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Li Y, Vyas SP, Mehta I, Asada N, Dey I, Taylor TC, Bechara R, Amatya N, Aggor FEY, Coleman BM, Li DD, Yamamoto K, Ezenwa O, Sun Y, Sterneck E, McManus CJ, Panzer U, Biswas PS, Savan R, Das J, Gaffen SL. The RNA binding protein Arid5a drives IL-17-dependent autoantibody-induced glomerulonephritis. J Exp Med 2024; 221:e20240656. [PMID: 39058386 DOI: 10.1084/jem.20240656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 06/06/2024] [Accepted: 06/17/2024] [Indexed: 07/28/2024] Open
Abstract
Autoantibody-mediated glomerulonephritis (AGN) arises from dysregulated renal inflammation, with urgent need for improved treatments. IL-17 is implicated in AGN and drives pathology in a kidney-intrinsic manner via renal tubular epithelial cells (RTECs). Nonetheless, downstream signaling mechanisms provoking kidney pathology are poorly understood. A noncanonical RNA binding protein (RBP), Arid5a, was upregulated in human and mouse AGN. Arid5a-/- mice were refractory to AGN, with attenuated myeloid infiltration and impaired expression of IL-17-dependent cytokines and transcription factors (C/EBPβ, C/EBPδ). Transcriptome-wide RIP-Seq revealed that Arid5a inducibly interacts with conventional IL-17 target mRNAs, including CEBPB and CEBPD. Unexpectedly, many Arid5a RNA targets corresponded to translational regulation and RNA processing pathways, including rRNAs. Indeed, global protein synthesis was repressed in Arid5a-deficient cells, and C/EBPs were controlled at the level of protein rather than RNA accumulation. IL-17 prompted Arid5a nuclear export and association with 18S rRNA, a 40S ribosome constituent. Accordingly, IL-17-dependent renal autoimmunity is driven by Arid5a at the level of ribosome interactions and translation.
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Affiliation(s)
- Yang Li
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Shachi P Vyas
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Isha Mehta
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nariaki Asada
- III Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Translational Immunology, University Medical Center Hamburg-Eppendorf , Hamburg, Germany
| | - Ipsita Dey
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Tiffany C Taylor
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Rami Bechara
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nilesh Amatya
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Felix E Y Aggor
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Bianca M Coleman
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - De-Dong Li
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Kenta Yamamoto
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Ogechukwu Ezenwa
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Yeque Sun
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Esta Sterneck
- Laboratory of Cell and Developmental Signaling, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA
| | - C Joel McManus
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Ulf Panzer
- III Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Translational Immunology, University Medical Center Hamburg-Eppendorf , Hamburg, Germany
| | - Partha S Biswas
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Ram Savan
- Department of Immunology, School of Medicine, University of Washington, Seattle, WA, USA
| | - Jishnu Das
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sarah L Gaffen
- Division of Rheumatology & Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
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2
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Bataclan M, Leoni C, Moro SG, Pecoraro M, Wong EH, Heissmeyer V, Monticelli S. Crosstalk between Regnase-1 and -3 shapes mast cell survival and cytokine expression. Life Sci Alliance 2024; 7:e202402784. [PMID: 38830770 PMCID: PMC11147952 DOI: 10.26508/lsa.202402784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/17/2024] [Accepted: 05/22/2024] [Indexed: 06/05/2024] Open
Abstract
Post-transcriptional regulation of immune-related transcripts by RNA-binding proteins (RBPs) impacts immune cell responses, including mast cell functionality. Despite their importance in immune regulation, the functional role of most RBPs remains to be understood. By manipulating the expression of specific RBPs in murine mast cells, coupled with mass spectrometry and transcriptomic analyses, we found that the Regnase family of proteins acts as a potent regulator of mast cell physiology. Specifically, Regnase-1 is required to maintain basic cell proliferation and survival, whereas both Regnase-1 and -3 cooperatively regulate the expression of inflammatory transcripts upon activation, with Tnf being a primary target in both human and mouse cells. Furthermore, Regnase-3 directly interacts with Regnase-1 in mast cells and is necessary to restrain Regnase-1 expression through the destabilization of its transcript. Overall, our study identifies protein interactors of endogenously expressed Regnase factors, characterizes the regulatory interplay between Regnase family members in mast cells, and establishes their role in the control of mast cell homeostasis and inflammatory responses.
