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Backlund M, Stein F, Rettel M, Schwarzl T, Perez-Perri JI, Brosig A, Zhou Y, Neu-Yilik G, Hentze MW, Kulozik AE. Plasticity of nuclear and cytoplasmic stress responses of RNA-binding proteins. Nucleic Acids Res 2020; 48:4725-4740. [PMID: 32313943 PMCID: PMC7229827 DOI: 10.1093/nar/gkaa256] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 04/01/2020] [Accepted: 04/04/2020] [Indexed: 02/07/2023] Open
Abstract
Cellular stress causes multifaceted reactions to trigger adaptive responses to environmental cues at all levels of the gene expression pathway. RNA-binding proteins (RBP) are key contributors to stress-induced regulation of RNA fate and function. Here, we uncover the plasticity of the RNA interactome in stressed cells, differentiating between responses in the nucleus and in the cytoplasm. We applied enhanced RNA interactome capture (eRIC) analysis preceded by nucleo-cytoplasmic fractionation following arsenite-induced oxidative stress. The data reveal unexpectedly compartmentalized RNA interactomes and their responses to stress, including differential responses of RBPs in the nucleus versus the cytoplasm, which would have been missed by whole cell analyses.
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Affiliation(s)
- Michael Backlund
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University, Im Neuenheimer Feld 350, 69120 Heidelberg, Germany & European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
- Department of Pediatric Oncology, Hematology and Immunology, Heidelberg University, Im Neuenheimer Feld 430, 69120 Heidelberg, Germany & Hopp Children's Cancer Center, National Center for Tumor Diseases (NCT), Im Neuenheimer Feld 460, 69120 Heidelberg, Germany
- To whom correspondence should be addressed. Tel: +49 6221 564555;
| | - Frank Stein
- European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Mandy Rettel
- European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Thomas Schwarzl
- European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Joel I Perez-Perri
- European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Annika Brosig
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University, Im Neuenheimer Feld 350, 69120 Heidelberg, Germany & European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
- Department of Pediatric Oncology, Hematology and Immunology, Heidelberg University, Im Neuenheimer Feld 430, 69120 Heidelberg, Germany & Hopp Children's Cancer Center, National Center for Tumor Diseases (NCT), Im Neuenheimer Feld 460, 69120 Heidelberg, Germany
- European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
- Collaboration for joint PhD degree between EMBL and Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany
| | - Yang Zhou
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University, Im Neuenheimer Feld 350, 69120 Heidelberg, Germany & European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
- Department of Pediatric Oncology, Hematology and Immunology, Heidelberg University, Im Neuenheimer Feld 430, 69120 Heidelberg, Germany & Hopp Children's Cancer Center, National Center for Tumor Diseases (NCT), Im Neuenheimer Feld 460, 69120 Heidelberg, Germany
| | - Gabriele Neu-Yilik
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University, Im Neuenheimer Feld 350, 69120 Heidelberg, Germany & European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
- Department of Pediatric Oncology, Hematology and Immunology, Heidelberg University, Im Neuenheimer Feld 430, 69120 Heidelberg, Germany & Hopp Children's Cancer Center, National Center for Tumor Diseases (NCT), Im Neuenheimer Feld 460, 69120 Heidelberg, Germany
| | - Matthias W Hentze
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University, Im Neuenheimer Feld 350, 69120 Heidelberg, Germany & European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
- European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
- Correspondence may also be addressed to Matthias W. Hentze.
| | - Andreas E Kulozik
- Molecular Medicine Partnership Unit (MMPU), Heidelberg University, Im Neuenheimer Feld 350, 69120 Heidelberg, Germany & European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
- Department of Pediatric Oncology, Hematology and Immunology, Heidelberg University, Im Neuenheimer Feld 430, 69120 Heidelberg, Germany & Hopp Children's Cancer Center, National Center for Tumor Diseases (NCT), Im Neuenheimer Feld 460, 69120 Heidelberg, Germany
- Correspondence may also be addressed to Andreas E. Kulozik.
