PMID- 28024794 OWN - NLM STAT- MEDLINE DCOM- 20170531 LR - 20211204 IS - 2352-3840 (Electronic) IS - 1499-2671 (Linking) VI - 41 IP - 2 DP - 2017 Apr TI - Does Resveratrol Improve Insulin Signalling in HepG2 Cells? PG - 211-216 LID - S1499-2671(15)30080-0 [pii] LID - 10.1016/j.jcjd.2016.09.015 [doi] AB - OBJECTIVES: Diabetes mellitus is a common metabolic disorder with high global prevalence. It is characterized by a decrease in insulin secretion or a decrease in insulin sensitivity or both. The aim of the present study was to investigate the effects of resveratrol treatment on the expression of the genes involved in insulin signalling cascade, such as Forkhead box protein O1 (FoxO1), 3-phosphoinositide-dependent protein kinase 1 (PDPK1) and mammalian target of rapamycin (mTOR). METHODS: HepG2 cells were cultured in serum-free medium with high concentrations of glucose and insulin and then were treated with resveratrol (5, 10 and 20 microM) for 24 and 48 hours. Complementary deoxyribonucleic acids (cDNAs) were synthesized followed by RNA extraction. Real-time quantitative reverse transcription polymerase chain reaction was used to analyze the expression of FoxO1, PDPK1 and mTOR. RESULTS: Resveratrol increased the expression of PDPK1, mTOR and FoxO1. No significant difference was seen among differing dosages of resveratrol, but treatments for 48 hours exerted the greatest effectiveness. CONCLUSIONS: Our results were consistent with other studies showing the beneficial effects of resveratrol on diabetes. However, considering the effects of resveratrol in increasing FoxO1 and gluconeogenic gene expression, long-term usage of resveratrol should be investigated in greater depth in future studies. CI - Copyright (c) 2016 Canadian Diabetes Association. Published by Elsevier Inc. All rights reserved. FAU - Norouzzadeh, Marjan AU - Norouzzadeh M AD - Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran. FAU - Amiri, Fatemehsadat AU - Amiri F AD - Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran. FAU - Saboor-Yaraghi, Ali Akbar AU - Saboor-Yaraghi AA AD - Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran. FAU - Shemirani, Farnoosh AU - Shemirani F AD - Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran. FAU - Kalikias, Yas AU - Kalikias Y AD - Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran. FAU - Sharifi, Loghman AU - Sharifi L AD - Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran. FAU - Seyyedsalehi, Monireh Sadat AU - Seyyedsalehi MS AD - Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran. FAU - Mahmoudi, Maryam AU - Mahmoudi M AD - Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetic, Tehran University of Medical Sciences, Tehran, Iran. Electronic address: mahmoodi_maryam@yahoo.com. LA - eng PT - Journal Article DEP - 20161223 PL - Canada TA - Can J Diabetes JT - Canadian journal of diabetes JID - 101148810 RN - 0 (FOXO1 protein, human) RN - 0 (Forkhead Box Protein O1) RN - 0 (Insulin) RN - 0 (Stilbenes) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.11.1 (3-Phosphoinositide-Dependent Protein Kinases) RN - EC 2.7.11.1 (PDPK1 protein, human) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - Q369O8926L (Resveratrol) SB - IM MH - 3-Phosphoinositide-Dependent Protein Kinases/genetics/metabolism MH - Forkhead Box Protein O1/genetics/metabolism MH - Gene Expression Regulation/drug effects MH - Hep G2 Cells MH - Humans MH - Insulin/*metabolism MH - Real-Time Polymerase Chain Reaction MH - Resveratrol MH - Signal Transduction/drug effects MH - Stilbenes/*pharmacology MH - TOR Serine-Threonine Kinases/genetics/metabolism OTO - NOTNLM OT - FoxO1 OT - HepG2 OT - PDPK1 OT - insulin resistance OT - insulinoresistance OT - mTOR OT - resveratrol OT - resveratrol EDAT- 2016/12/28 06:00 MHDA- 2017/06/01 06:00 CRDT- 2016/12/28 06:00 PHST- 2015/12/24 00:00 [received] PHST- 2016/09/05 00:00 [revised] PHST- 2016/09/28 00:00 [accepted] PHST- 2016/12/28 06:00 [pubmed] PHST- 2017/06/01 06:00 [medline] PHST- 2016/12/28 06:00 [entrez] AID - S1499-2671(15)30080-0 [pii] AID - 10.1016/j.jcjd.2016.09.015 [doi] PST - ppublish SO - Can J Diabetes. 2017 Apr;41(2):211-216. doi: 10.1016/j.jcjd.2016.09.015. Epub 2016 Dec 23.