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Florke Gee RR, Huber AD, Chen T. Regulation of PXR in drug metabolism: chemical and structural perspectives. Expert Opin Drug Metab Toxicol 2024; 20:9-23. [PMID: 38251638 PMCID: PMC10939797 DOI: 10.1080/17425255.2024.2309212] [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: 12/12/2023] [Accepted: 01/19/2024] [Indexed: 01/23/2024]
Abstract
INTRODUCTION Pregnane X receptor (PXR) is a master xenobiotic sensor that transcriptionally controls drug metabolism and disposition pathways. PXR activation by pharmaceutical drugs, natural products, environmental toxins, etc. may decrease drug efficacy and increase drug-drug interactions and drug toxicity, indicating a therapeutic value for PXR antagonists. However, PXR's functions in physiological events, such as intestinal inflammation, indicate that PXR activators may be useful in certain disease contexts. AREAS COVERED We review the reported roles of PXR in various physiological and pathological processes including drug metabolism, cancer, inflammation, energy metabolism, and endobiotic homeostasis. We then highlight specific cellular and chemical routes that modulate PXR activity and discuss the functional consequences. Databases searched and inclusive dates: PubMed, 1 January 1980 to 10 January 2024. EXPERT OPINION Knowledge of PXR's drug metabolism function has helped drug developers produce small molecules without PXR-mediated metabolic liabilities, and further understanding of PXR's cellular functions may offer drug development opportunities in multiple disease settings.
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Affiliation(s)
- Rebecca R. Florke Gee
- Graduate School of Biomedical Sciences, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
| | - Andrew D. Huber
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
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2
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He L, Yang J, Hao Y, Yang X, Shi X, Zhang D, Zhao D, Yan W, Bie X, Chen L, Chen G, Zhao S, Liu X, Zheng H, Zhang K. DDX20: A Multifunctional Complex Protein. Molecules 2023; 28:7198. [PMID: 37894677 PMCID: PMC10608988 DOI: 10.3390/molecules28207198] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/18/2023] [Accepted: 09/28/2023] [Indexed: 10/29/2023] Open
Abstract
DEAD-box decapping enzyme 20 (DDX20) is a putative RNA-decapping enzyme that can be identified by the conserved motif Asp-Glu-Ala-Asp (DEAD). Cellular processes involve numerous RNA secondary structure alterations, including translation initiation, nuclear and mitochondrial splicing, and assembly of ribosomes and spliceosomes. DDX20 reportedly plays an important role in cellular transcription and post-transcriptional modifications. On the one hand, DDX20 can interact with various transcription factors and repress the transcriptional process. On the other hand, DDX20 forms the survival motor neuron complex and participates in the assembly of snRNP, ultimately affecting the RNA splicing process. Finally, DDX20 can potentially rely on its RNA-unwinding enzyme function to participate in microRNA (miRNA) maturation and act as a component of the RNA-induced silencing complex. In addition, although DDX20 is not a key component in the innate immune system signaling pathway, it can affect the nuclear factor kappa B (NF-κB) and p53 signaling pathways. In particular, DDX20 plays different roles in tumorigenesis development through the NF-κB signaling pathway. This process is regulated by various factors such as miRNA. DDX20 can influence processes such as viral replication in cells by interacting with two proteins in Epstein-Barr virus and can regulate the replication process of several viruses through the innate immune system, indicating that DDX20 plays an important role in the innate immune system. Herein, we review the effects of DDX20 on the innate immune system and its role in transcriptional and post-transcriptional modification processes, based on which we provide an outlook on the future of DDX20 research in innate immunity and viral infections.
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Affiliation(s)
- Lu He
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Jinke Yang
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Yu Hao
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Xing Yang
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Xijuan Shi
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Dajun Zhang
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Dengshuai Zhao
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Wenqian Yan
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Xintian Bie
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Lingling Chen
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Guohui Chen
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Siyue Zhao
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Xiangtao Liu
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Haixue Zheng
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
| | - Keshan Zhang
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou 730046, China
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3
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Alfaro AJ, Dittner C, Becker J, Loft A, Mhamane A, Maida A, Georgiadi A, Tsokanos F, Klepac K, Molocea C, El‐Merahbi R, Motzler K, Geppert J, Karikari RA, Szendrödi J, Feuchtinger A, Hofmann S, Karaca S, Urlaub H, Berriel Diaz M, Melchior F, Herzig S. Fasting-sensitive SUMO-switch on Prox1 controls hepatic cholesterol metabolism. EMBO Rep 2023; 24:e55981. [PMID: 37560809 PMCID: PMC10561358 DOI: 10.15252/embr.202255981] [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: 08/17/2022] [Revised: 07/12/2023] [Accepted: 07/27/2023] [Indexed: 08/11/2023] Open
Abstract
Accumulation of excess nutrients hampers proper liver function and is linked to nonalcoholic fatty liver disease (NAFLD) in obesity. However, the signals responsible for an impaired adaptation of hepatocytes to obesogenic dietary cues remain still largely unknown. Post-translational modification by the small ubiquitin-like modifier (SUMO) allows for a dynamic regulation of numerous processes including transcriptional reprogramming. We demonstrate that specific SUMOylation of transcription factor Prox1 represents a nutrient-sensitive determinant of hepatic fasting metabolism. Prox1 is highly SUMOylated on lysine 556 in the liver of ad libitum and refed mice, while this modification is abolished upon fasting. In the context of diet-induced obesity, Prox1 SUMOylation becomes less sensitive to fasting cues. The hepatocyte-selective knock-in of a SUMOylation-deficient Prox1 mutant into mice fed a high-fat/high-fructose diet leads to a reduction of systemic cholesterol levels, associated with the induction of liver bile acid detoxifying pathways during fasting. The generation of tools to maintain the nutrient-sensitive SUMO-switch on Prox1 may thus contribute to the development of "fasting-based" approaches for the preservation of metabolic health.
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Affiliation(s)
- Ana Jimena Alfaro
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Claudia Dittner
- Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH)Heidelberg University, DKFZ‐ZMBH AllianceHeidelbergGermany
| | - Janina Becker
- Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH)Heidelberg University, DKFZ‐ZMBH AllianceHeidelbergGermany
| | - Anne Loft
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
- Center for Functional Genomics and Tissue Plasticity (ATLAS), SDUOdenseDenmark
| | - Amit Mhamane
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Adriano Maida
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Anastasia Georgiadi
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Foivos‐Filippos Tsokanos
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Katarina Klepac
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Claudia‐Eveline Molocea
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Rabih El‐Merahbi
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Karsten Motzler
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Julia Geppert
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Rhoda Anane Karikari
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Julia Szendrödi
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | | | - Susanna Hofmann
- Institute of Diabetes and Regeneration ResearchHelmholtz MunichNeuherbergGermany
| | - Samir Karaca
- Bioanalytical Mass Spectrometry GroupMax Planck Institute for Multidisciplinary SciencesGöttingenGermany
| | - Henning Urlaub
- Bioanalytical Mass Spectrometry GroupMax Planck Institute for Multidisciplinary SciencesGöttingenGermany
- Bioanalytics, Institute of Clinical ChemistryUniversity Medical Center GöttingenGöttingenGermany
| | - Mauricio Berriel Diaz
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
| | - Frauke Melchior
- Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH)Heidelberg University, DKFZ‐ZMBH AllianceHeidelbergGermany
| | - Stephan Herzig
- Institute for Diabetes and CancerHelmholtz MunichNeuherbergGermany
- Joint Heidelberg‐IDC Translational Diabetes Program, Inner Medicine 1Heidelberg University HospitalHeidelbergGermany
- German Center for Diabetes Research (DZD), and German Center for Cardiovascular Disease (DZHK)NeuherbergGermany
- Chair Molecular Metabolic ControlTechnical University MunichMunichGermany
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Borin C, Pieters T, Serafin V, Ntziachristos P. Emerging Epigenetic and Posttranslational Mechanisms Controlling Resistance to Glucocorticoids in Acute Lymphoblastic Leukemia. Hemasphere 2023; 7:e916. [PMID: 37359189 PMCID: PMC10289758 DOI: 10.1097/hs9.0000000000000916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 05/16/2023] [Indexed: 06/28/2023] Open
Abstract
Glucocorticoids are extensively used for the treatment of acute lymphoblastic leukemia as they pressure cancer cells to undergo apoptosis. Nevertheless, glucocorticoid partners, modifications, and mechanisms of action are hitherto poorly characterized. This hampers our understanding of therapy resistance, frequently occurring in leukemia despite the current therapeutic combinations using glucocorticoids in acute lymphoblastic leukemia. In this review, we initially cover the traditional view of glucocorticoid resistance and ways of targeting this resistance. We discuss recent progress in our understanding of chromatin and posttranslational properties of the glucocorticoid receptor that might be proven beneficial in our efforts to understand and target therapy resistance. We discuss emerging roles of pathways and proteins such as the lymphocyte-specific kinase that antagonizes glucocorticoid receptor activation and nuclear translocation. In addition, we provide an overview of ongoing therapeutic approaches that sensitize cells to glucocorticoids including small molecule inhibitors and proteolysis-targeting chimeras.
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Affiliation(s)
- Cristina Borin
- Department of Biomolecular Medicine, Ghent University, Belgium
- Center for Medical Genetics, Ghent University and University Hospital, Belgium
- Cancer Research Institute Ghent (CRIG), Belgium
| | - Tim Pieters
- Department of Biomolecular Medicine, Ghent University, Belgium
- Center for Medical Genetics, Ghent University and University Hospital, Belgium
- Cancer Research Institute Ghent (CRIG), Belgium
| | - Valentina Serafin
- Department of Surgery Oncology and Gastroenterology, Oncology and Immunology Section, University of Padova, Italy
| | - Panagiotis Ntziachristos
- Department of Biomolecular Medicine, Ghent University, Belgium
- Center for Medical Genetics, Ghent University and University Hospital, Belgium
- Cancer Research Institute Ghent (CRIG), Belgium
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5
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Takamura H, Nakayama Y, Ito H, Katayama T, Fraser PE, Matsuzaki S. SUMO1 Modification of Tau in Progressive Supranuclear Palsy. Mol Neurobiol 2022; 59:4419-4435. [PMID: 35567706 PMCID: PMC9167224 DOI: 10.1007/s12035-022-02734-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 01/04/2022] [Indexed: 12/03/2022]
Abstract
Small ubiquitin-like modifiers (SUMO) have been implicated in several neurodegenerative diseases. SUMO1 conjugation has been shown to promote aggregation and regulate phosphorylation of the tau protein linked to Alzheimer’s disease and related tauopathies. The current study has demonstrated that SUMO1 co-localizes with intraneuronal tau inclusions in progressive supranuclear palsy (PSP). Immunoprecipitation of isolated and solubilized tau fibrils from PSP tissues revealed SUMO1 conjugation to a cleaved and N-terminally truncated tau. The effects of SUMOylation were examined using tau-SUMO fusion proteins which showed a higher propensity for tau oligomerization of PSP-truncated tau and accumulation on microtubules as compared to the full-length protein. This was found to be specific for SUMO1 as the corresponding SUMO2 fusion protein did not display a significantly altered cytoplasmic distribution or aggregation of tau. Blocking proteasome-mediated degradation promoted the aggregation of the tau fusion proteins with the greatest effect observed for truncated tau-SUMO1. The SUMO1 modification of the truncated tau in PSP may represent a detrimental event that promotes aggregation and impedes the ability of cells to remove the resulting protein deposits. This combination of tau truncation and SUMO1 modification may be a contributing factor in PSP pathogenesis.
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Affiliation(s)
- Hironori Takamura
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada.,Department of Child Development & Molecular Brain Science, Center for Child Mental Development, United Graduate School of Child Development, Osaka University, Osaka, Japan
| | - Yoshiaki Nakayama
- Department of Neurology, Wakayama Medical University, Wakayama, Japan
| | - Hidefumi Ito
- Department of Neurology, Wakayama Medical University, Wakayama, Japan
| | - Taiichi Katayama
- Department of Child Development & Molecular Brain Science, Center for Child Mental Development, United Graduate School of Child Development, Osaka University, Osaka, Japan
| | - Paul E Fraser
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - Shinsuke Matsuzaki
- Department of Child Development & Molecular Brain Science, Center for Child Mental Development, United Graduate School of Child Development, Osaka University, Osaka, Japan. .,Department of Radiological Sciences, Faculty of Health Sciences, Morinomiya University of Medical Sciences, Osaka, Japan.
