Objective To investigate the expression of Cofilin in alveolar and peripheral blood mononuclear cells in COPD patients and the correlation with the function of phagocytic aspergillus. Methods 20 COPD pa-tients were selected from July 2015 to May 2016 in the outpatient department of respiratory medicine of Zhujiang Hospital of Southern Medical University ,then divided into the experimental group 1(group Aand B in 2011 version of GOLD),group 2(test group C and group D in 2011 version of GOLD),and the healthy control group in 10 people. The AM and MDM in the peripheral bloodwere extracted respectively in the 3 groups by bronchoalveolar lavage and,and the ability of AM and MDM in each group were detected. The expression of Cofilin protein was measured by real-time fluorescence quantitative(qRT-PCR) and Western blotting ,and the differenceswere compared among the three groups. Results The colony numbers of MDM/AM in the 3 groups were 17 ± 3,16 ± 2, 42 ± 3(F = 73.446 ,P < 0.001),and the colony numbers of MDM/AM in the two test groupshad significantly different from the healthy group ,while no significant difference was found in the two test groups. The results of fluorescence quantitative reverse transcription polymerase chain reaction and Western blot analysis showed that the expression of Cofilin in the two test groups was significantly higher than that in the healthy group. Conclusion The decreased function of phagocytic aspergillus in the alveolar and peripheral blood mononuclear cells in COPD patients may relates to the increase of cofilin.

Objective To analyze the correlation between emphysema extent measured by high resolution computed tomography (HRCT) and pulmonary function tests, symptom score in patients with chronic obstructive pulmonary disease ( COPD ) , and to study the value of HRCT in the emphysema quantification in the clinical evaluation of COPD patients. Methods 78 patients with stable COPD were recruited to take the HRCT scan , and emphysema extent was qualified by measuring the proportion of low attenuation area in the whole lung (LAA%). Correlations between LAA% and indices of pulmonary function test, bronchial dilation test, mMRC scale, CAT score and six minutes walking distance (6MWD) were assessed. Results LAA% was negatively correlated with FEV1/FVC and DLCO%pred, and the correlation coefficients were -0.759 and -0.589 (P <0.01), respectively. LAA% was positively related to mMRC score (r = 0.342, P < 0.01), and negatively asso-ciated with 6MWD (r = -0.365,P< 0.01). There was no association between LAA% and indices of bronchodila-tion test (⊿FVC, ⊿FVC%, ⊿FEV1, ⊿FEV1%) (P > 0.05). Conclusions The severity of emphysema measured by HRCT is well correlated with the clinical symptoms , pulmonary function tests and exercise capacity in COPD patients. It can be used to diagnose emphysema early and to evaluate the severity of the disease com-prehensively. Thus, the risk factors of COPD can be controlled and the prognosis of the patients can be im-proved.