Exploring the fate of phlorotannins from Laminaria digitata across the gastrointestinal tract: Insights into susceptibility and bioactivity prior and post gastrointestinal digestion.
Food Res Int
; 191: 114641, 2024 Sep.
Article
de En
| MEDLINE
| ID: mdl-39059898
ABSTRACT
Phlorotannins are phenolic compounds exclusive from brown macroalgae endowed with promising bioactive properties. However, considering that diet is their main route of entrance to our system, gastrointestinal digestion might affect such bioactive properties. Here, phlorotannin extracts obtained from Laminaria digitata were submitted to simulated gastrointestinal digestion to evaluate its impact on their antioxidant and anti-inflammatory properties. Overall, a reduction of the total phlorotannin content along the gastrointestinal tract was noticed, although the antioxidant activity measured in vitro via NOâ and O2â- scavenging assays, maintained almost the same. The crude extract (70 % v/v acetone) exhibited superior inhibition of NOâ release on lipopolysaccharide-stimulated cells after digestion. In contrast, the opposite occurred to the phlorotannin-purified extract, indicating that the digestive process favors the anti-inflammatory properties of the former but not the latter. Data collected from UHPLC-MS analysis revealed that the fuhalol and carmalol-type compounds were completely absent from the digested phlorotannin-purified extract, which could partly explain its lower anti-inflammatory activity compared with its non-digested counterpart. Overall, this study contributes to a better understanding of the impact of gastrointestinal digestion on the bioactivity profile of L. digitata phlorotannins, demonstrating that fuhalols and carmalols are particularly susceptible to the digestive process.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Tanins
/
Tube digestif
/
Digestion
/
Laminaria
/
Anti-inflammatoires
/
Antioxydants
Limites:
Animals
/
Humans
Langue:
En
Journal:
Food Res Int
Année:
2024
Type de document:
Article
Pays d'affiliation:
Portugal