银杏叶提取物对缺血再灌注大鼠脑梗死体积及半胱氨酸蛋白酶表达的影响

Effects of Ginkgo biloba extract on volume of cerebral infarction and expression of caspase-3 in ischemic-reperfusion rats

目的研究银杏叶提取物(EGb)对缺血再灌注大鼠脑梗死体积及半胱氨酸蛋白酶(caspase)-3表达的影响。方法用线栓法制作脑缺血再灌注大鼠模型。小剂量EGb组及大剂量EGb组大鼠于实验前30min和缺血后1h分别予以EGb50mg/kg、100mg/kg腹腔注射。用氯化三苯四氮唑染色和免疫组化染色法观察大鼠脑梗死体积与脑组织caspase-3阳性细胞数;并与缺血再灌注组比较。结果小剂量EGb组和大剂量EGb组大鼠脑梗死体积[(83.4±2.9)mm3,(37.0±2.5)mm3]明显小于缺血再灌注组[(138.8±6.1)mm3](均P<0.01);脑组织caspase-3阳性细胞数[(12.15±1.42)、(7.41±1.55)个/高倍视野]明显少于缺血再灌注组[(26.85±1.63)个/高倍](均P<0.01);大剂量EGb组脑梗死体积及脑组织caspase-3阳性细胞数比小剂量EGb组明显减少(均P<0.01)。结论EGb可以减小缺血再灌注大鼠的脑梗死体积以及抑制caspase-3蛋白的表达;并且大剂量EGb的效果比小剂量EGb的更好。

Objective To study the effects of Ginkgo biloba extract(EGb) on the volume of cerebral infarction and expression of caspase-3 in ischemic-reperfusion rats.Methods Setting up the brain ischemic and reperfusion model in rats by Nagasawa way.Both groups rats treated with small dose of EGb and large dose of EGb were injected intraperitoneally with EGb 50 mg/kg and 100 mg/kg at 30 min before the trial and 1 h after cerebral ischemic respectively.The infarction volume and caspase-3 expression were detected by TTC...