Ultrasound-assisted extraction and bioaccessibility of saponins from edible seeds: quinoa, lentil, fenugreek, soybean and lupin
EntityUAM. Departamento de Química Física Aplicada
10.1016/j.foodres.2018.04.058Food Research International 109 (2018): 440-447
ISSN0963-9969 (print); 1873-7145 (online)
Funded byThis work was supported by the Ministerio de Economía y Competitividad, Spain (AGL2016-76736-C3-1-R) and the Community ofMadrid, Spain (ALIBIRD-CM S2013/ABI-2728). Joaquín Navarro del Hierro thanks the Ministerio de Educación, Cultura y Deporte forfunding his research with a FPU predoctoral contract (FPU 15/04236).Teresa Herrera thanks the Community of Madrid for her contract (Fondo Social Europeo, Programa Operativo de Empleo Juvenil eIniciativa de Empleo Juvenil YEI)
ProjectGobierno de España. AGL2016-76736-C3-1-R; Comunidad de Madrid. S2013/ABI-2728/ALIBIRD
SubjectsBioaccessibility; Edible seeds; Gastrointestinal digestion; Legumes; Lipids; Polyphenols; Saponins; Ultrasound-assisted extraction; Ciencia y Tecnología de Alimentos; Química
NoteThis Accepted Manuscript is available for reuse under a CC BY-NC-ND licence after the 12 month embargo period
Rights© 2018 Elsevier Ltd
Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
The efficient production of saponin-rich extracts is of increasing interest due to the bioactive properties that have being demonstrated for these compounds. However, saponins have a poor bioavailability. In this respect, the knowledge about the bioaccessibility of saponins as a first step before bioavailability has been scarcely explored. In this study, the production of ultrasound-assisted extracts of saponins from edible seeds (quinoa, soybean, red lentil, fenugreek and lupin) was carried out with ethanol, ethanol:water or water. Extraction yield, total saponin (TSC), fat and total phenolics content (TPC) were determined. Then, the bioaccessibility of saponins after the in vitro gastrointestinal digestion of the extracts was determined and the effect of TPC and fat in the extracts on bioaccessibility was evaluated. The highest saponin-rich extracts were obtained by ethanol, being fenugreek and red lentil the richest extracts (12% and 10%, respectively). Saponins from ethanol:water extracts displayed variable bioaccessibility (from 13% for fenugreek to 83% for lentil), but a bioaccessibility closer to 100% was reached for all ethanol extracts. Correlation studies showed that TPC of the extracts negatively affected the bioaccessibility of saponins, whereas fat of the extracts enhanced this parameter. As summary, ultrasound-assisted extraction is shown as an efficient method for obtaining saponin-rich extracts from edible seeds, being ethanol the most advantageous solvent due to the richness of saponins and the successful bioaccessibility from these extracts, likely caused by the co-extracted fat with ethanol. Regardless of the extracts, phenolic compounds or fat may hinder or enhance the bioaccessibility of saponins, respectively. Additionally, an adequate balance between saponins to lipids has shown to be relevant on such an effect
Google Scholar:Navarro del Hierro, Joaquín - Herrera, Teresa - García-Risco, Mónica R. - Fornari, Tiziana - Reglero, Guillermo - Martin, Diana
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