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Electro-activation of sweet defatted whey: Impact on the induced Maillard reaction products and bioactive peptides. 2017

Ourdia Kareb, and Ahmed Gomaa, and Claude P Champagne, and Julie Jean, and Mohammed Aïder
Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec, Qc G1V 0A6, Canada; Department of Food Sciences, Université Laval, Quebec, Qc G1V 0A6, Canada.

Electro-activation was used to add value to sweet defatted whey. This study aimed to investigate and to characterize the bioactive compounds formed under different electro-activation conditions by molecular and proteomic approaches. The effects of electric current intensity (400, 500 or 600mA) and whey concentration (7, 14 or 21% (w/v)) as a function of the electro-activation time (0, 15, 30 or 45min) were evaluated. The targeted dependent variables were the formation of Maillard reaction products (MRPs), protein hydrolysates and glycated compounds. It was shown that the MRPs derived from electro-activated whey at a concentration of 14% had the highest potential of biological activity. SDS-PAGE analyses indicated the formation of hydrolysates and glycated compounds with different molecular weight distributions. FTIR indicated the predominance of intermediate MRPs, such as the Schiff base compounds. LC-MS/MS and proteomics analysis showed the production of multi-functional bioactive peptides due to the hydrolysis of whey proteins.

UI MeSH Term Description Entries
D010455 Peptides Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are considered to be larger versions of peptides that can form into complex structures such as ENZYMES and RECEPTORS. Peptide,Polypeptide,Polypeptides
D000067796 Whey The liquid components of milk that remain after the CASEIN, fat, and fat soluble components have been removed. It is also a byproduct of cheese production.
D000067816 Whey Proteins The protein components of milk obtained from the whey. Whey Protein,Protein, Whey,Proteins, Whey
D015416 Maillard Reaction A group of nonenzymatic reactions in which ALDEHYDES; KETONES; or reducing sugars react with the amino groups of AMINO ACIDS; PEPTIDES; PROTEINS; LIPIDS; or NUCLEIC ACIDS.The reaction with reducing sugars (glycation) results in formation of Schiff bases which undergo Amadori rearrangement and other reactions that result in the irreversible formation of ADVANCED GLYCATION END PRODUCTS (AGEs). Food browning, such as occurs when cooking with high heat (grilling, frying, roasting, etc.) is attributed to the Maillard reaction. Non-enzymatic glycation and subsequent formation of AGEs also occurs in vivo and is accelerated under hyperglycemic and inflammatory conditions, and OXIDATIVE STRESS. Browning Reaction,Food Browning,Fructation,Glucation,Glycation,Lipid Glycation,Non-Enzymatic Glycation,Non-Enzymatic Glycosylation,Nonenzymatic Protein Glycation,Protein Glycation,Ribation,Browning Reactions,Browning, Food,Glycation, Lipid,Glycation, Non-Enzymatic,Glycation, Protein,Glycosylation, Non-Enzymatic,Non Enzymatic Glycation,Non Enzymatic Glycosylation,Protein Glycation, Nonenzymatic,Reaction, Browning,Reaction, Maillard,Reactions, Browning

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