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Li H, Bradbury JA, Edin ML, Gruzdev A, Li H, Graves JP, DeGraff LM, Lih FB, Feng C, Wolf ER, Bortner CD, London SJ, Sparks MA, Coffman TM, Zeldin DC. TXA2 attenuates allergic lung inflammation through regulation of Th2, Th9, and Treg differentiation. J Clin Invest 2024; 134:e165689. [PMID: 38483511 PMCID: PMC11060738 DOI: 10.1172/jci165689] [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: 01/03/2023] [Accepted: 03/12/2024] [Indexed: 05/02/2024] Open
Abstract
In lung, thromboxane A2 (TXA2) activates the TP receptor to induce proinflammatory and bronchoconstrictor effects. Thus, TP receptor antagonists and TXA2 synthase inhibitors have been tested as potential asthma therapeutics in humans. Th9 cells play key roles in asthma and regulate the lung immune response to allergens. Herein, we found that TXA2 reduces Th9 cell differentiation during allergic lung inflammation. Th9 cells were decreased approximately 2-fold and airway hyperresponsiveness was attenuated in lungs of allergic mice treated with TXA2. Naive CD4+ T cell differentiation to Th9 cells and IL-9 production were inhibited dose-dependently by TXA2 in vitro. TP receptor-deficient mice had an approximately 2-fold increase in numbers of Th9 cells in lungs in vivo after OVA exposure compared with wild-type mice. Naive CD4+ T cells from TP-deficient mice exhibited increased Th9 cell differentiation and IL-9 production in vitro compared with CD4+ T cells from wild-type mice. TXA2 also suppressed Th2 and enhanced Treg differentiation both in vitro and in vivo. Thus, in contrast to its acute, proinflammatory effects, TXA2 also has longer-lasting immunosuppressive effects that attenuate the Th9 differentiation that drives asthma progression. These findings may explain the paradoxical failure of anti-thromboxane therapies in the treatment of asthma.
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Affiliation(s)
- Hong Li
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - J. Alyce Bradbury
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - Matthew L. Edin
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - Artiom Gruzdev
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - Huiling Li
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - Joan P. Graves
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - Laura M. DeGraff
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - Fred B. Lih
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - Chiguang Feng
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - Erin R. Wolf
- Department of Nephrology, Duke University Medical Center, Durham, North Carolina, USA
| | - Carl D. Bortner
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - Stephanie J. London
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
| | - Matthew A. Sparks
- Department of Nephrology, Duke University Medical Center, Durham, North Carolina, USA
| | - Thomas M. Coffman
- Department of Nephrology, Duke University Medical Center, Durham, North Carolina, USA
- Program in Cardiovascular and Metabolic Disorders, Duke-NUS Medical School, Singapore
| | - Darryl C. Zeldin
- Division of Intramural Research, National Institute of Environmental Health Sciences/NIH, Research Triangle Park, North Carolina, USA
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2
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Yang S, Wang L, Wu Y, Wu A, Huang F, Tang X, Kantawong F, Anuchapreeda S, Qin D, Mei Q, Chen J, Huang X, Zhang C, Wu J. Apoptosis in megakaryocytes: Safeguard and threat for thrombopoiesis. Front Immunol 2023; 13:1025945. [PMID: 36685543 PMCID: PMC9845629 DOI: 10.3389/fimmu.2022.1025945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 12/09/2022] [Indexed: 01/06/2023] Open
Abstract
Platelets, generated from precursor megakaryocytes (MKs), are central mediators of hemostasis and thrombosis. The process of thrombopoiesis is extremely complex, regulated by multiple factors, and related to many cellular events including apoptosis. However, the role of apoptosis in thrombopoiesis has been controversial for many years. Some researchers believe that apoptosis is an ally of thrombopoiesis and platelets production is apoptosis-dependent, while others have suggested that apoptosis is dispensable for thrombopoiesis, and is even inhibited during this process. In this review, we will focus on this conflict, discuss the relationship between megakaryocytopoiesis, thrombopoiesis and apoptosis. In addition, we also consider why such a vast number of studies draw opposite conclusions of the role of apoptosis in thrombopoiesis, and try to figure out the truth behind the mystery. This review provides more comprehensive insights into the relationship between megakaryocytopoiesis, thrombopoiesis, and apoptosis and finds some clues for the possible pathological mechanisms of platelet disorders caused by abnormal apoptosis.
