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Filip R, Bélanger É, Chen X, Lefebvre D, Uguccioni SM, Pezacki JP. LYPLAL1 enzyme activity is linked to hepatic glucose metabolism. Biochem Biophys Res Commun 2025; 759:151656. [PMID: 40147354 DOI: 10.1016/j.bbrc.2025.151656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2024] [Revised: 03/14/2025] [Accepted: 03/17/2025] [Indexed: 03/29/2025]
Abstract
The serine hydrolase LYPLAL1 is a poorly characterised enzyme with emerging roles in hepatic metabolism. A multitude of association studies have shown links between variants of this gene locus and metabolic conditions such as obesity and insulin resistance. However, the enzyme's function is still largely unknown. Recent biochemical studies have revealed that it may play a role in hepatic glucose metabolism and that its activity is allosterically regulated. Herein, we use a selective activity-based probe to delineate LYPLAL1's involvement in hepatic metabolism. We show that the enzyme's activity is modulated during metabolic stress, specifically pointing to a putative role in negatively regulating gluconeogenesis and upregulating glycolysis. We also determine that knock-out of the enzyme does not affect liver lipid profiles and bring forth evidence for insulin-mediated control of LYPLAL1 in HepG2 cells. Furthermore, LYPLAL1 activity appears to be largely post-translationally regulated as gene expression levels remain largely constant under insulin and glucagon treatments. Taken together these data point to an enzymatic role in regulating glucose metabolism that may be part of a feedback mechanism of signal transduction.
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Affiliation(s)
- Roxana Filip
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, K1N 6N5, Canada
| | - Étienne Bélanger
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, K1N 6N5, Canada
| | - Xinhzu Chen
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, K1N 6N5, Canada
| | - David Lefebvre
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, K1N 6N5, Canada
| | - Spencer M Uguccioni
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, K1N 6N5, Canada
| | - John Paul Pezacki
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, K1N 6N5, Canada.
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2
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Jo D, Arjunan A, Choi S, Jung YS, Park J, Jo J, Kim OY, Song J. Oligonol ameliorates liver function and brain function in the 5 × FAD mouse model: transcriptional and cellular analysis. Food Funct 2023; 14:9650-9670. [PMID: 37843873 DOI: 10.1039/d3fo03451h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
Alzheimer's disease (AD) is a common neurodegenerative disease worldwide and is accompanied by memory deficits, personality changes, anxiety, depression, and social difficulties. For treatment of AD, many researchers have attempted to find medicinal resources with high effectiveness and without side effects. Oligonol is a low molecular weight polypeptide derived from lychee fruit extract. We investigated the effects of oligonol in 5 × FAD transgenic AD mice, which developed severe amyloid pathology, through behavioral tests (Barnes maze, marble burying, and nestle shredding) and molecular experiments. Oligonol treatment attenuated blood glucose levels and increased the antioxidant response in the livers of 5 × FAD mice. Moreover, the behavioral score data showed improvements in anxiety, depressive behavior, and cognitive impairment following a 2-month course of orally administered oligonol. Oligonol treatment not only altered the circulating levels of cytokines and adipokines in 5 × FAD mice, but also significantly enhanced the mRNA and protein levels of antioxidant enzymes and synaptic plasticity in the brain cortex and hippocampus. Therefore, we highlight the therapeutic potential of oligonol to attenuate neuropsychiatric problems and improve memory deficits in the early stage of AD.
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Affiliation(s)
- Danbi Jo
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Seoyangro 264, Hwasun 58128, Republic of Korea
| | - Archana Arjunan
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
| | - Seoyoon Choi
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Seoyangro 264, Hwasun 58128, Republic of Korea
| | - Yoon Seok Jung
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
| | - Jihyun Park
- Department of Food Science and Nutrition, Dong-A University, Nakdong-daero 550 beon-gil, Saha-gu, Busan, 49315, Republic of Korea.
