Relationship between the adrenergic system and glutathione status during ALA. Glutathione: (A) reduced GSH; (B) oxidized GSSG, (C) GSH/GSSG ratio and (D) total glutathione (GSH+GSSG), were determined in liver samples from healthy groups (black bars) and infected with trophozoites (white bars). Results are shown as the mean value of 5 animals ± SE. a, mean values significantly different vs. the intact group, p<0.05; b, mean values significantly different vs. the sham group, p<0.05; c, mean values significantly different vs. the ALA group; d, mean values significantly different vs. the 6-OHDA group, p<0.05; e, mean values significantly different vs. the 6-OHDA+ALA group, p<0.05; f, mean values significantly different vs. the propranolol group, p<0.05 and g, mean values significantly different vs. the propranolol + ALA group, p<0.05.