用于中枢神经系统Waller变性研究的新型大鼠视神经夹伤模型

被引:11
作者
刁金美 [1 ]
冯国栋 [1 ]
钱新宏 [2 ]
焦西英 [1 ]
游思维 [1 ]
机构
[1] 第四军医大学全军神经科学研究所
[2] 第四军医大学西京医院儿科
关键词
视神经; Waller变性; 动物模型; 大鼠;
D O I
暂无
中图分类号
R-332 [医用实验动物学];
学科分类号
1001 ;
摘要
本实验旨在建立可用于中枢神经系统Waller变性研究的大鼠视神经(ON)损伤模型。成年SD大鼠12只,用夹持力为148g、镊端宽1mm的小号动脉阻血镊于球后2mm处夹持左侧视神经,致伤时间10s。术后随机分为两组(每组6只):一组动物术后立即于双侧上丘表面放置逆行荧光染料荧光金(FG),72h后处死。取视网膜铺片,ON冰冻连续切片。另一组动物术后72h常规灌注固定,取ON冰冻连续切片,分别行β-tubulin及NF-160免疫组化染色和HE染色。结果显示:左侧ON夹伤后3d,同侧视网膜内未见FG逆行标记的视网膜神经节细胞,ON夹伤部位形成一条宽达1mm的损伤带,ON基质连续,FG标记的神经纤维被阻断于损伤远侧,损伤远侧的β-tublin阳性纤维多已崩溃,NF-160阳性纤维数量较多,部分纤维末梢形成膨大的回缩球。上述结果表明ON夹伤后神经元轴突完全离断,中枢神经基质的连续性得以保持,损伤远侧段轴突发生典型的Waller变性,从而为中枢神经Waller变性及其药物治疗研究的筛选和评估提供了简单实用的实验模型。
引用
收藏
页码:239 / 244
页数:6
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