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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Author Spotlight: Advancements in Nanoparticle Technology for Drug Delivery and Immunotherapy
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Nanotechnology-enabled Chemodynamic Therapy and Immunotherapy.

Taixia Wang1, Xiaohong Xu1, Kun Zhang1

  • 1Department of Medical Ultrasound, Shanghai Tenth People's Hospital, Ultrasound Research and Education Institute, Shanghai Engineering Research Center of Ultrasound Diagnosis and Treatment, Tongji University School of Medicine, 301 Yan-chang-zhong Road, Shanghai, 200072, China.

Current Cancer Drug Targets
|February 23, 2021
PubMed
Summary

Chemodynamic therapy (CDT) uses reactive oxygen species (ROS) to fight tumors. Nanotechnology enhances CDT, especially when combined with immunotherapy, to improve anti-tumor effects and overcome limitations.

Keywords:
Reactive oxygen specieschemodynamic therapydendritic cells (DCs).immunotherapynanotechnologysynergistic therapy

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Cancer Therapy
  • Immunology

Background:

  • High levels of reactive oxygen species (ROS) demonstrate potent anti-tumor effects through apoptosis and necroptosis.
  • Chemodynamic therapy (CDT) leverages ROS generation, like hydroxyl radicals (·OH), via Fenton/Fenton-like reactions for tumor cell killing.
  • ROS can enhance tumor-associated antigen exposure, promoting antigen-presenting cell uptake and activating systemic immune responses.

Purpose of the Study:

  • To provide a comprehensive overview of nanotechnology-enabled chemodynamic therapy strategies for cancer treatment.
  • To highlight the synergistic potential of combining CDT with immunotherapy to enhance anti-tumor efficacy.
  • To discuss current challenges and future directions in the field of CDT.

Main Methods:

  • Review and synthesis of state-of-the-art strategies in nanotechnology-enabled CDT.
  • Analysis of mechanisms by which ROS induce tumor cell death and immune responses.
  • Discussion of combined CDT-immunotherapy approaches for improved tumor treatment outcomes.

Main Results:

  • Nanotechnology plays a crucial role in advancing CDT strategies.
  • Combining CDT with immunotherapy shows promise in overcoming limitations of monotherapy.
  • Enhanced ROS production and immune activation are key benefits of these integrated approaches.

Conclusions:

  • Nanotechnology-based CDT offers a promising therapeutic avenue for cancer.
  • Combination strategies, particularly with immunotherapy, are essential for maximizing anti-tumor effects.
  • Addressing existing challenges is critical for the clinical translation of CDT.