Related Experiment Video
Updated: May 10, 2025
09:41
Formulating and Characterizing Lipid Nanoparticles for Gene Delivery using a Microfluidic Mixing Platform
Published on: February 25, 2021
22.6K
Microfluidic Optimization of PEI-Lipid Hybrid Nanoparticles for Efficient DNA Delivery and Transgene Expression
Mahboubeh Hosseini-Kharat1, Anthony Wignall1, Zelalem A Mekonnen2
1Clinical and Health Sciences, Centre for Pharmaceutical Innovation, University of South Australia, Adelaide, SA 5000, Australia.
Pharmaceutics
|April 26, 2025
Summary
Developing DNA-PEI-LNPs using microfluidics enhances gene delivery. Optimized formulations significantly improve DNA delivery and transgene expression, overcoming limitations of previous methods for better clinical translation.
Area of Science:
- Biotechnology
- Nanotechnology
- Gene Delivery
Background:
- Lipid nanoparticles (LNPs) and polyethyleneimine (PEI) are used for DNA delivery but face challenges in efficiency and toxicity.
- Developing novel delivery systems is crucial for advancing gene therapy and clinical applications.
Purpose of the Study:
- To develop and optimize DNA-PEI-LNPs for enhanced DNA delivery and transgene expression.
- To overcome the limitations of independent LNP and PEI delivery systems.
Main Methods:
- Evaluated three microfluidic mixing protocols for DNA-PEI-LNP preparation.
- Investigated the impact of varying DNA/PEI and DNA/lipid ratios on particle characteristics and delivery efficiency.
Main Results:
- Higher DNA/lipid ratios (1:40) resulted in smaller particles (136 nm) with increased cellular uptake (77%).
- A two-step preparation method with higher DNA/PEI ratios (1:3) significantly boosted transfection efficiency, achieving ~1.9 × 10^6 RLU for luciferase and ~23.8% GFP-positive cells.
Conclusions:
- Microfluidic preparation of DNA-PEI-LNPs offers a viable strategy for improved DNA delivery.
- Optimized formulation and preparation methods are key to enhancing DNA delivery efficiency and transgene expression for potential clinical use.
