Rapid and efficient immune response induced by a designed modular cholera toxin B subunit (CTB)-based self-assembling...

Area of Science:

• Immunology
• Nanotechnology
• Vaccine Development

Background:

• Modular self-assembling nanoparticles offer innovative vaccine design.
• Understanding their immune activation mechanisms is crucial for advancement.
• Current nanocarriers have limitations in efficacy and expansion.

Purpose of the Study:

• To investigate the rapid immune activation mechanism of a novel modular nanovaccine.
• To assess its potential as a safe and effective vaccination strategy.

Main Methods:

• Self-assembly of a nanovaccine using cholera toxin B subunit (CTB) and an unnatural trimer domain.
• Presentation of S. Paratyphi A O-polysaccharide antigen.
• Investigation using single-cell RNA sequencing, in vivo, and in vitro experiments.

Main Results:

• The nanovaccine efficiently targets lymph nodes and antigen-presenting cells.
• Dendritic cells, macrophages, B cells, and neutrophils participate in antigen presentation.
• Demonstrated potent humoral immune response and robust prophylactic effects.

Conclusions:

• The novel nanovaccine provides a promising candidate for infectious diseases.
• It outperforms traditional CTB carriers in eliciting protective immunity.
• This work advances the design and application of self-assembled nanoparticles for vaccination.