Regulation of synaptic transmission by presynaptic CaMKII and BK channels.

Regulation of synaptic transmission by presynaptic CaMKII and BK channels.
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DOI:
10.1007/s12035-008-8039-7
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发表时间:
2008-10
影响因子:
5.1
通讯作者:
Wang ZW
Wang ZW
中科院分区:
医学2区
文献类型:
--
作者:
Wang ZW

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Ca2+/钙调蛋白依赖性蛋白激酶 II (CaMKII) 和 BK 通道在突触前神经末梢富集,其中 CaMKII 与突触小泡相关,而 BK 通道与质膜中的电压敏感 Ca2+ 通道 (VSCC) 共定位。越来越多的证据表明,这两种蛋白质在控制神经递质释放方面发挥着重要作用。突触前 BK 通道主要充当神经递质释放的负调节因子。相反,突触前 CaMKII 会增强或抑制神经递质释放和突触可塑性,具体取决于实验/生理条件和特定突触的特性。突触前 CaMKII 的不同功能似乎是由不同的下游蛋白(包括 BK 通道)介导的。
Ca2+/calmodulin-dependent protein kinase II (CaMKII) and the BK channel are enriched at the presynaptic nerve terminal, where CaMKII associates with synaptic vesicles whereas the BK channel colocalizes with voltage-sensitive Ca2+ channels (VSCCs) in the plasma membrane. Mounting evidence suggests that these two proteins play important roles in controlling neurotransmitter release. Presynaptic BK channels primarily serve as a negative regulator of neurotransmitter release. In contrast, presynaptic CaMKII either enhances or inhibits neurotransmitter release and synaptic plasticity depending on experimental/physiological conditions and properties of specific synapses. The different functions of presynaptic CaMKII appear to be mediated by distinct downstream proteins, including the BK channel.
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