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van Nguyen D, Chu HC, Vidal C, Anderson J, Nguyen NN, Quynh Do NT, Tran TL, Nguyen TN, Thu Nguyen HT, Fulton RB, van Nunen S, Fernando S. Gene expression profiling in allopurinol-induced severe cutaneous adverse reactions in Vietnamese. Pharmacogenomics 2020; 21:985-994. [PMID: 32896208 DOI: 10.2217/pgs-2020-0014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Aim: To examine gene expression in different clinical phenotypes of allopurinol-induced severe cutaneous adverse reactions (SCARs). Materials & methods: Gene expression profiling was performed using microarray on 11 RNA samples (four controls, three hypersensitivity syndrome/drug rash with eosinophilia and systemic symptoms, four Stevens-Johnson syndrome/toxic epidermal necrolysis) followed by quantitative real-time PCR in a total of 11 SCARs patients and 11 controls. Results: The biological pathways which were significantly enriched in differentially expressed genes in Stevens-Johnson syndrome/toxic epidermal necrolysis compared with hypersensitivity syndrome/drug rash with eosinophilia and systemic symptoms patients included; cell surface interactions at the vascular wall, immunoregulatory interactions at the immunological synapse and MyD88 signaling pathways. Overexpression of miR146a occurred in allopurinol-tolerant HLA-B*58:01 carriers. Conclusion: Biological pathways are identified which appear to be implicated in determining clinical phenotypes in allopurinol-induced SCARs. Overexpression of miR146a is potentially important for allopurinol tolerance in HLA-B*58:01 carriers.
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Affiliation(s)
- Dinh van Nguyen
- Vinmec Healthcare System, Hanoi, 10000, Vietnam.,College of Health Science, VinUniversity, Hanoi, 10000, Vietnam.,Sydney Medical School-Northern, The University of Sydney, Sydney, 2006, Australia.,ImmunoRheumatology Laboratory, NSW Health Pathology-North, Royal North Shore Hospital, St Leonards, 2065, Australia
| | - Hieu Chi Chu
- Center of Allergology & Clinical Immunology, Bach Mai Hospital, Hanoi, 10000, Vietnam
| | - Christopher Vidal
- Sydney Medical School-Northern, The University of Sydney, Sydney, 2006, Australia
| | - Janet Anderson
- ImmunoRheumatology Laboratory, NSW Health Pathology-North, Royal North Shore Hospital, St Leonards, 2065, Australia
| | - Nguyet Nhu Nguyen
- Center of Allergology & Clinical Immunology, Bach Mai Hospital, Hanoi, 10000, Vietnam
| | - Nga Thi Quynh Do
- Department of Immunology & Molecular Biology, National Institute of Hygiene & Epidemiology, Hanoi, 100000, Vietnam
| | | | | | - Ha Thi Thu Nguyen
- Department of Allergy & Clinical Immunology, Hanoi Medical University, Hanoi, 116001, Vietnam
| | - Richard B Fulton
- ImmunoRheumatology Laboratory, NSW Health Pathology-North, Royal North Shore Hospital, St Leonards, 2065, Australia
| | - Sheryl van Nunen
- Sydney Medical School-Northern, The University of Sydney, Sydney, 2006, Australia.,Department of Clinical Immunology & Allergy, Royal North Shore Hospital, Sydney, 2065, Australia
| | - Suran Fernando
- Sydney Medical School-Northern, The University of Sydney, Sydney, 2006, Australia.,ImmunoRheumatology Laboratory, NSW Health Pathology-North, Royal North Shore Hospital, St Leonards, 2065, Australia.,Department of Clinical Immunology & Allergy, Royal North Shore Hospital, Sydney, 2065, Australia
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3
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Nánási P, Imre L, Firouzi Niaki E, Bosire R, Mocsár G, Türk-Mázló A, Ausio J, Szabó G. Doxorubicin induces large-scale and differential H2A and H2B redistribution in live cells. PLoS One 2020; 15:e0231223. [PMID: 32298286 PMCID: PMC7162453 DOI: 10.1371/journal.pone.0231223] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 03/18/2020] [Indexed: 01/10/2023] Open
Abstract
We observed prominent effects of doxorubicin (Dox), an anthracycline widely used in anti-cancer therapy, on the aggregation and intracellular distribution of both partners of the H2A-H2B dimer, with marked differences between the two histones. Histone aggregation, assessed by Laser Scanning Cytometry via the retention of the aggregates in isolated nuclei, was observed in the case of H2A. The dominant effect of the anthracycline on H2B was its massive accumulation in the cytoplasm of the Jurkat leukemia cells concomitant with its disappearance from the nuclei, detected by confocal microscopy and mass spectrometry. A similar effect of the anthracycline was observed in primary human lymphoid cells, and also in monocyte-derived dendritic cells that harbor an unusually high amount of H2B in their cytoplasm even in the absence of Dox treatment. The nucleo-cytoplasmic translocation of H2B was not affected by inhibitors of major biochemical pathways or the nuclear export inhibitor leptomycin B, but it was completely diminished by PYR-41, an inhibitor with pleiotropic effects on protein degradation pathways. Dox and PYR-41 acted synergistically according to isobologram analyses of cytotoxicity. These large-scale effects were detected already at Dox concentrations that may be reached in the typical clinical settings, therefore they can contribute both to the anti-cancer mechanism and to the side-effects of this anthracycline.