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Affiliation(s)
- Marian Bataclan
- https://ror.org/05gfswd81 Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
| | - Cristina Leoni
- https://ror.org/05gfswd81 Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
| | - Simone G Moro
- https://ror.org/05gfswd81 Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
| | - Matteo Pecoraro
- https://ror.org/05gfswd81 Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
| | - Elaine H Wong
- Institute for Immunology, Biomedical Center, Faculty of Medicine, Ludwig-Maximilians-Universität in Munich, Planegg-Martinsried, Germany
| | - Vigo Heissmeyer
- Institute for Immunology, Biomedical Center, Faculty of Medicine, Ludwig-Maximilians-Universität in Munich, Planegg-Martinsried, Germany
- Research Unit Molecular Immune Regulation, Helmholtz Zentrum München, Munich, Germany
| | - Silvia Monticelli
- https://ror.org/05gfswd81 Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
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3
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Wimberger N, Ober F, Avar G, Grau M, Xu W, Lenz G, Menden MP, Krappmann D. Oncogene-induced MALT1 protease activity drives posttranscriptional gene expression in malignant lymphomas. Blood 2023; 142:1985-2001. [PMID: 37623434 PMCID: PMC10733837 DOI: 10.1182/blood.2023021299] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/13/2023] [Accepted: 07/26/2023] [Indexed: 08/26/2023] Open
Abstract
Constitutive mucosa-associated lymphoid tissue lymphoma translocation protein 1 (MALT1) activity drives survival of malignant lymphomas addicted to chronic B-cell receptor signaling, oncogenic CARD11, or the API2-MALT1 (also BIRC3::MALT1) fusion oncoprotein. Although MALT1 scaffolding induces NF-κB-dependent survival signaling, MALT1 protease function is thought to augment NF-κB activation by cleaving signaling mediators and transcriptional regulators in B-cell lymphomas. However, the pathological role of MALT1 protease function in lymphomagenesis is not well understood. Here, we show that TRAF6 controls MALT1-dependent activation of NF-κB transcriptional responses but is dispensable for MALT1 protease activation driven by oncogenic CARD11. To uncouple enzymatic and nonenzymatic functions of MALT1, we analyzed TRAF6-dependent and -independent as well as MALT1 protease-dependent gene expression profiles downstream of oncogenic CARD11 and API2-MALT1. The data suggest that by cleaving and inactivating the RNA binding proteins Regnase-1 and Roquin-1/2, MALT1 protease induces posttranscriptional upregulation of many genes including NFKBIZ/IκBζ, NFKBID/IκBNS, and ZC3H12A/Regnase-1 in activated B-cell-like diffuse large B-cell lymphoma (ABC DLBCL). We demonstrate that oncogene-driven MALT1 activity in ABC DLBCL cells regulates NFKBIZ and NFKBID induction on an mRNA level via releasing a brake imposed by Regnase-1 and Roquin-1/2. Furthermore, MALT1 protease drives posttranscriptional gene induction in the context of the API2-MALT1 fusion created by the recurrent t(11;18)(q21;q21) translocation in MALT lymphoma. Thus, MALT1 paracaspase acts as a bifurcation point for enhancing transcriptional and posttranscriptional gene expression in malignant lymphomas. Moreover, the identification of MALT1 protease-selective target genes provides specific biomarkers for the clinical evaluation of MALT1 inhibitors.
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Affiliation(s)
- Nicole Wimberger
- Research Unit Signaling and Translation, Group Signaling and Immunity, Molecular Targets Therapeutic Center, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Franziska Ober
- Research Unit Signaling and Translation, Group Signaling and Immunity, Molecular Targets Therapeutic Center, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Göksu Avar
- Department of Computational Health, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Department of Biology, Ludwig Maximilian University Munich, Martinsried, Germany
| | - Michael Grau
- Department of Medicine A, Hematology, Oncology, and Pneumology, University Hospital Muenster, Muenster, Germany
| | - Wendan Xu
- Department of Medicine A, Hematology, Oncology, and Pneumology, University Hospital Muenster, Muenster, Germany
| | - Georg Lenz
- Department of Medicine A, Hematology, Oncology, and Pneumology, University Hospital Muenster, Muenster, Germany
| | - Michael P. Menden
- Department of Computational Health, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Department of Biology, Ludwig Maximilian University Munich, Martinsried, Germany
- Department of Biochemistry and Pharmacology, The University of Melbourne, Melbourne, Australia
| | - Daniel Krappmann
- Research Unit Signaling and Translation, Group Signaling and Immunity, Molecular Targets Therapeutic Center, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Department of Biology, Ludwig Maximilian University Munich, Martinsried, Germany
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4
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Kouri VP, Olkkonen J, Nurmi K, Peled N, Ainola M, Mandelin J, Nordström DC, Eklund KK. IL-17A and TNF synergistically drive expression of proinflammatory mediators in synovial fibroblasts via IκBζ-dependent induction of ELF3. Rheumatology (Oxford) 2023; 62:872-885. [PMID: 35792833 PMCID: PMC9891425 DOI: 10.1093/rheumatology/keac385] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 06/20/2022] [Accepted: 06/25/2022] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVE IL-17A and TNF act in synergy to induce proinflammatory mediators in synovial fibroblasts thus contributing to diseases associated with chronic arthritis. Many of these factors are regulated by transcription factor E74-like factor-3 (ELF3). Therefore, we sought to investigate ELF3 as a downstream target of IL-17A and TNF signalling and to characterize its role in the molecular mechanism of synergy between IL-17A and TNF. METHODS Regulation of ELF3 expression by IL-17A and TNF was studied in synovial fibroblasts of RA and OA patients and RA synovial explants. Signalling leading to ELF3 mRNA induction and the impact of ELF3 on the response to IL-17A and TNF were studied using siRNA, transient overexpression and signalling inhibitors in synovial fibroblasts and HEK293 cells. RESULTS ELF3 was marginally affected by IL-17A or TNF alone, but their combination resulted in high and sustained expression. ELF3 expression was regulated by the nuclear factor-κB (NF-κB) pathway and CCAAT/enhancer-binding protein β (C/EBPβ), but its induction required synthesis of the NF-κB co-factor IκB (inhibitor of NF-κB) ζ. siRNA-mediated depletion of ELF3 attenuated the induction of cytokines and matrix metalloproteinases by the combination of IL-17A and TNF. Overexpression of ELF3 or IκBζ showed synergistic effect with TNF in upregulating expression of chemokine (C-C motif) ligand 8 (CCL8), and depletion of ELF3 abrogated CCL8 mRNA induction by the combination of IκBζ overexpression and TNF. CONCLUSION Altogether, our results establish ELF3 as an important mediator of the synergistic effect of IL-17A and TNF in synovial fibroblasts. The findings provide novel information of the pathogenic mechanisms of IL-17A in chronic arthritis and implicate ELF3 as a potential therapeutic target.
