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开发了一种对氧不敏感的Nrf2报告器,揭示了在生理性诺莫克西亚下进行的Redox监管

Seyed Mohammad Miri^1,2, Büşra N Ata², Şeyma Çimen^1,3

¹Regenerative and Restorative Medicine Research Center (REMER), Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul 34810, Turkey.

|February 28, 2025

概括

过氧化 (H2O2) 影响细胞信号传输,但其对在正常氧化下对Nrf2活性的影响尚不清楚. 一位对氧不敏感的新记者POINTER透露,H2O2和抗氧化剂通路的抑制是调节Nrf2活性的关键.

科学领域:

细胞生物学细胞生物学
转毒生物学转毒生物学
分子信号传输的方法

背景情况:

活性氧物种,特别是过氧化 (H2O2),对于细胞信号通路至关重要.
核因子红色素2相关因子2 (Nrf2) 是维护氧化还原平衡的关键转录因子.
氧敏感成像的局限性阻碍了对H2O2在生理性诺摩西亚下对Nrf2活性的影响的理解.

研究的目的:

开发和验证一个对Nrf2转录活性不敏感的氧气报告器.
为了研究变化的细胞内H2O2度对Nrf2调节在normoxia和hyperoxia下的影响.
阐明H2O2在调节人类大脑微血管内皮细胞中的Nrf2活性中的作用 (hCMEC/D3).

主要方法:

开发和验证细胞周周对氧不敏感的Nrf2转录性能报告器 (POINTER).
在 normoxia (5 kPa O2) 和 hyperoxia (21 kPa O2) 条件下的hCMEC/D3细胞中应用POINTER.
通过外部应用,化学遗传学和Auranofin治疗来操纵细胞内H2O2水平.

主要成果:

与高氧相比,normoxia下的nrf2转录活性显著降低.
POINTER表明,抗氧化途径的抑制和持续的H2O2升高对于调节Nrf2活性至关重要.
该研究成功地描述了H2O2在不同氧气条件下的Nrf2调节中的作用.

结论:

POINTER系统为研究独立于氧气水平的Nrf2活性提供了一个新的工具.
过氧化和抗氧化剂路径调节是Nrf2转录活性的重要调节剂.
这项研究为H2O2和Nrf2介导的细胞反应之间的复杂关系提供了新的见解.

关键词:

Nrf2 生物传感器过氧化是一种过氧化.迷你GFPFP是什么意思诺尔莫克西亚 (normoxia) 是一个指标.周细胞氧气水平的水平.转录因子的转录因子

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