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Affiliation(s)
- Péter Nánási
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Doctoral School of Molecular Cell and Immune Biology, Debrecen, Hungary
| | - László Imre
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Doctoral School of Molecular Cell and Immune Biology, Debrecen, Hungary
| | - Erfaneh Firouzi Niaki
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Doctoral School of Molecular Cell and Immune Biology, Debrecen, Hungary
| | - Rosevalentine Bosire
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Doctoral School of Molecular Cell and Immune Biology, Debrecen, Hungary
| | - Gábor Mocsár
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Doctoral School of Molecular Cell and Immune Biology, Debrecen, Hungary
| | - Anett Türk-Mázló
- Department of Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Juan Ausio
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia, Canada
| | - Gábor Szabó
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Doctoral School of Molecular Cell and Immune Biology, Debrecen, Hungary
- * E-mail:
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Szatmary P, Huang W, Criddle D, Tepikin A, Sutton R. Biology, role and therapeutic potential of circulating histones in acute inflammatory disorders. J Cell Mol Med 2018; 22:4617-4629. [PMID: 30085397 PMCID: PMC6156248 DOI: 10.1111/jcmm.13797] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/08/2018] [Accepted: 04/05/2018] [Indexed: 02/05/2023] Open
Abstract
Histones are positively charged nuclear proteins that facilitate packaging of DNA into nucleosomes common to all eukaryotic cells. Upon cell injury or cell signalling processes, histones are released passively through cell necrosis or actively from immune cells as part of extracellular traps. Extracellular histones function as microbicidal proteins and are pro‐thrombotic, limiting spread of infection or isolating areas of injury to allow for immune cell infiltration, clearance of infection and initiation of tissue regeneration and repair. Histone toxicity, however, is not specific to microbes and contributes to tissue and end‐organ injury, which in cases of systemic inflammation may lead to organ failure and death. This review details the processes of histones release in acute inflammation, the mechanisms of histone‐related tissue toxicity and current and future strategies for therapy targeting histones in acute inflammatory diseases.
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Affiliation(s)
- Peter Szatmary
- Liverpool Pancreatitis Research Group, Royal Liverpool University Hospital and Institute of Translational Medicine, University of Liverpool, Liverpool, UK.,Department of Cellular and Molecular Physiology, University of Liverpool, Liverpool, UK
| | - Wei Huang
- Liverpool Pancreatitis Research Group, Royal Liverpool University Hospital and Institute of Translational Medicine, University of Liverpool, Liverpool, UK.,Department of Integrated Traditional Chinese and Western Medicine, Sichuan Provincial Pancreatitis Center, West China Hospital of Sichuan University, Chengdu, China
| | - David Criddle
- Department of Cellular and Molecular Physiology, University of Liverpool, Liverpool, UK
| | - Alexei Tepikin
- Department of Cellular and Molecular Physiology, University of Liverpool, Liverpool, UK
| | - Robert Sutton
- Liverpool Pancreatitis Research Group, Royal Liverpool University Hospital and Institute of Translational Medicine, University of Liverpool, Liverpool, UK
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5
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Impact of Histone H1 on the Progression of Allergic Rhinitis and Its Suppression by Neutralizing Antibody in Mice. PLoS One 2016; 11:e0153630. [PMID: 27088594 PMCID: PMC4835108 DOI: 10.1371/journal.pone.0153630] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 04/02/2016] [Indexed: 01/10/2023] Open
Abstract
Nuclear antigens are known to trigger off innate and adaptive immune responses. Recent studies have found that the complex of nucleic acids and core histones that are derived from damaged cells may regulate allergic responses. However, no fundamental study has been performed concerning the role of linker histone H1 in mast cell-mediated type I hyperreactivity. In this study, we explored the impact of histone H1 on mast cell-mediated allergic responses both in vitro and in vivo. In the course of a bona-fide experimental allergen sensitization model upon co-injection with alum adjuvant, ovalbumin (OVA), but not PBS, induced elevated levels of circulating histone H1. Intranasal challenge with histone H1 to OVA/alum- (but not PBS/alum)-sensitized mice induced significantly severer symptoms of allergic rhinitis than those in mice sensitized and challenged with OVA. A monoclonal antibody against histone H1 not only suppressed mast cell degranulation, but also ameliorated OVA-induced nasal hyperreactivity and IgE-mediated passive cutaneous anaphylaxis. Our present data suggest that nuclear histone H1 represents an alarmin-like endogenous mediator acting on mast cells, and that its blockage has a therapeutic potential for mast cell-mediated type I hyperreactivity.
