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Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA
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Controlling Payload Heterogeneity in Lipid Nanoparticles for RNA-Based Therapeutics.

Turash Haque Pial1, Sixuan Li2, Jinghan Lin1,3,4

  • 1Department of Materials Science and Engineering, Johns Hopkins University, Baltimore.

Biorxiv : the Preprint Server for Biology
|July 15, 2025
PubMed
Summary

Researchers optimized lipid nanoparticle (LNP) assembly for gene therapy by understanding payload distribution. Controlling turbulent mixing and salt concentration enhances RNA loading uniformity, leading to more effective and safer nucleic acid therapies.

Keywords:
Lipid nanoparticlesRNA encapsulationRNA therapeuticskinetic Monte Carlomolecular dynamics simulationsingle-particle characterization

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Area of Science:

  • Biotechnology
  • Nanomedicine
  • Molecular Biology

Background:

  • Lipid nanoparticles (LNPs) are key non-viral vectors for nucleic acid delivery.
  • Heterogeneous payload distribution in LNPs impacts therapeutic outcomes and safety.
  • Payload variability is a significant challenge for prolonged gene therapies.

Purpose of the Study:

  • To elucidate the step-by-step formation of RNA-loaded LNPs and identify sources of payload variability.
  • To develop strategies for improving LNP payload uniformity and therapeutic potential.

Main Methods:

  • Coarse-grained molecular dynamics simulations
  • Kinetic Monte Carlo simulations
  • Cylindrical illumination confocal spectroscopy (CICS)
  • Machine learning analysis

Main Results:

  • Payload heterogeneity originates from the interplay between RNA diffusion kinetics and lipid self-assembly dynamics.
  • Controlled turbulent mixing reduces payload variance without affecting LNP size.
  • Salt concentration and PEG-lipid content modulate RNA loading in a volume-dependent manner.

Conclusions:

  • Mechanistic insights into LNP self-assembly enable improved control over payload distribution.
  • Actionable design principles are provided for creating more uniform, potent, and safer LNP-based nucleic acid therapies.