title: Inhibition of trypsin by condensed tannins and wine.
abstract: Phenolic compounds are abundant vegetable secondary metabolites in the human diet. The ability of procyanidin oligomers and wine polyphenols to inhibit trypsin activity was studied using a versatile and reliable in vitro method. The hydrolysis of the chromogenic substrate N-benzoyl-d,l-arginine-p-nitroanilide (BApNA) by trypsin was followed by spectrophotometry in the presence and absence of condensed tannins and wine. A clear relationship between the degree of polymerization of procyanidins and enzymatic inhibition was observed. Trypsin activity inhibition was also detected in several types of wine. In general, the inhibition increased with the concentration of phenolic compounds in wines. These results may be relevant when considering these compounds as antinutritional factors, thereby contributing to a reduced absorption of nutrients.
authors: Centro de Investigação em Química, Departamento de Química, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal.
authors: Rui
authors: R
authors: Gonçalves
authors: Susana
authors: S
authors: Soares
authors: Nuno
authors: N
authors: Mateus
authors: Victor
authors: V
authors: de Freitas
mesh_terms: D005419:Flavonoids / Q000032:analysis / Q000494:pharmacology; D010636:Phenols / Q000032:analysis / Q000494:pharmacology; D059808:Polyphenols; D044945:Proanthocyanidins / Q000737:chemistry / Q000494:pharmacology*; D014361:Trypsin Inhibitors / Q000494:pharmacology*; D014920:Wine / Q000032:analysis*
chemical_list: D005419:Flavonoids; D010636:Phenols; D059808:Polyphenols; D044945:Proanthocyanidins; D014361:Trypsin Inhibitors