Potassium channel modulation and auditory processing.

Potassium channel modulation and auditory processing.
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DOI:
10.1016/j.heares.2011.03.004
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发表时间:
2011-09
期刊:
影响因子:
2.8
通讯作者:
Kaczmarek, Leonard K.
Kaczmarek, Leonard K.
中科院分区:
医学1区
文献类型:
--
作者:
Brown, Maile R.;Kaczmarek, Leonard K.

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为了准确地处理听觉信息,听觉脑干核团中的神经元必须以高速率和高时间准确性放电。只有当这些神经元的内在电特性与传入突触刺激的模式相匹配时,这两个要求才能得到满足。这篇综述文章重点介绍了三个钾通道家族,它们对塑造神经元的放电模式和准确性至关重要。听觉环境的改变可以触发听觉脑干核团钾通道磷酸化状态的快速变化。听觉环境中持续时间较长的变化会导致编码这些通道的基因的翻译和转录速率发生变化。在设置听觉系统对声音刺激的整体敏感性中起作用的关键蛋白质是FMRP(脆性X智力迟钝蛋白),其直接结合通道并且还调节通道的mRNA的翻译。
For accurate processing of auditory information, neurons in auditory brainstem nuclei have to fire at high rates with high temporal accuracy. These two requirements can only be fulfilled when the intrinsic electrical properties of these neurons are matched to the pattern of incoming synaptic stimulation. This review article focuses on three families of potassium channels that are critical to shaping the firing pattern and accuracy of neurons. Changes in the auditory environment can trigger very rapid changes in the phosphorylation state of potassium channels in auditory brainstem nuclei. Longer lasting changes in the auditory environment produce changes in the rates of translation and transcription of genes encoding these channels. A key protein that plays a role in setting the overall sensitivity of the auditory system to sound stimuli is FMRP (Fragile X Mental Retardation Protein), which binds channels directly and also regulates the translation of mRNAs for the channels.
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