GAP43位于皮质底终端,抑制小鼠新奇性诱导的过度活动
Irene B Maroto1,2,3, Carlos Costas-Insua1,2,3, Carlos Montero-Fernández1,2,3
1Department of Biochemistry and Molecular Biology, Schools of Biology and Chemistry, Instituto Universitario de Investigación Neuroquímica (IUIN), Complutense University, Madrid ES-28040, Spain.
概括
激发性神经元中的生长相关蛋白43 (GAP43) 通过调节皮质前皮质电路来驱动新奇性诱导的过度活动. 这项研究揭示了GAP43的存在.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 行为遗传学 行为遗传学
背景情况:
- 与生长相关的蛋白质43 (GAP43) 对神经可塑性在前突触终端至关重要.
- GAP43功能障碍与精神疾病和记忆力缺陷有关.
- 它在平衡海马体以外的大脑区域激发/抑制中的作用基本上是未知的.
研究的目的:
- 为了研究GAP43在telencephalicGlutamatergic和前脑GABAergic神经元中的作用.
- 阐明GAP43在调节刺激-抑制平衡和行为的作用.
- 建立一种新的小鼠模型,用于研究精神疾病中的多动性.
主要方法:
- 产生的条件淘汰小鼠:Glu-GAP43-/- (远脑谷氨基神经元) 和GABA-GAP43-/- (前脑GABAergic神经元).
- 评估行为表现型,重点关注新性诱导的多动性.
- 利用化学遗传学与DREADDs来抑制皮质干的途径.
主要成果:
- Glu-GAP43-/-小鼠表现出显著的新奇性诱导过度活动;GABA-GAP43-/-小鼠没有.
- 在Glu-GAP43-/-小鼠中,高活性与背上状体激活和增强的皮质状体谷氨基基传递相关.
- 在Glu-GAP43-/-小鼠中,皮质底突触的内大麻素介导的长期抑郁被废除了.
- 在Glu-GAP43-/-小鼠中,皮质干关节的化学遗传抑制使过活性正常化.
结论:
- GAP43在皮质状回路中发挥着关键的调节作用.
- 选择性删除GAP43在谷氨基质神经元中破坏了刺激性传播,并导致过度活跃.
- 这些发现突显了GAP43在新奇处理中的参与,并为特征为多动性的精神疾病提供了一个模型.
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