicity.
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Recently developed in our laboratories is an efficient extraction procedure incorporating XAD resin adsorption which yields from 200 degrees C grilled ground beef an extract containing 230 Salmonella TA1538 revertants per g fresh weight of original ground beef. These mutagenic components are
Dietary modulation of the carcinogenicity of the heterocyclic amines.
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Heterocyclic amines (HCAs) are potent mutagens and carcinogens formed during cooking of meats or fish. They are, therefore, widely consumed by humans.
OBJECTIVE
A series of studies explore modulation of the mutagenicity and carcinogenicity of typical HCAs like 2-amino-3-methylimidazo[4,5-f]quinoline
Role of fat and calcium in cancer causation by food mutagens, heterocyclic amines.
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We investigated the modulation by dietary corn oil and calcium levels of carcinogenesis by heterocyclic amines (HCA), a new class of important carcinogens in the human nutritional environment, since they are formed during cooking. Two approaches involved (i) a chronic bioassay in male and female
Metabolic conversion of IQ and MeIQ to bacterial mutagens.
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The metabolic conversion of 2-amino-3-methyl- and 2-amino-3,4-dimethyl-imidazo[4,5-f]quinoline (IQ and MeIQ respectively) to bacterial mutagens was studied using a bacterial mutation assay. Studies were performed using S9 fractions derived from either corn oil (uninduced) or Aroclor-1254-treated
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