Virus-like Magnetic Mesoporous Silica Particles as a Universal Vaccination Platform against Pathogenic Infections

Area of Science:

• Nanotechnology and Materials Science
• Immunology and Vaccinology
• Synthetic Biology

Background:

• Vaccination is crucial for preventing infectious diseases but often limited by poor antigen presentation and immune activation.
• Existing vaccine platforms struggle to effectively stimulate robust immune responses against various pathogens.

Purpose of the Study:

• To develop a universal vaccination platform using virus-like magnetic mesoporous silica nanoparticles (MagParV).
• To enhance antigen presentation and immune activation for improved vaccine efficacy against pathogenic infections.

Main Methods:

• Constructed MagParV by integrating synthetic biology-based endoplasmic reticulum-targeting vesicles with magnetic mesoporous silica particles.
• Evaluated MagParV's antigen-loading capacity, endoplasmic reticulum targeting, and dendritic cell antigen presentation.
• Assessed antibody production and protection against systemic fungal infection in a mouse model after prime-boost vaccination with MagParV and alternating magnetic field (AMF).

Main Results:

• MagParV demonstrated high antigen-loading capacity and effectively targeted the endoplasmic reticulum, promoting antigen presentation.
• Prime-boost vaccination with antigen-loaded MagParV and AMF significantly elicited specific antibody production against fungal, bacterial, and viral antigens.
• The platform provided effective protection against severe systemic fungal infections in a mouse model.

Conclusions:

• MagParV serves as a promising universal vaccination platform for enhancing immune responses.
• Synthetic biology-facilitated green manufacturing of vaccines is realized, paving the way for magnetism-activated vaccination strategies.
• This platform offers a novel approach for developing effective vaccines against a wide range of pathogenic infections.