下值Kir和Ih电流调节介质前额叶皮层中1层VIP内部神经元的刺激性
Claudio Moreno1, Denise Riquelme1, Camila Cornejo1
1Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile.
介面前额皮质 (mPFC) 中的血管活性肠 (VIP) 内神经元使用超极化激活的 (Ih) 和向内修正的 (Kir) 电流来控制神经元刺激性和信息流动. 这些电流塑造了VIP细胞在mPFC中处理信号的方式.
科学领域:
- 神经科学是一个神经科学.
- 细胞电生理学 细胞电生理学
- 计算神经科学是一种神经科学.
背景情况:
- 皮质层1 (L1) 集成感官信息,并包含表达血管活性肠 (VIP) 的内神经元.
- VIP内部神经元通过消毒金字塔神经元来调节皮质电路,但它们的下值离子机制尚不清楚.
- 了解这些机制对于破译介质前额叶皮层 (mPFC) 中的信息处理至关重要.
研究的目的:
- 为了描述小鼠mPFC中的L1b VIP内部神经元的电生理特性.
- 研究超极化激活的离子电流 (Ih) 和向内调整的电流 (Kir) 在塑造VIP内部神经元刺激性的作用.
- 确定这些电流如何影响mPFC中的突触集成和信息流.
主要方法:
- 在急性小鼠mPFC切片中记录了全细胞补丁.
- 药理上抑制Ih (ZD-7288) 和Kir (BaCl2) 的作用.
- 电压记录和免疫光学用于HCN通道表达.
主要成果:
- L1b VIP 内神经元在静止膜电位附近表现出构成性活跃的 Ih 和 Kir 电流.
- 抑制Ih或Kir个别改变的静止膜电位,输入电阻,作用电位的持续时间和发射频率.
- 这两种电流都提高了EPSP-spike合的概率,而这两种电流都没有影响自发或微型EPSC的特性.
结论:
- 在mPFC中,Ih和Kir电流是L1b VIP内部神经元被动性和内在刺激性的关键调节者.
- 这些电流共同控制EPSP-spike合,影响VIP内部神经元如何整合突触输入.
- 伊和基尔之间的相互作用塑造了前额叶皮层柱内的信号过和信息流.
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