On the trail of milk bioactive peptides in human and animal intestinal tracts during digestion
2015
Boutrou, Rachel | Henry, Gwenaele | Sanchez Rivera, Laura | Science et Technologie du Lait et de l'Oeuf (STLO) ; Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST | Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] (CSIC) | Food and Agriculture COST (European Cooperation in Science and Technology) Action FA1005 “Improving health properties of food by sharing our knowledge on the digestive process” (INFOGEST).
Digestion of proteins leads to the release of numerous peptides in the gastrointestinal tract, among them several bioactive peptides. This review compiles, organises and critically analyses the information available on bioactivepeptides present in vivo in the digestive tract of adult humans and animals. It focuses on milk proteins, which are recognised as one of the main sources of bioactive peptides with different biological functions. To date, few studies have been performed on the presence of milk-derived peptides in the intestinal tract in vivo. The diversity of these studies is remarkable in terms of the milk products that have been tested, the animal models selected and the segment of the digestive tract considered. Altogether, 69 bioactive peptides identified in vivo are reviewed. Most of them are released from casein, and especially from β-casein, to which 38 bioactive peptides are attributed. These sequences can be classified mainly as angiotensin-converting enzyme (ACE) inhibitors, opioids and antimicrobial peptides. Particular attention is paid to β-casomorphins and caseinomacropeptide-derived peptides. The function of caseinophosphopeptides as a mineral carrier is also discussed. Few bioactive peptides derive from whey proteins.
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