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Microfluidic assembly of lipid-based oligonucleotide nanoparticles.
1Department of Chemical and Biomolecular Engineering, The Ohio State University, 1012 Smith Lab, 174 West 18th Ave, Columbus, OH 43210, USA.
Anticancer Research
|April 19, 2011
Summary
Microfluidic technology offers a reproducible method for preparing oligonucleotide-loaded lipid nanoparticles (ON-LNPs) for therapeutic applications. This approach yields ON-LNPs with improved characteristics, particularly for antisense oligodeoxyribonucleotides.
Area of Science:
- Biotechnology
- Nanotechnology
- Drug Delivery
Background:
- Oligonucleotides (ONs) show therapeutic potential for various diseases.
- Reproducible laboratory-scale preparation of ON-loaded lipid nanoparticles (LNPs) is essential for therapeutic development.
Purpose of the Study:
- To establish a reproducible protocol for synthesizing ON-loaded LNPs using microfluidic (MF) technology.
- To evaluate the efficacy of MF synthesis for different types of oligonucleotides.
Main Methods:
- Utilized a 3-inlet microfluidic chip device for LNP synthesis at a lipid/ON ratio of 10/1 (w/w).
- Investigated flow rates from 50 to 1100 μl/min for synthesizing LNPs with antisense oligodeoxyribonucleotide (AS-ODN) and small-interfering RNA (siRNA).
- Compared MF synthesis with bulk mixing as a control.
Main Results:
- MF synthesis was highly effective for AS-ODN-loaded LNPs, with optimal flow rates between 100-200 μl/min.
- MF-synthesized ON-LNPs exhibited lower polydispersity.
- MF was less efficient for siRNA-loaded LNPs, potentially due to siRNA's double-stranded structure.
Conclusions:
- Microfluidic technology provides a simple, affordable, and reproducible method for producing ON-LNPs.
- MF is particularly suitable for AS-ODN-loaded LNPs, offering improved particle characteristics.
