Precocious deposition of perineuronal nets on Parvalbumin inhibitory neurons transplanted into adult visual cortex.

Precocious deposition of perineuronal nets on Parvalbumin inhibitory neurons transplanted into adult visual cortex.
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DOI:
10.1038/s41598-018-25735-8
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发表时间:
2018-05-10
期刊:
影响因子:
4.6
通讯作者:
Gandhi SP
Gandhi SP
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bradshaw KP;Figueroa Velez DX;Habeeb M;Gandhi SP

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初级视皮层(V1)临界期的结束与周围神经网(PNN)沉积在小白蛋白(PV)抑制神经元上相一致。最近,我们发现,将胚胎抑制性神经元移植到成年V1体内,恢复了一个新的关键期。在这里,我们使用紫藤凝集素(WFA)染色来比较在正常发育期间和在相同细胞年龄移植后PNNS在神经元上的沉积。与以前的研究结果一致,PV和PNN的表达从出生后第14天(P14)的微不足道的水平增加到P70的成熟水平。与P14相反,移植后21d在移植的PV神经元上发现PNN,并持续到移植后105d。这种早熟沉积是PV神经元所特有的,并排除了表达生长抑素的移植神经元。值得注意的是,在移植的抑制性神经元中PV表达的开始遵循幼年V1中PV表达的时间。此外,移植对宿主PNNS没有明显的影响。PNN在移植的PV神经元上的早熟沉积表明,WFA鉴定的PNN的表达不能反映神经元的成熟度,可能不能准确地反映移植诱导的皮质神经回路的可塑性。
The end of the critical period for primary visual cortex (V1) coincides with the deposition of perineuronal nets (PNN) onto Parvalbumin (PV) inhibitory neurons. Recently, we found that transplantation of embryonic inhibitory neurons into adult V1 reinstates a new critical period. Here we used Wisteria Floribunda Agglutinin (WFA) staining to compare the deposition of PNNs onto neurons during normal development and following transplantation at equivalent cell ages. In accord with previous findings, PV and PNN expression increases from negligible levels at postnatal day 14 (P14) to mature levels by P70. In contrast to P14, PNNs are found on transplanted PV neurons by 21 days after transplantation and persist to 105 days after transplantation. This precocious deposition was specific to PV neurons and excluded transplanted neurons expressing Somatostatin. Notably, the onset of PV expression in transplanted inhibitory neurons follows the timing of PV expression in juvenile V1. Moreover, transplantation has no discernible effect on host PNNs. The precocious deposition of PNNs onto transplanted PV neurons suggests that PNN expression identified by WFA does not reflect neuronal maturity and may be an inaccurate marker for transplant-induced plasticity of cortical circuits.
通过三重免疫染色鉴定小鼠视觉皮层中 GABA 能神经元的多种不同亚型。
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