- Department of Health Sciences, Graduate School of Dong-A University, Nakdong-daero 550 beon-gil, Saha-gu, Busan, 49315, Republic of Korea
| | - Jihoon Jo
- Department of Biomedical Science, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
| | - Oh Yoen Kim
- Department of Food Science and Nutrition, Dong-A University, Nakdong-daero 550 beon-gil, Saha-gu, Busan, 49315, Republic of Korea.
- Department of Health Sciences, Graduate School of Dong-A University, Nakdong-daero 550 beon-gil, Saha-gu, Busan, 49315, Republic of Korea
| | - Juhyun Song
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Seoyangro 264, Hwasun 58128, Republic of Korea
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3
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Jiang Y, Zhou L. Association between chronic hepatitis C infection and metabolic syndrome: A meta-analysis. NUTR CLIN METAB 2022. [DOI: 10.1016/j.nupar.2022.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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4
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Mancini NL, Rajeev S, Jayme TS, Wang A, Keita ÅV, Workentine ML, Hamed S, Söderholm JD, Lopes F, Shutt TE, Shearer J, McKay DM. Crohn's Disease Pathobiont Adherent-Invasive E coli Disrupts Epithelial Mitochondrial Networks With Implications for Gut Permeability. Cell Mol Gastroenterol Hepatol 2020; 11:551-571. [PMID: 32992049 PMCID: PMC7797367 DOI: 10.1016/j.jcmgh.2020.09.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Adherent-invasive Escherichia coli are implicated in inflammatory bowel disease, and mitochondrial dysfunction has been observed in biopsy specimens from patients with inflammatory bowel disease. As a novel aspect of adherent-invasive E coli-epithelial interaction, we hypothesized that E coli (strain LF82) would elicit substantial disruption of epithelial mitochondrial form and function. METHODS Monolayers of human colon-derived epithelial cell lines were exposed to E coli-LF82 or commensal E coli and RNA sequence analysis, mitochondrial function (adenosine triphosphate synthesis) and dynamics (mitochondrial network imaging, immunoblotting for fission and fusion proteins), and epithelial permeability (transepithelial resistance, flux of fluorescein isothiocyanate-dextran and bacteria) were assessed. RESULTS E coli-LF82 significantly affected epithelial expression of ∼8600 genes, many relating to mitochondrial function. E coli-LF82-infected epithelia showed swollen mitochondria, reduced mitochondrial membrane potential and adenosine triphosphate, and fragmentation of the mitochondrial network: events not observed with dead E coli-LF82, medium from bacterial cultures, or control E coli. Treatment with Mitochondrial Division Inhibitor 1 (Mdivi1, inhibits dynamin-related peptide 1, guanosine triphosphatase principally responsible for mitochondrial fission) or P110 (prevents dynamin-related peptide 1 binding to mitochondrial fission 1 protein) partially reduced E coli-LF82-induced mitochondrial fragmentation in the short term. E coli-LF82-infected epithelia showed loss of the long isoform of optic atrophy factor 1, which mediates mitochondrial fusion. Mitochondrial Division Inhibitor 1 reduced the magnitude of E coli-LF82-induced increased transepithelial flux of fluorescein isothiocyanate dextran. By 8 hours after infection, increased cytosolic cytochrome C and DNA fragmentation were apparent without evidence of caspase-3 or apoptosis inducing factor activation. CONCLUSIONS Epithelial mitochondrial fragmentation caused by E coli-LF82 could be targeted to maintain cellular homeostasis and mitigate infection-induced loss of epithelial barrier function. Data have been deposited in NCBI's Gene Expression Omnibus and are accessible through GEO series accession numbers GSE154121 and GSE154122 (https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE154121).
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Affiliation(s)
- Nicole L Mancini
- Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Sruthi Rajeev
- Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Timothy S Jayme
- Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Arthur Wang
- Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Åsa V Keita
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | | | - Samira Hamed
- Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Johan D Söderholm
- Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden; Department of Surgery, County Council of Östergötland, Linköping, Sweden
| | - Fernando Lopes
- Institute of Parasitology, Faculty of Agriculture and Environmental Sciences, Department of Microbiology and Immunology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Timothy E Shutt
- Department of Medical Genetics, Alberta Children's Hospital Research Institute, University of Calgary, Alberta, Canada
| | - Jane Shearer
- Department of Biochemistry and Molecular Biology, Faculty of Kinesiology, University of Calgary, Alberta, Canada
| | - Derek M McKay
- Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada.
