Optimizing C14120-based LNPs for in vitro and in vivo mRNA delivery

Area of Science:

• Biotechnology
• Nanomedicine
• Molecular Biology

Background:

• Lipid nanoparticles (LNPs) are crucial for delivering RNA therapeutics.
• LNP chemical composition dictates delivery efficiency and targeting, varying between in vitro and in vivo settings.

Purpose of the Study:

• To systematically characterize novel C14120-based LNP formulations for mRNA delivery.
• To compare in vitro LNP performance with in vivo mRNA expression and biodistribution.
• To identify LNP compositions with organ-specific targeting capabilities.

Main Methods:

• Characterized 25 novel LNP formulations for in vitro mRNA delivery across four cell lines.
• Assessed in vivo mRNA expression and biodistribution using deep sequencing of DNA barcodes in a pooled LNP-mRNA library.
• Validated three selected LNP candidates for organ-specific targeting (lung, liver, spleen).

Main Results:

• Established correlations between LNP lipid composition, particle size, and in vitro mRNA transfection efficiency.
• Identified LNP formulations exhibiting organ-specific targeting properties in vivo.
• Confirmed high lung-targeting specificity for one candidate, lower liver-targeting specificity, and inconclusive spleen-targeting results.

Conclusions:

• Novel LNP formulations show promise for targeted mRNA delivery.
• LNP composition is key to achieving specific in vitro and in vivo organ targeting.
• Findings pave the way for advanced RNA therapeutic delivery systems.