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Affiliation(s)
- Shuo Yang
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Long Wang
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Yuesong Wu
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Anguo Wu
- School of Pharmacy, Southwest Medical University, Luzhou, China
- Institute of Cardiovascular Research, the Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Feihong Huang
- School of Pharmacy, Southwest Medical University, Luzhou, China
- Institute of Cardiovascular Research, the Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Xiaoqin Tang
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Fahsai Kantawong
- Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Songyot Anuchapreeda
- Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Dalian Qin
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Qibing Mei
- School of Pharmacy, Southwest Medical University, Luzhou, China
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Jianping Chen
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Xinwu Huang
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Chunxiang Zhang
- Institute of Cardiovascular Research, the Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Jianming Wu
- School of Pharmacy, Southwest Medical University, Luzhou, China
- Institute of Cardiovascular Research, the Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
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3
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Garza-Domínguez R, Torres-Quiroz F. Evolutionary Signals in Coronaviral Structural Proteins Suggest Possible Complex Mechanisms of Post-Translational Regulation in SARS-CoV-2 Virus. Viruses 2022; 14:v14112469. [PMID: 36366566 PMCID: PMC9696223 DOI: 10.3390/v14112469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 10/18/2022] [Accepted: 10/31/2022] [Indexed: 11/11/2022] Open
Abstract
Post-translational regulation of proteins has emerged as a central topic of research in the field of functional proteomics. Post-translational modifications (PTMs) dynamically control the activities of proteins and are involved in a wide range of biological processes. Crosstalk between different types of PTMs represents a key mechanism of regulation and signaling. Due to the current pandemic of the novel and dangerous SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2) virus, here we present an in silico analysis of different types of PTMs in structural proteins of coronaviruses. A dataset of PTM sites was studied at three levels: conservation analysis, mutational analysis and crosstalk analysis. We identified two sets of PTMs which could have important functional roles in the regulation of the structural proteins of coronaviruses. Additionally, we found seven interesting signals of potential crosstalk events. These results reveal a higher level of complexity in the mechanisms of post-translational regulation of coronaviral proteins and provide new insights into the adaptation process of the SARS-CoV-2 virus.
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Aroankins TS, Murali SK, Fenton RA, Wu Q. The Hydrogen-Coupled Oligopeptide Membrane Cotransporter Pept2 is SUMOylated in Kidney Distal Convoluted Tubule Cells. Front Mol Biosci 2021; 8:790606. [PMID: 34881291 PMCID: PMC8646034 DOI: 10.3389/fmolb.2021.790606] [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: 10/07/2021] [Accepted: 11/08/2021] [Indexed: 11/13/2022] Open
Abstract
Protein post-translational modification by the Small Ubiquitin-like MOdifier (SUMO) on lysine residues is a reversible process highly important for transcription and protein stability. In the kidney, SUMOylation appears to be important for the cellular response to aldosterone. Therefore, in this study, we generated a SUMOylation profile of the aldosterone-sensitive kidney distal convoluted tubule (DCT) as a basis for understanding SUMOylation events in this cell type. Using mass spectrometry-based proteomics, 1037 SUMO1 and 552 SUMO2 sites, corresponding to 546 SUMO1 and 356 SUMO2 proteins, were identified from a modified mouse kidney DCT cell line (mpkDCT). SUMOylation of the renal hydrogen-coupled oligopeptide and drug co-transporter (Pept2) at one site (K139) was found to be highly regulated by aldosterone. Using immunolabelling of mouse kidney sections Pept2 was localized to DCT cells in vivo. Aldosterone stimulation of mpkDCT cell lines expressing wild-type Pept2 or mutant K139R-Pept2, post-transcriptionally increased Pept2 expression up to four-fold. Aldosterone decreased wild-type Pept2 abundance in the apical membrane domain of mpkDCT cells, but this response was absent in K139R-Pept2 expressing cells. In summary, we have generated a SUMOylation landscape of the mouse DCT and determined that SUMOylation plays an important role in the physiological regulation of Pept2 trafficking by aldosterone.
