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Insect-specific virus platforms for arbovirus vaccine development.
Roy A Hall1,2, Wilson Nguyen3, Alexander A Khromykh1,2
1School of Chemistry and Molecular Biosciences, University of Queensland, St. Lucia, QLD, Australia.
Frontiers in Immunology
|March 31, 2025
Summary
Insect-specific viruses (ISVs) are promising platforms for novel whole virus vaccines. Chimeric vaccines using these platforms show safety and efficacy in preclinical models, offering a new approach for disease prevention.
Area of Science:
- Virology
- Vaccinology
- Biotechnology
Background:
- Insect-specific viruses (ISVs), including mosquito alphaviruses and orthoflaviviruses, are being explored as vaccine platforms.
- These ISVs can accommodate structural polyproteins from pathogenic alphaviruses and orthoflaviviruses, creating chimeric viruses.
Purpose of the Study:
- To review the progress of ISV-based chimeric vaccine technology.
- To highlight the potential of ISVs for developing whole virus vaccines against human and veterinary pathogens.
Main Methods:
- Development of chimeric vaccines by substituting ISV structural polyproteins with those from pathogenic viruses.
- Evaluation of vaccine safety and efficacy in various animal models, including mice, non-human primates, crocodiles, and pigs.
Main Results:
- ISV-based chimeric vaccines demonstrated safety and efficacy in preclinical evaluations.
- These vaccines present authentic tertiary and quaternary whole virion structures, crucial for inducing protective antibody responses.
- Vaccines are produced in mosquito cell lines (C6/36, C7-10) to high titers and do not replicate in vertebrate hosts.
Conclusions:
- ISV-based chimeric vaccines represent a promising new strategy for whole virus vaccine development.
- Further research is needed to address challenges in adjuvanting, manufacturing, and ensuring long-term safety.
