TY - JOUR
T1 - Circulating Progenitor Cells Can Be Reliably Identified on the Basis of Aldehyde Dehydrogenase Activity
AU - Povsic, Thomas J.
AU - Zavodni, Katherine L.
AU - Kelly, Francine L.
AU - Zhu, Shoukang
AU - Goldschmidt-Clermont, Pascal J.
AU - Dong, Chunming
AU - Peterson, Eric D.
PY - 2007/12/4
Y1 - 2007/12/4
N2 - Objectives: Our objective was to develop and assess a novel endogenous progenitor cell (EPC) assay based on aldehyde dehydrogenase (ALDH) activity, and to define the relationship of ALDH-bright (ALDHbr) cells with previously defined EPCs, patient age, and extent of coronary artery disease. Background: Accurate assessment of circulating EPCs is of significant interest, yet current assays have limitations. Progenitor cells display high levels of ALDH activity. An assay based on ALDH activity may offer a simple means for enumerating EPCs. Methods: We simultaneously determined the numbers of EPCs based on ALDH activity and cell surface expression of CD133, CD34, and vascular endothelial growth factor receptor-2 in 110 patients undergoing cardiac catheterization. We assessed the reproducibility of these estimates, correlation among EPC assays, and the association of ALDHbr numbers with age and disease severity. Results: Aldehyde dehydrogenase-bright cells were easily identified in nonmobilized peripheral blood with median and mean frequencies of 0.041% and 0.074%, respectively. Aldehyde dehydrogenase-bright cells expressed CD34 or CD133 cell surface markers (57.0% and 27.1%, respectively), correlated closely with CD133+CD34+ cells (r = 0.72; p < 0.001), and differentiated into endothelial cells with greater efficiency than CD133+CD34+ cells. Aldehyde dehydrogenase-bright cell numbers were inversely associated with patient age and coronary disease severity. Conclusions: Aldehyde dehydrogenase activity represents a novel simplified method for quantifying EPCs. The correlation of ALDHbr cells with clinical factors and outcomes warrants further study.
AB - Objectives: Our objective was to develop and assess a novel endogenous progenitor cell (EPC) assay based on aldehyde dehydrogenase (ALDH) activity, and to define the relationship of ALDH-bright (ALDHbr) cells with previously defined EPCs, patient age, and extent of coronary artery disease. Background: Accurate assessment of circulating EPCs is of significant interest, yet current assays have limitations. Progenitor cells display high levels of ALDH activity. An assay based on ALDH activity may offer a simple means for enumerating EPCs. Methods: We simultaneously determined the numbers of EPCs based on ALDH activity and cell surface expression of CD133, CD34, and vascular endothelial growth factor receptor-2 in 110 patients undergoing cardiac catheterization. We assessed the reproducibility of these estimates, correlation among EPC assays, and the association of ALDHbr numbers with age and disease severity. Results: Aldehyde dehydrogenase-bright cells were easily identified in nonmobilized peripheral blood with median and mean frequencies of 0.041% and 0.074%, respectively. Aldehyde dehydrogenase-bright cells expressed CD34 or CD133 cell surface markers (57.0% and 27.1%, respectively), correlated closely with CD133+CD34+ cells (r = 0.72; p < 0.001), and differentiated into endothelial cells with greater efficiency than CD133+CD34+ cells. Aldehyde dehydrogenase-bright cell numbers were inversely associated with patient age and coronary disease severity. Conclusions: Aldehyde dehydrogenase activity represents a novel simplified method for quantifying EPCs. The correlation of ALDHbr cells with clinical factors and outcomes warrants further study.
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U2 - 10.1016/j.jacc.2007.08.033
DO - 10.1016/j.jacc.2007.08.033
M3 - Article
C2 - 18061073
AN - SCOPUS:36448961185
VL - 50
SP - 2243
EP - 2248
JO - Journal of the American College of Cardiology
JF - Journal of the American College of Cardiology
SN - 0735-1097
IS - 23
ER -