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Related Experiment Video

Updated: May 22, 2026

Nanosensors to Detect Protease Activity In Vivo for Noninvasive Diagnostics
10:50

Nanosensors to Detect Protease Activity In Vivo for Noninvasive Diagnostics

Published on: July 16, 2018

A robust, high-sensitivity stealth probe for peptidases.

Oliver Thorn-Seshold1, Monica Vargas-Sanchez, Sean McKeon

  • 1Laboratoire de Chimie, CNRS, École Normale Supérieure de Lyon, 46 Allée d'Italie, F-69364 Lyon, France.

Chemical Communications (Cambridge, England)
|May 19, 2012
PubMed
Summary

A new fluorogenic probe system enables highly sensitive detection of aminopeptidase activity. This robust system provides a clear off-ON signal with no false positives, offering rapid and reliable results.

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Area of Science:

  • Biochemistry
  • Chemical Biology
  • Analytical Chemistry

Background:

  • Aminopeptidases are crucial enzymes involved in various biological processes.
  • Sensitive and specific detection methods for aminopeptidase activity are essential for research and diagnostics.
  • Existing methods may suffer from limitations in sensitivity, specificity, or signal stability.

Purpose of the Study:

  • To develop a novel fluorogenic probe system for the sensitive detection of aminopeptidase activity.
  • To create a modular system capable of releasing a highly photostable and insoluble fluorophore.
  • To establish a reliable off-ON detection strategy with minimal false positive signals.

Main Methods:

  • Development of a robust and modular fluorogenic probe system.

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  • Incorporation of an exceptionally photostable, insoluble, phenolic Excited-State Intramolecular Proton Transfer (ESIPT) fluorophore.
  • Evaluation of probe performance, including sensitivity, specificity, and signal kinetics.

    • Main Results:

    • The developed probe system enables highly sensitive off-ON detection of aminopeptidase activity.
    • The released fluorophore exhibits exceptional photostability and insolubility.
    • Probes demonstrated no false positive signals over 24 hours, with signal generation occurring within 10 minutes of activation.

    Conclusions:

    • The novel fluorogenic probe system offers a robust and sensitive method for detecting aminopeptidase activity.
    • The system's modularity and the properties of the released fluorophore contribute to its high performance.
    • This technology has potential applications in biochemical research and diagnostic assays requiring precise enzyme activity monitoring.