PMID- 29864915 OWN - NLM STAT- MEDLINE DCOM- 20181011 LR - 20181011 IS - 1950-6007 (Electronic) IS - 0753-3322 (Linking) VI - 103 DP - 2018 Jul TI - Dihydrocurcumin ameliorates the lipid accumulation, oxidative stress and insulin resistance in oleic acid-induced L02 and HepG2 cells. PG - 1327-1336 LID - S0753-3322(18)31509-9 [pii] LID - 10.1016/j.biopha.2018.04.143 [doi] AB - AIMS: Curcumin is a polyphenol compound with many pharmacological activities including antioxidant, lipid-loweing and liver protective. Dihydrocurcumin (DHC) is one of the major metabolites of curcumin. So far, the pharmacological activity of DHC has not been reported. Here, we evaluate the effects of DHC on oleic acid (OA)-induced lipid accumulation, oxidative stress and insulin resistance and the underlying mechanism in L02 and HepG2 cells. MAIN METHODS: OA-induced L02 and HepG2 cells were used as the in vitro model of nonalcoholic fatty liver disease (NAFLD). Lipid accumulation, oxidative stress, glucose uptake and cell inflammation were evaluated by cellular biochemical assay, respectively. Signaling pathways involved in lipid metabolism including peroxisome proliferator activated receptor-alpha (PPARalpha), the sterol regulatory element binding protein-1C (SREBP-1C) and patatin-like phospholipase domain containing 3 (PNPLA3), glucose uptake including phosphatidylinositol 3-kinase (PI3K) and phosphorylated serine-threonine protein kinase (pAKT), and oxidative stress including nuclear factor E2-related factor 2 (Nrf2), cytochrome P450 4A (CYP4A) and 2E1 (CYP2E1) were investigated by western blotting and RT-qPCR, respectively. KEY FINDINGS: DHC decreased the levels of cellular triglycerides (TG) by regulating the mRNA and protein expression levels of SREBP-1C, PNPLA3 and PPARalpha. At the same time, DHC improved the hepatocellular glucose uptake by increasing the protein expression levels of pAKT and PI3K. Furthermore, DHC reduced the levels of cellular NO and ROS via Nrf2 signaling pathways. SIGNIFICANCE: The present study firstly revealed that DHC ameliorated OA-induced steatosis through regulating the lipid metabolism, oxidative stress and insulin resistance in HepG2 and L02 cells. CI - Copyright (c) 2018 Elsevier Masson SAS. All rights reserved. FAU - Yu, Qingqing AU - Yu Q AD - Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei University, Wuhan Hubei 430062, PR China. FAU - Liu, Yayun AU - Liu Y AD - Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei University, Wuhan Hubei 430062, PR China. FAU - Wu, Yufei AU - Wu Y AD - Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei University, Wuhan Hubei 430062, PR China. FAU - Chen, Yong AU - Chen Y AD - Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei University, Wuhan Hubei 430062, PR China. Electronic address: cy101610@qq.com. LA - eng PT - Journal Article DEP - 20180507 PL - France TA - Biomed Pharmacother JT - Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie JID - 8213295 RN - 0 (RNA, Messenger) RN - 0 (Reactive Oxygen Species) RN - 0 (Triglycerides) RN - 2UMI9U37CP (Oleic Acid) RN - 31C4KY9ESH (Nitric Oxide) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - IT942ZTH98 (Curcumin) RN - IY9XDZ35W2 (Glucose) SB - IM MH - Cell Death/drug effects MH - Cell Survival/drug effects MH - Curcumin/chemistry/*pharmacology MH - Gene Expression Regulation/drug effects MH - Glucose/metabolism MH - Hep G2 Cells MH - Humans MH - Inflammation/pathology MH - *Insulin Resistance MH - Lipid Metabolism/*drug effects MH - Nitric Oxide/metabolism MH - Oleic Acid/*pharmacology MH - Oxidative Stress/*drug effects MH - Phosphatidylinositol 3-Kinases/metabolism MH - Phosphorylation/drug effects MH - Proto-Oncogene Proteins c-akt/metabolism MH - RNA, Messenger/genetics/metabolism MH - Reactive Oxygen Species/metabolism MH - Signal Transduction/drug effects MH - Triglycerides/metabolism OTO - NOTNLM OT - Dihydrocurcumin OT - Insulin resistance OT - Lipid metabolism OT - NAFLD OT - Oxidative stress EDAT- 2018/06/06 06:00 MHDA- 2018/10/12 06:00 CRDT- 2018/06/06 06:00 PHST- 2018/03/08 00:00 [received] PHST- 2018/04/18 00:00 [revised] PHST- 2018/04/18 00:00 [accepted] PHST- 2018/06/06 06:00 [entrez] PHST- 2018/06/06 06:00 [pubmed] PHST- 2018/10/12 06:00 [medline] AID - S0753-3322(18)31509-9 [pii] AID - 10.1016/j.biopha.2018.04.143 [doi] PST - ppublish SO - Biomed Pharmacother. 2018 Jul;103:1327-1336. doi: 10.1016/j.biopha.2018.04.143. Epub 2018 May 7.