骨髓间充质干细胞移植对损伤血管的内皮修复作用

目的探讨兔颈动脉粥样硬化狭窄血管成形术后,骨髓间充质干细胞(BMSC)移植对损伤血管内皮修复的影响及可能机制。方法制作兔颈动脉粥样硬化狭窄模型48只,随机分成BMSC移植组(n=24)和对照组(n=24)。体外培养兔BMSC,流式细胞仪鉴定BMSC表面标志,DAPI标记后备用。球囊损伤颈动脉的即刻,BMSC移植组以107/kg的细胞数经颈外动脉移植到损伤动脉局部,对照组注射等量的PBS液。术前及细胞移植后3、7、14及28天采集外周血用ELISA法测定血管内皮生长因子水平。移植后7天取材观察DAPI标记BMSC的归巢。移植后14天免疫组织化学染色检测损伤血管组织的血小板-内皮细胞黏附分子(CD31)的表达;移植后28天HE染色后测定损伤血管新生内膜面积、新生内膜面积/中膜面积及再狭窄率。结果 BMSC移植组在移植后各时间点血管内皮生长因子水平均显著高于对照组(P<0.01)。移植后7天BMSC移植组损伤血管的内膜表面见DAPI标记的BMSC。移植后14天血管内膜有CD31的连续性表达,对照组没有表达。与对照组比较,移植后28天BMSC移植组血管新生内膜面积(0.092±0.009比0.189±0.007,P<...

Effect of Bone Marrow Mesenchymal Stem Cells Transplantation on Repairment of Injured Vascular Endothelial

Aim To investigate the effect and possible mechanism of bone marrow mesenchymal stem cells(BMSC)transplation on reparing injured vessels endothelium after carotid atherosclerosis stenosis angioplasty in rabbits.Methods Carotid atherosclemsis stenosis model of 48 rabbits had been successfully built up and randomly divided into BMSC transplantation group(n=24) and control group(n=24).BMSC were obtained by density gradient centrifugation and adherent cultured.Surface markers of BMSC were detected by flow cytom...