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Chen J, Wang R, Xiong F, Sun H, Kemper B, Li W, Kemper J. Hammerhead-type FXR agonists induce an enhancer RNA Fincor that ameliorates nonalcoholic steatohepatitis in mice. eLife 2024; 13:RP91438. [PMID: 38619504 PMCID: PMC11018349 DOI: 10.7554/elife.91438] [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] [Indexed: 04/16/2024] Open
Abstract
The nuclear receptor, farnesoid X receptor (FXR/NR1H4), is increasingly recognized as a promising drug target for metabolic diseases, including nonalcoholic steatohepatitis (NASH). Protein-coding genes regulated by FXR are well known, but whether FXR also acts through regulation of long non-coding RNAs (lncRNAs), which vastly outnumber protein-coding genes, remains unknown. Utilizing RNA-seq and global run-on sequencing (GRO-seq) analyses in mouse liver, we found that FXR activation affects the expression of many RNA transcripts from chromatin regions bearing enhancer features. Among these we discovered a previously unannotated liver-enriched enhancer-derived lncRNA (eRNA), termed FXR-induced non-coding RNA (Fincor). We show that Fincor is specifically induced by the hammerhead-type FXR agonists, including GW4064 and tropifexor. CRISPR/Cas9-mediated liver-specific knockdown of Fincor in dietary NASH mice reduced the beneficial effects of tropifexor, an FXR agonist currently in clinical trials for NASH and primary biliary cholangitis (PBC), indicating that amelioration of liver fibrosis and inflammation in NASH treatment by tropifexor is mediated in part by Fincor. Overall, our findings highlight that pharmacological activation of FXR by hammerhead-type agonists induces a novel eRNA, Fincor, contributing to the amelioration of NASH in mice. Fincor may represent a new drug target for addressing metabolic disorders, including NASH.
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Affiliation(s)
- Jinjing Chen
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-ChampaignUrbanaUnited States
| | - Ruoyu Wang
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science CenterHoustonUnited States
| | - Feng Xiong
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science CenterHoustonUnited States
| | - Hao Sun
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-ChampaignUrbanaUnited States
| | - Byron Kemper
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-ChampaignUrbanaUnited States
| | - Wenbo Li
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science CenterHoustonUnited States
| | - Jongsook Kemper
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-ChampaignUrbanaUnited States
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2
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Mohammadpour-Asl S, Roshan-Milani B, Roshan-Milani S, Saboory E, Ghobadian B, Chodari L. Endoplasmic reticulum stress PERK-ATF4-CHOP pathway is involved in non-alcoholic fatty liver disease in type 1 diabetic rats: The rescue effect of treatment exercise and insulin-like growth factor I. Heliyon 2024; 10:e27225. [PMID: 38468961 PMCID: PMC10926145 DOI: 10.1016/j.heliyon.2024.e27225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 03/13/2024] Open
Abstract
Endoplasmic Reticulum Stress (ERS) is a key factor in the development of Non-Alcoholic Fatty Liver Disease (NAFLD) in diabetes. The current study aimed to examine the effects of exercise and IGF-I on ERS markers in liver tissue. Rats were divided into five groups (n = 8 per group), including control (CON), diabetes (DIA), diabetes + exercise (DIA + EX), diabetes + IGF-I (DIA + IGF-I), and diabetes + exercise + IGF-I (DIA + EX + IGF-I). Type 1 diabetes was induced by an I.P. injection of streptozotocin (60 mg/kg). After 30 days of treatment with exercise or IGF-I alone or in combination, liver tissue was assessed for caspase 12, 8, and CHOP protein levels, and expression of ERS markers (ATF-6, PERK, IRE-1A) and lipid metabolism-involved genes (FAS, FXR, SREBP-1c) by western immunoblotting. In addition, for the evaluation of histopathological changes in the liver, Hematoxylin - Eosin and Masson's Trichrome staining were done. Compared to the control group, diabetes significantly caused liver fibrosis, induced ERS, increased caspase 12 and 8 levels in the liver, and changed expression levels of genes associated with lipid metabolism, including FAS, FXR, and SREBP-1c. Treatment with either exercise or IGF-I reduced fibrosis levels suppressed ER stress markers and apoptosis, and improved expression of genes associated with lipid metabolism. In addition, simultaneous treatment with exercise and IGF-I showed a synergistic effect compared to DIA + E and DIA + IGF-I. The results suggest that IGF-1 and exercise reduced liver fibrosis possibly by reducing ERS, creating adaptive ER stress status, and improving protein folding.
