Titre : | Beta-Casein(94-123)-derived peptides differently modulate production of mucins in intestinal goblet cells (2014) |
Auteurs : | P. Plaisancie ; R. Boutrou ; M. Estienne ; G. Henry ; J. Jardin ; A. Paquet ; J. Leonil |
Type de document : | Article : texte imprimé |
Dans : | JOURNAL OF DAIRY RESEARCH (11 p., 2014-08-01) |
Article en page(s) : | 11 p. |
Langues: | Anglais |
Mots-clés : |
Equivoc Intestin Grêle ; Lait ; Médecine Humaine ; ProtectionMots-clés cheval MUCUS |
Résumé : | We recently reported the identification of a peptide from yoghurts with promising potential for intestinal health: the sequence (94-123) of bovine ?-casein. This peptide, composed of 30 amino acid residues, maintains intestinal homoeostasis through production of the secreted mucin MUC2 and of the transmembrane-associated mucin MUC4. Our study aimed to search for the minimal sequence responsible for the biological activity of ?-CN(94-123) by using several strategies based on (i) known bioactive peptides encrypted in ?-CN(94-123), (ii) in silico prediction of peptides reactivity and (iii) digestion of ?-CN(94-123) by enzymes of intestinal brush border membranes. The revealed sequences were tested in vitro on human intestinal mucus-producing HT29-MTX cells. We demonstrated that ?-CN(108-113) (an ACE-inhibitory peptide) and ?-CN(114-119) (an opioid peptide named neocasomorphin-6) up-regulated MUC4 expression whereas levels of the secreted mucins MUC2 and MUC5AC remained unchanged. The digestion of ?-CN(94-123) by intestinal enzymes showed that the peptides ?-CN(94-108) and ?-CN(117-123) were present throughout 1·5 to 3 h of digestion, respectively. These two peptides raised MUC5AC expression while ?-CN(117-123) also induced a decrease in the level of MUC2 mRNA and protein. In addition, this inhibitory effect was reproduced in airway epithelial cells. In conclusion, ?-CN(94-123) is a multifunctional molecule but only the sequence of 30 amino acids has a stimulating effect on the production of MUC2, a crucial factor of intestinal protection. |
Cote du document numérique : | 17352 |
Classement cheval : | B01 |