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Rentsendorj A, Raedschelders K, Fuchs DT, Sheyn J, Vaibhav V, Porritt RA, Shi H, Dagvadorj J, de Freitas Germano J, Koronyo Y, Arditi M, Black KL, Gaire BP, Van Eyk JE, Koronyo-Hamaoui M. Osteopontin depletion in macrophages perturbs proteostasis via regulating UCHL1-UPS axis and mitochondria-mediated apoptosis. Front Immunol 2023; 14:1155935. [PMID: 37325640 PMCID: PMC10266348 DOI: 10.3389/fimmu.2023.1155935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 05/19/2023] [Indexed: 06/17/2023] Open
Abstract
Introduction Osteopontin (OPN; also known as SPP1), an immunomodulatory cytokine highly expressed in bone marrow-derived macrophages (BMMΦ), is known to regulate diverse cellular and molecular immune responses. We previously revealed that glatiramer acetate (GA) stimulation of BMMΦ upregulates OPN expression, promoting an anti-inflammatory, pro-healing phenotype, whereas OPN inhibition triggers a pro-inflammatory phenotype. However, the precise role of OPN in macrophage activation state is unknown. Methods Here, we applied global proteome profiling via mass spectrometry (MS) analysis to gain a mechanistic understanding of OPN suppression versus induction in primary macrophage cultures. We analyzed protein networks and immune-related functional pathways in BMMΦ either with OPN knockout (OPNKO) or GA-mediated OPN induction compared with wild type (WT) macrophages. The most significant differentially expressed proteins (DEPs) were validated using immunocytochemistry, western blot, and immunoprecipitation assays. Results and discussion We identified 631 DEPs in OPNKO or GA-stimulated macrophages as compared to WT macrophages. The two topmost downregulated DEPs in OPNKO macrophages were ubiquitin C-terminal hydrolase L1 (UCHL1), a crucial component of the ubiquitin-proteasome system (UPS), and the anti-inflammatory Heme oxygenase 1 (HMOX-1), whereas GA stimulation upregulated their expression. We found that UCHL1, previously described as a neuron-specific protein, is expressed by BMMΦ and its regulation in macrophages was OPN-dependent. Moreover, UCHL1 interacted with OPN in a protein complex. The effects of GA activation on inducing UCHL1 and anti-inflammatory macrophage profiles were mediated by OPN. Functional pathway analyses revealed two inversely regulated pathways in OPN-deficient macrophages: activated oxidative stress and lysosome-mitochondria-mediated apoptosis (e.g., ROS, Lamp1-2, ATP-synthase subunits, cathepsins, and cytochrome C and B subunits) and inhibited translation and proteolytic pathways (e.g., 60S and 40S ribosomal subunits and UPS proteins). In agreement with the proteome-bioinformatics data, western blot and immunocytochemical analyses revealed that OPN deficiency perturbs protein homeostasis in macrophages-inhibiting translation and protein turnover and inducing apoptosis-whereas OPN induction by GA restores cellular proteostasis. Taken together, OPN is essential for macrophage homeostatic balance via the regulation of protein synthesis, UCHL1-UPS axis, and mitochondria-mediated apoptotic processes, indicating its potential application in immune-based therapies.
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Affiliation(s)
- Altan Rentsendorj
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Koen Raedschelders
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Dieu-Trang Fuchs
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Julia Sheyn
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Vineet Vaibhav
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Rebecca A. Porritt
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Haoshen Shi
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | | | | | - Yosef Koronyo
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Moshe Arditi
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Keith L. Black
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Bhakta Prasad Gaire
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Jennifer E. Van Eyk
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Maya Koronyo-Hamaoui
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Department of Neurology, Cedars-Sinai Medical Center, Los Angeles, CA, United States
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2
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Tumurkhuu G, Casanova NG, Kempf CL, Ercan Laguna D, Camp SM, Dagvadorj J, Song JH, Reyes Hernon V, Travelli C, Montano EN, Yu JM, Ishimori M, Wallace DJ, Sammani S, Jefferies C, Garcia JG. eNAMPT/TLR4 inflammatory cascade activation is a key contributor to SLE Lung vasculitis and alveolar hemorrhage. J Transl Autoimmun 2022; 6:100181. [PMID: 36619655 PMCID: PMC9816774 DOI: 10.1016/j.jtauto.2022.100181] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022] Open
Abstract
Rationale Effective therapies to reduce the severity and high mortality of pulmonary vasculitis and diffuse alveolar hemorrhage (DAH) in patients with systemic lupus erythematosus (SLE) is a serious unmet need. We explored whether biologic neutralization of eNAMPT (extracellular nicotinamide phosphoribosyl-transferase), a novel DAMP and Toll-like receptor 4 ligand, represents a viable therapeutic strategy in lupus vasculitis. Methods Serum was collected from SLE subjects (n = 37) for eNAMPT protein measurements. In the preclinical pristane-induced murine model of lung vasculitis/hemorrhage, C57BL/6 J mice (n = 5-10/group) were treated with PBS, IgG (1 mg/kg), or the eNAMPT-neutralizing ALT-100 mAb (1 mg/kg, IP or subcutaneously (SQ). Lung injury evaluation (Day 10) included histology/immuno-histochemistry, BAL protein/cellularity, tissue biochemistry, RNA sequencing, and plasma biomarker assessment. Results SLE subjects showed highly significant increases in blood NAMPT mRNA expression and eNAMPT protein levels compared to healthy controls. Preclinical pristane-exposed mice studies showed significantly increased NAMPT lung tissue expression and increased plasma eNAMPT levels accompanied by marked increases in alveolar hemorrhage and lung inflammation (BAL protein, PMNs, activated monocytes). In contrast, ALT-100 mAb-treated mice showed significant attenuation of inflammatory lung injury, alveolar hemorrhage, BAL protein, tissue leukocytes, and plasma inflammatory cytokines (eNAMPT, IL-6, IL-8). Lung RNA sequencing showed pristane-induced activation of inflammatory genes/pathways including NFkB, cytokine/chemokine, IL-1β, and MMP signaling pathways, each rectified in ALT-100 mAb-treated mice. Conclusions These findings highlight the role of eNAMPT/TLR4-mediated inflammatory signaling in the pathobiology of SLE pulmonary vasculitis and alveolar hemorrhage. Biologic neutralization of this novel DAMP appears to serve as a viable strategy to reduce the severity of SLE lung vasculitis.
