PMID: 2504130Jan 1, 1989Paper

Mutagenicity and cytotoxicity of 2-chlorobenzylidene malonitrile (CS) and metabolites in V79 Chinese hamster cells

Archives of Toxicology
K Ziegler-SkylakakisU Andrae

Abstract

The genotoxicity of the sensory irritant 2-chlorobenzylidene malonitrile (CS) to V79 Chinese hamster cells was investigated using the induction of gene mutations, micronuclei and DNA repair synthesis as biological endpoints. CS efficiently induced micronuclei and mutants resistant to 6-thioguanine in these cells, but it did not elicit DNA repair synthesis. Induction of micronuclei and mutants showed very similar courses of concentration dependence, suggesting that both events were caused by the same mechanism. The hydrolysis products of CS, o-chlorobenzaldehyde and malononitrile dit not induce micronuclei and were much less cytotoxic than CS. The observation of heritable genetic changes in cells exposed to CS in the absence of detectable DNA damage suggests that the genetic effects of CS are not caused by an interaction of the compound or its hydrolysis products with DNA. It appears more likely that the mutagenic activity is the consequence of effects of CS on the mitotic apparatus of the cells causing chromosomal aneuploidy.

References

Sep 15, 1975·European Journal of Biochemistry·H Sies, K H Summer
Jan 1, 1986·Mutation Research·S M Galloway, J L Ivett
Feb 4, 1972·Nature·G R Jones
May 1, 1973·Toxicology and Applied Pharmacology·L Leadbeater
Dec 1, 1982·Mutation Research·A M Duncan, H J Evans
Aug 1, 1964·Journal of Molecular Biology·D PETTIJOHN, P HANAWALT

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