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Affiliation(s)
- Shadi Mohammadpour-Asl
- Student Research Committee, Urmia University of Medical Sciences, Urmia, Iran
- Department of Physiology, School of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | | | - Shiva Roshan-Milani
- Department of Physiology, School of Medicine, Urmia University of Medical Sciences, Urmia, Iran
- Neurophysiology Research Center, Cellular and Molecular Medicine Research Institute, Urmia University of Medical Sciences, Urmia, Iran
| | - Ehsan Saboory
- Department of Addiction Studies, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Bijan Ghobadian
- Zanjan Metabolic Diseases Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Leila Chodari
- Department of Physiology, School of Medicine, Urmia University of Medical Sciences, Urmia, Iran
- Neurophysiology Research Center, Cellular and Molecular Medicine Research Institute, Urmia University of Medical Sciences, Urmia, Iran
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Chen J, Wang R, Xiong F, Sun H, Kemper B, Li W, Kemper JK. Hammerhead-type FXR agonists induce an eRNA FincoR that ameliorates nonalcoholic steatohepatitis in mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.11.20.567833. [PMID: 38045226 PMCID: PMC10690184 DOI: 10.1101/2023.11.20.567833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
The nuclear receptor, Farnesoid X Receptor (FXR/NR1H4), is increasingly recognized as a promising drug target for metabolic diseases, including nonalcoholic steatohepatitis (NASH). Protein coding genes regulated by FXR are well known, but whether FXR also acts through regulation of long non-coding RNAs (lncRNAs), which vastly outnumber protein-coding genes, remains unknown. Utilizing RNA-seq and GRO-seq analyses in mouse liver, we found that FXR activation affects the expression of many RNA transcripts from chromatin regions bearing enhancer features. Among these we discovered a previously unannotated liver-enriched enhancer-derived lncRNA (eRNA), termed FincoR. We show that FincoR is specifically induced by the hammerhead-type FXR agonists, including GW4064 and tropifexor. CRISPR/Cas9-mediated liver-specific knockdown of FincoR in dietary NASH mice reduced the beneficial effects of tropifexor, an FXR agonist currently in clinical trials for NASH and primary biliary cholangitis (PBC), indicating that that amelioration of liver fibrosis and inflammation in NASH treatment by tropifexor is mediated in part by FincoR. Overall, our findings highlight that pharmacological activation of FXR by hammerhead-type agonists induces a novel eRNA, FincoR, contributing to the amelioration of NASH in mice. FincoR may represent a new drug target for addressing metabolic disorders, including NASH.
