PMID- 30909557 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200929 IS - 2076-3921 (Print) IS - 2076-3921 (Electronic) IS - 2076-3921 (Linking) VI - 8 IP - 3 DP - 2019 Mar 23 TI - The Strong Antioxidant Sheep/Goat Whey Protein Protects Against mTOR Overactivation in Rats: A Mode of Action Mimicking Fasting. LID - 10.3390/antiox8030071 [doi] LID - 71 AB - Whey protein, a by-product of the cheese industry, can be putatively used as a functional food due to its beneficial health properties. The main objective of the present study was to assess in vivo the effect of a sheep/goat whey protein on the plasma amino acid profile and mammalian target of rapamycin (mTOR), a regulator of skeletal myogenesis. A control group was fed with a standard commercial diet while the experimental group received a standard commercial diet plus sheep/goat whey protein for 28 days. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was conducted to determine plasma amino acid levels while the expression of p70-S6 Kinase 1 (p70-S6K1) in liver and quadriceps muscles was quantified and used as a biomarker of mTOR activity. The results obtained showed a decrease in the levels of essential and branched-chain amino acids (BCAAs) in the experimental group. Furthermore, p70-S6K1 expression was decreased in the liver of rats consumed whey protein. In conclusion, the reduction of amino acid levels and the concomitant inactivation of mTOR imply that whey could potentially act protectively against disorders induced by mTOR overactivation. Intriguingly, this mode of action mimics fasting, an approach with established advantageous health effects. FAU - Kerasioti, Efthalia AU - Kerasioti E AD - Department of Biochemistry and Biotechnology, University of Thessaly, Viopolis, Mezourlo, 41500 Larissa, Greece. e-f-thalia@hotmail.com. FAU - Veskoukis, Aristidis AU - Veskoukis A AD - Department of Biochemistry and Biotechnology, University of Thessaly, Viopolis, Mezourlo, 41500 Larissa, Greece. veskoukis@uth.gr. FAU - Virgiliou, Christina AU - Virgiliou C AD - Laboratory of Analytical Chemistry, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. cr_virgi@hotmail.com. AD - Biomic_AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center, 57001 Thessaloniki, Greece. cr_virgi@hotmail.com. FAU - Theodoridis, Georgios AU - Theodoridis G AUID- ORCID: 0000-0002-2015-108X AD - Laboratory of Analytical Chemistry, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. gtheodor@chem.auth.gr. AD - Biomic_AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center, 57001 Thessaloniki, Greece. gtheodor@chem.auth.gr. FAU - Taitzoglou, Ioannis AU - Taitzoglou I AD - School of Veterinary Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. jotai@vet.auth.gr. FAU - Kouretas, Dimitrios AU - Kouretas D AD - Department of Biochemistry and Biotechnology, University of Thessaly, Viopolis, Mezourlo, 41500 Larissa, Greece. dkouret@uth.gr. LA - eng GR - 2016-050-0503-7344/State Scholaship Foundation/ PT - Journal Article DEP - 20190323 PL - Switzerland TA - Antioxidants (Basel) JT - Antioxidants (Basel, Switzerland) JID - 101668981 PMC - PMC6466539 OTO - NOTNLM OT - amino acids OT - disease OT - fasting OT - mTOR OT - sheep/goat whey protein COIS- The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. EDAT- 2019/03/27 06:00 MHDA- 2019/03/27 06:01 PMCR- 2019/03/23 CRDT- 2019/03/27 06:00 PHST- 2019/02/18 00:00 [received] PHST- 2019/03/21 00:00 [revised] PHST- 2019/03/21 00:00 [accepted] PHST- 2019/03/27 06:00 [entrez] PHST- 2019/03/27 06:00 [pubmed] PHST- 2019/03/27 06:01 [medline] PHST- 2019/03/23 00:00 [pmc-release] AID - antiox8030071 [pii] AID - antioxidants-08-00071 [pii] AID - 10.3390/antiox8030071 [doi] PST - epublish SO - Antioxidants (Basel). 2019 Mar 23;8(3):71. doi: 10.3390/antiox8030071.