To induce the growth and differentiation of dendritic cells (DCs) from human cord blood, CD34 + cells isolated from human cord blood by mini MACS were cultured in a liquid culture system with rhSCF, rhGM CSF, rhTNF α...To induce the growth and differentiation of dendritic cells (DCs) from human cord blood, CD34 + cells isolated from human cord blood by mini MACS were cultured in a liquid culture system with rhSCF, rhGM CSF, rhTNF α and rhFL for 10 days. Then the induced cells were characterized by DC′s morphological and phenotypic properties. In addition, they stimulated the proliferation of allogeneic T cells and possessed an efficient capacity for initiating T cell dependent antitumor immune responses in vitro. It is concluded that mature DCs could be obtained from human cord blood CD34 + cells.展开更多
目的观察体外增殖的人脐带血CD34+细胞对缺血肢体血管生成的影响,探讨CD34+细胞与血管生成的关系。方法采集人脐血细胞并进行CD34+细胞的提取、培养。建立小鼠左后肢缺血模型并随机分为CD34+细胞增殖组(n=5)、CD34+细胞组(n=5)和空白对...目的观察体外增殖的人脐带血CD34+细胞对缺血肢体血管生成的影响,探讨CD34+细胞与血管生成的关系。方法采集人脐血细胞并进行CD34+细胞的提取、培养。建立小鼠左后肢缺血模型并随机分为CD34+细胞增殖组(n=5)、CD34+细胞组(n=5)和空白对照组(n=5)3组。采用Di I标记CD34+细胞示踪显像和抗人核抗原抗体(HNA)免疫组织化学方法评估人CD34+细胞向缺血区域的迁移能力,肢体温度、CD31免疫组织化学方法和转化生长因子β1(TGF-β1)m RNA表达评估缺血肢体血流改善情况。结果 Di I标记示踪及HNA显色可见扩增的CD34+细胞出现在小鼠缺血下肢的肌肉组织中并分布在血管周围。注射液体后第14天(t=5.421,P=0.001;t=0.616,P=0.000)和第28天(t=10.780,P=0.000;t=12.123,P=0.000),CD34+细胞增殖组和CD34+细胞组的温度改变百分比均明显高于对照组。注射液体后第28天,CD34+细胞增殖组和CD34+细胞组毛细血管密度分别为592.3±24.6(t=26.386,P=0.000)和530.7±25.5(t=21.502,P=0.000),均明显高于对照组的219.7±19.9;CD34+细胞增殖组和CD34+细胞组的TGF-β1mRNA表达量分别为(0.578±0.050)(t=12.376,P=0.000)和(0.504±0.080)copies(t=7.098,P=0.000),均明显高于对照组的(0.224±0.040)copies。结论体外培养的人脐带血CD34+细胞能向缺血区富集并诱导血管生成,促进血流复通,有望成为治疗下肢缺血的有效途径。展开更多
文摘To induce the growth and differentiation of dendritic cells (DCs) from human cord blood, CD34 + cells isolated from human cord blood by mini MACS were cultured in a liquid culture system with rhSCF, rhGM CSF, rhTNF α and rhFL for 10 days. Then the induced cells were characterized by DC′s morphological and phenotypic properties. In addition, they stimulated the proliferation of allogeneic T cells and possessed an efficient capacity for initiating T cell dependent antitumor immune responses in vitro. It is concluded that mature DCs could be obtained from human cord blood CD34 + cells.
文摘目的观察体外增殖的人脐带血CD34+细胞对缺血肢体血管生成的影响,探讨CD34+细胞与血管生成的关系。方法采集人脐血细胞并进行CD34+细胞的提取、培养。建立小鼠左后肢缺血模型并随机分为CD34+细胞增殖组(n=5)、CD34+细胞组(n=5)和空白对照组(n=5)3组。采用Di I标记CD34+细胞示踪显像和抗人核抗原抗体(HNA)免疫组织化学方法评估人CD34+细胞向缺血区域的迁移能力,肢体温度、CD31免疫组织化学方法和转化生长因子β1(TGF-β1)m RNA表达评估缺血肢体血流改善情况。结果 Di I标记示踪及HNA显色可见扩增的CD34+细胞出现在小鼠缺血下肢的肌肉组织中并分布在血管周围。注射液体后第14天(t=5.421,P=0.001;t=0.616,P=0.000)和第28天(t=10.780,P=0.000;t=12.123,P=0.000),CD34+细胞增殖组和CD34+细胞组的温度改变百分比均明显高于对照组。注射液体后第28天,CD34+细胞增殖组和CD34+细胞组毛细血管密度分别为592.3±24.6(t=26.386,P=0.000)和530.7±25.5(t=21.502,P=0.000),均明显高于对照组的219.7±19.9;CD34+细胞增殖组和CD34+细胞组的TGF-β1mRNA表达量分别为(0.578±0.050)(t=12.376,P=0.000)和(0.504±0.080)copies(t=7.098,P=0.000),均明显高于对照组的(0.224±0.040)copies。结论体外培养的人脐带血CD34+细胞能向缺血区富集并诱导血管生成,促进血流复通,有望成为治疗下肢缺血的有效途径。
