TY - JOUR
T1 - Endothelial microparticles in mild chronic obstructive pulmonary disease and emphysema
T2 - The multi-ethnic study of atherosclerosis chronic obstructive pulmonary disease study
AU - Thomashow, Michael A.
AU - Shimbo, Daichi
AU - Parikh, Megha A.
AU - Hoffman, Eric A.
AU - Vogel-Claussen, Jens
AU - Hueper, Katja
AU - Fu, Jessie
AU - Liu, Chia Ying
AU - Bluemke, David A.
AU - Ventetuolo, Corey E.
AU - Doyle, Margaret F.
AU - Barr, R. Graham
PY - 2013/7/1
Y1 - 2013/7/1
N2 - Rationale: Basic research implicates alveolar endothelial cell apoptosis in the pathogenesis of chronic obstructive pulmonary disease (COPD) and emphysema. However, information on endothelial microparticles (EMPs) in mild COPD and emphysema is lacking. Objectives:We hypothesized that levels of CD31+ EMPs phenotypic for endothelial cell apoptosis would be elevated in COPD and associated with percent emphysema on computed tomography (CT). Associations with pulmonary microvascular blood flow (PMBF), diffusing capacity, and hyperinflation were also examined. Methods: The Multi-Ethnic Study of Atherosclerosis COPD Study recruited participants with COPD and control subjects age 50-79 years with greater than or equal to 10 pack-years without clinical cardiovascular disease. CD31+ EMPs were measured using flow cytometry in 180 participants who also underwent CTs and spirometry. CD62E+ EMPs phenotypic for endothelial cell activation were also measured. COPD was defined by standard criteria. Percent emphysema was defined as regions less than 2950 Hounsfield units on full-lung scans. PMBF was assessed on gadolinium-enhanced magnetic resonance imaging. Hyperinflation was defined as residual volume/total lung capacity. Linear regression was used to adjust for potential confounding factors. Measurements and Main Results: CD31+ EMPs were elevated in COPD compared with control subjects (P = 0.03) and were notably increased in mild COPD (P = 0.03). CD31+ EMPs were positively related to percent emphysema (P = 0.045) and were inversely associated with PMBF (P = 0.047) and diffusing capacity (P = 0.01). In contrast, CD62E + EMPs were elevated in severe COPD (P = 0.003) and hyperinflation (P = 0.001). Conclusions: CD31+ EMPs, suggestive of endothelial cell apoptosis, were elevated in mild COPD and emphysema. In contrast, CD62E + EMPs indicative of endothelial activation were elevated in severe COPD and hyperinflation.
AB - Rationale: Basic research implicates alveolar endothelial cell apoptosis in the pathogenesis of chronic obstructive pulmonary disease (COPD) and emphysema. However, information on endothelial microparticles (EMPs) in mild COPD and emphysema is lacking. Objectives:We hypothesized that levels of CD31+ EMPs phenotypic for endothelial cell apoptosis would be elevated in COPD and associated with percent emphysema on computed tomography (CT). Associations with pulmonary microvascular blood flow (PMBF), diffusing capacity, and hyperinflation were also examined. Methods: The Multi-Ethnic Study of Atherosclerosis COPD Study recruited participants with COPD and control subjects age 50-79 years with greater than or equal to 10 pack-years without clinical cardiovascular disease. CD31+ EMPs were measured using flow cytometry in 180 participants who also underwent CTs and spirometry. CD62E+ EMPs phenotypic for endothelial cell activation were also measured. COPD was defined by standard criteria. Percent emphysema was defined as regions less than 2950 Hounsfield units on full-lung scans. PMBF was assessed on gadolinium-enhanced magnetic resonance imaging. Hyperinflation was defined as residual volume/total lung capacity. Linear regression was used to adjust for potential confounding factors. Measurements and Main Results: CD31+ EMPs were elevated in COPD compared with control subjects (P = 0.03) and were notably increased in mild COPD (P = 0.03). CD31+ EMPs were positively related to percent emphysema (P = 0.045) and were inversely associated with PMBF (P = 0.047) and diffusing capacity (P = 0.01). In contrast, CD62E + EMPs were elevated in severe COPD (P = 0.003) and hyperinflation (P = 0.001). Conclusions: CD31+ EMPs, suggestive of endothelial cell apoptosis, were elevated in mild COPD and emphysema. In contrast, CD62E + EMPs indicative of endothelial activation were elevated in severe COPD and hyperinflation.
KW - Antigens
KW - CD31
KW - Chronic obstructive pulmonary disease
KW - Emphysema
KW - Endothelium; pulmonary disease
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U2 - 10.1164/rccm.201209-1697OC
DO - 10.1164/rccm.201209-1697OC
M3 - Article
C2 - 23600492
AN - SCOPUS:84880145905
SN - 1073-449X
VL - 188
SP - 60
EP - 68
JO - American journal of respiratory and critical care medicine
JF - American journal of respiratory and critical care medicine
IS - 1
ER -