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6
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Roque A, Ponte I, Suau P. Interplay between histone H1 structure and function. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2015; 1859:444-54. [PMID: 26415976 DOI: 10.1016/j.bbagrm.2015.09.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 09/21/2015] [Accepted: 09/22/2015] [Indexed: 01/10/2023]
Abstract
H1 linker histones are involved both in the maintenance of higher-order chromatin structure and in gene regulation. Histone H1 exists in multiple isoforms, is evolutionarily variable and undergoes a large variety of post-translational modifications. We review recent progress in the understanding of the folding and structure of histone H1 domains with an emphasis on the interactions with DNA. The importance of intrinsic disorder and hydrophobic interactions in the folding and function of the carboxy-terminal domain (CTD) is discussed. The induction of a molten globule-state in the CTD by macromolecular crowding is also considered. The effects of phosphorylation by cyclin-dependent kinases on the structure of the CTD, as well as on chromatin condensation and oligomerization, are described. We also address the extranuclear functions of histone H1, including the interaction with the β-amyloid peptide.
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Affiliation(s)
- Alicia Roque
- Departamento de Bioquímica y Biología Molecular, Facultad de Biociencias, Universidad Autónoma de Barcelona, Spain
| | - Inma Ponte
- Departamento de Bioquímica y Biología Molecular, Facultad de Biociencias, Universidad Autónoma de Barcelona, Spain
| | - Pedro Suau
- Departamento de Bioquímica y Biología Molecular, Facultad de Biociencias, Universidad Autónoma de Barcelona, Spain.
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7
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Induction of antinuclear antibodies by de novo autoimmune hepatitis regulates alloimmune responses in rat liver transplantation. Clin Dev Immunol 2013; 2013:413928. [PMID: 24454474 PMCID: PMC3886613 DOI: 10.1155/2013/413928] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 10/31/2013] [Accepted: 11/13/2013] [Indexed: 01/10/2023]
Abstract
Concanavalin A (Con A) is a lectin originating from the jack-bean and well known for its ability to stimulate T cells and induce autoimmune hepatitis. We previously demonstrated the induction of immunosuppressive antinuclear autoantibody in the course of Con A-induced transient autoimmune hepatitis. This study aimed to clarify the effects of Con A-induced hepatitis on liver allograft rejection and acceptance. In this study, we observed the unique phenomenon that the induction of transient de novo autoimmune hepatitis by Con A injection paradoxically overcomes the rejection without any immunosuppressive drug and exhibits significantly prolonged survival after orthotopic liver transplantation (OLT). Significantly increased titers of anti-nuclear Abs against histone H1 and high-mobility group box 1 (HMGB1) and reduced donor specific alloantibody response were observed in Con A-injected recipients. Induction of Foxp3 and IL-10 in OLT livers of Con A-injected recipients suggested the involvement of regulatory T cells in this unique phenomenon. Our present data suggest the significance of autoimmune responses against nuclear histone H1 and HMGB1 for competing allogeneic immune responses, resulting in the acceptance of liver allografts in experimental liver transplantation.
