›› 2011, Vol. 6 ›› Issue (09): 711-716.

• 论著 • 上一篇    下一篇

循环内皮祖细胞异位表达骨钙素在缺血性脑血管病发病中的作用

刘力1,李芬娥2,王雅杰1,刘志忠1,康熙雄1   

  1. 1 北京市首都医科大学附属北京天坛医院检验科2北京市仁和医院检验科
  • 收稿日期:2011-03-04 修回日期:2011-02-04 出版日期:2011-09-20 发布日期:2011-09-20
  • 通讯作者: 康熙雄

Abnormal Expression of Osteocalcin on Circulating Endothelial Progenitor Cells in Patients with Ischemic Cerebrovascular Diseases

LIU Li, LI Fen-E, WANG Ya-Jie, et al   

  • Received:2011-03-04 Revised:2011-02-04 Online:2011-09-20 Published:2011-09-20
  • Contact: KANG Xi-Xiong

摘要: 目的 检测缺血性脑血管病患者循环内皮祖细胞(endothelial progenitor cells,EPCs)表达骨钙素(osteocalcin,OCN)的绝对数量和相对比例,为评价血管病变提供参考指标。方法 采用病例对照研究方法,比较病例组(n=51)和对照组(n=30)缺血性脑血管病传统危险因素的差异;应用流式细胞仪检测外周血EPCs数量及OCN表达水平,建立logistic回归方程。结果 病例组EPCs数目、OCN阳性的EPCs数目以及其百分比均显著高于对照组(均P <0.01)。病例组中,钙化组OCN阳性的EPCs百分比高于非钙化组(P =0.033),而不同程度的脑血管狭窄组之间,OCN阳性的EPCs百分比差异无统计学意义(P =0.672)。OCN阳性的EPCs百分比是缺血性脑血管病发病的独立危险因素(优势比为1.143,95%可信区间为1.060~1.232)。结论 缺血性脑血管病患者循环EPCs表达OCN,对血管损伤具有负性影响,而非单一的修复作用。OCN阳性的EPCs可作为评价缺血性脑血管病变的细胞学指标。

关键词: 脑梗死; 骨钙素; 钙质沉着症; 干细胞; 动脉粥样硬化

Abstract: Objective To explore whether endothelial progenitor cells(EPCs) in patients with cerebrovasculardiseases could express high level of osteocalcin.Methods We studied 51 patients with acute cerebrovascular diseases and 30 sex- and age- matchedcontrol subjects. EPCs in peripheral blood mononuclear cells were analyzed by flow cytometry.Results Patients with cerebral ischemia had about three-fold increase of the number and thepercentage of osteocalcin positive(OCN+) EPCs compared with control group(P <0.01). Patients withvessel calcification had higher percentage of OCN+EPCs than those without calcification(P =0.033).However, the degree of stenosis had no direct correlation with osteocalcin expression(P =0.672).Logistic analysis showed that the percentage of OCN+EPCs was an independent risk factor forcerebral ischemia(odds ratio=1.143, 95% confidence intervals 1.060-1.232).Conclusion Circulating endothelial progenitor cells in patients suffering from cerebral ischemiacan express osteocalcin and act as a negative factor for vascular lesion rather than normal repair.The percentage of OCN+EPCs may be used as a potential cell marker for ischemic cerebrovasculardiseases.

Key words: Brain infarction; Osteocalcin; Calcinosis; Stem cells; Atherosclerosis