embolic middle cerebral artery occlusion rat
大鼠脑动脉栓塞可产生局灶性缺血损伤。血凝块与微球堵塞具有不同复通机制;微球堵塞另列模型119,不属于可溶解的血栓。
结局指标
存活脑组织染为红色、梗死区呈白色;以 2 mm 连续冠状切片逐孔染色成像后,测量患侧与对侧半球的梗死面积及总面积,计算患侧相对对侧的梗死面积百分比。
实验动物
- 年龄
- 成年(来源未报告具体周龄)
- 组织
- 脑组织(2 mm 冠状切片;梗死区与存活区)
- 年龄
- 成年(来源未报告具体周龄)
- 组织
- 脑组织(2 mm 冠状切片;梗死区与存活区)
实验步骤
TTC Staining TTC Staining The brain is removed from the skull and placed into a brain slicer mold placed in ice. Razor blades are positioned in the mold to obtain 2mm thick sections. Sections are placed in individual wells of a 24 well tissue culture dish with 500 μl of 2% TTC in 0.1M PBS. The plate is wrapped in foil and placed on a 37°C slide warmer for 30 minutes. TTC is removed and 500ul of fixative is added to each well for storage. Images of the sections are captured by Olympus S2H10 research stereo- microscope and Adobe Photoshop software. The infarct area and total area of the contralateral and ipsilateral hemispheres are measured with Scion image software (Scion Corporation). The percent infarct area is calculated as a percentage of the ipsilateral hemisphere relative to the contralateral hemisphere as previously described. [F2.JPG]]()
模型身份
- 模型名称
- embolic middle cerebral artery occlusion rat
- 物种
- rat
- NCBI Taxonomy ID
- 10116
生物学特性
- 表型出现阶段
- Recanalization and infarct evolution depend on clot composition and spontaneous or tPA-induced lysis; endpoints range from hours to days.
- 适用研究问题
- 脑动脉栓塞性缺血、梗死变异及再灌注;溶栓问题限于血凝块变体。
- 模型局限
- 不能把微球栓塞当成血凝块溶栓模型。大鼠研究汇总显示栓塞模型的死亡率与变异受构建方式影响。
实验方法
实验方案
- 脑切片 TTC 染色与梗死面积测定
新鲜脑以2mm冠状切片逐孔经2% TTC(0.1M PBS)37°C避光染色30分钟后固定保存,体视成像并以患侧/对侧半球面积比计算梗死面积百分比。
- 脑切片 TTC 染色与梗死面积测定
新鲜脑以2mm冠状切片逐孔经2% TTC(0.1M PBS)37°C避光染色30分钟后固定保存,体视成像并以患侧/对侧半球面积比计算梗死面积百分比。
配套试剂与材料
- 2% TTC 染液
TTC 工作液(染色)
- 0.1M PBS缓冲液(TTC染色溶剂)
TTC 染色工作液的缓冲体系
- 组织固定液(TTC染色后保存用)
TTC 染色后的组织切片保存
- 组织固定液(TTC染色后保存用)
TTC 染色后的组织切片保存
- 0.1M PBS缓冲液(TTC染色溶剂)
TTC 染色工作液的缓冲体系
- 2% TTC 染液
TTC 工作液(染色)
参考文献
- Ström JO, Ingberg E, Theodorsson A, Theodorsson E. Method parameters' impact on mortality and variability in rat stroke experiments: a meta-analysis.. BMC neuroscience. 2013. PMID:23548160.
- Tuo QZ, Lei P. Ferroptosis in ischemic stroke: Animal models and mechanisms.. Zoological research. 2024. PMID:39397243.
- NCBI Taxonomy official record: Rattus norvegicus (brown rat), Taxonomy ID 10116.
- Animal models of ischemic stroke and their application in clinical research. PMID:26170628.
- Ian Simpson. Induce Stroke via Hypoxia-Ischemia. protocols.io, v2, 2019. DOI: 10.17504/protocols.io.8e5htg6
- Hu Y, Yang Z-H, Yan F, et al. CCA repair or ECA ligation - Which middle cerebral artery occlusion is better in the reperfusion mouse model? Ibrain. 2023;9(3):258-269. DOI:10.1002/ibra.12128; PMID:37786756.
- Bederson JB, Pitts LH, Germano SM, Nishimura MC, Davis RL, Bartkowski HM. Evaluation of 2,3,5-triphenyltetrazolium chloride as a stain for detection and quantification of experimental cerebral infarction in rats. Stroke. 1986;17(6):1304-1308. DOI:10.1161/01.STR.17.6.1304; PMID:2433817. 原文以成年大鼠 MCA 闭塞后 TTC 与 H&E 对比,24 小时 TTC 梗死面积 21±2% 的冠状切片面积,r=0.91,支持 TTC 用于大鼠脑梗死检测与定量。
- Clark WM, Lessov N, Lauten JD, Hazel K. Doxycycline treatment reduces ischemic brain damage in transient middle cerebral artery occlusion in the rat. J Mol Neurosci. 1997;9(2):103-108. DOI:10.1007/BF02736854; PMID:9407391. 原文在成年 Sprague-Dawley 大鼠以线栓行 2 小时可逆 MCAO,48 小时以梗死体积为终点(对照 158±44 mm3),支持 SD 大鼠 MCAO 梗死体积检测背景。
- ARRIVE 2.0 官方规范