A Long-wavelength Emissive Phenothiazine Derived Fluorescent Probe for Detecting HOCl Upregulation in 5-FU Stimulated Living Cells
Bingya Wang , Xiaomei Guo , Zuodong Liu , Yongquan Wu , Ji-Ting Hou
Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (2) : 609 -615.
A Long-wavelength Emissive Phenothiazine Derived Fluorescent Probe for Detecting HOCl Upregulation in 5-FU Stimulated Living Cells
The endogenous hypochlorous acid(HOCl) has been evidenced in a variety of cellular courses. However, the role of HOCl in most pathophysiological processes still keeps unclear because of the limited detecting tools. In this work, we presented the preparation of a phenothiazine-derived fluorescent probe ClO-1 for HOCl detection with a cyanopyridinium moiety to improve its water solubility and lengthen its emission wavelength. The HOCl-promoted oxidation of sulfur atom in the probe resulted in a 460-fold emission intensity enhancement at 635 nm with high selectivity and sensitivity(detection limit: 1.12 nmol/L). The rapid response(5 s) also endowed the probe with real-time detection ability. Successfully, ClO-1 was devoted to the bioimaging of endogenous HOCl in inflamed RAW 264.7 cells and 5-fluorouracil-treated MCF-7 cells.
Fluorescent probe / Phenothiazine / Hypochlorous acid / 5-Fluorouracil / Bioimaging
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