NDLI: Lack of release of bound anthocyanins and phenolic acids from carrot plant cell walls and model composites during simulated gastric and small intestinal digestion

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Lack of release of bound anthocyanins and phenolic acids from carrot plant cell walls and model composites during simulated gastric and small intestinal digestion

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Food & Function Vol - 4 Issue - 5

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Lack of release of bound anthocyanins and phenolic acids from carrot plant cell walls and model composites during simulated gastric and small intestinal digestion

Content Provider	Royal Society of Chemistry (RSC)
Author	Netzel, Gabriele Day, Li Padayachee, Anneline Gidley, Michael J. Netzel, Michael Mikkelsen, Deirdre
Copyright Year	2013
Abstract	Separately, polyphenols and plant cell walls (PCW) are important contributors to the health benefits associated with fruits and vegetables. However, interactions with PCW which occur either during food preparation or mastication may affect bioaccessibility and hence bioavailability of polyphenols. Binding interactions between anthocyanins, phenolic acids (PAs) and PCW components, were evaluated using both a bacterial cellulose–pectin model system and a black carrot puree system. The majority of available polyphenols bound to PCW material with 60–70% of available anthocyanins and PAs respectively binding to black carrot puree PCW matter. Once bound, release of polyphenols using acidified methanol is low with only ∼20% of total anthocyanins to ∼30% of PAs being released. Less than 2% of bound polyphenol was released after in vitro gastric and small intestinal (S.I.) digestion for both the model system and the black carrot puree PCW matter. Confocal laser scanning microscopy shows localised binding of anthocyanins to PCW. Very similar patterns of binding for anthocyanins and PAs suggest that PAs form complexes with anthocyanins and polysaccharides. Time dependent changes in extractability with acidified methanol but not the total bound fraction suggests that initial non-specific deposition on cellulose surfaces is followed by rearrangement of the bound molecules. Minimal release of anthocyanins and PAs after simulated gastric and S.I. digestion indicates that polyphenols in fruits and vegetables which bind to the PCW will be transported to the colon where they would be expected to be released by the action of cell wall degrading bacteria.
Starting Page	906
Ending Page	916
Page Count	11
File Format	HTM / HTML PDF
ISSN	20426496
Volume Number	4
Issue Number	6
Journal	Food & Function
DOI	10.1039/c3fo60091b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	PCW Mastication Bioavailability Carrot Methanol Polyphenol Confocal microscopy Time Cellulose Large intestine Cell wall
Content Type	Text
Resource Type	Article
Subject	Medicine Food Science

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Lack of release of bound anthocyanins and phenolic acids from carrot plant cell walls and model composites during simulated gastric and small intestinal digestion

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