Figure 4From: Comparison between cigarette smoke-induced emphysema and cigarette smoke extract-induced emphysema SOD and IL-6 concentrations in serum of C57BL/6 J mice induced by CS exposure (A) and that induced by intraperitoneal injection of CSE (B). SOD, superoxide dismutase; IL-6, interleukin-6; CS, cigarette smoke; CSE, cigarette smoke extract. ★P < 0.01 compared with controls.Back to article page