The Isosteroid Alkaloid Imperialine from Bulbs of Fritillaria cirrhosa Mitigates Pulmonary Functional and Structural Impairment and Suppresses Inflammatory Response in a COPD-Like Rat Model

Figure 5

The effect of imperialine on levels of the inflammatory cytokines in serum. Results were expressed as the mean ± SEM (). Significant differences compared with the control group were designated as , , and . Significant differences compared with the COPD group were designated as    and .