Dismantlable Coronated Nanoparticles for Coupling the Induction and Perception of Immunogenic Cell Death

Area of Science:

• Nanomedicine
• Cancer Immunology
• Drug Delivery

Background:

• Therapy-induced immunogenic cell death (ICD) activates immune responses against tumors.
• Dendritic cell (DC) TIM-3 receptors can sequester ICD signals, hindering immune surveillance.
• Developing strategies to overcome immune suppression is crucial for effective cancer therapy.

Purpose of the Study:

• To engineer dismantlable nanoparticles that couple ICD induction with DC immune sensing.
• To create a nanocarrier system that overcomes TIM-3 mediated immune suppression.
• To enhance anti-tumor efficacy through spatiotemporally controlled immune activation.

Main Methods:

• Fabrication of coronated nanoparticles (NPs) with a mitoxantrone (MTO) core and a redox-labile anti-TIM-3 (αTIM-3) antibody corona.
• Demonstration of NP core exposure and αTIM-3 release in the tumor microenvironment.
• Evaluation of NP systemic administration in augmenting DC maturation and cytotoxic T cell responses.

Main Results:

• Coronated NPs successfully delivered MTO for ICD induction upon corona disintegration.
• Released αTIM-3 molecules sensitized DCs, enhancing immune surveillance.
• Systemic NP administration promoted DC maturation, T cell recruitment, and improved tumor susceptibility to immunotherapy.
• The nanoplatform reduced MTO-related side effects.

Conclusions:

• Dismantlable coronated NPs offer a spatiotemporally controlled platform for cancer immunotherapy.
• This nanoplatform effectively overcomes TIM-3 mediated immune suppression.
• The strategy holds promise for unleashing host immunity in cancer treatment.