Abstract:Objective To investigate the level of serum soluble triggering receptor expressed on myeloid cells-1 (sTREM-1), soluble urokinase-type plasminogen activator receptor (suPAR) and soluble intercellular adhesion molecule-1 (sICAM-1) in patients with acute exacerbation of chronic obstructive pulmonary disease and its correlation with the disease condition. Methods Sixty-eight patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD) admitted to our hospital from January 2018 to August 2019 were selected as the AECOPD group. In the same period, 42 patients with stable chronic obstructive pulmonary disease (COPD) were selected as the stable COPD group, and 42 healthy subjects were enrolled as the control group. The forced expiratory volume in one second (FEV1) and FEV1 percentage predicted (FEV1%pred) were examined and calculated. Serum sTREM-1, suPAR, and sICAM-1 levels were detected by ELISA, and the differences among the groups were compared. Pearson correlation analysis was used to investigate the relationship between serum sTREM-1, suPAR and sICAM-1 levels and indicators of pulmonary function. Results The serum sTREM-1, suPAR and sICAM-1 levels among the three groups were all significantly different (P < 0.05), and those in the stable COPD group and AECOPD group were higher than those in the control group (P < 0.05). Furthermore, compared with stable COPD group, serum sTREM-1, suPAR and sICAM-1 levels were higher in AECOPD group (P < 0.05). Pearson correlation analysis showed that serum sTREM-1 (r = -0.868), suPAR (r = -0.911), and sICAM-1 (r = -0.908) levels in patients with AECOPD were negatively correlated with FEV1%pred (P < 0.05). Conclusions The serum levels of sTREM-1, suPAR and sICAM-1 are increased in AECOPD patients. Moreover, the higher are the levels of sTREM-1, suPAR and sICAM-1, the lower is FEV1%pred, which can be used as an index for indicating the disease condition of AECOPD.