Testing the effect of combining innovative extraction technologies on the biological activities of obtained β-glucan-enriched fractions from Lentinula edodes
Innovative technologies as ultrasound-assisted extraction (UAE) (550 W, 60% amplitude, 50 °C) or subcritical water extraction (SWE) (200 °C, 11.7 MPa) were more effective than hot water extractions to obtain β-glucan-enriched fractions from shiitake mushrooms. UAE required longer extraction time (60...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/193796 |
| Acceso en línea: | http://hdl.handle.net/10261/193796 |
| Access Level: | acceso abierto |
| Palabra clave: | β-Glucan Shiitake mushrooms Ultrasound-assisted extraction Subcritical water extraction Hypocholesterolemic activity Immunomodulatory activity |
| Sumario: | Innovative technologies as ultrasound-assisted extraction (UAE) (550 W, 60% amplitude, 50 °C) or subcritical water extraction (SWE) (200 °C, 11.7 MPa) were more effective than hot water extractions to obtain β-glucan-enriched fractions from shiitake mushrooms. UAE required longer extraction time (60 min) than SWE (15 min). Combination of UAE + SWE or pre-treatment of the raw material with supercritical CO2 (SFE) (40 °C, 35 MPa, 3 h) before both extractions yielded extracts containing larger β-glucan concentrations. Fluorimetric/colorimetric determinations indicated that obtained fractions contained (1 → 3)- and (1 → 3),(1 → 6)-β-glucans. NMR confirmed their presence as well as (1 → 3)-α-glucans and heteropolymers including mannose and galactose. SWE (15 min), SFE + SWE or UAE + SWE extracts showed larger glucose levels and lower mannose and galactose residues than the other extractions suggesting certain extraction specificity towards β-glucans. They also included more chitin-derivatives than UAE. The extracts obtained after combination of technologies partially retained their immunomodulatory properties but they showed high hypocholesterolemic activities according to in vitro studies. |
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