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Paris-Palacios, S. et al.

Paris-Palacios, Biagianti-Risbourg, Vernet,

Metallothionein induction related to hepatic structural perturbations and antioxidative defences in roach (Rutilus rutilus) exposed to the fungicide procymidone.

A variety of stresses, hormones, glucocorticoids and cytokines are known to induce metallothioneins (MTs) in animals. The aim of this study was to investigate the effects of chemical stress induced by the dicarboximide fungicide procymidone on hepatic structure, MT content and antioxidative defences (catalase and glutathione reductase activities and glutathione content) in the common fish Rutilus rutilus. Catalase and glutathione reductase activities remained stable throughout the experiment. Four days of exposure to 0.2 or 0.4 mg l(-1) of procymidone induced an obvious increase in liver MT content, perturbation of metal MT contents, and an increase in hepatic glutathione content. After 14 days' exposure, obvious and large structural alterations of the hepatic parenchyma occurred simultaneously with a decrease in MT and glutathione content. These events were interpreted as degeneration of the liver. Fish exposed for 14 days to procymidone and then placed for 14 days in clean water showed nearly complete decontamination of the liver, but MT concentrations remained high. The toxicological significance of these events is discussed.[1]

References

Metallothionein induction related to hepatic structural perturbations and antioxidative defences in roach (Rutilus rutilus) exposed to the fungicide procymidone. Paris-Palacios, S., Biagianti-Risbourg, S., Vernet, G. Biomarkers (2003) [Pubmed]

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