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 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.
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Springer Nature
2019
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| Subjects: | Dietary fiber, Grape pomace, Health promoting properties, Phenolic compounds, Tannat grape skin, |
| Online Access: | http://hdl.handle.net/10261/193016 http://dx.doi.org/10.13039/501100003339 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 |
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| Summary: | 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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