脑梗死患者外周血CD34+细胞水平与脑血管病危险因素的相关性

目的 观察急性脑梗死患者外周血CD34+细胞水平的变化,探讨其与脑血管病危险因素、神经功能缺损评分及颈动脉内膜-中层厚度(IMT)的相关性.方法 选择急性期脑梗死(发病72 h内)患者45例(梗死组)和具有脑血管危险因素的非脑梗死患者27例(高危组)为研究对象.记录两组患者脑血管病危险因素,包括酗酒史、吸烟史、冠心病、高血压、糖尿病、血清三酰甘油、总胆固醇、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)水平;通过流式细胞仪测定两组患者外周血CD34+细胞水平,再将两组外周血CD34+细胞水平与脑血管病危险因素进行相关性分析;分别记录梗死组神经功能缺损评分及颈动脉IMT,将外周血CD34+细胞水平与神经功能缺损评分及颈动脉IMT进行相关性分析.结果 (1)脑血管病危险因素中冠心病、高血压、糖尿病和LDL-C水平均与外周血CD34+细胞水平呈显著负相关(r分别为-0.749,-0.717,-0.688,-0.764),差异均有统计学意义(P＜0.01);(2)通过多元线性回归分析得出外周血CD34+细胞水平可以作为急性脑梗死的独立影响因素(P＜0.05);(3)梗死组患者外周血CD34+细胞水平低于高危组,其与神经功能缺损评分呈负相关(r=-0.721,P＜0.01),与颈动脉IMT亦呈负相关(r=-0.695,P＜0.01).结论 外周血CD34+细胞水平可以作为急性脑梗死的独立影响因素;急性脑梗死患者外周血CD34+细胞水平与神经功能缺损评分及颈动脉IMT呈显著负相关;外周血CD34+细胞水平可以作为缺血性脑卒中患者早期血管内皮功能的细胞学标志物.

Abstract：

Objective To observe the change of peripheral blood CD34+ cell level in patients with acute cerebral infarction, and explore its relationships with cerebrovascular risk factors,neurological function and carotid artery intima-media thickness (IMT). Methods The 45 patients with acute cerebral infarction (onset within 72 h) (infarction group) and 27 patients with cerebr ovascular risk factors but without cerebral infarction (high-risk group) were chosen for the study. The cerebrovascular disease risk factors including history of alcohol abuse, smoking, coronary heart disease, hypertension, diabetes, abnormal levels of serum triglycerides, total cholesterol,low-density lipoprotein cholesterol (LDL-C), and high density lipoprotein cholesterol (HDL-C) were recorded in all subjects. The peripheral blood CD34+ cell levels were measured by flow cytometry.The correlations of peripheral blood CD34+ cell level with cerebrovascular disease risk factors were analyzed. The neurological function and carotid artery IMT were recorded in infarction group, and the correlations of peripheral blood CD34+ cell level with neurological function and carotid artery IMT were analyzed. Results (1) The peripheral blood CD34+ cell level was significantly negatively correlated with coronary heart disease, hypertension, diabetes and LDL-C level (r =- 0. 749,-0. 717, - 0. 688, - 0. 764, all P＜0. 01) ; (2) Multiple linear regression analysis showed that peripheral blood CD34+ cell level was an independent relative factor of acute cerebral infarction (P＜0.05); (3) The peripheral blood CD34+ cell level was lower in infarction group than in high-risk group, and was significantly negatively correlated with neurological deficit score (r=-0. 721, P＜0.01) and carotid artery IMT (r= -0. 695, P＜0. 01). Conclusions Peripheral blood CD34+ cell level could be an independent relative factor of acute cerebral infarction; The peripheral blood CD34+ cell level is significantly negatively correlated with neurological function and carotid artery IMT in patients with acute cerebral infarction; And it can be used as cytological marker which reflect early vascular endothelial function in patients with ischemic stroke.     

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