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Affiliation(s)
- Takwa S Aroankins
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Anesthesiology and Intensive Care, Sahlgrenska University Hospital, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | | | - Robert A Fenton
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Qi Wu
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
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5
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Wrestling and Wrapping: A Perspective on SUMO Proteins in Schwann Cells. Biomolecules 2021; 11:biom11071055. [PMID: 34356679 PMCID: PMC8301837 DOI: 10.3390/biom11071055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/12/2021] [Accepted: 07/13/2021] [Indexed: 11/20/2022] Open
Abstract
Schwann cell development and peripheral nerve myelination are finely orchestrated multistep processes; some of the underlying mechanisms are well described and others remain unknown. Many posttranslational modifications (PTMs) like phosphorylation and ubiquitination have been reported to play a role during the normal development of the peripheral nervous system (PNS) and in demyelinating neuropathies. However, a relatively novel PTM, SUMOylation, has not been studied in these contexts. SUMOylation involves the covalent attachment of one or more small ubiquitin-like modifier (SUMO) proteins to a substrate, which affects the function, cellular localization, and further PTMs of the conjugated protein. SUMOylation also regulates other proteins indirectly by facilitating non-covalent protein–protein interaction via SUMO interaction motifs (SIM). This pathway has important consequences on diverse cellular processes, and dysregulation of this pathway has been reported in several diseases including neurological and degenerative conditions. In this article, we revise the scarce literature on SUMOylation in Schwann cells and the PNS, we propose putative substrate proteins, and we speculate on potential mechanisms underlying the possible involvement of this PTM in peripheral myelination and neuropathies.
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6
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Hernandez-Valladares M, Wangen R, Berven FS, Guldbrandsen A. Protein Post-Translational Modification Crosstalk in Acute Myeloid Leukemia Calls for Action. Curr Med Chem 2019; 26:5317-5337. [PMID: 31241430 DOI: 10.2174/0929867326666190503164004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 11/23/2018] [Accepted: 02/01/2019] [Indexed: 01/24/2023]
Abstract
BACKGROUND Post-translational modification (PTM) crosstalk is a young research field. However, there is now evidence of the extraordinary characterization of the different proteoforms and their interactions in a biological environment that PTM crosstalk studies can describe. Besides gene expression and phosphorylation profiling of acute myeloid leukemia (AML) samples, the functional combination of several PTMs that might contribute to a better understanding of the complexity of the AML proteome remains to be discovered. OBJECTIVE By reviewing current workflows for the simultaneous enrichment of several PTMs and bioinformatics tools to analyze mass spectrometry (MS)-based data, our major objective is to introduce the PTM crosstalk field to the AML research community. RESULTS After an introduction to PTMs and PTM crosstalk, this review introduces several protocols for the simultaneous enrichment of PTMs. Two of them allow a simultaneous enrichment of at least three PTMs when using 0.5-2 mg of cell lysate. We have reviewed many of the bioinformatics tools used for PTM crosstalk discovery as its complex data analysis, mainly generated from MS, becomes challenging for most AML researchers. We have presented several non-AML PTM crosstalk studies throughout the review in order to show how important the characterization of PTM crosstalk becomes for the selection of disease biomarkers and therapeutic targets. CONCLUSION Herein, we have reviewed the advances and pitfalls of the emerging PTM crosstalk field and its potential contribution to unravel the heterogeneity of AML. The complexity of sample preparation and bioinformatics workflows demands a good interaction between experts of several areas.
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Affiliation(s)
- Maria Hernandez-Valladares
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Jonas Lies vei 87, N-5021 Bergen, Norway.,The Proteomics Unit at the University of Bergen, Department of Biomedicine, Building for Basic Biology, Faculty of Medicine, University of Bergen, Jonas Lies vei 91, N-5009 Bergen, Norway
| | - Rebecca Wangen
- Department of Clinical Science, Faculty of Medicine, University of Bergen, Jonas Lies vei 87, N-5021 Bergen, Norway.,The Proteomics Unit at the University of Bergen, Department of Biomedicine, Building for Basic Biology, Faculty of Medicine, University of Bergen, Jonas Lies vei 91, N-5009 Bergen, Norway.,Department of Internal Medicine, Hematology Section, Haukeland University Hospital, Jonas Lies vei 65, N-5021 Bergen, Norway
