Bioinspired nano-vaccine construction by antigen pre-degradation for boosting cancer personalized immunotherapy

Area of Science:

• Immunology
• Biotechnology
• Oncology

Background:

• Cancer vaccines face challenges due to insufficient cancer antigens and inefficient antigen presentation, limiting their clinical application.
• Current strategies struggle to elicit robust immune responses, hindering the effectiveness of cancer immunotherapy.

Purpose of the Study:

• To develop a novel antigen presentation simplification strategy for cancer vaccines.
• To enhance the utilization of cancer antigens and improve immune response rates in cancer immunotherapy.

Main Methods:

• Inspired by the proteasome-mediated protein degradation pathway, researchers employed extracellular enzymatic hydrolysis to degrade antigen proteins into peptides.
• The pre-degraded antigen peptides were coordinated with calcium phosphate nanoparticles (CaP) to construct a CaP-peptide vaccine (CaP-Pep).

Main Results:

• Pre-degraded antigen peptides demonstrated enhanced antigen-presenting cell (APC) stimulation compared to intact proteins, while retaining antigen specificity and major histocompatibility complex (MHC) affinity.
• The CaP-Pep vaccine induced an efficient personalized immune response in vivo, demonstrating efficacy in multi-model anti-cancer therapy.

Conclusions:

• The bioinspired strategy of extracellular enzymatic hydrolysis offers a promising approach for cancer vaccine construction.
• This method shows broad applicability for various cancer types and significant potential in immunology and translational medicine.