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5
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Chen J, Zhou Y, Zhuang Y, Qin T, Guo M, Jiang J, Niu J, Li JZ, Chen X, Wang Q. The metabolic regulator small heterodimer partner contributes to the glucose and lipid homeostasis abnormalities induced by hepatitis C virus infection. Metabolism 2019; 100:153954. [PMID: 31400386 DOI: 10.1016/j.metabol.2019.153954] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 07/16/2019] [Accepted: 07/31/2019] [Indexed: 01/02/2023]
Abstract
BACKGROUND Chronic hepatitis C virus (HCV) infection can predispose the host to metabolic abnormalities. The orphan nuclear receptor small heterodimer partner (SHP; NR0B2) has been identified as a key transcriptional regulatory factor of genes involved in diverse metabolic pathways. The protective effects of SHP against HCV-induced hepatic fibrosis have been reported. However, the exact mechanisms of its role on metabolism are largely unknown. We investigated the role of hepatic SHP in regulating glucose and lipid homeostasis, particularly in the metabolic stress response caused by HCV infection. MATERIALS AND METHODS Gluconeogenesis and lipogenesis levels and SHP expression were measured in HCV-infected cells, as well as in liver samples from HCV-infected patients and persistently HCV-infected mice. RESULTS We demonstrated that SHP is involved in gluconeogenesis via the acetylation of the Forkhead box O (FoxO) family transcription factor FoxO1, which is mediated by histone deacetylase 9 (HDAC9). Meanwhile, SHP regulates lipogenesis in the liver via suppressing the induction of sterol regulatory element-binding protein-1c (SREBP-1c) expression by the SUMOylation of Liver X receptor α (LXRα) at the SREBP-1c promoter. In particular, SHP can be strongly reduced upon stimulation, such as by HCV infection. The SHP expression levels were decreased in the livers from the CHC patients and persistently HCV-infected mice, and a negative correlation was observed between the SHP expression levels and gluconeogenic or lipogenic activities, emphasizing the clinical relevance of these results. CONCLUSIONS Our results suggest that SHP is involved in HCV-induced abnormal glucose and lipid homeostasis and that SHP could be a major target for therapeutic interventions targeting HCV-associated metabolic diseases.
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Affiliation(s)
- Jizheng Chen
- State Key Lab of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Yue Zhou
- Department of Thoracic Surgery, First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing 210029, China
| | - Yuan Zhuang
- Jiangsu Province Key Lab of Human Functional Genomics, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing 210029, China
| | - Tian Qin
- Jiangsu Province Key Lab of Human Functional Genomics, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing 210029, China
| | - Min Guo
- State Key Lab of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Jing Jiang
- Department of Hepatology, The First Hospital of Jilin University, Changchun 130021, China
| | - Junqi Niu
- Department of Hepatology, The First Hospital of Jilin University, Changchun 130021, China
| | - John Zhong Li
- Jiangsu Province Key Lab of Human Functional Genomics, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing 210029, China.
| | - Xinwen Chen
- State Key Lab of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Qian Wang
- Jiangsu Province Key Lab of Human Functional Genomics, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing 210029, China.
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6
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Hou F, Wei W, Qin X, Liang J, Han S, Han A, Kong Q. The posttranslational modification of HDAC4 in cell biology: Mechanisms and potential targets. J Cell Biochem 2019; 121:930-937. [PMID: 31588631 DOI: 10.1002/jcb.29365] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 08/20/2019] [Indexed: 12/15/2022]
Abstract
Histone deacetylase 4 (HDAC4) is a member of the HDACs family, its expression is closely related to the cell development. The cell is an independent living entity that undergoes proliferation, differentiation, senescence, apoptosis, and pathology, and each process has a strict and complex regulatory system. With deepening of its research, the expression of HDAC4 is critical in the life process. This review focuses on the posttranslational modification of HDAC4 in cell biology, providing an important target for future disease treatment.