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Mondal P, Tiwary N, Sengupta A, Dhang S, Roy S, Das C. Epigenetic Reprogramming of the Glucose Metabolic Pathways by the Chromatin Effectors During Cancer. Subcell Biochem 2022; 100:269-336. [PMID: 36301498 DOI: 10.1007/978-3-031-07634-3_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] [Indexed: 06/16/2023]
Abstract
Glucose metabolism plays a vital role in regulating cellular homeostasis as it acts as the central axis for energy metabolism, alteration in which may lead to serious consequences like metabolic disorders to life-threatening diseases like cancer. Malignant cells, on the other hand, help in tumor progression through abrupt cell proliferation by adapting to the changed metabolic milieu. Metabolic intermediates also vary from normal cells to cancerous ones to help the tumor manifestation. However, metabolic reprogramming is an important phenomenon of cells through which they try to maintain the balance between normal and carcinogenic outcomes. In this process, transcription factors and chromatin modifiers play an essential role to modify the chromatin landscape of important genes related directly or indirectly to metabolism. Our chapter surmises the importance of glucose metabolism and the role of metabolic intermediates in the cell. Also, we summarize the influence of histone effectors in reprogramming the cancer cell metabolism. An interesting aspect of this chapter includes the detailed methods to detect the aberrant metabolic flux, which can be instrumental for the therapeutic regimen of cancer.
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Affiliation(s)
- Payel Mondal
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India
- Homi Bhaba National Institute, Mumbai, India
| | - Niharika Tiwary
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India
| | - Amrita Sengupta
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India
| | - Sinjini Dhang
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Siddhartha Roy
- Structural Biology & Bio-Informatics Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Chandrima Das
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India.
- Homi Bhaba National Institute, Mumbai, India.
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7
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Rogers RS, Parker A, Vainer PD, Elliott E, Sudbeck D, Parimi K, Peddada VP, Howe PG, D’Ambrosio N, Ruddy G, Stackable K, Carney M, Martin L, Osterholt T, Staudinger JL. The Interface between Cell Signaling Pathways and Pregnane X Receptor. Cells 2021; 10:cells10113262. [PMID: 34831484 PMCID: PMC8617909 DOI: 10.3390/cells10113262] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 12/19/2022] Open
Abstract
Highly expressed in the enterohepatic system, pregnane X receptor (PXR, NR1I2) is a well-characterized nuclear receptor (NR) that regulates the expression of genes in the liver and intestines that encode key drug metabolizing enzymes and drug transporter proteins in mammals. The net effect of PXR activation is to increase metabolism and clear drugs and xenobiotics from the body, producing a protective effect and mediating clinically significant drug interaction in patients on combination therapy. The complete understanding of PXR biology is thus important for the development of safe and effective therapeutic strategies. Furthermore, PXR activation is now known to specifically transrepress the inflammatory- and nutrient-signaling pathways of gene expression, thereby providing a mechanism for linking these signaling pathways together with enzymatic drug biotransformation pathways in the liver and intestines. Recent research efforts highlight numerous post-translational modifications (PTMs) which significantly influence the biological function of PXR. However, this thrust of research is still in its infancy. In the context of gene-environment interactions, we present a review of the recent literature that implicates PXR PTMs in regulating its clinically relevant biology. We also provide a discussion of how these PTMs likely interface with each other to respond to extracellular cues to appropriately modify PXR activity.
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Affiliation(s)
- Robert S. Rogers
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Annemarie Parker
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Phill D. Vainer
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Elijah Elliott
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Dakota Sudbeck
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Kaushal Parimi
- Thomas Jefferson Independent Day School, Joplin, MO 64801, USA;
| | - Venkata P. Peddada
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Parker G. Howe
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Nick D’Ambrosio
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Gregory Ruddy
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Kaitlin Stackable
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Megan Carney
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Lauren Martin
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Thomas Osterholt
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
| | - Jeff L. Staudinger
- Division of Basic Sciences, Farber-McIntire Campus, College of Osteopathic Medicine, Kansas City University, Joplin, MO 64804, USA; (R.S.R.); (A.P.); (P.D.V.); (E.E.); (D.S.); (V.P.P.); (P.G.H.); (G.R.); (K.S.); (M.C.); (L.M.); (T.O.)
- Correspondence:
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8
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Krishna AP, John S, Shinde PL, Mishra R. Proteo-transcriptomics meta-analysis identifies SUMO2 as a promising target in glioblastoma multiforme therapeutics. Cancer Cell Int 2021; 21:575. [PMID: 34715855 PMCID: PMC8555349 DOI: 10.1186/s12935-021-02279-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 10/18/2021] [Indexed: 11/10/2022] Open
Abstract
Background Glioblastoma multiforme (GBM) is a deadly brain tumour with minimal survival rates due to the ever-expanding heterogeneity, chemo and radioresistance. Kinases are known to crucially drive GBM pathology; however, a rationale therapeutic combination that can simultaneously inhibit multiple kinases has not yet emerged successfully. Results Here, we analyzed the GBM patient data from several publicly available repositories and deduced hub GBM kinases, most of which were identified to be SUMOylated by SUMO2/3 isoforms. Not only the hub kinases but a significant proportion of GBM upregulated genes involved in proliferation, metastasis, invasion, epithelial-mesenchymal transition, stemness, DNA repair, stromal and macrophages maintenance were also identified to be the targets of SUMO2 isoform. Correlatively, high expression of SUMO2 isoform was found to be significantly associated with poor patient survival. Conclusions Although many natural products and drugs are evidenced to target general SUMOylation, however, our meta-analysis strongly calls for the need to design SUMO2/3 or even better SUMO2 specific inhibitors and also explore the SUMO2 transcription inhibitors for universally potential, physiologically non-toxic anti-GBM drug therapy. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12935-021-02279-y. The major highlights of this study are as follows:Key upregulated hub kinases and coding genes in GBM are found to be targets of SUMO2 conjugation. SUMO2 is significantly expressed in adult primary and recurrent GBMs as well as in pediatric GBM tumours. Orthotropic xenografts from adult and pediatric GBMs confirm high expression of SUMO2 in GBM tumour samples. SUMO2 is significantly associated with patient survival plot and pan-cancer cell fitness. Rationale design of SUMO2 inhibitors or search for its transcriptional inhibitors is urgently required through industry-academia collaboration for an anti-GBM and potentially pan-cancer therapeutics.
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Affiliation(s)
- Aswani P Krishna
- Brain and Cerebro-Vascular Mechanobiology Research, Laboratory of Translational Mechanobiology, Department of Neurobiology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, 695014, Kerala, India
| | - Sebastian John
- Brain and Cerebro-Vascular Mechanobiology Research, Laboratory of Translational Mechanobiology, Department of Neurobiology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, 695014, Kerala, India.,Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Puja Laxmanrao Shinde
- Brain and Cerebro-Vascular Mechanobiology Research, Laboratory of Translational Mechanobiology, Department of Neurobiology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, 695014, Kerala, India
| | - Rashmi Mishra
- Brain and Cerebro-Vascular Mechanobiology Research, Laboratory of Translational Mechanobiology, Department of Neurobiology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, 695014, Kerala, India.
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9
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Gagnon J, Caron V, Gyenizse L, Tremblay A. Atypic SUMOylation of Nor1/NR4A3 regulates neural cell viability and redox sensitivity. FASEB J 2021; 35:e21827. [PMID: 34383980 DOI: 10.1096/fj.202100395r] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 06/30/2021] [Accepted: 07/15/2021] [Indexed: 11/11/2022]
Abstract
Neuron-derived orphan receptor 1, NR4A3 (Nor1)/NR4A3 is an orphan nuclear receptor involved in the transcriptional control of developmental and neurological functions. Oxidative stress-induced conditions are primarily associated with neurological defects in humans, yet the impact on Nor1-mediated transcription of neuronal genes remains with unknown mechanism. Here, we demonstrate that Nor1 is a non-conventional target of SUMO2/3 conjugation at Lys-137 contained in an atypic ψKxSP motif referred to as the pSuM. Nor1 pSuM SUMOylation differs from the canonical process with the obligate phosphorylation of Ser-139 by Ras signaling to create the required negatively charged interface for SUMOylation. Additional phosphorylation at sites flanking the pSuM is also mediated by the coordinated action of protein kinase casein kinase 2 to function as a small ubiquitin-like modifier enhancer, regulating Nor1-mediated transcription and proteasomal degradation. Nor1 responsive genes involved in cell proliferation and metabolism, such as activating transcription factor 3, cyclin D1, CASP8 and FADD-like apoptosis regulator, and enolase 3 were upregulated in response to pSuM disruption in mouse HT-22 hippocampal neuronal cells and human neuroblastoma SH-SY5Y cells. We also identified critical antioxidant genes, such as catalase, superoxide dismutase 1, and microsomal glutathione S-transferase 2, as responsive targets of Nor1 under pSuM regulation. Nor1 SUMOylation impaired gene transcription through less effective Nor1 chromatin binding and reduced enrichment of histone H3K27ac marks to gene promoters. These effects resulted in decreased neuronal cell growth, increased apoptosis, and reduced survival to oxidative stress damage, underlying the role of pSuM-modified Nor1 in redox homeostasis. Our findings uncover a hierarchical post-translational mechanism that dictates Nor1 non-canonical SUMOylation, disrupting Nor1 transcriptional competence, and neuroprotective redox sensitivity.
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Affiliation(s)
- Jonathan Gagnon
- Research Center, CHU Sainte-Justine, Montréal, Québec, Canada.,Department of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Montreal, Montréal, Québec, Canada
| | - Véronique Caron
- Research Center, CHU Sainte-Justine, Montréal, Québec, Canada
| | - Laurent Gyenizse
- Research Center, CHU Sainte-Justine, Montréal, Québec, Canada.,Department of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Montreal, Montréal, Québec, Canada
| | - André Tremblay
- Research Center, CHU Sainte-Justine, Montréal, Québec, Canada.,Department of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Montreal, Montréal, Québec, Canada.,Centre de Recherche en Reproduction et Fertilité, University of Montreal, Saint-Hyacinthe, Québec, Canada.,Department of Obstetrics & Gynecology, Faculty of Medicine, University of Montreal, Montréal, Québec, Canada
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10
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Sun Y, Demagny H, Schoonjans K. Emerging functions of the nuclear receptor LRH-1 in liver physiology and pathology. Biochim Biophys Acta Mol Basis Dis 2021; 1867:166145. [PMID: 33862147 DOI: 10.1016/j.bbadis.2021.166145] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/30/2021] [Accepted: 04/08/2021] [Indexed: 02/06/2023]
Abstract
Nuclear receptors play pleiotropic roles in cell differentiation, development, proliferation, and metabolic processes to govern liver physiology and pathology. The nuclear receptor, liver receptor homolog-1 (LRH-1, NR5A2), originally identified in the liver as a regulator of bile acid and cholesterol homeostasis, was recently recognized to coordinate a multitude of other hepatic metabolic processes, including glucose and lipid processing, methyl group sensing, and cellular stress responses. In this review, we summarize the physiological and pathophysiological functions of LRH-1 in the liver, as well as the molecular mechanisms underlying these processes. This review also focuses on the recent advances highlighting LRH-1 as an attractive target for liver-associated diseases, such as non-alcoholic fatty liver disease (NAFLD) and hepatocellular carcinoma (HCC).
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Affiliation(s)
- Yu Sun
- Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Hadrien Demagny
- Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Kristina Schoonjans
- Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
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11
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Paakinaho V, Lempiäinen JK, Sigismondo G, Niskanen EA, Malinen M, Jääskeläinen T, Varjosalo M, Krijgsveld J, Palvimo J. SUMOylation regulates the protein network and chromatin accessibility at glucocorticoid receptor-binding sites. Nucleic Acids Res 2021; 49:1951-1971. [PMID: 33524141 PMCID: PMC7913686 DOI: 10.1093/nar/gkab032] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 01/07/2021] [Accepted: 01/12/2021] [Indexed: 12/13/2022] Open
Abstract
Glucocorticoid receptor (GR) is an essential transcription factor (TF), controlling metabolism, development and immune responses. SUMOylation regulates chromatin occupancy and target gene expression of GR in a locus-selective manner, but the mechanism of regulation has remained elusive. Here, we identify the protein network around chromatin-bound GR by using selective isolation of chromatin-associated proteins and show that the network is affected by receptor SUMOylation, with several nuclear receptor coregulators and chromatin modifiers preferring interaction with SUMOylation-deficient GR and proteins implicated in transcriptional repression preferring interaction with SUMOylation-competent GR. This difference is reflected in our chromatin binding, chromatin accessibility and gene expression data, showing that the SUMOylation-deficient GR is more potent in binding and opening chromatin at glucocorticoid-regulated enhancers and inducing expression of target loci. Blockage of SUMOylation by a SUMO-activating enzyme inhibitor (ML-792) phenocopied to a large extent the consequences of GR SUMOylation deficiency on chromatin binding and target gene expression. Our results thus show that SUMOylation modulates the specificity of GR by regulating its chromatin protein network and accessibility at GR-bound enhancers. We speculate that many other SUMOylated TFs utilize a similar regulatory mechanism.