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Affiliation(s)
- Vesa-Petteri Kouri
- Department of Medicine, University of Helsinki and Helsinki University Hospital.,Translational Immunology Research Program, Research Programs Unit, University of Helsinki.,Department of Clinical Chemistry, University of Helsinki and Helsinki University Hospital
| | - Juri Olkkonen
- Department of Medicine, University of Helsinki and Helsinki University Hospital.,Translational Immunology Research Program, Research Programs Unit, University of Helsinki
| | - Katariina Nurmi
- Department of Medicine, University of Helsinki and Helsinki University Hospital.,Translational Immunology Research Program, Research Programs Unit, University of Helsinki
| | - Nitai Peled
- Department of Medicine, University of Helsinki and Helsinki University Hospital.,Translational Immunology Research Program, Research Programs Unit, University of Helsinki
| | - Mari Ainola
- Department of Medicine, University of Helsinki and Helsinki University Hospital.,Translational Immunology Research Program, Research Programs Unit, University of Helsinki
| | - Jami Mandelin
- Department of Medicine, University of Helsinki and Helsinki University Hospital.,Translational Immunology Research Program, Research Programs Unit, University of Helsinki
| | - Dan C Nordström
- Department of Medicine, University of Helsinki and Helsinki University Hospital.,Translational Immunology Research Program, Research Programs Unit, University of Helsinki.,Department of Internal Medicine and Rehabilitation
| | - Kari K Eklund
- Department of Medicine, University of Helsinki and Helsinki University Hospital.,Translational Immunology Research Program, Research Programs Unit, University of Helsinki.,Inflammation Center, Division of Rheumatology, Helsinki University Hospital.,ORTON Orthopaedic Hospital of the Orton Foundation, Helsinki, Finland
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5
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Behrens G, Heissmeyer V. Cooperation of RNA-Binding Proteins – a Focus on Roquin Function in T Cells. Front Immunol 2022; 13:839762. [PMID: 35251035 PMCID: PMC8894612 DOI: 10.3389/fimmu.2022.839762] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 01/31/2022] [Indexed: 12/18/2022] Open
Abstract
Post-transcriptional gene regulation by RNA-binding proteins (RBPs) is important in the prevention of inflammatory and autoimmune diseases. With respect to T cell activation and differentiation, the RBPs Roquin-1/2 and Regnase-1 play pivotal roles by inducing degradation and/or translational silencing of target mRNAs. These targets encode important proinflammatory mediators and thus Roquin and Regnase-1 functions dampen cellular programs that can lead to inflammation and autoimmune disease. Recent findings demonstrate direct physical interaction of both RBPs. Here, we propose that cooperativity of trans-acting factors may be more generally used to reinforce the regulatory impact on selected targets and promote specific cell fate decisions. We develop this concept for Roquin and Regnase-1 function in resting and activated T cells and discuss the involvement in autoimmunity as well as how the therapeutic potential can be used in anti-tumor therapies.
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Affiliation(s)
- Gesine Behrens
- Institute for Immunology, Biomedical Center (BMC), Faculty of Medicine, Ludwig-Maximilians-Universität in Munich, Planegg-Martinsried, Germany
| | - Vigo Heissmeyer
- Institute for Immunology, Biomedical Center (BMC), Faculty of Medicine, Ludwig-Maximilians-Universität in Munich, Planegg-Martinsried, Germany
- Research Unit Molecular Immune Regulation, Helmholtz Zentrum München, Munich, Germany
- *Correspondence: Vigo Heissmeyer,
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6
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Nicolet BP, Zandhuis ND, Lattanzio VM, Wolkers MC. Sequence determinants as key regulators in gene expression of T cells. Immunol Rev 2021; 304:10-29. [PMID: 34486113 PMCID: PMC9292449 DOI: 10.1111/imr.13021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/09/2021] [Accepted: 08/17/2021] [Indexed: 12/12/2022]
Abstract
T cell homeostasis, T cell differentiation, and T cell effector function rely on the constant fine-tuning of gene expression. To alter the T cell state, substantial remodeling of the proteome is required. This remodeling depends on the intricate interplay of regulatory mechanisms, including post-transcriptional gene regulation. In this review, we discuss how the sequence of a transcript influences these post-transcriptional events. In particular, we review how sequence determinants such as sequence conservation, GC content, and chemical modifications define the levels of the mRNA and the protein in a T cell. We describe the effect of different forms of alternative splicing on mRNA expression and protein production, and their effect on subcellular localization. In addition, we discuss the role of sequences and structures as binding hubs for miRNAs and RNA-binding proteins in T cells. The review thus highlights how the intimate interplay of post-transcriptional mechanisms dictate cellular fate decisions in T cells.
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Affiliation(s)
- Benoit P. Nicolet
- Department of HematopoiesisSanquin Research and Landsteiner LaboratoryAmsterdam UMCUniversity of AmsterdamAmsterdamThe Netherlands
- Oncode InstituteUtrechtThe Netherlands
| | - Nordin D. Zandhuis
- Department of HematopoiesisSanquin Research and Landsteiner LaboratoryAmsterdam UMCUniversity of AmsterdamAmsterdamThe Netherlands
- Oncode InstituteUtrechtThe Netherlands
| | - V. Maria Lattanzio
- Department of HematopoiesisSanquin Research and Landsteiner LaboratoryAmsterdam UMCUniversity of AmsterdamAmsterdamThe Netherlands
- Oncode InstituteUtrechtThe Netherlands
| | - Monika C. Wolkers
- Department of HematopoiesisSanquin Research and Landsteiner LaboratoryAmsterdam UMCUniversity of AmsterdamAmsterdamThe Netherlands
- Oncode InstituteUtrechtThe Netherlands
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7
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Terminal uridyltransferase 7 regulates TLR4-triggered inflammation by controlling Regnase-1 mRNA uridylation and degradation. Nat Commun 2021; 12:3878. [PMID: 34188032 PMCID: PMC8241994 DOI: 10.1038/s41467-021-24177-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 06/04/2021] [Indexed: 12/13/2022] Open
Abstract
Different levels of regulatory mechanisms, including posttranscriptional regulation, are needed to elaborately regulate inflammatory responses to prevent harmful effects. Terminal uridyltransferase 7 (TUT7) controls RNA stability by adding uridines to its 3′ ends, but its function in innate immune response remains obscure. Here we reveal that TLR4 activation induces TUT7, which in turn selectively regulates the production of a subset of cytokines, including Interleukin 6 (IL-6). TUT7 regulates IL-6 expression by controlling ribonuclease Regnase-1 mRNA (encoded by Zc3h12a gene) stability. Mechanistically, TLR4 activation causes TUT7 to bind directly to the stem-loop structure on Zc3h12a 3′-UTR, thereby promotes Zc3h12a uridylation and degradation. Zc3h12a from LPS-treated TUT7-sufficient macrophages possesses increased oligo-uridylated ends with shorter poly(A) tails, whereas oligo-uridylated Zc3h12a is significantly reduced in Tut7-/- cells after TLR4 activation. Together, our findings reveal the functional role of TUT7 in sculpting TLR4-driven responses by modulating mRNA stability of a selected set of inflammatory mediators. Terminal uridyltransferase 7 (TUT7) adds U-tails on diverse RNAs to promote degradation. Here the authors show that TUT7 is induced upon LPS treatment in macrophages and promotes decay of Regnase-1, thereby regulating the expression of a subset of cytokines, including IL-6.