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Affiliation(s)
- Fei Hou
- Lupus Research Institute, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, China.,Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong, Jining, China
| | - Wei Wei
- Lupus Research Institute, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, China.,Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong, Jining, China
| | - Xiao Qin
- Lupus Research Institute, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, China.,Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong, Jining, China
| | - Jing Liang
- Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong, Jining, China.,College of Life Sciences, Qufu Normal University, Qufu, China
| | - Sha Han
- Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong, Jining, China
| | - Aizhong Han
- Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong, Jining, China
| | - Qingsheng Kong
- Collaborative Innovation Center for Birth Defect Research and Transformation of Shandong, Jining, China
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7
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Simillion C, Semmo N, Idle JR, Beyoğlu D. Robust Regression Analysis of GCMS Data Reveals Differential Rewiring of Metabolic Networks in Hepatitis B and C Patients. Metabolites 2017; 7:metabo7040051. [PMID: 28991180 PMCID: PMC5746731 DOI: 10.3390/metabo7040051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 09/30/2017] [Accepted: 10/05/2017] [Indexed: 12/17/2022] Open
Abstract
About one in 15 of the world’s population is chronically infected with either hepatitis virus B (HBV) or C (HCV), with enormous public health consequences. The metabolic alterations caused by these infections have never been directly compared and contrasted. We investigated groups of HBV-positive, HCV-positive, and uninfected healthy controls using gas chromatography-mass spectrometry analyses of their plasma and urine. A robust regression analysis of the metabolite data was conducted to reveal correlations between metabolite pairs. Ten metabolite correlations appeared for HBV plasma and urine, with 18 for HCV plasma and urine, none of which were present in the controls. Metabolic perturbation networks were constructed, which permitted a differential view of the HBV- and HCV-infected liver. HBV hepatitis was consistent with enhanced glucose uptake, glycolysis, and pentose phosphate pathway metabolism, the latter using xylitol and producing threonic acid, which may also be imported by glucose transporters. HCV hepatitis was consistent with impaired glucose uptake, glycolysis, and pentose phosphate pathway metabolism, with the tricarboxylic acid pathway fueled by branched-chain amino acids feeding gluconeogenesis and the hepatocellular loss of glucose, which most probably contributed to hyperglycemia. It is concluded that robust regression analyses can uncover metabolic rewiring in disease states.
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Affiliation(s)
- Cedric Simillion
- Interfaculty Bioinformatics Unit and SIB Swiss Institute of Bioinformatics, University of Bern, Baltzerstrasse 6, 3012 Bern, Switzerland.
- Department of BioMedical Research, University of Bern, Murtenstrasse 35, 3008 Bern, Switzerland.
| | - Nasser Semmo
- Department of BioMedical Research, University of Bern, Murtenstrasse 35, 3008 Bern, Switzerland.
- Department of Visceral Surgery and Medicine, Department of Hepatology, Inselspital, University Hospital of Bern, 3010 Bern, Switzerland.
| | - Jeffrey R Idle
- Department of BioMedical Research, University of Bern, Murtenstrasse 35, 3008 Bern, Switzerland.
- Department of Visceral Surgery and Medicine, Department of Hepatology, Inselspital, University Hospital of Bern, 3010 Bern, Switzerland.
- Division of Systems Pharmacology and Pharmacogenomics, Samuel J. and Joan B. Williamson Institute, Arnold & Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, 11201 New York, NY, USA.
| | - Diren Beyoğlu
- Department of BioMedical Research, University of Bern, Murtenstrasse 35, 3008 Bern, Switzerland.
- Division of Systems Pharmacology and Pharmacogenomics, Samuel J. and Joan B. Williamson Institute, Arnold & Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, 11201 New York, NY, USA.
