mRNA Synthesis and Encapsulation in Ionizable Lipid Nanoparticles

Area of Science:

• Biotechnology
• Molecular Biology
• Nanomedicine

Background:

• Messenger RNA (mRNA) vaccines have gained prominence following their success in combating COVID-19.
• Advances in mRNA design and ionizable lipid nanoparticle (iLNP) delivery systems underpin this success.
• The potential of mRNA-iLNPs extends to cancer therapies, gene therapy, and vaccines for other infectious diseases.

Purpose of the Study:

• To describe reproducible protocols for producing mRNA-iLNPs using readily available reagents.
• To provide a benchmark formulation using DLin-MC3-DMA for screening mRNA designs and adapting to other lipids.
• To detail methods for the characterization and quality control of mRNA-iLNP formulations.

Main Methods:

• In vitro transcription with enzymatic capping and tailing for mRNA synthesis.
• Encapsulation of mRNA into iLNPs using the ionizable lipid DLin-MC3-DMA.
• Characterization techniques including mRNA concentration, encapsulation efficiency, particle size, and zeta potential measurement.

Main Results:

• Established protocols for synthesizing and encapsulating mRNA into iLNPs.
• Demonstrated adaptability of the formulation to different lipids.
• Presented a comprehensive quality control methodology for mRNA-iLNPs.

Conclusions:

• The described protocols facilitate the production of mRNA-iLNPs suitable for vaccine and therapeutic development.
• These methods enable further research into mRNA technology for diverse applications.
• Standardized production and quality control are crucial for advancing mRNA-based interventions.