【摘要】 本研究收集健康成人骨髓单个核细胞,用血管内皮生长因子等加以诱导分化,通过荧光显微镜和荧光免疫标记等方法观察和鉴定诱导后的细胞。之后将诱导分化的内皮祖细胞种植到聚氨酯小径人工血管表面,予以15 dyn／cm2的流体切应力处理,并用扫描电镜观察。结果发现外周血单个核细胞诱导分化成为内皮祖细胞,ac- LDL及lectin抗体荧光标记阳性。扫描电镜下,未种植细胞的聚氨酯小径人工血管表面孔径大小比较适合内皮祖细胞爬行;静态种植细胞后,人工血管表面内皮祖细胞排列不整齐;切应力条件下种植细胞后,人工血管表面内皮祖细胞排列较为整齐。因此,在体外能将外周血单个核细胞诱导分化成为内皮祖细胞,内皮祖细胞是小径人工血管内皮化的理想种子细胞。流体切应力对小径聚氨酯人工血管表面内皮祖细胞的生长排列有着良好的机械塑形作用。更多还原

【Abstract】 In this study, the peripheral blood mononuclear cells of healthy adult were acquired and inducted by vascular endothelial growth factor, et cetera. The differentiated endothelial cells were observed and identified as EPCs by the double positive staining of fluorescent labeled acetylated-LDL and lectin, seeded on the polyurethane small-diameter artificial vessels, treated by shear stress of 15 dyn/cm2, and observed by scanning electronic microscopy. As a result, the peripheral blood mononuclear cells differentiated into EPCs. They were positively stained by labeled acetylated-LDL and lectin. Under observation of scanning electronic microscope, the unseeded polyurethane small-diameter artificial vessel being suited for the growth and spreading of the cells; the cell lineage on surface of artificial vessels of stationary group being arrayed in chaos, and that of shear stress group being arrayed in direction. Therefore, the peripheral cells can differentiate into EPCs, and EPCs can be used as novel source cells for the accelerated endothelialization of small diameter artificial vessel. Shear stress contributes to the mechanic moulding of cell lineage on the surface of artificial vessel.更多还原