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首页> 外文期刊>Trends in Neurosciences >GABAA, NMDA and AMPA receptors: a developmentally regulated 'menage a trois'.
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GABAA, NMDA and AMPA receptors: a developmentally regulated 'menage a trois'.

机译:GABAA,NMDA和AMPA受体:一种发育受调节的“三叉戟管理”。

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摘要

The main ionotropic receptors (GABAA, NMDA and AMPA) display a sequential participation in neuronal excitation in the neonatal hippocampus. GABA, the principal inhibitory transmitter in the adult CNS, acts as an excitatory transmitter in early postnatal stage. Glutamatergic synaptic transmission is first purely NMDA-receptor based and lacks functional AMPA receptors. Therefore, initially glutamatergic synapses are 'silent' at resting membrane potential, NMDA channels being blocked by Mg2+. However, when GABA and glutamatergic synapses are coactivated during the physiological patterns of activity, GABAA receptors can facilitate the activation of NMDA receptors, playing the role conferred to AMPA receptors later on in development. Determining the mechanisms underlying the development of this 'menage a trois' will shed light not only on the wide range of trophic roles of glutamate and GABA in the developing brain, but also on the significance of the transition from neonatal to adult forms of plasticity.
机译:主要的离子受体(GABAA,NMDA和AMPA)在新生儿海马体中依次参与神经元兴奋。 GABA是成人中枢神经系统的主要抑制性递质,在产后早期可作为兴奋性递质。谷氨酸能的突触传递首先是纯粹基于NMDA受体的,并且缺乏功能性AMPA受体。因此,最初的谷氨酸能突触在静息膜电位处“沉默”,NMDA通道被Mg2 +阻断。但是,当在生理活动模式中将GABA和谷氨酸能突触共激活时,GABAA受体可以促进NMDA受体的激活,在以后的发展中起AMPA受体的作用。确定这种“三叉戟”发展机制的基础,不仅将阐明正在发展的大脑中谷氨酸和GABA的多种营养作用,而且还将阐明从新生儿到成人可塑性转变的重要性。

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