A semi-naphthorhodafluor-based red-emitting fluorescent probe for tracking of hydrogen polysulfide in living cells and zebrafish

• Published in: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2021-02, Vol.247, p.119105, Article 119105
• Main Authors: Ma, Yingying, Xu, Zhencai, Sun, Qi, Wang, Linlin, Liu, Heng, Yu, Fabiao
• Format: Article
• Language: English
• Subjects: Cell imaging; Fluorescent probes; Hydrogen polysulfide; In vivo imaging; Red-emitting
• ISSN: 1386-1425
• DOI: 10.1016/j.saa.2020.119105

[Display omitted] •A semi-naphthorhodafluor-based red-emitting fluorescent probe SNARF-H2Sn for selective detection of H2Sn was designed.•The addition of H2Sn would result in a > 1000-fold fluorescence enhancement within 10 min.•SNARF-H2Sn was successfully employed to image exogenous/endogenous H2Sn in living cells and zebrafish. Hydrogen polysulfides (H2Sn, n ≥ 2) is recently regarded as a potential signaling molecule which shows a higher efficiency than hydrogen sulfides (H2S) in regulating enzymes and ion channels. However, the development of specific fluorescent probes for H2Sn with long-wavelength emission (>600 nm) are still rare. In this work, a semi-naphthorhodafluor-based red-emitting fluorescent probe SNARF-H2Sn containing a phenyl 2-(benzoylthio) benzoate responsive unit was constructed. SNARF-H2Sn was capable of selectively detecting H2Sn over other reactive sulfur species. Treatment with H2Sn would result in a > 1000-fold fluorescence enhancement within 10 min. SNARF-H2Sn showed a low limit of detection down to 6.7 nM, and further enabled to visualize exogenous/endogenous H2Sn in living A549 cells and zebrafish.