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Affiliation(s)
- Jinjing Chen
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Ruoyu Wang
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Feng Xiong
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Hao Sun
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Byron Kemper
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Wenbo Li
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Jongsook Kim Kemper
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
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Run L, Tian Z, Xu L, Du J, Li N, Wang Q, Sun H. Knockdown of IL4I1 Improved High Glucose-evoked Insulin Resistance in HepG2 Cells by Alleviating Inflammation and Lipotoxicity Through AHR Activation. Appl Biochem Biotechnol 2023; 195:6694-6707. [PMID: 36913096 DOI: 10.1007/s12010-023-04399-9] [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] [Accepted: 02/17/2023] [Indexed: 03/14/2023]
Abstract
Insulin resistance (IR) is one of the leading causes of Type 2 diabetes mellitus (T2DM). Inflammation, as a result of the disordered immune response, plays important roles in IR and T2DM. Interleukin-4-induced gene 1 (IL4I1) has been shown to regulate immune response and be involved in inflammation progress. However, there was little known about its roles in T2DM. Here, high glucose (HG)-treated HepG2 cells were used for T2DM investigation in vitro. Our results indicated that the expression of IL4I1 was up-regulated in peripheral blood samples of T2DM-patients and HG-induced HepG2 cells. The silencing of IL4I1 alleviated the HG-evoked IR through elevating the expressions of p-IRS1, p-AKT and GLUT4, and enhancing glucose consumption. Furthermore, IL4I1 knockdown inhibited inflammatory response by reducing the levels of inflammatory mediators, and suppressed the accumulation of lipid metabolites triglyceride (TG) and palmitate (PA) in HG-induced cells. Notably, IL4I1 expression was positively correlated with aryl hydrocarbon receptor (AHR) in peripheral blood samples of T2DM-patients. The silencing of IL4I1 inhibited the AHR signaling by reducing the HG-induced expressions of AHR and CYP1A1. Subsequent experiments confirmed that 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD), an agonist of AHR, reversed the suppressive effects of IL4I1 knockdown on HG-caused inflammation, lipid metabolism and IR in cells. In conclusion, we found that the silencing of IL4I1 attenuated inflammation, lipid metabolism and IR in HG-induced cells via inhibiting AHR signaling, suggesting that IL4I1 might be a potential therapy target for T2DM.
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Affiliation(s)
- Lin Run
- Department of Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 710061, Xi'an, Shaanxi, China, NO. 76, Yanta West Road, Yanta District
- Department of Endocrinology, Xi'an Central Hospital Affiliated to Medical College of Xi'an Jiaotong University, 710003, Xi'an, Shaanxi, China
| | - Zhufang Tian
- Department of Endocrinology, Xi'an Central Hospital Affiliated to Medical College of Xi'an Jiaotong University, 710003, Xi'an, Shaanxi, China
| | - Lin Xu
- Department of Endocrinology, The Affiliated Guangren Hospital, Xi'an Jiaotong University College of Medicine, 710004, Xi'an, Shaanxi, China
| | - Junhui Du
- Department of Medicine Interdisciplinary Research, Xi'an Ninth Hospital Affiliated to Medical College of Xi'an Jiaotong University, 710054, Xi'an, Shaanxi, China
| | - Nan Li
- Clinical Laboratory, Xi'an Central Hospital Affiliated to Medical College of Xi'an Jiaotong University, 710003, Xi'an, Shaanxi, China
| | - Qi Wang
- Department of Nuclear Medicine, Xi'an Central Hospital Affiliated to Medical College of Xi'an Jiaotong University, 710003, Xi'an, Shaanxi, China
| | - Hongzhi Sun
- Department of Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 710061, Xi'an, Shaanxi, China, NO. 76, Yanta West Road, Yanta District.
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5
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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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Cai Y, Liu P, Xu Y, Xia Y, Peng X, Zhao H, Chen Q. Biomarkers of obesity-mediated insulin resistance: focus on microRNAs. Diabetol Metab Syndr 2023; 15:167. [PMID: 37537674 PMCID: PMC10401761 DOI: 10.1186/s13098-023-01137-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 07/09/2023] [Indexed: 08/05/2023] Open
Abstract
Obesity and metabolic syndromes are becoming increasingly prevalent worldwide. Insulin resistance (IR) is a common complication of obesity. However, IR occurrence varies across individuals with obesity and may involve epigenetic factors. To rationalize the allocation of healthcare resources, biomarkers for the early risk stratification of individuals with obesity should be identified. MicroRNAs (miRNAs) are closely associated with metabolic diseases and involved in epigenetic regulation. In this review, we have summarized the changes in miRNA expression in the peripheral circulation and tissues of patients and animals with obesity-associated IR over the last 5 years and identified several candidate biomarkers that predict obesity-related IR. There are areas for improvement in existing studies. First, more than the predictive validity of a single biomarker is required, and a biomarker panel needs to be formed. Second, miRNAs are often studied in isolation and do not form a network of signaling pathways. We believe that early biomarkers can help clinicians accurately predict individuals prone to obesity-related IR at an early stage. Epigenetic regulation may be one of the underlying causes of different clinical outcomes in individuals with obesity. Future studies should focus on objectively reflecting the differences in miRNA profile expression in individuals with obesity-related IR, which may help identify more reliable biomarkers. Understanding the metabolic pathways of these miRNAs can help design new metabolic risk prevention and management strategies, and support the development of drugs to treat obesity and metabolic disorders.
