Figure 2. Effect of isosorbide dinitrate (ISDN) treatment on reduced glutathione (GSH) in the rat cortex after intracerebral administration of the demyelinating agent ethidium bromide. Data are means ± SEM. *: p < 0.05 vs the saline control group and between different groups as indicated. +: p < 0.05 vs the ethidium bromide control group.