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Affiliation(s)
- Ville Paakinaho
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | | | | | - Einari A Niskanen
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Marjo Malinen
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Tiina Jääskeläinen
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Markku Varjosalo
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Jeroen Krijgsveld
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Heidelberg University, Medical Faculty, Heidelberg, Germany
| | - Jorma J Palvimo
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
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12
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Appelman MD, van der Veen SW, van Mil SWC. Post-Translational Modifications of FXR; Implications for Cholestasis and Obesity-Related Disorders. Front Endocrinol (Lausanne) 2021; 12:729828. [PMID: 34646233 PMCID: PMC8503269 DOI: 10.3389/fendo.2021.729828] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 07/30/2021] [Indexed: 12/12/2022] Open
Abstract
The Farnesoid X receptor (FXR) is a nuclear receptor which is activated by bile acids. Bile acids function in solubilization of dietary fats and vitamins in the intestine. In addition, bile acids have been increasingly recognized to act as signaling molecules involved in energy metabolism pathways, amongst others via activating FXR. Upon activation by bile acids, FXR controls the expression of many genes involved in bile acid, lipid, glucose and amino acid metabolism. An inability to properly use and store energy substrates may predispose to metabolic disorders, such as obesity, diabetes, cholestasis and non-alcoholic fatty liver disease. These diseases arise through a complex interplay between genetics, environment and nutrition. Due to its function in metabolism, FXR is an attractive treatment target for these disorders. The regulation of FXR expression and activity occurs both at the transcriptional and at the post-transcriptional level. It has been shown that FXR can be phosphorylated, SUMOylated and acetylated, amongst other modifications, and that these modifications have functional consequences for DNA and ligand binding, heterodimerization and subcellular localization of FXR. In addition, these post-translational modifications may selectively increase or decrease transcription of certain target genes. In this review, we provide an overview of the posttranslational modifications of FXR and discuss their potential involvement in cholestatic and metabolic disorders.
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13
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Jung H, Chen J, Hu X, Sun H, Wu SY, Chiang CM, Kemper B, Chen LF, Kemper JK. BRD4 inhibition and FXR activation, individually beneficial in cholestasis, are antagonistic in combination. JCI Insight 2020; 6:141640. [PMID: 33290278 PMCID: PMC7821603 DOI: 10.1172/jci.insight.141640] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 11/25/2020] [Indexed: 12/14/2022] Open
Abstract
Activation of farnesoid X receptor (FXR) by obeticholic acid (OCA) reduces hepatic inflammation and fibrosis in patients with primary biliary cholangitis (PBC), a life-threatening cholestatic liver failure. Inhibition of bromodomain-containing protein 4 (BRD4) also has antiinflammatory, antifibrotic effects in mice. We determined the role of BRD4 in FXR function in bile acid (BA) regulation and examined whether the known beneficial effects of OCA are enhanced by inhibiting BRD4 in cholestatic mice. Liver-specific downregulation of BRD4 disrupted BA homeostasis in mice, and FXR-mediated regulation of BA-related genes, including small heterodimer partner and cholesterol 7 alpha-hydroxylase, was BRD4 dependent. In cholestatic mice, JQ1 or OCA treatment ameliorated hepatotoxicity, inflammation, and fibrosis, but surprisingly, was antagonistic in combination. Mechanistically, OCA increased binding of FXR, and the corepressor silencing mediator of retinoid and thyroid hormone receptor (SMRT) decreased NF-κB binding at inflammatory genes and repressed the genes in a BRD4-dependent manner. In patients with PBC, hepatic expression of FXR and BRD4 was significantly reduced. In conclusion, BRD4 is a potentially novel cofactor of FXR for maintaining BA homeostasis and hepatoprotection. Although BRD4 promotes hepatic inflammation and fibrosis in cholestasis, paradoxically, BRD4 is required for the antiinflammatory, antifibrotic actions of OCA-activated FXR. Cotreatment with OCA and JQ1, individually beneficial, may be antagonistic in treatment of liver disease patients with inflammation and fibrosis complications.
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Affiliation(s)
| | - Jinjing Chen
- Department of Molecular and Integrative Physiology and
| | - Xiangming Hu
- Department of Biochemistry, School of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Hao Sun
- Department of Molecular and Integrative Physiology and
| | - Shwu-Yuan Wu
- Harold C. Simmons Comprehensive Cancer Center, Department of Biochemistry, and Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Cheng-Ming Chiang
- Harold C. Simmons Comprehensive Cancer Center, Department of Biochemistry, and Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Byron Kemper
- Department of Molecular and Integrative Physiology and
| | - Lin-Feng Chen
- Department of Biochemistry, School of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.,Carl R. Woese Institute of Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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14
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Geiger MA, Guillaumon AT, Paneni F, Matter CM, Stein S. Role of the Nuclear Receptor Corepressor 1 (NCOR1) in Atherosclerosis and Associated Immunometabolic Diseases. Front Immunol 2020; 11:569358. [PMID: 33117357 PMCID: PMC7578257 DOI: 10.3389/fimmu.2020.569358] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 09/24/2020] [Indexed: 11/13/2022] Open
Abstract
Atherosclerotic cardiovascular disease is part of chronic immunometabolic disorders such as type 2 diabetes and nonalcoholic fatty liver disease. Their common risk factors comprise hypertension, insulin resistance, visceral obesity, and dyslipidemias, such as hypercholesterolemia and hypertriglyceridemia, which are part of the metabolic syndrome. Immunometabolic diseases include chronic pathologies that are affected by both metabolic and inflammatory triggers and mediators. Important and challenging questions in this context are to reveal how metabolic triggers and their downstream signaling affect inflammatory processes and vice-versa. Along these lines, specific nuclear receptors sense changes in lipid metabolism and in turn induce downstream inflammatory and metabolic processes. The transcriptional activity of these nuclear receptors is regulated by the nuclear receptor corepressors (NCORs), including NCOR1. In this review we describe the function of NCOR1 as a central immunometabolic regulator and focus on its role in atherosclerosis and associated immunometabolic diseases.
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Affiliation(s)
- Martin A Geiger
- Vascular Diseases Discipline, Clinics Hospital of the University of Campinas, Campinas, Brazil
| | - Ana T Guillaumon
- Vascular Diseases Discipline, Clinics Hospital of the University of Campinas, Campinas, Brazil
| | - Francesco Paneni
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland.,Department of Cardiology, University Heart Center, University Hospital Zurich, Zurich, Switzerland.,Department of Research and Education, University Hospital Zurich, Zurich, Switzerland
| | - Christian M Matter
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland.,Department of Cardiology, University Heart Center, University Hospital Zurich, Zurich, Switzerland
| | - Sokrates Stein
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland.,Department of Cardiology, University Heart Center, University Hospital Zurich, Zurich, Switzerland
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15
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Not So Slim Anymore-Evidence for the Role of SUMO in the Regulation of Lipid Metabolism. Biomolecules 2020; 10:biom10081154. [PMID: 32781719 PMCID: PMC7466032 DOI: 10.3390/biom10081154] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/31/2020] [Accepted: 08/03/2020] [Indexed: 12/11/2022] Open
Abstract
One of the basic building blocks of all life forms are lipids—biomolecules that dissolve in nonpolar organic solvents but not in water. Lipids have numerous structural, metabolic, and regulative functions in health and disease; thus, complex networks of enzymes coordinate the different compositions and functions of lipids with the physiology of the organism. One type of control on the activity of those enzymes is the conjugation of the Small Ubiquitin-like Modifier (SUMO) that in recent years has been identified as a critical regulator of many biological processes. In this review, I summarize the current knowledge about the role of SUMO in the regulation of lipid metabolism. In particular, I discuss (i) the role of SUMO in lipid metabolism of fungi and invertebrates; (ii) the function of SUMO as a regulator of lipid metabolism in mammals with emphasis on the two most well-characterized cases of SUMO regulation of lipid homeostasis. These include the effect of SUMO on the activity of two groups of master regulators of lipid metabolism—the Sterol Regulatory Element Binding Protein (SERBP) proteins and the family of nuclear receptors—and (iii) the role of SUMO as a regulator of lipid metabolism in arteriosclerosis, nonalcoholic fatty liver, cholestasis, and other lipid-related human diseases.
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16
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Orliaguet L, Dalmas E, Drareni K, Venteclef N, Alzaid F. Mechanisms of Macrophage Polarization in Insulin Signaling and Sensitivity. Front Endocrinol (Lausanne) 2020; 11:62. [PMID: 32140136 PMCID: PMC7042402 DOI: 10.3389/fendo.2020.00062] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 01/30/2020] [Indexed: 12/11/2022] Open
Abstract
Type-2 diabetes (T2D) is a disease of two etiologies: metabolic and inflammatory. At the cross-section of these etiologies lays the phenomenon of metabolic inflammation. Whilst metabolic inflammation is characterized as systemic, a common starting point is the tissue-resident macrophage, who's successful physiological or aberrant pathological adaptation to its microenvironment determines disease course and severity. This review will highlight the key mechanisms in macrophage polarization, inflammatory and non-inflammatory signaling that dictates the development and progression of insulin resistance and T2D. We first describe the known homeostatic functions of tissue macrophages in insulin secreting and major insulin sensitive tissues. Importantly we highlight the known mechanisms of aberrant macrophage activation in these tissues and the ways in which this leads to impairment of insulin sensitivity/secretion and the development of T2D. We next describe the cellular mechanisms that are known to dictate macrophage polarization. We review recent progress in macrophage bio-energetics, an emerging field of research that places cellular metabolism at the center of immune-effector function. Importantly, following the advent of the metabolically-activated macrophage, we cover the known transcriptional and epigenetic factors that canonically and non-canonically dictate macrophage differentiation and inflammatory polarization. In closing perspectives, we discuss emerging research themes and highlight novel non-inflammatory or non-immune roles that tissue macrophages have in maintaining microenvironmental and systemic homeostasis.
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Affiliation(s)
- Lucie Orliaguet
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université Paris Descartes, Université Paris Diderot, Paris, France
| | - Elise Dalmas
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université Paris Descartes, Université Paris Diderot, Paris, France
| | - Karima Drareni
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université Paris Descartes, Université Paris Diderot, Paris, France
- Institute for Diabetes, Obesity and Metabolism, University of Pennsylvania, Philadelphia, PA, United States
| | - Nicolas Venteclef
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université Paris Descartes, Université Paris Diderot, Paris, France
| | - Fawaz Alzaid
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université Paris Descartes, Université Paris Diderot, Paris, France
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17
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Dierckx T, Bogie JFJ, Hendriks JJA. The Impact of Phytosterols on the Healthy and Diseased Brain. Curr Med Chem 2020; 26:6750-6765. [PMID: 29984647 DOI: 10.2174/0929867325666180706113844] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 02/28/2018] [Accepted: 03/07/2018] [Indexed: 02/07/2023]
Abstract
The central nervous system (CNS) is the most cholesterol-rich organ in mammals. Cholesterol homeostasis is essential for proper brain functioning and dysregulation of cholesterol metabolism can lead to neurological problems. Multiple sclerosis (MS) and Alzheimer's disease (AD) are examples of neurological diseases that are characterized by a disturbed cholesterol metabolism. Phytosterols (PS) are plant-derived components that structurally and functionally resemble cholesterol. PS are known for their cholesterol-lowering properties. Due to their ability to reach the brain, researchers have started to investigate the physiological role of PS in the CNS. In this review, the metabolism and function of PS in the diseased and healthy CNS are discussed.
