Selective plasticity of fast and slow excitatory synapses on somatostatin interneurons in adult visual cortex.

Selective plasticity of fast and slow excitatory synapses on somatostatin interneurons in adult visual cortex.
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DOI:
10.1038/s41467-023-42968-y
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发表时间:
2023-11-07
影响因子:
16.6
通讯作者:
Lee, Hey-Kyoung
Lee, Hey-Kyoung
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Grier, Bryce D.;Parkins, Samuel;Omar, Jarra;Lee, Hey-Kyoung

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生长抑素阳性(SOM)中间神经元是塑造皮质处理过程中不可或缺的一部分,它们的动态募集可能是适应感官体验和情境信息所必需的。我们发现,根据 AMPA 受体介导的电流动力学,小鼠初级视觉皮层 (V1) 2/3 层 (L2/3) 的 SOM 上的兴奋性突触可分为快 (F) 型和慢 (S) 型。每个 SOM 都包含不同比例的两种类型的突触。大多数局部锥体神经元 (PC) 使用两种类型与 SOM 建立单一连接,其次是仅使用 S 型的神经元,少数仅使用 F 型的神经元。感觉体验对 SOM 上的突触进行差异性调节,例如局部 F 型突触会随着视觉剥夺而变化,S 型突触会随着跨模态听觉剥夺而发生可塑性。我们的结果表明,两种类型的兴奋性突触增加了 SOM 回路募集的丰富性,并经历选择性可塑性,从而实现成人 V1 的动态适应。皮质中生长抑素感觉神经元的兴奋性突触尚未完全表征。在这里,作者报告说,视觉皮层生长抑素神经元通过利用两种不同类型的兴奋性突触受到感觉体验的调节。
Somatostatin-positive (SOM) interneurons are integral for shaping cortical processing and their dynamic recruitment is likely necessary for adaptation to sensory experience and contextual information. We found that excitatory synapses on SOMs in layer 2/3 (L2/3) of primary visual cortex (V1) of mice can be categorized into fast (F)- and slow (S)-Types based on the kinetics of the AMPA receptor-mediated current. Each SOM contains both types of synapses in varying proportions. The majority of local pyramidal neurons (PCs) make unitary connections with SOMs using both types, followed by those utilizing only S-Type, and a minority with only F-Type. Sensory experience differentially regulates synapses on SOMs, such that local F-Type synapses change with visual deprivation and S-Type synapses undergo plasticity with crossmodal auditory deprivation. Our results demonstrate that the two types of excitatory synapses add richness to the SOM circuit recruitment and undergo selective plasticity enabling dynamic adaptation of the adult V1. Excitatory synapses on somatostatin sensory neurons in the cortex are not fully characterised. Here the authors report that visual cortex somatostatin neurons are regulated by sensory experience by utilizing two distinct types of excitatory synapses.
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