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Updated: Apr 29, 2026
10:15
Atomic Force Microscopy Imaging and Force Spectroscopy of Supported Lipid Bilayers
Published on: July 22, 2015
14.5K
Perfluorooctanoic acid rigidifies a model lipid membrane.
1Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, Berlin, Germany and Reactor Institute Delft, Delft University of Technology, Delft, The Netherlands.
Summary
Perfluorooctanoic acid stiffens lipid bilayers, similar to cholesterol. This study used neutron spin-echo to observe membrane undulations and found a condensing effect from the perfluorinated compound.
Area of Science:
- Biophysics
- Materials Science
- Membrane Biophysics
Background:
- Lipid bilayers are fundamental to cell membranes.
- Perfluorinated compounds can alter membrane properties.
- Understanding these interactions is crucial for various applications.
Purpose of the Study:
- To investigate the effect of perfluorooctanoic acid on lipid bilayer properties.
- To quantify changes in local lipid bilayer undulations.
- To compare the effect of perfluorooctanoic acid with cholesterol.
Main Methods:
- Dynamic light scattering.
- Neutron spin-echo (NSE) spectroscopy.
- Studying vesicles of 1,2-dimyristoyl-sn-glycero-3-phosphatidylcholine.
Main Results:
- Perfluorooctanoic acid was observed to stiffen the lipid bilayer.
- Neutron spin-echo revealed changes in membrane undulations on time scales up to 200 ns.
- The effect was comparable to that induced by cholesterol.
Conclusions:
- Perfluorooctanoic acid acts as a condensing agent on lipid membranes.
- This condensing effect leads to increased lipid bilayer stiffness.
- The findings provide insights into the interaction of fluorinated compounds with biological membranes.
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