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Meng X, Long M, Yue N, Li Q, Chen J, Zhao H, Deng W. LncRNA MEG3 Restrains Hepatic Lipogenesis via the FOXO1 Signaling Pathway in HepG2 Cells. Cell Biochem Biophys 2024; 82:1253-1259. [PMID: 38713402 PMCID: PMC11344712 DOI: 10.1007/s12013-024-01278-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2024] [Indexed: 05/08/2024]
Abstract
Nonalcoholic fatty liver disease (NAFLD) become a main public health concern, and is characterized by lipid accumulation in the hepatocytes. We found that overexpression of lncRNA MEG3 significantly reduced the expression of FOXO1, ACC1, and FAS, and subsequently decreased the lipid accumulation in HepG2 cells. Moreover, inhibition of lncRNA MEG3 could increase the lipid accumulation and the mRNA and protein levels of FOXO1, ACC1, and FAS. Further study showed that lncRNA MEG3 regulates the lipogenesis process by inhibiting the entry of FOXO1 into the nucleus translocation. Our study demonstrated that lncRNA MEG3 regulates de novo lipogenesis by decreasing the expression and nucleus translocation of FOXO1 in HepG2 cells, suggesting that lncRNA MEG3 could be a promising therapeutic target in lipid metabolic disorders.
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Affiliation(s)
- Xiangyu Meng
- The Central Laboratory, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China
| | - Mei Long
- Department of Cardiology, ZiBo Central Hospital, Zibo, Shandong, 255000, China
| | - Nanxi Yue
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neural and Vascular Biology, Ministry of Education of China, Hebei Medical University, Shijiazhuang, Hebei, 050017, PR China
| | - Quan Li
- Department of Endocrinology, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China
| | - Jia Chen
- Department of Endocrinology, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China
| | - Hongye Zhao
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neural and Vascular Biology, Ministry of Education of China, Hebei Medical University, Shijiazhuang, Hebei, 050017, PR China.
| | - Wei Deng
- Department of Endocrinology, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China.
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2
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Tsai MC, Wang CC, Tsai IN, Yu MH, Yang MY, Lee YJ, Chan KC, Wang CJ. Improving the Effects of Mulberry Leaves and Neochlorogenic Acid on Glucotoxicity-Induced Hepatic Steatosis in High Fat Diet Treated db/db Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:6339-6346. [PMID: 38488910 PMCID: PMC10979445 DOI: 10.1021/acs.jafc.3c09033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 02/27/2024] [Accepted: 02/29/2024] [Indexed: 03/17/2024]
Abstract
There are many complications of type 2 diabetes mellitus. Nonalcoholic fatty liver disease (NAFLD) and nonalcoholic steatohepatitis (NASH) are two complications related to the increased lipid accumulation in the liver. Previous studies have shown that mulberry leaf water extract (MLE) has the effect of lowering lipid levels in peripheral blood, inhibiting the expression of fatty acid synthase (FASN) and increasing the activity of liver antioxidant enzymes superoxide dismutase (SOD) and catalase. Our study aimed to investigate the role of MLE and its main component, neochlorogenic acid (nCGA), in reducing serum lipid profiles, decreasing lipid deposition in the liver, and improving steatohepatitis levels. We evaluated the antioxidant activity including glutathione (GSH), glutathione reductase (GRd), glutathione peroxidase (GPx), glutathione S-transferase (GST), and superoxide dismutase (SOD), and catalase was tested in mice fed with MLE and nCGA. The results showed a serum lipid profile, and fatty liver scores were significantly increased in the HFD group compared to the db/m and db mice groups, while liver antioxidant activity significantly decreased in the HFD group. When fed with HFD + MLE or nCGA, there was a significant improvement in serum lipid profiles, liver fatty deposition conditions, steatohepatitis levels, and liver antioxidant activity compared to the HFD group. Although MLE and nCGA do not directly affect the blood sugar level of db/db mice, they do regulate abnormalities in lipid metabolism. These results demonstrate the potential of MLE/nCGA as a treatment against glucotoxicity-induced diabetic fatty liver disease in animal models.
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Affiliation(s)
- Ming-Chang Tsai
- Division
of Gastroenterology and Hepatology, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung 402, Taiwan
- School
of Medical, Chung Shan Medical University, Taichung 402, Taiwan
| | - Chi-Chih Wang
- Division
of Gastroenterology and Hepatology, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung 402, Taiwan
- School
of Medical, Chung Shan Medical University, Taichung 402, Taiwan
| | - I-Ning Tsai
- Institute
of Medicine, Chung Shan Medical University, Taichung 402, Taiwan
| | - Meng-Hsun Yu
- Department
of Nutrition, Chung Shan Medical University, No. 110, Section 1, Jianguo North
Road, Taichung 402, Taiwan
| | - Mon-Yuan Yang
- Department
of Health Diet and Industry Management, Chung Shan Medical University, Taichung 402, Taiwan
| | - Yi-Ju Lee
- Department
of Pathology, Chung Shan Medical University
Hospital, Taichung 402, Taiwan
| | - Kuei-Chuan Chan
- School
of Medical, Chung Shan Medical University, Taichung 402, Taiwan
- Department
of Internal Medicine, Chung-Shan Medical
University Hospital, No. 110, Section 1, Jianguo North Road, Taichung 402 and Taiwan
| | - Chau-Jong Wang
- Department
of Health Diet and Industry Management, Chung Shan Medical University, Taichung 402, Taiwan
- Department
of Medical Research, Chung Shan Medical
University Hospital, Taichung 402, Taiwan
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3
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Gong Y, Lu Q, Xi L, Liu Y, Yang B, Su J, Liu H, Jin J, Zhang Z, Yang Y, Zhu X, Xie S, Han D. F6P/G6P-mediated ChREBP activation promotes the insulin resistance-driven hepatic lipid deposition in zebrafish. J Nutr Biochem 2023; 122:109452. [PMID: 37748621 DOI: 10.1016/j.jnutbio.2023.109452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 08/15/2023] [Accepted: 09/21/2023] [Indexed: 09/27/2023]
Abstract
Insulin-sensitive lipogenesis dominates the body lipid deposition; however, nonalcoholic fatty liver disease (NAFLD) develops in the insulin-resistant state. The regulation mechanism of insulin resistance-driven NAFLD remains elusive. Using zebrafish model of insulin resistance (ZIR, insrb-/-) and mouse hepatocytes (NCTC 1469), we explored the regulation mechanism of insulin resistance-driven hepatic lipid deposition under the stimulation of carbohydrate diet (CHD). In ZIR model, insulin resistance induced hyperlipidemia and elevated hepatic lipid deposition via elevating the gene/protein expressions of lipogenic enzymes, that was activated by carbohydrate response element binding protein (ChREBP), rather than sterol regulatory element binding proteins 1c (SREBP-1c). The metabolomic analysis in zebrafish and silencing of chrebp in mouse hepatocytes revealed that the increased hepatic frucotose-6-phosphate (F6P) and glucose-6-phosphate (G6P) promoted the ChREBP-mediated lipid deposition. We further identified that F6P alone was sufficient to activate ChREBP-mediated lipid deposition by a SREBP-1c-independent manner. Moreover, we clarified the suppressed hepatic phosphofructokinase/glucose-6-phosphatase functions and the normal glucokinase function preserved by glucose transporter 2 (GLUT2) manipulated the increased F6P/G6P content in ZIR. In conclusion, the present study revealed that insulin resistance promoted hepatic lipid deposition via the F6P/G6P-mediated ChREBP activation. Our findings deciphered the main regulation pathway for the liver lipid deposition in the insulin-resistant state and identified F6P as a new potential regulator for ChREBP.
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Affiliation(s)
- Yulong Gong
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Qisheng Lu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Longwei Xi
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yulong Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Bingyuan Yang
- Department of Molecular Physiology & Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Jingzhi Su
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Haokun Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Junyan Jin
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Zhimin Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Yunxia Yang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Xiaoming Zhu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Shouqi Xie
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China; The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China
| | - Dong Han
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China; Hubei Hongshan Laboratory, Wuhan, China.
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4
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Sun H, Kemper JK. MicroRNA regulation of AMPK in nonalcoholic fatty liver disease. Exp Mol Med 2023; 55:1974-1981. [PMID: 37653034 PMCID: PMC10545736 DOI: 10.1038/s12276-023-01072-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/10/2023] [Accepted: 06/13/2023] [Indexed: 09/02/2023] Open
Abstract
Obesity-associated nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease and is the leading cause of liver failure and death. The function of AMP-activated protein kinase (AMPK), a master energy sensor, is aberrantly reduced in NAFLD, but the underlying mechanisms are not fully understood. Increasing evidence indicates that aberrantly expressed microRNAs (miRs) are associated with impaired AMPK function in obesity and NAFLD. In this review, we discuss the emerging evidence that miRs have a role in reducing AMPK activity in NAFLD and nonalcoholic steatohepatitis (NASH), a severe form of NAFLD. We also discuss the underlying mechanisms of the aberrant expression of miRs that can negatively impact AMPK, as well as the therapeutic potential of targeting the miR-AMPK pathway for NAFLD/NASH.
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Affiliation(s)
- Hao Sun
- Department of Molecular and Integrative Physiology, School of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Jongsook Kim Kemper
- Department of Molecular and Integrative Physiology, School of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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Afsharmanesh MR, Mohammadi Z, Mansourian AR, Jafari SM. A Review of micro RNAs changes in T2DM in animals and humans. J Diabetes 2023; 15:649-664. [PMID: 37329278 PMCID: PMC10415875 DOI: 10.1111/1753-0407.13431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 04/22/2023] [Accepted: 05/24/2023] [Indexed: 06/19/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) and its associated complications have become a crucial public health concern in the world. According to the literature, chronic inflammation and the progression of T2DM have a close relationship. Accumulated evidence suggests that inflammation enhances the insulin secretion lost by islets of Langerhans and the resistance of target tissues to insulin action, which are two critical features in T2DM development. Based on recently highlighted research that plasma concentration of inflammatory mediators such as tumor necrosis factor α and interleukin-6 are elevated in insulin-resistant and T2DM, and it raises novel question marks about the processes causing inflammation in both situations. Over the past few decades, microRNAs (miRNAs), a class of short, noncoding RNA molecules, have been discovered to be involved in the regulation of inflammation, insulin resistance, and T2DM pathology. These noncoding RNAs are specifically comprised of RNA-induced silencing complexes and regulate the expression of specific protein-coding genes through various mechanisms. There is extending evidence that describes the expression profile of a special class of miRNA molecules altered during T2DM development. These modifications can be observed as potential biomarkers for the diagnosis of T2DM and related diseases. In this review study, after reviewing the possible mechanisms involved in T2DM pathophysiology, we update recent information on the miRNA roles in T2DM, inflammation, and insulin resistance.
