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…

How are canned wine drinkers perceived? An investigation involving Swiss nationals and different scenarios of outdoor leisure activities

This study examines how people who consume wine in cans are perceived in terms of their basic personality characteristics, helps understand the role of cultural background on people’s perception, and verify the role played by the consumption context on the perception. Our hypothesis is that prejudice and negative attitudes towards wine in cans might exert a negative effect on the evaluation of people who consume canned wine. To evaluate this hypothesis, the consumption of wine in cans was evoked in four different contexts of use during outdoor leisure activity (beach resort, ski resort, desert safari, and party). In order to examine the effect of culture on subject’s response we use participants from Switzerland, a country where three different cultures, associated with three different languages, cohabit.

Unveiling a hidden link: does time hold the key to altered spectral signatures of grapevines under drought?

Remote sensing technology captures spectral data beyond the visible range, making it useful for monitoring plant stress. Vis-NIR (Visible-Near Infrared) spectroscopy (400-1000 nm) is commonly used to indirectly assess plant status during drought. One example is the widespread use of normalized difference vegetation index (NDVI) that is strongly linked to green biomass. However, a knowledge gap exists regarding the applicability of this method to all the drought conditions and if it is a direct correlation to the water status of the plant.

Vertical cordon training system enhances yield and delays ripening in cv. Maturana Blanca

The growing interest in minority grape varieties is due to their potential for adaptation to global warming and their oenological capabilities. However, the cultivation of these varieties has often been limited due to their low economic efficiency. One such example is Maturana Blanca, a recently recovered and authorized minority grape variety in the DOCa Rioja region, known for its remarkable oenological potential but low productivity. This study aimed to increase the yield of Maturana Blanca by implementing the vertical cordon training system, which allowed for a higher number of buds per plant and an increased cluster count per vine.

Agronomic behavior of three grape varieties in different planting density and irrigation treatments

In the O Ribeiro Denomination of Origin, there is a winemaking tradition of growing vines under a high-density plantation framework (8,920 vines/ha) and maintaining its vegetative cycle under rainfed conditions.
Currently, viticulture is advancing to plantation frames in which the density is considered medium (5,555 vines/ha), thus allowing mechanized work to be carried out for vineyard management operations. Although, the application of irrigation applied proportionally to the needs of the vegetative cycle of the vine, is a factor that increasingly helps a good development of the vine compared to the summer period, with increasingly uncertain weather forecasts.

Qualitative and productive characterization of a minority variety: ‘Branco lexítimo’ in DO Ribeira Sacra (Spain)

The actual climate changes, together with the strong regulation of the European Union and Spanish government, in search of sustainable viticulture, have forced the recovery of minority varieties, expanding the range of grape varieties, as well as the possible development of wines with unique profiles. In the Ribeira Sacra DO (Spain), a comparative study of the agronomic and qualitative behavior of the ‘Branco lexítimo’ variety has been carried out, compared to the majority white variety in the DO: ‘Godello’, located in the same study plot, with identic soil and climatic conditions. The study contemplated the analysis of phenology and leaf water potential, as well as the productive results and the analysis of the must quality, during four seasons: 2018 – 2021.