Impact of fermentable fibres on the colonic microbiota metabolism of dietary polyphenols rutin and quercetin

Mansoorian, B., Combet Aspray, E. , Garcia, A. and Edwards, C. (2019) Impact of fermentable fibres on the colonic microbiota metabolism of dietary polyphenols rutin and quercetin. International Journal of Environmental Research and Public Health, 16(2), 292. (doi: 10.3390/ijerph16020292) (PMID:30669671) (PMCID:PMC6352267)

Abstract

Dietary fibre and polyphenols are both metabolised to short-chain fatty acids (SCFAs) and phenolic acids (PA) by the colonic microbiota. These may alter microbiota growth/diversity, but their interaction is not understood. Interactions between rutin and raftiline, ispaghula or pectin were investigated in human faecal batch cultures (healthy participants; 19–33 years, 4 males, 6 females, BMI 18.4–27.4) after a low (poly)phenol diet three days prior to study. Phenolic acids were measured by gas chromatography-mass spectrometry and SCFAs by gas chromatography-flame ionisation after 2, 4, 6, and 24 h. Rutin fermentation produced Phenyl acetic acid (PAA), 4-Hydroxy benzoic acid (4-OHBA), 3-Hydroxy phenyl acetic acid (3-OHPAA), 4-Hydroxy phenyl acetic acid (4-OHPAA), 3,4-Dihydroxy phenyl acetic acid (3,4-diOHPAA), 3-Hydroxy phenyl propionic acid (3-OHPPA), and 4-Hydroxy phenyl propionic acid (4-OHPPA). 3,4-DiOHPAA and 3-OHPAA were predominant at 6 h (1.9 ± 1.8 µg/mL, 2.9 ± 2.5 µg/mL, and 0.05 ± 0.0 µg/mL, respectively) and 24 h (5.5 ± 3.3 µg/mL, 3.1 ± 4.2 µg/mL, and 1.2 ± 1.6 µg/mL). Production of all PA except 3-OHPPA and 4-OHPPA was reduced by at least one fibre. Inhibition of PA was highest for rutin (8-fold, p < 0.01), then pectin (5-fold, p < 0.01), and ispaghula (2-fold, p = 0.03). Neither rutin nor quercetin had a detectable impact on SCFA production. These interactions should be considered when assessing dietary polyphenols and potential health benefits.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Edwards, Professor Christine and Mansoorian, Dr Bahareh and Combet Aspray, Professor Emilie and Garcia, Dr Ada
• Authors: Mansoorian, B., Combet Aspray, E., Garcia, A., and Edwards, C.
• College/School: College of Medical Veterinary and Life Sciences > School of Cardiovascular & Metabolic Health; College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
• Journal Name: International Journal of Environmental Research and Public Health
• Publisher: MDPI
• ISSN: 1661-7827
• ISSN (Online): 1660-4601
• Published Online: 21 January 2019
• Copyright Holders: Copyright © 2019 The Authors
• First Published: First published in International Journal of Environmental Research and Public Health 16(2):292
• Publisher Policy: Reproduced under a Creative Commons License