Effect of mimetic apoE-derived peptide on subarachnoid hemorrhage and vasospasm in mice
- Author:
- No author available
- Journal Title:
- JOURNAL OF THE FOURTH MILITARY MEDICAL UNIVERSITY
- Issue:
- 12
- DOI:
- 10.3321/j.issn:1000-2790.2007.12.005
- Key Word:
- 蛛网膜下腔出血;拟apoE;apoE基因;脑血管痉挛
Abstract： 目的:探讨新合成的拟载脂蛋白E(apoE)对蛛网膜下腔出血(SAH)的治疗作用及机制.方法:55只C57BL6/JL小鼠随机分为:假手术组,SAH组,低剂量(SAH+apoE-1410,0.6 mg/Kg)组和高剂量(SAH+apoE-1410,1.2 mg/Kg)组.显微操作戳破右侧大脑中动脉(MCA)和大脑前动脉(ACA)分叉处造成SAH模型.术后30 min开始经尾静脉给药,每12 h一次,连用3 d.每日检测小鼠的一般精神状态、神经功能评分、综合运动能力评分.术后第3日测量MCA直径.结果:术后SAH组小鼠精神萎靡,食欲下降,有的难进食水,体质量下降,死亡率为42.8%.高、低剂量组与SAH组比较,一般症状明显减轻,死亡率分别为14.2%和18.8%,与SAH组比较,显著降低(P＜0.05).MCA直径在假手术组为(111.3±7.4)μm,与SAH组(55.2±17.8)μm比较,平均缩小了59%(P＜0.05);低、高剂量组MCA分别为(91.4±16.4)μm和(83.5±13.6)μm,与SAH组(55.2±17.8)μm比较,MCA痉挛程度下降(P＜0.05).神经功能评分在SAH组(6.7±1.8)明显低于假手术组(21.0±0.0,P＜0.05);高剂量组(10.6±4.8)、低剂量组(10.9±2.6)的神经功能评分分别明显高于单纯SAH组(6.7±1.8,P＜0.05);但在两个剂量组间未见差别(P＞0.05).综合运动能力评分在SAH组(58.8±25.7)明显低于假手术组(272.2±25.7,P＜0.05);高剂量组(95.5±13.2),低剂量组(95.6±18.5)的综合运动能力分别明显高于单纯SAH组(58.8±20.9,P＜0.05).结论:外源性拟apoE对SAH及脑血管痉挛有一定的治疗作用,其机制与降低神经系统对损伤的炎性反应有关,拟apoE有可能成为治疗SAH的新措施.
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