Genetic engineering Quote by Michael G Cordingley

““The results of the studies opened up a whole new avenue of research into live-attenuated vaccines: synthetic attenuated virus engineering (SAVE). A virus was created with 631 synonymous mutations in its P1 coding sequence, designed to bias it toward the use of codons that rarely preferred in human cells. The result was a highly attenuated virus that caused no disease in an animal model of virus infection, and like the naturally evolved live-attenuated polioviruses developed by Sabin, it proved to be a highly effective vaccine. Unlike Sabin's strains, however, the multiplicity of genetic changes contributing to attenuation is expected to render the phenotype far more stable and resilient to reversion in vivo. This technology could prove extremely useful in the development of safe and stable attenuated viruses that raise an immune response almost identical to that against the natural infection. There are now many examples of the genetic engineering of synthetic attenuated virus vaccines; most notably it has been employed to create a live-attenuated vaccine against a strain of human influenza, a virus that, unlike poliovirus or smallpox virus, we cannot hope to eradicate and for which vaccination remains the lynchpin of disease management.””

— Michael G Cordingley