1. Determination of Hydrogen Sulfide in Endoplasmic Reticulum by Two-Photon Fluorescence.
- Author
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Ma, Qingqing, Xiao, Haibin, Wang, Kai, Liu, Xueli, and Liu, Yuying
- Subjects
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ENDOPLASMIC reticulum , *HYDROGEN sulfide , *FLUORESCENCE , *FLUORESCENT probes , *CELL imaging , *FLUORESCENCE microscopy - Abstract
An endoplasmic reticulum (ER) targetable two-photon fluorescent probe termed ER-N3 is presented for the determination of hydrogen sulfide (H2S) in living cells and mice. The results demonstrate that ER-N3 was highly selective and sensitive to H2S. Confocal fluorescence imaging in living cells indicated that ER-N3 was accumulated in the endoplasmic reticulum and visualized exogenous and endogenous H2S production. Moreover, a burst of H2S upregulated by the nitric oxide donor sodium nitroprusside was monitored. Meanwhile, the increase of H2S ended following the addition of DL-propargylglycine, an inhibitor for cystathionine β-synthase and cystathionine γ-lyase that are the main sources of H2S. Importantly, the exogenous H2S was visualized in abdominal tissue of mice by utilizing two-photon fluorescence microscopy. The ER-N3 fluorescent probe may be an excellent tool to image H2S fluctuations in the endoplasmic reticulum and characterize the relationship between H2S and disease in vivo. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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