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Triggering cell death in cancers using self-illuminating nanocomposites.

Tijana Rajh1,2, Tamara Koritarov1, Ben Blaiszik1

  • 1Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, United States.

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Researchers developed a novel bioinspired semiconductor nanocomposite (TiDoL) that uses cancer-specific activators, like adenosine triphosphate (ATP), to convert light into cell-disrupting agents, enabling targeted cancer cell death with minimal off-target toxicity.

Keywords:
TiO2apoptosisbioluminescencecancerextracellular ATPluciferasenanocompositesreal-time confocal microscopy

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Photocatalysis

Background:

  • Bioinspired photocatalysis offers innovative solutions in diverse fields, including medicine.
  • Targeted cancer therapies aim to improve efficacy and reduce side effects.

Purpose of the Study:

  • To develop a novel bioinspired semiconductor nanocomposite for targeted cancer therapy.
  • To investigate the mechanism of cancer-specific activation and subsequent cell death induction.

Main Methods:

  • Synthesis of a novel semiconductor nanocomposite: nanoTiO2-DOPA-luciferase (TiDoL).
  • Investigation of TiDoL activation by cancer-specific adenosine triphosphate (ATP).
  • In situ and real-time probing of TiDoL interaction with cancerous cells to elucidate the mechanism of action.

Main Results:

  • TiDoL converts light energy into cytotoxic chemical species specifically within cancer tissues.
  • Activation is triggered by elevated adenosine triphosphate (ATP) levels in cancer cells, ensuring localized toxicity.
  • Demonstrated successful induction of apoptotic signaling cascade and cancer cell death.
  • Confirmed no toxicity in non-cancerous cells, highlighting the targeted nature of the therapy.

Conclusions:

  • TiDoL represents a promising bioinspired approach for localized cancer cell destruction.
  • ATP-triggered activation of antibody-targeted semiconductor conjugates offers a potential universal strategy for precise, single-cell-targeted therapies.
  • This approach may lead to medical treatments with enhanced efficacy and reduced side effects.