摩托神经元的抑制突触对神经元活动具有恒常性反应,并调节肌缩侧面硬化病原发生
Kareen Halablab1,2, Gizem Yartas1, Natalie Dikwella2
1German Center for Neurodegenerative Diseases (DZNE), 89081 Ulm, DE.
概括
运动神经元 (MN) 中的抑制性突触适应了早期ALS期间MN活动的变化. 抑制这些抑制性连接增加了MN刺激性,并减少了疾病标志物,表明了治疗潜力.
科学领域:
- 神经科学是一个神经科学.
- 神经退行性疾病 神经退行性疾病
- 突触性可塑性 突触性可塑性
背景情况:
- 肌缩侧面硬化 (ALS) 中的运动神经元 (MN) 脆弱性可能涉及激发/抑制 (E/I) 平衡的改变.
- 在早期ALS发病过程中,抑制性突触的适应性变化的作用尚不清楚.
研究的目的:
- 在早期的ALS中调查抑制性突触对MN的动态变化.
- 探索抑制性突触对MN活动调节的恒常反应.
- 评估调节抑制性突触元件对ALS疾病标志物的影响.
主要方法:
- 来自SOD1G93A小鼠的MN的共聚焦显微镜.
- 化学遗传工具 (PSAM,DREADD) 来改变MN的兴奋能力.
- 一个E3酶结合体内 (GFE3) 降解Gephyrin和减少抑制性受体集群.
主要成果:
- 在MN的抑制突触中观察到GlyR的下调和GABAR集群的上调.
- 抑制性突触显示出平静反应,增加了MN活动加剧的集群.
- GFE3治疗减少了抑制集群,增加了净MN活性,并减少了疾病标志物.
- 综合活动增加和抑制降低并没有对疾病标志物产生净有益影响.
结论:
- 抑制性突触在早期的ALS病变发生过程中具有动态作用,并表现出平稳调节.
- 抑制抑制性突触增加了净MN活动,可能会影响疾病途径.
- 调节抑制性突触元件为ALS提供了潜在的治疗途径.
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