| | - Frode S Berven
- The Proteomics Unit at the University of Bergen, Department of Biomedicine, Building for Basic Biology, Faculty of Medicine, University of Bergen, Jonas Lies vei 91, N-5009 Bergen, Norway
| | - Astrid Guldbrandsen
- The Proteomics Unit at the University of Bergen, Department of Biomedicine, Building for Basic Biology, Faculty of Medicine, University of Bergen, Jonas Lies vei 91, N-5009 Bergen, Norway.,Computational Biology Unit, Department of Informatics, Faculty of Mathematics and Natural Sciences, University of Bergen, Thormøhlensgt 55, N-5008 Bergen, Norway
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7
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Tomasi ML, Ramani K. SUMOylation and phosphorylation cross-talk in hepatocellular carcinoma. Transl Gastroenterol Hepatol 2018; 3:20. [PMID: 29780898 DOI: 10.21037/tgh.2018.04.04] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 04/11/2018] [Indexed: 01/22/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is a primary malignancy of the liver and occurs predominantly in patients with underlying chronic liver disease and cirrhosis. The large spectrum of protein post-translational modification (PTM) includes numerous critical signaling events that occur during neoplastic transformation. PTMs occur to nearly all proteins and increase the functional diversity of proteins. We have reviewed the role of two major PTMs, SUMOylation and phosphorylation, in the altered signaling of key players in HCC. SUMOylation is a PTM that involves addition of a small ubiquitin-like modifiers (SUMO) group to proteins. It is known to regulate protein stability, protein-protein interactions, trafficking and transcriptional activity. The major pathways that are regulated by SUMOylation and may influence HCC are regulation of transcription, cell growth pathways associated with B-cell lymphoma 2 (Bcl-2) and methionine adenosyltransferases (MAT), oxidative stress pathways [nuclear erythroid 2-related factor 2 (Nrf2)], tumor suppressor pathways (p53), hypoxia-inducible signaling [hypoxia-inducible factor-1 (HIF-1)], glucose and lipid metabolism, nuclear factor kappa B (NF-κB) and β-Catenin signaling. Phosphorylation is an extensively studied PTM in HCC. The mitogen-activated protein kinase (MAPK), phosphatidyl inositol/AK-strain transforming (PI3K/AKT), and C-SRC pathways have been extensively studied for deregulation of kinases and alteration in signaling of targets through phosphorylation of their substrates. Cross-talk between phosphorylation and SUMOylation is known to influence transcriptional activity of proteins and protein-protein interactions. In HCC, several SUMOylation-dependent phosphorylation events have been studied such as MAPK activation and c-SRC activity that have been reviewed in this work. The drastic effects of site-specific phosphorylation or SUMOylation on enzyme activity of signaling players and its effect on growth and tumorigenesis suggests that these PTMs are novel targets for therapeutic intervention in HCC.
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Affiliation(s)
- Maria Lauda Tomasi
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Komal Ramani
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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Tan LH, Bahmed K, Lin CR, Marchetti N, Bolla S, Criner GJ, Kelsen S, Madesh M, Kosmider B. The cytoprotective role of DJ-1 and p45 NFE2 against human primary alveolar type II cell injury and emphysema. Sci Rep 2018; 8:3555. [PMID: 29476075 PMCID: PMC5824795 DOI: 10.1038/s41598-018-21790-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 02/06/2018] [Indexed: 12/11/2022] Open
Abstract
Emphysema is characterized by irreversibly enlarged airspaces and destruction of alveolar walls. One of the factors contributing to this disease pathogenesis is an elevation in extracellular matrix (ECM) degradation in the lung. Alveolar type II (ATII) cells produce and secrete pulmonary surfactants and proliferate to restore the epithelium after damage. We isolated ATII cells from control non-smokers, smokers and patients with emphysema to determine the role of NFE2 (nuclear factor, erythroid-derived 2). NFE2 is a heterodimer composed of two subunits, a 45 kDa (p45 NFE2) and 18 kDa (p18 NFE2) polypeptides. Low expression of p45 NFE2 in patients with emphysema correlated with a high ECM degradation. Moreover, we found that NFE2 knockdown increased cell death induced by cigarette smoke extract. We also studied the cross talk between p45 NFE2 and DJ-1. DJ-1 protein is a redox-sensitive chaperone that protects cells from oxidative stress. We detected that cigarette smoke significantly increased p45 NFE2 levels in DJ-1 KO mice compared to wild-type mice. Our results indicate that p45 NFE2 expression is induced by exposure to cigarette smoke, has a cytoprotective activity against cell injury, and its downregulation in human primary ATII cells may contribute to emphysema pathogenesis.
