中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (27): 4029-4035.doi: 10.3969/j.issn.2095-4344.2016.27.011

• 脑及脊髓损伤动物模型 Animal models of brain and spinal cord injuries • 上一篇    下一篇

腺病毒介导脑源性神经营养因子与脑出血模型大鼠内源性神经干细胞的分化

谢  强1,王  飞1,周国平1,张  惠2,马进显1   

  1. 南阳市中心医院,1神经外科二病区,2耳鼻喉二病区,河南省南阳市  473000
  • 修回日期:2016-04-27 出版日期:2016-06-30 发布日期:2016-06-30
  • 作者简介:谢强,男,1980年生,河南省南召县人,汉族,硕士,主治医师,主要从事烟雾病研究。

Adenovirus-mediated brain-derived neurotrophic factor and endogenous neural stem cell differentiation in a rat model of cerebral hemorrhage

Xie Qiang1, Wang Fei1, Zhou Guo-ping1, Zhang Hui2, Ma Jin-xian1   

  1. 1Second Ward, Department of Neurosurgery, Nanyang City Center Hospital, Nanyang 473000, Henan Province, China; 2Second Ward, Department of Otorhinolaryngology, Nanyang City Center Hospital, Nanyang 473000, Henan Province, China
  • Revised:2016-04-27 Online:2016-06-30 Published:2016-06-30
  • About author:Xie Qiang, Master, Attending physician, Second Ward, Department of Neurosurgery, Nanyang City Center Hospital, Nanyang 473000, Henan Province, China

摘要:

文章快速阅读:

文题释义:
神经营养因子:
具有多种功能,可对损伤后感觉神经元的存活予以有效维持,促进神经纤维的延伸,并对神经前体细胞的分化产生良好的调节作用。神经营养因子具有维持神经干细胞的存活,促进脑源性神经干细胞增殖、分化及迁移,抑制细胞凋亡,营养神经元,保护和修复受损神经等效应,有助于中枢神经系统损伤后神经的再生及修复。
神经干细胞治疗脑出血:可采取两种策略,一种是内源性神经干细胞的活化,另外一种是外源性神经干细胞的移植。在成体哺乳动物脑内,神经干细胞和神经祖细胞主要存在于脑的室管膜下区、齿状回等部位。当脑组织或脊髓组织损伤时,这些细胞在神经营养因子等因子的诱导下,向损伤部位迁移并分化为神经细胞,补充或替代损伤的上、下运动神经元。

 

摘要
背景:
以往的研究表明,神经营养因子具有多种功能,可对损伤后的神经元存活予以有效维持。
目的:利用腺病毒对脑源性神经营养因子进行介导,观察其对大鼠脑出血后内源性神经干细胞分化的影响。
方法:取90只SD大鼠,制备脑出血模型,脑出血后12 h开始腹腔注射5-溴脱氧尿嘧啶核苷,2次/d,连续注射10 d;造模成功后随机分为3组,每组30只,分别在脑部立体定位注射腺病毒载体、腺病毒介导脑源性神经营养因子、生理盐水,注射后1 d、3 d、1周、2周、3周、4周,评估神经功能缺失评分,检测脑出血后血肿周围区生长相关蛋白吸光度值;注射后4周,免疫双标检测5-溴脱氧尿嘧啶核苷/神经元、5-溴脱氧尿嘧啶核苷/神经胶质纤维酸性蛋白的表达。
结果与结论:①随着时间的推移,3组神经功能缺失评分不断减小,腺病毒介导脑源性神经营养因子组注射1-4周的神经功能缺失评分低于腺病毒载体组、生理盐水组(P < 0.05);②随着时间的推移,3组血肿周围区生长相关蛋白平均吸光度值先升高后降低,腺病毒介导脑源性神经营养因子组注射3 d-4周的血肿周围区生长相关蛋白平均吸光度值均高于腺病毒载体组、生理盐水组(P < 0.05);③腺病毒介脑源性神经营养因子组5-溴脱氧尿嘧啶核苷/神经元、5-溴脱氧尿嘧啶核苷/神经胶质纤维酸性蛋白双阳性率显著高于腺病毒载体组、生理盐水组(P < 0.05);④结果表明,利用腺病毒对脑源性神经营养因子进行介导并对脑出血大鼠进行干预,可有效促进内源性神经干细胞的分化,促进动物神经功能的恢复。

 

 

关键词: 实验动物, 神经损伤与修复动物模型, 腺病毒, 病毒介导, 脑源性神经营养因子, 脑出血, 内源性神经干细胞

Abstract:

BACKGROUND: Previous studies showed that neurotrophic factor has a variety of functions, which can effectively maintain the survival of neurons after injury.
OBJECTIVE: To observe the effect of adenovirus-mediated brain-derived neurotrophic factor on the differentiation of endogenous neural stem cells after intracerebral hemorrhage in rats.
METHODS: A total of 90 Sprague-Dawley rat models of cerebral hemorrhage were made. At 12 hours after cerebral hemorrhage, 5-bromodeoxyuridine (BrdU) was intraperitoneally injected, twice a day, for 10 consecutive days. After model establishment, rats were randomly divided into three groups, 30 rats in each group, and were respectively subjected to brain stereotaxic injection of adenovirus vector, adenovirus-mediated brain-derived neurotrophic factor and physiological saline. At 1 day, 3 days, 1 week, 2 weeks, 3 weeks, and 4 weeks, neurological deficit score was evaluated. Absorbance value of growth associated protein around the area of hematoma after intracerebral hemorrhage was measured. At 4 weeks after injection, double immunostaining was used to detect the expression of BrdU/NeuN and BrdU/glial fibrillary acidic protein (GFAP). 
RESULTS AND CONCLUSION: (1) With the passage of time, nerve function defect score decreased in the three groups. At 1-4 weeks after injection, nerve function deficit scores were lower in the adenovirus-mediated brain-derived neurotrophic factor group than that in the adenovirus vector group and saline group (P < 0.05). (2) With the passage of time, the average absorbance of three groups in the peri-hematoma region first increased and then decreased. The absorbance value was higher in the adenovirus-mediated brain-derived neurotrophic factor group than in the adenovirus vector group and saline group at 3 days-4 weeks (P < 0.05). (3) BrdU/NeuN and BrdU/GFAP rates were significantly higher in the adenovirus-mediated brain-derived neurotrophic factor group than that of adenovirus vector group and saline group (P < 0.05). (4) The results show that the brain-derived neurotrophic factor mediated by adenovirus, and intervention on cerebral hemorrhage in rats can effectively promote the differentiation of endogenous neural stem cells, and promote the recovery of neural function in animal.

 

 

Key words: Cerebral Hemorrhage, Brain-Derived Neurotrophic Factor, Neural Stem Cells, Tissue Engineering

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