灯盏花素对缺血再灌注鼠脑损伤的脑保护作用研究

目的：探讨灯盏花素对鼠脑梗塞面积、神经功能缺失征象及鼠脑缺血边缘区神经细胞凋亡的影响。方法：采用TTC染色、临床神经功能评分、流式细胞分析和原位末端标记等方法，分别对缺血、缺血再灌注及灯盏花素治疗组鼠脑梗塞面积、神经功能缺失征象、鼠脑缺血边缘区神经细胞的凋亡进行观察和比较。结果：24只大鼠缺血／再灌后TTC染色可见右侧顶叶皮质出现恒定苍白梗塞灶，灯盏花素治疗组于相同时间点脑梗塞面积较缺血／再灌组明显减小；缺血／再灌组大鼠均有明显的神经功能缺失征象，而药物治疗组12只大鼠中只有3只出现轻度的神经功能缺损。假手术组仅有极少量神经细胞凋亡，缺血90min／再灌12h、24h组缺血边缘区神经细胞凋亡明显增多，灯盏花素治疗组于相同时限内细胞凋亡较缺血／再灌组显著关少（P＜0.01）。结论：蛋白激酶C抑制剂灯盏花素能明显减小鼠脑缺血后脑梗塞面积，减轻脑缺血后神经功能缺损，显著减少缺血边缘区神经细胞凋亡数量，减缓缺血区神经元损害，具有显著的脑保护作用。

Study of erigeron on brain protection after cerebral ischemia and reperfusion in rats

Objective:To investigate the effect of erigeron on cerebral ischemic area, neurologic function deficits and neuroligic cells apoptosis following cerebral ischemia and reperfusion in rats. Methods: The middle cerebral artery (MCA) focal cerebral ischemia and reperfusion rat model were used. The cerebral ischemic area,neural function deficits and neural cells apotosis were measured by TTC staining, neurologic function scoring, flow cytometry and deoxynucleotidyl transferase mediated dUTP nick end labeling (TUNEL), respectively. Results: Significant reductions in infarct size were found in erigeron treated group compared with the control group. Furthermore, erigeron induced significant amelioration of neural cells died by apoptosis and neurologic dysfunction following cerebral ischemia and reperfusion in rats. Conclusions: Erigeron has remarkably brain protective effects.