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8
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Bhat N, Virgen-Slane R, Ramezani-Rad P, Leung CR, Chen C, Balsells D, Shukla A, Kao E, Apgar JR, Fu M, Ware CF, Rickert RC. Regnase-1 is essential for B cell homeostasis to prevent immunopathology. J Exp Med 2021; 218:e20200971. [PMID: 33822844 PMCID: PMC8025244 DOI: 10.1084/jem.20200971] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 01/06/2021] [Accepted: 02/22/2021] [Indexed: 12/26/2022] Open
Abstract
Regnase-1 is an emerging regulator of immune responses with essential roles in the posttranscriptional control of immune cell activation. Regnase-1 is expressed in B cells; however, its B cell-specific functions remain unknown. Here, we demonstrate that Regnase-1 prevents severe autoimmune pathology and show its essential role in maintaining B cell homeostasis. Using Cre driver mice for ablation of Regnase-1 at various stages of B cell development, we demonstrate that loss of Regnase-1 leads to aberrant B cell activation and differentiation, resulting in systemic autoimmunity and early morbidity. The basis of these findings was informed by gene expression data revealing a regulatory role for Regnase-1 in the suppression of a transcriptional program that promotes B cell activation, survival, and differentiation. Overall, our study shows that Regnase-1 exerts critical control of B cell activation, which is required for prevention of immunopathology.
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Affiliation(s)
- Numana Bhat
- Tumor Microenvironment and Cancer Immunology Program, National Cancer Institute designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Richard Virgen-Slane
- Laboratory of Molecular Immunology, Infectious and Inflammatory Diseases Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Parham Ramezani-Rad
- Tumor Microenvironment and Cancer Immunology Program, National Cancer Institute designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Charlotte R. Leung
- Tumor Microenvironment and Cancer Immunology Program, National Cancer Institute designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Cindi Chen
- Tumor Microenvironment and Cancer Immunology Program, National Cancer Institute designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Daniel Balsells
- Tumor Microenvironment and Cancer Immunology Program, National Cancer Institute designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Ashima Shukla
- Tumor Microenvironment and Cancer Immunology Program, National Cancer Institute designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Elaine Kao
- Tumor Microenvironment and Cancer Immunology Program, National Cancer Institute designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - John R. Apgar
- Tumor Microenvironment and Cancer Immunology Program, National Cancer Institute designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Mingui Fu
- Department of Biomedical Science and Shock/Trauma Research Center, School of Medicine, University of Missouri–Kansas City, Kansas City, MO
| | - Carl F. Ware
- Laboratory of Molecular Immunology, Infectious and Inflammatory Diseases Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Robert C. Rickert
- Tumor Microenvironment and Cancer Immunology Program, National Cancer Institute designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
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9
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Nowak I, Boratyn E, Student S, Bernhart SF, Fallmann J, Durbas M, Stadler PF, Rokita H. MCPIP1 ribonuclease can bind and cleave AURKA mRNA in MYCN-amplified neuroblastoma cells. RNA Biol 2021; 18:144-156. [PMID: 32757706 PMCID: PMC7834091 DOI: 10.1080/15476286.2020.1804698] [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: 04/17/2020] [Revised: 06/18/2020] [Accepted: 07/28/2020] [Indexed: 02/08/2023] Open
Abstract
The role of the inflammation-silencing ribonuclease, MCPIP1 (monocyte chemoattractant protein-induced protein 1), in neoplasia continuous to emerge. The ribonuclease can cleave not only inflammation-related transcripts but also some microRNAs (miRNAs) and viral RNAs. The suppressive effect of the protein has been hitherto suggested in breast cancer, clear cell renal cell carcinoma, osteosarcoma, and neuroblastoma. Our previous results have demonstrated a reduced levels of several oncogenes, as well as inhibited growth of neuroblastoma cells upon MCPIP1 overexpression. Here, we investigate the mechanisms underlying the suppression of MYCN proto-oncogene, bHLH transcription factor (MYCN)-amplified neuroblastoma cells overexpressing the MCPIP1 protein. We showed that the levels of several transcripts involved in cell cycle progression decreased in BE(2)-C and KELLY cells overexpressing MCPIP1 in a ribonucleolytic activity-dependent manner. However, RNA immunoprecipitation indicated that only AURKA mRNA (encoding for Aurora A kinase) interacts with the ribonuclease. Furthermore, the application of a luciferase assay suggested MCPIP1-dependent destabilization of the transcript. Further analyses demonstrated that the entire conserved region of AURKA seems to be indispensable for the interaction with the MCPIP1 protein. Additionally, we examined the effect of the ribonuclease overexpression on the miRNA expression profile in MYCN-amplified neuroblastoma cells. However, no significant alterations were observed. Our data indicate a key role of the binding and cleavage of the AURKA transcript in an MCPIP1-dependent suppressive effect on neuroblastoma cells.
