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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
Published on: May 15, 2017
Main phase transition of hydroperoxidized SOPC bilayers
Eulalie Lafarge1, Sifre van Teeffelen2, André P Schroder3
1Institut Charles Sadron, CNRS UPR22 & Université de Strasbourg, Strasbourg 67000, France.
The Journal of Chemical Physics
|May 11, 2026
Summary
Oxidative modification of unsaturated phospholipids like SOPC alters membrane structure. This study reveals how lipid hydroperoxidation impacts phospholipid phase transitions and membrane organization.
Area of Science:
- Biophysics
- Membrane Biology
- Lipid Chemistry
Background:
- Lipid hydroperoxidation alters membrane biophysical properties.
- Its precise effect on unsaturated phospholipid phase transitions is not fully understood.
Purpose of the Study:
- To investigate the influence of hydroperoxidation on the phase behavior of 1-stearoyl-2-oleoyl-sn-glycero-3-phosphocholine (SOPC).
- To understand how oxidative modifications affect membrane organization.
Main Methods:
- Differential scanning calorimetry.
- Solvatochromic probe A10 band shift.
- Laurdan generalized polarization fluorescence.
Main Results:
- Hydroperoxidation of SOPC (SOPC-OOH) perturbed membrane thermodynamics.
- A complex phase-transition landscape emerged due to acyl-chain ordering and -OOH group distribution.
- Lipid peroxidation significantly impacts membrane organization.
Conclusions:
- Membrane lipid phase behavior is highly sensitive to oxidative modifications.
- Lipid peroxidation plays a crucial role in modulating membrane organization in biological and biomimetic systems.
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