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Type: Journal article
Title: Interaction of astringent grape seed procyanidins with oral epithelial cells
Author: Payne, C.
Bowyer, P.
Herderich, M.
Bastian, S.
Citation: Food Chemistry, 2009; 115(2):551-557
Publisher: Elsevier Sci Ltd
Issue Date: 2009
ISSN: 0308-8146
Statement of
Caroline Payne, Paul K. Bowyer, Markus Herderich, Susan E.P. Bastian
Abstract: Mechanisms underlying astringency perception are not clearly understood. It has been suggested that oral epithelial cells play a role. A cell-based bioassay has been developed to define the interactions of astringent grape seed procyanidins with oral epithelial cells. Procyanidins are visualised and quantified after reaction with 4-(dimethylamino)cinnamaldehyde. This assay has demonstrated, conclusively, that astringent procyanidins bind to oral epithelial cells, and that the binding is concentration-, pH- and temperature-dependent, but is not affected by the presence of up to 13% ethanol. Furthermore, the presence of 13% ethanol did not alter in vivo astringency thresholds. However, a decrease in pH resulted in enhanced binding of grape seed procyanidins to oral epithelial cells, which supports our in vivo findings of decreased astringency recognition threshold at lower pH. These data indicate that the cells of the oral cavity may play a direct role in the astringent sensation.
Keywords: Astringency; Tannin; Grape seed; Procyanidin; Wine; Epithelial cell; Threshold; DMACA
RMID: 0020090417
DOI: 10.1016/j.foodchem.2008.12.061
Appears in Collections:Wine Science publications

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