Antioxidant peptides from gastrointestinal digestion of amaranth proteins: A first approach to the evaluation of the intestinal absorption and subsequent activity

Authors

  • Valeria Anahí Tironi Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA) (CCT La Plata - CONICET, UNLP)
  • María C. Orsini Delgado Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA) (CCT La Plata - CONICET, UNLP)
  • María C. Añón Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA) (CCT La Plata - CONICET, UNLP)

DOI:

https://doi.org/10.26461/11.02

Keywords:

Amaranth, antioxidant peptides, gastrointestinal digestion, intestinal absorption

Abstract

Intestinal absorption of antioxidant peptides from simulated gastrointestinal digestion of Amaranthus mantegazzianusproteins was evaluated. Gastrointestinal digests (AD and HD) were obtained from protein isolate (A) and its alcalase hydrolysate (H) and separated by molecular exclusion FPLC into fractions which activity was evaluated by the ORAC and HORAC methods. Active fractions (0,7-1,8 kDa) were submitted to intestinal absorption simulation using monolayers of Caco-2/TC7 cells on polyester inserts (0,4 μm). Samples were seeded in the apical compartment (incubation 3 h, 37 ºC). Original, apical and basolateral samples were analysed for peptide concentration (Lowry method), molecular composition (RP-HPLC) and antioxidant activity (ORAC method). Some peptides were able to cross the cell monolayer, with previous modifications in some cases. The antioxidant potential of the apical compartments increased in all cases due probably to the action of the brush border peptidases. Basolateral compartments presented increments or reductions of the antioxidant potentials respect to the apical ones, depending on which molecules crossed the monolayer in each case. Results suggest a potential intestinal absorption of amaranth antioxidant peptides which would be able to act inside the organism.

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Published

2016-07-19

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Articles

How to Cite

Antioxidant peptides from gastrointestinal digestion of amaranth proteins: A first approach to the evaluation of the intestinal absorption and subsequent activity. (2016). INNOTEC, 1(11 ene-jul), 18-26. https://doi.org/10.26461/11.02