Assembly of pigeon circovirus-like particles using baculovirus expression system

Area of Science:

• Veterinary Virology
• Immunology
• Vaccine Development

Background:

• Pigeon circovirus (PiCV) infects pigeons of all ages, contributing to young pigeon disease syndrome (YPDS).
• Current PiCV vaccine research faces challenges as the virus cannot be cultured in vitro.
• Virus-like particles (VLPs) offer a promising approach for vaccine development due to their immunogenicity.

Purpose of the Study:

• To express Pigeon circovirus (PiCV) Cap protein using a baculovirus system.
• To assess the self-assembly and immunogenicity of PiCV Cap protein-derived VLPs.
• To evaluate the potential of PiCV VLPs as a vaccine candidate.

Main Methods:

• Utilized the baculovirus expression system to produce Pigeon circovirus (PiCV) Cap protein.
• Characterized the self-assembled virus-like particles (VLPs) for morphology and size.
• Immunized BALB/c mice with PiCV VLPs and adjuvant to assess antibody induction.

Main Results:

• Successfully expressed PiCV Cap protein, which self-assembled into spherical VLPs (15-18 nm).
• Immunization of mice with PiCV VLPs induced specific antibodies against the Cap protein.
• The Cap protein contains neutralizing antibody epitopes, crucial for viral protection.

Conclusions:

• PiCV VLPs can be produced using the baculovirus expression system.
• PiCV VLPs demonstrate immunogenic potential, inducing specific antibody responses.
• PiCV VLPs represent a promising candidate for a novel PiCV vaccine.