Nestin and stem cell factor mRNA expression in neurons after rat cerebral ischemia-reperfusion injury
- VernacularTitle:脑缺血再灌注损伤后神经细胞巢蛋白和干细胞因子基因的表达
- Author:
Xiang LI
;
Zhengbin WANG
;
Shibao FANG
;
Qingli ZHENG
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2008;12(12):2379-2382
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND: Stem cell factors are hypoxia-induced neural regeneration factors. They stimulate animals' neural regeneration.OBJECTIVE: To observe Nestin and stem cell factor mRNA expressions after ischemia/reperfusion injury in rat brain, and to analyze the time rule of the two.DESIGN: A randomized controlled animal experiment.SETTING: Department of Ultrasound Diagnosis, Affdiated Hospital of Qingdao University Medical College.MATERIALS: Thirty-six healthy female adult Sprague-Dawley (SD) rats were provided by the Shanghai Laboratory Animal Center, Chinese Academy of Science. Nestin and stem cell factor mRNA in situ hybridization kits and 3,3'-diaminobenzidine (DAB)kit were provided by Boster Bioengineering Co.,Ltd (Wuhan, China).METHODS: This study was performed at the Shangdong Key Laboratory for Prevention and Treatment of Encephalopathy from January to June 2005. Thirty-two rats were created into models of ischemia/reperfusion models by occluding left middle cerebral artery with suture. At ischemia 1.5 hours and reperfusion 2, 6, 12, 24 hours, 2, 3, 7, 14 days, 4 rats were separately used in order to observe the expressions of Nestin and stem cell factor mRNA. The other 4 rats were used for sham-operation,in which, suture insertion was omitted, and the other procedures were identical to experimental groups. The expressions of Nestin and stem cell factor mRNA were detected in the cortex, corpora striatum and paraventricular nucleus region in rat brain by in situ hybridization.MAIN OUTCOME MEASURES: Nestin and stem cell factor mRNA expressions in the cortex, corpora striatum and paraventricular nucleus region in rat brain.RESULTS: Thirty-six rats were included in the final analysis. Nestin mRNA and stem cell factor were weakly expressed in the cortex, corpora striatum and paraventricular nucleus region in rats of sham-operation group. After ischemia/reperfusion, Nestin mRNA expression at each time point was significandy higher in the experimental groups (except in the cortex at ischemia 1.5 hours and reperfusion 2 hours, in the corpora striatum at ischemia 1.5 hours and reperfusion 2 and 6 hours and in the paraventricular nucleus region at ischemia 1.5 hours and reperfusion 2, 6 hours and 14 days) than in the sham-operation group (P＜0.05). While stem cell factor mRNA expression at each time point was significandy higher in the experimental groups (except in the cortex at ischemia 1.5 hours and reperfusion 2,6 and 12 hours, in the corpora striatum at ischemia 1.5 hours and reperfusion 2 and 6 hours and in the paraventricular nucleus region at ischemia 1.5 hours and reperfusion 2 hours and 14 days) than in the sham-operation group (P＜0.05).CONCLUSION: The time rule of stem cell factor mRNA expression is basically the same as that of neural stem cell proliferation. It indicates that following cerebral ischemia/reperfusion, stem cell factor mRNA expression may promote the proliferation of neural stem cells.
