Abstract:
Background:Microparticles (MPs) are shedding membrane vesicles released from activated blood and endothelial cells under inflammatory conditions. The role of endothelial MPs (EMPs) in pathophysiology of COPD is relatively well known. However, the release and function of MPs of other cellular origins, eg, platelets, red blood cells and leukocytes, are not clearly evaluated in COPD. Purpose:The aim of this study was to measure EMPs and other cell-derived circulating MPs in stable and exacerbated COPD patients. Patients and methods:A total of 50 patients with COPD and 19 healthy volunteers were enrolled in the study. EMPs (CD31+, CD62E+) and platelet-derived (CD61+, CD41+, CD42a+, PAC1+), red blood cell-derived (GlyA+) and leukocyte-derived (CD45+, CD13+, CD14+, CD56+) MPs were measured. Flow cytometry (FC) was performed on Beckman Coulter FC500 analyzer. MP reference gate was set using 0.3-0.5-0.9 µm microbeads with MP size gates of 0.5-1.0 µm. Results:All the measured MPs were significantly (P<0.001) higher in COPD patients than in the controls. Furthermore, CD62E+, CD41+, CD42a+ and CD14+ MP values were significantly (P<0.001) increased in exacerbated COPD compared to stable COPD. These MPs showed significant (P<0.001) inverse correlation with FEV1/FVC, as well. Conclusion:In this study, we describe a reliable flow cytometric assay for MP analysis that was successfully applied in COPD. Besides EMPs, COPD is accompanied by an increased concentration of various MPs in the systemic circulation; particularly, platelet- and monocyte-derived MPs seem to be important in exacerbation.
journal_name
Int J Chron Obstruct Pulmon Disauthors
Tőkés-Füzesi M,Ruzsics I,Rideg O,Kustán P,Kovács GL,Molnár Tdoi
10.2147/COPD.S175607subject
Has Abstractpub_date
2018-11-15 00:00:00pages
3749-3757eissn
1176-9106issn
1178-2005pii
copd-13-3749journal_volume
13pub_type
杂志文章abstract:BACKGROUND AND OBJECTIVE:The overprescription of inhaled corticosteroids (ICS) in the current Global Initiative for Chronic Obstructive Lung Disease (GOLD) group A and B patients with chronic obstructive pulmonary disease (COPD) is not uncommon in clinical practice. The aim of this study was to explore the factors asso...
journal_title:International journal of chronic obstructive pulmonary disease
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journal_title:International journal of chronic obstructive pulmonary disease
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pub_type: 杂志文章,多中心研究
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pub_type: 杂志文章,随机对照试验
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