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Mutagenicity studies and D-glucaric acid determination in urine of workers exposed to mineral oils

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Summary

Urine from workers of a cold-rolling steel plant exposed to mineral oils were tested for the mutagenic activity by the Salmonella/microsome assay, and for D-glucaric acid content as a measure of hepatic mixed-function oxidase activity. An occupationally unexposed group served as control. The biological monitoring phase followed an environmental phase carried out in the working environment that showed a substantially low mutagenic/carcinogenic risk for the exposed workers. Urine samples were collected before, during and after work. From the results it was observed that the urinary mutagenicity was detectable only with TA98 strain in the presence of enzymatic activation (+ S9 mix). Further addition of beta-glucuronidase did not give any enhanced mutagenic effects. There was a significant difference in urinary mutagenicity between the exposed and control workers. However, in both groups the highest mutagenicity data was found in smokers: both exposed smoking workers and smoking controls had significantly higher urine mutagenicity than the non-smoking exposed and control workers. The results suggested a synergistic effect of smoking with exposure to mineral oils: the mutagenicity of urine from exposed smokers was significantly higher than that of control smokers. There was no difference in urinary D-glucaric acid results between exposed and unexposed groups, however, smokers of both groups had a significant increase in D-glucaric acid excretion. The authors suggest that even for this workplace with its low mutagenic/carcinogenic risk, smoking could interact with the complex mixtures present in the environment, and thus modify urinary mutagenicity data.

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Authors and Affiliations

  1. Istituto di Igiene, Facoltà di Farmacia e Scienze MM FF NN, Università di Perugia, Via del Giochetto, I-06100, Perugia, Italy

    Rossana Pasquini, Silvano Monarca, Giuseppina Scassellati Sforzolini, Angelo Savino & Giuseppe Angeli

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  1. Rossana Pasquini
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  2. Silvano Monarca
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  3. Giuseppina Scassellati Sforzolini
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  4. Angelo Savino
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  5. Giuseppe Angeli
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Pasquini, R., Monarca, S., Scassellati Sforzolini, G. et al. Mutagenicity studies and D-glucaric acid determination in urine of workers exposed to mineral oils. Int. Arch Occup Environ Heath 56, 275–284 (1985). https://doi.org/10.1007/BF00405269

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  • DOI: https://doi.org/10.1007/BF00405269

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