DNA-DAMAGE CAUSED BY ANTIBIOTIC DRUGS - QUINOLONES
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- Published online on: October 1, 1994 https://doi.org/10.3892/ijo.5.4.855
- Pages: 855-859
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Abstract
In the present investigation, the genotoxic potencies (SOSIP) of 10 antibiotic quinolones (topoisomerase LT inhibitors) were tested in the sfiA::lacZ fusion containing strain Escherichia coli PQ37 using a modified procedure of the SOS chromotest. A number of quinolones exhibited extremely high DNA damaging effects in the absence of an exogenous metabolizing system. The highest SOS inducing potencies (SOSIP) exhibited sparfloxacin with 2,400 Delta IF/nmole, ciprofloxacin (SOSIP = 184 Delta IF/nmole) and norfloxacin (SOSIP=120 Delta IF/nmole), whereas pipemic acid (SOSIP=4.6 Delta IF/nmole), cinoxacin (SOSIP=0.5 Delta IF/nmole) and nalidixic acid (SOSIP=0.5 Delta IF/nmole) showed only weak genotoxicity. The possibility of mutagenic effects caused by quinolones in eukaryotic cells is discussed.