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Affiliation(s)
- Yichen Cai
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan, China
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Pan Liu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan, China
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yumei Xu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan, China
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yuguo Xia
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan, China
| | - Xiaowan Peng
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan, China
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Haiyan Zhao
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan, China
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Qiu Chen
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan, China.
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Zhu Y, Zhou X, Ling N, Yu Q, Wang H, Du Q. The Effect of Guisangyou Tea on Abnormal Lipid Metabolism in Mice Induced by High-Fat Diet. Foods 2023; 12:foods12112171. [PMID: 37297416 DOI: 10.3390/foods12112171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/16/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023] Open
Abstract
This study was aimed to investigate the effect of Guisangyou tea (GSY tea) in improving abnormal lipid metabolism in mice with obesity induced by a high-fat diet (HFD). The results showed that intervention of the water extract of GSY tea (WE) decreased serum levels of lipids, and positively regulated the related antioxidant enzyme activities and the inflammatory factors in the serum and liver. In the liver, the mRNA and protein expression levels of sterol regulatory element-binding proteins-1 (SREBP-1), stearoyl-CoA desaturase-1 (SCD-1), fatty acid synthase (FASN), and acetyl CoA carboxylase (ACC) related to lipid synthesis were downregulated, and the mRNA and protein expression levels of the farnesoid X receptor (FXR) and small heterodimer partner (SHP) related to bile acid production were upregulated. The results demonstrate that GSY tea can improve abnormal lipid metabolism in obese mice by improving the body's antioxidant capacity, regulating the inflammatory state, and reducing the synthesis of lipids and increasing the production of bile acids. GSY tea can be processed and utilized as a safe and effective resource for improving abnormal lipid metabolism.
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Affiliation(s)
- Yan Zhu
- College of Food and Health Sciences, Zhejiang A & F University, Hangzhou 311300, China
| | - Xianghui Zhou
- College of Public Health, Guilin Medical University, Guilin 541100, China
| | - Nan Ling
- College of Public Health, Guilin Medical University, Guilin 541100, China
| | - Qiming Yu
- College of Public Health, Guilin Medical University, Guilin 541100, China
| | - Huijuan Wang
- College of Food and Health Sciences, Zhejiang A & F University, Hangzhou 311300, China
| | - Qizhen Du
- College of Food and Health Sciences, Zhejiang A & F University, Hangzhou 311300, China
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Lv WJ, Huang JY, Lin J, Ma YM, He SQ, Zhang YW, Wang TZ, Cheng K, Xiong Y, Sun FG, Pan ZC, Sun JB, Mao W, Guo SN. Phytosterols Alleviate Hyperlipidemia by Regulating Gut Microbiota and Cholesterol Metabolism in Mice. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2023; 2023:6409385. [PMID: 37151603 PMCID: PMC10156461 DOI: 10.1155/2023/6409385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/29/2022] [Accepted: 02/17/2023] [Indexed: 05/09/2023]
Abstract
Phytosterols (PS) have been shown to regulate cholesterol metabolism and alleviate hyperlipidemia (HLP), but the mechanism is still unclear. In this study, we investigated the mechanism by which PS regulates cholesterol metabolism in high-fat diet (HFD) mice. The results showed that PS treatment reduced the accumulation of total cholesterol (TC), triglycerides (TG), and low-density lipoprotein cholesterol (LDL-C) in the serum of HFD mice, while increasing the serum levels of high-density lipoprotein cholesterol (HDL-C). Compared with HFD mice, PS not only increased the antioxidant activity of the liver but also regulated the mRNA expression levels of enzymes and receptors related to cholesterol metabolism. The hypolipidemic effect of PS was abolished by antibiotic (Abx) intervention and reproduced by fecal transplantation (FMT) intervention. The results of 16S rRNA sequencing analysis showed that PS modulated the gut microbiota of mice. PS reduced the relative abundance of Lactobacillus and other bile salt hydrolase- (BSH-) producing gut microbiota in HFD mice, which are potentially related to cholesterol metabolism. These findings partially explain the mechanisms by which PS regulates cholesterol metabolism. This implies that regulation of the gut microbiota would be a potential target for the treatment of HLP.