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Affiliation(s)
- Tess Dierckx
- Biomedical Research Institute, Hasselt University, Diepenbeek, Hassett, Belgium
| | - Jeroen F J Bogie
- Biomedical Research Institute, Hasselt University, Diepenbeek, Hassett, Belgium
| | - Jerome J A Hendriks
- Biomedical Research Institute, Hasselt University, Diepenbeek, Hassett, Belgium
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18
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DeSUMOylase SENP7-Mediated Epithelial Signaling Triggers Intestinal Inflammation via Expansion of Gamma-Delta T Cells. Cell Rep 2019; 29:3522-3538.e7. [DOI: 10.1016/j.celrep.2019.11.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 09/20/2019] [Accepted: 11/06/2019] [Indexed: 12/31/2022] Open
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19
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Alvite G, Riera X, Cancela S, Paulino M, Esteves A. Bioinformatic analysis of a novel Echinococcus granulosus nuclear receptor with two DNA binding domains. PLoS One 2019; 14:e0224703. [PMID: 31710619 PMCID: PMC6844482 DOI: 10.1371/journal.pone.0224703] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 10/18/2019] [Indexed: 12/12/2022] Open
Abstract
Nuclear receptors are ligand-activated transcription factors capable of regulating the expression of complex gene networks. The family includes seven subfamilies of proteins with a wide phylogenetic distribution. A novel subfamily with two DNA-binding domains (2DBDs) has been reported in Schistosoma mansoni (Platyhelminth, Trematoda). This work describes the cDNA cloning and bioinformatics analysis of Eg2DBDα, a 2DBD nuclear receptor isoform from the parasite Echinococcus granulosus (Platyhelminth, Cestoda). The Eg2DBDα gene coding domain structure was analysed. Although two additional 2DBD nuclear receptors are reported in the parasite database GeneDB, they are unlikely to be expressed in the larval stage. Phylogenetic relationships between these atypical proteins from different cestodes are also analysed including S. mansoni 2DBD nuclear receptors. The presence of two DNA binding domains confers particular interest to these nuclear receptors, not only concerning their function but to the development of new antihelminthic drugs.
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Affiliation(s)
- Gabriela Alvite
- Biochemistry Section, Faculty of Sciences, Universidad de la República, Montevideo, Uruguay
| | - Ximena Riera
- Biochemistry Section, Faculty of Sciences, Universidad de la República, Montevideo, Uruguay
| | - Saira Cancela
- Biochemistry Section, Faculty of Sciences, Universidad de la República, Montevideo, Uruguay
| | - Margot Paulino
- Center of Bioinformatics, Departamento de Experimentación y Teoría de la Materia, Faculty of Chemistry, Universidad de la República, Montevideo, Uruguay
| | - Adriana Esteves
- Biochemistry Section, Faculty of Sciences, Universidad de la República, Montevideo, Uruguay
- * E-mail:
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20
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Rodriguez V, Bailey R, Larion M, Gilbert MR. Retinoid receptor turnover mediated by sumoylation, ubiquitination and the valosin-containing protein is disrupted in glioblastoma. Sci Rep 2019; 9:16250. [PMID: 31700049 PMCID: PMC6838077 DOI: 10.1038/s41598-019-52696-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 08/30/2019] [Indexed: 02/06/2023] Open
Abstract
Resistance to therapeutic use of retinoids in glioma has been observed for over 20 years; however, the exact mechanism of resistance remains unknown. To understand retinoic acid resistance in glioma, we studied the turnover mechanism of retinoid receptor proteins in neural stem cells and glioma stem-like cells. Here, we show that in normal neural stem cells, proteasomal degradation of retinoid receptors involves sumoylation, ubiquitination and recognition by the valosin-containing protein (VCP/p97/Cdc48). We find that Sumo1 modification has a dual role to stabilize the retinoid receptor from unwanted degradation and signal additional modification via ubiquitination. Subsequently, the modified receptor binds to the VCP chaperone and both proteins are degraded by the proteasome. Additionally, we reveal that all trans retinoic acid (ATRA) induces VCP expression, creating a positive feedback loop that enhances degradation. In contrast, the pathway is impaired in the glioma stem-like cells resulting in the accumulation of sumoylated and high molecular weight forms of retinoid receptors that lack transcriptional activity and fail to be recognized by the proteasome. Moreover, modified receptor accumulation occurs before ATRA treatment; therefore, the transcritptional defect in glioma is due to a block in the proteasomal degradation pathway that occurs after the sumo modification step.
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Affiliation(s)
- Virginia Rodriguez
- Neuro-oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA.
| | - Rolanda Bailey
- Neuro-oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Mioara Larion
- Neuro-oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Mark R Gilbert
- Neuro-oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
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21
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Sookoian S, Pirola CJ. Review article: shared disease mechanisms between non-alcoholic fatty liver disease and metabolic syndrome - translating knowledge from systems biology to the bedside. Aliment Pharmacol Ther 2019; 49:516-527. [PMID: 30714632 DOI: 10.1111/apt.15163] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 12/20/2018] [Accepted: 01/01/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND Non-alcoholic fatty liver disease (NAFLD) is the leading cause of chronic liver disease worldwide. Characterised by abnormal fat accumulation in the liver, NAFLD presents high degree of comorbidity with disorders of the metabolic syndrome, including type 2 diabetes, obesity and cardiovascular disease. These comorbidities have strong negative impact on the natural course of NAFLD and vice versa, whereby the presence of NAFLD substantially modifies the course and prognosis of metabolic syndrome-associated diseases. AIM To use systems biology strategies to interrogate disease mechanisms that are common to NAFLD and metabolic syndrome. METHODS We mapped shared gene/protein-disease interaction networks, we performed gene-disease enrichment analysis to assess pleiotropy, and we created a gene-drug connectivity network. RESULTS We found that a shared network of genes/proteins is overrepresented by immune response-related pathways, post-translational modifications of nuclear receptors, and platelet-related processes, including activation and platelet signalling. Likewise, gene-based disease-enrichment analysis suggested underlying molecular effectors that are shared with major systemic disorders, including diverse autoimmune diseases, kidney, respiratory and nervous system disorders, cancer and infectious diseases. The shared list of genes/proteins was enriched in drug targets for anti-inflammatory therapy, drugs used to treat cardiovascular diseases, antimicrobial agents and phytochemicals, among many other approved pharmaceutical compounds. By leveraging on publicly available OMICs data, we were able to show that shared loci are not necessarily affected by reverse causality. CONCLUSION We provide evidence indicating that NAFLD treatment, including severe histological traits, cannot be limited to the use of a single drug, as it rather requires a multi-target therapeutic approach.
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Affiliation(s)
- Silvia Sookoian
- School of Medicine, Institute of Medical Research A. Lanari, University of Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.,Department of Clinical and Molecular Hepatology, National Scientific and Technical Research Council (CONICET), Institute of Medical Research (IDIM), University of Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Carlos J Pirola
- School of Medicine, Institute of Medical Research A. Lanari, University of Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.,Department of Molecular Genetics and Biology of Complex Diseases, National Scientific and Technical Research Council (CONICET), Institute of Medical Research (IDIM), University of Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
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22
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Bilodeau S, Caron V, Gagnon J, Kuftedjian A, Tremblay A. A CK2-RNF4 interplay coordinates non-canonical SUMOylation and degradation of nuclear receptor FXR. J Mol Cell Biol 2018; 9:195-208. [PMID: 28201649 DOI: 10.1093/jmcb/mjx009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 02/14/2017] [Indexed: 01/20/2023] Open
Abstract
Farnesoid X receptor (FXR) is a ligand-activated nuclear receptor that plays a central role in regulating genes involved in bile acid homeostasis, and fat and glucose metabolism. Here, we demonstrate a post-translational interplay between FXR phosphorylation, SUMOylation, and ubiquitination that directs the receptor into an activation-degradation pathway in hepatocytes. We identify a non-canonical SUMOylation motif termed pSuM that conjugates SUMO2 at Lys-325 of FXR under the direct control of casein kinase 2 (CK2), which provides the required negative charge for Ubc9 and PIAS1 to perform SUMOylation, by phosphorylating Ser-327. Lys-325 SUMOylation is indispensable to the promotion of efficient ligand activation and transcriptional coactivation of FXR. Constitutive pSuM activation using a phospho-mimic Ser-327 mutant or catalytic CK2 expression strongly induces SUMO2 conjugation, which directs FXR ubiquitination and proteasome-dependent degradation. We also determine that such SUMOylation-dependent ubiquitination of FXR is mediated by the E3 ubiquitin ligase RNF4, which is required to achieve maximal induction of FXR and optimal up- or downregulation of responsive genes involved in bile acid homeostasis and liver regeneration. Our findings identify a highly regulated atypical SUMO conjugation motif that serves to coordinate FXR transcriptional competence, thereby expanding the intricate dynamics of the SUMOylation process used by incoming signals to govern metabolic gene regulation.
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Affiliation(s)
- Stéphanie Bilodeau
- Research Center, CHU Sainte-Justine, Montréal, Québec, H3T 1C5 Canada.,Department of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Montreal, Montréal, Québec, H3T 1J4 Canada
| | - Véronique Caron
- Research Center, CHU Sainte-Justine, Montréal, Québec, H3T 1C5 Canada
| | - Jonathan Gagnon
- Research Center, CHU Sainte-Justine, Montréal, Québec, H3T 1C5 Canada.,Department of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Montreal, Montréal, Québec, H3T 1J4 Canada
| | - Alexandre Kuftedjian
- Research Center, CHU Sainte-Justine, Montréal, Québec, H3T 1C5 Canada.,Department of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Montreal, Montréal, Québec, H3T 1J4 Canada
| | - André Tremblay
- Research Center, CHU Sainte-Justine, Montréal, Québec, H3T 1C5 Canada.,Department of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Montreal, Montréal, Québec, H3T 1J4 Canada.,Department of Obstetrics & Gynecology, Faculty of Medicine, University of Montreal, Montréal, Québec, H3T 1J4 Canada
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23
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Lao Y, Yang K, Wang Z, Sun X, Zou Q, Yu X, Cheng J, Tong X, Yeh ETH, Yang J, Yi J. DeSUMOylation of MKK7 kinase by the SUMO2/3 protease SENP3 potentiates lipopolysaccharide-induced inflammatory signaling in macrophages. J Biol Chem 2018; 293:3965-3980. [PMID: 29352108 PMCID: PMC5857993 DOI: 10.1074/jbc.m117.816769] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 01/12/2018] [Indexed: 01/06/2023] Open
Abstract
Protein SUMOylation has been reported to play a role in innate immune response, but the enzymes, substrates, and consequences of the specific inflammatory signaling events are largely unknown. Reactive oxygen species (ROS) are abundantly produced during macrophage activation and required for Toll-like receptor 4 (TLR4)-mediated inflammatory signaling. Previously, we demonstrated that SENP3 is a redox-sensitive SUMO2/3 protease. To explore any links between reversible SUMOylation and ROS-related inflammatory signaling in macrophage activation, we generated mice with Senp3 conditional knock-out in myeloid cells. In bacterial lipopolysaccharide (LPS)-induced in vitro and in vivo inflammation models, we found that SENP3 deficiency markedly compromises the activation of TLR4 inflammatory signaling and the production of proinflammatory cytokines in macrophages exposed to LPS. Moreover, Senp3 conditional knock-out mice were significantly less susceptible to septic shock. Of note, SENP3 deficiency was associated with impairment in JNK phosphorylation. We found that MKK7, which selectively phosphorylates JNK, is a SENP3 substrate and that SENP3-mediated deSUMOylation of MKK7 may favor its binding to JNK. Importantly, ROS-dependent SENP3 accumulation and MKK7 deSUMOylation rapidly occurred after LPS stimulation. In conclusion, our findings indicate that SENP3 potentiates LPS-induced TLR4 signaling via deSUMOylation of MKK7 leading to enhancement in JNK phosphorylation and the downstream events. Therefore this work provides novel mechanistic insights into redox regulation of innate immune responses.
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Affiliation(s)
- Yimin Lao
- From the Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Department of Biochemistry and Molecular Cell Biology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Kai Yang
- From the Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Department of Biochemistry and Molecular Cell Biology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Zhaojun Wang
- the Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Immunology, Shanghai 200025, China, and
| | - Xueqing Sun
- From the Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Department of Biochemistry and Molecular Cell Biology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Qiang Zou
- the Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Immunology, Shanghai 200025, China, and
| | - Xiaoyan Yu
- the Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Immunology, Shanghai 200025, China, and
| | - Jinke Cheng
- From the Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Department of Biochemistry and Molecular Cell Biology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Xuemei Tong
- From the Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Department of Biochemistry and Molecular Cell Biology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Edward T H Yeh
- the Department of Internal Medicine, University of Missouri, Columbia, Missouri 65211
| | - Jie Yang
- From the Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Department of Biochemistry and Molecular Cell Biology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China,
| | - Jing Yi
- From the Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Department of Biochemistry and Molecular Cell Biology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China,
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24
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Sumoylation of histone deacetylase 1 regulates MyoD signaling during myogenesis. Exp Mol Med 2018; 50:e427. [PMID: 29328071 PMCID: PMC5799798 DOI: 10.1038/emm.2017.236] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 07/18/2017] [Accepted: 07/19/2017] [Indexed: 02/07/2023] Open
Abstract
Sumoylation, the conjugation of a small ubiquitin-like modifier (SUMO) protein to a target, has diverse cellular effects. However, the functional roles of the SUMO modification during myogenesis have not been fully elucidated. Here, we report that basal sumoylation of histone deacetylase 1 (HDAC1) enhances the deacetylation of MyoD in undifferentiated myoblasts, whereas further sumoylation of HDAC1 contributes to switching its binding partners from MyoD to Rb to induce myocyte differentiation. Differentiation in C2C12 skeletal myoblasts induced new immunoblot bands above HDAC1 that were gradually enhanced during differentiation. Using SUMO inhibitors and sumoylation assays, we showed that the upper band was caused by sumoylation of HDAC1 during differentiation. Basal deacetylase activity was not altered in the SUMO modification-resistant mutant HDAC1 K444/476R (HDAC1 2R). Either differentiation or transfection of SUMO1 increased HDAC1 activity that was attenuated in HDAC1 2R. Furthermore, HDAC1 2R failed to deacetylate MyoD. Binding of HDAC1 to MyoD was attenuated by K444/476R. Binding of HDAC1 to MyoD was gradually reduced after 2 days of differentiation. Transfection of SUMO1 induced dissociation of HDAC1 from MyoD but potentiated its binding to Rb. SUMO1 transfection further attenuated HDAC1-induced inhibition of muscle creatine kinase luciferase activity that was reversed in HDAC1 2R. HDAC1 2R failed to inhibit myogenesis and muscle gene expression. In conclusion, HDAC1 sumoylation plays a dual role in MyoD signaling: enhancement of HDAC1 deacetylation of MyoD in the basally sumoylated state of undifferentiated myoblasts and dissociation of HDAC1 from MyoD during myogenesis.