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Affiliation(s)
- Iwona Nowak
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Elżbieta Boratyn
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Sebastian Student
- Biotechnology Centre, Silesian University of Technology, Gliwice, Poland
| | - Stephan F. Bernhart
- Bioinformatics Group, Department of Computer Science & Interdisciplinary Center for Bioinformatics, Leipzig University, Leipzig, Germany
| | - Jörg Fallmann
- Bioinformatics Group, Department of Computer Science & Interdisciplinary Center for Bioinformatics, Leipzig University, Leipzig, Germany
| | - Małgorzata Durbas
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Peter F. Stadler
- Bioinformatics Group, Department of Computer Science & Interdisciplinary Center for Bioinformatics, Leipzig University, Leipzig, Germany
| | - Hanna Rokita
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
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10
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Xiaoming A, Wenbo J, Jinyi W, Bin W, Chunyang H, Qi C, Lianbao K. Macrophage Regnase-1 Deletion Deteriorates Liver Ischemia/Reperfusion Injury Through Regulation of Macrophage Polarization. Front Physiol 2020; 11:582347. [PMID: 33192591 PMCID: PMC7658104 DOI: 10.3389/fphys.2020.582347] [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: 07/13/2020] [Accepted: 09/14/2020] [Indexed: 12/11/2022] Open
Abstract
Background Regnase-1 (MCPIP) has been identified as an anti-inflammatory agent, but little is known about its influence on liver ischemia/reperfusion (I/R) injury. Macrophages can evolve biphasic responses and differentiate into remarkable polarizations, contributing greatly to the uncontrolled inflammatory cascades during liver I/R injury. Therefore, the aim of this study was to explore whether regnase-1 participated in liver I/R via manipulating macrophage polarization. Materials and methods C57BL/6 mice were randomly divided into five groups: Sham, I/R, Clodronate, Clo + BMDM, and Clo + LV MCPIP BMDM. A liver I/R model was established, and histopathological and immunostaining examinations were performed for the liver specimens; double immunofluorescence staining was used to localize MCPIP in the liver. Primary hepatocytes were isolated to simulate a hypoxia and reoxygenation (H/R) model in vitro. Bone marrow-derived macrophages (BMDM) were extracted and subjected to lentiviral transduction to knockdown MCPIP expression. BMDM with or without MCPIP deletion were exposed to H/R supernatants, and the polarized states were measured by flow cytometry. RT-PCR analysis and Western blot were also conducted. Results Compared to those in the Sham group, liver functions and Suzuki’s scores were deteriorated in the I/R group, which were reversed in the Clodronate group. The increased expression of regnase-1 in the I/R group diminished with pretreatment of clodronate liposomes. Subsequent double immunofluorescence staining established the localization of regnase-1 in macrophages in the liver. The insulted lesions in the Clodronate group became progressively aggravated with adoptive transfer of BMDM in the Clo + BMDM group, and they were further exacerbated with the transfusion of BMDM with MCPIP knockdown in the Clo + LV MCPIP BMDM group. Gene expressions of M1 and M2 markers were detected by RT-PCR, suggesting that MCPIP knockdown tended to favor the M1 transformation. Subsequently, ex vivo flow cytometrical detection showed that, upon stimulation by H/R supernatants, LV-MCPIP BMDM posed a higher ratio of M1/M2 than BMDM. Finally, we found that MCPIP participated in macrophage M1/M2 polarization through the NF-κB, C/EBPβ, and PPARγ signaling pathways during liver I/R. Conclusion Our study confirms that regnase-1 plays a critical role in liver I/R via regulation of macrophage polarization and, thus, might offer a potential therapeutic target.
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Affiliation(s)
- Ai Xiaoming
- Liver Transplantation Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of General Surgery, BenQ Medical Center, The Affiliated BenQ Hospital of Nanjing Medical University, Nanjing, China
| | - Jia Wenbo
- Liver Transplantation Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Wang Jinyi
- Liver Transplantation Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Wu Bin
- Liver Transplantation Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Hu Chunyang
- Liver Transplantation Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Chen Qi
- Liver Transplantation Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Kong Lianbao
- Liver Transplantation Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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11
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Francisco-Velilla R, Azman EB, Martinez-Salas E. Impact of RNA-Protein Interaction Modes on Translation Control: The Versatile Multidomain Protein Gemin5. Bioessays 2019; 41:e1800241. [PMID: 30919488 DOI: 10.1002/bies.201800241] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/04/2019] [Indexed: 12/12/2022]
Abstract
The fate of cellular RNAs is largely dependent on their structural conformation, which determines the assembly of ribonucleoprotein (RNP) complexes. Consequently, RNA-binding proteins (RBPs) play a pivotal role in the lifespan of RNAs. The advent of highly sensitive in cellulo approaches for studying RNPs reveals the presence of unprecedented RNA-binding domains (RBDs). Likewise, the diversity of the RNA targets associated with a given RBP increases the code of RNA-protein interactions. Increasing evidence highlights the biological relevance of RNA conformation for recognition by specific RBPs and how this mutual interaction affects translation control. In particular, noncanonical RBDs present in proteins such as Gemin5, Roquin-1, Staufen, and eIF3 eventually determine translation of selective targets. Collectively, recent studies on RBPs interacting with RNA in a structure-dependent manner unveil new pathways for gene expression regulation, reinforcing the pivotal role of RNP complexes in genome decoding.
