Relations between occupational exposure to coal mine dusts, erythrocyte catalase and Cu++/Zn++ superoxide dismutase activities, and the severity of coal workers' pneumoconiosis
| Autor: | J. P. Bertrand, P. Bernadac, Rachel Nadif, Martine Dusch, E. Bourgkard, Q T Pham, Jean-Marie Mur |
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| Rok vydání: | 1998 |
| Předmět: |
Adult
Male medicine.medical_specialty Erythrocytes Mineralogy Cumulative Exposure Antioxidants Occupational medicine Superoxide dismutase Animal science Occupational Exposure medicine Humans Coal chemistry.chemical_classification Glutathione Peroxidase biology Superoxide Dismutase Chemistry business.industry Glutathione peroxidase Pneumoconiosis Public Health Environmental and Occupational Health Middle Aged Catalase medicine.disease Coal Mining respiratory tract diseases Papers Toxicity biology.protein Tomography X-Ray Computed business Biomarkers |
| Zdroj: | ResearcherID |
| ISSN: | 1351-0711 |
| DOI: | 10.1136/oem.55.8.533 |
| Popis: | OBJECTIVES: To better understand the relations between occupational exposure, blood antioxidant enzyme activities, total plasma antioxidant concentration, and the severity of coal workers' pneumoconiosis (CWP). METHODS: Blood samples were obtained from miners without CWP exposed to low dust concentrations for > or = 4 years at the time of the study (n = 105), or exposed to high dust concentrations for > or = 14 years at the time of the study (n = 58), and from retired miners with CWP (n = 19). Miners without CWP were classified into three subgroups according to their estimated cumulative exposure to dust. Chest x ray films were obtained for each miner. Miners were classified in five subgroups according to their International Labour Organisation (ILO) profusion grades. Univariate tests were completed by multiple linear regression analyses. RESULTS: The estimated cumulative exposure to dust was strongly positively related to erythrocyte catalase activity and strongly negatively related to Cu++/Zn++ SOD activity only in miners exposed to high dust concentrations for > or = 14 years at the time of the study (F tests p = 0.006 and p = 0.004 respectively). Moreover, catalase activity was strongly related to the severity of CWP expressed as five subgroups of ILO profusion grades (F test p = 0.003); the greatest difference in the mean values was found between the group of 1/1 to 1/2 ILO profusion grades and the group of 2/1 to 3/3 ILO profusion grades. CONCLUSION: These results are in good agreement with the hypothesis that production of reactive oxygen species may be an important event in the exposure to coal mine dusts and the severity of CWP. Erythrocyte catalase and Cu++/Zn++ SOD activities are more closely related to recent exposure to high dust concentrations than to cumulative exposure, and could be considered as biological markers of exposure rather than as markers of early adverse biological effect. |
| Databáze: | OpenAIRE |
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