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25
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Treuter E, Fan R, Huang Z, Jakobsson T, Venteclef N. Transcriptional repression in macrophages-basic mechanisms and alterations in metabolic inflammatory diseases. FEBS Lett 2017; 591:2959-2977. [DOI: 10.1002/1873-3468.12850] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 09/11/2017] [Accepted: 09/11/2017] [Indexed: 01/21/2023]
Affiliation(s)
- Eckardt Treuter
- Department of Biosciences and Nutrition; Center for Innovative Medicine (CIMED); Karolinska Institutet; Huddinge Sweden
| | - Rongrong Fan
- Department of Biosciences and Nutrition; Center for Innovative Medicine (CIMED); Karolinska Institutet; Huddinge Sweden
| | - Zhiqiang Huang
- Department of Biosciences and Nutrition; Center for Innovative Medicine (CIMED); Karolinska Institutet; Huddinge Sweden
| | - Tomas Jakobsson
- Department of Laboratory Medicine; Karolinska Institutet; Huddinge Sweden
| | - Nicolas Venteclef
- UMR_S 1138 Cordeliers Research; Institut National de la Santé et de la Recherche Médicale (INSERM); Sorbonne Universités; Université Pierre et Marie-Curie; Paris France
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26
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Abstract
Protein modification with the small ubiquitin-related modifier (SUMO) can affect protein function, enzyme activity, protein-protein interactions, protein stability, protein targeting and cellular localization. SUMO influences the function and regulation of metabolic enzymes within pathways, and in some cases targets entire metabolic pathways by affecting the activity of transcription factors or by facilitating the translocation of entire metabolic pathways to subcellular compartments. SUMO modification is also a key component of nutrient- and metabolic-sensing mechanisms that regulate cellular metabolism. In addition to its established roles in maintaining metabolic homeostasis, there is increasing evidence that SUMO is a key factor in facilitating cellular stress responses through the regulation and/or adaptation of the most fundamental metabolic processes, including energy and nucleotide metabolism. This review focuses on the role of SUMO in cellular metabolism and metabolic disease.
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27
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He L, Zhou X, Huang N, Li H, Li T, Yao K, Tian Y, Hu CAA, Yin Y. Functions of pregnane X receptor in self-detoxification. Amino Acids 2017; 49:1999-2007. [PMID: 28534176 DOI: 10.1007/s00726-017-2435-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 05/03/2017] [Indexed: 12/19/2022]
Abstract
Pregnane X receptor (PXR, NR1I2), a member of the nuclear receptor superfamily, is a crucial regulator of nutrient metabolism and metabolic detoxification such as metabolic syndrome, xenobiotic metabolism, inflammatory responses, glucose, cholesterol and lipid metabolism, and endocrine homeostasis. Notably, much experimental and clinical evidence show that PXR senses xenobiotics and triggers the detoxification response to prevent diseases such as diabetes, obesity, intestinal inflammatory diseases and liver fibrosis. In this review we summarize recent advances on remarkable metabolic and regulatory versatility of PXR, and we emphasizes its role and potential implication as an effective modulator of self-detoxification in animals and humans.
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Affiliation(s)
- Liuqin He
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center of Healthy Livestock and Poultry, Changsha, 410125, Hunan, China.,University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Xihong Zhou
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center of Healthy Livestock and Poultry, Changsha, 410125, Hunan, China
| | - Niu Huang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128, Hunan, China
| | - Huan Li
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128, Hunan, China
| | - Tiejun Li
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center of Healthy Livestock and Poultry, Changsha, 410125, Hunan, China.,Hunan Co-Innovation Center of Animal Production Safety, Changsha, 410128, Hunan, China
| | - Kang Yao
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center of Healthy Livestock and Poultry, Changsha, 410125, Hunan, China. .,College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128, Hunan, China. .,Hunan Co-Innovation Center of Animal Production Safety, Changsha, 410128, Hunan, China.
| | - Yanan Tian
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128, Hunan, China.,Department of Veterinary Physiology and Pharmacology, Texas A & M University, College Station, TX, 77843, USA
| | - Chien-An Andy Hu
- Department of Biochemistry and Molecular Biology, University of New Mexico, Health Sciences Center, MSC08 4670, Albuquerque, USA
| | - Yulong Yin
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Hunan Provincial Engineering Research Center of Healthy Livestock and Poultry, Changsha, 410125, Hunan, China. .,Hunan Co-Innovation Center of Animal Production Safety, Changsha, 410128, Hunan, China.
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28
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Weikum ER, Knuesel MT, Ortlund EA, Yamamoto KR. Glucocorticoid receptor control of transcription: precision and plasticity via allostery. Nat Rev Mol Cell Biol 2017; 18:159-174. [PMID: 28053348 PMCID: PMC6257982 DOI: 10.1038/nrm.2016.152] [Citation(s) in RCA: 338] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The glucocorticoid receptor (GR) is a constitutively expressed transcriptional regulatory factor (TRF) that controls many distinct gene networks, each uniquely determined by particular cellular and physiological contexts. The precision of GR-mediated responses seems to depend on combinatorial, context-specific assembly of GR-nucleated transcription regulatory complexes at genomic response elements. In turn, evidence suggests that context-driven plasticity is conferred by the integration of multiple signals, each serving as an allosteric effector of GR conformation, a key determinant of regulatory complex composition and activity. This structural and mechanistic perspective on GR regulatory specificity is likely to extend to other eukaryotic TRFs.
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Affiliation(s)
- Emily R Weikum
- Department of Biochemistry, Emory University School of Medicine, 1510 Clifton Road, Atlanta, Georgia 30322, USA
| | - Matthew T Knuesel
- Department of Cellular and Molecular Pharmacology, University of California San Francisco School of Medicine, 600 16th Street, San Francisco, California 94143, USA
| | - Eric A Ortlund
- Department of Biochemistry, Emory University School of Medicine, 1510 Clifton Road, Atlanta, Georgia 30322, USA
| | - Keith R Yamamoto
- Department of Cellular and Molecular Pharmacology, University of California San Francisco School of Medicine, 600 16th Street, San Francisco, California 94143, USA
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29
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Becares N, Gage MC, Pineda-Torra I. Posttranslational Modifications of Lipid-Activated Nuclear Receptors: Focus on Metabolism. Endocrinology 2017; 158:213-225. [PMID: 27925773 PMCID: PMC5413085 DOI: 10.1210/en.2016-1577] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 12/02/2016] [Indexed: 12/18/2022]
Abstract
Posttranslational modifications (PTMs) occur to nearly all proteins, are catalyzed by specific enzymes, and are subjected to tight regulation. They have been shown to be a powerful means by which the function of proteins can be modified, resulting in diverse effects. Technological advances such as the increased sensitivity of mass spectrometry-based techniques and availability of mutant animal models have enhanced our understanding of the complexities of their regulation and the effect they have on protein function. However, the role that PTMs have in a pathological context still remains unknown for the most part. PTMs enable the modulation of nuclear receptor function in a rapid and reversible manner in response to varied stimuli, thereby dramatically altering their activity in some cases. This review focuses on acetylation, phosphorylation, SUMOylation, and O-GlcNAcylation, which are the 4 most studied PTMs affecting lipid-regulated nuclear receptor biology, as well as on the implications of such modifications on metabolic pathways under homeostatic and pathological situations. Moreover, we review recent studies on the modulation of PTMs as therapeutic targets for metabolic diseases.
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Affiliation(s)
- Natalia Becares
- Centre for Clinical Pharmacology, Division of Medicine, University College of London, London, United Kingdom
| | - Matthew C Gage
- Centre for Clinical Pharmacology, Division of Medicine, University College of London, London, United Kingdom
| | - Inés Pineda-Torra
- Centre for Clinical Pharmacology, Division of Medicine, University College of London, London, United Kingdom
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30
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31
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Chang XJ, Zheng CQ, Wang YW, Meng C, Xie XL, Liu HP. Differential protein expression using proteomics from a crustacean brine shrimp (Artemia sinica) under CO 2-driven seawater acidification. FISH & SHELLFISH IMMUNOLOGY 2016; 58:669-677. [PMID: 27725259 DOI: 10.1016/j.fsi.2016.10.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 09/30/2016] [Accepted: 10/06/2016] [Indexed: 06/06/2023]
Abstract
Gradually increasing atmospheric CO2 partial pressure (pCO2) has caused an imbalance in carbonate chemistry and resulted in decreased seawater pH in marine ecosystems, termed seawater acidification. Anthropogenic seawater acidification is postulated to affect the physiology of many marine calcifying organisms. To understand the possible effects of seawater acidification on the proteomic responses of a marine crustacean brine shrimp (Artemia sinica) three groups of cysts were hatched and further raised in seawater at different pH levels (8.2 as control and 7.8 and 7.6 as acidification stress levels according to the predicted levels at the end of this century and next century, respectively) for 1, 7 and 14 days followed by examination of the protein expression changes via two-dimensional gel electrophoresis. Searches of protein databases revealed that 67 differential protein spots were altered due to lower pH level (7.6 and 7.8) stress in comparison to control groups (pH 8.2) by mass spectrometry. Generally, these differentially expressed proteins included the following: 1) metabolic process-related proteins involved in glycolysis and glucogenesis, nucleotide/amino acid/fatty acid metabolism, protein biosynthesis, DNA replication and apoptosis; 2) stress response-related proteins, such as peroxiredoxin, thioredoxin peroxidase, 70-kDa heat shock protein, Na/K ATPase, and ubiquinol-cytochrome c reductase; 3) immune defence-related proteins, such as prophenoloxidase and ferritin; 4) cytoskeletal-related proteins, such as myosin light chain, TCP1 subunit 2, tropomyosin and tubulin alpha chain; and 5) signal transduction-related proteins, such as phospholipase C-like protein, 14-3-3 zeta, translationally controlled tumour protein and RNA binding motif protein. Taken together, these data support the idea that CO2-driven seawater acidification may affect protein expression in the crustacean A. sinica and possibly also in other species that feed on brine shrimp in the ecosystem, particularly marine food webs.
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Affiliation(s)
- Xue-Jiao Chang
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Chao-Qun Zheng
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Yu-Wei Wang
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Chuang Meng
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Xiao-Lu Xie
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, Fujian, PR China
| | - Hai-Peng Liu
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, Fujian, PR China; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Xiamen 361102, Fujian, PR China.
