Ca(2+) signaling evoked by activation of Na(+) channels and Na(+)/Ca(2+) exchangers is required for GABA-induced NG2 cell migration.
Ca(2+) signaling evoked by activation of Na(+) channels and Na(+)/Ca(2+) exchangers is required for GABA-induced NG2 cell migration.
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GABA 诱导的 NG2 细胞迁移需要 Na 通道和 Na /Ca2 交换器激活引起的 Ca2 信号传导
DOI:
10.1083/jcb.200811071
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发表时间:
2009-07-13
期刊:
影响因子:
--
通讯作者:
Duan S
中科院分区:
文献类型:
--
作者:
Tong XP;Li XY;Zhou B;Shen W;Zhang ZJ;Xu TL;Duan S
NG2 cells originate from various brain regions and migrate to their destinations during early development. These cells express voltage-gated Na+ channels but fail to produce typical action potentials. The physiological role of Na+ channels in these cells is unclear. We found that GABA induces membrane depolarization and Ca2+ elevation in NG2 cells, a process requiring activation of GABAA receptors, Na+ channels, and Na+/Ca2+ exchangers (NCXs), but not Ca2+ channels. We have identified a persistent Na+ current in these cells that may underlie the GABA-induced pathway of prolonged Na+ elevation, which in turn triggers Ca2+ influx via NCXs. This unique Ca2+ signaling pathway is further shown to be involved in the migration of NG2 cells. Thus, GABAergic signaling mediated by sequential activation of GABAA receptors, noninactivating Na+ channels, and NCXs may play an important role in the development and function of NG2 glial cells in the brain.
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1023/a:1025751900356
发表时间:
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期刊:
JOURNAL OF NEUROCYTOLOGY
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