Interactions of (-)-epigallocatechin-3-gallate with model lipid membranes

Luka Šturm; Iztok Prislan; Rodrigo González-Ortega; Polona Mrak; Tina Snoj; Gregor Anderluh; Nataša Poklar Ulrih

doi:10.1016/j.bbamem.2022.183999

Interactions of (-)-epigallocatechin-3-gallate with model lipid membranes

Biochim Biophys Acta Biomembr. 2022 Oct 1;1864(10):183999. doi: 10.1016/j.bbamem.2022.183999. Epub 2022 Jul 9.

Authors

Luka Šturm¹, Iztok Prislan¹, Rodrigo González-Ortega², Polona Mrak³, Tina Snoj⁴, Gregor Anderluh⁴, Nataša Poklar Ulrih⁵

Affiliations

¹ Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia.
² Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; Faculty of Bioscience and Technology for Food Agriculture and Environment, University of Teramo, Via Renato Balzarini 1, 64100 Teramo, Italy.
³ Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia.
⁴ National Institute of Chemistry, Hajdrihova 19, POBox 660, 1001 Ljubljana, Slovenia.
⁵ Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia. Electronic address: natasa.poklar@bf.uni-lj.si.

PMID: 35820494
DOI: 10.1016/j.bbamem.2022.183999

Abstract

(-)-Epigallocatechin-3-gallate (EGCG) is a flavonoid known for its good antioxidant potential and health benefits. It is one of the most intriguing flavonoids, especially because of its specific interactions with model lipid membranes. It was noticed that EGCG might form EGCG rich domains/rafts at certain compositions of lipid membranes. In this article, we investigate whether EGCG forms EGCG rich domains when incorporated in 1,2-dipalmitoyl-sn-glycero-3-phosphatidylcholine (DPPC) liposomes. Our results show that EGCG decreases lipid ordering parameter in ordered membranes and increases it in the case of disordered ones. Also, incorporation of EGCG does not affect the zeta-potential and shape of the liposomes, but it can induce aggregation of liposomes. Our study also demonstrates that liposomes with incorporated EGCG are highly protected against UV-light induced oxidation.

Keywords: Aggregation; DSC; ITC; Lipid-order parameter; Liposome size/shape; Ultraviolet radiation.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Antioxidants
Catechin* / analogs & derivatives
Lipids
Liposomes*

Substances

Antioxidants
Lipids
Liposomes
Catechin
epigallocatechin gallate