Study on the Persistence of a DNA Vaccine in Beef Muscles
Author Information
Author(s): Orság Petr, Kvardová Veronika, Raška Milan, Miller Andrew D, Ledvina Miroslav, Turánek Jaroslav
Primary Institution: Veterinary Research Institute, Department of Immunology, Brno, Czech Republic
Hypothesis
How long does the pDNA vaccine pVAX-Hsp60 TM814 persist in the muscles of beef cattle and mice after administration?
Conclusion
The study found that the pDNA vaccine pVAX-Hsp60 TM814 persists at ultra-low levels only at the injection site in beef cattle, with negligible amounts detectable in other tissues.
Supporting Evidence
- pDNAX was detectable in muscle tissue for up to 365 days post-injection.
- Residual pDNAX was found only at the injection site in beef cattle.
- Consumption of muscle from the injection site represents an undetectable intake of pDNA for consumers.
- Different formulations of the vaccine showed varying levels of persistence.
- Plasmid levels were significantly lower in distant muscle tissues and draining lymph nodes.
Takeaway
This study looked at how long a vaccine stays in the muscles of cows and mice. It found that after a year, only a tiny bit of the vaccine was left where it was injected.
Methodology
A quantitative real-time PCR (QRTPCR) method was developed to assess the persistence of the pDNA vaccine in muscle tissues of mice and beef cattle.
Limitations
The study primarily focused on the injection site and did not assess long-term effects on overall health or immune response.
Participant Demographics
The study involved 10 beef cattle bulls aged 3 months and BALB/c mice aged 5 to 8 weeks.
Digital Object Identifier (DOI)
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