非促分裂型haFGF对小鼠脑缺血/再灌注损伤的保护作用

目的研究非促分裂型人类aFGF(nm-haFGF)对脑缺血/再灌注损伤的保护作用及初步机制。方法采用跳台法和Y型电迷宫法,观察nm-haFGF对脑缺血/再灌注损伤小鼠学习记忆的影响;测定进入脑组织的依文思蓝的多少,观察nm-haFGF对脑缺血/再灌注损伤小鼠血脑屏障损伤修复程度的影响;测定实验小鼠脑组织中NO含量,观察nm-haF-GF对脑缺血/再灌注损伤小鼠脑组织生化指标的影响。结果nm-haFGF能提高脑缺血/再灌注损伤小鼠的学习记忆功能,降低其脑组织依文思蓝和NO的含量。结论nm-haFGF可改善脑缺血/再灌注损伤小鼠的学习记忆功能,改善和减轻血脑屏障损伤程度,降低脑缺血/再灌注损伤引起的NO增高,对脑血管、脑神经组织具有保护效应。

Protective effect of non-mitogenic haFGF on cerebral ischemia-reperfusion injury in mice

Aim To investigate the protective effect of non-mitogenic human acidic fibroblast growth factor (nm-haFGF) on cerebral ischemia-reperfusion injury in mice. Methods Cerebral ischemia-reperfusion model was made by ligating bilateral carotid for 20 minutes in mice. These mice were randomly divided into model group( iv NS), two doses of nm-haFGF (iv 25、50 μg·kg-1) groups, rhaFGF group(iv 50 μg·kg-1) and sham- operated group. Step down test and Y-type electric maze were used to examine the effect of nm-haFGF on learning and memory of mice, then Even′s Blue(EB) level and NO level in brain of these mice were measured. Results The nm-haFGF significantly decreased numbers of errors of mice in 5 min in step down test and in Y-type electric maze test; EB and NO levels in brain of these mice were lower than those of model group respectively. Conclusion The nm-haFGF can protect cerebral ischemia-reperfusion injury in mice.