Cellulase-assisted release of secoisolariciresinol from extracts of flax (Linum usitatissimum) hulls and whole seeds |
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Authors: | Sullivan Renouard,Christophe Hano,Cyrielle Corbin,Ophé lie Fliniaux,Tatiana Lopez,Josiane Montguillon,Esmatullah Barakzoy,Franç ois Mesnard,Fré dé ric Lamblin,Eric Lainé |
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Affiliation: | 1. Laboratoire de Biologie des Ligneux et des Grandes Cultures UPRES EA 1207, Equipe Lignanes des Linacées, Antenne Scientifique Universitaire de Chartres, 21 rue de Loigny la Bataille, 28000 Chartres, France;2. Laboratoire de Phytotechnologie EA 3900 BioPI, Faculté de Pharmacie, Université de Picardie Jules Verne, 1 rue des Louvels, 80037 Amiens, France |
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Abstract: | Extraction of secoisolariciresinol from seed hulls and whole seeds of flax was improved using an enzymatic step with cellulase R10 from Trichoderma reesei that allowed better yield as compared to β-glucosidase. The cellulase assisted extraction process was further optimised for different parameters such as duration and concentration of hydromethanolic extraction, duration of alkaline hydrolysis, pH, duration and incubation temperature as well as enzyme concentration. Best results were obtained using a method including the following successive steps: 16 h of 70% hydromethanolic extraction, 6 h of 0.1 M sodium hydroxide hydrolysis followed by a 6 h incubation with 1 unit ml−1 of cellulase R10 in 0.1 M citrate–phosphate buffer pH 2.8 at 40 °C. Under these conditions, all forms of the main flax lignan were recovered as the aglycone form, i.e. secoisolariciresinol. Highest yields in secoisolariciresinol diglucoside (SDG) equivalent reached 7.72% of flaxseed hull (cv. Baladin) dry weight and 2.88% of whole seed (cv. Barbara) weight, thus allowing a significant improvement in comparison with published methods. |
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Keywords: | Cellulase Extraction Flaxseed Glucosidase Lignans Linum usitatissimum Secoisolariciresinol |
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