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8
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Nuclear antigens and auto/alloantibody responses: friend or foe in transplant immunology. Clin Dev Immunol 2013; 2013:267156. [PMID: 23690821 PMCID: PMC3649457 DOI: 10.1155/2013/267156] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 03/19/2013] [Indexed: 02/07/2023]
Abstract
In addition to cellular immune responses, humoral immune responses, mediated by natural antibodies, autoantibodies, and alloantibodies, have increasingly been recognized as causes of organ transplant rejection. In our previous studies, we have demonstrated the induction of antinuclear antibodies against histone H1 and high-mobility group box 1 (HMGB1), in both experimental and clinical liver transplant tolerance. The active induction of antinuclear antibodies is usually an undesirable phenomenon, but it is often observed after liver transplantation. However, the release of nuclear antigens and its suppression by neutralizing antibodies are proposed to be important in the initiation and regulation of immune responses. In this review article, we summarize the current understanding of nuclear antigens and corresponding antinuclear regulatory antibodies (Abregs) on infection, injury, inflammation, transplant rejection, and tolerance induction and discuss the significance of nuclear antigens as diagnostic and therapeutic targets.
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Hsu LW, Goto S, Nakano T, Chen KD, Wang CC, Lai CY, Hou CH, Chang YC, Cheng YF, Chiu KW, Chen CC, Chen SH, Chen CL. The effect of exogenous histone H1 on rat adipose-derived stem cell proliferation, migration, and osteogenic differentiation in vitro. J Cell Physiol 2012; 227:3417-25. [PMID: 22223405 DOI: 10.1002/jcp.24042] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Adipose-derived stem cells (ASCs) are of great interest for the development of novel cell therapies due to their ease of isolation and expansion, immunosuppressive activity, and multilineage differentiation potential. However, the mechanisms underlying the therapeutic potential of ASCs remain to be elucidated. Others and we have shown that nuclear proteins such as histone H1 and high mobility group box 1 (HMGB1) play important roles in the maturation of dendritic cells (DCs). Furthermore, we previously demonstrated translocation of histone H1 from the nucleus to the cytoplasm and activation of mitogen-activated protein kinases (MAPKs) in DCs. In the present study, we confirmed that histone H1 does not alter the immunophenotype and immunosuppression potential of ASCs, but that histone H1 enhanced wound healing and increased interleukin (IL)-6 expression. Moreover, histone H1 treated-ASCs showed up-regulation of MAPKs extracellular-regulated kinase 1/2 (ERK1/2) and sequential NF-κB translocation. Finally, we found that culture in differentiation media supplemented with histone H1 enhanced ASC osteogenesis. In contrast, inhibition of histone H1 by small interfering RNA (siRNA) reduced osteogenic differentiation markers including ALP. These results suggest that histone H1 may be useful for induction of mesenchymal stem cells in tissue engineering and future potential ASC therapies.
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Affiliation(s)
- Li-Wen Hsu
- Center for Translational Research in Biomedical Sciences, Liver Transplantation Program and Department of Surgery, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Niao-Sung, Kaohsiung, Taiwan
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10
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Abstract
The prospect of developing transport systems using histones for site-specific delivery of therapeutic agents that have poor penetration characteristics through cellular membranes and tissue barriers has been investigated. Histones immobilized on microspheres can also be used to modify surfaces intended for cell cultivation, facilitating adhesion, proliferation and network formation by interactions of cells through contacts with several microspheres. They can be applied to three-dimensional pore matrices that are designed for producing tissue-like structures in vitro.
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11
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Contente S, Yeh TJA, Friedman RM. H-ras localizes to cell nuclei and varies with the cell cycle. Genes Cancer 2011; 2:166-72. [PMID: 21779490 PMCID: PMC3111243 DOI: 10.1177/1947601911405042] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 02/18/2011] [Accepted: 03/04/2011] [Indexed: 01/10/2023] Open
Abstract
H-Ras functions as a signal switch molecule in numerous signaling pathways in the cytoplasm, requiring H-Ras localization to the inner surface of the cytoplasmic membrane, and H-Ras is considered to be a cytoplasmic protein. Immunoblot studies of cells transformed by overexpression of c-H-ras indicated that H-Ras protein was present in both cytoplasmic and nuclear extracts, suggesting a possible correlation of nuclear H-Ras and cellular transformation. Unexpectedly, additional studies revealed that H-Ras protein was also present in the nuclei of nontransformed and primary mouse cells, which do not overexpress H-Ras. Mouse fibroblast NIH 3T3 cells, L cells, and a primary fibroblast line all had H-Ras present in both cytoplasmic and nuclear extracts. Nuclear extracts of cells synchronized by growth without serum displayed an increasing amount of H-Ras and cyclin D1 as cells grew after serum addition. Treatment with farnesyltransferase inhibitor caused loss of H-Ras from the nucleus. Immunofluorescence in situ studies of nuclei from synchronized cultures showed that H-Ras protein appeared in and disappeared from the nuclei as the cells moved through the growth cycle. This cycling occurred in both nontransformed and ras-transformed cells. Flow cytometry measurements on parallel cultures revealed that the time point at which the greatest percentage of cells were in S phase, for each line, corresponded to appearance of a noticeably stronger in situ signal for H-Ras. H-Ras may participate in nuclear signaling pathways associated with replication in addition to its cytoplasmic signaling functions.
