Fluorescence imaging detection of nanodomain redox signaling events at organellar contacts.

Fluorescence imaging detection of nanodomain redox signaling events at organellar contacts.
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细胞器接触纳米域氧化还原信号事件的荧光成像检测。

DOI:
10.1016/j.xpro.2021.101119
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发表时间:
2022-03-18
期刊:
影响因子:
--
通讯作者:
Hajnóczky G
Hajnóczky G
中科院分区:
其他
文献类型:
--
作者:
Booth DM;Várnai P;Joseph SK;Hajnóczky G

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该协议描述了如何可视化,检测和分析氧化还原信号(氧化爆发)在er -线粒体界面。它使用药物诱导的交联将遗传编码的谷胱甘肽氧化还原传感器Grx1roGFP2靶向到细胞器接触位点,以测量与线粒体膜电位瞬时去极化(闪烁)相关的局部氧化还原变化。该策略允许成像氧化还原谷胱甘肽比(GSSG:GSH)在亚细胞区域低于衍射极限具有良好的时间分辨率和最小的光毒性。此外,该策略还适用于pH、H2O2和Ca2+等多种参数。有关使用和执行此配置文件的完整详细信息,请参阅和。使用细胞器间连接物测量氧化还原纳米域的逐步方案线粒体闪烁同时成像指南测量归一化策略以确定氧化还原动力学该方案描述了如何在er -线粒体界面上可视化,检测和分析氧化还原信号(氧化爆发)。它使用药物诱导的交联将遗传编码的谷胱甘肽氧化还原传感器Grx1roGFP2靶向到细胞器接触位点,以测量与线粒体膜电位瞬时去极化(闪烁)相关的局部氧化还原变化。该策略允许成像氧化还原谷胱甘肽比(GSSG:GSH)在亚细胞区域低于衍射极限具有良好的时间分辨率和最小的光毒性。此外,该策略还适用于pH、H2O2和Ca2+等多种参数。
This protocol describes how to visualize, detect, and analyze redox signals (oxidative bursts) at the ER-mitochondrial interface. It uses drug-inducible crosslinking to target the genetically encoded glutathione redox sensor Grx1roGFP2 to organellar contact sites to measure local redox changes associated with transient depolarizations of the mitochondrial membrane potential (flickers). The strategy allows imaging of the oxidized to reduced glutathione ratio (GSSG:GSH) in subcellular regions below the diffraction limit with good temporal resolution and minimum phototoxicity. Moreover, the strategy also applies to diverse parameters including pH, H2O2, and Ca2+. For complete details on the use and execution of this profile, please refer to and. Stepwise protocol for the use of interorganelle linkers to measure redox nanodomains Guidelines for the simultaneous imaging of mitochondrial flickers Measurement normalization strategies to determine redox kinetics This protocol describes how to visualize, detect, and analyze redox signals (oxidative bursts) at the ER-mitochondrial interface. It uses drug-inducible crosslinking to target the genetically encoded glutathione redox sensor Grx1roGFP2 to organellar contact sites to measure local redox changes associated with transient depolarizations of the mitochondrial membrane potential (flickers). The strategy allows imaging of the oxidized to reduced glutathione ratio (GSSG:GSH) in subcellular regions below the diffraction limit with good temporal resolution and minimum phototoxicity. Moreover, the strategy also applies to diverse parameters including pH, H2O2, and Ca2+.
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