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Self-amplifying RNAs with modified building blocks produce strong protein levels and immune response in living organisms
Updated
Abstract
Synthetic (saRNA) incorporating noncanonical nucleotides like (m5C) and (m5U) demonstrates sustained gene expression.
- saRNA can achieve higher and more sustained expression compared to standard messenger RNA in therapeutic applications.
- The inclusion of modified nucleotides in synthetic mRNA enhances RNA stability, reduces immune activation, and improves gene expression.
- For the first time, noncanonical nucleotides m5C and m5U have been shown to be compatible with a specific replicon for protein translation.
- saRNA utilizing m5C or m5U was found to mediate sustained expression of the luciferase reporter gene.
- saRNA incorporating m5U resulted in more prolonged gene expression than those using m5C.
- Modified saRNA induced distinct antigen-specific immune responses when encoding the model antigen ovalbumin.
Simplified
Key numbers
4–5×
Increase in luciferase expression
Measured at Days 14 and 17 post-injection.
10×
IgG titer increase
Observed between Days 21 and 28 post-vaccination.