VSV Genomic Clone Stability and Rescue Efficiency
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Solution Overview
Problem
There is a need for a vector that is genetically stable, easily modified, and efficiently propagated for expressing immunogens in recombinant vaccines.
Innovation Solution
A vesicular stomatitis virus (VSV) genomic clone is designed with nucleotide substitutions and amino acid coding changes to improve replicative fitness and genetic stability, along with a cloning plasmid that includes an extended T7 promoter, hammerhead ribozyme, and unique restriction endonuclease cleavage sites to facilitate efficient virus rescue and vaccine production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a VSV vector is used for vaccine production, then the virus can express foreign proteins and elicit immune responses, but the virus may be genetically unstable and difficult to propagate
Solution Approach 1:
The patent applies parameter changes by introducing specific nucleotide substitutions and amino acid coding changes to the VSV genome. These molecular parameter modifications improve replicative fitness and genetic stability while maintaining the virus's ability to express foreign proteins for vaccine production.
2Adaptability or versatility
If a VSV vector is modified to express immunogens, then vaccine efficacy is improved, but the complexity of virus rescue and propagation increases
Solution Approach 1:
The patent applies preliminary action by designing a cloning plasmid with pre-included strategic modifications before virus rescue. The plasmid contains extended T7 promoter, hammerhead ribozyme, and unique restriction endonuclease cleavage sites that are prepared in advance to facilitate efficient virus rescue and reduce operational complexity during vaccine production.
3Productivity
If a cloning plasmid is designed with strategic modifications, then virus rescue efficiency is improved, but the initial plasmid construction complexity increases
Solution Approach 1:
The patent applies preliminary action by incorporating all necessary strategic modifications into the cloning plasmid design phase. The plasmid includes pre-built extended T7 promoter, hammerhead ribozyme, and unique restriction sites that will facilitate efficient virus rescue, thereby reducing the complexity of subsequent viral manipulation steps.
Solution Approach 2:
The patent applies universality by designing a multi-functional cloning plasmid that serves multiple purposes: it provides the VSV genome backbone, contains the extended T7 promoter for efficient transcription, includes the hammerhead ribozyme for RNA processing, and provides unique restriction sites for cloning. This multi-functionality consolidates multiple components into a single plasmid, improving virus rescue efficiency while managing construction complexity.
Data Source
AI summary
The present relation relates to recombinant vesicular stomatitis virus for use as prophylactic and therapeutic vaccines as well as the preparation and purification of immunogenic compositions which are formulated into the vaccines of the present invention.