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32
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Speen AM, Kim HYH, Bauer RN, Meyer M, Gowdy KM, Fessler MB, Duncan KE, Liu W, Porter NA, Jaspers I. Ozone-derived Oxysterols Affect Liver X Receptor (LXR) Signaling: A POTENTIAL ROLE FOR LIPID-PROTEIN ADDUCTS. J Biol Chem 2016; 291:25192-25206. [PMID: 27703007 DOI: 10.1074/jbc.m116.732362] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 09/14/2016] [Indexed: 12/25/2022] Open
Abstract
When inhaled, ozone (O3) interacts with cholesterols of airway epithelial cell membranes or the lung-lining fluid, generating chemically reactive oxysterols. The mechanism by which O3-derived oxysterols affect molecular function is unknown. Our data show that in vitro exposure of human bronchial epithelial cells to O3 results in the formation of oxysterols, epoxycholesterol-α and -β and secosterol A and B (Seco A and Seco B), in cell lysates and apical washes. Similarly, bronchoalveolar lavage fluid obtained from human volunteers exposed to O3 contained elevated levels of these oxysterol species. As expected, O3-derived oxysterols have a pro-inflammatory effect and increase NF-κB activity. Interestingly, expression of the cholesterol efflux pump ATP-binding cassette transporter 1 (ABCA1), which is regulated by activation of the liver X receptor (LXR), was suppressed in epithelial cells exposed to O3 Additionally, exposure of LXR knock-out mice to O3 enhanced pro-inflammatory cytokine production in the lung, suggesting LXR inhibits O3-induced inflammation. Using alkynyl surrogates of O3-derived oxysterols, our data demonstrate adduction of LXR with Seco A. Similarly, supplementation of epithelial cells with alkynyl-tagged cholesterol followed by O3 exposure causes observable lipid-LXR adduct formation. Experiments using Seco A and the LXR agonist T0901317 (T09) showed reduced expression of ABCA1 as compared with stimulation with T0901317 alone, indicating that Seco A-LXR protein adduct formation inhibits LXR activation by traditional agonists. Overall, these data demonstrate that O3-derived oxysterols have pro-inflammatory functions and form lipid-protein adducts with LXR, thus leading to suppressed cholesterol regulatory gene expression and providing a biochemical mechanism mediating O3-derived formation of oxidized lipids in the airways and subsequent adverse health effects.
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Affiliation(s)
- Adam M Speen
- From the Curriculum in Toxicology, Departments of Pediatrics and Microbiology and Immunology, Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Hye-Young H Kim
- the Department of Chemistry and Center for Molecular Toxicology, Vanderbilt University, Nashville, Tennessee 37235
| | - Rebecca N Bauer
- From the Curriculum in Toxicology, Departments of Pediatrics and Microbiology and Immunology, Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Megan Meyer
- From the Curriculum in Toxicology, Departments of Pediatrics and Microbiology and Immunology, Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Kymberly M Gowdy
- the Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, North Carolina 27834, and
| | - Michael B Fessler
- the Immunity, Inflammation, and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Kelly E Duncan
- From the Curriculum in Toxicology, Departments of Pediatrics and Microbiology and Immunology, Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Wei Liu
- the Department of Chemistry and Center for Molecular Toxicology, Vanderbilt University, Nashville, Tennessee 37235
| | - Ned A Porter
- the Department of Chemistry and Center for Molecular Toxicology, Vanderbilt University, Nashville, Tennessee 37235
| | - Ilona Jaspers
- From the Curriculum in Toxicology, Departments of Pediatrics and Microbiology and Immunology, Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina, Chapel Hill, North Carolina 27599,
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Weitzel JM. Impaired Repressor Function in SUMOylation-Defective Thyroid Hormone Receptor Isoforms. Eur Thyroid J 2016; 5:152-163. [PMID: 27843805 PMCID: PMC5091228 DOI: 10.1159/000447232] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 05/27/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Many nuclear receptors are modified by posttranslational modifications. OBJECTIVES The transcriptional activity of thyroid hormone receptors (TRs) is modified by the influence of its ligand (thyroid hormones T3 and T4), but is also affected by posttranslational modifications. This study focuses on the SUMOylation of TR isoforms and the consequences on transcriptional activity and promoter occupancy. METHODS SUMOylation of TR wild-type as well as isoform-specific point mutations have been studied in vitro. The promoter occupancy of TR (wild-type and double- or triple-mutated versions) and transcriptional cofactors have been investigated in chromatin immunoprecipitation (ChIP) and Re-ChIP analysis. RESULTS TR is modified by SUMO proteins at defined residues: the isoform TRα is mainly modified at lysines 281 and 387, whereas lysines 50 and 443 are major SUMOylation sites of isoform TRβ. Lysine residues K281 (TRα) and K50 (TRβ) are isoform-specific SUMOylation sites influencing differing TR domains, whereas K387 (TRα) and K443 (TRβ) are orthologous residues. TRs are targets of all three SUMO variants (SUMO-1, -2, and -3). The transcriptional activity of SUMOylation-defective mutants of TR alters gene transcription from positively and negatively regulated T3 target genes. CONCLUSIONS The most pronounced effect is an impaired repressor function of SUMOylation-deficient TR in the absence of T3. The transcriptional properties of SUMOylation-defective TRs can be at least in part ascribed to altered interaction with transcriptional cofactors such as SRC-1 and NCoR. Thus, these data indicate that posttranslational modification of TR by SUMOylation contribute to the fine tuning of its transcriptional response maintaining effects on cellular and physiological homeostasis.
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Affiliation(s)
- Joachim M. Weitzel
- *Joachim M. Weitzel, Institute of Reproductive Biology, Leibniz Institute for Farm, Animal Biology (FBN), FBN Dummerstorf, Wilhelm-Stahl-Allee 2, DE-18196 Dummerstorf (Germany), E-Mail
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Intense Resistance Exercise Promotes the Acute and Transient Nuclear Translocation of Small Ubiquitin-Related Modifier (SUMO)-1 in Human Myofibres. Int J Mol Sci 2016; 17:ijms17050646. [PMID: 27136539 PMCID: PMC4881472 DOI: 10.3390/ijms17050646] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 04/15/2016] [Accepted: 04/21/2016] [Indexed: 01/14/2023] Open
Abstract
Protein sumoylation is a posttranslational modification triggered by cellular stress. Because general information concerning the role of small ubiquitin-related modifier (SUMO) proteins in adult skeletal muscle is sparse, we investigated whether SUMO-1 proteins will be subjected to time-dependent changes in their subcellular localization in sarcoplasmic and nuclear compartments of human type I and II skeletal muscle fibers in response to acute stimulation by resistance exercise (RE). Skeletal muscle biopsies were taken at baseline (PRE), 15, 30, 60, 240 min and 24 h post RE from 6 male subjects subjected to a single bout of one-legged knee extensions. SUMO-1 localization was determined via immunohistochemistry and confocal laser microscopy. At baseline SUMO-1 was localized in perinuclear regions of myonuclei. Within 15 and up to 60 min post exercise, nuclear SUMO-1 localization was significantly increased (p < 0.01), declining towards baseline levels within 240 min post exercise. Sarcoplasmic SUMO-1 localization was increased at 15 min post exercise in type I and up to 30 min post RE in type II myofibres. The changing localization of SUMO-1 proteins acutely after intense muscle contractions points to a role for SUMO proteins in the acute regulation of the skeletal muscle proteome after exercise.
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Acetylation of lysine 109 modulates pregnane X receptor DNA binding and transcriptional activity. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2016; 1859:1155-1169. [PMID: 26855179 DOI: 10.1016/j.bbagrm.2016.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 01/19/2016] [Accepted: 01/26/2016] [Indexed: 12/31/2022]
Abstract
Pregnane X receptor (PXR) is a major transcriptional regulator of xenobiotic metabolism and transport pathways in the liver and intestines, which are critical for protecting organisms against potentially harmful xenobiotic and endobiotic compounds. Inadvertent activation of drug metabolism pathways through PXR is known to contribute to drug resistance, adverse drug-drug interactions, and drug toxicity in humans. In both humans and rodents, PXR has been implicated in non-alcoholic fatty liver disease, diabetes, obesity, inflammatory bowel disease, and cancer. Because of PXR's important functions, it has been a therapeutic target of interest for a long time. More recent mechanistic studies have shown that PXR is modulated by multiple PTMs. Herein we provide the first investigation of the role of acetylation in modulating PXR activity. Through LC-MS/MS analysis, we identified lysine 109 (K109) in the hinge as PXR's major acetylation site. Using various biochemical and cell-based assays, we show that PXR's acetylation status and transcriptional activity are modulated by E1A binding protein (p300) and sirtuin 1 (SIRT1). Based on analysis of acetylation site mutants, we found that acetylation at K109 represses PXR transcriptional activity. The mechanism involves loss of RXRα dimerization and reduced binding to cognate DNA response elements. This mechanism may represent a promising therapeutic target using modulators of PXR acetylation levels. This article is part of a Special Issue entitled: Xenobiotic nuclear receptors: New Tricks for An Old Dog, edited by Dr. Wen Xie.
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Tan H, Xu C, Zeng H, Wang Y, Li Y, Fan X, Chen P, Jiang Y, Chen X, Huang M, Bi H. SUMOylation of pregnane X receptor suppresses rifampicin-induced CYP3A4 and P-gp expression and activity in LS174T cells. J Pharmacol Sci 2016; 130:66-71. [DOI: 10.1016/j.jphs.2015.11.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 10/29/2015] [Accepted: 11/15/2015] [Indexed: 01/17/2023] Open
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TCDD-inducible poly-ADP-ribose polymerase (TIPARP/PARP7) mono-ADP-ribosylates and co-activates liver X receptors. Biochem J 2016; 473:899-910. [PMID: 26814197 DOI: 10.1042/bj20151077] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 01/26/2016] [Indexed: 12/27/2022]
Abstract
Members of the poly-ADP-ribose polymerase (PARP) family catalyse the ADP-ribosylation of target proteins and are known to play important roles in many cellular processes, including DNA repair, differentiation and transcription. The majority of PARPs exhibit mono-ADP-ribosyltransferase activity rather than PARP activity; however, little is known about their biological activity. In the present study, we report that 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-inducible poly-ADP-ribose polymerase (TIPARP), mono-ADP-ribosylates and positively regulates liver X receptor α (LXRα) and LXRβ activity. Overexpression of TIPARP enhanced LXR-reporter gene activity. TIPARP knockdown or deletion reduced LXR regulated target gene expression levels in HepG2 cells and in Tiparp(-/-)mouse embryonic fibroblasts (MEFs) respectively. Deletion and mutagenesis studies showed that TIPARP's zinc-finger and catalytic domains were required to enhance LXR activity. Protein interaction studies using TIPARP and LXRα/β peptide arrays revealed that LXRs interacted with an N-terminal sequence (a.a. 209-236) of TIPARP, which also overlapped with a putative co-activator domain of TIPARP (a.a. 200-225). Immunofluorescence studies showed that TIPARP and LXRα or LXRβ co-localized in the nucleus.In vitroribosylation assays provided evidence that TIPARP mono-ADP-ribosylated both LXRα and LXRβ. Co-immunoprecipitation (co-IP) studies revealed that ADP-ribosylase macrodomain 1 (MACROD1), but not MACROD2, interacted with LXRs in a TIPARP-dependent manner. This was complemented by reporter gene studies showing that MACROD1, but not MACROD2, prevented the TIPARP-dependent increase in LXR activity. GW3965-dependent increases in hepatic Srebp1 mRNA and protein expression levels were reduced in Tiparp(-/-)mice compared with Tiparp(+/+)mice. Taken together, these data identify a new mechanism of LXR regulation that involves TIPARP, ADP-ribosylation and MACROD1.
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Lee J, Yang DJ, Lee S, Hammer GD, Kim KW, Elmquist JK. Nutritional conditions regulate transcriptional activity of SF-1 by controlling sumoylation and ubiquitination. Sci Rep 2016; 6:19143. [PMID: 26750456 PMCID: PMC4707483 DOI: 10.1038/srep19143] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 11/20/2015] [Indexed: 12/23/2022] Open
Abstract
Steroidogenic factor 1 (SF-1) is a transcription factor expressed in the ventral medial nucleus of the hypothalamus that regulates energy homeostasis. However, the molecular mechanisms of SF-1 in the control of energy balance are largely unknown. Here, we show that nutritional conditions, such as the presence or absence of serum, affect SF-1 action. Serum starvation significantly decreased hypothalamic SF-1 levels by promoting ubiquitin-dependent degradation, and sumoylation was required for this process. SF-1 transcriptional activity was also differentially regulated by nutritional status. Under normal conditions, the transcriptional activity of hypothalamic SF-1 was activated by SUMO, but this was attenuated during starvation. Taken together, these results indicate that sumoylation and ubiquitination play crucial roles in the regulation of SF-1 function and that these effects are dependent on nutritional conditions, further supporting the importance of SF-1 in the control of energy homeostasis.
