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Ratiometric Biosensor for Aggregation-Induced Emission-Guided Precise Photodynamic Therapy.

Kai Han1, Shi-Bo Wang1, Qi Lei1

  • 1Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry and ‡The Institute for Advanced Studies, Wuhan University , Wuhan 430072, China.

ACS Nano
|September 9, 2015
PubMed
Summary
This summary is machine-generated.

A novel biosensor guides precise photodynamic therapy by detecting matrix metalloproteinase-2 (MMP-2) and differentiating tumor cells. This MMP-2 responsive aggregation-induced emission (AIE) biosensor enables accurate, real-time feedback for efficient phototherapy.

Keywords:
MMP-2 responsiveaggregation-induced emissionphotodynamic therapyratiometric biosensortumor

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Oncology

Background:

  • Photodynamic therapy (PDT) efficacy is limited by challenges in selecting optimal irradiation sites and timing.
  • Precise tumor targeting and real-time monitoring are crucial for enhancing PDT outcomes and minimizing side effects.

Purpose of the Study:

  • To design and synthesize a novel matrix metalloproteinase-2 (MMP-2) responsive ratiometric biosensor for aggregation-induced emission (AIE)-guided precise photodynamic therapy.
  • To develop a method for accurately differentiating tumor cells from healthy cells using fluorescence ratios.
  • To evaluate the in vivo performance of the biosensor for real-time feedback-guided phototherapy.

Main Methods:

  • Synthesis of a ratiometric biosensor exhibiting MMP-2 responsive AIE behavior.
  • Utilizing the fluorescence ratio between tetraphenylethylene and protoporphyrin IX (PpIX) to distinguish tumor cells.
  • In vivo studies to assess tumor accumulation, blood retention, and therapeutic efficacy.

Main Results:

  • The biosensor demonstrated MMP-2 responsive AIE characteristics.
  • Accurate differentiation of tumor cells from healthy cells was achieved via fluorescence ratio.
  • Preferential accumulation in tumor tissue with prolonged blood retention was observed in vivo.
  • Real-time feedback from PpIX and AIE fluorescence guided efficient in vivo photodynamic therapy.

Conclusions:

  • The developed MMP-2 responsive AIE biosensor enables precise, feedback-guided photodynamic therapy.
  • This approach offers a promising strategy for precise medicine, particularly in phototherapy applications.
  • The biosensor's ability to differentiate tumor cells and provide real-time guidance enhances therapeutic accuracy.