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Göteborgs universitets publikationer

Metabolic transformations of dietary polyphenols: comparison between in vitro colonic and hepatic models and in vivo urinary metabolites.

Författare och institution:
Claudia Vetrani (-); Angela A Rivellese (-); Giovanni Annuzzi (-); Martin Adiels (Institutionen för medicin, avdelningen för molekylär och klinisk medicin & Wallenberglaboratoriet & Institutionen för matematiska vetenskaper, Chalmers/GU); Jan Borén (Institutionen för medicin, avdelningen för molekylär och klinisk medicin & Wallenberglaboratoriet); Ismo Mattila (-); Matej Orešič (-); Anna-Marja Aura (-)
Publicerad i:
The Journal of nutritional biochemistry, 33 s. 111-8
ISSN:
1873-4847
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2016
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
Studies on metabolism of polyphenols have revealed extensive transformations in the carbon backbone by colonic microbiota; however, the influence of microbial and hepatic transformations on human urinary metabolites has not been explored. Therefore, the aims of this study were (1) to compare the in vitro microbial phenolic metabolite profile of foods and beverages with that excreted in urine of subjects consuming the same foodstuff and (2) to explore the role of liver on postcolonic metabolism of polyphenols by using in vitro hepatic models. A 24-h urinary phenolic metabolite profile was evaluated in 72 subjects participating in an 8-week clinical trial during which they were randomly assigned to diets differing for polyphenol content. Polyphenol-rich foods and beverages used in the clinical trial were subjected to human fecal microbiota in the in vitro colon model. Metabolites from green tea, one of the main components of the polyphenol-rich diet, were incubated with primary hepatocytes to highlight hepatic conversion of polyphenols. The analyses were performed using targeted gas chromatography with mass spectrometer (GCxGC-TOFMS:colon model; GC-MS: urine and hepatocytes). A significant correlation was found between urinary and colonic metabolites with C1-C3 side chain (P=.040). However, considerably higher amounts of hippuric acid, 3-hydroxybenzoic acid and ferulic acid were detected in urine than in the colon model. The hepatic conversion showed additional amounts of these metabolites complementing the gap between in vitro colon model and the in vivo urinary excretion. Therefore, combining in vitro colon and hepatic models may better elucidate the metabolism of polyphenols from dietary exposure to urinary metabolites.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
MEDICIN OCH HÄLSOVETENSKAP ->
Medicinska grundvetenskaper ->
Cell- och molekylärbiologi
Postens nummer:
238096
Posten skapad:
2016-06-22 10:28
Posten ändrad:
2016-06-22 10:41

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