Transient sodium current at subthreshold voltages: activation by EPSP waveforms.
Transient sodium current at subthreshold voltages: activation by EPSP waveforms.
复制标题
亚阈值电压处的瞬态钠电流:EPSP波形激活。
DOI:
10.1016/j.neuron.2012.08.033
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发表时间:
2012-09-20
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:
Carter BC;Giessel AJ;Sabatini BL;Bean BP
Tetrodotoxin (TTX)-sensitive sodium channels carry large transient currents during action potentials and also “persistent” sodium current, a non-inactivating TTX-sensitive current present at subthreshold voltages. We examined gating of subthreshold sodium current in dissociated cerebellar Purkinje neurons and hippocampal CA1 neurons, studied at 37 °C with near-physiological ionic conditions. Unexpectedly, in both cell types small voltage steps at subthreshold voltages activated a substantial component of transient sodium current as well as persistent current. Subthreshold EPSP-like waveforms also activated a large component of transient sodium current, but IPSP-like waveforms engaged primarily persistent sodium current with only a small additional transient component. Activation of transient as well as persistent sodium current at subthreshold voltages produces amplification of EPSPs that is sensitive to the rate of depolarization and can help account for the dependence of spike threshold on depolarization rate, as previously observed in vivo.
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DOI:
10.1523/jneurosci.0376-10.2010
发表时间:
2010-04-21
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Aman TK;Raman IM
通讯作者:
Raman IM
影响因子:
2.5
作者:
Del Negro, CA;Koshiya, N;Smith, JC
通讯作者:
Smith, JC
影响因子:
16.2
作者:
Do, MTH;Bean, BP
通讯作者:
Bean, BP
影响因子:
16.2
作者:
Carter, Brett C.;Bean, Bruce P.
通讯作者:
Bean, Bruce P.
影响因子:
5.5
作者:
Andreasen, M;Lambert, JDC
通讯作者:
Lambert, JDC