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Affiliation(s)
- Mohammad Reza Afsharmanesh
- Metabolic Disorders Research CenterGolestan University of Medical SciencesGorganIran
- Department of Biochemistry and Biophysics, School of MedicineGolestan University of Medical SciencesGorganIran
| | - Zeinab Mohammadi
- Metabolic Disorders Research CenterGolestan University of Medical SciencesGorganIran
- Department of Biochemistry and Biophysics, School of MedicineGolestan University of Medical SciencesGorganIran
| | - Azad Reza Mansourian
- Metabolic Disorders Research CenterGolestan University of Medical SciencesGorganIran
- Department of Biochemistry and Biophysics, School of MedicineGolestan University of Medical SciencesGorganIran
| | - Seyyed Mehdi Jafari
- Metabolic Disorders Research CenterGolestan University of Medical SciencesGorganIran
- Department of Biochemistry and Biophysics, School of MedicineGolestan University of Medical SciencesGorganIran
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Song Q, Guo JX, Ma YX, Ou T, Zhang J, Li HZ, Mi SQ, Zhang YZ, Oda H, Chen W. Taurine alleviated hepatic steatosis in oleic acid-treated-HepG2 cells and rats fed a high-fat diet. Heliyon 2023; 9:e16401. [PMID: 37274675 PMCID: PMC10238701 DOI: 10.1016/j.heliyon.2023.e16401] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/21/2023] [Accepted: 05/16/2023] [Indexed: 06/06/2023] Open
Abstract
Taurine has been proven in many trials to alleviate the symptoms of metabolic associated fatty liver disease. Here its protective effect for hepatic steatosis and modulation of AMP-activated protein kinase and insulin signaling pathway were investigated. Steatotic HepG2 cell established with oleic acid (0.05 mmol/L), treated with taurine (5 mmol/L), dorsomorphin (10 μmol/L) for 24 h. Sprague Dawley rats were divided into regular and high-fat diet (HFD) groups, and their corresponding taurine (70 or 350 mg/kg BW/d) groups, fed for 8 weeks. In steatotic cell, taurine reduced the TG concentration and SREBP-1c, PPARγ, FAS, ACC, SCD1 protein levels, decreased phosphorylation of mTOR, IRS1 (Ser302), increased phosphorylation of AMPKα, LKB1, PI3K, Akt, ACC. While dorsomorphin eliminated taurine's TG-lowering effect. In HFD-fed rats, taurine reduced liver TG, serum TG, ALT, AST, IL-1β, IL-4, TNF-α. The effects of taurine on the main factors of fatty acid synthesis were mostly consistent with cell experiments, and the reduction of microRNAs (451, 33, 291b) was aligned with the improvement in LKB1 and AMPK expression in HFD rats. Taurine alleviated steatosis-induced inhibition of IRS1-PI3K-Akt pathway, but suppressed its positively regulated downstream factor mTOR. In parallel, taurine reduced steatosis by activating LKB1-AMPKα pathway via phosphorylation and no-phosphorylation manner, then inhibiting SREBP-1c directly or by suppressing mTOR phosphorylation.
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Affiliation(s)
- Qi Song
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing, 100191, China
- Laboratory of Nutritional Biochemistry, Nagoya University, Nagoya, 464-8601, Japan
| | - Jun Xia Guo
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing, 100191, China
| | - Yu Xun Ma
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing, 100191, China
| | - Tong Ou
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing, 100191, China
| | - Jing Zhang
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing, 100191, China
| | - Hui Zi Li
- Department of Nutrition, PLA Rocket Force Characteristic Medical Center, Beijing, 100088, China
| | - Sheng Quan Mi
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing, 100191, China
| | - Yan Zhen Zhang
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing, 100191, China
| | - Hiroaki Oda
- Laboratory of Nutritional Biochemistry, Nagoya University, Nagoya, 464-8601, Japan
| | - Wen Chen
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing, 100191, China
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Winarto J, Song DG, Pan CH. The Role of Fucoxanthin in Non-Alcoholic Fatty Liver Disease. Int J Mol Sci 2023; 24:ijms24098203. [PMID: 37175909 PMCID: PMC10179653 DOI: 10.3390/ijms24098203] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/27/2023] [Accepted: 05/01/2023] [Indexed: 05/15/2023] Open
Abstract
Chronic liver disease (CLD) has emerged as a leading cause of human deaths. It caused 1.32 million deaths in 2017, which affected men more than women by a two-to-one ratio. There are various causes of CLD, including obesity, excessive alcohol consumption, and viral infection. Among them, non-alcoholic fatty liver disease (NAFLD), one of obesity-induced liver diseases, is the major cause, representing the cause of more than 50% of cases. Fucoxanthin, a carotenoid mainly found in brown seaweed, exhibits various biological activities against NAFLD. Its role in NAFLD appears in several mechanisms, such as inducing thermogenesis in mitochondrial homeostasis, altering lipid metabolism, and promoting anti-inflammatory and anti-oxidant activities. The corresponding altered signaling pathways are the β3-adorenarine receptor (β3Ad), proliferator-activated receptor gamma coactivator (PGC-1), adenosine monophosphate-activated protein kinase (AMPK), peroxisome proliferator-activated receptor (PPAR), sterol regulatory element binding protein (SREBP), nuclear factor kappa B (NF-κB), mitogen-activated protein kinase (MAPK), protein kinase B (AKT), SMAD2/3, and P13K/Akt pathways. Fucoxanthin also exhibits anti-fibrogenic activity that prevents non-alcoholic steatohepatitis (NASH) development.
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Affiliation(s)
- Jessica Winarto
- Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
- Natural Product Informatics Research Center, KIST Gangneung Institute of Natural Products, Gangneung 25451, Republic of Korea
| | - Dae-Geun Song
- Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
- Natural Product Informatics Research Center, KIST Gangneung Institute of Natural Products, Gangneung 25451, Republic of Korea
| | - Cheol-Ho Pan
- Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
- Natural Product Informatics Research Center, KIST Gangneung Institute of Natural Products, Gangneung 25451, Republic of Korea
- Microalgae Ask US Co., Ltd., Gangneung 25441, Republic of Korea
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Sun H, Seok S, Jung H, Kemper B, Kemper JK. Obesity-induced miR-802 directly targets AMPK and promotes nonalcoholic steatohepatitis in mice. Mol Metab 2022; 66:101603. [PMID: 36126896 PMCID: PMC9515436 DOI: 10.1016/j.molmet.2022.101603] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 09/13/2022] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE Obesity-associated nonalcoholic fatty liver disease (NAFLD) is a leading cause of liver failure and death. However, the pathogenesis of NAFLD and its severe form, nonalcoholic steatohepatitis (NASH), is poorly understood. The energy sensor, AMP-activated protein kinase (AMPK), has decreased activity in obesity and NAFLD, but the mechanisms are unclear. Here, we examined whether obesity-induced miR-802 has a role in promoting NASH by targeting AMPK. We also investigated whether miR-802 and AMPK have roles in modulating beneficial therapeutic effects mediated by obeticholic acid (OCA), a promising clinical agent for NASH. METHODS Immunoblotting, luciferase assays, and RNA-protein interaction studies were performed to test whether miR-802 directly targets AMPK. The roles of miR-802 and AMPK in NASH were examined in mice fed a NASH-promoting diet. RESULTS Hepatic miR-802 and AMPK levels were inversely correlated in both NAFLD patients and obese mice. MicroRNA in silico analysis, together with biochemical studies in hepatic cells, suggested that miR-802 inhibits hepatic expression of AMPK by binding to the 3' untranslated regions of both human AMPKα1 and mouse Ampkβ1. In diet-induced NASH mice, OCA treatment reduced hepatic miR-802 levels and improved AMPK activity, ameliorating steatosis, inflammation, and apoptosis, but these OCA-mediated beneficial effects on NASH pathologies, particularly reducing apoptosis, were reversed by overexpression of miR-802 or downregulation of AMPK. CONCLUSIONS These results indicate that miR-802 inhibits AMPK by directly targeting Ampkβ1, promoting NAFLD/NASH in mice. The miR-802-AMPK axis that modulates OCA-mediated beneficial effects on NASH may represent a new therapeutic target.
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Affiliation(s)
| | | | | | | | - Jongsook Kim Kemper
- Corresponding author. Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, 407 S. Goodwin Avenue, Urbana, IL, 61801, USA
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9
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Xie Y, Cao Y, Guo CJ, Guo XY, He YF, Xu QY, Shen F, Pan Q. Profile analysis and functional modeling identify circular RNAs in nonalcoholic fatty liver disease as regulators of hepatic lipid metabolism. Front Genet 2022; 13:884037. [PMID: 36186461 PMCID: PMC9520628 DOI: 10.3389/fgene.2022.884037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 08/08/2022] [Indexed: 11/17/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the leading cause of chronic liver disease, associated with an outcome of hepatic fibrosis/cirrhosis and hepatocellular carcinoma. However, limited exploration of the underlying mechanisms hinders its prevention and treatment. To investigate the mechanisms of epigenetic regulation in NAFLD, the expression profile of circular RNA (circRNA) of rodents in which NAFLD was induced by a high-fat, high-cholesterol (HFHC) diet was studied. Modeling of the circRNA-microRNA (miRNA) -mRNA regulatory network revealed the functional characteristics of NAFLD-specific circRNAs. The targets and effects in the liver of such NAFLD-specific circRNAs were further assessed. Our results uncovered that the downregulation of 28 annotated circRNAs characterizes HFHC diet-induced NAFLD. Among the downregulated circRNAs, long intergenic non-protein coding RNA, P53 induced transcript (LNCPINT) -derived circRNAs (circ_0001452, circ_0001453, and circ_0001454) targeted both miR-466i-3p and miR-669c-3p. Their deficiency in NAFLD abrogated the circRNA-based inhibitory effect on both miRNAs, which further inactivated the AMPK signaling pathway via AMPK-α1 suppression. Inhibition of the AMPK signaling pathway promotes hepatic steatosis, depending on the transcriptional and translational upregulation of lipogenic genes, such as those encoding sterol regulatory element-binding protein 1 (SREBP1) and fatty acid synthase (FASN) in hepatocytes. The levels of LNCPINT-derived circRNAs displayed a negative association with hepatic triglyceride (TG) concentration. These findings suggest that loss of LNCPINT-derived circRNAs may underlie NAFLD via miR-466i-3p- and miR-669c-3p-dependent inactivation of the AMPK signaling pathway.
