成年哺乳动物视网膜中通过抑制 Notch 信号和核因子 I (NFI) 因子将神经胶质细胞重新编程为神经元。

Robust reprogramming of glia into neurons by inhibition of Notch signaling and nuclear factor I (NFI) factors in adult mammalian retina.

机构信息

Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.

Department of Ophthalmology and Visual Sciences, University of Michigan School of Medicine, Ann Arbor, MI 48105.

出版信息

Sci Adv. 2024 Jul 12;10(28):eadn2091. doi: 10.1126/sciadv.adn2091.

Abstract

Generation of neurons through direct reprogramming has emerged as a promising therapeutic approach for treating neurodegenerative diseases. In this study, we present an efficient method for reprogramming retinal glial cells into neurons. By suppressing Notch signaling by disrupting either or , we induced mature Müller glial cells to reprogram into bipolar- and amacrine-like neurons. We demonstrate that Rbpj directly activates both Notch effector genes and genes specific to mature Müller glia while indirectly repressing expression of neurogenic basic helix-loop-helix (bHLH) factors. Combined loss of function of and resulted in conversion of nearly all Müller glia to neurons. Last, inducing Müller glial proliferation by overexpression of dominant-active Yap promotes neurogenesis in both - and -deficient Müller glia. These findings demonstrate that Notch signaling and NFI factors act in parallel to inhibit neurogenic competence in mammalian Müller glia and help clarify potential strategies for regenerative therapies aimed at treating retinal dystrophies.

摘要

通过直接重编程产生神经元已成为治疗神经退行性疾病的一种很有前途的治疗方法。在这项研究中,我们提出了一种将视网膜神经胶质细胞重编程为神经元的有效方法。通过破坏 或 来抑制 Notch 信号,我们诱导成熟的 Müller 神经胶质细胞重编程为双极和无长突细胞样神经元。我们证明 Rbpj 直接激活 Notch 效应基因和成熟 Müller 神经胶质细胞特有的基因,同时间接抑制神经发生碱性螺旋-环-螺旋(bHLH)因子的表达。 和 的功能丧失联合导致几乎所有 Müller 神经胶质细胞转化为神经元。最后,通过过表达显性激活的 Yap 诱导 Müller 胶质细胞增殖,促进 - 和 - 缺陷型 Müller 胶质细胞中的神经发生。这些发现表明 Notch 信号和 NFI 因子平行作用以抑制哺乳动物 Müller 胶质细胞的神经发生能力,并有助于阐明针对治疗视网膜营养不良的再生治疗的潜在策略。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/198e/11244444/0504f9388078/sciadv.adn2091-f1.jpg

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