中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (32): 5199-5203.doi: 10.3969/j.issn.2095-4344.2015.32.021

• 干细胞移植 stem cell transplantation • 上一篇    下一篇

神经干细胞移植脑出血恢复期大鼠神经功能和促血管生成素1及受体的表达

任虹宇,李明轩,何  承,樊永丽,马建功,司昊天,方树民,张小广,王晓斌   

  1. 河南大学第一附属医院,河南省开封市  475000
  • 出版日期:2015-08-06 发布日期:2015-08-06
  • 通讯作者: 何承,主任医师,教授,河南大学第一附属医院,河南省开封市 475000
  • 作者简介:任虹宇,男,1985年生,河南省鹿邑县人,汉族,2015年河南大学毕业,硕士,医师,就职于河南大学第一附属医院,主要从事神经外科疾病的临床与基础研究。
  • 基金资助:

    2011年河南省医学科技攻关计划项目(2011020110)

Neurologic function and expression of angiopoietin-1 and its receptor at recovery stage of cerebral hemorrhage after neural stem cell transplantation in rats

Ren Hong-yu, Li Ming-xuan, He Cheng, Fan Yong-li, Ma Jian-gong, Si Hao-tian, Fang Shu-min,
Zhang Xiao-guang, Wang Xiao-bin   

  1. First Affiliated Hospital of Henan University, Kaifeng 475000, Henan Province, China
  • Online:2015-08-06 Published:2015-08-06
  • Contact: He Cheng, Chief physician, Professor, First Affiliated Hospital of Henan University, Kaifeng 475000, Henan Province, China
  • About author:Ren Hong-yu, Master, Physician, First Affiliated Hospital of Henan University, Kaifeng 475000, Henan Province, China
  • Supported by:

    the Medical Science Key Project of Henan Province in 2011, No. 2011020110

摘要:

背景:近年研究发现骨髓间充质干细胞经过长时间体外培养后,可自然分化为神经干细胞,从而再定向分化为神经细胞及神经胶质细胞,为帕金森病、脑梗死后遗症、小脑萎缩和脑发育不良等疾病的治疗提供了一种新的思路。
目的:探讨神经干细胞移植对脑出血恢复期大鼠神经功能的影响及其作用机制。
方法:将60只雄性SD大鼠按照随机数字表法分为正常组(18只)、脑出血组(21只)和移植组(21只),后2组大鼠采用Ⅶ型胶原酶诱导法建立大鼠脑出血模型,造模21 d后移植组大鼠通过尾静脉注射神经干细胞,脑出血组给予等量生理盐水。移植后第7,14,21天进行改良黏附物移除试验(MST)评分,评分结束后处死各组大鼠,采用RT-PCR法测定大鼠出血周围脑组织促血管生成素1 mRNA表达,采用Western Blotting法检测大鼠出血周围脑组织酪氨酸激酶受体2蛋白表达。
结果与结论:与正常组相比,脑出血组和移植组各时点MST评分均明显降低,差异均有显著性意义(P < 0.05);从移植后7 d开始移植组各时点的MST评分均明显高于脑出血组,差异均有显著性意义(P < 0.05)。移植后7,14,21 d移植组和脑出血组促血管生成素1 mRNA和酪氨酸激酶受体2蛋白含量均明显高于正常组,且移植组升高更为明显,差异均有显著性意义(P均< 0.05)。结果表明神经干细胞移植能够有效促进脑出血恢复期大鼠神经功能的恢复,其机制可能与增加出血周围脑组织促血管生成素及酪氨酸激酶受体2的含量有关。

 中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 干细胞, 移植, 脑出血, 神经干细胞, 促血管生成素1, 酪氨酸激酶受体, 神经功能

Abstract:

BACKGROUND: Recent studies have found that bone marrow mesenchymal stem cells that cultured in vitro for a long time can naturally differentiate into neural stem cells, which then differentiate into neurons and glial cells, thereby providing a new therapeutic thinking for Parkinson’s disease, sequela of cerebral infarction, cerebellar atrophy and brain dysplasia.

OBJECTIVE: To discuss the influence of neural stem cell transplantation on neurologic function of rats with cerebral hemorrhage at recovery stage and the relevant mechanism of action.

METHODS: Sixty male Sprague-Dawley rats were randomly divided into normal group (n=18), cerebral hemorrhage group (n=21) and transplantation group (n=21). Cerebral hemorrhage models were established in the latter two groups using VII type collagen enzyme induction method. At 21 days of modeling, rats in the transplantation group were injected neural stem cells via the tail vein, and those in the other two groups received the same volume of normal saline. At 7, 14, 21 days after cell transplantation, modified adhesive removal test (MST) was employed to evaluate the neurologic function of rats, and then the rats were killed. RT-PCR was used to detect angiopoietin-1 mRNA expression in the bleeding tissues, and western blot assay was employed to measure tyrosine kinase receptor-2 protein expression. 

RESULTS AND CONCLUSION: Compared with the normal group, the MST scores in the cerebral hemorrhage group and transplantation group were significantly decreased (P < 0.05). From the 7th day after transplantation, MST scores in the transplantation group were significantly higher than those in the cerebral hemorrhage group (P < 0.05). At 7, 14, 21 days after transplantation, expressions of angiopoietin-1 mRNA and tyrosine kinase receptor-2 protein were ranked as follows: transplantation group > cerebral hemorrhage group > normal group, and there was a significant difference among the three groups (P < 0.05). These findings indicate that neural stem cell transplantation can effectively promote the neurologic recovery of rats with cerebral hemorrhage at recovery stage, and the concrete mechanism may be related to the increase of angiopoietin-1 mRNA and tyrosine kinase receptor-2 protein in the bleeding tissues.

 

Key words: Cerebral Hemorrhage, Neural Stem Cells, Angiopoietin-1, Receptor, TIE-2

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