Metabolomics of pigmented rice coproducts applying conventional or deep eutectic extraction solvents reveal a potential antioxidant source for human nutrition

Barros Santos Millena, Barouh Nathalie, Durand Erwann, Baréa Bruno, Robert Mélina, Micard Valérie, Lullien-Pellerin Valérie, Villeneuve Pierre, Cameron Luiz Claudio, Ryan Elizabeth P., Larraz Ferreira Mariana Simões, Bourlieu-Lacanal Claire. 2021. Metabolomics of pigmented rice coproducts applying conventional or deep eutectic extraction solvents reveal a potential antioxidant source for human nutrition. Metabolites, 11 (2):110, 26 p.

Quartile : Q2, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY

Résumé : Rice bran (RB) corresponds to the outer layers of whole grain rice and contains several phenolic compounds (PCs) that make it an interesting functional food ingredient. PC richness is enhanced in pigmented RB varieties and requires effective ways of extraction of these compounds. Therefore, we investigated conventional and deep eutectic solvents (DES) extraction methods to recover a wide array of PCs from red and black RB. The RB were extracted with ethanol/water (60:40, v/v) and two DES (choline chloride/1.2-propanediol/water, 1:1:1 and choline chloride/lactic acid, 1:10, mole ratios), based on Generally Recognized as Safe (GRAS) components. Besides the quantification of the most typical phenolic acids of cereals, nontargeted metabolomic approaches were applied to PCs profiling in the extracts. Globally, metabolomics revealed 89 PCs belonging to flavonoids (52%), phenolic acids (33%), other polyphenols (8%), lignans (6%) and stilbenes (1%) classes. All extracts, whatever the solvents, were highly concentrated in the main phenolic acids found in cereals (37–66 mg/100 g in black RB extracts vs. 6–20 mg/100 g in red RB extracts). However, the PC profile was highly dependent on the extraction solvent and specific PCs were extracted using the acidic DES. The PC-enriched DES extracts demonstrated interesting DPPH scavenging activity, which makes them candidates for novel antioxidant formulations.

Mots-clés Agrovoc : Oryza sativa, son de riz, polyphénol, antioxydant, nutrition humaine, extraction par solvant, métabolomique

Mots-clés complémentaires : solvant eutectique profond

Mots-clés libres : Rice, Polyphenols, Antioxidants

Classification Agris : Q02 - Traitement et conservation des produits alimentaires
S01 - Nutrition humaine - Considérations générales

Champ stratégique Cirad : CTS 3 (2019-) - Systèmes alimentaires

Auteurs et affiliations

• Barros Santos Millena, CIRAD-PERSYST-UMR IATE (FRA)
• Barouh Nathalie, CIRAD-PERSYST-UMR IATE (FRA) ORCID: 0000-0001-6956-1349
• Durand Erwann, CIRAD-PERSYST-UMR IATE (THA) ORCID: 0000-0002-0306-8081
• Baréa Bruno, CIRAD-PERSYST-UMR IATE (FRA) ORCID: 0009-0007-5164-1632
• Robert Mélina, Université de Montpellier (FRA)
• Micard Valérie, Université de Montpellier (FRA)
• Lullien-Pellerin Valérie, INRAE (FRA)
• Villeneuve Pierre, CIRAD-PERSYST-UMR IATE (FRA) ORCID: 0000-0003-1685-1494
• Cameron Luiz Claudio, UNIRIO (BRA)
• Ryan Elizabeth P., Colorado State University (USA)
• Larraz Ferreira Mariana Simões, UNIRIO (BRA) - auteur correspondant
• Bourlieu-Lacanal Claire, CIRAD-PERSYST-UMR Qualisud (FRA) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/597580/)

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