title: [Dynamic changes of plasma VEGF, SDF-1 and peripheral CD34+ cells in patients with acute myocardial infarction].
abstract: OBJECTIVE
  To investigate the changes in plasma levels of vascular endothelial growth factor (VEGF) and stromal cell-derived factor-1 (SDF-1) and in peripheral CD34(+) cells in patients with acute myocardial infarction (AMI), and explore their role in AMI.
  
  
  METHODS
  Enzyme-linked immunoassay (ELISA) was employed for measuring the levels of VEGF and SDF-1 in AMI patients on days 1, 3, 7, 10, and 14 of onset and in normal control subjects. The absolute counts of CD34(+) in the peripheral blood were measured on days 1, 7, and 14 by flow cytometry in AMI patients, with their myocardial enzyme and troponin I detected and electrocardiography (ECG) and echocardiography (UCG) recorded.
  
  
  RESULTS
  Peripheral CD34(+) cells obviously increased on day 7 after AMI onset (2.35-/+0.72/microl vs 1.48-/+0.49/micro, P<0.05). VEGF levels were significantly higher in AMI patients than in the control subjects, reaching the peak level and on day 14 (197.56-/+39.87 vs 53.79-/+18.12 pg/ml, P<0.01). SDF-1 level obviously decreased on day 1 after AMI onset (1683.12-/+224.79 vs 2178.67-/+265.34 pg/ml, P<0.01), followed by gradually increased to the control level. Obvious correlation was noted between the level of VEGF on day 7 and the peak level of peripheral CD34(+) cells, and the peak plasma VEGF level was obviously associated with the peak serum CK-MB and troponin I levels.
  
  
  CONCLUSIONS
  The stem cells are mobilized into the peripheral blood in the event of AMI. Obviously increased VEGF level following AMI may persist for at least 2 weeks, whereas SDF-1 level undergoes temporary decrement after AMI. The dynamic changes of VEGF and SDF-1 can be related to the mobilization and homing of the stem cells to the injured myocardium.
authors.affiliation: Department of Cardiology, First Hospital of Xi'an Jiaotong University, Xi'an 710061, China. milanzhu1975@yahoo.com.cn
authors.forename: Zheng-rong
authors.initials: ZR
authors.lastname: Deng
authors.forename: Chun
authors.initials: C
authors.lastname: Yang
authors.forename: Ai-qun
authors.initials: AQ
authors.lastname: Ma
authors.forename: Xin-yi
authors.initials: XY
authors.lastname: Chen
authors.forename: Tao
authors.initials: T
authors.lastname: Geng
mesh_terms: D000328:Adult; D018952:Antigens, CD34 / Q000097:blood*; D054377:Chemokine CXCL12 / Q000097:blood*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D009203:Myocardial Infarction / Q000097:blood*; D013997:Time Factors; D042461:Vascular Endothelial Growth Factor A / Q000097:blood*
chemical_list: D018952:Antigens, CD34; D054377:Chemokine CXCL12; D042461:Vascular Endothelial Growth Factor A