Partial restoration of physiological UP-state activity by GABA pathway modulation in an acute brain slice model of epilepsy

Partial restoration of physiological UP-state activity by GABA pathway modulation in an acute brain slice model of epilepsy
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在癫痫急性脑切片模型中通过 GABA 通路调节部分恢复生理 UP 状态活动

DOI:
10.1016/j.neuropharm.2018.11.032
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发表时间:
2019
期刊:
影响因子:
4.7
通讯作者:
Koerling A
Koerling A
中科院分区:
医学2区
文献类型:
--
作者:
Koerling A

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除了减少癫痫发作外,抗癫痫治疗还应保持生理网络活动。在这里,我们使用了丘脑皮质切片制备显示生理慢振荡,以研究抗惊厥药物对两种药理学癫痫模型的生理活动和癫痫样活动的影响。因此,我们比较了GABA药理学对小鼠桶皮质切片中自发生理和病理事件的影响。我们发现,减少抑制使用GABAAR阻断剂和增强兴奋通过降低Mg 2+浓度允许从生理缓慢振荡癫痫样活动的过渡。我们的研究结果表明,GABABR拮抗剂通过增加低抑制模型中的事件持续时间和高兴奋模型中的事件频率而具有促惊厥特性。此外,我们发现,GABABR激动剂和GABA摄取阻滞剂,已知其抗惊厥特性,主要作用于癫痫样爆发频率,并允许部分恢复的生理事件。作为原理的证明,这些结果表明,具有自发网络事件的切片模型可能是研究抗癫痫药物对癫痫样和生理网络活动的影响的有用管道。
In addition to reducing seizures, anti-epileptic treatments should preserve physiological network activity. Here, we used a thalamocortical slice preparation displaying physiological slow oscillations to investigate the effects of anticonvulsant drugs on physiological activity and epileptiform activity in two pharmacological epilepsy models. Thus, we compared the effects of GABA pharmacology on spontaneous physiological and pathological events in slices of the mouse barrel cortex. We show that both reducing inhibition using GABAAR blockers and enhancing excitation by lowering Mg2+concentration allow for the transition from physiological slow oscillations to epileptiform activity. Our results indicate that GABABR antagonists have pro-convulsive properties by increasing event duration in the low inhibition model and event frequency in the high excitation model. Moreover, we show that GABABR agonists and GABA uptake blockers, known for their anticonvulsant properties, act primarily on epileptiform burst frequency and allow for a partial restoration of physiological events. As a proof of principle, these results indicate that a slice model with spontaneous network events may be a useful pipeline to investigate the effects of anti-epileptic drugs on both epileptiform and physiological network activity.
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