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Affiliation(s)
- Yang Xie
- Department of Gastroenterology, School of Medicine, Xinhua Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yi Cao
- Department of Pediatric Digestion and Nutrition, School of Medicine, Xinhua Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Can-Jie Guo
- Department of Gastroenterology, School of Medicine, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xing-Ya Guo
- Department of Gastroenterology, School of Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Ya-Fang He
- Department of Pediatric Respiratory, School of Medicine, Xinhua Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Qing-Yang Xu
- Department of Gastroenterology, School of Medicine, Xinhua Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Feng Shen
- Endoscopy Center, School of Medicine, Xinhua Hospital, Shanghai Jiao Tong University, Shanghai, China
- *Correspondence: Feng Shen, ; Qin Pan,
| | - Qin Pan
- Department of Gastroenterology, School of Medicine, Xinhua Hospital, Shanghai Jiao Tong University, Shanghai, China
- Research Center, Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, Shanghai, China
- *Correspondence: Feng Shen, ; Qin Pan,
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10
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Dong X, Zhu S, Liu J, Dong Z, Guan F, Xu A, Zhao J, Ge J. Ameliorating mechanism of nuciferine on high-fat diet-induced dyslipidemia and hepatic steatosis by regulating intestinal absorption and serum extracellular vesicles in rats. J Funct Foods 2022. [DOI: 10.1016/j.jff.2022.105182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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11
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The role of MicroRNA networks in tissue-specific direct and indirect effects of metformin and its application. Biomed Pharmacother 2022; 151:113130. [PMID: 35598373 DOI: 10.1016/j.biopha.2022.113130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/06/2022] [Accepted: 05/13/2022] [Indexed: 11/20/2022] Open
Abstract
Metformin is a first-line oral antidiabetic agent that results in clear benefits in relation to glucose metabolism and diabetes-related complications. The specific regulatory details and mechanisms underlying these benefits are still unclear and require further investigation. There is recent mounting evidence that metformin has pleiotropic effects on the target tissue development in metabolic organs, including adipose tissue, the gastrointestinal tract and the liver. The mechanism of actions of metformin are divided into direct effects on target tissues and indirect effects via non-targeted tissues. MicroRNAs (miRNAs) are a class of endogenous, noncoding, negative gene regulators that have emerged as important regulators of a number of diseases, including type 2 diabetes mellitus (T2DM). Metformin is involved in many aspects of miRNA regulation, and metformin treatment in T2DM should be associated with other miRNA targets. A large number of miRNAs regulation by metformin in target tissues with either direct or indirect effects has gradually been revealed in the context of numerous diseases and has gradually received increasing attention. This paper thoroughly reviews the current knowledge about the role of miRNA networks in the tissue-specific direct and indirect effects of metformin. Furthermore, this knowledge provides a novel theoretical basis and suggests therapeutic targets for the clinical treatment of metformin and miRNA regulators in the prevention and treatment of cancer, cardiovascular disorders, diabetes and its complications.
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12
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Qian G, Morral N. Role of non-coding RNAs on liver metabolism and NAFLD pathogenesis. Hum Mol Genet 2022; 31:R4-R21. [PMID: 35417923 DOI: 10.1093/hmg/ddac088] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/22/2022] [Accepted: 04/08/2022] [Indexed: 11/14/2022] Open
Abstract
Obesity and type 2 diabetes are major contributors to the growing prevalence of non-alcoholic fatty liver disease (NAFLD), a chronic liver condition characterized by accumulation of fat in individuals without a significant amount of alcohol intake. The NAFLD spectrum ranges from simple steatosis (early stages, known as NAFL), to non-alcoholic steatohepatitis (NASH), which can progress to fibrosis and cirrhosis or hepatocellular carcinoma. Obesity, type 2 diabetes, and NAFLD are strongly associated with insulin resistance. In the liver, insulin resistance increases hepatic glucose output, lipogenesis, and VLDL secretion, leading to a combination of hyperglycemia and hypertriglyceridemia. Aberrant gene expression is a hallmark of insulin resistance. Non-coding RNAs (ncRNAs) have emerged as prominent regulators of gene expression that operate at the transcriptional, post-transcriptional, and post-translational levels. In the last couple of decades a wealth of studies have provided evidence that most processes of liver metabolism are orchestrated by ncRNAs. This review focuses on the role of microRNAs, long non-coding RNAs and circular RNAs as coordinators of hepatic function, as well as the current understanding on how their dysregulation contributes to abnormal metabolism and pathophysiology in animal models of insulin resistance and NAFLD. Moreover, ncRNAs are emerging as useful biomarkers that may be able to discriminate between the different stages of NAFLD. The potential of ncRNAs as therapeutic drugs for NAFLD treatment and as biomarkers is discussed.
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Affiliation(s)
- Gene Qian
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN
| | - Núria Morral
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN.,Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN
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13
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Palihaderu PADS, Mendis BILM, Premarathne JMKJK, Dias WKRR, Yeap SK, Ho WY, Dissanayake AS, Rajapakse IH, Karunanayake P, Senarath U, Satharasinghe DA. Potential role of microRNAs in selective hepatic insulin resistance: From paradox to the paradigm. Front Endocrinol (Lausanne) 2022; 13:1028846. [PMID: 36479211 PMCID: PMC9720316 DOI: 10.3389/fendo.2022.1028846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 10/31/2022] [Indexed: 11/22/2022] Open
Abstract
The paradoxical action of insulin on hepatic glucose metabolism and lipid metabolism in the insulin-resistant state has been of much research interest in recent years. Generally, insulin resistance would promote hepatic gluconeogenesis and demote hepatic de novo lipogenesis. The underlying major drivers of these mechanisms were insulin-dependent, via FOXO-1-mediated gluconeogenesis and SREBP1c-mediated lipogenesis. However, insulin-resistant mouse models have shown high glucose levels as well as excess lipid accumulation. As suggested, the inert insulin resistance causes the activation of the FOXO-1 pathway promoting gluconeogenesis. However, it does not affect the SREBP1c pathway; therefore, cells continue de novo lipogenesis. Many hypotheses were suggested for this paradoxical action occurring in insulin-resistant rodent models. A "downstream branch point" in the insulin-mediated pathway was suggested to act differentially on the FOXO-1 and SREBP1c pathways. MicroRNAs have been widely studied for their action of pathway mediation via suppressing the intermediate protein expressions. Many in vitro studies have postulated the roles of hepato-specific expressions of miRNAs on insulin cascade. Thus, miRNA would play a pivotal role in selective hepatic insulin resistance. As observed, there were confirmations and contradictions between the outcomes of gene knockout studies conducted on selective hepatic insulin resistance and hepato-specific miRNA expression studies. Furthermore, these studies had evaluated only the effect of miRNAs on glucose metabolism and few on hepatic de novo lipogenesis, limiting the ability to conclude their role in selective hepatic insulin resistance. Future studies conducted on the role of miRNAs on selective hepatic insulin resistance warrant the understanding of this paradoxical action of insulin.
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Affiliation(s)
| | | | | | | | - Swee Keong Yeap
- China-ASEAN College of Marine Sciences, Xiamen University Malaysia, Sepang, Selangor, Malaysia
| | - Wan Yong Ho
- Faculty of Sciences and Engineering, University of Nottingham Malaysia, Semenyih, Malaysia
| | | | | | - Panduka Karunanayake
- Department of Clinical Medicine, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Upul Senarath
- Department of Community Medicine, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Dilan Amila Satharasinghe
- Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Peradeniya, Sri Lanka
- *Correspondence: Dilan Amila Satharasinghe,
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Gallic Acid Improves Diabetic Steatosis by Downregulating MicroRNA-34a-5p through Targeting NFE2L2 Expression in High-Fat Diet-Fed db/db Mice. Antioxidants (Basel) 2021; 11:antiox11010092. [PMID: 35052597 PMCID: PMC8773012 DOI: 10.3390/antiox11010092] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/24/2021] [Accepted: 12/28/2021] [Indexed: 12/18/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) has become epidemic worldwide and is strongly associated with nonalcoholic fatty liver disease (NAFLD). The molecular mechanisms of microRNAs in NAFLD and T2DM development and the corresponding therapies remain unclear. We performed microRNA microarray validation to determine whether hepatic miR-34a-5p was significantly upregulated in db/db mice fed with a high-fat diet (HFD), a mouse model of T2DM with steatohepatitis. The potential role of miR-34a-5p and gallic acid (GA) in regulating hepatic lipid metabolism and diabetic steatosis was explored. GA improved the activities of antioxidant enzymes and suppressed lipid accumulation in the HFD-induced steatotic liver of db/db mice. In vitro, the silencing of miR-34a-5p in hepatocyte HepG2 cells ameliorated high glucose + oleic acid/palmitic acid mixture–induced accumulation of cellular triglycerides. We identified nuclear factor erythroid-derived 2-like 2 (NFE2L2) as a direct target of miR-34a-5p. Reduction in intracellular triglyceride and the expression levels of sterol regulatory element-binding protein 1 and fatty acid synthase by GA were mediated by the inhibition of miR-34a-5p expression in HepG2 cells. The findings suggest that GA improves hepatic lipogenesis by downregulating miR-34a-5p by suppressing NFE2L2 expression, indicating the potential therapeutic role of GA or an NFE2L2-activating agent in diabetic fatty liver disease.
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15
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Alimoradi N, Firouzabadi N, Fatehi R. Metformin and insulin-resistant related diseases: Emphasis on the role of microRNAs. Biomed Pharmacother 2021; 139:111662. [PMID: 34243629 DOI: 10.1016/j.biopha.2021.111662] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/16/2021] [Accepted: 04/22/2021] [Indexed: 12/14/2022] Open
Abstract
Metformin is one of the most prescribed drugs in type II diabetes (T2DM) which has recently found new applications in the prevention and treatment of various illnesses, from metabolic disorders to cardiovascular and age-related diseases. Metformin improves insulin resistance (IR) by modulating metabolic mechanisms and mitochondrial biogenesis. Alternation of microRNAs (miRs) in the treatment of IR-related illnesses has been observed by metformin therapy. MiRs are small non-coding RNAs that play important roles in RNA silencing, targeting the 3'untranslated region (3'UTR) of most mRNAs and inhibiting the translation of related proteins. As a result, their dysregulation is associated with many diseases. Metformin may alter miRs levels in the treatment of various diseases by AMPK-dependent or AMPK-independent mechanisms. Here, we summarized the therapeutic role of metformin by modifying the aberrant expression of miRs as potential biomarkers or therapeutic targets in diseases in which IR plays a key role.