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Affiliation(s)
- Wei-Jie Lv
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Jie-Yi Huang
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Jin Lin
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Yi-Mu Ma
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Shi-Qi He
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Ying-Wen Zhang
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Tian-Ze Wang
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Ke Cheng
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Ying Xiong
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Feng-Gang Sun
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Zhong-Chao Pan
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Jing-Bo Sun
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Wei Mao
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
| | - Shi-Ning Guo
- College of Veterinary Medicine, South China Agricultural University, State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
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Zhao Y, Yu Y, Ommati MM, Xu J, Wang J, Zhang J, Sun Z, Niu R, Wang J. Multiomics Analysis Revealed the Molecular Mechanism of miRNAs in Fluoride-Induced Hepatic Glucose and Lipid Metabolism Disorders. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:14284-14295. [PMID: 36222057 DOI: 10.1021/acs.jafc.2c03049] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Fluoride-induced liver injury seriously endangers human and animal health and animal food safety, but the underlying mechanism remains unclear. This study aims to explore the mechanism of miRNAs in fluoride-induced hepatic glycolipid metabolism disorders. C57 male mice were used to establish the fluorosis model (22.62 mg/L F-, 12 weeks). The results indicated that fluoride increased fluoride levels, impaired the structure and function, and disrupted the glycolipid metabolism in the liver. Furthermore, the sequencing results showed that fluoride exposure resulted in the differential expression of 35 miRNAs and 480 mRNAs, of which 23 miRNAs were related to glycolipid metabolism. miRNA-mRNA network analyses and RT-PCR revealed that miRNAs mediated fluoride-induced disturbances in the hepatic glycolipid metabolism. Its possible mechanism was to regulate the insulin pathway, PPAR pathway, and FOXO pathway, which in turn affected the bile secretion, the metabolic processes of glucose, the decomposition of lipids, and the synthesis of unsaturated fatty acids in the liver. This study provides a theoretical basis for miRNAs as diagnostic indicators and target drugs for the treatment of fluoride-induced liver injury.
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Affiliation(s)
- Yangfei Zhao
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Yanghuan Yu
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Mohammad Mehdi Ommati
- College of Life Sciences, Shanxi Agricultural University, Taigu, Shanxi 030801, China
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz 71348-14336, Iran
| | - Jipeng Xu
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Jinming Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Jianhai Zhang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Zilong Sun
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Ruiyan Niu
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Jundong Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
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10
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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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11
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Role of Bile Acids and Nuclear Receptors in Acupuncture in Improving Crohn's Disease. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:5814048. [PMID: 35600949 PMCID: PMC9122672 DOI: 10.1155/2022/5814048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/13/2021] [Accepted: 04/15/2022] [Indexed: 11/30/2022]
Abstract
Nuclear receptors (NRs) are ligand-dependent transcription factors that regulate the transcription of target genes. Bile acids (BAs) can be used as effector molecules to regulate physiological processes in the gut, and NRs are important receptors for bile acid signaling. Relevant studies have shown that NRs are closely related to the occurrence of Crohn's disease (CD). Although the mechanism of NRs in CD has not been clarified completely, growing evidence shows that NRs play an important role in regulating intestinal immunity, mucosal barrier, and intestinal flora. NRs can participate in the progress of CD by mediating inflammation, immunity, and autophagy. As the important parts of traditional Chinese medicine (TCM) therapy, acupuncture and moxibustion in the treatment of CD curative mechanism can get a lot of research support. At the same time, acupuncture and moxibustion can regulate the changes of related NRs. Therefore, to explore whether acupuncture can regulate BA circulation and NRs expression and then participate in the disease progression of CD, a new theoretical basis for acupuncture treatment of CD is provided.
