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Production of siRNA-Loaded Lipid Nanoparticles using a Microfluidic Device
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Three-dimensional, symmetrically assembled microfluidic device for lipid nanoparticle production.

Niko Kimura1, Masatoshi Maeki2,3, Kosuke Sasaki4

  • 1Graduate School of Chemical Sciences and Engineering, Hokkaido University Kita 13 Nishi 8, Kita-ku Sapporo 060-8628 Japan +81-11-706-6745 +81-11-706-6744.

RSC Advances
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Summary

A new 3D microfluidic device precisely controls lipid nanoparticle (LNP) size, enhancing drug delivery system performance. LNPs between 90-120 nm demonstrated superior gene silencing activity in vitro and in vivo.

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Drug Delivery Systems

Background:

  • Sub-100 nm lipid nanoparticles (LNPs) are crucial for drug delivery systems (DDSs), impacting biodistribution and gene silencing.
  • Conventional LNP preparation methods often yield a wide size distribution, limiting DDS efficacy.
  • Precise control over LNP size is essential for optimizing therapeutic outcomes.

Purpose of the Study:

  • To develop a novel microfluidic device for precise size control of large-sized LNPs.
  • To improve the size distribution of LNPs produced for enhanced DDS performance.
  • To investigate the relationship between LNP size distribution and gene silencing activity.

Main Methods:

  • Development of a three-dimensional, symmetrically assembled microfluidic device (3D-iLiNP).
  • Design and optimization of the 3D-iLiNP device using computational fluid dynamics simulations.
  • Evaluation of siRNA-loaded LNPs produced by the 3D-iLiNP device through in vitro and in vivo gene silencing experiments.

Main Results:

  • The 3D-iLiNP device successfully improved LNP size distribution, particularly for larger particles.
  • LNPs with sizes ranging from 90 to 120 nm exhibited significantly higher gene silencing activity.
  • Computational fluid dynamics simulations aided in the design and validation of the microfluidic device.

Conclusions:

  • The 3D-iLiNP device offers precise control over LNP size, leading to improved DDS performance.
  • Optimized LNP size (90-120 nm) is critical for maximizing gene silencing efficacy.
  • This technology holds promise for advancing targeted drug delivery and therapeutic applications.