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Affiliation(s)
- Nahid Alimoradi
- Department of Pharmacology & Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Negar Firouzabadi
- Department of Pharmacology & Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Reihaneh Fatehi
- Department of Pharmacology & Toxicology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
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16
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Zhao S, Liu X, Kang J, Sun S, Li Y, Zhang J, Li Q, Ji X. Analysis of microRNA expression in cerebral ischemia/reperfusion after mild therapeutic hypothermia treatment in rats. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:168. [PMID: 33569470 PMCID: PMC7867934 DOI: 10.21037/atm-21-143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background This study aimed to explore the molecular mechanism of mild hypothermia in in the treatment of cerebral ischemia, microRNA (miRNA) microarrays and bioinformatics analysis were employed to examine the miRNA expression profiles of rats with mild therapeutic hypothermia after middle cerebral artery occlusion (MCAO). Methods MCAO was induced in Male Sprague–Dawley rats. Mild hypothermia treatment began from the onset of ischemia and maintained for 3 hours. miRNA expressions following focal cerebral ischemia and mild hypothermia treatment were profiled using microarray technology. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) were used to analyze the functions of the target genes in mild therapeutic hypothermia after MCAO. 60 min before MCAO, mimics and inhibitor of miR-291b were injected into the right lateral ventricle respectively, then the infarct volume and neuronal apoptosis were analyzed. Results Six upregulated miRNAs and 6 downregulated miRNAs were detected 4 hours after mild therapeutic hypothermia, and after 24 hours, 41 and 10 miRNAs were upregulated and downregulated, respectively. The target genes of the differentially expressed genes were mainly related with multicellular organism development and the mucin type O-glycan biosynthesis pathway was the most enriched KEGG pathway. Among the differentially expressed miRNAs, miR-291b was selected to assess the effects of mild therapeutic hypothermia in MCAO rats. At 24 hours after mild therapeutic hypothermia, miR-291b overexpression was proved to exhibit neuroprotective effects. Conclusions The results showed that miRNAs might play a pivotal role in mild therapeutic hypothermia in cerebral ischemia/reperfusion injury. Further understanding of the mechanism and function of miRNAs would help to illuminate the mechanism of mild therapeutic hypothermia in cerebral ischemia/reperfusion injury.
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Affiliation(s)
- Shangfeng Zhao
- Department of Neurosurgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Xiangrong Liu
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jun Kang
- Department of Neurosurgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Si Sun
- Department of Neurosurgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Yong Li
- Department of Neurosurgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Jialiang Zhang
- Department of Neurosurgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Qi Li
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xunming Ji
- Department of Neurosurgery, Xuanwu Hospital of Capital Medical University, Beijing, China
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Maniyadath B, Sandra US, Kolthur-Seetharam U. Metabolic choreography of gene expression: nutrient transactions with the epigenome. J Biosci 2020. [DOI: 10.1007/s12038-019-9987-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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18
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Maniyadath B, Sandra US, Kolthur-Seetharam U. Metabolic choreography of gene expression: nutrient transactions with the epigenome. J Biosci 2020; 45:7. [PMID: 31965985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Eukaryotic complexity and thus their ability to respond to diverse cues are largely driven by varying expression of gene products, qualitatively and quantitatively. Protein adducts in the form of post-translational modifications, most of which are derived from metabolic intermediates, allow fine tuning of gene expression at multiple levels. With the advent of high-throughput and high-resolution mapping technologies there has been an explosion in terms of the kind of modifications on chromatin and other factors that govern gene expression. Moreover, even the classical notion of acetylation and methylation dependent regulation of transcription is now known to be intrinsically coupled to biochemical pathways, which were otherwise regarded as 'mundane'. Here we have not only reviewed some of the recent literature but also have highlighted the dependence of gene regulatory mechanisms on metabolic inputs, both direct and indirect. We have also tried to bring forth some of the open questions, and how our understanding of gene expression has changed dramatically over the last few years, which has largely become metabolism centric. Finally, metabolic regulation of epigenome and gene expression has gained much traction due to the increased incidence of lifestyle and age-related diseases.
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Affiliation(s)
- Babukrishna Maniyadath
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India
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19
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Zhang L, Wu K, Bo T, Zhou L, Gao L, Zhou X, Chen W. Integrated microRNA and proteome analysis reveal a regulatory module in hepatic lipid metabolism disorders in mice with subclinical hypothyroidism. Exp Ther Med 2019; 19:897-906. [PMID: 32010250 PMCID: PMC6966133 DOI: 10.3892/etm.2019.8281] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 11/11/2019] [Indexed: 12/12/2022] Open
Abstract
Subclinical hypothyroidism (SCH) is becoming a global health problem due to its increasing prevalence and potential adverse effects, including cardiovascular diseases and nonalcoholic fatty liver disease (NAFLD). However, the association between SCH and NAFLD remains controversial. MicroRNAs (miRNAs/miRs) have been reported to be implicated in lipid metabolism disorders; however, how miRNAs regulate hepatic lipid metabolism in SCH mice remains unknown. The present study investigated miRNA alterations and proteome profiles in an SCH mouse model, which was generated by methimazole administration in mice for 16 weeks. Next, the profiles of 17 miRNAs that are critical to hepatic lipid metabolism and the proteome were investigated using reverse transcription-quantitative polymerase chain reaction and iTRAQ labeling in the liver specimens of SCH (n=9) and control (n=7) mice. Putative target prediction of miRNAs was also conducted using TargetScan and miRanda. Compared with the control mice, SCH mice had 8 miRNAs and 36 proteins with significantly different expression in the liver tissues. Furthermore, a regulatory module containing 3 miRNAs (miR-34a-5p, miR-24-3p and miR-130a-3p) and 4 proteins (thioredoxin, selenium-binding protein 2, elongation factor 1β and prosaposin) was identified. Overall, integrated analysis of miRNAs and the proteome highlighted a regulatory module between miRNAs and proteins, which, to a certain extent, may contribute to a better understanding of hepatic lipid metabolism disorders in SCH mice.
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Affiliation(s)
- Liya Zhang
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China.,Shandong Provincial Key Laboratory of Endocrinology and Lipid Metabolism, Shandong Academy of Clinical Medicine, Jinan, Shandong 250021, P.R. China.,Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, Jinan, Shandong 250021, P.R. China
| | - Kunpeng Wu
- Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, Jinan, Shandong 250021, P.R. China.,Department of Hematology, Huashan Hospital, Fudan University, Shanghai 200040, P.R. China
| | - Tao Bo
- Scientific Center, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Lingyan Zhou
- Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, Jinan, Shandong 250021, P.R. China.,Department of Endocrinology and Metabolism, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Ling Gao
- Shandong Provincial Key Laboratory of Endocrinology and Lipid Metabolism, Shandong Academy of Clinical Medicine, Jinan, Shandong 250021, P.R. China.,Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, Jinan, Shandong 250021, P.R. China.,Scientific Center, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Xiaoming Zhou
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China.,Shandong Provincial Key Laboratory of Endocrinology and Lipid Metabolism, Shandong Academy of Clinical Medicine, Jinan, Shandong 250021, P.R. China.,Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, Jinan, Shandong 250021, P.R. China
| | - Wenbin Chen
- Scientific Center, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
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20
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Meng Z, Liu Q, Sun F, Qiao L. Hepatitis C virus nonstructural protein 5A perturbs lipid metabolism by modulating AMPK/SREBP-1c signaling. Lipids Health Dis 2019; 18:191. [PMID: 31684957 PMCID: PMC6829953 DOI: 10.1186/s12944-019-1136-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 10/20/2019] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Steatosis is an important clinical manifestation associated with chronic hepatitis C virus (HCV) infection. AMP-activated protein kinase (AMPK), a major mediator of lipid metabolism, regulates HCV-associated hepatic steatosis, but the underlying mechanisms remain obscure. Here we investigated the mechanism of HCV nonstructural protein 5A (NS5A)-induced lipid accumulation by the AMPK/SREBP-1c pathway. METHODS We generated model mice by injecting recombinant lentiviral particles expressing the NS5A protein (genotype 3a) via the tail vein. The serum levels of alanine aminotransferase (ALT), free fatty acids (FFAs) and triglycerides (TG) were examined. H&E and Oil Red O staining were used to examine lipid droplets. Immunohistochemistry staining, quantitative real-time PCR and Western blotting were used to determine the expression of lipogenic genes. RESULTS Our results showed that the serum levels of ALT, FFAs and TG, as well as the accumulation of hepatic lipid droplets, were increased significantly in mice infected with NS5A-expressing lentiviral particles. NS5A inhibited AMPK phosphorylation and increased the expression levels of sterol regulatory element binding protein-1c (SREBP-1c), acetyl-coenzyme A carboxylase 1 (ACC1) and fatty acid synthase (FASN) in vivo and in vitro. Further investigation revealed that pharmacological activation or ectopic expression of AMPK neutralized the upregulation of SREBP-1c, ACC1 and FASN, and ameliorated hepatic lipid accumulation induced by NS5A. Ectopic expression of SREBP-1c enhanced NS5A-induced hepatic lipid accumulation, which was dramatically reversed by pharmacological activation of AMPK. CONCLUSIONS Collectively, we demonstrate that NS5A induces hepatic lipid accumulation via the AMPK/SREBP-1c pathway.
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Affiliation(s)
- Ziyu Meng
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin, 300134, China
| | - Qiang Liu
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), School of Public Health Vaccinology and Immunotherapeutics, Department of Veterinary Microbiology, University of Saskatchewan, S7N5E3, Saskatoon, Canada
| | - Fujun Sun
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin, 300134, China
| | - Ling Qiao
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin, 300134, China.
