4.7 Article

A dual lock-and-key two photon fluorescence probe in response to hydrogen peroxide and viscosity: Application in cellular imaging and inflammation therapy

Journal

TALANTA
Volume 235, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.talanta.2021.122719

Keywords

Hydrogen peroxide; Viscosity; Hydrogen sulfide; Two-photon; Inflammatory process

Funding

  1. National Natural Science Foundation of China [81671910]
  2. Natural Science Foundation of Shaanxi [2020JM-069]
  3. Shaanxi Province Foundation of China [2019KJXX-089]
  4. Key Sci-entific Research Group of Shaanxi Province [2020TD-009]
  5. Key Scien-tific Research Program of Shaanxi Provincial Education Department (Collaborative Innovation Center project) [20JY003]

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The dual lock-and-key fluorescence probe demonstrated dual responses towards hydrogen peroxide and viscosity in vitro. In cellular experiments, the probe showed good biocompatibility, low toxicity, and responses towards hydrogen peroxide.
Here, a dual lock-and-key fluorescence probe was developed for visualizing the inflammatory process in myocardial H9C2 cells. The probe possessed two-photon properties, viscosity sensitivity, and hydrogen peroxide (H2O2) responsiveness. A thiocarbamate spacer between fluorophore and H2O2 responsive unit enabled the release of carbonyl sulfide (COS). This rapidly converts to the anti-inflammatory hydrogen sulfide (H2S) by the ubiquitous enzyme carbon anhydrase. The probe displayed a dual response towards hydrogen peroxide and viscosity in vitro. No obvious fluorescence changes were observed towards either hydrogen peroxide or viscosity alone. In cellular experiments, the probe demonstrated good biocompatibility, low toxicity, and was shown responses towards exogenous and endogenous hydrogen peroxide under viscosity conditions. LPS induced cell inflammation showed it was able to effectively alleviate the inflammation-caused damage by releasing H2S and eliminating H2O2. The new protocol demonstrates its promising to achieve diagnosis and treatment of cellular inflammatory process.

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