On the induction of umu gene expression in Salmonella typhimurium strain TA1535/pSK1002 by some nitrofurans. |
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| Authors: | A K Pal M S Rahman S N Chatterjee |
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| Institution: | Biophysics Division, Saha Institute of Nuclear Physics, Calcutta, India. |
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| Abstract: | Several nitrofurans were found to induce umu gene expression in Salmonella typhimurium TA1535/pSK1002 as defined on the basis of at least a 2-fold increase of beta-galactosidase activity over the background level. beta-Galactosidase activity increased with increasing concentrations of the chemical, attained a maximum at a concentration which was different for different nitrofurans used, and then gradually decreased with a further increase of the nitrofuran concentration. The umu gene expression test revealed that the genotoxic activity was highest for furazolidone and lowest for 5-nitro-2-furaldehyde. |
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