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Affiliation(s)
- Gantsetseg Tumurkhuu
- Department of Medicine, Division of Rheumatology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Nancy G. Casanova
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, USA
| | - Carrie L. Kempf
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, USA
| | - Duygu Ercan Laguna
- Department of Medicine, Division of Rheumatology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Sara M. Camp
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, USA
| | | | - Jin H. Song
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, USA
| | - Vivian Reyes Hernon
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, USA
| | | | - Erica N. Montano
- Department of Medicine, Division of Rheumatology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Jeong Min Yu
- Department of Medicine, Division of Rheumatology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Mariko Ishimori
- Department of Medicine, Division of Rheumatology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, USA
| | - Daniel J. Wallace
- Department of Medicine, Division of Rheumatology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, USA
| | - Saad Sammani
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, USA
| | - Caroline Jefferies
- Department of Medicine, Division of Rheumatology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Joe G.N. Garcia
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, USA
- Corresponding author. University of Arizona Health Sciences, USA.
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3
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Rentsendorj A, Raedschelders K, Vaibhav V, Porritt RA, Fuchs D, Sheyn J, Shi H, Dagvadorj J, Koronyo Y, Arditi M, Black KL, Van Eyk JE, Koronyo‐Hamaoui M. Proteomics profiling reveals Spp1 deficiency to downregulate UCHL1 in macrophages and to associate with lysosome‐mitochondria mediated apoptotic pathways. Alzheimers Dement 2021. [DOI: 10.1002/alz.055297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Altan Rentsendorj
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars‐Sinai Medical Center Los Angeles CA USA
| | | | - Vineet Vaibhav
- Heart Institute, Cedars‐Sinai Medical Center Los Angeles CA USA
| | - Rebecca A Porritt
- Department of Pediatrics, Cedars‐Sinai Medical Center Los Angeles CA USA
| | - Dieu‐Trang Fuchs
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars‐Sinai Medical Center Los Angeles CA USA
| | - Julia Sheyn
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars‐Sinai Medical Center Los Angeles CA USA
| | - Haoshen Shi
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars‐Sinai Medical Center Los Angeles CA USA
| | | | - Yosef Koronyo
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars‐Sinai Medical Center Los Angeles CA USA
| | - Moshe Arditi
- Department of Pediatrics, Cedars‐Sinai Medical Center Los Angeles CA USA
| | - Keith L Black
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars‐Sinai Medical Center Los Angeles CA USA
| | - Jennifer E Van Eyk
- Department of Biomedical Sciences, Cedars‐Sinai Medical Center Los Angeles CA USA
| | - Maya Koronyo‐Hamaoui
- Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars‐Sinai Medical Center Los Angeles CA USA
- Department of Biomedical Sciences, Cedars‐Sinai Medical Center Los Angeles CA USA
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4
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Dagvadorj J, Mikulska-Ruminska K, Tumurkhuu G, Ratsimandresy RA, Carriere J, Andres AM, Marek-Iannucci S, Song Y, Chen S, Lane M, Dorfleutner A, Gottlieb RA, Stehlik C, Cassel S, Sutterwala FS, Bahar I, Crother TR, Arditi M. Recruitment of pro-IL-1α to mitochondrial cardiolipin, via shared LC3 binding domain, inhibits mitophagy and drives maximal NLRP3 activation. Proc Natl Acad Sci U S A 2021; 118:e2015632118. [PMID: 33361152 PMCID: PMC7817159 DOI: 10.1073/pnas.2015632118] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The balance between NLRP3 inflammasome activation and mitophagy is essential for homeostasis and cellular health, but this relationship remains poorly understood. Here we found that interleukin-1α (IL-1α)-deficient macrophages have reduced caspase-1 activity and diminished IL-1β release, concurrent with reduced mitochondrial damage, suggesting a role for IL-1α in regulating this balance. LPS priming of macrophages induced pro-IL-1α translocation to mitochondria, where it directly interacted with mitochondrial cardiolipin (CL). Computational modeling revealed a likely CL binding motif in pro-IL-1α, similar to that found in LC3b. Thus, binding of pro-IL-1α to CL in activated macrophages may interrupt CL-LC3b-dependent mitophagy, leading to enhanced Nlrp3 inflammasome activation and more robust IL-1β production. Mutation of pro-IL-1α residues predicted to be involved in CL binding resulted in reduced pro-IL-1α-CL interaction, a reduction in NLRP3 inflammasome activity, and increased mitophagy. These data identify a function for pro-IL-1α in regulating mitophagy and the potency of NLRP3 inflammasome activation.
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Affiliation(s)
- Jargalsaikhan Dagvadorj
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Karolina Mikulska-Ruminska
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, PA 15213
- Institute of Physics, Faculty of Physics Astronomy and Informatics, Nicolaus Copernicus University in Toruń, 87-100 Torun, Poland
| | - Gantsetseg Tumurkhuu
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | | | - Jessica Carriere
- Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Allen M Andres
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Stefanie Marek-Iannucci
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Yang Song
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Shuang Chen
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics. David Geffen School of Medicine at University of California, Los Angeles, CA 90095
| | - Malcolm Lane
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Andrea Dorfleutner
- Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Roberta A Gottlieb
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Christian Stehlik
- Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Suzanne Cassel
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Lung Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Fayyaz S Sutterwala
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Lung Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Ivet Bahar
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, PA 15213;
| | - Timothy R Crother
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048;
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics. David Geffen School of Medicine at University of California, Los Angeles, CA 90095
| | - Moshe Arditi
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048;
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics. David Geffen School of Medicine at University of California, Los Angeles, CA 90095
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5
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Hornick EE, Dagvadorj J, Zacharias ZR, Miller AM, Langlois RA, Chen P, Legge KL, Bishop GA, Sutterwala FS, Cassel SL. Dendritic cell NLRC4 regulates influenza A virus-specific CD4 T cell responses through FasL expression. J Clin Invest 2019; 129:2888-2897. [PMID: 31038471 DOI: 10.1172/jci124937] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Influenza A virus (IAV)-specific T cell responses are important correlates of protection during primary and subsequent infections. Generation and maintenance of robust IAV-specific T cell responses relies on T cell interactions with dendritic cells (DCs). In this study, we explore the role of nucleotide-binding domain leucine-rich repeat containing receptor family member NLRC4 in modulating the DC phenotype during IAV infection. Nlrc4-/- mice had worsened survival and increased viral titers during infection, normal innate immune cell recruitment and IAV-specific CD8 T cell responses, but severely blunted IAV-specific CD4 T cell responses compared to wild-type mice. The defect in the pulmonary IAV-specific CD4 T cell response was not a result of defective priming or migration of these cells in Nlrc4-/- mice but was instead due to an increase in FasL+ DCs, resulting in IAV-specific CD4 T cell death. Together, our data support a novel role for NLRC4 in regulating the phenotype of lung DCs during a respiratory viral infection, and thereby influencing the magnitude of protective T cell responses.
