Neuroscience
A subscription to JoVE is required to view this content.
You will only be able to see the first 2 minutes.
The JoVE video player is compatible with HTML5 and Adobe Flash. Older browsers that do not support HTML5 and the H.264 video codec will still use a Flash-based video player. We recommend downloading the newest version of Flash here, but we support all versions 10 and above.
If that doesn't help, please let us know.
Chapters
Summary May 6th, 2021
Please note that all translations are automatically generated.
Click here for the English version.
这里描述的是光血栓中风模型,其中中风通过完整的头骨产生,在施用光敏染料后,使用激光照明诱导永久微血管闭塞。
Transcript
光血栓中风模型方法可能适合细胞和分子研究皮质可塑性,因为边界有限,在皮层的不同区域诱导损伤的灵活性有限。光血栓形成模型与其他中风模型有三大优势,即将病变引向所需区域的可能性、高可重复性和低死亡率。适当的玫瑰孟加拉剂量是关键的成功和模型的稳定性。
结果取决于技术规范,如激光功率、交叉应用正时和未受影响皮层的光学先令。首先溶解玫瑰孟加拉在0.9%盐溶液的最终浓度为每毫升10毫克。使用热铅消毒器对所有仪器进行细致消毒,并在手术前后使用微生物消毒喷雾对所有表面进行消毒。
准备一个装满盐水溶液的注射器,以保持操作区域水分和准备麻醉气体。测量小鼠的体重,以调整要注射的玫瑰孟加拉的剂量。设置相关反馈控制加热垫,以保持鼠标体温。
一旦小鼠完全麻醉并固定在立体定向框架中,轻轻插入直肠探头,在整个外科手术过程中监测小鼠的体温。将 Dex 泛酚眼药膏涂抹在眼睛上,用消毒剂清洁皮肤和周围毛皮。用剪刀做一个两到两厘米半厘米的纵向切口,并缩回暴露头骨。
使用棉花轻轻取出腹膜并定位冠状缝合线。打开 561 纳米激光时戴上防护眼镜,在左侧标记加号 3 毫米,然后关闭激光,在标记的坐标上挂上直径为 4 毫米的孔的贴纸。将鼠标内注射玫瑰孟加拉。
将激光束置于距离头骨四到五厘米的地方。打开激光并照亮头骨 20 分钟。通过涂抹两滴0.9%的盐水来补充头骨水分。
在缝注伤口后,将鼠标置于37摄氏度的恢复室中,以便从麻醉中恢复过来。一小时后,将鼠标放回笼子里,放在温度控制室。连续冠心病脑部段的晶体紫罗兰色在中风诱导24小时后用于梗塞体积进入分析。
这种中风模型的变异性较低,平均梗塞量为29.3立方毫米,占一个脑半球的23%。光粒体病变导致复合神经评分所示的中度和长期感觉运动损伤。手术后24小时,中风动物的神经评分发生了显著变化。
尽管差异仍然存在,但中风小鼠会随着时间而改善。在受玫瑰孟加拉加照明的老鼠中,手术后24小时体重和体温下降。然而,在手术后的三天内,观察到了恢复情况。
利用激光成像证实了缺血变化。结果表明,仅由玫瑰孟加拉或激光照明不会产生病变,而两者同时应用则产生一个圆形低沉灌水区,周围环绕着狭窄的寡头区域。手术后24小时评估梗塞体积的水晶紫罗兰色和隧道染色表明,玫瑰孟加拉或激光照明手术均未造成组织损伤。
另一方面,玫瑰孟加拉加激光照明产生了一个划好分界病变。重要的是要测量动物的体重来调整玫瑰孟加拉注射。验尸官切换器的正确状态对于诱导动物之间一致的病变非常重要。
由于此协议使头骨完好无损,甚至可以通过颅窗执行,因此可以与宽场或多光子在体内成像相结合。
Related Videos
You might already have access to this content!
Please enter your Institution or Company email below to check.
has access to
Please create a free JoVE account to get access
Login to access JoVE
Please login to your JoVE account to get access
We use/store this info to ensure you have proper access and that your account is secure. We may use this info to send you notifications about your account, your institutional access, and/or other related products. To learn more about our GDPR policies click here.
If you want more info regarding data storage, please contact gdpr@jove.com.
Please enter your email address so we may send you a link to reset your password.
We use/store this info to ensure you have proper access and that your account is secure. We may use this info to send you notifications about your account, your institutional access, and/or other related products. To learn more about our GDPR policies click here.
If you want more info regarding data storage, please contact gdpr@jove.com.
Your JoVE Unlimited Free Trial
Fill the form to request your free trial.
We use/store this info to ensure you have proper access and that your account is secure. We may use this info to send you notifications about your account, your institutional access, and/or other related products. To learn more about our GDPR policies click here.
If you want more info regarding data storage, please contact gdpr@jove.com.
Thank You!
A JoVE representative will be in touch with you shortly.
Thank You!
You have already requested a trial and a JoVE representative will be in touch with you shortly. If you need immediate assistance, please email us at subscriptions@jove.com.
Thank You!
Please enjoy a free 2-hour trial. In order to begin, please login.
Thank You!
You have unlocked a 2-hour free trial now. All JoVE videos and articles can be accessed for free.
To get started, a verification email has been sent to email@institution.com. Please follow the link in the email to activate your free trial account. If you do not see the message in your inbox, please check your "Spam" folder.