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Intracellular glutathione detection using MnO(2)-nanosheet-modified upconversion nanoparticles.

Renren Deng1, Xiaoji Xie, Marc Vendrell

  • 1Department of Chemistry, National University of Singapore, Singapore 117543.

Journal of the American Chemical Society
|November 24, 2011
PubMed
Summary

Researchers developed a new method using upconversion nanoparticles and manganese dioxide nanosheets for fast, selective detection of glutathione. This approach enables monitoring glutathione levels in living cells, aiding targeted drug delivery development.

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Area of Science:

  • Nanotechnology
  • Biomedical Engineering
  • Analytical Chemistry

Background:

  • Glutathione is a crucial biomarker for cellular health.
  • Existing detection methods can be slow or lack selectivity.
  • Developing rapid and selective detection tools is essential for biomedical applications.

Purpose of the Study:

  • To develop a novel sensing platform for rapid and selective detection of glutathione.
  • To utilize lanthanide-doped upconversion nanoparticles and manganese dioxide nanosheets for luminescence-based sensing.
  • To demonstrate the feasibility of intracellular glutathione monitoring.

Main Methods:

  • Synthesized lanthanide-doped upconversion nanoparticles.
  • Coated nanoparticles with manganese dioxide (MnO(2)) nanosheets.
  • Utilized MnO(2) as a luminescence quencher for upconverted light.
  • Investigated the reduction of MnO(2) by glutathione (GSH) to release luminescence.
  • Validated the detection in aqueous solutions and living cells.

Main Results:

  • Demonstrated a novel design combining upconversion nanoparticles and MnO(2) nanosheets.
  • Achieved rapid and selective detection of glutathione.
  • Observed luminescence turn-on upon reduction of MnO(2) by glutathione.
  • Showcased the potential for intracellular glutathione monitoring.

Conclusions:

  • The developed nanoparticle-based system offers a sensitive and selective method for glutathione detection.
  • This platform facilitates real-time intracellular glutathione monitoring.
  • The findings support the design of advanced platforms for targeted drug and gene delivery.