Activity of glutathione peroxidase and superoxide dismutase in workers occupationally exposed to mercury.
Medichem 1997 : Silver Jubilee Medichem Congress on Occupational and Environmental Health in the Chemical Industry. Varna, BGR, 1997/09/30.
According to previous research the lipid peroxidation process has a significant role in mercury toxicity.
Since glutathione peroxidase (GPX) and superoxide dismutase (SOD) play a significant role in erythrocyte antioxidative defence, it is very important to determine their activity in occupationally exposed workers.
The aim of this study was to assess the activity of antioxidative enzymes in the erythrocytes of workers occupationally exposed to mercury.
We compared a group of 42 workers exposed to elemental mercury in a chloralkali plant (Hg group).
The control group (C group) consisted of 75 subjects employed in lime production who had never been exposed to mercury or any toxic substance.
The GPX activities in erythrocytes were significantly lower in the Hg group than in the control group (Hg group, 9.05 ± 7.52 IU/gHb ; C group 15.54 ± 4.85 IU/gHb ; p<0.001).
Also, SOD activity in the erythrocytes of workers occupationally exposed to mercury was significantly lower than in the control group (Hg group, 1280.7 ± 132.3 IU/gHb ; C group, 1377.9 ± 207.5 IU/gHb : p<0.006).
The concentrations of mercury in blood were significantly higher in the Hg group compared to the control group (Hg group. 0.179 ± 0.040 mumol/l ; C group. 0.023 ± 0.01 1 mumol/l ; p<0.001).
Urine mercury concentrations were also significantly higher in the Hg group than in the control group (Hg group, 23.2 ± 11.3 nmol/mmol creatinine : C group. 2.7 ± 0.6 nmol/mmol creatinine ; p<0.001). (...)
Mots-clés Pascal : Exposition professionnelle, Médecine travail, Mercure, Industrie chimique, Homme, Oxydation cellulaire, Erythrocyte, Toxicité, Mécanisme action, Glutathione peroxidase, Peroxidases, Oxidoreductases, Enzyme, Superoxide dismutase, Etude cohorte
Mots-clés Pascal anglais : Occupational exposure, Occupational medicine, Mercury, Chemical industry, Human, Cell oxidation, Red blood cell, Toxicity, Mechanism of action, Glutathione peroxidase, Peroxidases, Oxidoreductases, Enzyme, Superoxide dismutase, Cohort study
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0068096
Code Inist : 002B03L05. Création : 31/05/1999.