title: Resveratrol prevents hepatic steatosis and endoplasmic reticulum stress and regulates the expression of genes involved in lipid metabolism, insulin resistance, and inflammation in rats.
abstract: Previous research demonstrated that resveratrol possesses promising properties for preventing obesity. Endoplasmic reticulum (ER) stress was proposed to be involved in the pathophysiology of both obesity and hepatic steatosis. In the current study, we hypothesized that resveratrol could protect against high-fat diet (HFD)-induced hepatic steatosis and ER stress and regulate the expression of genes related to hepatic steatosis. Rats were fed either a control diet or a HFD for 12 weeks. After 4 weeks, HFD-fed rats were treated with either resveratrol or vehicle for 8 weeks. Body weight, serum metabolic parameters, hepatic histopathology, and hepatic ER stress markers were evaluated. Moreover, an RT2 Profiler Fatty Liver PCR Array was performed to investigate the mRNA expressions of 84 genes related to hepatic steatosis. Our work showed that resveratrol prevented dyslipidemia and hepatic steatosis induced by HFD. Resveratrol significantly decreased activating transcription factor 4, C/EBP-homologous protein and immunoglobulin binding protein levels, which were elevated by the HFD. Resveratrol also decreased PKR-like ER kinase phosphorylation, although it was not affected by the HFD. Furthermore, resveratrol increased the expression of peroxisome proliferator-activated receptor δ, while decreasing the expression of ATP citrate lyase, suppressor of cytokine signaling-3, and interleukin-1β. Our data suggest that resveratrol can prevent hepatic ER stress and regulate the expression of peroxisome proliferator-activated receptor δ, ATP citrate lyase, suppressor of cytokine signaling-3, tumor necrosis factor α, and interleukin-1β in diet-induced obese rats, and these effects likely contribute to resveratrol's protective function against excessive accumulation of fat in the liver.
authors.affiliation: Department of Endocrinology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China.
authors.forename: Qing-Rong
authors.initials: QR
authors.lastname: Pan
authors.affiliation: Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, 100029, China.
authors.forename: Yan-Long
authors.initials: YL
authors.lastname: Ren
authors.affiliation: Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, 100029, China.
authors.forename: Wen-Xian
authors.initials: WX
authors.lastname: Liu
authors.affiliation: Department of Endocrinology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China.
authors.forename: Yan-Jin
authors.initials: YJ
authors.lastname: Hu
authors.affiliation: Department of Traditional Chinese medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China.
authors.forename: Jin-Su
authors.initials: JS
authors.lastname: Zheng
authors.affiliation: Department of Endocrinology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China. Electronic address: xuyuan32001@sina.com.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Department of Endocrinology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China. Electronic address: drwg6688@163.com.
authors.forename: Guang
authors.initials: G
authors.lastname: Wang
mesh_terms: D000818:Animals; D059305:Diet, High-Fat; D050171:Dyslipidemias / Q000235:genetics / Q000378:metabolism / Q000517:prevention & control; D059865:Endoplasmic Reticulum Stress / Q000187:drug effects*; D015870:Gene Expression / Q000187:drug effects; D007249:Inflammation / Q000235:genetics*; D007333:Insulin Resistance / Q000235:genetics*; D050356:Lipid Metabolism / Q000235:genetics*; D008099:Liver / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D065626:Non-alcoholic Fatty Liver Disease / Q000235:genetics / Q000378:metabolism / Q000517:prevention & control*; D008517:Phytotherapy; D010936:Plant Extracts / Q000494:pharmacology / Q000627:therapeutic use; D017207:Rats, Sprague-Dawley; D000077185:Resveratrol; D013267:Stilbenes / Q000494:pharmacology / Q000627:therapeutic use*
chemical_list: D010936:Plant Extracts; D013267:Stilbenes; D000077185:Resveratrol
keywords: Endoplasmic reticulum stress; Hepatic steatosis; PCR array; Rat; Resveratrol