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Guan B, Tong J, Hao H, Yang Z, Chen K, Xu H, Wang A. Bile acid coordinates microbiota homeostasis and systemic immunometabolism in cardiometabolic diseases. Acta Pharm Sin B 2022; 12:2129-2149. [PMID: 35646540 PMCID: PMC9136572 DOI: 10.1016/j.apsb.2021.12.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 11/25/2021] [Accepted: 11/29/2021] [Indexed: 02/08/2023] Open
Abstract
Cardiometabolic disease (CMD), characterized with metabolic disorder triggered cardiovascular events, is a leading cause of death and disability. Metabolic disorders trigger chronic low-grade inflammation, and actually, a new concept of metaflammation has been proposed to define the state of metabolism connected with immunological adaptations. Amongst the continuously increased list of systemic metabolites in regulation of immune system, bile acids (BAs) represent a distinct class of metabolites implicated in the whole process of CMD development because of its multifaceted roles in shaping systemic immunometabolism. BAs can directly modulate the immune system by either boosting or inhibiting inflammatory responses via diverse mechanisms. Moreover, BAs are key determinants in maintaining the dynamic communication between the host and microbiota. Importantly, BAs via targeting Farnesoid X receptor (FXR) and diverse other nuclear receptors play key roles in regulating metabolic homeostasis of lipids, glucose, and amino acids. Moreover, BAs axis per se is susceptible to inflammatory and metabolic intervention, and thereby BAs axis may constitute a reciprocal regulatory loop in metaflammation. We thus propose that BAs axis represents a core coordinator in integrating systemic immunometabolism implicated in the process of CMD. We provide an updated summary and an intensive discussion about how BAs shape both the innate and adaptive immune system, and how BAs axis function as a core coordinator in integrating metabolic disorder to chronic inflammation in conditions of CMD.
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Key Words
- AS, atherosclerosis
- ASBT, apical sodium-dependent bile salt transporter
- BAs, bile acids
- BSEP, bile salt export pump
- BSH, bile salt hydrolases
- Bile acid
- CA, cholic acid
- CAR, constitutive androstane receptor
- CCs, cholesterol crystals
- CDCA, chenodeoxycholic acid
- CMD, cardiometabolic disease
- CVDs, cardiovascular diseases
- CYP7A1, cholesterol 7 alpha-hydroxylase
- CYP8B1, sterol 12α-hydroxylase
- Cardiometabolic diseases
- DAMPs, danger-associated molecular patterns
- DCA, deoxycholic acid
- DCs, dendritic cells
- ERK, extracellular signal-regulated kinase
- FA, fatty acids
- FFAs, free fatty acids
- FGF, fibroblast growth factor
- FMO3, flavin-containing monooxygenase 3
- FXR, farnesoid X receptor
- GLP-1, glucagon-like peptide 1
- HCA, hyocholic acid
- HDL, high-density lipoprotein
- HFD, high fat diet
- HNF, hepatocyte nuclear receptor
- IL, interleukin
- IR, insulin resistance
- JNK, c-Jun N-terminal protein kinase
- LCA, lithocholic acid
- LDL, low-density lipoprotein
- LDLR, low-density lipoprotein receptor
- LPS, lipopolysaccharide
- NAFLD, non-alcoholic fatty liver disease
- NASH, nonalcoholic steatohepatitis
- NF-κB, nuclear factor-κB
- NLRP3, NLR family pyrin domain containing 3
- Nuclear receptors
- OCA, obeticholic acid
- PKA, protein kinase A
- PPARα, peroxisome proliferator-activated receptor alpha
- PXR, pregnane X receptor
- RCT, reverses cholesterol transportation
- ROR, retinoid-related orphan receptor
- S1PR2, sphingosine-1-phosphate receptor 2
- SCFAs, short-chain fatty acids
- SHP, small heterodimer partner
- Systemic immunometabolism
- TG, triglyceride
- TGR5, takeda G-protein receptor 5
- TLR, toll-like receptor
- TMAO, trimethylamine N-oxide
- Therapeutic opportunities
- UDCA, ursodeoxycholic acid
- VDR, vitamin D receptor
- cAMP, cyclic adenosine monophosphate
- mTOR, mammalian target of rapamycin
- ox-LDL, oxidated low-density lipoprotein
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Affiliation(s)
- Baoyi Guan
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China
- National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
| | - Jinlin Tong
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China
| | - Haiping Hao
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Zhixu Yang
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China
| | - Keji Chen
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China
