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首页> 外文期刊>Neuron >Long-term plasticity mediated by mGluR1 at a retinal reciprocal synapse.
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Long-term plasticity mediated by mGluR1 at a retinal reciprocal synapse.

机译:mGluR1在视网膜相互突触中介导的长期可塑性。

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摘要

The flow of information across the retina is controlled by reciprocal synapses between bipolar cell terminals and amacrine cells. However, the synaptic delays and properties of plasticity at these synapses are not known. Here we report that glutamate release from goldfish Mb-type bipolar cell terminals can trigger fast (delay of 2-3 ms) and transient GABA(A) IPSCs and a much slower and more sustained GABA(C) feedback. Synaptically released glutamate activated mGluR1 receptors on amacrine cells and, depending on the strength of presynaptic activity, potentiated subsequent feedback. This poststimulus enhancement of GABAergic feedback lasted for up to 10 min. This form of mGluR1-mediated long-term synaptic plasticity may provide retinal reciprocal synapses with adaptive capabilities.
机译:跨视网膜的信息流由双极细胞末端和无长突细胞之间的相互突触控制。但是,这些突触的突触延迟和可塑性的性质是未知的。在这里,我们报告从金鱼Mb型双极细胞末端释放谷氨酸可以触发快速(延迟2-3 ms)和瞬时GABA(A)IPSC,以及更慢和更持久的GABA(C)反馈。突触释放的谷氨酸激活无长突霉素细胞上的mGluR1受体,并且取决于突触前活性的强度,增强了随后的反馈。这种刺激后的GABA能反馈持续时间长达10分钟。这种形式的mGluR1介导的长期突触可塑性可能为视网膜相互突触提供适应能力。

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