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Chen T, Zhang Y, Liu Y, Zhu D, Yu J, Li G, Sun Z, Wang W, Jiang H, Hong Z. MiR-27a promotes insulin resistance and mediates glucose metabolism by targeting PPAR-γ-mediated PI3K/AKT signaling. Aging (Albany NY) 2019; 11:7510-7524. [PMID: 31562809 PMCID: PMC6781997 DOI: 10.18632/aging.102263] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 09/02/2019] [Indexed: 04/18/2023]
Abstract
This study aimed to establish a high-fat diet (HFD)-fed obese mouse model and a cell culture model of insulin resistance (IR) in mature 3T3-L1 adipocytes. A dual-luciferase reporter assay (DLRA) was confirmed interaction between miR-27a and the 3'-untranslated region (UTR) of Peroxisome proliferator-activated receptor (PPAR)-γ. The inhibition of PPAR-γ expression by microRNA (miR)-27a in IR cells at both the protein and mRNA levels was confirmed by a mechanistic investigation. Moreover, the 3'-UTR of PPAR-γ was found to be a direct target of miR-27a, based on the DLRA. Furthermore, antagomiR-27a upregulated the activation of PI3K/Akt signaling and glucose transporter type 4 (GLUT4) expression at the protein and mRNA levels. Additionally, the PPAR inhibitor T0070907 repressed the insulin sensitivity upregulated by antagomiR-27a, which was accompanied by the inhibition of PPAR-γ expression and increased levels of AKT phosphorylation and GLUT4. The PI3K inhibitor wortmannin reduced miR-27a-induced increases in AKT phosphorylation, glucose uptake, and GLUT4. miR-27a is considered to be involved in the PPAR-γ-PI3K/AKT-GLUT4 signaling axis, thus leading to increased glucose uptake and decreased IR in HFD-fed mice and 3T3-L1 adipocytes. Therefore, miR-27a is a novel target for the treatment of IR in obesity and diabetes.
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Affiliation(s)
- Tianbao Chen
- Department of Cardiology, The First Affiliated Hospital of Quanzhou, Fujian Medical University, Quanzhou, Fujian, China
| | - Yi Zhang
- Department of Endocrinology, The First Affiliated Hospital of Quanzhou, Fujian Medical University, Quanzhou, Fujian, China
| | - Yilan Liu
- Department of Endocrinology, The First Affiliated Hospital of Quanzhou, Fujian Medical University, Quanzhou, Fujian, China
| | - Dexiao Zhu
- Department of Cardiology, The First Affiliated Hospital of Quanzhou, Fujian Medical University, Quanzhou, Fujian, China
| | - Jing Yu
- Department of Endocrinology, The First Affiliated Hospital of Quanzhou, Fujian Medical University, Quanzhou, Fujian, China
| | - Guoqian Li
- Department of Cardiology, The First Affiliated Hospital of Quanzhou, Fujian Medical University, Quanzhou, Fujian, China
| | - Zhichun Sun
- Department of Endocrinology, The First Affiliated Hospital of Quanzhou, Fujian Medical University, Quanzhou, Fujian, China
| | - Wanru Wang
- Department of Cardiology, The First Affiliated Hospital of Quanzhou, Fujian Medical University, Quanzhou, Fujian, China
| | - Hongwei Jiang
- Department of Endocrinology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan, China
| | - Zhenzhen Hong
- Department of Endocrinology, The First Affiliated Hospital of Quanzhou, Fujian Medical University, Quanzhou, Fujian, China
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22
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Tang W, Fan Y. SIRT6 as a potential target for treating insulin resistance. Life Sci 2019; 231:116558. [PMID: 31194993 DOI: 10.1016/j.lfs.2019.116558] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 06/04/2019] [Accepted: 06/10/2019] [Indexed: 12/26/2022]
Abstract
AIMS We aimed to explore the role of SIRT6 in Insulin resistance (IR). We are the first to investigate on this crucial relationship in an obese mouse model fed on a high-fat diet (HFD) and an IR model based on the mature 3T3-L1-derived adipocytes. MAIN METHODS Western blotting (WB) and qPCR analysis were performed to evaluate the SIRT6 protein and mRNA expressions in HFD mice as well as IR cells. Injection of adenovirus encoding SIRT6 gene in HFD mice and transfection of pcDNA3-SIRT6 in IR cells increased the glucose uptake levels and insulin sensitivity. KEY FINDINGS The positive regulatory effects of SIRT6 on transient receptor potential vallinoid 1 (TRPV1) in IR cells were confirmed by a mechanistic investigation at both protein and mRNA levels. Further, the overexpression of SIRT6 was found to activate the TRPV1/Calcitonin gene-related peptide (CGRP) signaling and upregulate the glucose transporter (GLUT) expression at protein and mRNA levels. Additionally, administration of the TRPV1 antagonist, SB-705498 repressed the insulin sensitivity upregulated by SIRT6 overexpression accompanied with the inhibition of CGRP and decrease in GLUT proportions. The results also showed that TRPV1 agonist, Capsaicin boosted the SIRT6-induced glucose uptake, CGRP production, and GLUT4 levels. SIGNIFICANCE Overall, SIRT6 was concluded to be involved in the TRPV1-CGRP-GLUT4 signaling axis thus leading to increased glucose uptake and decreased IR in HFD mice and 3T3-L1 adipocytes. Therefore, in terms of obesity and diabetes, SIRT6 is a novel candidate for treating IR.
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Affiliation(s)
- Wei Tang
- Department of Endocrinology, Zhoukou Central Hospital, Zhoukou, Henan, China.
| | - Yingying Fan
- Department of Endocrinology, Zhoukou Central Hospital, Zhoukou, Henan, China
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Yin W, Zhang W, Zhu Y, Ni H, Gong L, Fu M. miR-219-3p regulates the occurrence of hepatic fibrosis by targeting Smad2. Exp Ther Med 2019; 17:4635-4642. [PMID: 31086594 DOI: 10.3892/etm.2019.7480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 02/05/2019] [Indexed: 11/09/2022] Open
Abstract
Abnormal expression of microRNA (miR)-219-3p has been widely identified in different tumors. However, whether miR-219-3p is involved in the progression of hepatic fibrosis (HF) has never been explored. The present study showed that compared with healthy controls, the levels of miR-291-3p in peripheral blood were decreased in patients with HF. Furthermore, much lower levels of miR-291-3p were identified in fibrotic liver tissues compared with that of normal liver tissues. Receiver operating characteristic curve analysis showed that the levels of miR-291-3p in peripheral blood may screen patients with HF from healthy controls. Reverse transcription quantitative polymerase chain reaction analysis showed that overexpression of miR-291-3p significantly suppressed the mRNA levels of Snai1, vascular endothelial-specific cadherin (VE-cadherin), Vimentin, transforming growth factor (TGF)-β1, and glial fibrillary acidic protein (GFAP). The protein levels of Snai1, VE-cadherin, Vimentin, TGF-β1, and GFAP were also decreased in hepatic stellate cells transfected with miR-291-3p mimics. Further study indicated that mothers against decapentaplegic homolog 2 (Smad2) was a target gene of miR-291-3p. More importantly, silencing of Smad2 could abolish miR-291-3p inhibition-induced TGF-β1 signaling activation. In summary, reduced peripheral blood miR-291-3p may be involved in the progression of HF via targeting Smad2.
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Affiliation(s)
- Weihua Yin
- Department of Infectious Diseases, The First People's Hospital of Kunshan Affiliated with Jiangsu University, Suzhou, Jiangsu 215000, P.R. China
| | - Wei Zhang
- Department of Infectious Diseases, The First People's Hospital of Kunshan Affiliated with Jiangsu University, Suzhou, Jiangsu 215000, P.R. China
| | - Yanfang Zhu
- Department of Infectious Diseases, The First People's Hospital of Kunshan Affiliated with Jiangsu University, Suzhou, Jiangsu 215000, P.R. China
| | - Huihui Ni
- Department of Infectious Diseases, The First People's Hospital of Kunshan Affiliated with Jiangsu University, Suzhou, Jiangsu 215000, P.R. China
| | - Li Gong
- Department of Infectious Diseases, The First People's Hospital of Kunshan Affiliated with Jiangsu University, Suzhou, Jiangsu 215000, P.R. China
| | - Maoying Fu
- Department of Infectious Diseases, The First People's Hospital of Kunshan Affiliated with Jiangsu University, Suzhou, Jiangsu 215000, P.R. China
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Suksangrat T, Phannasil P, Jitrapakdee S. miRNA Regulation of Glucose and Lipid Metabolism in Relation to Diabetes and Non-alcoholic Fatty Liver Disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1134:129-148. [DOI: 10.1007/978-3-030-12668-1_7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Torres JL, Novo-Veleiro I, Manzanedo L, Alvela-Suárez L, Macías R, Laso FJ, Marcos M. Role of microRNAs in alcohol-induced liver disorders and non-alcoholic fatty liver disease. World J Gastroenterol 2018; 24:4104-4118. [PMID: 30271077 PMCID: PMC6158486 DOI: 10.3748/wjg.v24.i36.4104] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 06/25/2018] [Accepted: 06/27/2018] [Indexed: 02/06/2023] Open
Abstract
MicroRNAs (miRNAs) are small non-coding RNAs that regulate multiple physiological and pathological functions through the modulation of gene expression at the post-transcriptional level. Accumulating evidence has established a role for miRNAs in the development and pathogenesis of liver disease. Specifically, a large number of studies have assessed the role of miRNAs in alcoholic liver disease (ALD) and non-alcoholic fatty liver disease (NAFLD), two diseases that share common underlying mechanisms and pathological characteristics. The purpose of the current review is to summarize and update the body of literature investigating the role of miRNAs in liver disease. In addition, the potential use of miRNAs as biomarkers and/or therapeutic targets is discussed. Among all miRNAs analyzed, miR-34a, miR-122 and miR-155 are most involved in the pathogenesis of NAFLD. Of note, these three miRNAs have also been implicated in ALD, reinforcing a common disease mechanism between these two entities and the pleiotropic effects of specific miRNAs. Currently, no single miRNA or panel of miRNAs has been identified for the detection of, or staging of ALD or NAFLD. While promising results have been shown in murine models, no therapeutic based-miRNA agents have been developed for use in humans with liver disease.
