Abstract
Superoxide anion (O2•−) is an important reactive oxygen species (ROS), and plays critical roles in biological systems. ER stress has close relation with many metabolic diseases, and could lead to the abnormal production of ROS including O2•−. Herein, we present an ER-targeting probe (ER-Tf) for the detection of O2•− in living cells. The probe ER-Tf used triflate as the response site for O2•−, and employed p-methylbenzenesulfonamide as ER-targeting moiety. In response to O2•−, the triflate of the probe ER-Tf converted to hydroxyl group, providing strong blue emission under the excitation of ultraviolet light. The probe ER-Tf exhibited high sensitivity and selectivity to O2•−. Bioimaging experiments showed that the probe ER-Tf can be applied to detect O2•− at ER, and also demonstrated that rotenone could increase the generation of O2•− in living cells, while the O2•− level at ER showed no remarkable change during ferroptosis.
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This work was supported by NSFC (51602127) and the Natural Science Foundation of Shandong Province (ZR2021MB022).
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by H. Wei, Y. Wang, Q. Chen, Y. Sun, T. Yue and B. Dong. The first draft of the manuscript was written by H. Wei, T. Yue and B. Dong. All authors read and approved the final manuscript.
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Wei, H., Wang, Y., Chen, Q. et al. Development of an Endoplasmic Reticulum-targeting Fluorescent Probe for the Imaging of Superoxide Anion in Living Cells. J Fluoresc 33, 509–515 (2023). https://doi.org/10.1007/s10895-022-03079-x
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DOI: https://doi.org/10.1007/s10895-022-03079-x