- National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
| | - Hao Xu
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China
- National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
| | - Anlu Wang
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China
- National Clinical Research Center for Chinese Medicine Cardiology, Beijing 100091, China
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Abstract
An extensive literature base combined with advances in sequencing technologies demonstrate microRNA levels correlate with various metabolic diseases. Mechanistic studies also establish microRNAs regulate central metabolic pathways and thus play vital roles in maintaining organismal energy balance and metabolic homeostasis. This review highlights research progress on the roles and regulation of microRNAs in the peripheral tissues that confer insulin sensitivity. We discuss sequencing technologies used to comprehensively define the target spectrum of microRNAs in metabolic disease that complement studies reporting physiologic roles for microRNAs in the regulation of glucose and lipid metabolism in animal models. We also discuss the emerging roles of exosomal microRNAs as endocrine signals to regulate lipid and carbohydrate metabolism.
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Affiliation(s)
- Kang Ho Kim
- Department of Anesthesiology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Sean M Hartig
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
- Correspondence: Sean M. Hartig, PhD, Baylor College of Medicine, One Baylor Plaza, BCM185, Houston, TX 77030, USA.
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The Role and Mechanism of Oxidative Stress and Nuclear Receptors in the Development of NAFLD. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:6889533. [PMID: 34745420 PMCID: PMC8566046 DOI: 10.1155/2021/6889533] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 10/11/2021] [Indexed: 12/12/2022]
Abstract
The overproduction of reactive oxygen species (ROS) and consequent oxidative stress contribute to the pathogenesis of acute and chronic liver diseases. It is now acknowledged that nonalcoholic fatty liver disease (NAFLD) is characterized as a redox-centered disease due to the role of ROS in hepatic metabolism. However, the underlying mechanisms accounting for these alternations are not completely understood. Several nuclear receptors (NRs) are dysregulated in NAFLD, and have a direct influence on the expression of a set of genes relating to the progress of hepatic lipid homeostasis and ROS generation. Meanwhile, the NRs act as redox sensors in response to metabolic stress. Therefore, targeting NRs may represent a promising strategy for improving oxidation damage and treating NAFLD. This review summarizes the link between impaired lipid metabolism and oxidative stress and highlights some NRs involved in regulating oxidant/antioxidant turnover in the context of NAFLD, shedding light on potential therapies based on NR-mediated modulation of ROS generation and lipid accumulation.
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Wu J, Nagy LE, Wang L. The long and the small collide: LncRNAs and small heterodimer partner (SHP) in liver disease. Mol Cell Endocrinol 2021; 528:111262. [PMID: 33781837 PMCID: PMC8087644 DOI: 10.1016/j.mce.2021.111262] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 03/20/2021] [Accepted: 03/22/2021] [Indexed: 02/08/2023]
Abstract
Long non-coding RNAs (lncRNAs) are a large and diverse class of RNA molecules that are transcribed but not translated into proteins, with a length of more than 200 nucleotides. LncRNAs are involved in gene expression and regulation. The abnormal expression of lncRNAs is associated with disease pathogenesis. Small heterodimer partner (SHP, NR0B2) is a unique orphan nuclear receptor that plays a pivotal role in many biological processes by acting as a transcriptional repressor. In this review, we present the critical roles of SHP and summarize recent findings demonstrating the regulation between lncRNAs and SHP in liver disease.
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Affiliation(s)
- Jianguo Wu
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH, USA.
| | - Laura E Nagy
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Department of Gastroenterology and Hepatology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH, USA
| | - Li Wang
- Independent Researcher, Tucson, AZ, USA
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