Experimental Modeling of Flavonoid-Biomembrane Interactions
Didem Sanver1, Brent S Murray, Amin Sadeghpour
1Department of Food Engineering, Necmettin Erbakan University , Koycegiz Kampusu, 420701 Konya, Turkey.
Langmuir : the ACS Journal of Surfaces and Colloids
|December 14, 2016
Summary
Flavonoids interact with cell membranes, altering their properties. Planar flavonoids significantly change membrane thickness and fluctuations, impacting therapeutic potential.
Area of Science:
- Biochemistry
- Biophysics
- Materials Science
Background:
- Flavonoids interact with lipid bilayers, affecting membrane properties and therapeutic efficacy.
- Understanding these interactions is crucial for drug development and understanding biological processes.
Purpose of the Study:
- To investigate the structure-dependent interactions of flavonoids with phospholipid monolayers.
- To characterize the effects of specific flavonoids (quercetin, rutin, tiliroside) on membrane properties.
- To explore the structure-activity relationship (SAR) of flavonoids in biomimetic membrane models.
Main Methods:
- Rapid cyclic voltammetry (RCV) on mercury film electrodes.
- Langmuir monolayers, Brewster angle microscopy (BAM), and small-angle X-ray scattering (SAXS).
- Utilizing DOPC (1,2-dioleoyl-sn-glycero-3-phosphocholine) lipid models.
Main Results:
- Planar flavonoids induced more significant membrane alterations than nonplanar ones.
- Quercetin and tiliroside stabilized lipid monolayers, while rutin disrupted them.
- All tested flavonoids reduced bilayer thickness and increased membrane fluctuations.
- Tiliroside's effects on biomimetic membranes were investigated for the first time.
Conclusions:
- Flavonoid structure dictates membrane interaction and perturbation extent.
- These membrane modifications, occurring at the lipid/water interface, have implications for flavonoid therapeutic activity.
- Lipid monolayers provide a valuable platform for studying flavonoid-membrane interactions and SAR.