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Affiliation(s)
- Rosario Francisco-Velilla
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, Nicolás Cabrera 1, 28049, Madrid, Spain
| | - Embarc-Buh Azman
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, Nicolás Cabrera 1, 28049, Madrid, Spain
| | - Encarnacion Martinez-Salas
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, Nicolás Cabrera 1, 28049, Madrid, Spain
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12
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Mino T, Iwai N, Endo M, Inoue K, Akaki K, Hia F, Uehata T, Emura T, Hidaka K, Suzuki Y, Standley DM, Okada-Hatakeyama M, Ohno S, Sugiyama H, Yamashita A, Takeuchi O. Translation-dependent unwinding of stem-loops by UPF1 licenses Regnase-1 to degrade inflammatory mRNAs. Nucleic Acids Res 2019; 47:8838-8859. [PMID: 31329944 PMCID: PMC7145602 DOI: 10.1093/nar/gkz628] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/05/2019] [Accepted: 07/12/2019] [Indexed: 01/14/2023] Open
Abstract
Regnase-1-mediated mRNA decay (RMD), in which inflammatory mRNAs harboring specific stem–loop structures are degraded, is a critical part of proper immune homeostasis. Prior to initial translation, Regnase-1 associates with target stem–loops but does not carry out endoribonucleolytic cleavage. Single molecule imaging revealed that UPF1 is required to first unwind the stem–loops, thus licensing Regnase-1 to proceed with RNA degradation. Following translation, Regnase-1 physically associates with UPF1 using two distinct points of interaction: The Regnase-1 RNase domain binds to SMG1-phosphorylated residue T28 in UPF1; in addition, an intrinsically disordered segment in Regnase-1 binds to the UPF1 RecA domain, enhancing the helicase activity of UPF1. The SMG1-UPF1–Regnase-1 axis targets pioneer rounds of translation and is critical for rapid resolution of inflammation through restriction of the number of proteins translated by a given mRNA. Furthermore, small-molecule inhibition of SMG1 prevents RNA unwinding in dendritic cells, allowing post-transcriptional control of innate immune responses.
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Affiliation(s)
- Takashi Mino
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| | - Noriki Iwai
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| | - Masayuki Endo
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.,Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida-ushinomiyacho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kentaro Inoue
- Department of Computer Science and Systems Engineering, Faculty of Engineering, University of Miyazaki, Miyazaki 889-2192, Japan
| | - Kotaro Akaki
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| | - Fabian Hia
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| | - Takuya Uehata
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| | - Tomoko Emura
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Kumi Hidaka
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Yutaka Suzuki
- Laboratory of Functional Genomics, Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8562, Japan
| | - Daron M Standley
- Department of Genome Informatics, Genome Information Research Center, Research Institute for Microbial Diseases (RIMD), Osaka University, Osaka 565-0871, Japan
| | - Mariko Okada-Hatakeyama
- Laboratory for Integrated Cellular Systems, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan.,Laboratory of Cell Systems, Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Shigeo Ohno
- Department of Molecular Biology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan
| | - Hiroshi Sugiyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.,Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida-ushinomiyacho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Akio Yamashita
- Department of Molecular Biology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan
| | - Osamu Takeuchi
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
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13
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Fernandez-Albert J, Lipinski M, Lopez-Cascales MT, Rowley MJ, Martin-Gonzalez AM, Del Blanco B, Corces VG, Barco A. Immediate and deferred epigenomic signatures of in vivo neuronal activation in mouse hippocampus. Nat Neurosci 2019; 22:1718-1730. [PMID: 31501571 PMCID: PMC6875776 DOI: 10.1038/s41593-019-0476-2] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 07/23/2019] [Indexed: 11/08/2022]
Abstract
Activity-driven transcription plays an important role in many brain processes, including those underlying memory and epilepsy. Here we combine genetic tagging of nuclei and ribosomes with RNA sequencing, chromatin immunoprecipitation with sequencing, assay for transposase-accessible chromatin using sequencing and Hi-C to investigate transcriptional and chromatin changes occurring in mouse hippocampal excitatory neurons at different time points after synchronous activation during seizure and sparse activation by novel context exploration. The transcriptional burst is associated with an increase in chromatin accessibility of activity-regulated genes and enhancers, de novo binding of activity-regulated transcription factors, augmented promoter-enhancer interactions and the formation of gene loops that bring together the transcription start site and transcription termination site of induced genes and may sustain the fast reloading of RNA polymerase complexes. Some chromatin occupancy changes and interactions, particularly those driven by AP1, remain long after neuronal activation and could underlie the changes in neuronal responsiveness and circuit connectivity observed in these neuroplasticity paradigms, perhaps thereby contributing to metaplasticity in the adult brain.
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Affiliation(s)
- Jordi Fernandez-Albert
- Instituto de Neurociencias, Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas, Sant Joan d'Alacant, Alicante, Spain
| | - Michal Lipinski
- Instituto de Neurociencias, Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas, Sant Joan d'Alacant, Alicante, Spain
| | - María T Lopez-Cascales
- Instituto de Neurociencias, Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas, Sant Joan d'Alacant, Alicante, Spain
| | - M Jordan Rowley
- Department of Biology, Emory University, Atlanta, GA, USA
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, USA
| | - Ana M Martin-Gonzalez
- Instituto de Neurociencias, Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas, Sant Joan d'Alacant, Alicante, Spain
- Nencki Institute of Experimental Biology PAS, Warsaw, Poland
| | - Beatriz Del Blanco
- Instituto de Neurociencias, Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas, Sant Joan d'Alacant, Alicante, Spain
| | | | - Angel Barco
- Instituto de Neurociencias, Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas, Sant Joan d'Alacant, Alicante, Spain.
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14
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Kidoya H, Muramatsu F, Shimamura T, Jia W, Satoh T, Hayashi Y, Naito H, Kunisaki Y, Arai F, Seki M, Suzuki Y, Osawa T, Akira S, Takakura N. Regnase-1-mediated post-transcriptional regulation is essential for hematopoietic stem and progenitor cell homeostasis. Nat Commun 2019; 10:1072. [PMID: 30842549 PMCID: PMC6403248 DOI: 10.1038/s41467-019-09028-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 02/18/2019] [Indexed: 02/06/2023] Open
Abstract
The balance between self-renewal and differentiation of hematopoietic stem and progenitor cells (HSPCs) maintains hematopoietic homeostasis, failure of which can lead to hematopoietic disorder. HSPC fate is controlled by signals from the bone marrow niche resulting in alteration of the stem cell transcription network. Regnase-1, a member of the CCCH zinc finger protein family possessing RNAse activity, mediates post-transcriptional regulatory activity through degradation of target mRNAs. The precise function of Regnase-1 has been explored in inflammation-related cytokine expression but its function in hematopoiesis has not been elucidated. Here, we show that Regnase-1 regulates self-renewal of HSPCs through modulating the stability of Gata2 and Tal1 mRNA. In addition, we found that dysfunction of Regnase-1 leads to the rapid onset of abnormal hematopoiesis. Thus, our data reveal that Regnase-1-mediated post-transcriptional regulation is required for HSPC maintenance and suggest that it represents a leukemia tumor suppressor.
