Host interneurons mediate plasticity reactivated by embryonic inhibitory cell transplantation in mouse visual cortex.

Host interneurons mediate plasticity reactivated by embryonic inhibitory cell transplantation in mouse visual cortex.
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DOI:
10.1038/s41467-021-21097-4
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发表时间:
2021-02-08
影响因子:
16.6
通讯作者:
Gandhi SP
Gandhi SP
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zheng X;Salinas KJ;Velez DXF;Nakayama T;Lin X;Banerjee D;Xu X;Gandhi SP

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成年人的大脑对青少年大脑中感觉环境的变化缺乏敏感性。胚胎中间神经元的移植已被证明可以恢复成年宿主视觉皮层的幼年可塑性。目前尚不清楚移植的中间神经元是否直接介导恢复的皮层可塑性,或者这些细胞是否通过修改宿主中间神经元回路间接起作用。在这里,我们发现,移植诱导的重组小鼠宿主电路是特异性介导的Neuregulin(NRG 1)/ErbB 4信号在主机parvalbumin(PV)interneurons。短暂的视觉剥夺降低了宿主PV中间神经元的视觉活动,但对移植PV中间神经元的反应的影响可以忽略不计。外源性NRG 1既可以防止剥夺诱导的宿主PV中间神经元视觉反应的降低,又可以阻断移植诱导的宿主电路重组。虽然ErbB 4受体从宿主PV中间神经元中的缺失阻断了移植受体中的皮质可塑性,但从供体PV中间神经元中的受体的缺失不会。总之,我们的研究结果表明,移植的胚胎中间神经元通过恢复宿主PV中间神经元的功能来重新激活皮质可塑性。胚胎中间神经元移植可以恢复幼年宿主视皮层的可塑性。在这里,作者表明,移植的胚胎中间神经元通过宿主小清蛋白中间神经元中的Neuregulin/ErbB 4信号转导重新激活皮质可塑性。
The adult brain lacks sensitivity to changes in the sensory environment found in the juvenile brain. The transplantation of embryonic interneurons has been shown to restore juvenile plasticity to the adult host visual cortex. It is unclear whether transplanted interneurons directly mediate the renewed cortical plasticity or whether these cells act indirectly by modifying the host interneuron circuitry. Here we find that the transplant-induced reorganization of mouse host circuits is specifically mediated by Neuregulin (NRG1)/ErbB4 signaling in host parvalbumin (PV) interneurons. Brief visual deprivation reduces the visual activity of host PV interneurons but has negligible effects on the responses of transplanted PV interneurons. Exogenous NRG1 both prevents the deprivation-induced reduction in the visual responses of host PV interneurons and blocks the transplant-induced reorganization of the host circuit. While deletion of ErbB4 receptors from host PV interneurons blocks cortical plasticity in the transplant recipients, deletion of the receptors from the donor PV interneurons does not. Altogether, our results indicate that transplanted embryonic interneurons reactivate cortical plasticity by rejuvenating the function of host PV interneurons. Transplantation of embryonic interneurons can restore juvenile plasticity to the adult host visual cortex. Here, the authors show that transplanted embryonic interneurons reactivate cortical plasticity via Neuregulin/ErbB4 signaling in host parvalbumin interneurons.
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