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Affiliation(s)
- Jorge-Luis Torres
- Department of Internal Medicine, University Hospital of Salamanca, Institute of Biomedical Research of Salamanca-IBSAL, Salamanca 37007, Spain
- Spanish Working Group on Alcohol and Alcoholism, Spanish Society of Internal Medicine, Madrid 28016, Spain
| | - Ignacio Novo-Veleiro
- Department of Internal Medicine, University Hospital of Santiago de Compostela, A Coruña 15706, Spain
- Spanish Working Group on Alcohol and Alcoholism, Spanish Society of Internal Medicine, Madrid 28016, Spain
| | - Laura Manzanedo
- Department of Internal Medicine, University Hospital of Salamanca, Institute of Biomedical Research of Salamanca-IBSAL, Salamanca 37007, Spain
| | - Lucía Alvela-Suárez
- Department of Internal Medicine, HM Rosaleda Hospital, Santiago de Compostela, A Coruña 15701, Spain
| | - Ronald Macías
- Department of Internal Medicine, University Hospital of Salamanca, Institute of Biomedical Research of Salamanca-IBSAL, Salamanca 37007, Spain
| | - Francisco-Javier Laso
- Department of Internal Medicine, University Hospital of Salamanca, Institute of Biomedical Research of Salamanca-IBSAL, Salamanca 37007, Spain
- Department of Medicine, Faculty of Medicine, University of Salamanca, Salamanca 37007, Spain
- Spanish Working Group on Alcohol and Alcoholism, Spanish Society of Internal Medicine, Madrid 28016, Spain
| | - Miguel Marcos
- Department of Internal Medicine, University Hospital of Salamanca, Institute of Biomedical Research of Salamanca-IBSAL, Salamanca 37007, Spain
- Department of Medicine, Faculty of Medicine, University of Salamanca, Salamanca 37007, Spain
- Spanish Working Group on Alcohol and Alcoholism, Spanish Society of Internal Medicine, Madrid 28016, Spain
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Guo J, Fang W, Chen X, Lin Y, Hu G, Wei J, Zhang X, Yang C, Li J. Upstream stimulating factor 1 suppresses autophagy and hepatic lipid droplet catabolism by activating mTOR. FEBS Lett 2018; 592:2725-2738. [PMID: 30054905 PMCID: PMC6175420 DOI: 10.1002/1873-3468.13203] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 07/16/2018] [Accepted: 07/23/2018] [Indexed: 12/16/2022]
Abstract
Previous studies indicate that the transcription factor upstream stimulating factor 1 (USF1) is involved in the regulation of lipid and glucose metabolism. However, the role of USF1 in lipid-induced autophagy remains unknown. Interestingly, we found that USF1 overexpression suppresses autophagy-related gene expression in HepG2 cells. Further assays confirmed that USF1 could transcriptionally activate mTOR expression, thereby suppressing rapamycin-induced autophagy in HepG2 cells. Moreover, pharmacological activation of autophagy with rapamycin decreases the numbers and sizes of lipid droplets (LDs) in HepG2 cells exposed to an oleate/palmitate mixture. Of note, USF1 upregulation decreases colocalization of LDs and autophagosomes. In conclusion, our data provide evidence that USF1 contributes to abnormal lipid accumulation in the liver by suppressing autophagy via regulation of mTOR transcription.
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Affiliation(s)
- Jun Guo
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Weiwei Fang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China.,Department of Blood Transfusion, Cancer Institute/Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xiehui Chen
- Department of Geriatrics Cardiovascular Medicine, Shenzhen Sun Yat-Sen Cardiovascular Hospital, Shenzhen, China
| | - Yajun Lin
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Gang Hu
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Jie Wei
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Xiaoyi Zhang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Chunxiao Yang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Jian Li
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
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Sui X, Yu S, Dou L, Chen X, Li X, Yang J, Su Y, Wang S, Wang F, Li J. miR-291b-3p mediated ROS-induced endothelial cell dysfunction by targeting HUR. Int J Mol Med 2018; 42:2383-2392. [PMID: 30106126 PMCID: PMC6192777 DOI: 10.3892/ijmm.2018.3821] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 08/06/2018] [Indexed: 12/04/2022] Open
Abstract
Endothelial dysfunction is an early marker of atherosclerosis. Previous studies have indicated that microRNA (miR)-291b-3p regulates the metabolism of lipids and glucose in the liver via targeting adenosine monophosphate-activated kinase α1 and transcription factor p65. The present study investigated whether miR-291b-3p mediated H2O2-mediated endothelial dysfunction. The level of apoptosis of EOMA mouse endothelial cells was analyzed by terminal deoxynucleotidyl-transferase-mediated dUTP nick end labelling staining. The mRNA levels of miR-291b-3p, intercellular adhesion molecule-1 (ICAM-1) and vascular adhesion molecule-1 (VCAM-1) were determined by quantitative polymerase chain reaction. The level of phosphorylated extracellular signal-regulated kinase, and levels of B-cell lymphoma 2 (Bcl-2)-associated X protein and Bcl-2 protein were detected by western blot analysis. The treatment of H2O2 induced the apoptosis and increased the mRNA levels of miR-291b-3p, ICAM-1 and VCAM-1 in EOMA cells. It was also demonstrated that the overexpression of miR-291b-3p promoted EOMA cell apoptosis and dysfunction. In contrast, the downregulation of miR-291b-3p rescued the effect of H2O2 on EOMA cell dysfunction. In addition, Hu antigen R (HuR) was identified as a target gene of miR-291b-3p in EOMA cells. The overexpression of HuR reversed the endothelial dysfunction induced by miR-291b-3p mimics. The present study provides novel insight into the critical role of miR-291b-3p on the endothelial dysfunction induced by H2O2. miR-291b-3p may mediate H2O2-induced endothelial dysfunction via targeting HuR.
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Affiliation(s)
- Xiaofang Sui
- Department of Geriatrics, The First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang 154002, P.R. China
| | - Shuqian Yu
- Department of Geriatrics, The First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang 154002, P.R. China
| | - Lin Dou
- The Ministry of Health Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, P.R. China
| | - Xiehui Chen
- Department of Geriatric Cardiovascular Medicine, Shenzhen Sun Yat‑Sen Cardiovascular Hospital, Shenzhen, Guangdong 518112, P.R. China
| | - Xuejie Li
- Department of Geriatrics, Clinical Medical School, Jiamusi University, Jiamusi, Heilongjiang 154002, P.R. China
| | - Jun Yang
- Department of Geriatrics, Clinical Medical School, Jiamusi University, Jiamusi, Heilongjiang 154002, P.R. China
| | - Yanan Su
- Department of Geriatrics, Clinical Medical School, Jiamusi University, Jiamusi, Heilongjiang 154002, P.R. China
| | - Shuyue Wang
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, Jilin, P.R. China
| | - Fengling Wang
- Department of Geriatrics, The First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang 154002, P.R. China
| | - Jian Li
- The Ministry of Health Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, P.R. China
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Bridgeman SC, Ellison GC, Melton PE, Newsholme P, Mamotte CDS. Epigenetic effects of metformin: From molecular mechanisms to clinical implications. Diabetes Obes Metab 2018; 20:1553-1562. [PMID: 29457866 DOI: 10.1111/dom.13262] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 02/13/2018] [Accepted: 02/13/2018] [Indexed: 12/15/2022]
Abstract
There is a growing body of evidence that links epigenetic modifications to type 2 diabetes. Researchers have more recently investigated effects of commonly used medications, including those prescribed for diabetes, on epigenetic processes. This work reviews the influence of the widely used antidiabetic drug metformin on epigenomics, microRNA levels and subsequent gene expression, and potential clinical implications. Metformin may influence the activity of numerous epigenetic modifying enzymes, mostly by modulating the activation of AMP-activated protein kinase (AMPK). Activated AMPK can phosphorylate numerous substrates, including epigenetic enzymes such as histone acetyltransferases (HATs), class II histone deacetylases (HDACs) and DNA methyltransferases (DNMTs), usually resulting in their inhibition; however, HAT1 activity may be increased. Metformin has also been reported to decrease expression of multiple histone methyltransferases, to increase the activity of the class III HDAC SIRT1 and to decrease the influence of DNMT inhibitors. There is evidence that these alterations influence the epigenome and gene expression, and may contribute to the antidiabetic properties of metformin and, potentially, may protect against cancer, cardiovascular disease, cognitive decline and aging. The expression levels of numerous microRNAs are also reportedly influenced by metformin treatment and may confer antidiabetic and anticancer activities. However, as the reported effects of metformin on epigenetic enzymes act to both increase and decrease histone acetylation, histone and DNA methylation, and gene expression, a significant degree of uncertainty exists concerning the overall effect of metformin on the epigenome, on gene expression, and on the subsequent effect on the health of metformin users.
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Affiliation(s)
- Stephanie Claire Bridgeman
- School of Pharmacy and Biomedical Sciences, and Curtin Health Innovation Research Institute, Curtin University, Perth, Western Australia, Australia
| | - Gaewyn Colleen Ellison
- School of Pharmacy and Biomedical Sciences, and Curtin Health Innovation Research Institute, Curtin University, Perth, Western Australia, Australia
| | - Phillip Edward Melton
- School of Pharmacy and Biomedical Sciences, and Curtin Health Innovation Research Institute, Curtin University, Perth, Western Australia, Australia
- Centre for Genetic Origins of Health and Disease, Faculty of Health and Medical Science, The University of Western Australia, Perth, Western Australia, Australia
| | - Philip Newsholme
- School of Pharmacy and Biomedical Sciences, and Curtin Health Innovation Research Institute, Curtin University, Perth, Western Australia, Australia
| | - Cyril Desire Sylvain Mamotte
- School of Pharmacy and Biomedical Sciences, and Curtin Health Innovation Research Institute, Curtin University, Perth, Western Australia, Australia
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29
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Miao C, Xie Z, Chang J. Critical Roles of microRNAs in the Pathogenesis of Fatty Liver: New Advances, Challenges, and Potential Directions. Biochem Genet 2018; 56:423-449. [PMID: 29951838 DOI: 10.1007/s10528-018-9870-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 06/20/2018] [Indexed: 12/17/2022]
Abstract
In this review, we summarize the current understanding of microRNA (miRNA)-mediated modulation of the gene expression in the fatty liver as well as related signaling pathways. Because of the breadth and diversity of miRNAs, miRNAs may have a very wide variety of biological functions, and much evidence has confirmed that miRNAs are involved in the pathogenesis of fatty liver. In the pathophysiological mechanism of fatty liver, miRNAs may be regulated by upstream regulators, and have their own regulatory targets. miRNAs display important roles in the pathological mechanisms of alcoholic liver disease and non-alcoholic fatty liver disease. At present, most of the miRNA studies are focused on cell and tissue levels, and in vivo studies will help us elucidate the regulation of miRNAs and help us evaluate the potential of miRNAs as diagnostic markers and therapeutic targets. Furthermore, there is evidence that miRNAs are involved in the mechanism of natural medicine treatment in fatty liver. Given the important roles of miRNAs in the pathogenesis of fatty liver, we predict that studies of miRNAs in the pathogenesis of fatty liver will contribute to the elucidation of fatty liver pathology and the treatment of fatty liver patients.
