Time-Gated Detection of Cystathionine γ-Lyase Activity and Inhibition with a Selective, Luminogenic Hydrogen Sulfide Sensor.

ABSTRACT: Herein, we report the design, synthesis, and characterization of a lanthanide^III complex-based probe for the time-gated luminescence detection of hydrogen sulfide (H₂ S) in aqueous media. The probe's unique sensing mechanism relies on the selective reduction of azide to amine by sulfide, followed by intramolecular cyclization to form a quinolinone. The quinolinone is a sensitizer that absorbs near-UV light and transfers excitation energy to coordinated Tb^III or Eu^III ions to trigger a strong "turn-on" luminescence response with ms-scale lifetimes characteristic of lanthanide complexes. Using this probe, we developed a robust, high throughput screening (HTS) assay for detecting H₂ S generated by cystathionine γ-lyase (CSE), one of the m

SUBMITTER: Yao Y 

PROVIDER: S-EPMC5250566 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature