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Real-Time Visualization of Lysosome Destruction Using a Photosensitive Toluidine Blue Nanogel

Weiqi Zhang1, Ching-Hsuan Tung1

  • 1Molecular Imaging Innovations Institute, Department of Radiology, Weill Cornell Medicine, 413 East 69th Street, Box 290, New York, NY, 10021, USA.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 10, 2018
PubMed

Insights

Researchers developed a light-activated nanogel to safely break open lysosomes for enhanced intracellular drug delivery. This method uses clinically approved materials for controlled drug release, minimizing toxicity risks associated with current approaches.

Area of Science:

  • Biotechnology
  • Nanomedicine
  • Cell Biology

Background:

  • Lysosomal disruption is key for intracellular drug delivery.
  • Current methods risk toxicity and uncontrolled membrane rupture.
  • Novel strategies are needed for safe and controlled lysosomal escape.

Purpose of the Study:

  • To develop a light-detonated system for lysosomal disruption.
  • To utilize clinically approved materials for enhanced biocompatibility.
  • To achieve spatiotemporally controlled intracellular drug delivery.

Main Methods:

  • Hyaluronan (HA) nanogels were formulated with toludine blue (TB).
  • HA/TB nanogels were concentrated within lysosomes.
  • Light activation triggered reactive oxygen species generation for lysosome destruction.

Main Results:

  • Light-activated TB within HA nanogels effectively disrupted lysosomes in situ.
  • Fluorescence tracking confirmed lysosomal escape and nuclear translocation.
  • The system demonstrated biocompatibility using clinically approved components.

Conclusions:

  • Light-detonated HA/TB nanogels offer a safe and controlled method for lysosomal disruption.
  • This approach enhances intracellular drug delivery potential.
  • The strategy minimizes risks associated with physical membrane disruption.
Keywords:
lysosomesnanoparticlesphotodynamic therapyreactive oxygen speciestoluidine blue

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