Differential Control of Axonal and Somatic Resting Potential by Voltage-Dependent Conductances in Cortical Layer 5 Pyramidal Neurons.
Differential Control of Axonal and Somatic Resting Potential by Voltage-Dependent Conductances in Cortical Layer 5 Pyramidal Neurons.
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DOI:
10.1016/j.neuron.2018.02.016
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发表时间:
2018-03-21
期刊:
影响因子:
16.2
通讯作者:
Bean BP
中科院分区:
文献类型:
--
作者:
Hu W;Bean BP
Voltage-dependent conductances not only drive action potentials but also help regulate neuronal resting potential. We found differential regulation of resting potential in the proximal axon of layer 5 pyramidal neurons compared to the soma. Axonal resting potential was more negative than the soma, reflecting differential control by multiple voltage-dependent channels, including sodium channels, Cav3 channels, Kv7 channels, and HCN channels. Kv7 current is highly localized to the axon and HCN current to the soma and dendrite. Because of impedance asymmetry between the soma and axon, axonal Kv7 current has little effect on somatic resting potential, while somatodendritic HCN current strongly influences the proximal axon. In fact, depolarizing somatodendritic HCN current is critical for resting activation of all the other voltage-dependent conductances, including Kv7 in the axon. These experiments reveal complex interactions among voltage-dependent conductances to control region-specific resting potential, with somatodendritic HCN channels playing a critical enabling role. Hu and Bean show that the axon of pyramidal neurons has a negative resting potential relative to the soma. The difference arises from axonally-localized Kv7 channels, and depolarizing somatic HCN current is necessary for resting activation of axonal Kv7 channels.
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影响因子:
16.2
作者:
Carter BC;Giessel AJ;Sabatini BL;Bean BP
通讯作者:
Bean BP
影响因子:
7.4
作者:
Du X;Hao H;Gigout S;Huang D;Yang Y;Li L;Wang C;Sundt D;Jaffe DB;Zhang H;Gamper N
通讯作者:
Gamper N
DOI:
10.1523/jneurosci.4064-11.2011
发表时间:
2011-11-09
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Grubb MS;Shu Y;Kuba H;Rasband MN;Wimmer VC;Bender KJ
通讯作者:
Bender KJ
影响因子:
5.3
作者:
Eyal, Guy;Mansvelder, Huibert D.;Segev, Idan
通讯作者:
Segev, Idan
影响因子:
2.5
作者:
Berger, T;Larkum, ME;Lüscher, HR
通讯作者:
Lüscher, HR