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在整个中枢神经系统的神经元中,Nrf2的有限表达

Daniel C Levings¹, Salil Saurav Pathak¹, Yi-Mei Yang²

¹Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, 55812, USA.

|August 6, 2023

概括

核因素红色素2相关因子2 (Nrf2) 途径在非神经元细胞中高度活跃,但在整个中枢神经系统 (CNS) 的成熟神经元中被抑制. 这种对Nrf2 (编码为Nfe2l2) 的神经元抑制在各种人类中枢神经系统疾病中得到维持.

科学领域:

神经科学是一个神经科学.
分子生物学分子生物学
遗传学遗传学是一个

背景情况:

由Nfe2l2编码的核因子红色素2相关因子2 (Nrf2),是一种调节细胞对氧化应激反应的转录因子.
Nrf2通常被认为是一个无处不在的途径,但它在神经元群体中的表达并不成熟.
了解Nrf2表达模式对于理解中枢神经系统 (CNS) 中细胞防御机制至关重要.

研究的目的:

研究Nrf2 (Nfe2l2) 的表达模式及其在中枢神经系统中不同细胞类型的调节元件.
确定神经元中的Nrf2抑制是否在小鼠和人类中枢神经系统中广泛存在.
在人类中枢神经系统疾病的背景下,评估这种表达模式的保存.

主要方法:

对来自小鼠和人类中枢神经系统的单细胞RNA测序数据集的分析.
对Nfe2l2基因表达水平的量化.
评估Nfe2l2位点的染色质可访问性,以推断调节活性.

主要成果:

发现Nfe2l2表达在老鼠和人类中枢神经系统中绝大多数成熟神经元中被显著抑制.
相反,Nfe2l2在中枢神经系统内的非神经元支持细胞中表达高.
这种独特的表达模式在各种人类中枢神经系统疾病中持续存在,关键的Nrf2向基因,如Slc7a11,也在神经元中发现了低水平.

结论:

神经元通过保持低Nfe2l2表达来积极抑制Nrf2活动,与支持质细胞的高表达形成鲜明对比.
与其他中枢神经系统细胞相比,这种神经元特异性抑制表明神经元中氧化应激反应途径的独特作用或调节.
这些发现挑战了Nrf2作为普遍无处不在的途径的概念,突出了中枢神经系统内的细胞类型特定调节.

关键词:

脑子脑子脑子脑子基因表达基因表达基因表达这就是NRF2的NRF2.神经元神经元是一个神经元.有反应性氧物种的反应性氧物种.一个单细胞RNA-seqq.

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