PMID- 27295130 OWN - NLM STAT- MEDLINE DCOM- 20171121 LR - 20211204 IS - 1873-4847 (Electronic) IS - 0955-2863 (Linking) VI - 34 DP - 2016 Aug TI - Zinc stimulates glucose consumption by modulating the insulin signaling pathway in L6 myotubes: essential roles of Akt-GLUT4, GSK3beta and mTOR-S6K1. PG - 126-35 LID - S0955-2863(16)30107-3 [pii] LID - 10.1016/j.jnutbio.2016.05.008 [doi] AB - The present study was performed to evaluate the insulin-like effects of zinc in normal L6 myotubes as well as its ability to alleviate insulin resistance. Glucose consumption was measured in both normal and insulin-resistant L6 myotubes. Western blotting and immunofluorescence revealed that zinc exhibited insulin-like glucose transporting effects by activating key markers that are involved in the insulin signaling cascade (including Akt, GLUT4 and GSK3beta), and downregulating members of the insulin signaling feedback cascade such as mammalian target of rapamycin (mTOR) and ribosomal protein S6 kinase (S6K1). In normal L6 myotubes, zinc enhanced glucose consumption via a mechanism that might involve the activation of Akt phosphorylation, glucose transporter 4 (GLUT4) translocation and GSK3beta phosphorylation. In contrast, zinc exerted insulin-mimetic effects in insulin-resistant L6 myotubes by upregulating Akt phosphorylation, GLUT4 translocation and GSK3beta phosphorylation, and downregulating the expression of mTOR and S6K1. In conclusion, zinc might enhance glucose consumption by modulating insulin signaling pathways including Akt-GLUT4, GSK3beta, mTOR and S6K1. CI - Copyright (c) 2016 Elsevier Inc. All rights reserved. FAU - Wu, Yuntang AU - Wu Y AD - Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Medical University, Tianjin, China. Electronic address: Wuyuntang@tmu.edu.cn. FAU - Lu, Huizi AU - Lu H AD - Tanggu Centers for Disease Control and Prevention, Tianjin Binhai New Area,Tianjin, China. FAU - Yang, Huijun AU - Yang H AD - Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Medical University, Tianjin, China. FAU - Li, Chunlei AU - Li C AD - Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Medical University, Tianjin, China. FAU - Sang, Qian AU - Sang Q AD - Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Medical University, Tianjin, China. FAU - Liu, Xinyan AU - Liu X AD - Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Medical University, Tianjin, China. FAU - Liu, Yongzhe AU - Liu Y AD - Department of Toxicology, School of Public Health, Tianjin Medical University, Tianjin, China. FAU - Wang, Yongming AU - Wang Y AD - Department of Toxicology, School of Public Health, Tianjin Medical University, Tianjin, China. FAU - Sun, Zhong AU - Sun Z AD - Department of Epidemiology and biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China. LA - eng PT - Journal Article DEP - 20160531 PL - United States TA - J Nutr Biochem JT - The Journal of nutritional biochemistry JID - 9010081 RN - 0 (Biomarkers) RN - 0 (Glucose Transporter Type 4) RN - 0 (Slc2a4 protein, rat) RN - EC 2.7.1.1 (mTOR protein, rat) RN - EC 2.7.11.1 (Glycogen Synthase Kinase 3 beta) RN - EC 2.7.11.1 (Gsk3b protein, rat) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.1 (Ribosomal Protein S6 Kinases) RN - EC 2.7.11.1 (Rps6kb1 protein, rat) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - IY9XDZ35W2 (Glucose) RN - J41CSQ7QDS (Zinc) SB - IM MH - Absorption, Physiological MH - Animals MH - Biomarkers/metabolism MH - Cell Line MH - Dietary Supplements MH - Enzyme Activation MH - Glucose/metabolism MH - Glucose Transporter Type 4/*agonists/metabolism MH - Glycogen Synthase Kinase 3 beta/chemistry/*metabolism MH - *Insulin Resistance MH - Muscle Fibers, Skeletal/cytology/enzymology/*metabolism MH - Phosphorylation MH - Protein Processing, Post-Translational MH - Protein Transport MH - Proto-Oncogene Proteins c-akt/*agonists/metabolism MH - Rats MH - Ribosomal Protein S6 Kinases/antagonists & inhibitors/metabolism MH - *Signal Transduction MH - TOR Serine-Threonine Kinases/antagonists & inhibitors/metabolism MH - Zinc/*metabolism OTO - NOTNLM OT - Akt OT - GSK3beta OT - Glucose consumption OT - Insulin signaling pathway OT - L6 myotubes OT - Zinc OT - mTOR EDAT- 2016/06/14 06:00 MHDA- 2017/11/29 06:00 CRDT- 2016/06/14 06:00 PHST- 2015/11/10 00:00 [received] PHST- 2016/05/10 00:00 [revised] PHST- 2016/05/17 00:00 [accepted] PHST- 2016/06/14 06:00 [entrez] PHST- 2016/06/14 06:00 [pubmed] PHST- 2017/11/29 06:00 [medline] AID - S0955-2863(16)30107-3 [pii] AID - 10.1016/j.jnutbio.2016.05.008 [doi] PST - ppublish SO - J Nutr Biochem. 2016 Aug;34:126-35. doi: 10.1016/j.jnutbio.2016.05.008. Epub 2016 May 31.