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Affiliation(s)
- Sara Contente
- Department of Pathology, F. Edward Hébert School of Medicine, and United States Military Cancer Institute, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
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12
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Chen KD, Hsu LW, Goto S, Yeh CW, Nakano T, Lai CY, Chang YC, Hou CH, Wang CC, Cheng YF, Chiu KW, Lin CC, Chen CL. Adaptor protein Shc acts as an immune-regulator for the LPS-stimulated maturation of bone marrow-derived dendritic cells. BMC Immunol 2011; 12:32. [PMID: 21612602 PMCID: PMC3123310 DOI: 10.1186/1471-2172-12-32] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Accepted: 05/25/2011] [Indexed: 01/10/2023] Open
Abstract
Background The Shc isoforms is known to mediate immune responses and has been indicated as a negative regulator of autoimmunity and lymphocyte activation. We aimed to evaluate the immune-regulatory role of Shc in rat bone marrow-derived DCs in the maturation process triggered by LPS. Results We found that, in response to LPS, expression of Shc proteins was induced and that neutralization of Shc inhibited the LPS-induced transient phosphorylation of p52Shc on pTyr239/240 in DCs of Lewis (LEW; RT1l) rats. Moreover, the significantly enhanced expression of IL-10 and the surface level of costimulatory molecule CD80, as well as suppressed expression of IL-6 and IL-12 in the Shc-silenced DCs were also observed. Similar IκB phosphorylation occurred in Shc-silenced DCs primed by LPS, indicating Shc is not associated with NF-κB pathway. We further demonstrate that Shc blockade on LPS-treated DCs results in significant increase of the overall STAT3 phosphorylation and the relative levels of phospho-STAT3 in the nuclear fraction. STAT3 activation by LPS with or without Shc blockade was totally abolished by SU6656, a selective Src family kinases inhibitor, underscoring the critical role of Src-mediated activation. Conclusions We conclude that Shc blockade in LPS-primed DC leads to the development of tolerogenic DC via Src-dependent STAT3 activation and that adaptor protein Shc might play a pivotal role in mediating immunogenic and tolerogenic properties of DCs.
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Affiliation(s)
- Kuang-Den Chen
- Center for Translational Research in Biomedical Sciences, Liver Transplantation Program, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
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13
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Verma NK, Dempsey E, Freeley M, Botting CH, Long A, Kelleher D, Volkov Y. Analysis of dynamic tyrosine phosphoproteome in LFA-1 triggered migrating T-cells. J Cell Physiol 2011; 226:1489-98. [PMID: 20945386 DOI: 10.1002/jcp.22478] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The ordered, directional migration of T-lymphocytes is a key process during immune surveillance and response. This requires cell adhesion to the high endothelial venules or to the extracellular matrix by a series of surface receptor/ligand interactions involving adhesion molecules of the integrin family including lymphocyte function associated molecule-1 (LFA-1) and intercellular adhesion molecules (ICAMs). Reversible protein phosphorylation is emerging as a key player in the regulation of biological functions with tyrosine phosphorylation playing a crucial role in signal transduction. Thus, the study of this type of post-translational modification at the proteomic level has great biological significance. In this work, phospho-enriched cell lysates from LFA-1-triggered migrating human T-cells were subjected to immunoaffinity purification of tyrosine phosphorylated proteins, mass spectrometric, and bioinformatic analysis. In addition to the identification of several well-documented proteins, the analysis suggested involvement of a number of new and novel proteins in LFA-1 induced T-cell migration. This dataset expands the list of the signaling components of the LFA-1 induced phosphotyrosine protein complexes in migrating T-cells that will be extremely useful in the study of their specific roles within LFA-1 associated signaling pathways. Identification of proteins previously not reported in the context of LFA-1 stimulated signal transduction might provide new insights into understanding the LFA-1 signaling networks and aid in the search for new potential therapeutic targets.