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Affiliation(s)
- Emma E Hornick
- Interdisciplinary Program in Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | - Jargalsaikhan Dagvadorj
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA.,Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Zeb R Zacharias
- Interdisciplinary Program in Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA.,Department of Pathology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | - Ann M Miller
- Department of Surgery, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | - Ryan A Langlois
- Center for Immunology, University of Minnesota, Minneapolis, Minnesota, USA
| | - Peter Chen
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA.,Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Kevin L Legge
- Interdisciplinary Program in Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA.,Department of Pathology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA.,Department of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | - Gail A Bishop
- Interdisciplinary Program in Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA.,Department of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA.,Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA.,Veterans Affairs Medical Center, Iowa City, Iowa, USA
| | - Fayyaz S Sutterwala
- Interdisciplinary Program in Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA.,Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA.,Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Suzanne L Cassel
- Interdisciplinary Program in Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA.,Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA.,Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
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6
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Crother TR, Porritt RA, Dagvadorj J, Tumurkhuu G, Slepenkin AV, Peterson EM, Chen S, Shimada K, Arditi M. Autophagy Limits Inflammasome During Chlamydia pneumoniae Infection. Front Immunol 2019; 10:754. [PMID: 31031755 PMCID: PMC6473188 DOI: 10.3389/fimmu.2019.00754] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 03/21/2019] [Indexed: 12/23/2022] Open
Abstract
Autophagy can either antagonize or promote intracellular bacterial growth, depending on the pathogen. Here, we investigated the role of autophagy during a pulmonary infection with the obligate intracellular pathogen, Chlamydia pneumoniae (CP). In mouse embryonic fibroblasts (MEFs) or macrophages, deficiency of autophagy pathway components led to enhanced CP replication, suggesting that autophagy exerts a bactericidal role. However, in vivo, mice with myeloid-specific deletion of the autophagic protein ATG16L1 suffered increased mortality during CP infection, neutrophilia, and increased inflammasome activation despite no change in bacterial burden. Induction of autophagy led to reduced CP replication in vitro, but impaired survival in CP-infected mice, associated with an initial reduction in IL-1β production, followed by enhanced neutrophil recruitment, defective CP clearance, and later inflammasome activation and IL-1β production, which drove the resulting mortality. Taken together, our data suggest that a delicate interplay exists between autophagy and inflammasome activation in determining the outcome of CP infection, perturbation of which can result in inflammatory pathology or unrestricted bacterial growth.
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Affiliation(s)
- Timothy R Crother
- Division of Pediatric Infectious Diseases and Immunology, Department of Pediatrics, and Infectious and Immunological Diseases Research Center, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States.,Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States
| | - Rebecca A Porritt
- Division of Pediatric Infectious Diseases and Immunology, Department of Pediatrics, and Infectious and Immunological Diseases Research Center, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Jargalsaikhan Dagvadorj
- Division of Pediatric Infectious Diseases and Immunology, Department of Pediatrics, and Infectious and Immunological Diseases Research Center, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Gantsetseg Tumurkhuu
- Division of Pediatric Infectious Diseases and Immunology, Department of Pediatrics, and Infectious and Immunological Diseases Research Center, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Anatoly V Slepenkin
- Department of Microbiology and Molecular Genetics, University of California, Irvine, Irvine, CA, United States
| | - Ellena M Peterson
- Department of Pathology, University of California, Irvine, Irvine, CA, United States
| | - Shuang Chen
- Division of Pediatric Infectious Diseases and Immunology, Department of Pediatrics, and Infectious and Immunological Diseases Research Center, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States.,Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States
| | - Kenichi Shimada
- Division of Pediatric Infectious Diseases and Immunology, Department of Pediatrics, and Infectious and Immunological Diseases Research Center, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States.,Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States
| | - Moshe Arditi
- Division of Pediatric Infectious Diseases and Immunology, Department of Pediatrics, and Infectious and Immunological Diseases Research Center, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States.,Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States
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7
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Tumurkhuu G, Dagvadorj J, Porritt RA, Crother TR, Shimada K, Tarling EJ, Erbay E, Arditi M, Chen S. Chlamydia pneumoniae Hijacks a Host Autoregulatory IL-1β Loop to Drive Foam Cell Formation and Accelerate Atherosclerosis. Cell Metab 2018; 28:432-448.e4. [PMID: 29937375 PMCID: PMC6125162 DOI: 10.1016/j.cmet.2018.05.027] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 01/02/2018] [Accepted: 05/29/2018] [Indexed: 01/07/2023]
Abstract
Pathogen burden accelerates atherosclerosis, but the mechanisms remain unresolved. Activation of the NLRP3 inflammasome is linked to atherogenesis. Here we investigated whether Chlamydia pneumoniae (C.pn) infection engages NLRP3 in promoting atherosclerosis. C.pn potentiated hyperlipidemia-induced inflammasome activity in cultured macrophages and in foam cells in atherosclerotic lesions of Ldlr-/- mice. C.pn-induced acceleration of atherosclerosis was significantly dependent on NLRP3 and caspase-1. We discovered that C.pn-induced extracellular IL-1β triggers a negative feedback loop to inhibit GPR109a and ABCA1 expression and cholesterol efflux, leading to accumulation of intracellular cholesterol and foam cell formation. Gpr109a and Abca1 were both upregulated in plaque lesions in Nlrp3-/- mice in both hyperlipidemic and C.pn infection models. Mature IL-1β and cholesterol may compete for access to the ABCA1 transporter to be exported from macrophages. C.pn exploits this metabolic-immune crosstalk, which can be modulated by NLRP3 inhibitors to alleviate atherosclerosis.
