Codon-Pair Deoptimization Attenuates FMDV in Swine but Fails to Induce Protective Immunity

Researchers recently evaluated the impact of codon-pair deoptimization on the foot-and-mouth disease virus (FMDV) serotype O in swine, finding that the process successfully attenuated the virus but failed to produce a protective immune response. The study, published in *Scientific Reports*, indicates that while the modified virus showed reduced virulence in infected animals, it did not provide the necessary immunity to protect swine against subsequent exposure to the wild-type virus.

The research team utilized codon-pair deoptimization—a method that alters the genetic sequence of a virus by using less common codon pairs—to weaken the FMDV strain. In the experimental trials, swine inoculated with the deoptimized virus exhibited significantly lower clinical symptoms and reduced viral replication compared to those exposed to the original strain. However, when the researchers challenged the vaccinated animals with the virulent wild-type virus, the subjects failed to develop sufficient neutralizing antibodies or cellular immunity to prevent infection. These results suggest that while genetic deoptimization effectively limits the virus’s ability to cause disease, the specific modifications used in this study do not trigger the biological pathways required for long-term protective immunity in swine.

Newsflash | Powered by GeneOnline AI

Source: GO-AI-ne1

For any suggestion and feedback, please contact us.

Date: July 16, 2026

Author

GOAI