Biomimetic noncationic lipid nanoparticles for mRNA delivery

Area of Science:

• Biotechnology
• Nanomedicine
• Drug Delivery Systems

Background:

• Traditional messenger RNA (mRNA) delivery systems often use cationic lipids, leading to inflammatory and cytotoxic effects due to high charge density.
• Developing safe and efficient mRNA delivery vehicles that avoid cationic properties is a significant challenge in the field.

Purpose of the Study:

• To create a novel noncationic thiourea lipid nanoparticle (NC-TNP) system for mRNA delivery.
• To evaluate the safety, efficiency, and targeting capabilities of NC-TNPs compared to conventional lipid nanoparticles (LNPs).

Main Methods:

• Synthesized noncationic thiourea lipids nanoparticles (NC-TNP) utilizing hydrogen bond interactions for mRNA complexation.
• Assessed inflammatory and cytotoxicity profiles of NC-TNPs.
• Investigated intracellular trafficking and gene transfection efficiency in vitro and in vivo.
• Evaluated spleen-targeting ability and immune response induction.

Main Results:

• NC-TNPs demonstrated negligible inflammatory and cytotoxicity, offering a safer alternative to cationic carriers.
• These nanoparticles effectively escaped cellular recycling pathways, enhancing intracellular delivery.
• NC-TNP-encapsulated mRNA exhibited superior gene transfection efficiency compared to traditional mRNA-LNP formulations.
• NC-TNPs showed significant spleen targeting, leading to higher antigen expression and robust immune responses.

Conclusions:

• Noncationic thiourea lipid nanoparticles represent a disruptive technology for safe and efficient mRNA delivery.
• The simple preparation and spleen-targeting ability of NC-TNPs offer potential for developing advanced vaccines and immunotherapies.