Fig. 3

Levels of total sulfhydryl (TSH), glutathione-S-transferase (GST), and glutathione reductase (GR) in the hippocampi of control, DML, MeHg, and DML-MeHg groups following 4 weeks of DML and/or MeHg treatment. ^* Indicates a significant difference between the control and MeHg groups or DML and DML-MeHg groups (p < 0.05); ^# indicates a significant difference between the control and DML or between MeHg and DML-MeHg groups (p < 0.05; n = 7 per group). TSH levels and GR activity are significantly decreased in the MeHg group, while GST activity is significantly increased. The administration of DML reduces the changes of these parameters. The data represent means ± standard error of the mean (SEM)