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…

Effects of laccase from Botrytis cinerea on the oxidative degradation kinetics of the five natural grape anthocyanins

Enzymatic browning[1] is an oxidation process that occurs in many foods that increases the brown colour[2]. This problem is especially harmful in the wine industry[3]. especially when the grapes are infected by grey rot since this fung release the oxidative enzyme laccase[4]. In the particular case of red wines, the presence of laccase implies the deterioration of the red colour and can even cause the precipitation of the coloring matter (oxidasic haze)[5].

Read More

Options to replace or reduce the sulphite content in Tannat red wines produced with minimal intervention

Several Uruguayan wineries have begun to produce wines with minimal intervention, to increase the sustainability of their vineyards and wines. These wines are characterized by the minimum intervention in the management of the vineyard, its harvest, vinification, conservation and aging1,2. Sulfur dioxide (SO2) is not used or is used in reduced doses, although chitosan can be substituted or supplemented1. The objective of this research is to evaluate SO2 reduction or replacement options adapted to the production of Tannat red wines with minimal intervention. Vinification of the Tannat grapes with autochthonous yeasts (LN) was carried out during the 2023 vintage.

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

High-throughput screening of physical-mechanical berry skin traits facilitates targeted selection of breeding material with resistance to Botrytis bunch rot and grape sunburn

The ongoing climate change implies an increasing mean air temperature, which is signified by weather extremes or sudden changes between drought and local heavy rainfalls. These changing conditions are especially challenging for the established grapevine varieties growing under cool climate conditions due to an increased risk for fungal diseases like downy mildew (DM) and Botrytis bunch rot (BBR) as well as for grape sunburn. To meet that demand, the scope of most grapevine breeding programs is the selection of mildew fungus-resistant and climatic adapted grapevines with balanced, healthy yield and outstanding wine quality.

Read More

Foliar application of urea improved the nitrogen composition of Chenin grapes

The nitrogen composition of the grapes directly affects the developments of alcoholic fermentation and influences the final aromatic composition of the wines. The aim of this study was to determine the effect and efficiency of foliar applications of urea on the nitrogen composition of grapes. This study was carried out during 2023 vintage and in the Chenin vineyard located in Estacion Experimental Mendoza (Argentina). Three urea concentrations 3, 6 and 9 Kg N/ha (C1, C2, and C3, respectively) and control (T) were applied in this vineyard at veraison.

Read More