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Affiliation(s)
- Gantsetseg Tumurkhuu
- Departments of Pediatrics and Medicine, Division of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Research Center (IIDRC), Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Jargalsaikhan Dagvadorj
- Departments of Pediatrics and Medicine, Division of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Research Center (IIDRC), Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Rebecca A Porritt
- Departments of Pediatrics and Medicine, Division of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Research Center (IIDRC), Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Timothy R Crother
- Departments of Pediatrics and Medicine, Division of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Research Center (IIDRC), Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA; David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Kenichi Shimada
- Departments of Pediatrics and Medicine, Division of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Research Center (IIDRC), Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA; David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Elizabeth J Tarling
- Department of Medicine, Division of Cardiology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Ebru Erbay
- Department of Molecular Biology and Genetics and National Nanotechnology Center, Bilkent University, Ankara, Turkey
| | - Moshe Arditi
- Departments of Pediatrics and Medicine, Division of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Research Center (IIDRC), Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA; David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA.
| | - Shuang Chen
- Departments of Pediatrics and Medicine, Division of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Research Center (IIDRC), Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA; David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
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8
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Noval Rivas M, Lee Y, Wakita D, Chiba N, Dagvadorj J, Shimada K, Chen S, Fishbein MC, Lehman TJA, Crother TR, Arditi M. CD8+ T Cells Contribute to the Development of Coronary Arteritis in the Lactobacillus casei Cell Wall Extract-Induced Murine Model of Kawasaki Disease. Arthritis Rheumatol 2017; 69:410-421. [PMID: 27696768 DOI: 10.1002/art.39939] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 09/15/2016] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Kawasaki disease (KD) is the leading cause of acquired heart disease among children in developed countries. Coronary lesions in KD in humans are characterized by an increased presence of infiltrating CD3+ T cells; however, the specific contributions of the different T cell subpopulations in coronary arteritis development remain unknown. Therefore, we sought to investigate the function of CD4+ and CD8+ T cells, Treg cells, and natural killer (NK) T cells in the pathogenesis of KD. METHODS We addressed the function of T cell subsets in KD development by using a well-established murine model of Lactobacillus casei cell wall extract (LCWE)-induced KD vasculitis. We determined which T cell subsets were required for development of KD vasculitis by using several knockout murine strains and depleting monoclonal antibodies. RESULTS LCWE-injected mice developed coronary lesions characterized by the presence of inflammatory cell infiltrates. Frequently, this chronic inflammation resulted in complete occlusion of the coronary arteries due to luminal myofibroblast proliferation (LMP) as well as the development of coronary arteritis and aortitis. We found that CD8+ T cells, but not CD4+ T cells, NK T cells, or Treg cells, were required for development of KD vasculitis. CONCLUSION The LCWE-induced murine model of KD vasculitis mimics many histologic features of the disease in humans, such as the presence of CD8+ T cells and LMP in coronary artery lesions as well as epicardial coronary arteritis. Moreover, CD8+ T cells functionally contribute to the development of KD vasculitis in this murine model. Therapeutic strategies targeting infiltrating CD8+ T cells might be useful in the management of KD in humans.
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Affiliation(s)
| | - Youngho Lee
- Cedars-Sinai Medical Center, Los Angeles, California
| | - Daiko Wakita
- Cedars-Sinai Medical Center, Los Angeles, California
| | - Norika Chiba
- Cedars-Sinai Medical Center, Los Angeles, California
| | | | | | - Shuang Chen
- Cedars-Sinai Medical Center, Los Angeles, California
| | | | - Thomas J A Lehman
- Hospital for Special Surgery and Weill Medical College of Cornell University, New York, New York
| | | | - Moshe Arditi
- Cedars-Sinai Medical Center and University of California, Los Angeles
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9
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Tumurkhuu G, Dagvadorj J, Zhang W, Crother T, Shimada K, Arditi M, Chen S. Abstract 431: Nlrp3 Inflammasome Inhibits Cholesterol Efflux in Macrophages by Downregulating Gpr109a Expression. A Novel Proatherogenic Mechanism. Arterioscler Thromb Vasc Biol 2017. [DOI: 10.1161/atvb.37.suppl_1.431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Recent studies suggest that Nlrp3 inflammasome activation plays a critical role in the development of atherosclerosis and
Chlamydia pneumoniae (Cpn
) infection has been shown to accelerate atherogenesis. Herein, we asked whether Cpn infection induced acceleration is via Nlrp3 inflammasome activation in hypercholestrolemia mouse model.
Nlrp3
-/-
Ldlr
-/-
,
Casp1
-/-
Ldlr
-/-
and
Ldlr
-/-
mice were infected intranasally with
Cpn
followed by western diet (WD) for 16 weeks.
Ldlr
-/-
mice
infected with Cpn
infection had markedly increased lesion size in the aortic sinus and aorta
en face
compared to WD only group. Casp1 activation in lesion macrophages in
Ldlr
-/-
mice was also increased in
Cpn
group
vs
controls.
Nlrp3
-/-
Ldlr
-/-
or
Casp1
-/-
Ldlr
-/-
mice with and without
Cpn
resulted in significantly smaller of plaques in aortic root and aorta compare to
Ldlr
-/-
mice. However, no difference was observed between
Cpn
infected and uninfected groups in the double knockout animals. Furthermore, foam cell formation of
Nlrp3
-/-
,
and
Casp1
-/-
peritoneal macrophages after treatment with OxLDL and
Cpn
was significantly reduced when compared with WT cells. Interestingly, expression levels of the cholesterol efflux transporter, ATP-binding cassette A1 (ABCA1), was increased by RT PCR and western analysis in the KO macrophages. Further investigations found that the niacin receptor Gpr109a, a known positive regulator of ABCA1, was upregulated in Nlrp3 KO macrophages during foam cell formation. Hydroxy-butyrate, an activating ligand of GPR109, was produced by macrophages after
Cpn
infection indicating a feedback loop. Intact IL-1 signaling suppressed Gpr109a expression suggesting a pathway by which the inflammasome and IL-1β could enhance foam cell formation. In aortic root lesions, macrophage expression of Gpr109a was increased in
Nlrp3
-/-
Ldlr
- -
mice compare with
Ldlr
-/-
mice on WD and infected with
Cpn
. In conclusion, the activation of the NLRP3 inflammasome negatively regulate Gpr109a receptor and its downstream cholesterol efflux transporter ABCA1, which leads to more foam cell formation and acceleration of atherosclerosis in
Ldlr
-/-
mice.
