Bioactivity of food peptides: biological response of rats to bovine milk whey peptides following acute exercise

Author(s)

Moura, Carolina Soares ; Barboza Lollo, Pablo Christiano ; Morato, Priscila Neder ; Risso, Eder Muller ; Amaya-Farfan, Jaime

• Document type: Journal article
• Source: FOOD & NUTRITION RESEARCH; v. 61, 2017.
• Web of Science Citations: 8

Abstract

Background: Several physiologically beneficial effects of consuming a whey protein hydrolysate (WPH) have been attributed to the greater availability of bioactive peptides. Aims: The aim was to investigate the effect of four branched-chain amino acid-(BCAA) containing dipeptides, present in WPH, on immune modulation, stimulation of HSP expression, muscle protein synthesis, glycogen content, satiety signals and the impact of these peptides on the plasma free amino acid profiles. Methods: The animals were divided in groups: control (rest, without gavage), vehicle (water), Lisoleucyl-L-leucine (lle-Leu), L-leucyl-L-isoleucine (Leu-lle), L-valyl-Lleucine (Val-Leu), L-leucyl-L-valine (Leu-Val) and WPH. All animals were submitted to acute exercise, except for control. Results: lle-Leu stimulated immune response, hepatic and muscle glycogen and HSP60 expression, whereas Leu-Val enhanced HSP90 expression. All dipeptides reduced glucagon-like peptide1 and glucose-dependent insulinotropic polypeptide, no changes were observed on leptin. All peptides inhibited NF-kB expression. The plasma amino acid time-course showed peptide-specific and isomer-specific metabolic features, including increases of the BCAAs. Conclusion: The data indicate that lle-Leu was effective to attenuate immune-suppression exercise-induced, promoted glycogen content and stimulated anti-stress effect (HSP). Furthermore, Leu-Val increased HSP90, p-4EBP1, p-mTOR and p-AMPK expression. The data suggest the involvement of these peptides in various beneficial functions of WPH consumption. (AU)

• FAPESP's process: 13/06494-5 - Metabolic impact of dietary whey proteins, peptides and amino acids thereof on the heat-shock proteins (HSPs) and associated parameters in rats
• Grantee: Jaime Amaya Farfan
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/02862-0 - Effect of whey proteins intake, peptides and amino acids in the heat shock proteins (HSPs) and related parameters in rats
• Grantee: Carolina Soares de Moura
• Support Opportunities: Scholarships in Brazil - Doctorate