相关实验视频

Updated: Sep 16, 2025

Primary Cell Cultures to Study the Regeneration Potential of Murine Müller Glia after MicroRNA Treatment

Primary Cell Cultures to Study the Regeneration Potential of Murine Müller Glia after MicroRNA Treatment

Published on: March 28, 2022

对于视网膜神经发生和细胞命运规范,不需要Ptbp1

Haley Appel¹, Rogger P Carmen-Orozco¹, Clayton P Santiago¹

¹Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA.

bioRxiv : the preprint server for biology

|July 9, 2025

概括

RNA结合蛋白 Ptbp1 对视网膜发育没有必要. 视网膜原始体中Ptbp1的损失并没有导致质转化为神经元,这挑战了它在神经发生过程中所扮演的角色.

科学领域:

发育生物学是发展生物学.
神经科学是一个神经科学.
分子生物学分子生物学

背景情况:

假设RNA结合蛋白Ptbp1 (聚皮里米丁管结合蛋白1) 通过抑制神经生成来控制神经元命运.
之前的研究表明,Ptbp1损失促进神经发生,但最近的遗传证据对于质转化为神经元的转化是不确定的.

研究的目的:

研究Ptbp1在视网膜内*in vivo*发育神经发生中的作用.
确定 Ptbp1 是否对视网膜原生细胞分化和神经元命运规范至关重要.

主要方法:

在小鼠的视网膜原生细胞中*Ptbp1*基因的条件破坏.
免疫抑制以确认 Ptbp1 功能丧失.
大量和单细胞RNA测序 (scRNA-Seq) 用于分析突变视网膜在不同发育阶段的转录和拼接变化.

主要成果:

Ptbp1在视网膜前体和穆勒细胞中表达,但在成熟的神经元中表达不出.
视网膜原体中Ptbp1的损失加速了晚期原体和光受体基因的表达,并改变了拼接模式.
没有观察到视网膜层层化,祖细胞增殖或细胞命运规范的缺陷;scRNA-Seq只显示了适度的转录变化.

结论:

Ptbp1对于正常的视网膜发育和神经发生是不可或缺的.
根据这些发现,Ptbp1作为神经生成的主抑制剂的拟议作用需要重新评估.

更多相关视频

Induction of Protein Deletion Through In Utero Electroporation to Define Deficits in Neuronal Migration in Transgenic Models

Induction of Protein Deletion Through In Utero Electroporation to Define Deficits in Neuronal Migration in Transgenic Models

Published on: January 12, 2015

In Vivo Targeting of Neural Progenitor Cells in Ferret Neocortex by In Utero Electroporation

In Vivo Targeting of Neural Progenitor Cells in Ferret Neocortex by In Utero Electroporation

Published on: May 6, 2020

相关概念视频

The Retinoblastoma Gene

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...