丹酚酸B对脑缺血再灌注大鼠神经细胞损伤和神经发生的影响

被引:25
作者
钟静 [1 ]
唐民科 [1 ]
张妍 [1 ]
徐秋萍 [1 ]
张均田 [2 ]
机构
[1] 北京中医药大学
[2] 中国医学科学院、中国协和医科大学药物研究所
关键词
丹酚酸B; 脑缺血; 5-溴脱氧尿嘧啶核苷; 海马;
D O I
10.16438/j.0513-4870.2007.07.006
中图分类号
R285.5 [中药实验药理];
学科分类号
摘要
本文旨在观察丹酚酸B对脑缺血再灌注大鼠神经发生和神经细胞损伤的影响,探讨丹酚酸B促进机体功能恢复的作用环节。研究采用大鼠局灶性脑缺血再灌注模型,治疗给药,用BrdU法观察海马齿状回颗粒下层(sub-granular zone,SGZ)和侧脑室下层(sub-ventricular zone,SVZ)神经发生的变化;尼氏体染色观察神经细胞损伤;平衡杆法观察肢体功能恢复。结果显示,缺血后再灌注7d,模型组SGZ和SVZ的BrdU细胞明显多于假手术组(P<0.05),丹酚酸B(10mg.kg-1)显著增加SGZ和SVZ的BrdU细胞数目(P<0.01vs模型组);缺血再灌注14d,模型动物缺血侧海马CA1区和皮层神经细胞明显减少,丹酚酸B(10mg.kg-1)明显改善神经细胞损伤(P<0.01vs模型组);同时,丹酚酸B(10mg.kg-1)明显促进缺血动物肢体功能恢复。以上结果表明,丹酚酸B能够增加脑缺血大鼠SVZ和SGZ的BrdU细胞数目,改善缺血区神经细胞损伤,促进肢体功能恢复,提示促进神经发生是丹酚酸B改善脑功能的重要环节。
引用
收藏
页码:716 / 721
页数:6
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