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8
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Lerat H, Imache MR, Polyte J, Gaudin A, Mercey M, Donati F, Baudesson C, Higgs MR, Picard A, Magnan C, Foufelle F, Pawlotsky JM. Hepatitis C virus induces a prediabetic state by directly impairing hepatic glucose metabolism in mice. J Biol Chem 2017; 292:12860-12873. [PMID: 28559285 DOI: 10.1074/jbc.m117.785030] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 05/18/2017] [Indexed: 12/15/2022] Open
Abstract
Virus-related type 2 diabetes is commonly observed in individuals infected with the hepatitis C virus (HCV); however, the underlying molecular mechanisms remain unknown. Our aim was to unravel these mechanisms using FL-N/35 transgenic mice expressing the full HCV ORF. We observed that these mice displayed glucose intolerance and insulin resistance. We also found that Glut-2 membrane expression was reduced in FL-N/35 mice and that hepatocyte glucose uptake was perturbed, partly accounting for the HCV-induced glucose intolerance in these mice. Early steps of the hepatic insulin signaling pathway, from IRS2 to PDK1 phosphorylation, were constitutively impaired in FL-N/35 primary hepatocytes via deregulation of TNFα/SOCS3. Higher hepatic glucose production was observed in the HCV mice, despite higher fasting insulinemia, concomitant with decreased expression of hepatic gluconeogenic genes. Akt kinase activity was higher in HCV mice than in WT mice, but Akt-dependent phosphorylation of the forkhead transcription factor FoxO1 at serine 256, which triggers its nuclear exclusion, was lower in HCV mouse livers. These findings indicate an uncoupling of the canonical Akt/FoxO1 pathway in HCV protein-expressing hepatocytes. Thus, the expression of HCV proteins in the liver is sufficient to induce insulin resistance by impairing insulin signaling and glucose uptake. In conclusion, we observed a complete set of events leading to a prediabetic state in HCV-transgenic mice, providing a valuable mechanistic explanation for HCV-induced diabetes in humans.
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Affiliation(s)
- Hervé Lerat
- INSERM, U955, Team "Pathophysiology and Therapy of Chronic Viral Hepatitis and Related Cancers", 94010 Créteil, France; Université Paris-Est Créteil Val de Marne, 94010 Créteil, France.
| | - Mohamed Rabah Imache
- INSERM, U955, Team "Pathophysiology and Therapy of Chronic Viral Hepatitis and Related Cancers", 94010 Créteil, France
| | - Jacqueline Polyte
- INSERM, U955, Team "Pathophysiology and Therapy of Chronic Viral Hepatitis and Related Cancers", 94010 Créteil, France
| | - Aurore Gaudin
- INSERM, U955, Team "Pathophysiology and Therapy of Chronic Viral Hepatitis and Related Cancers", 94010 Créteil, France
| | - Marion Mercey
- INSERM, U955, Team "Pathophysiology and Therapy of Chronic Viral Hepatitis and Related Cancers", 94010 Créteil, France
| | - Flora Donati
- INSERM, U955, Team "Pathophysiology and Therapy of Chronic Viral Hepatitis and Related Cancers", 94010 Créteil, France
| | - Camille Baudesson
- INSERM, U955, Team "Pathophysiology and Therapy of Chronic Viral Hepatitis and Related Cancers", 94010 Créteil, France
| | - Martin R Higgs
- INSERM, U955, Team "Pathophysiology and Therapy of Chronic Viral Hepatitis and Related Cancers", 94010 Créteil, France
| | - Alexandre Picard
- Unité de Biologie Fonctionnelle et Adaptative, Sorbonne Paris Cité, CNRS UMR 8251, Université Paris Diderot, 75013 Paris, France
| | - Christophe Magnan
- Unité de Biologie Fonctionnelle et Adaptative, Sorbonne Paris Cité, CNRS UMR 8251, Université Paris Diderot, 75013 Paris, France
| | - Fabienne Foufelle
- INSERM, UMRS 1138, Centre de Recherche des Cordeliers, 75006 Paris, France
| | - Jean-Michel Pawlotsky
- INSERM, U955, Team "Pathophysiology and Therapy of Chronic Viral Hepatitis and Related Cancers", 94010 Créteil, France; Université Paris-Est Créteil Val de Marne, 94010 Créteil, France; National Reference Center for Viral Hepatitis B, C and Delta, Department of Virology, Hôpital Henri Mondor, AP-HP, 94010 Créteil, France
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9