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Affiliation(s)
- Jiwon Lee
- Departments of Pharmacology and Internal Medicine, Division of Hypothalamic Research, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Dong Joo Yang
- Departments of Pharmacology and Global Medical Science, Institute of Lifestyle Medicine and Nuclear Receptor Research Consortium, Wonju College of Medicine, Yonsei University, Wonju, 26426, South Korea
| | - Syann Lee
- Departments of Pharmacology and Internal Medicine, Division of Hypothalamic Research, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Gary D Hammer
- Endocrine Oncology Program, Center for Organogenesis, University of Michigan Health System, Ann Arbor, Michigan 48109, USA
| | - Ki Woo Kim
- Departments of Pharmacology and Global Medical Science, Institute of Lifestyle Medicine and Nuclear Receptor Research Consortium, Wonju College of Medicine, Yonsei University, Wonju, 26426, South Korea
| | - Joel K Elmquist
- Departments of Pharmacology and Internal Medicine, Division of Hypothalamic Research, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
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Lempradl A, Pospisilik JA, Penninger JM. Exploring the emerging complexity in transcriptional regulation of energy homeostasis. Nat Rev Genet 2015; 16:665-81. [PMID: 26460345 DOI: 10.1038/nrg3941] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Obesity and its associated diseases are expected to affect more than 1 billion people by the year 2030. These figures have sparked intensive research into the molecular control of food intake, nutrient distribution, storage and metabolism--processes that are collectively termed energy homeostasis. Recent decades have also seen dramatic developments in our understanding of gene regulation at the signalling, chromatin and post-transcriptional levels. The seemingly exponential growth in this complexity now poses a major challenge for translational researchers in need of simplified but accurate paradigms for clinical use. In this Review, we consider the current understanding of transcriptional control of energy homeostasis, including both transcriptional and epigenetic regulators, and crosstalk between pathways. We also provide insights into emerging developments and challenges in this field.
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Affiliation(s)
- Adelheid Lempradl
- Max Planck Institute of Immunobiology and Epigenetics, Stuebeweg 51, 79108 Freiburg, Germany
| | - J Andrew Pospisilik
- Max Planck Institute of Immunobiology and Epigenetics, Stuebeweg 51, 79108 Freiburg, Germany
| | - Josef M Penninger
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Dr Bohr-Gasse 3, 1030 Vienna, Austria
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Small ubiquitin-related modifier 2/3 interacts with p65 and stabilizes it in the cytoplasm in HBV-associated hepatocellular carcinoma. BMC Cancer 2015; 15:675. [PMID: 26458400 PMCID: PMC4603762 DOI: 10.1186/s12885-015-1665-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 09/30/2015] [Indexed: 11/17/2022] Open
Abstract
Background SUMOylation, an important post-translational modification, associates with the development of hepatocellular carcinoma (HCC). p65, one of the most important subunits of NF-κB, is a key regulator in the development of HCC and has been reported to be SUMOylated by exogenous small ubiquitin-related modifier 3 (SUMO3) in HEK 293T cells. However, the relationship between p65 and SUMO2/3 in HCC remains unknown. This study was to investigate the interaction between p65 and SUMO2/3 and explore the potential roles involved in HCC. Methods The expressions of p65 and SUMO2/3 in the liver tissues were detected by using immunohistochemistry. We performed double-labeled immunofluorescence and co-immunoprecipitation assay to verify the interaction between p65 and SUMO2/3. The extraction of nuclear and cytoplasmic proteins was performed, and the subcellular localization of p65 was detected. The proliferation and migration of hepatoma cells were observed using MTT, colony formation, and transwell assays. Results We found a strong SUMO2/3-positive immunoreactivity in the cytoplasm in the non-tumor tissues of HCC. However, SUMO2/3 level was down regulated in the tumor tissues as compared with the adjacent non-tumor tissues. In accordance with this finding, p65 was up regulated in the adjacent non-tumor tissues and almost localized in the cytoplasm. There was a close correlation between SUMO2/3 and p65 expressions in the liver tissues (R = 0.800, p = 0.006). The interaction between p65 and SUMO2/3 was verified by co-immunoprecipitation and double-labeled immunofluorescent assays. TNF-α (10 ng/ml) treatment for 30 min not only up regulated the cytoplasmic conjugated SUMO2/3, but also enhanced SUMO2/3-p65 interaction. Furthermore, we found that SUMO2/3 up regulated the cytoplasmic p65 protein level in a dose-dependent manner, but not affected its mRNA level. The increase of p65 protein by SUMO2/3 was abolished by MG132 treatment, a reversible inhibitor of proteasome. Meanwhile, TNF-α-induced increase of SUMO2/3-conjugated p65 was along with the reduction of the ubiquitin-conjugated p65. The further study showed that SUMO2/3 over-expression decreased the proliferative ability of hepatoma cells, but did not affect the migration. Conclusion SUMO2/3-p65 interaction may be a novel mechanism involved in the transformation from chronic hepatitis B to HCC via stabilizing cytoplasmic p65, which might shed light on understanding the tumorigenesis and development. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1665-3) contains supplementary material, which is available to authorized users.
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Lin CY, Vedin LL, Steffensen KR. The emerging roles of liver X receptors and their ligands in cancer. Expert Opin Ther Targets 2015; 20:61-71. [PMID: 26788589 DOI: 10.1517/14728222.2015.1081169] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Liver X receptors (LXRs) are nuclear receptors with well-known functions in cholesterol transport, fatty acid and glucose metabolism, and modulation of immune responses. Natural and synthetic ligands have been identified and are under development for the treatment of metabolic and inflammatory conditions and diseases. There is mounting evidence pointing to functional roles for LXRs in a variety of malignancies and the potential therapeutic efficacy of their ligands. AREAS COVERED This review summarizes the discovery and characterization of LXRs and their ligands, surveys their effects and mechanisms of action in cell-based and animal models of cancer, and proposes the future direction of basic and translational studies of LXRs and their ligands in cancer research and therapeutics. EXPERT OPINION Targeting LXRs is a promising strategy for cancer treatment, particularly for those cancers which do not have effective treatment options. Key questions remain, however, regarding the specific mechanisms of action, effects on other target cells within the tumor microenvironment, and receptor status in patient populations. Moreover, LXR ligands optimized for disease-specific functions and cancer-related endpoints are currently not available. These issues represent both challenges and significant opportunities for future research and development efforts.
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Affiliation(s)
- Chin-Yo Lin
- a 1 University of Houston, Center for Nuclear Receptors and Cell Signaling, Department of Biology and Biochemistry , Houston, TX, USA
| | - Lise-Lotte Vedin
- b 2 Karolinska University Hospital Huddinge, Karolinska Institutet, Division of Clinical Chemistry, Department of Laboratory Medicine , SE-141 86 Stockholm, Sweden
| | - Knut R Steffensen
- b 2 Karolinska University Hospital Huddinge, Karolinska Institutet, Division of Clinical Chemistry, Department of Laboratory Medicine , SE-141 86 Stockholm, Sweden
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Cui W, Sun M, Galeva N, Williams TD, Azuma Y, Staudinger JL. SUMOylation and Ubiquitylation Circuitry Controls Pregnane X Receptor Biology in Hepatocytes. Drug Metab Dispos 2015; 43:1316-25. [PMID: 26063058 DOI: 10.1124/dmd.115.065201] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 06/10/2015] [Indexed: 12/25/2022] Open
Abstract
Several nuclear receptor (NR) superfamily members are known to be the molecular target of either the small ubiquitin-related modifier (SUMO) or ubiquitin-signaling pathways. However, little is currently known regarding how these two post-translational modifications interact to control NR biology. We show that SUMO and ubiquitin circuitry coordinately modifies the pregnane X receptor (PXR, NR1I2) to play a key role in regulating PXR protein stability, transactivation capacity, and transcriptional repression. The SUMOylation and ubiquitylation of PXR is increased in a ligand- and tumor necrosis factor alpha -: dependent manner in hepatocytes. The SUMO-E3 ligase enzymes protein inhibitor of activated signal transducer and activator of transcription-1 (STAT1) STAT-1 (PIAS1) and protein inhibitor of activated STAT Y (PIASy) drive high levels of PXR SUMOylation. Expression of protein inhibitor of activated stat 1 selectively increases SUMO(3)ylation as well as PXR-mediated induction of cytochrome P450, family 3, subfamily A and the xenobiotic response. The PIASy-mediated SUMO(1)ylation imparts a transcriptionally repressive function by ameliorating interaction of PXR with coactivator protein peroxisome proliferator-activated receptor gamma coactivator-1-alpha. The SUMO modification of PXR is effectively antagonized by the SUMO protease sentrin protease (SENP) 2, whereas SENP3 and SENP6 proteases are highly active in the removal of SUMO2/3 chains. The PIASy-mediated SUMO(1)ylation of PXR inhibits ubiquitin-mediated degradation of this important liver-enriched NR by the 26S proteasome. Our data reveal a working model that delineates the interactive role that these two post-translational modifications play in reconciling PXR-mediated gene activation of the xenobiotic response versus transcriptional repression of the proinflammatory response in hepatocytes. Taken together, our data reveal that the SUMOylation and ubiquitylation of the PXR interface in a fundamental manner directs its biologic function in the liver in response to xenobiotic or inflammatory stress.
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Affiliation(s)
- Wenqi Cui
- Departments of Pharmacology and Toxicology (W.C., J.L.S.), Mass Spectrometry Laboratory (N.G., T.D.W.), and Molecular Biosciences, University of Kansas, Lawrence, Kansas (Y.A.); and Department of Medicine, University of California, San Diego, La Jolla, California (M.S.)
| | - Mengxi Sun
- Departments of Pharmacology and Toxicology (W.C., J.L.S.), Mass Spectrometry Laboratory (N.G., T.D.W.), and Molecular Biosciences, University of Kansas, Lawrence, Kansas (Y.A.); and Department of Medicine, University of California, San Diego, La Jolla, California (M.S.)
| | - Nadezhda Galeva
- Departments of Pharmacology and Toxicology (W.C., J.L.S.), Mass Spectrometry Laboratory (N.G., T.D.W.), and Molecular Biosciences, University of Kansas, Lawrence, Kansas (Y.A.); and Department of Medicine, University of California, San Diego, La Jolla, California (M.S.)
| | - Todd D Williams
- Departments of Pharmacology and Toxicology (W.C., J.L.S.), Mass Spectrometry Laboratory (N.G., T.D.W.), and Molecular Biosciences, University of Kansas, Lawrence, Kansas (Y.A.); and Department of Medicine, University of California, San Diego, La Jolla, California (M.S.)
| | - Yoshiaki Azuma
- Departments of Pharmacology and Toxicology (W.C., J.L.S.), Mass Spectrometry Laboratory (N.G., T.D.W.), and Molecular Biosciences, University of Kansas, Lawrence, Kansas (Y.A.); and Department of Medicine, University of California, San Diego, La Jolla, California (M.S.)
| | - Jeff L Staudinger
- Departments of Pharmacology and Toxicology (W.C., J.L.S.), Mass Spectrometry Laboratory (N.G., T.D.W.), and Molecular Biosciences, University of Kansas, Lawrence, Kansas (Y.A.); and Department of Medicine, University of California, San Diego, La Jolla, California (M.S.)
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Stein S, Schoonjans K. Molecular basis for the regulation of the nuclear receptor LRH-1. Curr Opin Cell Biol 2015; 33:26-34. [DOI: 10.1016/j.ceb.2014.10.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 10/24/2014] [Indexed: 10/24/2022]
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Sun M, Cui W, Woody SK, Staudinger JL. Pregnane X receptor modulates the inflammatory response in primary cultures of hepatocytes. Drug Metab Dispos 2014; 43:335-43. [PMID: 25527709 DOI: 10.1124/dmd.114.062307] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Bacterial sepsis is characterized by a rapid increase in the expression of inflammatory mediators to initiate the acute phase response in liver. Inflammatory mediator release is counterbalanced by the coordinated expression of anti-inflammatory molecules such as interleukin 1 receptor antagonist (IL1-Ra) through time. This study determined whether activation of pregnane X receptor (PXR, NR1I2) alters the lipopolysaccharide (LPS)-inducible gene expression program in primary cultures of hepatocytes (PCHs). Preactivation of PXR for 24 hours in PCHs isolated from wild-type mice suppressed the subsequent LPS-inducible expression of the key inflammatory mediators interleukin 1β (IL-1β), interleukin 6 (IL-6), and tumor necrosis factor α (TNFα) but not in PCHs isolated from Pxr-null (PXR-knockout [KO]) mice. Basal expression of key inflammatory cytokines was elevated in PCHs from PXR-KO mice. Stimulation of PCHs from PXR-KO mice with LPS alone produced enhanced levels of IL-1β when compared with wild-type mice. Experiments performed using PCHs from both humanized-PXR transgenic mice as well as human donors indicate that prolonged activation of PXR produces an increased secretion of IL1-Ra from cells through time. Our data reveal a working model that describes a pivotal role for PXR in both inhibiting as well as in resolving the inflammatory response in hepatocytes. Understanding the molecular details of how PXR is converted from a positive regulator of drug-metabolizing enzymes into a transcriptional suppressor of inflammation in liver will provide new pharmacologic strategies for modulating inflammatory-related diseases in the liver and intestine.
