Assessment of antioxidant, antidiabetic, antiobesity, and antiinflammatory properties of a Tannat winemaking by-product
Winemaking industry produces large amounts of by-products (grape pomace or marc) every year, making necessary a sustainable management of such waste. Among red wines, Tannat variety possesses a unique polyphenolic profile. Consequently, the study of the bioactive properties of its by-product and the...
| Autores: | , , , , |
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| Formato: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2019 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/193016 |
| Acesso em linha: | http://hdl.handle.net/10261/193016 |
| Access Level: | acceso abierto |
| Palavra-chave: | Dietary fiber Grape pomace Health promoting properties Phenolic compounds Tannat grape skin |
| Resumo: | Winemaking industry produces large amounts of by-products (grape pomace or marc) every year, making necessary a sustainable management of such waste. Among red wines, Tannat variety possesses a unique polyphenolic profile. Consequently, the study of the bioactive properties of its by-product and the extraction optimization of its bioactive compounds is of great interest to state its health promoting potential. In this study, different extraction processes were tested: maceration with ethanol (95%), ultrasound-assisted ethanolic extraction optimization with surface methodology, ultrasound-assisted aqueous extraction, and hydro-alcoholic-acid extraction (EHAA). Using this last extraction procedure, higher polyphenolic content (11.459 ± 1.048 g GAE/100 g of dry extract), monomeric anthocyanins (2.030 ± 0.085 g Cyd/100 g of dry extract), antioxidant capacity (0.474 ± 0.036 mg/mL for ABTS and 0.715 ± 0.063 µmol TE/mg of dry extract for ORAC-FL), α-glucosidase (IC50 888.5 ± 79.3 µg/mL), and pancreatic lipase inhibition capacity (IC50 2431.0 ± 79.9 µg/mL) were found on Tannat grape skin. Considering as a whole, these results may imply a great antidiabetic and antiobesity potential. Moreover, EHAA showed to have anti-inflammatory capacity (IC50 587 µg/mL) on RAW 264.7 cells. In summary, EHAA possesses great potential as a functional ingredient for prevention and/or treatment of chronic diseases. |
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