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Vallianou I, Dafou D, Vassilaki N, Mavromara P, Hadzopoulou-Cladaras M. Hepatitis C virus suppresses Hepatocyte Nuclear Factor 4 alpha, a key regulator of hepatocellular carcinoma. Int J Biochem Cell Biol 2016; 78:315-326. [PMID: 27477312 DOI: 10.1016/j.biocel.2016.07.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 07/20/2016] [Accepted: 07/26/2016] [Indexed: 12/18/2022]
Abstract
Hepatitis C Virus (HCV) infection presents with a disturbed lipid profile and can evolve to hepatic steatosis and hepatocellular carcinoma (HCC). Hepatocyte Nuclear Factor 4 alpha (HNF4α) is the most abundant transcription factor in the liver, a key regulator of hepatic lipid metabolism and a critical determinant of Epithelial to Mesenchymal Transition and hepatic development. We have previously shown that transient inhibition of HNF4α initiates transformation of immortalized hepatocytes through a feedback loop consisting of miR-24, IL6 receptor (IL6R), STAT3, miR-124 and miR-629, suggesting a central role of HNF4α in HCC. However, the role of HNF4α in Hepatitis C Virus (HCV)-related hepatocarcinoma has not been evaluated and remains controversial. In this study, we provide strong evidence suggesting that HCV downregulates HNF4α expression at both transcriptional and translational levels. The observed decrease of HNF4α expression correlated with the downregulation of its downstream targets, HNF1α and MTP. Ectopic overexpression of HCV proteins also exhibited an inhibitory effect on HNF4α levels. The inhibition of HNF4α expression by HCV appeared to be mediated at transcriptional level as HCV proteins suppressed HNF4α gene promoter activity. HCV also up-regulated IL6R, activated STAT3 protein phosphorylation and altered the expression of acute phase genes. Furthermore, as HCV triggered the loss of HNF4α a consequent change of miR-24, miR-629 or miR-124 was observed. Our findings demonstrated that HCV-related HCC could be mediated through HNF4α-microRNA deregulation implying a possible role of HNF4α in HCV hepatocarcinogenesis. HCV inhibition of HNF4α could be sustained to promote HCC.
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Affiliation(s)
- Ioanna Vallianou
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Dimitra Dafou
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Niki Vassilaki
- Molecular Virology Laboratory, Hellenic Pasteur Institute, Athens, Greece
| | - Penelope Mavromara
- Molecular Virology Laboratory, Hellenic Pasteur Institute, Athens, Greece
| | - Margarita Hadzopoulou-Cladaras
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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10
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Seenappa V, Das B, Joshi MB, Satyamoorthy K. Context Dependent Regulation of Human Phosphoenolpyruvate Carboxykinase Isoforms by DNA Promoter Methylation and RNA Stability. J Cell Biochem 2016; 117:2506-20. [DOI: 10.1002/jcb.25543] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 03/15/2016] [Indexed: 12/26/2022]
Affiliation(s)
- Venu Seenappa
- Department of Biotechnology; School of Life Sciences; Manipal University; Manipal India
| | - Bidyadhar Das
- Department of Zoology; Northeast Hill University; Shillong India
| | - Manjunath B. Joshi
- Department of Biotechnology; School of Life Sciences; Manipal University; Manipal India
| | - Kapaettu Satyamoorthy
- Department of Biotechnology; School of Life Sciences; Manipal University; Manipal India
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11
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Kim E, Kim YS, Kim KM, Jung S, Yoo SH, Kim Y. D-Xylose as a sugar complement regulates blood glucose levels by suppressing phosphoenolpyruvate carboxylase (PEPCK) in streptozotocin-nicotinamide-induced diabetic rats and by enhancing glucose uptake in vitro. Nutr Res Pract 2015; 10:11-8. [PMID: 26865911 PMCID: PMC4742304 DOI: 10.4162/nrp.2016.10.1.11] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 04/22/2015] [Accepted: 05/07/2015] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND/OBJECTIVES Type 2 diabetes (T2D) is more frequently diagnosed and is characterized by hyperglycemia and insulin resistance. D-Xylose, a sucrase inhibitor, may be useful as a functional sugar complement to inhibit increases in blood glucose levels. The