Resveratrol Interaction with Lipid Bilayers: A Synchrotron X-ray Scattering Study.
Ana Rute Neves1, Cláudia Nunes1, Heinz Amenitsch2
1UCIBIO, REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto , Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
Langmuir : the ACS Journal of Surfaces and Colloids
|October 28, 2016
Summary
Resveratrol influences cell membrane structure by promoting lipid domain formation, potentially explaining its therapeutic benefits. This polyphenol organizes lipid rafts, impacting protein localization and cellular signaling pathways.
Area of Science:
- Biochemistry
- Biophysics
- Molecular Biology
Background:
- Resveratrol, a polyphenol, exhibits various health benefits like antioxidant and anti-inflammatory actions.
- Its therapeutic effects may stem from interactions with biological membranes.
- Understanding these interactions is crucial for elucidating resveratrol's mechanisms of action.
Purpose of the Study:
- To investigate how resveratrol affects the structural organization of lipid bilayers.
- To determine if resveratrol-induced membrane modifications contribute to its known health benefits.
- To explore the role of resveratrol in modulating lipid domains and protein localization.
Main Methods:
- Utilized small- and wide-angle X-ray scattering (SAXS and WAXS) at a synchrotron.
- Employed membrane mimetic systems with varying ratios of egg l-α-phosphatidylcholine (EPC), cholesterol (CHOL), and sphingomyelin (SM).
- Analyzed the influence of resveratrol on lipid order and bilayer structure.
Main Results:
- Resveratrol induced phase separation and promoted the formation of lipid domains in different lipid bilayer compositions.
- Observed structural organization in membranes due to resveratrol's effect on lipid packing.
- Demonstrated that resveratrol organizes lipid rafts, influencing membrane structure.
Conclusions:
- Resveratrol controls lipid packing in bilayers by inducing lipid raft organization.
- The formation of these lipid domains is critical for modulating transmembrane protein and enzyme activity.
- These membrane-modulating effects provide a potential explanation for resveratrol's therapeutic actions.
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