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脑切片 TTC 染色与梗死面积测定

浏览实验方案

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。

适用范围与方法

样本:新鲜小鼠或大鼠脑(取脑后可直接用于 TTC 检测;本方案不含缺血造模步骤)

histopathology assay

试剂与材料

实验流程

  1. 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]]()

质量控制与输出

切片厚度 2 mm;每孔 500 μl 2% TTC(0.1M PBS);锡箔遮光、37°C 摊片机孵育 30 分钟;吸除 TTC 后每孔 500ul 固定液保存;面积测量按患侧/对侧半球分别勾画后计算百分比。

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。

参考文献

  1. Ian Simpson. Induce Stroke via Hypoxia-Ischemia. protocols.io, v2, 2019. DOI: 10.17504/protocols.io.8e5htg6
  2. 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.
  3. 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。
  4. 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。

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