This work was supported by the National Institutes of Health grant HL111483 (to S. Chen)
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Affiliation(s)
- Gantsetseg Tumurkhuu
- Cedars Sinai Med Cntr, Depts of Pediatrics and Medicine, Div of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Rsch Cntr (IIDRC), Los Angeles, CA
| | - Jargalsaikhan Dagvadorj
- Cedars Sinai Med Cntr, Depts of Pediatrics and Medicine, Div of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Rsch Cntr (IIDRC), Los Angeles, CA
| | - Wenxuan Zhang
- Cedars Sinai Med Cntr, Depts of Pediatrics and Medicine, Div of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Rsch Cntr (IIDRC), Los Angeles, CA
| | - Timothy Crother
- Cedars Sinai Med Cntr, Depts of Pediatrics and Medicine, Div of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Rsch Cntr (IIDRC), Los Angeles, CA
| | - Kenichi Shimada
- Cedars Sinai Med Cntr, Depts of Pediatrics and Medicine, Div of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Rsch Cntr (IIDRC), Los Angeles, CA
| | - Moshe Arditi
- Cedars Sinai Med Cntr, Depts of Pediatrics and Medicine, Div of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Rsch Cntr (IIDRC), Los Angeles, CA
| | - Shuang Chen
- Cedars Sinai Med Cntr, Depts of Pediatrics and Medicine, Div of Infectious Diseases and Immunology, and Infectious and Immunologic Diseases Rsch Cntr (IIDRC), Los Angeles, CA
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10
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Koide N, Mu MM, Hassan F, Islam S, Tumurkhuu G, Dagvadorj J, Naiki Y, Mori I, Yoshida T, Yokochi T. Lipopolysaccharide enhances interferon-γ-induced nitric oxide (NO) production in murine vascular endothelial cells via augmentation of interferon regulatory factor-1 activation. ACTA ACUST UNITED AC 2016; 13:167-75. [PMID: 17621559 DOI: 10.1177/0968051907080894] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lipopolysaccharide (LPS) enhances the production of nitric oxide (NO) in interferon (IFN)-γstimulated vascular endothelial cells. We studied the mechanism by which LPS enhances IFN-γ-induced NO production by using the murine vascular endothelial cell line, END-D. LPS enhanced IFN-γinduced NO production via augmented expression of inducible type NO synthase (iNOS) mRNA. LPS significantly augmented the activation of interferon regulatory factor (IRF)-1 in IFN-γ-stimulated END-D cells, although it did not affect the activation of either MyD88-dependent nuclear factor (NF)-κB or MyD88-independent IRF-3. SB203580, an inhibitor of p38 mitogen-activated protein kinase (MAPK), prevented the nuclear translocation of IRF-1 in LPS and IFN-γ-stimulated END-D cells, and inhibited the iNOS expression and NO production in those cells. Therefore, it is proposed that LPS enhanced NO production in IFN-γ-stimulated END-D cells via augmenting p38 MAPKmediated IRF-1 activation.
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Affiliation(s)
- Naoki Koide
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan.
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11
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Tumurkhuu G, Shimada K, Dagvadorj J, Crother TR, Zhang W, Luthringer D, Gottlieb RA, Chen S, Arditi M. Ogg1-Dependent DNA Repair Regulates NLRP3 Inflammasome and Prevents Atherosclerosis. Circ Res 2016; 119:e76-90. [PMID: 27384322 DOI: 10.1161/circresaha.116.308362] [Citation(s) in RCA: 123] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 07/06/2016] [Indexed: 12/20/2022]
Abstract
RATIONALE Activation of NLRP3 (nucleotide-binding domain and leucine-rich repeat pyrin domain containing 3) inflammasome-mediating interleukin (IL)-1β secretion has emerged as an important component of inflammatory processes in atherosclerosis. Mitochondrial DNA (mtDNA) damage is detrimental in atherosclerosis, and mitochondria are central regulators of the nucleotide-binding domain and leucine-rich repeat pyrin domain containing 3 inflammasome. Human atherosclerotic plaques express increased mtDNA damage. The major DNA glycosylase, 8-oxoguanine glycosylase (OGG1), is responsible for removing the most abundant form of oxidative DNA damage. OBJECTIVE To test the role of OGG1 in the development of atherosclerosis in mouse. METHODS AND RESULTS We observed that Ogg1 expression decreases over time in atherosclerotic lesion macrophages of low-density lipoprotein receptor (Ldlr) knockout mice fed a Western diet. Ogg1(-/-)Ldlr(-/-) mice fed a Western diet resulted in an increase in plaque size and lipid content. We found increased oxidized mtDNA, inflammasome activation, and apoptosis in atherosclerotic lesions and also higher serum IL-1β and IL-18 in Ogg1(-/-)Ldlr(-/-) mice than in Ldlr(-/-). Transplantation with Ogg1(-/-) bone marrow into Ldlr(-/-) mice led to larger atherosclerotic lesions and increased IL-1β production. However, transplantation of Ogg1(-/-)Nlrp3(-/-) bone marrow reversed the Ogg1(-/-) phenotype of increased plaque size. Ogg1(-/-) macrophages showed increased oxidized mtDNA and had greater amounts of cytosolic mtDNA and cytochrome c, increased apoptosis, and more IL-1β secretion. Finally, we found that proatherogenic miR-33 can directly inhibit human OGG1 expression and indirectly suppress both mouse and human OGG1 via AMP-activated protein kinase. CONCLUSIONS OGG1 plays a protective role in atherogenesis by preventing excessive inflammasome activation. Our study provides insight into a new target for therapeutic intervention based on a link between oxidative mtDNA damage, OGG1, and atherosclerosis via NLRP3 inflammasome.
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Affiliation(s)
- Gantsetseg Tumurkhuu
- From the Departments of Pediatrics, Biomedical Sciences, and Infectious and Immunologic Diseases Research Center (IIDRC) (G.T., K.S., J.D., T.R.C., W.Z., S.C.), Department of Pathology (D.L.), Cedars-Sinai Medical Center, Los Angeles, CA; Department of Medicine, Barbra Streisand Women's Heart Center, Heart Institute of Cedars-Sinai (R.A.G.), Cedars-Sinai Medical Center, Los Angeles, CA; and David Geffen School of Medicine, University of California, Los Angeles (M.A.)
| | - Kenichi Shimada
- From the Departments of Pediatrics, Biomedical Sciences, and Infectious and Immunologic Diseases Research Center (IIDRC) (G.T., K.S., J.D., T.R.C., W.Z., S.C.), Department of Pathology (D.L.), Cedars-Sinai Medical Center, Los Angeles, CA; Department of Medicine, Barbra Streisand Women's Heart Center, Heart Institute of Cedars-Sinai (R.A.G.), Cedars-Sinai Medical Center, Los Angeles, CA; and David Geffen School of Medicine, University of California, Los Angeles (M.A.)
| | - Jargalsaikhan Dagvadorj
- From the Departments of Pediatrics, Biomedical Sciences, and Infectious and Immunologic Diseases Research Center (IIDRC) (G.T., K.S., J.D., T.R.C., W.Z., S.C.), Department of Pathology (D.L.), Cedars-Sinai Medical Center, Los Angeles, CA; Department of Medicine, Barbra Streisand Women's Heart Center, Heart Institute of Cedars-Sinai (R.A.G.), Cedars-Sinai Medical Center, Los Angeles, CA; and David Geffen School of Medicine, University of California, Los Angeles (M.A.)
