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Interaction of nanoparticles with lipid membranes: a multiscale perspective
Costanza Montis1, Daniele Maiolo, Ivano Alessandri
1Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy. montis@csgi.unifi.it debora.berti@unifi.it.
Nanoscale
|May 9, 2014
Summary
Gold nanoparticles interact differently with lipid bilayers based on their surface coating. Understanding these nanoparticle-membrane interactions requires considering multiple length scales for accurate analysis.
Area of Science:
- Biophysics
- Nanotechnology
- Materials Science
Background:
- Lipid bilayers are fundamental biological membranes.
- Nanoparticles interact with biological systems, influencing membrane properties.
- Surface coatings on nanoparticles alter their interactions with membranes.
Purpose of the Study:
- To investigate the impact of gold nanosphere surface coatings on freestanding lipid bilayers.
- To analyze how citrate and protein corona coatings affect bilayer morphology, permeability, and fluidity.
- To determine the scale-dependent nature of nanoparticle-lipid membrane interactions.
Main Methods:
- Utilizing freestanding lipid bilayers.
- Challenging bilayers with 15 nm gold nanospheres.
- Comparing nanospheres coated with citrate versus those passivated by a protein corona.
- Observing effects across colloidal to molecular length scales.
Main Results:
- Significant differences and similarities in bilayer response were observed based on nanosphere coating.
- The observed effects varied depending on the length scale of observation.
- Both morphology, permeability, and fluidity of the lipid bilayers were affected.
Conclusions:
- Nanoparticle-lipid membrane interactions are complex and exhibit multiscale characteristics.
- The surface chemistry of nanoparticles (e.g., citrate vs. protein corona) critically influences their interaction with lipid bilayers.
- A multiscale approach is necessary for a comprehensive understanding of nanoparticle-membrane interactions.
