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Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes
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A Time-Resolved In Situ SAXS Method for Real-Time Monitoring of Lipid Nanoparticles Assembly.

Ke-Meng Li1,2, Panqi Song2, Xiao-Peng He1

  • 1Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.

Membranes
|June 25, 2026
PubMed
Summary
This summary is machine-generated.

Time-resolved small-angle X-ray scattering (SAXS) reveals distinct self-assembly pathways for lipid nanoparticles (LNPs) and messenger RNA-loaded nanoparticles (mRNA-LNPs). This method tracks nanoparticle structural changes during microfluidic formulation and maturation.

Keywords:
lipid nanoparticlesnanostructureself-assemblytime-resolved small-angle X-ray scattering

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Biophysics

Background:

  • Lipid nanoparticles (LNPs) are key for nucleic acid delivery.
  • Traditional characterization methods limit understanding of LNP self-assembly dynamics.
  • Real-time monitoring of LNP structural evolution is crucial for nanomedicine development.

Purpose of the Study:

  • To establish a time-resolved (TR) in situ small-angle X-ray scattering (SAXS) method for monitoring LNP structural changes.
  • To investigate the distinct assembly mechanisms of empty LNPs versus messenger RNA-loaded LNPs (mRNA-LNPs).
  • To characterize nanoscale structural rearrangements during microfluidic formulation and maturation.

Main Methods:

  • Integration of a dual-channel microfluidic mixer with a SAXS measurement platform.
  • Real-time monitoring of scattering profiles for empty and mRNA-LNPs.
  • Analysis of structural evolution during microfluidic mixing, dilution, and maturation.

Main Results:

  • Distinct assembly pathways were observed for empty-LNPs and mRNA-LNPs.
  • Empty-LNPs showed gradual formation of periodic nanostructures.
  • mRNA-LNPs demonstrated rapid complexation and hierarchical assembly.
  • Nanoscale structural rearrangements during microfluidic dilution were successfully tracked.

Conclusions:

  • The TR-SAXS approach provides a robust framework for studying transient states in LNP formation.
  • This methodology elucidates molecular assembly mechanisms crucial for nanomedicine design.
  • The findings facilitate the rational design of advanced LNP-based drug delivery systems.