| | - Timothy R Crother
- From the Departments of Pediatrics, Biomedical Sciences, and Infectious and Immunologic Diseases Research Center (IIDRC) (G.T., K.S., J.D., T.R.C., W.Z., S.C.), Department of Pathology (D.L.), Cedars-Sinai Medical Center, Los Angeles, CA; Department of Medicine, Barbra Streisand Women's Heart Center, Heart Institute of Cedars-Sinai (R.A.G.), Cedars-Sinai Medical Center, Los Angeles, CA; and David Geffen School of Medicine, University of California, Los Angeles (M.A.)
| | - Wenxuan Zhang
- From the Departments of Pediatrics, Biomedical Sciences, and Infectious and Immunologic Diseases Research Center (IIDRC) (G.T., K.S., J.D., T.R.C., W.Z., S.C.), Department of Pathology (D.L.), Cedars-Sinai Medical Center, Los Angeles, CA; Department of Medicine, Barbra Streisand Women's Heart Center, Heart Institute of Cedars-Sinai (R.A.G.), Cedars-Sinai Medical Center, Los Angeles, CA; and David Geffen School of Medicine, University of California, Los Angeles (M.A.)
| | - Daniel Luthringer
- From the Departments of Pediatrics, Biomedical Sciences, and Infectious and Immunologic Diseases Research Center (IIDRC) (G.T., K.S., J.D., T.R.C., W.Z., S.C.), Department of Pathology (D.L.), Cedars-Sinai Medical Center, Los Angeles, CA; Department of Medicine, Barbra Streisand Women's Heart Center, Heart Institute of Cedars-Sinai (R.A.G.), Cedars-Sinai Medical Center, Los Angeles, CA; and David Geffen School of Medicine, University of California, Los Angeles (M.A.)
| | - Roberta A Gottlieb
- From the Departments of Pediatrics, Biomedical Sciences, and Infectious and Immunologic Diseases Research Center (IIDRC) (G.T., K.S., J.D., T.R.C., W.Z., S.C.), Department of Pathology (D.L.), Cedars-Sinai Medical Center, Los Angeles, CA; Department of Medicine, Barbra Streisand Women's Heart Center, Heart Institute of Cedars-Sinai (R.A.G.), Cedars-Sinai Medical Center, Los Angeles, CA; and David Geffen School of Medicine, University of California, Los Angeles (M.A.)
| | - Shuang Chen
- From the Departments of Pediatrics, Biomedical Sciences, and Infectious and Immunologic Diseases Research Center (IIDRC) (G.T., K.S., J.D., T.R.C., W.Z., S.C.), Department of Pathology (D.L.), Cedars-Sinai Medical Center, Los Angeles, CA; Department of Medicine, Barbra Streisand Women's Heart Center, Heart Institute of Cedars-Sinai (R.A.G.), Cedars-Sinai Medical Center, Los Angeles, CA; and David Geffen School of Medicine, University of California, Los Angeles (M.A.)
| | - Moshe Arditi
- From the Departments of Pediatrics, Biomedical Sciences, and Infectious and Immunologic Diseases Research Center (IIDRC) (G.T., K.S., J.D., T.R.C., W.Z., S.C.), Department of Pathology (D.L.), Cedars-Sinai Medical Center, Los Angeles, CA; Department of Medicine, Barbra Streisand Women's Heart Center, Heart Institute of Cedars-Sinai (R.A.G.), Cedars-Sinai Medical Center, Los Angeles, CA; and David Geffen School of Medicine, University of California, Los Angeles (M.A.).
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12
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Lee Y, Wakita D, Dagvadorj J, Shimada K, Chen S, Huang G, Lehman TJA, Fishbein MC, Hoffman HM, Crother TR, Arditi M. IL-1 Signaling Is Critically Required in Stromal Cells in Kawasaki Disease Vasculitis Mouse Model: Role of Both IL-1α and IL-1β. Arterioscler Thromb Vasc Biol 2015; 35:2605-16. [PMID: 26515418 DOI: 10.1161/atvbaha.115.306475] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 10/16/2015] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Kawasaki disease (KD) is the most common cause of acute vasculitis and acquired cardiac disease among US children. We have previously shown that both TLR2/MyD88 and interleukin (IL)-1β signaling are required for the Lactobacillus casei cell wall extract-induced KD vasculitis mouse model. The objectives of this study were to investigate the cellular origins of IL-1 production, the role of CD11c(+) dendritic cells and macrophages, and the relative contribution of hematopoietic and stromal cells for IL-1 responsive cells, as well the MyD88 signaling, in Lactobacillus casei cell wall extract-induced KD mouse model of vasculitis. APPROACH AND RESULTS Using mouse knockout models and antibody depletion, we found that both IL-1α and IL-1β were required for Lactobacillus casei cell wall extract-induced KD. Both dendritic cells and macrophages were necessary, and we found that MyD88 signaling was required in both hematopoietic and stromal cells. However, IL-1 response and signaling were critically required in nonendothelial stromal cells, but not in hematopoietic cells. CONCLUSIONS Our results suggest that IL-1α and IL-1β, as well as CD11c(+) dendritic cells and macrophages, are essential for the development of KD vasculitis and coronary arteritis in this mouse model. Bone marrow chimera experiments suggest that MyD88 signaling is important in both hematopoietic and stromal cells, whereas IL-1 signaling and response are required only in stromal cells, but not in endothelial cells. Determining the role of IL-1α and IL-1β and of specific cell types in the KD vasculitis mouse model may have important implications for the design of more targeted therapies and understanding of the molecular mechanisms of KD immunopathologies.
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Affiliation(s)
- Youngho Lee
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.)
| | - Daiko Wakita
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.)
| | - Jargalsaikhan Dagvadorj
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.)
| | - Kenichi Shimada
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.)
| | - Shuang Chen
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.)
| | - Ganghua Huang
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.)
| | - Thomas J A Lehman
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.)
| | - Michael C Fishbein
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.)
| | - Hal M Hoffman
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.)
| | - Timothy R Crother
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.)
| | - Moshe Arditi
- From the Division of Pediatric Infectious Diseases and Immunology, Department of Pediatric, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA (Y.L., D.W., J.D., K.S., S.C., G.H., T.R.C., M.A.); Department of Rheumatology, Pediatric Rheumatology, Hospital for Special Surgery and Weill Medical College of Cornell University, New York, NY (T.J.A.L.); Department of Pathology, David Geffen School of Medicine at UCLA (M.C.F.); and Department of Pediatrics, Pediatric Rheumatology, University of California, San Diego, La Jolla (H.M.H.).
