1998 Volume 23 Issue SupplementI Pages 81-90
The mutagenicity potential of magnesium sulfate was re-assessed using the current procedure of the reverse mutation test with bacteria and chromosomal aberration test with mammalian cells (a Chines hamster lung fibroblast cell line;CHL/IU) in culture. In the reverse mutation test with bacteria, Salmonella typhimurium TA100, TA98, TA1535 and TA1537 and Escherichia coli WP2 uvrA were use and the maximum dose level was set at 5000μg/plate irrespective of the absence or presence of metabolic activation. Five dose levels (313-5000μg/plate) were selected for all strains except for TA98 without metabolic activation and for TA1537 with metabolic activation, for which 6 dose levels (156-5000μg/plate) were selected. Magnesium sulfate induced no increase in the number of colonies with reverse mutation in any of the strains irrespective of the absence or presence of metabolic activation in the dose-range-finding study or in the main study. In the chromosomal aberration test with mammalian cells, a Chinese hamster lung fibroblast cell line (CHL/IU) in culture was used and the maximum dose level was set at 5.0 mg/mL both in the direct and metabolic activation methods. Three dose levels (1.25-5.0 mg/mL) were selected. Magnesium sulfate induced no increase in the incidence of cells with chromosomal aberration or those with genome mutation (polyploidy) in any of the strains irrespective of the absence of presence of metabolic activation. Thus, it is concluded that magnesium sulfate does not have mutagenic potential under the presence experimental conditions.
