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Acute cytogenetic effect of 2-(2-furyl)-3-(5-nitro-2-furyl)-acrylamide (AF-2, a food preservative) on rat bone marrow cells in vivo

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TLDR
The present results provide the first evidence of in vivo cytogenetic effects of AF-2 on mammalian cells and, together with the evidence of mutagenicity already proved in other organisms, warn of the possible genetic hazards to cells exposed to this compounds.
Abstract
The cytogenetic effects of 2-(2-furyl)-3-(5-nitro-2-furyl)-acrylamide (AF-2), a food preservative used in Japan, on rat bone marrow cells in vivo were studied. The aberrant metaphase cells in the bone marrow increased and reached the peak level 6 h after intraperitoneal injection of 240 mg/kg body weight of AF-2 and returned to the normal level within 24 h. A dose-response relationship was obtained using 4–240 mg/kg of AF-2. Chromosome aberrations were also induced after oral administration of 30–240 mg/kg. The aberrations were mostly chromatid breaks and the distribution among and within chromosomes was similar to those induced by a carcinogen, 7,12-dimethylbenz( a )anthracene (DMBA). The present results provide the first evidence of in vivo cytogenetic effects of AF-2 on mammalian cells and, together with the evidence of mutagenicity already proved in other organisms, warn of the possible genetic hazards to cells exposed to this compound.

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Issues relevant to the assessment of chemically induced chromosome damage in vivo and their relationship to chemical mutagenesis

TL;DR: The study has confirmed that single exposure is as effective as multiple exposure in producing chromosome damage and that the correct sampling time is necessary to detect this damage, and suggested a time course sampling after a single treatment regime would be suitable for detecting the mutagenic potential of a chemical.
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Mutagenic evaluation of nitrofuran derivatives in Salmonella typhimurium, by the micronucleus test, and by in vivo cytogenetics

TL;DR: The mutagenicity of 12 nitrofurans was tested in the new Salmonella typhimurium tester strains TA100 and TA98 developed by Ames and coworkers from the standard tester strain TA1535 and TA1538 by the incorporation of an R-factor plasmid, pKM101, and indicated that TA100 was a more sensitive indicator of nitro furan mutagenic activity than TA98.
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7,12-DMBA-induced rat leukemia: a review with insights into future research.

TL;DR: 7,12-Dimethylbenz[a]anthracene (DMBA) elicits leukemia in Long-Evans rats (LE), which will provide an important tool for chemical carcinogenesis and leukemia studies and reveal a highly specific mutation of N-ras gene as in human leukemias.
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