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13
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Naiki Y, Komatsu T, Koide N, Dagvadorj J, Yoshida T, Arditi M, Yokochi T. TGF-β1 inhibits the production of IFN in response to CpG DNA via ubiquitination of TNF receptor-associated factor (TRAF) 6. Innate Immun 2015. [PMID: 26224488 DOI: 10.1177/1753425915596844] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The effect of TGF-β1 on CpG DNA-induced type I IFN production was examined by reconstituting a series of signaling molecules in TLR 3 signaling. TGF-β1 inhibited CpG DNA-induced IFN-α4 productivity in HeLa cells. Transfection of IFN regulatory factor (IRF)7 but not TNF receptor-associated factor (TRAF)6 and TRAF3 into cells triggered IFN-α4 productivity, and TGF-β1 inhibited IRF7-mediated type I IFN production in the presence of TRAF6. TGF-β1 induced ubiquitination of TRAF6, although CpG DNA did not induce it. Moreover, TGF-β1 accelerated the ubiquitination of TRAF6 in the presence of CpG DNA. TGF-β1 ubiquitinated TRAF6 at K63 but not K48. TGF-β1 also induced ubiquitination of IRF7. Further, TGF-β1 did not impair the interaction of IRF7 and TRAF6. CpG DNA induced the phosphorylation of IRF7 in the presence of TRAF6, whereas TGF-β1 inhibited the IRF7 phosphorylation. Blocking of TRAF6 ubiquitination abolished the inhibition of CpG DNA-induced type I IFN production by TGF-β. Taken together, TGF-β was suggested to inhibit CpG DNA-induced type I IFN production transcriptionally via ubiquitination of TRAF6.
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Affiliation(s)
- Yoshikazu Naiki
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Takayuki Komatsu
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Naoki Koide
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Jargalsaikhan Dagvadorj
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan Division of Pediatrics Infectious Disease and Immunology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Tomoaki Yoshida
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Moshe Arditi
- Division of Pediatrics Infectious Disease and Immunology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Takashi Yokochi
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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14
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Tumurkhuu G, Dagvadorj J, Crother TR, Shimada K, Arditi M, Chen S. Abstract 168: The Acceleration of Foam Cell Formation by Chlamydia Pneumoniae Requires Nlrp3 Inflammasome Activation and Il-1 Signaling. Arterioscler Thromb Vasc Biol 2015. [DOI: 10.1161/atvb.35.suppl_1.168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background & Objective:
Foam cell formation (FCF) due to excessive accumulation of cholesterol by macrophages is a pathological hallmark of atherosclerosis. Chlamydia pneumoniae (Cp) promotes FCF in the presence of oxLDL, but the exact molecular mechanisms are still not completely delineated. Recent data indicates that the Nlrp3 inflammasome plays an important role in the formation of atherosclerotic plaques. Here we investigated the role of the Nlrp3 inflammasome during the acceleration of FCF by Cp infection.
Methods and Results:
In order to determine if the NLRP3 inflammasome played a role in Cp infection induced acceleration of FCF, we treated resident peritoneal macrophages exposed to oxLDL and Cp with the IL-1R antagonist, Anakinra, to block IL-1 signaling. Treatment with Anakinra resulted in a significant reduction in FCF. Nlrp3-/-, Casp1-/-, and WT macrophages were also treated with live Cp in the presence or absence of oxLDL. We found that Nlrp3-/- and Casp1-/- macrophages had significantly less FCF compared with WT cells. Interestingly, both ABCA1 (cholesterol efflux transporter) and its transcription factor, liver X receptor (LXR-α), were increased in Nlrp3-/- and Casp1-/- macrophages compared with WT cells. Addition of rIL-1β to Nlrp3-/- macrophages led to a decrease in ABCA1 expression and greater FCF. Importantly, Il1r-/- macrophages also had greater ABCA1 expression and reduced FCF when exposed to oxLDL and Cp infection.
Conclusion:
These data suggest that Cp infection facilitates foam cell formation in the presence of oxLDL by producing NLRP3 dependent IL-1 cytokines, which then feed back on the macrophages and interferes with cholesterol efflux by negatively regulating ABCA1. In the absence of IL-1 signaling, the expression of ABCA1 is upregulated leading to greater cholesterol efflux and reduced FCF. Thus we have identified a novel regulatory loop controlling FCF. Understanding these interacting pathways will lead to new therapeutic strategies against atherosclerosis.
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Affiliation(s)
- Gantsetseg Tumurkhuu
- Infectious and Immunological Diseases Rsch Cntr, Cedars-Sinai Med Cntr, Los Angeles, CA
| | | | - Timothy R Crother
- Infectious and Immunological Diseases Rsch Cntr, Cedars-Sinai Med Cntr, Los Angeles, CA
| | - Kenichi Shimada
- Infectious and Immunological Diseases Rsch Cntr, Cedars-Sinai Med Cntr, Los Angeles, CA
| | - Moshe Arditi
- Infectious and Immunological Diseases Rsch Cntr, Cedars-Sinai Med Cntr, Los Angeles, CA
| | - Shuang Chen
- Infectious and Immunological Diseases Rsch Cntr, Cedars-Sinai Med Cntr, Los Angeles, CA
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15
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Kato Y, Kamiya H, Koide N, Odkhuu E, Komatsu T, Dagvadorj J, Watarai A, Kondo M, Kato K, Nakamura J, Yokochi T. Spironolactone inhibits production of proinflammatory mediators in response to lipopolysaccharide via inactivation of nuclear factor-κB. Immunopharmacol Immunotoxicol 2015; 36:237-41. [PMID: 24852317 DOI: 10.3109/08923973.2014.921690] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The effect of spironolactone (SPIR) on lipopolysaccharide (LPS)-induced production of proinflammatory mediators was examined using RAW 264.7 macrophage-like cells and mouse peritoneal macrophages. SPIR significantly inhibited LPS-induced production of nitric oxide (NO), tumor necrosis factor-α and prostaglandin E2. The inhibition was not mediated by cell death. SPIR reduced the expression of an inducible NO synthase mRNA in response to LPS. SPIR significantly inhibited phosphorylation of p65 nuclear factor (NF)-κB in response to LPS. Furthermore, SPIR inhibited phosphorylation of IκB kinase (IKK) as an upstream molecule of NF-κB in response to LPS. LPS did not induce the production of aldosterone in RAW 264.7 cells. Taken together, SPIR is suggested to inhibit LPS-induced proinflammatory mediators via inactivation of IKK/NF-κB in LPS signaling.
