Proanthocyanidins and hydrolysable tannins: occurrence, dietary intake and pharmacological effects

British Journal of Pharmacology - Tập 174 Số 11 - Trang 1244-1262 - 2017
Antonella Smeriglio1, Davide Barreca1, Ersilia Bellocco1, Domenico Trombetta1
1Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy

Tóm tắt

Tannins are a heterogeneous group of high MW, water‐soluble, polyphenolic compounds, naturally present in cereals, leguminous seeds and, predominantly, in many fruits and vegetables, where they provide protection against a wide range of biotic and abiotic stressors. Tannins exert several pharmacological effects, including antioxidant and free radical scavenging activity as well as antimicrobial, anti‐cancer, anti‐nutritional and cardio‐protective properties. They also seem to exert beneficial effects on metabolic disorders and prevent the onset of several oxidative stress‐related diseases. Although the bioavailability and pharmacokinetic data for these phytochemicals are still sparse, gut absorption of these compounds seems to be inversely correlated with the degree of polymerization. Further studies are mandatory to better clarify how these molecules and their metabolites are able to cross the intestinal barrier in order to exert their biological properties. This review summarizes the current literature on tannins, focusing on the main, recently proposed mechanisms of action that underlie their pharmacological and disease‐prevention properties, as well as their bioavailability, safety and toxicology.Linked ArticlesThis article is part of a themed section on Principles of Pharmacological Research of Nutraceuticals. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.11/issuetoc

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