人神经干细胞体外诱导分化及在体裸鼠胃肠道的移植

目的:探索人神经干细胞体外诱导分化,以及在体移植人裸鼠(免疫缺陷小鼠)幽门部后的存活及分化状况.方法:取10周左右流产人胚胎神经干细胞,体外悬浮培养、传代和诱导分化,用免疫荧光方法检测神经干细胞标志物神经上皮干细胞蛋白(nestin)、肠道神经细胞标志蛋白基因产物9.5(protein gene product 9.5,PGP9.5)和神经胶质细胞标志物胶质纤维酸性蛋白(glial fibrillary acidic protein,GFAP);取体外悬浮培养3个月的人神经干细胞移植入裸鼠的幽门部,检测神经十细胞在幽门局部的存活和分化状况.结果:免疫荧光染色显示体外培养的人神经干细胞nestin阳性,诱导分化后PGP9.5和GFAP阳性.将人神经干细胞移植入裸鼠幽门部后连续检测到第6周,可见细胞存活,但免疫荧光染色未能榆测到神经细胞和神经胶质细胞的分化标志.结论:人神经干细胞可以成功地在体外培养、传代和诱导分化,移植入裸鼠幽门部后可在局部存活,对干细胞移植治疗胃肠道神经系统失调性疾病进行了初步探索.

Study on human neural stem cells differentiation in vitro and transplantation in nude mice

Objective:To investigate the differentiation of human neural stem cells(hNSCs) in vitro and to assess the potential of hNSCs transplanted into the pylorus of nude mice.Methods:Central nervous system-derived hNSCs(CNS-hNSCs) were obtained from the subventricular zone of aborted fetus brain(10weeks),suspension cultured,passaged and induced to differentiate in vitro.Stem cell marker neuroepithelial stem cell protein(nestin),enteric neuronal marker protein gene production 9.5(PGP9.5) and glial cell marker glial...