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Photoactivatable Oligoelectrolytes Engendering Pyroptotic Vesicles.

Hyeonji Rha1, HyoungChul Ham2, Yufu Tang3

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|January 28, 2026
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Summary
This summary is machine-generated.

This study introduces NDI-COE, a membrane-anchored molecule for phototherapy. It generates reactive oxygen species and triggers pyroptosis, offering a hypoxia-resistant treatment with built-in imaging capabilities.

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Area of Science:

  • Biomedical Engineering
  • Photochemistry
  • Nanotechnology

Background:

  • Phototherapies face limitations in hypoxic environments due to oxygen dependence.
  • Current methods lack mechanistic clarity and precise control over photochemical activation.
  • Developing oxygen-independent phototherapies is crucial for treating hypoxic conditions.

Purpose of the Study:

  • To develop a molecularly defined, membrane-anchored system for oxygen-independent phototherapy.
  • To investigate the mechanism of action and theranostic potential of the designed molecule.
  • To establish a framework for hypoxia-resistant phototherapy with real-time monitoring.

Main Methods:

  • Synthesized a membrane-anchored conjugated oligoelectrolyte (NDI-COE) with specific functional groups.
  • Investigated its integration into lipid bilayers and photoinduced charge separation.
  • Assessed reactive oxygen species (ROS) generation, pyroptosis activation, and fluorescence properties.

Main Results:

  • NDI-COE efficiently inserts into lipid bilayers, generating O2•− and •OH upon irradiation.
  • The molecule induces potent cytotoxicity and activates pyroptosis via the caspase-3/GSDME pathway.
  • Membrane engagement enhances NDI-COE fluorescence, enabling visualization of pyroptotic vesicles.

Conclusions:

  • NDI-COE provides a hypoxia-resistant phototherapy strategy by utilizing oxygen-independent water oxidation.
  • The system acts as a theranostic agent, allowing real-time monitoring of pyroptotic vesicle formation.
  • This work offers a novel framework for phototherapy and monitoring pyroptosis for immunotherapy.