Reinforcing Calcium Overload via Inflammation-Mediated Targeting to Amplify Pyroptosis and Antitumor Immunity.

Area of Science:

• Biomaterials Science
• Nanomedicine
• Immunotherapy

Background:

• Tumor-associated inflammation is a therapeutic target but underexploited in nanomedicine.
• Current inflammation-driven strategies like pyroptosis face challenges in induction efficiency and tumor targeting.

Purpose of the Study:

• To engineer a nanoplatform that exploits tumor inflammation to enhance pyroptosis and anti-tumor immunity.
• To develop a biomimetic system for improved tumor targeting and pyroptotic amplification.

Main Methods:

• Development of neutrophil membrane-camouflaged nanoplatforms (RC@NMVs) with calcium phosphate nanoparticles and ruthenium red.
• Induction of intracellular calcium dyshomeostasis and pyroptosis in tumor cells.
• In vivo evaluation of tumor accumulation, pyroptosis, tumor inhibition, and immune response.

Main Results:

• RC@NMVs effectively induced calcium overload and gasdermin-mediated pyroptosis.
• Amplified inflammation enhanced tumor accumulation of subsequent RC@NMVs.
• Demonstrated significant tumor inhibition and durable anti-tumor immune responses, preventing recurrence and metastasis.

Conclusions:

• The engineered nanoplatform successfully harnesses inflammation for targeted pyroptosis and immune activation.
• This biomimetic strategy offers a promising approach for effective cancer therapy by amplifying pyroptosis and immune responses.