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Affiliation(s)
- Hiroyasu Kidoya
- Department of Signal Transduction, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Osaka, Suita,, 565-0871, Japan.
| | - Fumitaka Muramatsu
- Department of Signal Transduction, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Osaka, Suita,, 565-0871, Japan
| | - Teppei Shimamura
- Division of Systems Biology, Graduate School of Medicine, Nagoya University, 65 Tsurumai-cho, Nagoya, Showa-ku,, 466-8550, Japan
| | - Weizhen Jia
- Department of Signal Transduction, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Osaka, Suita,, 565-0871, Japan
| | - Takashi Satoh
- Department of Host Defense, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Osaka, Suita, 565-0871, Japan
| | - Yumiko Hayashi
- Department of Signal Transduction, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Osaka, Suita,, 565-0871, Japan
| | - Hisamichi Naito
- Department of Signal Transduction, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Osaka, Suita,, 565-0871, Japan
| | - Yuya Kunisaki
- Department of Stem Cell Biology and Medicine/Cancer Stem Cell Research, Kyushu University, 3-1-1 Maidashi, Fukuoka, Higashi-ku, 812-8582, Japan
| | - Fumio Arai
- Department of Stem Cell Biology and Medicine/Cancer Stem Cell Research, Kyushu University, 3-1-1 Maidashi, Fukuoka, Higashi-ku, 812-8582, Japan
| | - Masahide Seki
- Department of Medical Genome Sciences Graduate School of Frontier Sciences, The University of Tokyo, Chiba, 277-8561, Japan
| | - Yutaka Suzuki
- Department of Medical Genome Sciences Graduate School of Frontier Sciences, The University of Tokyo, Chiba, 277-8561, Japan
| | - Tsuyoshi Osawa
- Division of Integrative Nutriomics and Oncology, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Tokyo, Meguro-ku, 153-8904, Japan
| | - Shizuo Akira
- Department of Host Defense, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Osaka, Suita, 565-0871, Japan.,Laboratory of Host Defense, World Premier Institute Immunology Frontier Research Center, Osaka University, Osaka, 565-0871, Japan
| | - Nobuyuki Takakura
- Department of Signal Transduction, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Osaka, Suita,, 565-0871, Japan.
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15
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Bhat SM, Massey N, Karriker LA, Singh B, Charavaryamath C. Ethyl pyruvate reduces organic dust-induced airway inflammation by targeting HMGB1-RAGE signaling. Respir Res 2019; 20:27. [PMID: 30728013 PMCID: PMC6364446 DOI: 10.1186/s12931-019-0992-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 01/27/2019] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Animal production workers are persistently exposed to organic dust and can suffer from a variety of respiratory disease symptoms and annual decline in lung function. The role of high mobility group box-1 (HMGB1) in inflammatory airway diseases is emerging. Hence, we tested a hypothesis that organic dust exposure of airway epithelial cells induces nucleocytoplasmic translocation of HMGB1 and blocking this translocation dampens organic dust-induced lung inflammation. METHODS Rats were exposed to either ambient air or swine barn (8 h/day for either 1, 5, or 20 days) and lung tissues were processed for immunohistochemistry. Swine barn dust was collected and organic dust extract (ODE) was prepared and sterilized. Human airway epithelial cell line (BEAS-2B) was exposed to either media or organic dust extract followed by treatment with media or ethyl pyruvate (EP) or anti-HMGB1 antibody. Immunoblotting, ELISA and other assays were performed at 0 (control), 6, 24 and 48 h. Data (as mean ± SEM) was analyzed using one or two-way ANOVA followed by Bonferroni's post hoc comparison test. A p value of less than 0.05 was considered significant. RESULTS Compared to controls, barn exposed rats showed an increase in the expression of HMGB1 in the lungs. Compared to controls, ODE exposed BEAS-2B cells showed nucleocytoplasmic translocation of HMGB1, co-localization of HMGB1 and RAGE, reactive species and pro-inflammatory cytokine production. EP treatment reduced the ODE induced nucleocytoplasmic translocation of HMGB1, HMGB1 expression in the cytoplasmic fraction, GM-CSF and IL-1β production and augmented the production of TGF-β1 and IL-10. Anti-HMGB1 treatment reduced ODE-induced NF-κB p65 expression, IL-6, ROS and RNS but augmented TGF-β1 and IL-10 levels. CONCLUSIONS HMGB1-RAGE signaling is an attractive target to abrogate OD-induced lung inflammation.
