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Neuroscience
创伤性脑损伤诱导受控皮质冲击的母模型
创伤性脑损伤诱导受控皮质冲击的母模型
JoVE Journal
Neuroscience
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JoVE Journal Neuroscience
Murine Model of Controlled Cortical Impact for the Induction of Traumatic Brain Injury

创伤性脑损伤诱导受控皮质冲击的母模型

Full Text
10,834 Views
05:01 min
August 16, 2019

DOI: 10.3791/60027-v

Steven J Schwulst1, Mecca B.A.R. Islam1

1Department of Surgery,Northwestern University

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Please note that some of the translations on this page are AI generated. Click here for the English version.

Summary

在这里,我们描述了通过开头控制皮质撞击诱导鼠外创伤性脑损伤的协议。

Transcript

受控皮质撞击易于跨受试者和实验标准化,并允许将整个创伤性脑损伤谱应用到精确定义的大脑中的区域。证明这个程序是麦加伊斯兰,在我的实验室的研究技术人员。这种技术仍然是诱导啮齿动物创伤性脑损伤的最一致和可重复的形式。

在开始该过程之前,将冲击装置连接到立体轴操作框架。将驱动装置与所需的生物力学参数隔离,以达到适当的实验速度和井速。戴上新的个人防护设备和无菌手套,并确认麻醉实验鼠对手趾捏缺乏反应。

使用剪子为手术现场剃皮毛,并在动物的眼睛上涂抹软膏。然后将鼠标放入手术室,然后用三个连续的碘和酒精手术磨砂来准备剃光的皮肤。要诱发受控的皮质创伤性脑损伤,首先使用手术刀沿着头皮中线做一厘米的切口,以暴露头骨。

从手术地点收回头皮,识别裸露头骨上的下垂和冠状缝合。要进行颅骨切除术,请配备一个5毫米的颤音钻头,以以最大速度激活钻头,并应用垂直于头骨的钻头,在下垂缝合线左侧两毫米,将两毫米的旋转到日冕缝合线,承受均匀的温和压力。当钻头穿透头骨时,会感觉到轻微的给予。

使用钳子和小量表皮下针去除骨瓣,完全暴露底层杜拉母体,并旋转冲击器尖端到操作场。将立体框架的微型耳杆之间的双边时间骨骼固定起来,将切口锁定在切口夹内,以在鼠标头上形成稳定的三点固定。降低尖端,直到它与暴露的杜拉母体接触。

仪器的接触传感器将发出声音提示,以提醒已进行接触。从零点收回冲击尖端,降低立体轴框架上的撞击器位置,以设置所需的冲击深度。然后将冲击器激活激活装置,然后将设备旋转回场外,以便将动物从框架中移走。

受伤后,立即将无菌棉尖施用器直接压到头骨和受伤的皮质表面,以控制任何出血,并使用新的施用器干燥头骨。根据标准技术关闭颅骨切除术的头皮,并管理术后镇痛。然后将动物放在横向脱热恢复位置,在干净的预热笼中进行监测,直到完全下位,并在实验过程中每三天测量一次体重。

所证明的伤害的传递导致宫内膜下体和亚布拉奇内出血。对严重伤害后创伤性脑损伤脑组织部分的组织学评估揭示了严重的气向性皮质和海马损失以及反向水肿和扭曲。严重损伤大脑的 MR 成像也显示渐进性组织损失和脑脊髓液的替换。

受控皮质撞击可诱发可靠且一致的损伤,能够产生广泛的临床适用脑损伤。我们受控的皮质撞击方法生成严重创伤性脑损伤的murine模型,用于行为和成像分析,并生成用于分子和细胞分析的组织。

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神经科学 问题 150 创伤性脑损伤 颅骨切除术 杜拉母体 受控皮质冲击 内层出血 下膜出血 下膜出血 下膜出血 硬膜下出血 立体性

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