摘要
目的研究神经生长因子(NGF)与丹参对缺血再灌注后海马神经元的保护作用。方法 54只健康成年雄性Z:ZCLA长爪沙鼠随机分为生理盐水对照组、NGF治疗组、丹参治疗组,通过尼氏染色观察各组缺血再灌注后不同时间点(6h、3d和7d)海马CA1区锥体神经元的存活状况,通过免疫组化染色观察免疫组化结果。结果全脑缺血再灌注6h后,海马CA1区基本未见死亡神经元;与6h组相比,3d组和7d组死亡神经元明显增加(P<0.05);与生理盐水组相比,NGF或丹参治疗3d组和7d组死亡神经元明显减少(P<0.05);两个治疗组第3天神经细胞元死亡数无明显差别,而第7天NGF治疗组效果明显优于丹参治疗组(P<0.05);Bcl-2在NGF组表达最高;同组内不同时间相比,Bcl-2在6h表达最高;Bax在生理盐水组有阳性表达,同组内不同时间相比,Bax表达没有明显差异。结论 NGF与丹参均对脑缺血再灌注后损伤有保护作用,NFG优于丹参,为中风病人使用脑保护剂或中药治疗可减轻缺血造成的再损伤提供了依据。
Objective To study the protective effects of nerve growth factor （NGF） and Danshen on hippocampal neurons in gerbils （Meriones unguiculatus） with global ischemia-reperfusion injury. Method Global ischemia-reperfusion model was established in 54 male Z：ZCLA gerbils by occlusion of the bilateral carotid arteries. The animal models were randomized into 3 groups to receive treatment with normal saline, NGF, and Danshen 30 min after the reperfusion. At 6 h, 3 and 7 days after the reperfusion, the survival of the hippocampal CA1 pyramidal neurons was observed using optical and electron microscopy, and immunohistochemistry was employed to detect the expressions of Bcl-2 and Bax in the neurons. Results Neuronal apoptosis was not observed in the hippocampus 6 h after the reperfusion, but at 3 and 7 days, the number of apoptotic neurons increased significantly in the CA1 region. Compared with normal saline, treatments with NGF and Danshen both significantly reduced the number of apoptotic neurons at 3 and 7 days. The number of apoptotic neurons showed no significant difference between NGF and Danshen treatment groups at 3 days, but at 7 days, the apoptotic cell number was significantly lower in NGF group （P〈0.05）. Bcl-2 expression was the highest in NGF group, and its highest expression occurred at 6 h after the reperfusion; Bax expression was detected in saline group, and underwent no significant changes with the passage of time. Conclusion Both NGF and Danshen show protective effects against global ischemia-reperfusion injury. NGF has a stronger protective effect than Danshen, and this finding provides experimental evidence for selecting appropriate protective agents in the treatment of ischemic brain damage
出处
《南方医科大学学报》
CAS
CSCD
北大核心
2011年第6期965-969,共5页
Journal of Southern Medical University
基金
国家自然科学基金(61072033)
白云区科技攻关计划项目(2009-SZ-38)~~
