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  • Title: Level and value of circulating endothelial progenitor cells in patients with acute myocardial infarction undergoing primary coronary angioplasty: in vivo and in vitro studies.
    Author: Chang HW, Leu S, Sun CK, Hang CL, Youssef AA, Hsieh YK, Yang CH, Cheng CI, Chen SM, Chen CJ, Chua S, Chang LT, Wu CJ, Yip HK.
    Journal: Transl Res; 2010 Oct; 156(4):251-63. PubMed ID: 20875902.
    Abstract:
    Levels of circulating endothelial progenitor cells (EPCs) in acute ST-elevation myocardial infarction (STEMI) patients undergoing primary coronary intervention (PCI) were investigated in this study. Flow cytometric analysis of the circulating EPC level (CD31/CD34 [E(1)], CD62E/CD34 [E(2)], and KDR/CD34 [E(3)]) was determined from blood samples of 161 consecutive patients with STEMI undergoing primary PCI. Angiogenesis was evaluated using mononuclear cell-derived EPCs on Matrigel. The EPC number (E(1-3)) was lower in STEMI patients than in normal subjects (n = 25) (P < 0.005). Patients with high EPCs (E(1-3)) (≥1.2%) had a lower left ventricular ejection fraction, elevated white blood cell count and creatinine level, advanced Killip score (≥class 3), more advanced congestive heart failure (CHF) (≥class 3), and increased 30-day mortality than those with a low EPC (E(1-3)) level (<1.2%) (P < 0.0001). Angiogenesis was lower in patients with a high EPC level than those with a low EPC level and normal controls (P < 0.001). Both the advanced Killip score and the CHF were independent predictors of increased EPC levels (P < 0.05). Multivariate analysis identified a high EPC (E(3)) level to be the most important predictor of increased 30-day major adverse clinical outcome (MACO) (P < 0.0001). In conclusion, the circulating EPC level is a major independent predictor of 30-day MACO in patients with STEMI undergoing primary PCI.
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