Limited expression of Nrf2 in neurons across the central nervous system.

Limited expression of Nrf2 in neurons across the central nervous system.
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DOI:
10.1016/j.redox.2023.102830
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发表时间:
2023-09
期刊:
影响因子:
11.4
通讯作者:
Slattery, Matthew
Slattery, Matthew
中科院分区:
生物学1区
文献类型:
--
作者:
Levings, Daniel C.;Pathak, Salil Saurav;Yang, Yi-Mei;Slattery, Matthew

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Nrf2 由 Nfe2l2 基因编码,是一种广泛表达的转录因子,可调节基因表达以响应活性氧 (ROS) 和氧化应激。它通常被称为普遍存在的通路,但这种概括忽略了表明 Nrf2 在某些神经元群体中基本上不表达的研究。为了探索这种模式是否延伸到整个中枢神经系统 (CNS),我们量化了多个单细胞数据集中 Nfe2l2 基因座的 Nfe2l2 表达和染色质可及性。在小鼠和人类中枢神经系统中,Nfe2l2 在几乎所有成熟神经元中都受到抑制,但在非神经元支持细胞中高度表达,并且这种模式在多种人类中枢神经系统疾病中都很有效。关键 Nrf2 靶基因的一个子集,如 Slc7a11,在神经元中也仍然很低。因此,这些数据表明,虽然大多数细胞表达 Nfe2l2,其活性由 ROS 水平决定,但神经元通过保持 Nfe2l2 低表达来主动避免 Nrf2 活性。
Nrf2, encoded by the gene Nfe2l2, is a broadly expressed transcription factor that regulates gene expression in response to reactive oxygen species (ROS) and oxidative stress. It is commonly referred to as a ubiquitous pathway, but this generalization overlooks work indicating that Nrf2 is essentially unexpressed in some neuronal populations. To explore whether this pattern extends throughout the central nervous system (CNS), we quantified Nfe2l2 expression and chromatin accessibility at the Nfe2l2 locus across multiple single cell datasets. In both the mouse and human CNS, Nfe2l2 was repressed in almost all mature neurons, but highly expressed in non-neuronal support cells, and this pattern was robust across multiple human CNS diseases. A subset of key Nrf2 target genes, like Slc7a11, also remained low in neurons. Thus, these data suggest that while most cells express Nfe2l2, with activity determined by ROS levels, neurons actively avoid Nrf2 activity by keeping Nfe2l2 expression low.
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