In 10 mM Tris buffer containing 1 mM EDTA and 1 mM PMSF. The homogenates were centrifuged at 600 ?g for 10 min, and then centrifuged at 13,000 ?g for 20 min at 4 . SOD1 activity was measured by monitoring its capacity to inhibit the reduction of ferricytochrome c by xanthine/xanthine oxidase as described by McCord and Fridovich [19]. SOD1 activity staining was performed by electrophoresis in 10 native polyacrylamide gels and visualized as described by Beauchamp and Fridovich [20]. Briefly, the gel was soaked in 2.45 mM nitroblue tetrazolium solution for 15 min, followed by 30 min in 28 mM N, N, N, N-tetramethylethylene diamine and 28 MAll data are expressed as mean ?standard error of the mean (SEM). To determine the effects of Cd and DMS, differences between the means were statistically analyzed using two-way analysis of variance (ANOVA) with repeated measures and Bonferroni’s post hoc test.ResultsQuantification of Cd content in kidney and brain tissuesThe ICP-MS method was used to determine Cd concentrations in serum, kidney, and hippocampal tissues. Cd concentrations in serum, kidney, and hippocampal tissues were similar in the Resiquimod cost control and DMS-treated groups. In the Cd-treated group, Cd concentrations in the serum and kidney were significantly higher than those in the control group. In contrast, there was no significant difference in the Cd concentration in the hippocampus between the control and DMS-treated groups, although the level was increased 1.57-fold in the control group. In the Cd-DMS-treated group, Cd concentrationsKim et al. BMC Complementary and Alternative Medicine 2014, 14:428 http://www.biomedcentral.com/1472-6882/14/Page 4 ofin the serum and kidneys were significantly lower than those in the Cd-treated group (Table 1).Effects of Cd and/or DMS on ROS formation in hippocampal homogenatesGPx activities in the Cd-DMS-treated group were significantly higher than those in the Cd-treated group, and the greatest increase was in GPx activity (Figure 2).Effects of Cd and/or DMS on glutathione-related enzymes in hippocampal homogenatesDCF fluorescence levels were similar in the control and DMS-treated groups. DCF fluorescence was significantly increased (1.71-fold) in the Cd-treated group in comparison with that of the control group. However, the MDA level of the Cd-DMS-treated group was significantly decreased to 74.4 of that of the Cd-treated group (Figure 1A).Effects of Cd and/or DMS on protein carbonyl levels in hippocampal homogenatesProtein carbonyl levels were similar in the control and DMS-treated groups. However, the protein carbonyl level of the Cd-treated group was significantly increased (2.4-fold) in comparison with that of the control group. The protein carbonyl level of the Cd-DMS-treated group was significantly decreased to 57.4 of that of the Cdtreated group (Figure 1B).Effects of Cd and/or DMS on lipid peroxidation in hippocampal homogenatesIn the control and DMS-treated groups, GSH level, TSH (total sulfhydryl groups) level, and the activities of GR and GST were similar in the hippocampal homogenates. In the Cd-treated group, TSH level and GR activity were significantly decreased to 53.5 PubMed ID:https://www.ncbi.nlm.nih.gov/pubmed/27362935 and 37.8 of those of the control group, respectively. In contrast, GST activity in the Cd-treated group was significantly increased to 147.7 of that of the control group. In the Cd-DMStreated group, TSH level and GR activity were significantly increased to 172.9 and 174.7 of those of the control group, respectively. GST.
