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 11

Immunohistochemical staining of MMP-9 in lung tissues of rats in different groups and IOD of MMP-9 expression. Results were expressed as the mean ± SEM (). Significant difference compared with the control group was designated as . Significant difference compared with the COPD group was designated as .