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Affiliation(s)
- Chenggui Miao
- Department of Pharmacy, School of Life and Health Science, Anhui Science and Technology University, Fengyang, 233100, China
| | - Zhongwen Xie
- State Key Laboratory of Tea Biochemistry and Biotechnology, School of Science and Technology of Tea and Food, Anhui Agricultural University, No. 130, Changjiang West Road, Hefei, 230036, Anhui, China.
| | - Jun Chang
- Fourth Affiliated Hospital, Anhui Medical University, Hefei, 230032, China
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30
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Chen T, Yan D, Cheng X, Ji X, Bian J, Yin W. miR-1224-5p Enhances Hepatic Lipogenesis by Targeting Adenosine Monophosphate-Activated Protein Kinase α1 in Male Mice. Endocrinology 2018; 159:2008-2021. [PMID: 29474539 DOI: 10.1210/en.2017-03231] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 02/15/2018] [Indexed: 02/07/2023]
Abstract
MicroRNAs are potential therapeutic targets for metabolic diseases. Here, miR-1224-5p was highly expressed in the livers of mice fed a high-fat diet (HFD) and in obese (ob/ob) mice. To examine the potential role of miR-1224-5p, we constructed liver-specific adenoviral vectors expressing either an miR-1224-5p inhibitor sequence or miR-1224-5p mimic sequences. After tail-vein vector injection, HFD-fed mice were examined for expression of lipogenic genes. We found that miR-1224-5p inhibitors significantly attenuated hepatic lipogenesis and steatosis in HFD-fed mice, whereas miR-1224-5p mimicked promoted lipid accumulation in the liver of chow-fed C57BL/6 mice. Additional in vitro studies demonstrated that downregulation of miR-1224-5p in HepG2 and primary hepatocytes led to a reduction of cellular triglycerides after treatment with an oleic acid and palmitic acid mixture. Importantly, this study also identified adenosine monophosphate-activated protein kinase (AMPK)-α1 as a direct target of miR-1224-5p. miR-1224-5p binding to the 3' untranslated region of AMPKα1 suppressed expression of the AMPKα1 protein and its downstream molecules. Metformin, an activator of AMPK, also inhibited hepatic expression of miR-1224-5p. Together, these findings indicate that miR-1224-5p promotes hepatic lipogenesis by suppressing AMPKα1 expression and suggest that miR-1224-5p inhibitors warrant further investigation as potential therapeutic tools in the treatment of nonalcoholic fatty liver disease.
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Affiliation(s)
- Tianxing Chen
- The State Key Laboratory of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, China
| | - Dong Yan
- Department of Cardiology, Affiliated Hospital of Nanjing University of TCM, Nanjing, China
| | - Xiaoying Cheng
- The State Key Laboratory of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, China
| | - XiaoJun Ji
- The State Key Laboratory of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, China
| | - Jinjun Bian
- Department of Anesthesiology and Critical Care, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Wu Yin
- The State Key Laboratory of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory of Pediatric Respiratory Disease, Nanjing University of Chinese Medicine, Nanjing, China
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
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31
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Saikia P, Roychowdhury S, Bellos D, Pollard KA, McMullen MR, McCullough RL, McCullough AJ, Gholam P, de la Motte C, Nagy LE. Hyaluronic acid 35 normalizes TLR4 signaling in Kupffer cells from ethanol-fed rats via regulation of microRNA291b and its target Tollip. Sci Rep 2017; 7:15671. [PMID: 29142263 PMCID: PMC5688113 DOI: 10.1038/s41598-017-15760-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 11/02/2017] [Indexed: 02/06/2023] Open
Abstract
TLR4 signaling in hepatic macrophages is increased after chronic ethanol feeding. Treatment of hepatic macrophages after chronic ethanol feeding with small-specific sized hyaluronic acid 35 (HA35) normalizes TLR4 signaling; however, the mechanisms for HA35 action are not completely understood. Here we used Next Generation Sequencing of microRNAs to identify negative regulators of TLR4 signaling reciprocally modulated by ethanol and HA35 in hepatic macrophages. Eleven microRNAs were up-regulated by ethanol; only 4 microRNAs, including miR291b, were decreased by HA35. Bioinformatics analysis identified Tollip, a negative regulator of TLR4, as a target of miR291b. Tollip expression was decreased in hepatic macrophages from ethanol-fed rats, but treatment with HA35 or transfection with a miR291b hairpin inhibitor restored Tollip expression and normalized TLR4-stimulated TNFα expression. In peripheral blood monocytes isolated from patients with alcoholic hepatitis, expression of TNFα mRNA was robustly increased in response to challenge with lipopolysaccharide. Importantly, pre-treatment with HA35 reduced TNFα expression by more than 50%. Taken together, we have identified miR291b as a critical miRNA up-regulated by ethanol. Normalization of the miR291b → Tollip pathway by HA35 ameliorated ethanol-induced sensitization of TLR4 signaling in macrophages/monocytes, suggesting that HA35 may be a novel therapeutic agent in the treatment of ALD.
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Affiliation(s)
- Paramananda Saikia
- Center for Liver Disease Research, Department of Pathobiology, Cleveland, OH, USA
- Department of Molecular Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Sanjoy Roychowdhury
- Center for Liver Disease Research, Department of Pathobiology, Cleveland, OH, USA
- Department of Molecular Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Damien Bellos
- Center for Liver Disease Research, Department of Pathobiology, Cleveland, OH, USA
- Department of Molecular Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Katherine A Pollard
- Center for Liver Disease Research, Department of Pathobiology, Cleveland, OH, USA
| | - Megan R McMullen
- Center for Liver Disease Research, Department of Pathobiology, Cleveland, OH, USA
| | - Rebecca L McCullough
- Center for Liver Disease Research, Department of Pathobiology, Cleveland, OH, USA
| | - Arthur J McCullough
- Center for Liver Disease Research, Department of Pathobiology, Cleveland, OH, USA
- Departments of Gastroenterology and Hepatology, Cleveland Clinic, Cleveland, OH, USA
| | - Pierre Gholam
- Department of Gastroenterology and Hepatology, University Hospital, Cleveland, OH, USA
| | - Carol de la Motte
- Center for Liver Disease Research, Department of Pathobiology, Cleveland, OH, USA
- Department of Molecular Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Laura E Nagy
- Center for Liver Disease Research, Department of Pathobiology, Cleveland, OH, USA.
- Departments of Gastroenterology and Hepatology, Cleveland Clinic, Cleveland, OH, USA.
- Department of Molecular Medicine, Case Western Reserve University, Cleveland, OH, USA.
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circRNA_0046367 Prevents Hepatoxicity of Lipid Peroxidation: An Inhibitory Role against Hepatic Steatosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:3960197. [PMID: 29018509 PMCID: PMC5605923 DOI: 10.1155/2017/3960197] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 06/26/2017] [Accepted: 07/06/2017] [Indexed: 12/20/2022]
Abstract
Hepatic steatosis reflects the miRNA-related pathological disorder with triglyceride accumulation and lipid peroxidation, which leads to nonalcoholic steatohepatitis, liver fibrosis/cirrhosis, and even hepatocellular carcinoma. Circular RNA (circRNA)/miRNA interaction reveals a novel layer of epigenetic regulation, yet the miRNA-targeting circRNA remains uncertain in hepatic steatosis. Here, we uncover circRNA_0046367 to be endogenous modulator of miR-34a that underlies hepatic steatosis. In contrast to its expression loss during the hepatocellular steatosis in vivo and in vitro, circRNA_0046367 normalization abolished miR-34a's inhibitory effect on peroxisome proliferator-activated receptor α (PPARα) via blocking the miRNA/mRNA interaction with miRNA response elements (MREs). PPARα restoration led to the transcriptional activation of genes associated with lipid metabolism, including carnitine palmitoyltransferase 2 (CPT2) and acyl-CoA binding domain containing 3 (ACBD3), and then resulted in the steatosis resolution. Hepatotoxicity of steatosis-related lipid peroxidation, being characterized by mitochondrial dysfunction, growth arrest, and apoptosis, is resultantly prevented after the circRNA_0046367 administration. These findings indicate a circRNA_0046367/miR-34a/PPARα regulatory system underlying hepatic steatosis. Normalized expression of circRNA_0046367 may ameliorate the lipoxidative stress on the basis of steatosis attenuation. circRNA_0046367, therefore, is suggested to be potential approach to the therapy of lipid peroxidative damage.
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Hicks JA, Porter TE, Liu HC. Identification of microRNAs controlling hepatic mRNA levels for metabolic genes during the metabolic transition from embryonic to posthatch development in the chicken. BMC Genomics 2017; 18:687. [PMID: 28870167 PMCID: PMC5583987 DOI: 10.1186/s12864-017-4096-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 08/29/2017] [Indexed: 12/17/2022] Open
Abstract
Background The transition from embryonic to posthatch development in the chicken represents a massive metabolic switch from primarily lipolytic to primarily lipogenic metabolism. This metabolic switch is essential for the chick to successfully transition from the metabolism of stored egg yolk to the utilization of carbohydrate-based feed. However, regulation of this metabolic switch is not well understood. We hypothesized that microRNAs (miRNAs) play an important role in the metabolic switch that is essential to efficient growth of chickens. We used high-throughput RNA sequencing to characterize expression profiles of mRNA and miRNA in liver during late embryonic and early posthatch development of the chicken. This extensive data set was used to define the contributions of microRNAs to the metabolic switch during development that is critical to growth and nutrient utilization in chickens. Results We found that expression of over 800 mRNAs and 30 miRNAs was altered in the embryonic liver between embryonic day 18 and posthatch day 3, and many of these differentially expressed mRNAs and miRNAs are associated with metabolic processes. We confirmed the regulation of some of these mRNAs by miRNAs expressed in a reciprocal pattern using luciferase reporter assays. Finally, through the use of yeast one-hybrid screens, we identified several proteins that likely regulate expression of one of these important miRNAs. Conclusions Integration of the upstream regulatory mechanisms governing miRNA expression along with monitoring the downstream effects of this expression will ultimately allow for the construction of complete miRNA regulatory networks associated with the hepatic metabolic switch in chickens. Our findings support a key role for miRNAs in controlling the metabolic switch that occurs between embryonic and posthatch development in the chicken. Electronic supplementary material The online version of this article (10.1186/s12864-017-4096-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Julie A Hicks
- Department of Animal Science, North Carolina State University, Polk Hall 232D, Box 7621, Raleigh, NC, 27695, USA
| | - Tom E Porter
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA
| | - Hsiao-Ching Liu
- Department of Animal Science, North Carolina State University, Polk Hall 232D, Box 7621, Raleigh, NC, 27695, USA.
