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Chimeric potyvirus-like particles as vaccine carriers
M N Jagadish1, S J Edwards, M B Hayden
1CSIRO, Division of Biomolecular Engineering, Parkville, Victoria, Australia.
Intervirology
|January 1, 1996
Summary
Potyvirus coat protein (CP) self-assembles into virus-like particles (VLPs) that can carry foreign antigens. These chimeric VLPs are highly immunogenic, offering a versatile, non-pathogenic vaccine carrier platform.
Area of Science:
- Virology
- Immunology
- Biotechnology
Background:
- Subunit vaccines presented as ordered aggregates can enhance immune responses.
- Potyvirus coat protein (CP) monomers can self-assemble into virus-like particles (VLPs).
Purpose of the Study:
- To investigate the potential of potyvirus-like particles (PVLPs) as a versatile vaccine carrier.
- To determine if hybrid CP monomers can assemble into functional PVLPs displaying foreign antigens.
Main Methods:
- Produced potyvirus CP monomers in Escherichia coli, yeast, and insect cells.
- Created hybrid CP monomers with fused peptides or antigens.
- Assembled hybrid CP monomers into chimeric PVLPs.
- Assessed immunogenicity of chimeric PVLPs in mice and rabbits.
Main Results:
- Potyvirus CP monomers self-polymerized into PVLPs in heterologous hosts.
- N- and C-terminal regions of CP are surface-exposed and dispensable for assembly.
- Hybrid CP monomers assembled into chimeric PVLPs displaying fused antigens.
- Chimeric PVLPs elicited strong immune responses in mice and rabbits without adjuvant.
Conclusions:
- Potyvirus CP is a versatile platform for creating chimeric PVLPs.
- PVLPs can effectively display foreign antigens on their surface.
- PVLPs represent an attractive, non-pathogenic vaccine carrier system.