Real-time imaging of mitochondrial hydrogen peroxide and pH fluctuations in living cells using a fluorescent nanosensor

Analytical Chemistry
Limin YangBo Tang

Abstract

Mitochondrial reactive oxygen species (ROS) and pH fluctuations are closely correlated with mitochondrial dysfunctions, which are implicated in various human diseases including neurodegenerative disorders and cancers. Simultaneously monitoring the changes of ROS and pH of mitochondria remains a major challenge in the mitochondrial biology. In this study, we develop a novel mitochondria-targeted fluorescent nanosensor for real-time imaging of the fluctuations of hydrogen peroxide (H2O2) and pH in living cells. The fluorescence probes for detecting pH and H2O2 were loaded in the small-sized mesoporous silica nanoparticles (MSN). Then the polyethylenimine was attached to cap the pores of MSN, the triphenylphosphonium was further modified to target mitochondria in living cells. Confocal fluorescence imaging indicated that the nanosensor could effectively target mitochondria and successfully achieved real-time imaging of mitochondrial H2O2 and pH fluctuations in living cells. Notably, this is a single nanosensing system that is capable of visualizing multiple subcellular analytes at the same time and position by multicolor fluorescence imaging. The current approach can provide a promising tool to investigate the interplaying roles o...Continue Reading

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Citations

May 22, 2016·Biochimica Et Biophysica Acta·Phillip A WagesJames M Samet
Mar 30, 2017·Biosensors & Bioelectronics·Haidong LiXiaojun Peng
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Jul 31, 2019·Chemical Science·Peng GaoBo Tang
Jan 28, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Jiang Xue DongHong Qun Luo
Dec 22, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Yongchun WeiYanfeng Wang
Aug 29, 2019·ACS Omega·Saswat MohapatraSurajit Ghosh
Nov 5, 2020·Chemical Reviews·Andreas SteineggerSergey M Borisov

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