Objective:To explore the clinical significance of desmosine in the pathogenesis of COPD by observing the urine levels of desmosine in different stages of COPD and analyzing the relationships with lung function.Method:30 cases of AECOPD were selected as the AECOPD group,30 cases of stable COPD were selected as the COPD group and 30 cases of healthy people were selected as the control group.Indirect competitive enzyme-linked immunosorbent assay method(IC-ELISA) was used to detect the urine desmosine levels of...