An endoplasmic reticulum-directed ROS burst strategy powered by H₂O₂ abundance for chemodynamic/immuno tumor therapy

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Immunotherapy

Background:

• Conventional chemodynamic therapy faces limitations due to low intracellular hydrogen peroxide (H2O2) levels.
• The endoplasmic reticulum (ER) has a high H2O2 concentration, making it a promising site for enhanced therapy.

Purpose of the Study:

• To develop an ER-targeted nanoplatform for chemodynamic therapy.
• To investigate the potential of localized reactive oxygen species (ROS) bursts within the ER to induce cancer cell death and boost antitumor immunity.

Main Methods:

• Design and synthesis of an ER-targeted nanoplatform.
• In vitro and in vivo studies to evaluate ROS generation, ER stress induction, and cell death.
• Assessment of immunogenic cell death and subsequent antitumor immune responses.

Main Results:

• The developed nanoplatform successfully targeted the ER.
• Localized ROS bursts within the ER induced significant ER stress and immunogenic cell death.
• The strategy effectively amplified antitumor immune activation.

Conclusions:

• An ER-targeted chemodynamic nanoplatform can overcome H2O2 supply limitations.
• This approach offers a novel chemodynamic-immunotherapeutic strategy by combining ROS bursts with immune activation for enhanced cancer treatment.