Presynaptic voltage-gated calcium channels in the auditory brainstem.

Presynaptic voltage-gated calcium channels in the auditory brainstem.
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DOI:
10.1016/j.mcn.2021.103609
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发表时间:
2021-04
期刊:
Molecular and cellular neurosciences
影响因子:
--
通讯作者:
Veeraraghavan P
Veeraraghavan P
中科院分区:
其他
文献类型:
--
作者:
Young SM Jr;Veeraraghavan P

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听觉脑干中的初始突触内的声音信息编码需要响应于动作电位(AP)放电率的快速和大的波动的可靠和精确的突触传递。突触前末梢电压门控性钙通道(CaV)的钙离子进入的幅度和位置是触发AP介导的释放的关键决定因素。在哺乳动物中枢神经系统(CNS)中,CaV2.1亚型是CNS功能的关键亚型,因为它是触发AP介导的突触囊泡(SV)释放的最有效的CaV2亚型。听觉脑干突触利用CaV2.1来维持快速和重复的SV释放以编码声音信息。因此,理解控制CaV2.1定位、组织和生物物理特性的突触前机制对于理解听觉处理是不可或缺的。在这里,我们回顾我们目前的知识,突触前CaV2丰度和组织的听觉脑干和听觉处理的调节的影响控制。
Sound information encoding within the initial synapses in the auditory brainstem requires reliable and precise synaptic transmission in response to rapid and large fluctuations in action potential (AP) firing rates. The magnitude and location of Ca2+ entry through voltage-gated Ca2+ channels (CaV) in the presynaptic terminal are key determinants in triggering AP-mediated release. In the mammalian central nervous system (CNS), the CaV2.1 subtype is the critical subtype for CNS function, since it is the most efficient CaV2 subtype in triggering AP-mediated synaptic vesicle (SV) release. Auditory brainstem synapses utilize CaV2.1 to sustain fast and repetitive SV release to encode sound information. Therefore, understanding the presynaptic mechanisms that control CaV2.1 localization, organization and biophysical properties are integral to understanding auditory processing. Here, we review our current knowledge about the control of presynaptic CaV2 abundance and organization in the auditory brainstem and impact on the regulation of auditory processing.
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