Excretion of Avenanthramides, Phenolic Acids and their Major Metabolites Following Intake of Oat Bran.

Autor: Schär MY; Department of Food and Nutritional Sciences, School of Chemistry, Food and Pharmacy, University of Reading, Reading, UK., Corona G; Health Sciences Research Centre, University of Roehampton, London, UK., Soycan G; Department of Food and Nutritional Sciences, School of Chemistry, Food and Pharmacy, University of Reading, Reading, UK., Dine C; Health Sciences Research Centre, University of Roehampton, London, UK., Kristek A; Department of Food and Nutritional Sciences, School of Chemistry, Food and Pharmacy, University of Reading, Reading, UK., Alsharif SNS; Department of Food and Nutritional Sciences, School of Chemistry, Food and Pharmacy, University of Reading, Reading, UK., Behrends V; Health Sciences Research Centre, University of Roehampton, London, UK., Lovegrove A; Rothamsted Research, Harpenden, UK., Shewry PR; Rothamsted Research, Harpenden, UK., Spencer JPE; Department of Food and Nutritional Sciences, School of Chemistry, Food and Pharmacy, University of Reading, Reading, UK.
Jazyk: angličtina
Zdroj: Molecular nutrition & food research [Mol Nutr Food Res] 2018 Jan; Vol. 62 (2). Date of Electronic Publication: 2017 Dec 29.
DOI: 10.1002/mnfr.201700499
Abstrakt: Scope: Wholegrain has been associated with reduced chronic disease mortality, with oat intake particularly notable for lowering blood cholesterol and glycemia. To better understand the complex nutrient profile of oats, we studied urinary excretion of phenolic acids and avenanthramides after ingestion of oat bran in humans.
Methods and Results: After a 2-d (poly)phenol-low diet, seven healthy men provided urine 12 h before and 48 h after consuming 60 g oat bran (7.8 μmol avenanthramides, 139.2 μmol phenolic acids) or a phenolic-low (traces of phenolics) control in a crossover design. Analysis by ultra-high performance liquid chromatography (UPLC)-MS/MS showed that oat bran intake resulted in an elevation in urinary excretion of 30 phenolics relative to the control, suggesting that they are oat bran-derived. Mean excretion levels were elevated between 0-2 and 4-8 h, following oat bran intake, and amounted to a total of 33.7 ± 7.3 μmol total excretion (mean recovery: 22.9 ± 5.0%), relative to control. The predominant metabolites included: vanillic acid, 4- and 3-hydroxyhippuric acids, and sulfate-conjugates of benzoic and ferulic acids, which accounted collectively for two thirds of total excretion.
Conclusion: Oat bran phenolics follow a relatively rapid urinary excretion, with 30 metabolites excreted within 8 h of intake. These levels of excretion suggest that bound phenolics are, in part, rapidly released by the microbiota.
(© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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