objective of this study was to investigate the anti-diabetic effects of D-xylose both in vitro and stretpozotocin (STZ)-nicotinamide (NA)-induced models in vivo. MATERIALS/METHODS Wistar rats were divided into the following groups: (i) normal control; (ii) diabetic control; (iii) diabetic rats supplemented with a diet where 5% of the total sucrose content in the diet was replaced with D-xylose; and (iv) diabetic rats supplemented with a diet where 10% of the total sucrose content in the diet was replaced with D-xylose. These groups were maintained for two weeks. The effects of D-xylose on blood glucose levels were examined using oral glucose tolerance test, insulin secretion assays, histology of liver and pancreas tissues, and analysis of phosphoenolpyruvate carboxylase (PEPCK) expression in liver tissues of a STZ-NA-induced experimental rat model. Levels of glucose uptake and insulin secretion by differentiated C2C12 muscle cells and INS-1 pancreatic β-cells were analyzed. RESULTS In vivo, D-xylose supplementation significantly reduced fasting serum glucose levels (P < 0.05), it slightly reduced the area under the glucose curve, and increased insulin levels compared to the diabetic controls. D-Xylose supplementation enhanced the regeneration of pancreas tissue and improved the arrangement of hepatocytes compared to the diabetic controls. Lower levels of PEPCK were detected in the liver tissues of D-xylose-supplemented rats (P < 0.05). In vitro, both 2-NBDG uptake by C2C12 cells and insulin secretion by INS-1 cells were increased with D-xylose supplementation in a dose-dependent manner compared to treatment with glucose alone. CONCLUSIONS In this study, D-xylose exerted anti-diabetic effects in vivo by regulating blood glucose levels via regeneration of damaged pancreas and liver tissues and regulation of PEPCK, a key rate-limiting enzyme in the process of gluconeogenesis. In vitro, D-xylose induced the uptake of glucose by muscle cells and the secretion of insulin cells by β-cells. These mechanistic insights will facilitate the development of highly effective strategy for T2D.
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Affiliation(s)
- Eunju Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Yoo-Sun Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Kyung-Mi Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Sangwon Jung
- R&D center, TS Corporation, Incheon 400-201, Korea
| | - Sang-Ho Yoo
- Department of Food Science & Technology, BK21 Plus Team, and Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Korea
| | - Yuri Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
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Cellular stress responses in hepatitis C virus infection: Mastering a two-edged sword. Virus Res 2015; 209:100-17. [PMID: 25836277 DOI: 10.1016/j.virusres.2015.03.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 03/21/2015] [Accepted: 03/23/2015] [Indexed: 12/11/2022]
Abstract
Hepatitis C virus (HCV) infection affects chronically more than 150 million humans worldwide. Chronic HCV infection causes severe liver disease and hepatocellular carcinoma. While immune response-mediated events are major players in HCV pathogenesis, the impact that viral replication has on cellular homeostasis is increasingly recognized as a necessary contributor to pathological manifestations of HCV infection such as steatosis, insulin-resistance or liver cancer. In this review, we will briefly overview the different cellular stress pathways that are induced by hepatitis C virus infection, the response that the cell promotes to attempt regaining homeostasis or to induce dysfunctional cell death, and how the virus co-opts these response mechanisms to promote both viral replication and survival of the infected cell. We will review the role of unfolded protein and oxidative stress responses as well as the role of auto- and mitophagy in HCV infection. Finally, we will discuss the recent discovery of a cellular chaperone involved in stress responses, the sigma-1 receptor, as a cellular factor required at the onset of HCV infection and the potential molecular events underlying the proviral role of this cellular factor in HCV infection.
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