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A novel nanoplatform (PE@PTGA) effectively triggers ferroptosis and apoptosis in cancer cells. This innovative approach shows promise for cancer therapy by overcoming erastin

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Cancer Research

Background:

  • Ferroptosis is a novel cell death pathway with therapeutic potential in oncology.
  • Erastin is an effective ferroptosis inducer but faces clinical limitations due to poor water solubility.
  • Developing targeted drug delivery systems is crucial for enhancing cancer therapy efficacy.

Purpose of the Study:

  • To construct an innovative nanoplatform (PE@PTGA) for co-delivering protoporphyrin IX (PpIX) and erastin.
  • To investigate the synergistic effects of ferroptosis and apoptosis induction in hepatocellular carcinoma (HCC).
  • To evaluate the therapeutic efficacy and biocompatibility of the PE@PTGA nanoplatform in an HCC xenograft model.

Main Methods:

  • Fabrication of amphiphilic polymer-coated nanoparticles (PE@PTGA) encapsulating PpIX and erastin.
  • In vitro and in vivo evaluation of nanoparticle cellular uptake and drug release in HCC cells.
  • Assessment of light-triggered hyperthermia and reactive oxygen species (ROS) generation.
  • Analysis of ferroptosis and apoptosis pathways activation in tumor tissues.
  • Evaluation of tumor growth inhibition and systemic toxicity in a mouse model.

Main Results:

  • PE@PTGA nanoparticles successfully delivered PpIX and erastin into HCC cells.
  • Light stimulation activated PpIX for hyperthermia and ROS generation, enhancing erastin-induced ferroptosis.
  • PE@PTGA demonstrated synergistic inhibition of tumor growth by activating both ferroptosis and apoptosis.
  • The nanoplatform exhibited low toxicity and good biocompatibility in vivo.

Conclusions:

  • The PE@PTGA nanoplatform offers a promising strategy for cancer treatment by inducing ferroptosis and apoptosis.
  • This approach overcomes the limitations of erastin's poor water solubility for potential clinical applications.
  • PE@PTGA shows significant potential for optimizing oncotherapy with favorable safety profiles.