粒细胞集落刺激因子治疗大鼠局灶性脑缺血再灌注损伤

摘要/Abstract

摘要： 目的探讨粒细胞集落刺激因子(G-CSF)对大鼠局灶性脑缺血再灌注损伤的治疗作用.方法线栓法构建SD大鼠脑缺血再灌注损伤模型,线栓时间2 h.手术48 h后,对模型鼠神经功能缺失评分,将12分以下的20只大鼠随机平均分为两组:干预性治疗组:予G-CSF 20μg/(kg·d)皮下注射,共19 d;对照组皮下注射等量生理盐水,置同样环境饲养.两组同时腹膜腔注射脱氧溴化尿嘧啶(Brdu)10mg/kg共19 d.两组均于手术后每周进行神经系统功能缺失评测.术后3周,将实验鼠麻醉后处死取脑,脑沿冠状面将鼠脑切成等分,取第3块脑切块,做冰冻切片,行神经干细胞及神经胶质细胞特异性抗体与Brdu抗体免疫组化双染,观察梗死区新生神经细胞.结果手术后3周,与对照组比较,G-CSF治疗组神经功能恢复好于对照组(P<0.0);治疗组脑组织梗塞灶周围新生神经干细胞和神经胶质细胞增生明显多于对照组.结论 G-CSF能促进脑梗死后神经功能恢复和神经细胞再生,是一有效的脑缺血干预性治疗用药.

Abstract: Objective To study the therapeutic effects of granulocyte colony-stimulating factor (G-CSF) on focal cerebral ischemia-reperfusion injury in rats.Methods Adult male SD rats were subjected to transient (2 h) middle cerebral artery occlusion (MCAO) and scored 48 h later for such neurological functions as spontaneous movement, paresis, forelimb motor function, climbing ability, pain sensation, and position sense. Twenty rats with the total score less than 12 were divided equally into two groups to receive daily subcutaneous injection of 20 μg/kg of G-CSF for 19 days or the same dose of saline injection (control group). The rats in the two groups were also given intraperitoneal injection of Brdu10 mg/kg for 19 days. The neurological functions of the rats in both groups were examined on a weekly basis after MCAO and on day 21, the rats were killed to prepare frozen sections of the brain tissues for double immunohistochemical staining with Brdu and glial fibrillary acidic protein antibody to identify the neural cells newly evolved from the stem cells.Results The rats in G-CSF group showed better neurological function recovery than the control rats 3 weeks after MCAO (P<0.05). Obvious regeneration of the neural cells was observed around the infarction area in the rats receiving G-CSF treatment.Conclusion G-CSF promotes neurological function recovery and neural cell regeneration after cerebral infarction in rats and can be effective for intervention of focal cerebral ischemia-reperfusion injury.

中图分类号:

Q254
R651.1

陈松林, 张成, 黄文, 姚晓黎. 粒细胞集落刺激因子治疗大鼠局灶性脑缺血再灌注损伤[J]. 南方医科大学学报, 2005, 25(05): 503-507.

CHEN Song-lin, ZHANG Cheng, HUANG Wen, YAO Xiao-li. Effects of granulocyte colony-stimulating factor on focal cerebral ischemia- reperfusion injury in rats[J]. Journal of Southern Medical University, 2005, 25(05): 503-507.

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