神经干细胞脑脊液移植后存活及迁移规律研究

Survival and migration of neural stem cells in the brain of mice after ventricle transplantation

目的观察神经干细胞(NSC)经侧脑室穿刺法移植入小鼠脑内脑脊液(CSF)循环后其存活、迁移规律及接受移植小鼠的生长发育状况。方法将绿色荧光蛋白(GFP)标记的1×105 新鲜人源胚胎NSC悬液经侧脑室穿刺法移植入小鼠CSF循环,观察移植后小鼠的生长发育情况,并在移植后24 h、48 h、2周及10 周分别取脑行连续切片,通过荧光显微镜观察细胞存活及分布情况。结果在移植后的不同时间点,脑室内均可见到大量GFP阳性细胞,部分移植细胞向脑实质迁移,穹窿海马伞、海马、胼胝体、隔区、室管膜下区及血管壁旁均可见到GFP阳性细胞。此外,在穿刺针道周围也可见GFP阳性细胞。所有接受NSC移植的小鼠的生长发育良好,未见任何行为学异常表现,经10周观察未发现移植的NSC有成瘤现象。结论经侧脑室穿刺法移植的NSC可在宿主小鼠CSF循环良好存活,并具有向局部脑实质内迁移的能力。NSC移植对小鼠的生长发育无明显影响,具有较好的安全性。

ObjectiveTo investigate the survival and migration of the neural stem cells(NSC) in the cerebrospinal fluid (CSF) circle of mice after ventricle transplantation. MethodsNSC labeled with green fluorescence protein (GFP) were implanted into the lateral cerebral ventricle of the mice. The mice were killed at time point of 24 h, 48 h, 2 weeks and 10 weeks after transplantation. The brain sections were observed and the behaviors of the mice were evaluated. ResultsGFP-positive cells were found in the lateral cerebral ventricle.Some of them migrated into the parenchyma and located in fibria-fornix, hippocampus,corpus callusum, septum,subventricle zone and beside the blood vessels at the time point of 2 weeks and 10 weeks. There were no obvious complications occured during operations which affected the outcome of growth and development. ConclusionNSC not only can survive, but also can migrate into the local parenchyma of the brain after ventricle transplantation. There were no obvious complications occured after the transplantation of NSC.