terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Molecularly imprinted polymers: an innovative strategy for harvesting polyphenoles from grape seed extracts

Molecularly imprinted polymers: an innovative strategy for harvesting polyphenoles from grape seed extracts

Abstract

Multiple sclerosis (MS) is a multifactorial autoimmune disease associating demyelination and axonal degeneration developing in young adults and affecting 2–3 million people worldwide. Plant polyphenols endowed with many therapeutic benefits associated with anti-inflammatory and antioxidant properties represent highly interesting new potential therapeutic strategies. We recently showed the safety and high efficiency of grape seed extract (GSE), a complex mixture of polyphenolics compounds comprising notably flavonoids and proanthocyanidins, in an experimental autoimmune encephalomyelitis (EAE) mouse model of MS.

We currently investigate molecularly imprinted polymers (MIPs) as a dedicated tool to efficiently extract polyphenols from GSE with high dosage, controlled composition and improved bioavailability. The materials will be tailored such that either a selection of already known and potent polyphenols will be extracted, or more generically, that the majority of GSE containing polyphenols will be extracted in a rather untargeted approach. The same MIPs based on biodegradeable polymers will be used as innovative pharmaceutical formulations / drug delivery matrices packaging the polyphenols extracted from grape by-products, which serve as a resource of bioactive compounds with the distinct circular economic effect of reducing winemaking environmental impact.

Acknowledgements: We would like to thank the International Ambition Pack from La Région Auvergne-Rhône-Alpes for support of this project.

1)  A. Molinelli et al., Advanced Solid Phase Extraction Using Molecularly Imprinted Polymers for the Determination of Quercetin in Red Wine, Journal of Agricultural and Food Chemistry, 50 (7), 1804–1808 (2002), DOI: 10.1021/jf011213q

2)  S. Rajpal et al., An in silico predictive method to select multimonomer combinations for peptide imprinting, J. Mater. Chem. B 10, 6618-6626 (2022), DOI: https://doi.org/10.1039/D2TB00418F

3)  A. Kotyrba et al., Development of Silica Nanoparticle Supported Imprinted Polymers for Selective Lysozyme Recognition, Nanomaterials 11(12), 3287 (2021), DOI: https://doi.org/10.3390/nano11123287

DOI:

Publication date: October 5, 2023

Issue: ICGWS 2023

Type: Article

Authors

Boris Mizaikoff1,2*, Anika Kotyrba1, Mélina Begou2

1Ulm University, Institute of Analytical and Bioanalytical Chemistry, Ulm, Germany
2Hahn-Schickard, Ulm, Germany
3Université Clermont Auvergne, Department of Pharmacology, Clermont, France

Contact the author*

Keywords

molecularly imprinted polymers, polyphenols, grape seed extract, multiple sclerosis

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Wine racking in the winery and the use of inerting gases

The O2 uptake in the different winemaking processes is generally considered to be negative for the sensory characteristics of white and rosé wines. Wine racking is a critical point of O2 uptake, as the large surface area of the wine exposed during this operation and the inability to maintain an effective inert gas blanket over it.
The objective was to study O2 uptake during the racking of a model wine without using inert gases and to compare it with the purging of the destination tank with different inert gases.

Read More

Yeast mannoprotein characterization and their effect on Oenococcus oeni and malolactic fermentation

Mannoproteins are released at the end of alcoholic fermentation due to yeast autolysis [1]. It has been described a positive effect of these molecules on lactic acid bacteria growth [2]. The main objective of this work was the characterization of different mannoproteins extracted from active dry yeast (ADY) and the assessment of their effect on Oenococcus oeni and malolactic fermentation (MLF).

Read More

Characterization of a Sémillon clonal population: exploring genetic diversity, metabolomic profiles, and phenotypic variations

Sémillon is a cultivated grape variety known for contributing to dry and sweet white wine production. However, only seven approved clones have been officially recognized in France[1]. In this study, we aimed to characterize the genetic diversity and metabolomic profiles of a Sémillon clonal population, shedding light on the potential variations within this important grape variety.

Read More

Identification of a stable epi-allele associated with flower development and low bunch compactness in a somatic variant of Tempranillo Tinto

Grapevine cultivars are vegetatively propagated to preserve their varietal characteristics. However, spontaneous somatic variations that occur and are maintained during cycles of vegetative growth offer opportunities for the natural improvement of traditional grape cultivars. One advantageous trait for winegrowing is reduced bunch compactness, which decreases the susceptibility to pests and fungal diseases and favor an even berry ripening.

Read More

Preliminary study of the influence of ripening on the polysaccharide content of different red grape varieties

Grape skin has a barrier and protective function in grapes. Cell wall of grape skins is mainly composed of polysaccharides such as pectins, celulloses and hemicelluloses and structural proteins. Terroir, variety and changes during ripening can affect the content of polysaccharides in grapes. The aim of this study was to evaluate the content of polysaccharides (PS) in grapes along the ripening process. Three red grape varieties were studied: Garnacha (G), Tempranillo (T) and Prieto Picudo (PP).

Read More