Influenza virus-like particle vaccines

Area of Science:

• Virology
• Vaccinology
• Biotechnology

Background:

• Enveloped virus-like particles (VLPs) are a promising vaccine platform.
• Influenza vaccines are crucial for public health, with conventional methods facing challenges.

Purpose of the Study:

• To evaluate the potential of virus-like particle (VLP) vaccines for influenza.
• To investigate the immunogenicity and protective efficacy of VLPs displaying influenza antigens.

Main Methods:

• Simultaneous expression of influenza hemagglutinin (HA) and neuraminidase (NA) antigens with core proteins (M1 or Gag) in insect or mammalian cells.
• Production of enveloped VLPs with sizes and shapes determined by the core component.
• Assessment of VLP immunogenicity and protective efficacy in influenza challenge models.

Main Results:

• M1- and Gag-based VLPs are strongly immunogenic and protective against both seasonal and highly pathogenic influenza.
• VLP vaccine efficacy correlates with particulate, multivalent composition and correctly folded, active antigens.

Conclusions:

• Influenza VLP vaccines represent a novel vaccine paradigm with potential advantages over conventional egg-based vaccines.
• VLPs offer enhanced immunogenicity and a broader spectrum of protection compared to traditional influenza vaccines.