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Affiliation(s)
- Navin K Verma
- Department of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, Ireland.
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14
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Nakano T, Goto S, Lai CY, Hsu LW, Takaoka Y, Kawamoto S, Chiang KC, Shimada Y, Ohmori N, Goto T, Sato S, Ono K, Cheng YF, Chen CL. Immunological aspects and therapeutic significance of an autoantibody against histone H1 in a rat model of concanavalin A-induced hepatitis. Immunology 2009; 129:547-55. [PMID: 20102416 DOI: 10.1111/j.1365-2567.2009.03149.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
We previously demonstrated the immunosuppressive activity of anti-histone H1 autoantibody induced in experimental and clinical liver allograft tolerance. This study aimed to explore the immunological aspects of anti-histone H1 autoantibody in liver injury induced by concanavalin A (Con A). To establish a Con A-hepatitis model, 20 mg/kg Con A was intravenously injected into rats, after which liver function and histopathological analyses were performed. In this model, anti-histone H1 autoantibody was transiently induced in the sera during the natural recovery stage, 3-7 days after Con A injection. To evaluate the therapeutic significance of anti-histone H1 autoantibody, a polyclonal antibody against histone H1 was intraperitoneally injected immediately after Con A injection. We found that injection of anti-histone H1 antibody could reduce Con A-induced liver damage. Further mechanical analyses revealed that anti-histone H1 antibody altered the intracellular activation of mitogen-activated protein kinase, nuclear factor-kappaB and calcineurin via T-cell receptor signalling, suggesting that anti-histone H1 antibody may protect the liver from Con A-induced injury by inhibiting activation of effector T cells. These findings suggest that anti-histone H1 autoantibody may be a natural immune regulatory factor that protects inflamed livers suffering from autoimmune hepatitis and may lead to T-cell unresponsiveness through the selective regulation of mitogen-activated protein kinase/nuclear factor-kappaB and calcineurin signalling.
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Affiliation(s)
- Toshiaki Nakano
- Liver Transplantation Program and Department of Surgery, Chang Gung Memorial Hospital-Kaohsiung Medical Centre, Chang Gung University College of Medicine, Niao-Sung, Kaohsiung, Taiwan.
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Nakano T, Goto S, Lai CY, Hsu LW, Wong JL, Kawamoto S, Chiang KC, Ohmori N, Goto T, Sato S, Yang CH, Wang CC, Jawan B, Cheng YF, Ono K, Chen CL. Involvement of autoimmunity against nuclear histone H1 in liver transplantation tolerance. Transpl Immunol 2008; 19:87-92. [PMID: 18503883 DOI: 10.1016/j.trim.2008.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2008] [Accepted: 04/04/2008] [Indexed: 01/10/2023]
Abstract
BACKGROUND Our recent studies suggested that anti-histone H1 autoantibody (auto-Ab) plays an important role in experimental and clinical liver allograft tolerance as a natural immunosuppressive factor. The present study aimed to explore how the autoimmune response against histone H1 is involved in tolerance induction. METHODS The measurement of anti-histone H1 auto-Ab and immunohistochemical analysis were performed in serum and liver allografts after orthotopic liver transplantation (OLT). To compare the auto-Ab response against histone H1 between the recipients of rejector (DA-LEW) and tolerogenic (DA-PVG) OLT models, naïve recipients were immunized with calf thymus histone H1. The immunosuppressive state of histone H1-immunized rats was assayed by mixed lymphocyte reaction (MLR). RESULTS Anti-histone H1 Ab titer was transiently increased during the rejection phase after OLT (days 7-21) in the DA-PVG combination, while no such response was confirmed in the DA-LEW acute rejection model. Nuclear histone H1 antigens were found in the cytoplasm and the extracellular environment in liver allografts at the rejection phase in the tolerogenic model but not in the rejector model, resulting from the transient induction of anti-histone H1 auto-Ab in recipient PVG rats after OLT. Low dose and short-term immunization with histone H1 upregulated the anti-histone H1 Ab titer in naïve PVG rats, which exhibited a low allogeneic immune response, while no such response was found in naïve LEW rats. CONCLUSIONS These results suggest that the sensitivity to nuclear antigens such as histone H1 may be a key factor determining the acceptance or rejection of donor liver grafts, at least in DA-PVG and DA-LEW combinations.
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Affiliation(s)
- Toshiaki Nakano
- Department of Surgery, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan.
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