Abstract
One amebicide (chloroquine diphosphate) and 2 anthelmintic compounds (niclosamide and pyrvinium pamoate) were found to be mutagenic for Salmonella typhimurium TA1537, TA1538, TA100 and TA98 Uvr − strains respectively. Drugs tested on homologous Uvr + strains (TA1977, TA1978, UTH8414 and UTH8413) showed decreased mutagenic activity of the compounds. This indicates that premutational damage induced by the drugs was totally or partially repaired. Furthermore, results obtained in the present study suggest that niclosamide and pyrvinium pamoate induce premutational lesions by adduct formation, and that chloroquine diphosphate, known as an intercalating agent, behaves as an adduct-forming compound as regards its effects on Uvr − and Uvr + S. typhimurium strains.
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