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

Spectrochim Acta A Mol Biomol Spectrosc. 2021 Feb 15:247:119105. doi: 10.1016/j.saa.2020.119105. Epub 2020 Oct 24.

Abstract

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.

Keywords: Cell imaging; Fluorescent probes; Hydrogen polysulfide; In vivo imaging; Red-emitting.

MeSH terms

  • Animals
  • Fluorescent Dyes*
  • Hydrogen
  • Hydrogen Sulfide*
  • Sulfides
  • Zebrafish

Substances

  • Fluorescent Dyes
  • Sulfides
  • Hydrogen
  • polysulfide
  • Hydrogen Sulfide