Transiently Transfected Mammalian Cell Cultures: An Adaptable and Effective Platform for Virus-like Particle-Based...

Area of Science:

• Veterinary Virology
• Vaccine Technology
• Molecular Biology

Background:

• RNA viruses like foot-and-mouth disease virus (FMDV) evolve rapidly, necessitating frequent vaccine updates.
• Current vaccine production methods are costly and technically challenging, especially for rapidly mutating viruses.
• Existing platforms struggle to keep pace with viral strain emergence, impacting vaccine efficacy.

Purpose of the Study:

• To develop a rapid and adaptable vaccine production platform for FMDV.
• To create virus-like particles (VLPs) that elicit protective immunity against FMDV.
• To demonstrate the efficacy of VLP-based vaccines in target animal models.

Main Methods:

• Utilized a plasmid-based system for transient transfection of mammalian cell cultures.
• Engineered the platform for rapid adaptation by modifying FMDV capsid polypeptide nucleic acid sequences.
• Formulated vaccines using VLPs produced by the novel platform.

Main Results:

• The developed platform successfully produced intact capsid epitopes required for immunity.
• Vaccines formulated with VLPs conferred complete protection against clinical foot-and-mouth disease in swine and cattle.
• The platform demonstrated rapid adaptability to new viral strains and serotypes.

Conclusions:

• The plasmid-based VLP production platform offers a rapid response adaptable to emerging FMDV strains.
• This technology combines advantages of nucleic-acid-based vaccines with the need for intact capsid epitopes.
• The platform obviates the need for high biocontainment facilities for inactivated whole-virus vaccine production.