Algorithm for optimized mRNA design improves stability and immunogenicity
【Abstract】
Messenger RNA (mRNA) vaccines are being used to combat the spread of COVID-19(refs. 1–3), but they still exhibit critical limitations caused by mRNA instability and degradation, which are major obstacles for the storage, distribution and efficacy of the vaccine products4. Increasing secondary structure lengthens mRNA half-life, which, together with optimal codons, improves protein expression5. Therefore, a principled mRNA design algorithm must optimize both structural stability and codon usage. However, owing to synonymous codons, the mRNA design space is prohibitively large—for example, there are around 2.4 × 10632 candidate mRNA sequences for the SARS-CoV-2 spike protein. This poses insurmountable computational challenges. Here we provide a simple and unexpected solution using the classical concept of lattice parsing in computational linguistics, where finding the optimal mRNA sequence is analogous to identifying the most likely sentence among similar-sounding alternatives6. Our algorithm LinearDesign finds an optimal mRNA design for the spike protein in just 11 minutes, and can concurrently optimize stability and codon usage. LinearDesign substantially improves mRNA half-life and protein expression, and profoundly increases antibody titre by up to 128 times in mice compared to the codon-optimization benchmark on mRNA vaccines for COVID-19 and varicella-zoster virus. This result reveals the great potential of principled mRNA design and enables the exploration of previously unreachable but highly stable and efficient designs.
Our work is a timely tool for vaccines and other mRNA-based medicines encoding therapeutic proteins such as monoclonal antibodies and anti-cancer drugs7,8.
BiOptic Qsep Series has been named in《Nature 621》journal with the new application of combining AI Algorithm with mRNA design.
COVID-19 pandemic brings more attention to mRNA vaccine and medicine development, and is now widely used in R&D of medical-related industries.
Qsep Series plays the most important role in the R&D of mRNA vaccines and medicines, which is to check the RNA integrity. The easy-to-use system with high performance in resolution, sensitivity, and reproducibility makes it the most powerful tool in your lab.
BiOptic has successfully supported an amount of institutions and companies in establishing a standard protocol for RNA integrity check. Please do not hesitate to contact our team.
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