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JoVE Journal
Cancer Research
疲劳的小鼠模型的外围照射引起
疲劳的小鼠模型的外围照射引起
JoVE Journal
Cancer Research
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JoVE Journal Cancer Research
A Mouse Model of Fatigue Induced by Peripheral Irradiation

疲劳的小鼠模型的外围照射引起

Full Text
8,138 Views
04:15 min
March 17, 2017

DOI: 10.3791/55145-v

Brian S. Wolff1, Michael A. Renner1, Danielle A. Springer2, Leorey N. Saligan1

1Symptom Biology Unit, National Institute of Nursing Research,National Institutes of Health, 2Murine Phenotyping Core, National Heart, Lung, and Blood Institute,National Institutes of Health

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

我们描述了使用靶向外围照射到在小鼠中诱导的疲劳样行为的方法。选定的非致命辐射剂量导致自愿轮运行活动为期一周的减少。

该程序的总体目标是测量外周照射诱导的疲劳样行为。这种方法可以帮助回答有关疲劳的关键问题,尤其是与照射相关的疲劳。例如,它可用于探索免疫系统和中枢神经系统在照射后疲劳中的不同作用。

这种技术的主要优点是它专门使用外围照射来影响本质上驱动的疲劳行为。首先将小鼠随机分为假辐照对照组或辐照组。然后,通过尾巴纹身识别 5 周龄的雄性小鼠,并将每只小鼠分配到一个单独的标准通风小鼠笼中。

让小鼠至少再适应笼子三天,每天轻柔地处理每只小鼠三分钟。接下来,向小鼠介绍单独的自愿轮式跑步活动 (VWRA) 笼子,每个笼子都配备了一个连接到电子计数器的跑轮,用于连续记录。通过计算机软件界面开始记录 VWRA。

将录制间隔设置为 1 小时,将持续时间设置为至少 5 天。最后,五天后,通过软件界面停止 VWRA 记录,并将小鼠放回没有运行轮的标准笼子。麻醉小鼠后,确认麻醉对脚趾捏有效。

在眼睛上使用软膏以防止干燥。接下来,将麻醉的鼠标转移到铅屏蔽装置中。将鼠标布置在屏蔽层中,以便仅暴露下腹部和骨盆区域。

然后,使用医用胶带将鼠标尾巴的底部固定在屏蔽层内的位置,以确保位置在照射过程中不会改变。如果小鼠在照射组中,则以每分钟约 110 厘戈瑞的剂量率输送 800 厘格雷。如果鼠标在假辐照对照组中,请将鼠标置于非活动辐照器中相同的时间。

照射完成后,将鼠标从辐照器和防护罩中取出,并将其放回原来的标准笼中。持续监测小鼠,直到它恢复足够的意识以维持胸骨卧位。连续照射三天后,将小鼠转移到各自的 VWRA 笼中。

最后,为了捕获辐射引起的疲劳,记录 VWRA 15 天。辐射后前 7 天效果显著,平均 VWRA 距离最低出现在辐射后第 3 天。这里显示了 VWRA 从照射前到照射后的变化分布。

虽然大多数受测小鼠表现出疲劳样症状,但有少数小鼠的 VWRA 几乎没有变化甚至增加。在尝试此程序时,重要的是要确保小鼠在照射期间完全麻醉,因为任何运动都可能影响照射目标和剂量。看完这个视频,你应该对如何使用周边靶向照射来诱导小鼠的疲劳样行为有一个很好的了解。

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