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Affiliation(s)
- Mengxi Sun
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, Kansas
| | - Wenqi Cui
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, Kansas
| | - Sarah K Woody
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, Kansas
| | - Jeff L Staudinger
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, Kansas
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Kim DH, Xiao Z, Kwon S, Sun X, Ryerson D, Tkac D, Ma P, Wu SY, Chiang CM, Zhou E, Xu HE, Palvimo JJ, Chen LF, Kemper B, Kemper JK. A dysregulated acetyl/SUMO switch of FXR promotes hepatic inflammation in obesity. EMBO J 2014; 34:184-99. [PMID: 25425577 DOI: 10.15252/embj.201489527] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Acetylation of transcriptional regulators is normally dynamically regulated by nutrient status but is often persistently elevated in nutrient-excessive obesity conditions. We investigated the functional consequences of such aberrantly elevated acetylation of the nuclear receptor FXR as a model. Proteomic studies identified K217 as the FXR acetylation site in diet-induced obese mice. In vivo studies utilizing acetylation-mimic and acetylation-defective K217 mutants and gene expression profiling revealed that FXR acetylation increased proinflammatory gene expression, macrophage infiltration, and liver cytokine and triglyceride levels, impaired insulin signaling, and increased glucose intolerance. Mechanistically, acetylation of FXR blocked its interaction with the SUMO ligase PIASy and inhibited SUMO2 modification at K277, resulting in activation of inflammatory genes. SUMOylation of agonist-activated FXR increased its interaction with NF-κB but blocked that with RXRα, so that SUMO2-modified FXR was selectively recruited to and trans-repressed inflammatory genes without affecting FXR/RXRα target genes. A dysregulated acetyl/SUMO switch of FXR in obesity may serve as a general mechanism for diminished anti-inflammatory response of other transcriptional regulators and provide potential therapeutic and diagnostic targets for obesity-related metabolic disorders.
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Affiliation(s)
- Dong-Hyun Kim
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Zhen Xiao
- Laboratory of Proteomics and Analytical Technologies, Advanced Technology Program, SAIC-Frederick, Inc. National Cancer Institute-Frederick, Frederick, MD, USA
| | - Sanghoon Kwon
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Xiaoxiao Sun
- Department of Statistics, University of Georgia, Athens, GA, USA
| | - Daniel Ryerson
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - David Tkac
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Ping Ma
- Department of Statistics, University of Georgia, Athens, GA, USA
| | - Shwu-Yuan Wu
- Simmons Comprehensive Cancer Center, Departments of Biochemistry and Pharmacology, University of Texas, Southwestern Medical Center, Dallas, TX, USA
| | - Cheng-Ming Chiang
- Simmons Comprehensive Cancer Center, Departments of Biochemistry and Pharmacology, University of Texas, Southwestern Medical Center, Dallas, TX, USA
| | - Edward Zhou
- Laboratory of Structure Sciences, Van Andel Research Institute, Grand Rapids, MI, USA
| | - H Eric Xu
- Laboratory of Structure Sciences, Van Andel Research Institute, Grand Rapids, MI, USA
| | - Jorma J Palvimo
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Lin-Feng Chen
- Department of Biochemistry, University of Illinois, Urbana, IL, USA
| | - Byron Kemper
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Jongsook Kim Kemper
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
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Stein S, Oosterveer MH, Mataki C, Xu P, Lemos V, Havinga R, Dittner C, Ryu D, Menzies KJ, Wang X, Perino A, Houten SM, Melchior F, Schoonjans K. SUMOylation-dependent LRH-1/PROX1 interaction promotes atherosclerosis by decreasing hepatic reverse cholesterol transport. Cell Metab 2014; 20:603-13. [PMID: 25176150 DOI: 10.1016/j.cmet.2014.07.023] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 06/12/2014] [Accepted: 07/24/2014] [Indexed: 12/22/2022]
Abstract
Reverse cholesterol transport (RCT) is an antiatherogenic process in which excessive cholesterol from peripheral tissues is transported to the liver and finally excreted from the body via the bile. The nuclear receptor liver receptor homolog 1 (LRH-1) drives expression of genes regulating RCT, and its activity can be modified by different posttranslational modifications. Here, we show that atherosclerosis-prone mice carrying a mutation that abolishes SUMOylation of LRH-1 on K289R develop less aortic plaques than control littermates when exposed to a high-cholesterol diet. The mechanism underlying this atheroprotection involves an increase in RCT and its associated hepatic genes and is secondary to a compromised interaction of LRH-1 K289R with the corepressor prospero homeobox protein 1 (PROX1). Our study reveals that the SUMOylation status of a single nuclear receptor lysine residue can impact the development of a complex metabolic disease such as atherosclerosis.
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Affiliation(s)
- Sokrates Stein
- Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Maaike H Oosterveer
- Department of Pediatrics, Center for Liver Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, 9700 RB Groningen, the Netherlands
| | - Chikage Mataki
- Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Pan Xu
- Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Vera Lemos
- Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Rick Havinga
- Department of Pediatrics, Center for Liver Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, 9700 RB Groningen, the Netherlands
| | - Claudia Dittner
- Zentrum für Molekulare Biologie Heidelberg (ZMBH), DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Joint Division Molecular Metabolic Control, Zentrum für Molekulare Biologie Heidelberg, Deutsches Krebsforschungszentrum (DKFZ) and University Hospital Heidelberg, DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany
| | - Dongryeol Ryu
- Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Keir J Menzies
- Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Xu Wang
- Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Alessia Perino
- Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Sander M Houten
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Frauke Melchior
- Zentrum für Molekulare Biologie Heidelberg (ZMBH), DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany
| | - Kristina Schoonjans
- Metabolic Signaling, Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
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Abstract
UNLABELLED Whether NF-κB promoter transactivation by the human T-cell leukemia virus type 1 (HTLV-1) Tax protein requires Tax SUMOylation is still a matter of debate. In this study, we revisited the role of Tax SUMOylation using a strategy based on the targeting of Ubc9, the unique E2 SUMO-conjugating enzyme. We show that either a catalytically inactive form of Ubc9 (Ubc9-C93S) or Ubc9 small interfering RNA (siRNA) dramatically reduces Tax conjugation to endogenous SUMO-1 or SUMO-2/3, demonstrating that as expected, Tax SUMOylation is under the control of the catalytic activity of Ubc9. We further report that a non-SUMOylated Tax protein produced in 293T cells is still able to activate either a transfected or an integrated NF-κB reporter promoter and to induce expression of an NF-κB-regulated endogenous gene. Importantly, blocking Ubc9 activity in T cells also results in the production of a non-SUMOylated Tax that is still fully functional for the activation of a NF-κB promoter. These results provide the definitive evidence that Tax SUMOylation is not required for NF-κB-driven gene induction. IMPORTANCE Human T-cell leukemia virus type 1 is able to transform CD4(+) T lymphocytes. The viral oncoprotein Tax plays a key role in this process by promoting cell proliferation and survival, mainly through permanent activation of the NF-κB pathway. Elucidating the molecular mechanisms involved in NF-κB pathway activation by Tax is therefore a key issue to understand HTLV-1-mediated transformation. Tax SUMOylation was initially proposed to be critical for Tax-induced NF-κB promoter activation, which was challenged by our later observation that a low-level-SUMOylated Tax mutant was still functional for activation of NF-κB promoters. To clarify the role of Tax SUMOylation, we set up a new approach based on the inhibition of the SUMOylation machinery in Tax-expressing cells. We show that blocking the SUMO-conjugating enzyme Ubc9 abolishes Tax SUMOylation and that a non-SUMOylated Tax still activates NF-κB promoters in either adherent cells or T cells.
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Electrophilic lipid mediator 15-deoxy-Δ12,14-prostaglandin j2 modifies glucocorticoid signaling via receptor SUMOylation. Mol Cell Biol 2014; 34:3202-13. [PMID: 24980431 DOI: 10.1128/mcb.00748-14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Cortisol, the central stress hormone in humans, activates the glucocorticoid receptor (GR). Anti-inflammatory effects are the most important pharmaceutical effects mediated by the GR. Inasmuch as electrophilic cyclopentenone prostaglandin 15-deoxy-Δ(12,14)-prostaglandin J2 (15d-PGJ2) has potent anti-inflammatory properties and activates the SUMOylation pathway, we have investigated the effect of 15d-PGJ2 on glucocorticoid signaling and receptor SUMOylation. To this end, we studied isogenic HEK293 cells expressing either wild-type GR or SUMOylation-defective GR. Interestingly, 15d-PGJ2 triggered SUMO-2 and -3 (SUMO-2/3) modification in the primary SUMOylation sites of the GR. Gene expression profiling and pathway analyses indicate that 15d-PGJ2 inhibits GR signaling in a genome-wide fashion that is significantly dependent on the GR SUMOylation sites. Chromatin immunoprecipitation assays showed that the repressive effect of 15d-PGJ2 on GR target gene expression occurs in parallel with the inhibition of receptor binding to the target gene chromatin. Furthermore, depletion of UBC9, the sole SUMO E2 conjugase, from HEK293 cells confirmed the involvement of active SUMOylation in the regulatory process. Taken together, our data indicate that GR SUMOylation modulates the glucocorticoid signaling during acute cell stress. Our data also suggest that GR SUMOylation modulates cross talk of the glucocorticoid signaling with other transcription factors that are responsive to cell stress.
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50
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Han M, Liang L, Liu LR, Yue J, Zhao YL, Xiao HP. Liver X receptor gene polymorphisms in tuberculosis: effect on susceptibility. PLoS One 2014; 9:e95954. [PMID: 24788534 PMCID: PMC4006844 DOI: 10.1371/journal.pone.0095954] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 04/02/2014] [Indexed: 01/06/2023] Open
Abstract
Objectives The Liver X receptors (LXRs), Liver X receptor A (LXRA) and Liver X receptor B (LXRB), regulate lipid metabolism and antimicrobial response. LXRs have a crucial role in the control of Mycobacterium tuberculosis (M.tb). Lacking LXRs mice is more susceptibility to infection M.tb, developing higher bacterial burdens and an increase in the size and number of granulomatous lesions. We aimed to assess the associations between single nucleotide polymorphisms (SNPs) in LXRs and risk of tuberculosis. Methods We sequenced the LXRs genes to detect SNPs and to examine genotypic frequencies in 600 patients and 620 healthy controls to investigate for associations with tuberculosis (TB) in the Chinese Han population. DNA re-sequencing revealed eight common variants in the LXRs genes. Results The G allele of rs1449627 and the T allele of rs1405655 demonstrated an increased risk of developing TB (p<0.001, p = 0.002), and the T allele of rs3758673, the T allele of rs2279238, and the C allele of rs1449626 in LXRA and the C allele of rs17373080, the G allele of rs2248949, and the C allele of rs1052677 in LXRB were protective against TB patients compared to healthy controls (p = 0.0002, p = 0.006, p<0.001, p = 0.004, p = 0.008, p = 0.003, respectively). All SNP genotypes were significantly associated with TB. An estimation of the frequencies of haplotypes revealed two potential risk haplotypes,GGCG in LXRB (p = 0.004,) and TTCG in LXRA (p<0.001, p = 0.004). Moreover, three protective haplotypes, TTAT and CCAT in LXRA and CATC in LXRB, were significantly “protective” (p = 0.008, p<0.001, p = 0.031) for TB. Furthermore, we determined that the LXRs SNPs were nominally associated with the clinical pattern of disease. Conclusions Our study data supported that LXRs play a fundamental role in the genetic susceptibility to TB and to different clinical patterns of disease. Thus, further investigation is required in larger populations and in additional areas.
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Affiliation(s)
- Min Han
- Shanghai Key Laboratory of Mycobacterium Tuberculosis, Shanghai Pulmonary Hospital Affiliated to Tongji University School of Medicine, Shanghai, P.R. China
| | - Li Liang
- Shanghai Key Laboratory of Mycobacterium Tuberculosis, Shanghai Pulmonary Hospital Affiliated to Tongji University School of Medicine, Shanghai, P.R. China
| | - Li-rong Liu
- Shanghai Key Laboratory of Mycobacterium Tuberculosis, Shanghai Pulmonary Hospital Affiliated to Tongji University School of Medicine, Shanghai, P.R. China
| | - Jun Yue
- Shanghai Key Laboratory of Mycobacterium Tuberculosis, Shanghai Pulmonary Hospital Affiliated to Tongji University School of Medicine, Shanghai, P.R. China
- * E-mail:
| | - Yan-lin Zhao
- National Center for Tuberculosis Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, P.R. China
| | - He-ping Xiao
- Shanghai Key Laboratory of Mycobacterium Tuberculosis, Shanghai Pulmonary Hospital Affiliated to Tongji University School of Medicine, Shanghai, P.R. China
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