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Introducing a mouse model of brain death.

机译:介绍小鼠脑死亡模型。

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Experimental animal models of brain death increasing intracranial pressure (ICP) by inflating an intracranial placed balloon-catheter are well established and used in transplant-associated studies. Our aim was to develop an experimental mouse model of brain death (BD) and to compare explosive and gradual brain death induction under ICP monitoring. We therefore induced BD in female OF-1 mice by injecting 40 microl saline every 5 min into an intracranial placed balloon increasing ICP rapidly [BD ex, n=7], or gradually [BD grad, n=7] with 20 microl volume every 5 min under electroencephalogram (EEG) and ICP monitoring until BD occurred. The major criterion for BD was a flat-line-EEG, confirmed by cessation of spontaneous respiration and maximally dilated and fixed pupils. ICP, central activity and heart rate were continuously monitored during the entire 6h follow-up. In sham-operated controls [control, n=7] a burr hole was drilled but no balloon inserted. The BD groups showed equal ICP levels at the time of BD. Both groups had increased heart rates (HR) 15 min after BD, HR decreased to 402+/-29.39 bpm (beats per minute) [BD ex] and 409.33+/-26.46 bpm [BD grad] (n.s. vs. control) by 30 min after the inflation of the balloon, but only BD ex showed a significant decrease in HR compared to control, progressively decreasing thereafter. On the basis of these results, we conclude that the mouse model of brain death can be performed in a standardized, reproducible and successful way.
机译:通过充气放置颅内放置的球囊导管来增加颅内压(ICP)的脑死亡的实验动物模型已得到很好的建立,并用于移植相关的研究中。我们的目标是建立实验性脑死亡(BD)小鼠模型,并在ICP监测下比较爆炸性和渐进性脑死亡诱发。因此,我们通过每5分钟向颅内放置的气囊中注射40微升盐水,以迅速增加ICP的速度[BD ex,n = 7]或逐渐[BD grad,n = 7],每20微升的体积,向雌性OF-1小鼠中诱发BD在脑电图(EEG)和ICP监测下5分钟,直到发生BD。 BD的主要标准是脑电图平坦,可通过停止自发呼吸以及最大散瞳和固定瞳孔来确认。在整个6小时的随访期间,持续监测ICP,中枢活动和心率。在假手术的对照组[对照组,n = 7]中钻了一个毛刺孔,但没有插入气球。 BD组在BD时显示出相同的ICP水平。两组在BD后15分钟心率(HR)均升高,HR降低至402 +/- 29.39 bpm(每分钟心跳数)[BD ex]和409.33 +/- 26.46 bpm [BD grad](ns vs.对照)球囊充气后30分钟,但与对照相比,只有BD ex表现出HR显着降低,此后逐渐降低。根据这些结果,我们得出结论,可以以标准化,可重现和成功的方式执行小鼠脑死亡模型。

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