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Dong S, Baranwal S, Garcia A, Serrano-Gomez SJ, Eastlack S, Iwakuma T, Mercante D, Mauvais-Jarvis F, Alahari SK. Nischarin inhibition alters energy metabolism by activating AMP-activated protein kinase. J Biol Chem 2017; 292:16833-16846. [PMID: 28842496 DOI: 10.1074/jbc.m117.784256] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 08/22/2017] [Indexed: 11/06/2022] Open
Abstract
Nischarin (Nisch) is a key protein functioning as a molecular scaffold and thereby hosting interactions with several protein partners. To explore the physiological importance of Nisch, here we generated Nisch loss-of-function mutant mice and analyzed their metabolic phenotype. Nisch-mutant embryos exhibited delayed development, characterized by small size and attenuated weight gain. We uncovered the reason for this phenotype by showing that Nisch binds to and inhibits the activity of AMP-activated protein kinase (AMPK), which regulates energy homeostasis by suppressing anabolic and activating catabolic processes. The Nisch mutations enhanced AMPK activation and inhibited mechanistic target of rapamycin signaling in mouse embryonic fibroblasts as well as in muscle and liver tissues of mutant mice. Nisch-mutant mice also exhibited increased rates of glucose oxidation with increased energy expenditure, despite reduced overall food intake. Moreover, the Nisch-mutant mice had reduced expression of liver markers of gluconeogenesis associated with increased glucose tolerance. As a result, these mice displayed decreased growth and body weight. Taken together, our results indicate that Nisch is an important AMPK inhibitor and a critical regulator of energy homeostasis, including lipid and glucose metabolism.
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Affiliation(s)
- Shengli Dong
- From the Department of Biochemistry and Molecular Biology, School of Medicine, and
| | - Somesh Baranwal
- From the Department of Biochemistry and Molecular Biology, School of Medicine, and.,the Center for Biochemistry and Microbial Sciences, Central University of Punjab, City Campus Mansa Rd., Bathinda-151001, India
| | - Anapatricia Garcia
- the Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia 30322
| | - Silvia J Serrano-Gomez
- From the Department of Biochemistry and Molecular Biology, School of Medicine, and.,the Pontificia Universidad Javeriana, 11001000 Bogotá, Colombia
| | - Steven Eastlack
- From the Department of Biochemistry and Molecular Biology, School of Medicine, and
| | - Tomoo Iwakuma
- the Department of Cancer Biology, Kansas University Medical Center, Kansas City, Kansas 66160, and
| | - Donald Mercante
- Department of Biostatistics, School of Public Health, Louisiana State University Health Science Center, New Orleans, Louisiana 70112
| | - Franck Mauvais-Jarvis
- the Division of Endocrinology, Tulane University School of Medicine, New Orleans, Louisiana 70112
| | - Suresh K Alahari
- From the Department of Biochemistry and Molecular Biology, School of Medicine, and
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35
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Zhang XY, Sun K, Zhu Q, Song T, Liu Y. Ginseng polysaccharide serves as a potential radiosensitizer through inducing apoptosis and autophagy in the treatment of osteosarcoma. Kaohsiung J Med Sci 2017; 33:535-542. [PMID: 29050670 DOI: 10.1016/j.kjms.2017.07.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/20/2017] [Accepted: 06/27/2017] [Indexed: 02/06/2023] Open
Abstract
Recent studies have confirmed that the combined use of anti-cancer drugs with ionizing radiation (IR) could improve the sensitivity of osteosarcoma (OS) cells. Therefore, it is necessary to identify potential effective drugs for the enhancement of IR-radiosensitivity. In the current study, we found that 20, 10, 5, and 1 μM of ginseng polysaccharide (GPS) significantly suppressed MG-63 cell viability with or without γ-ray radiation in a dose- and time-dependent manner. Strikingly, 20 μM of GPS combined with 5 Gy treatment suppressed colony formation capacity by nearly 13.75∼fold compared with IR treatment alone. Our results showed that GPS could markedly induce early apoptosis and autophagy in MG-63 cells. A higher drug concentration and a greater exposure dose were directly associated with more apoptosis and autophagy in cells. Western blot analysis showed that GPS decreased the phosphorylation of p38 and AKT as well as the protein expression of Bax and cleaved-caspase3. In summary, GPS inhibited proliferation and increased apoptosis and autophagic death in OS cells, indicating that GPS may be a potential effective auxiliary drug for improving the IR sensitivity of OS patients.
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Affiliation(s)
- Xiao-Yu Zhang
- Department of Orthopedics, Ningxia People's Hospital, Ningxia Province, China
| | - Ke Sun
- Department of Orthopedics, Shangluo Central Hospital, Shangluo City, Shaanxi Province, China
| | - Qi Zhu
- Department of Hand surgery, Ruian Municipal People's Hospital, Ruian City, Zhejiang Province, China
| | - Tao Song
- Department of Orthopedic Surgery, Hong Hui Hospital Xi'an Jiaotong University, Xi'an City, Shaanxi Province, China
| | - Yang Liu
- Department of Orthopedic Surgery, Hong Hui Hospital Xi'an Jiaotong University, Xi'an City, Shaanxi Province, China.
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Guo J, Dou L, Meng X, Chen Z, Yang W, Fang W, Yang C, Huang X, Tang W, Yang J, Li J. Hepatic MiR-291b-3p Mediated Glucose Metabolism by Directly Targeting p65 to Upregulate PTEN Expression. Sci Rep 2017; 7:39899. [PMID: 28054586 PMCID: PMC5214750 DOI: 10.1038/srep39899] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 11/29/2016] [Indexed: 12/14/2022] Open
Abstract
Several studies have suggested an important role of miR-291b-3p in the development of embryonic stem cells. In previous study, we found that the expression of miR-291b-3p was significantly upregulated in the liver of db/db mice. However, the role of miR-291b-3p in glucose metabolism and its underlying mechanisms remain unknown. In the present study, we demonstrated that miR-291b-3p was abundantly expressed in the liver. Of note, hepatic miR-291b-3p expression was upregulated in HFD-fed mice and induced by fasting in C57BL/6 J normal mice. Importantly, hepatic inhibition miR-291b-3p expression ameliorated hyperglycemia and insulin resistance in HFD-fed mice, whereas hepatic overexpression of miR-291b-3p led to hyperglycemia and insulin resistance in C57BL/6 J normal mice. Further study revealed that miR-291b-3p suppressed insulin-stimulated AKT/GSK signaling and increased the expression of gluconeogenic genes in hepatocytes. Moreover, we identified that p65, a subunit of nuclear factor-κB (NF-κB), is a target of miR-291b-3p by bioinformatics analysis and luciferase reporter assay. Silencing of p65 significantly augmented the expression of PTEN and impaired AKT activation. In conclusion, we found novel evidence suggesting that hepatic miR-291b-3p mediated glycogen synthesis and gluconeogenesis through targeting p65 to regulate PTEN expression. Our findings indicate the therapeutic potential of miR-291b-3p inhibitor in hyperglycemia and insulin resistance.
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Affiliation(s)
- Jun Guo
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, 100730, P. R. China
| | - Lin Dou
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, 100730, P. R. China
| | - Xiangyu Meng
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, 100730, P. R. China
| | - Zhenzhen Chen
- Department of physiology and pathophysiology, key laboratory of molecular cardiovascular science of the ministry of education, Peking University Health Science Center, Beijing 100191, China
| | - Weili Yang
- Department of physiology and pathophysiology, key laboratory of molecular cardiovascular science of the ministry of education, Peking University Health Science Center, Beijing 100191, China
| | - Weiwei Fang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, 100730, P. R. China
| | - Chunxiao Yang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, 100730, P. R. China
| | - Xiuqing Huang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, 100730, P. R. China
| | - Weiqing Tang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, 100730, P. R. China
| | - Jichun Yang
- Department of physiology and pathophysiology, key laboratory of molecular cardiovascular science of the ministry of education, Peking University Health Science Center, Beijing 100191, China
| | - Jian Li
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, 100730, P. R. China
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Pang D, You L, Zhou L, Li T, Zheng B, Liu RH. Averrhoa carambolafree phenolic extract ameliorates nonalcoholic hepatic steatosis by modulating mircoRNA-34a, mircoRNA-33 and AMPK pathways in leptin receptor-deficient db/db mice. Food Funct 2017; 8:4496-4507. [DOI: 10.1039/c7fo00833c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Averrhoa carambolafree phenolic extract ameliorates hepatic steatosis by modulating mircoRNA-34a, mircoRNA-33 and AMPK signaling.
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Affiliation(s)
- Daorui Pang
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou
- People's Republic of China
| | - Lijun You
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou
- People's Republic of China
| | - Lin Zhou
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou
- People's Republic of China
- Guangdong Province Key Laboratory for Biotechnology Drug Candidates
| | - Tong Li
- Department of Food Science
- Cornell University
- Ithaca
- USA
| | - Bisheng Zheng
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou
- People's Republic of China
| | - Rui Hai Liu
- Department of Food Science
- Cornell University
- Ithaca
- USA
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38
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Liu XL, Cao HX, Fan JG. MicroRNAs as biomarkers and regulators of nonalcoholic fatty liver disease. J Dig Dis 2016; 17:708-715. [PMID: 27628945 DOI: 10.1111/1751-2980.12408] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 08/29/2016] [Accepted: 09/11/2016] [Indexed: 12/11/2022]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a complicated disease affected by the interaction of environmental and genetic factors; however, the precise pathogenesis of the disease has not been fully determined. There is a need to better understand the pathogenesis of NAFLD and to identify non-invasive diagnostic modalities. Recent advances in systematic biology and epigenetics have improved our understanding of the genotype-phenotype relationships in NAFLD. MicroRNAs (miRNAs) are important regulators of a wide range of biological processes. MiRNAs are extremely stable and protect from RNAase-mediated degradation in body fluids, making them attractive candidate biomarkers for the early detection of the disease and the monitoring of disease progression. In this review, we summarized the current knowledge on miRNAs as potential biomarkers of NAFLD at different stages and for the prognosis of advanced diseases. Furthermore, we discussed the implications of miRNAs that functioning in lipid metabolism and hepatic steatosis as well as in hepatic inflammation and fibrosis with regard to the pathogenesis of NAFLD.
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Affiliation(s)
- Xiao Lin Liu
- Department of Gastroenterology and Center for Fatty Liver, XinHua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Hai Xia Cao
- Department of Gastroenterology and Center for Fatty Liver, XinHua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jian Gao Fan
- Department of Gastroenterology and Center for Fatty Liver, XinHua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
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