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DNA-damaging activity in vivo and bacterial mutagenicity of sixteen hydrazine derivatives as related quantitatively to their carcinogenicity

Sixteen hydrazine derivatives (hydrazine, 1,1-dimethylhydrazine, 1,2-dimethylhydrazine, phenylhydrazine, procarbazine, isoniazid, isocarboxazid, nialamide, 2,4-dinitrophenylhydrazine, phenelzine, hydralazine, dihydralazine, carbamylhydrazine, mebanazine, iproniazid, and 1-carbamyl-2-phenylhydrazine)...

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Published in:Cancer research (Chicago, Ill.) Ill.), 1981-04, Vol.41 (4), p.1469
Main Authors: Parodi, S, De Flora, S, Cavanna, M, Pino, A, Robbiano, L, Bennicelli, C, Brambilla, G
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container_issue 4
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container_title Cancer research (Chicago, Ill.)
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creator Parodi, S
De Flora, S
Cavanna, M
Pino, A
Robbiano, L
Bennicelli, C
Brambilla, G
description Sixteen hydrazine derivatives (hydrazine, 1,1-dimethylhydrazine, 1,2-dimethylhydrazine, phenylhydrazine, procarbazine, isoniazid, isocarboxazid, nialamide, 2,4-dinitrophenylhydrazine, phenelzine, hydralazine, dihydralazine, carbamylhydrazine, mebanazine, iproniazid, and 1-carbamyl-2-phenylhydrazine) were tested for DNA-damaging activity by the alkaline elution technique and for mutagenic activity in the Salmonella-microsome (Ames) test. The first nine compounds listed (56%) were found to induce a significant DNA fragmentation in the liver and/or in the lung of i.p.-treated male Swiss mice. The DNA-damaging potency varied over an approximately 30-fold range. Thirteen of the first 14 compounds listed (81% of the total), isocarboxazid being inactive, were positive in the Ames test, with a broad range of activity towards the five bacterial strains of Salmonella typhimurium used (TA1535, TA100, TA1537. TA1538, and TA98) and of metabolic behavior in the presence of S-9 mix containing rat liver, mouse liver, or mouse lung postmitochondrial preparations from Aroclor-treated animals. The mutagenic potency varied over an almost 7000-fold range. For 11 of the 16 hydrazine derivatives tested, homogeneous carcinogenicity data (induction of pulmonary tumors in mice chronically treated p.o.) were available from literature. Elaboration of these data showed that carcinogenic potency varied over an approximately 1900-fold range. The five most potent carcinogens were all positive in the DNA damage test. Their carcinogenic potency varied over a 130-fold rage and their DNA-damaging potency varied over a 22-fold range. DNA-damaging potency seemed to vary on a more compressed scale, but regression analysis indicated the existence of a strong positive correlation between in vivo DNA-damaging and carcinogenic potencies, while a lack of correlation was found between mutagenic and carcinogenic potencies. There was no correlation between DNA-damaging and mutagenic potencies.
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The first nine compounds listed (56%) were found to induce a significant DNA fragmentation in the liver and/or in the lung of i.p.-treated male Swiss mice. The DNA-damaging potency varied over an approximately 30-fold range. Thirteen of the first 14 compounds listed (81% of the total), isocarboxazid being inactive, were positive in the Ames test, with a broad range of activity towards the five bacterial strains of Salmonella typhimurium used (TA1535, TA100, TA1537. TA1538, and TA98) and of metabolic behavior in the presence of S-9 mix containing rat liver, mouse liver, or mouse lung postmitochondrial preparations from Aroclor-treated animals. The mutagenic potency varied over an almost 7000-fold range. For 11 of the 16 hydrazine derivatives tested, homogeneous carcinogenicity data (induction of pulmonary tumors in mice chronically treated p.o.) were available from literature. Elaboration of these data showed that carcinogenic potency varied over an approximately 1900-fold range. The five most potent carcinogens were all positive in the DNA damage test. Their carcinogenic potency varied over a 130-fold rage and their DNA-damaging potency varied over a 22-fold range. DNA-damaging potency seemed to vary on a more compressed scale, but regression analysis indicated the existence of a strong positive correlation between in vivo DNA-damaging and carcinogenic potencies, while a lack of correlation was found between mutagenic and carcinogenic potencies. 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The five most potent carcinogens were all positive in the DNA damage test. Their carcinogenic potency varied over a 130-fold rage and their DNA-damaging potency varied over a 22-fold range. DNA-damaging potency seemed to vary on a more compressed scale, but regression analysis indicated the existence of a strong positive correlation between in vivo DNA-damaging and carcinogenic potencies, while a lack of correlation was found between mutagenic and carcinogenic potencies. 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subjects Animals
Carcinogens
DNA - analysis
Dose-Response Relationship, Drug
Female
Hydrazines - toxicity
Lethal Dose 50
Liver - analysis
Liver - pathology
Lung - analysis
Lung - pathology
Lung Neoplasms - chemically induced
Male
Mice
Models, Biological
Mutagens
Neoplasms, Experimental - chemically induced
Rats
Salmonella - drug effects
Salmonella - genetics
title DNA-damaging activity in vivo and bacterial mutagenicity of sixteen hydrazine derivatives as related quantitatively to their carcinogenicity
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