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Affiliation(s)
- Sanjana Mahadev Bhat
- Department of Biomedical Sciences, 2008 Vet Med Building, Iowa State University, Ames, IA USA
| | - Nyzil Massey
- Department of Biomedical Sciences, 2008 Vet Med Building, Iowa State University, Ames, IA USA
| | - Locke A. Karriker
- Department of Veterinary Diagnostic and Production Animal Medicine, 2203 Lloyd Veterinary Medical Center, Iowa State university, Ames, IA USA
| | - Baljit Singh
- Faculty of Veterinary Medicine, 2500 University Dr. NW, University of Calgary, Calgary, T2N 1N4 Canada
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16
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Dogar AM, Pauchard-Batschulat R, Grisoni-Neupert B, Richman L, Paillusson A, Pradervand S, Hagenbüchle O, Ambrosini G, Schmid CD, Bucher P, Kühn LC. Short-lived AUF1 p42-binding mRNAs of RANKL and BCL6 have two distinct instability elements each. PLoS One 2018; 13:e0206823. [PMID: 30418981 PMCID: PMC6231638 DOI: 10.1371/journal.pone.0206823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Accepted: 10/20/2018] [Indexed: 11/19/2022] Open
Abstract
Regulation of mRNA stability by RNA-protein interactions contributes significantly to quantitative aspects of gene expression. We have identified potential mRNA targets of the AU-rich element binding protein AUF1. Myc-tagged AUF1 p42 was induced in mouse NIH/3T3 cells and RNA-protein complexes isolated using anti-myc tag antibody beads. Bound mRNAs were analyzed with Affymetrix microarrays. We have identified 508 potential target mRNAs that were at least 3-fold enriched compared to control cells without myc-AUF1. 22.3% of the enriched mRNAs had an AU-rich cluster in the ARED Organism database, against 16.3% of non-enriched control mRNAs. The enrichment towards AU-rich elements was also visible by AREScore with an average value of 5.2 in the enriched mRNAs versus 4.2 in the control group. Yet, numerous mRNAs were enriched without a high ARE score. The enrichment of tetrameric and pentameric sequences suggests a broad AUF1 p42-binding spectrum at short U-rich sequences flanked by A or G. Still, some enriched mRNAs were highly unstable, as those of TNFSF11 (known as RANKL), KLF10, HES1, CCNT2, SMAD6, and BCL6. We have mapped some of the instability determinants. HES1 mRNA appeared to have a coding region determinant. Detailed analysis of the RANKL and BCL6 3’UTR revealed for both that full instability required two elements, which are conserved in evolution. In RANKL mRNA both elements are AU-rich and separated by 30 bases, while in BCL6 mRNA one is AU-rich and 60 bases from a non AU-rich element that potentially forms a stem-loop structure.
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Affiliation(s)
- Afzal M. Dogar
- Ecole Polytechnique Fédérale de Lausanne (EPFL), SV—Sciences de la Vie, ISREC—Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland
| | - Ramona Pauchard-Batschulat
- Ecole Polytechnique Fédérale de Lausanne (EPFL), SV—Sciences de la Vie, ISREC—Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland
| | - Barbara Grisoni-Neupert
- Ecole Polytechnique Fédérale de Lausanne (EPFL), SV—Sciences de la Vie, ISREC—Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland
| | - Larry Richman
- Ecole Polytechnique Fédérale de Lausanne (EPFL), SV—Sciences de la Vie, ISREC—Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland
| | - Alexandra Paillusson
- Center for Integrative Genomics (CIG), University of Lausanne, Génopode, Lausanne, Switzerland
| | - Sylvain Pradervand
- Center for Integrative Genomics (CIG), University of Lausanne, Génopode, Lausanne, Switzerland
| | - Otto Hagenbüchle
- Ecole Polytechnique Fédérale de Lausanne (EPFL), SV—Sciences de la Vie, ISREC—Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland
- Center for Integrative Genomics (CIG), University of Lausanne, Génopode, Lausanne, Switzerland
| | - Giovanna Ambrosini
- Ecole Polytechnique Fédérale de Lausanne (EPFL), SV—Sciences de la Vie, ISREC—Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland
- Swiss Institute of Bioinformatics (SIB), Lausanne, Switzerland
| | | | - Philipp Bucher
- Ecole Polytechnique Fédérale de Lausanne (EPFL), SV—Sciences de la Vie, ISREC—Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland
- Swiss Institute of Bioinformatics (SIB), Lausanne, Switzerland
| | - Lukas C. Kühn
- Ecole Polytechnique Fédérale de Lausanne (EPFL), SV—Sciences de la Vie, ISREC—Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland
- * E-mail:
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17
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Baumjohann D, Heissmeyer V. Posttranscriptional Gene Regulation of T Follicular Helper Cells by RNA-Binding Proteins and microRNAs. Front Immunol 2018; 9:1794. [PMID: 30108596 PMCID: PMC6079247 DOI: 10.3389/fimmu.2018.01794] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 07/20/2018] [Indexed: 12/24/2022] Open
Abstract
T follicular helper (Tfh) cells are critically involved in the establishment of potent antibody responses against infectious pathogens, such as viruses and bacteria, but their dysregulation may also result in aberrant antibody responses that frequently coincide with autoimmune diseases or allergies. The fate and identity of Tfh cells is tightly controlled by gene regulation on the transcriptional and posttranscriptional level. Here, we provide deeper insights into the posttranscriptional mechanisms that regulate Tfh cell differentiation, function, and plasticity through the actions of RNA-binding proteins (RBPs) and small endogenously expressed regulatory RNAs called microRNAs (miRNAs). The Roquin family of RBPs has been shown to dampen spontaneous activation and differentiation of naïve CD4+ T cells into Tfh cells, since CD4+ T cells with Roquin mutations accumulate as Tfh cells and provide inappropriate B cell help in the production of autoantibodies. Moreover, Regnase-1, an endoribonuclease that regulates a set of targets, which strongly overlaps with that of Roquin, is crucial for the prevention of autoantibody production. Interestingly, both Roquin and Regnase-1 proteins are cleaved and inactivated after TCR stimulation by the paracaspase MALT1. miRNAs are expressed in naïve CD4+ T cells and help preventing spontaneous differentiation into effector cells. While most miRNAs are downregulated upon T cell activation, several miRNAs have been shown to regulate the fate of these cells by either promoting (e.g., miR-17-92 and miR-155) or inhibiting (e.g., miR-146a) Tfh cell differentiation. Together, these different aspects highlight a complex and dynamic regulatory network of posttranscriptional gene regulation in Tfh cells that may also be active in other T helper cell populations, including Th1, Th2, Th17, and Treg.
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Affiliation(s)
- Dirk Baumjohann
- Institute for Immunology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Vigo Heissmeyer
- Institute for Immunology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany.,Research Unit Molecular Immune Regulation, Helmholtz Zentrum München, Munich, Germany
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