Bioactivity of Cod and Chicken Protein Hydrolysates before and after in vitro Gastrointestinal Digestion
Journal article, 2017

Bioactivity of cod (Gadus morhua) and chicken (Gallus domesticus) protein hydrolysates before and aft er in vitro gastrointestinal (GI) digestion was investigated using yeast Saccharomyces cerevisiae as a model organism. Both hydrolysates were exposed to in vitro GI digestion prior to cellular exposure to simulate digestion conditions in the human body and therefore investigate the role of modulations in the GI tract on the cell response. The effect of digested and undigested hydrolysates on intracellular oxidation, cellular metabolic energy and proteome level was investigated. No diff erence in the eff ect on intracellular oxidation activity was obtained between cod and chicken hydrolysates, while higher aff ect on intracellular oxidation was provided by digested hydrolysates, with relative values of intracellular oxidation of cod of (70.2 +/- 0.8) and chicken of (74.5 +/- 1.4) % than by undigested ones, where values of cod and chicken were (95.5 +/- 1.2) and (90.5 +/- 0.7) %, respectively. Neither species nor digestion had any eff ect on cellular metabolic energy. At proteome level, digested hydrolysates gave again signifi cantly stronger responses than undigested counterparts; cod peptides here also gave somewhat stronger response than chicken peptides. The knowledge of the action of food protein hydrolysates and their digests within live cells, also at proteome level, is important for further validation of their activity in higher eukaryotes to develop new functional food ingredients, such as in this case chicken and cod muscle-derived peptides.


protein hydrolysates



in vitro gastrointestinal digestion



P. Jamnik

University of Ljubljana

K. Istenic

University of Ljubljana

T. Kostomaj

University of Ljubljana

T. Wulff

Technical University of Denmark (DTU)

M. Geirsdottir


Annette Almgren

Chalmers, Biology and Biological Engineering, Food and Nutrition Science

R. Jonsdottir


H. G. Kristinsson

University of Florida


Ingrid Undeland

Chalmers, Biology and Biological Engineering, Food and Nutrition Science

Food Technology and Biotechnology

1330-9862 (ISSN) 1334-2606 (eISSN)

Vol. 55 3 360-367

Subject Categories

Biochemistry and Molecular Biology



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