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[A peptide bioregulator from bovine kappa-casein]
Voprosy Meditsinskoi Khimii
|January 1, 1987
Summary
Researchers isolated peptides from cow k-casein that mimic the effects of food satiation. These peptides, when administered to starved rabbits, induced brain activity similar to that seen after eating or when cholecystokinin is administered.
Area of Science:
- Biochemistry
- Neuroscience
- Food Science
Context:
- Investigating the physiological effects of specific peptide fractions derived from cow k-casein.
- Utilizing advanced biochemical separation techniques including gel filtration and ion exchange chromatography.
- Examining electroencephalogram (EEG) responses in animal models to understand neurophysiological impacts.
Purpose:
- To isolate and characterize peptides from pepsin hydrolysate of cow k-casein.
- To determine the physiological effects of these isolated peptides on brain activity, specifically related to satiation.
- To elucidate the potential role of these peptides in the regulation of the satiation sense.
Summary:
- Peptides were successfully isolated from cow k-casein using Sephadex G-50, Biogel P-2, Dowex WX2 chromatography, and Sephadex G-10 dialysis.
- Intravenous administration of the peptide fraction (20 µg/kg) to starved rabbits induced high-amplitude, high-frequency oscillations in brain electrical activity on EEG.
- These EEG patterns mimicked the effects of food satiation or cholecystokinin (CCK) administration, suggesting a role in appetite regulation.
Impact:
- The identified peptide fraction is likely a fragment of para-k-casein, located near a tyrosine residue.
- This research provides insights into the biochemical basis of satiation signaling.
- Findings may contribute to understanding and potentially manipulating appetite regulation through dietary peptides.