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Affiliation(s)
- Li Hui Tan
- Department of Thoracic Medicine and Surgery, Temple University, Philadelphia, PA, 19140, United States.,Center for Inflammation, Translational and Clinical Lung Research, Temple University, Philadelphia, PA, 19140, United States
| | - Karim Bahmed
- Department of Thoracic Medicine and Surgery, Temple University, Philadelphia, PA, 19140, United States.,Center for Inflammation, Translational and Clinical Lung Research, Temple University, Philadelphia, PA, 19140, United States
| | - Chih-Ru Lin
- Department of Thoracic Medicine and Surgery, Temple University, Philadelphia, PA, 19140, United States.,Center for Inflammation, Translational and Clinical Lung Research, Temple University, Philadelphia, PA, 19140, United States
| | - Nathaniel Marchetti
- Department of Thoracic Medicine and Surgery, Temple University, Philadelphia, PA, 19140, United States.,Center for Inflammation, Translational and Clinical Lung Research, Temple University, Philadelphia, PA, 19140, United States
| | - Sudhir Bolla
- Department of Thoracic Medicine and Surgery, Temple University, Philadelphia, PA, 19140, United States.,Center for Inflammation, Translational and Clinical Lung Research, Temple University, Philadelphia, PA, 19140, United States
| | - Gerard J Criner
- Department of Thoracic Medicine and Surgery, Temple University, Philadelphia, PA, 19140, United States.,Center for Inflammation, Translational and Clinical Lung Research, Temple University, Philadelphia, PA, 19140, United States
| | - Steven Kelsen
- Department of Thoracic Medicine and Surgery, Temple University, Philadelphia, PA, 19140, United States.,Center for Inflammation, Translational and Clinical Lung Research, Temple University, Philadelphia, PA, 19140, United States
| | - Muniswamy Madesh
- Medical Genetics and Molecular Biochemistry, Temple University, Philadelphia, PA, 19140, United States
| | - Beata Kosmider
- Department of Thoracic Medicine and Surgery, Temple University, Philadelphia, PA, 19140, United States. .,Center for Inflammation, Translational and Clinical Lung Research, Temple University, Philadelphia, PA, 19140, United States. .,Department of Physiology, Temple University, Philadelphia, PA, 19140, United States.
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Gasiorek JJ, Blank V. Regulation and function of the NFE2 transcription factor in hematopoietic and non-hematopoietic cells. Cell Mol Life Sci 2015; 72:2323-35. [PMID: 25721735 PMCID: PMC11114048 DOI: 10.1007/s00018-015-1866-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 01/27/2015] [Accepted: 02/16/2015] [Indexed: 01/01/2023]
Abstract
The NFE2 transcription factor was identified over 25 years ago. The NFE2 protein forms heterodimers with small MAF proteins, and the resulting complex binds to regulatory elements in a large number of target genes. In contrast to other CNC transcription family members including NFE2L1 (NRF1), NFE2L2 (NRF2) and NFE2L3 (NRF3), which are widely expressed, earlier studies had suggested that the major sites of NFE2 expression are hematopoietic cells. Based on cell culture studies it was proposed that this protein acts as a critical regulator of globin gene expression. However, the knockout mouse model displayed only mild erythroid abnormalities, while the major phenotype was a defect in megakaryocyte biogenesis. Indeed, absence of NFE2 led to severely impaired platelet production. A series of recent data, also summarized here, shed new light on the various functional roles of NFE2 and the regulation of its activity. NFE2 is part of a complex regulatory network, including transcription factors such as GATA1 and RUNX1, controlling megakaryocytic and/or erythroid cell function. Surprisingly, it was recently found that NFE2 also has a role in non-hematopoietic tissues, such as the trophoblast, in which it is also expressed, as well as the bone, opening the door to new research areas for this transcription factor. Additional data showed that NFE2 function is controlled by a series of posttranslational modifications. Important strides have been made with respect to the clinical significance of NFE2, linking this transcription factor to hematological disorders such as polycythemias.
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Affiliation(s)
- Jadwiga J. Gasiorek
- Lady Davis Institute for Medical Research, McGill University, 3755 Chemin de la Côte Sainte-Catherine, Montreal, QC H3T 1E2 Canada
- Department of Medicine, McGill University, Montreal, QC Canada
| | - Volker Blank
- Lady Davis Institute for Medical Research, McGill University, 3755 Chemin de la Côte Sainte-Catherine, Montreal, QC H3T 1E2 Canada
- Department of Medicine, McGill University, Montreal, QC Canada
- Department of Physiology, McGill University, Montreal, QC Canada
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