Kv3.3 subunits control presynaptic action potential waveform and neurotransmitter release at a central excitatory synapse
Kv3.3 subunits control presynaptic action potential waveform and neurotransmitter release at a central excitatory synapse
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Kv3.3 亚基控制中枢兴奋性突触的突触前动作电位波形和神经递质释放
DOI:
10.1101/2021.11.02.466934
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Richardson A
中科院分区:
文献类型:
--
作者:
Richardson A
Kv3 potassium currents mediate rapid repolarisation of action potentials (APs), supporting fast spikes and high repetition rates. Of the four Kv3 gene family members, Kv3. 1 and Kv3. 3 are highly expressed in the auditory brainstem and we exploited this to test for subunit-specific roles at the calyx of Held presynaptic terminal in the mouse. Deletion of Kv3. 3 (but not Kv3. 1) reduced presynaptic Kv3 channel immunolabelling, increased presynaptic AP duration and facilitated excitatory transmitter release; which in turn enhanced short-term depression during high-frequency transmission. The response to sound was delayed in the Kv3. 3KO, with higher spontaneous and lower evoked firing, thereby reducing signal-to-noise ratio. Computational modelling showed that the enhanced EPSC and short-term depression in the Kv3. 3KO reflected increased vesicle release probability and accelerated activity-dependent vesicle replenishment. We conclude that Kv3. 3 mediates fast repolarisation for short precise APs, conserving transmission during sustained high-frequency activity at this glutamatergic excitatory synapse.
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影响因子:
3.4
作者:
Neher E
通讯作者:
Neher E
DOI:
--
发表时间:
2011
期刊:
Journal of Physiology
影响因子:
--
作者:
Yi;J. Aitoubah;Amanda M. Lauer;M. Nuriya;K. Takamiya;Zhengping Jia;B. May;R. Huganir;Lu
通讯作者:
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DOI:
10.1523/jneurosci.3728-16.2017
发表时间:
2017-08-23
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Sinclair JL;Fischl MJ;Alexandrova O;Heβ M;Grothe B;Leibold C;Kopp-Scheinpflug C
通讯作者:
Kopp-Scheinpflug C
影响因子:
3.4
作者:
L. Tu;Carol Deutsch
通讯作者:
L. Tu;Carol Deutsch
DOI:
10.1523/jneurosci.23-12-04868.2003
发表时间:
2003-06
期刊:
The Journal of Neuroscience
影响因子:
--
作者:
Adrian Y. C. Wong;B. Graham;B. Billups;I. Forsythe
通讯作者:
Adrian Y. C. Wong;B. Graham;B. Billups;I. Forsythe