Figure 4.

Effects of andrographolide on cigarette smoke-induced lung antioxidant enzymatic activities. Mice were exposed to 4% cigarette smoke for 1 h daily for five consecutive days with or without andrographolide treatment. Enzymatic activities of SOD, catalase, GPx and GR in lung tissues obtained 24 h after the last cigarette smoke challenge were measured using elisa. Values are means ± SEM for six mice per group. ^#Significant different from sham air control and *significant difference from DMSO, P < 0.05.