Neurologic function and expression of angiopoietin-1 and its receptor at recovery stage of cerebral hemorrhage after neural stem cell transplantation in rats
10.3969/j.issn.2095-4344.2015.32.021
- VernacularTitle: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
- Author:
Hongyu REN
;
Mingxuan LI
;
Cheng HE
;
Yongli FAN
;
Jiangong MA
;
Haotian SI
;
Shumin FANG
;
Xiaoguang ZHANG
;
Xiaobin WANG
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2015;(32):5199-5203
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND:Recent studies have found that bone marrow mesenchymal stem cels that culturedin vitro for a long time can naturaly differentiate into neural stem cels, which then differentiate into neurons and glial cels, thereby providing a new therapeutic thinking for Parkinson’s disease, sequela of cerebral infarction, cerebelar atrophy and brain dysplasia.
OBJECTIVE:To discuss the influence of neural stem cel 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 colagen enzyme induction method. At 21 days of modeling, rats in the transplantation group were injected neural stem cels via the tail vein, and those in the other two groups received the same volume of normal saline. At 7, 14, 21 days after cel transplantation, modified adhesive removal test (MST) was employed to evaluate the neurologic function of rats, and then the rats were kiled. 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 folows: 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 cel 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.
