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Solvent-Free Microfluidic Fabrication of Antimicrobial Lipid Nanoparticles
Marta Ruano1, Tun Naw Sut2, Sue Woon Tan2
1Strathclyde Institute of Pharmacy & Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, U.K.
ACS Applied Bio Materials
|March 3, 2025
Summary
Researchers developed a novel solvent-free method to create mixed-composition antimicrobial lipid nanoparticles. Combining specific monoglycerides significantly boosted antibacterial potency against Staphylococcus aureus by disrupting bacterial membranes.
Area of Science:
- Biotechnology
- Materials Science
- Microbiology
Background:
- Antimicrobial lipid nanoparticles (MLNs) show promise against pathogens.
- Long-chain monoglycerides provide stability but lack antimicrobial activity.
- Short-chain monoglycerides are antimicrobial but form unstable nanoparticles.
Purpose of the Study:
- To develop stable, antimicrobial monoglyceride-based nanoparticles with enhanced efficacy.
- To overcome limitations of existing monoglyceride nanoparticle formulations.
- To investigate the impact of mixed monoglyceride compositions on antibacterial activity.
Main Methods:
- Solvent-free microfluidic fabrication of mixed-composition monoglyceride nanoparticles.
- Dynamic light scattering (DLS) and zeta potential for nanoparticle characterization.
- Antibacterial assays against Staphylococcus aureus.
- Biophysical techniques (QCM-D, EIS) to assess membrane disruption.
Main Results:
- Fabricated nanoparticles (250-350 nm) demonstrated high colloidal stability.
- Antibacterial activity was highly dependent on nanoparticle composition.
- Combinations including glycerol monobehenate or glycerol dibehenate boosted potency up to 270-fold.
- Effective compositions induced significant bacterial membrane disruption.
Conclusions:
- Combining specific monoglycerides in lipid nanoparticles significantly enhances antibacterial activity.
- Solvent-free microfluidics offers an efficient fabrication route.
- Membrane biophysics can guide the optimization of antimicrobial nanoparticle performance.
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