Opioid peptides encrypted in intact milk protein sequences.
Opioid agonistic and antagonistic peptides which are inactive within the sequence of the precursor milk proteins can be released and thus activated by enzymatic proteolysis, for example during gastrointestinal digestion or during food processing. Activated opioid peptides are potential modulators of various regulatory processes in the body. Opioid peptides can interact with subepithelial opioid receptors or specific luminal binding sites in the intestinal tract. Furthermore, they may be absorbed and then reach endogenous opioid receptors.
Bundesanstalt für Milchforschung, Institut für Chemie und Physik, Kiel, Germany. meisel@bafm.de
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FitzGerald
D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001688:Biological Products / Q000627:therapeutic use; D002364:Caseins / Q000378:metabolism; D004723:Endorphins / Q000235:genetics / Q000378:metabolism; D006801:Humans; D007408:Intestinal Absorption; D008322:Mammals; D008894:Milk Proteins / Q000737:chemistry*; D018847:Opioid Peptides / Q000737:chemistry* / Q000502:physiology; D010447:Peptide Hydrolases / Q000378:metabolism; D011994:Recombinant Proteins / Q000008:administration & dosage
D001688:Biological Products; D002364:Caseins; D004723:Endorphins; D008894:Milk Proteins; D018847:Opioid Peptides; D011994:Recombinant Proteins; C021968:beta-casomorphins; D010447:Peptide Hydrolases