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Affiliation(s)
- Yoshiro Kato
- Division of Diabetes, Department of Internal Medicine, Diabetes Center , Nagakute , Japan
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16
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Tumurkhuu G, Dagvadorj J, Jones HD, Chen S, Shimada K, Crother TR, Arditi M. Alternatively spliced myeloid differentiation protein-2 inhibits TLR4-mediated lung inflammation. J Immunol 2015; 194:1686-94. [PMID: 25576596 DOI: 10.4049/jimmunol.1402123] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We previously identified a novel alternatively spliced isoform of human myeloid differentiation protein-2 (MD-2s) that competitively inhibits binding of MD-2 to TLR4 in vitro. In this study, we investigated the protective role of MD-2s in LPS-induced acute lung injury by delivering intratracheally an adenovirus construct that expressed MD-2s (Ad-MD-2s). After adenovirus-mediated gene transfer, MD-2s was strongly expressed in lung epithelial cells and readily detected in bronchoalveolar lavage fluid. Compared to adenovirus serotype 5 containing an empty vector lacking a transgene control mice, Ad-MD-2s delivery resulted in significantly less LPS-induced inflammation in the lungs, including less protein leakage, cell recruitment, and expression of proinflammatory cytokines and chemokines, such as IL-6, keratinocyte chemoattractant, and MIP-2. Bronchoalveolar lavage fluid from Ad-MD-2s mice transferred into lungs of naive mice before intratracheal LPS challenge diminished proinflammatory cytokine levels. As house dust mite (HDM) sensitization is dependent on TLR4 and HDM Der p 2, a structural homolog of MD-2, we also investigated the effect of MD-2s on HDM-induced allergic airway inflammation. Ad-MD-2s given before HDM sensitization significantly inhibited subsequent allergic airway inflammation after HDM challenge, including reductions in eosinophils, goblet cell hyperplasia, and IL-5 levels. Our study indicates that the alternatively spliced short isoform of human MD-2 could be a potential therapeutic candidate to treat human diseases induced or exacerbated by TLR4 signaling, such as Gram-negative bacterial endotoxin-induced lung injury and HDM-triggered allergic lung inflammation.
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Affiliation(s)
- Gantsetseg Tumurkhuu
- Division of Infectious Diseases and Immunology, Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048; Department of Biomedical Sciences, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048; and
| | - Jargalsaikhan Dagvadorj
- Division of Infectious Diseases and Immunology, Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048; Department of Biomedical Sciences, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048; and
| | - Heather D Jones
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Shuang Chen
- Division of Infectious Diseases and Immunology, Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048; Department of Biomedical Sciences, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048; and
| | - Kenichi Shimada
- Division of Infectious Diseases and Immunology, Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048; Department of Biomedical Sciences, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048; and
| | - Timothy R Crother
- Division of Infectious Diseases and Immunology, Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048; Department of Biomedical Sciences, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048; and
| | - Moshe Arditi
- Division of Infectious Diseases and Immunology, Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048; Department of Biomedical Sciences, Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048; and
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17
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Jones HD, Crother TR, Gonzalez-Villalobos RA, Jupelli M, Chen S, Dagvadorj J, Arditi M, Shimada K. The NLRP3 inflammasome is required for the development of hypoxemia in LPS/mechanical ventilation acute lung injury. Am J Respir Cell Mol Biol 2014; 50:270-80. [PMID: 24007300 DOI: 10.1165/rcmb.2013-0087oc] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
IL-1β is a potent proinflammatory cytokine that is implicated in the pathogenesis of acute respiratory distress syndrome. We hypothesized that LPS and mechanical ventilation (MV) together could lead to IL-1β secretion and the development of acute lung injury (ALI), and that this process would be dependent on caspase-1 and the nucleotide binding domain and leucine-rich repeat (NLR) pyrin domain containing 3 (NLRP3) inflammasome activation. The objectives of this study were to determine the specific role of IL-1β, caspase-1, and the NLRP3 inflammasome in a two-hit model of ALI due to LPS plus MV. We used a two-hit murine model of ALI in which both inhaled LPS and MV were required for the development of hypoxemia, pulmonary neutrophil infiltration, and alveolar leakage. Nlrp3-deficent and Casp1-deficient mice had significantly diminished IL-1β levels in bronchoalveolar lavage fluid, and were specifically protected from hypoxemia, despite similar alveolar neutrophil infiltration and leakage. The IL-1 receptor antagonist, Anakinra, significantly improved the specific development of hypoxemia without significant effects on neutrophil infiltration or alveolar leakage. MV resulted in increased bronchoalveolar lavage extracellular ATP and alveolar macrophage apoptosis as triggers of NLRP3 inflammasome activation. NLRP3 inflammasome activation and IL-1β production play a key role in ALI caused by the combination of LPS and MV, particularly in the hypoxemia associated with acute respiratory distress syndrome. Blocking IL-1 signaling in this model specifically ameliorates hypoxemia, without affecting neutrophil infiltration and alveolar leakage, disassociating these readouts of ALI. MV causes alveolar macrophage apoptosis, a key step in the activation of NLRP3 inflammasome and production of IL-1β.
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18
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Gray P, Dagvadorj J, Michelsen KS, Brikos C, Rentsendorj A, Town T, Crother TR, Arditi M. Myeloid differentiation factor-2 interacts with Lyn kinase and is tyrosine phosphorylated following lipopolysaccharide-induced activation of the TLR4 signaling pathway. J Immunol 2011; 187:4331-7. [PMID: 21918188 DOI: 10.4049/jimmunol.1100890] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Stimulation with LPS induces tyrosine phosphorylation of numerous proteins involved in the TLR signaling pathway. In this study, we demonstrated that myeloid differentiation factor-2 (MD-2) is also tyrosine phosphorylated following LPS stimulation. LPS-induced tyrosine phosphorylation of MD-2 is specific; it is blocked by the tyrosine kinase inhibitor, herbimycin A, as well as by an inhibitor of endocytosis, cytochalasin D, suggesting that MD-2 phosphorylation occurs during trafficking of MD-2 and not on the cell surface. Furthermore, we identified two possible phospho-accepting tyrosine residues at positions 22 and 131. Mutant proteins in which these tyrosines were changed to phenylalanine had reduced phosphorylation and significantly diminished ability to activate NF-κB in response to LPS. In addition, MD-2 coprecipitated and colocalized with Lyn kinase, most likely in the endoplasmic reticulum. A Lyn-binding peptide inhibitor abolished MD-2 tyrosine phosphorylation, suggesting that Lyn is a likely candidate to be the kinase required for MD-2 tyrosine phosphorylation. Our study demonstrated that tyrosine phosphorylation of MD-2 is important for signaling following exposure to LPS and underscores the importance of this event in mediating an efficient and prompt immune response.
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Affiliation(s)
- Pearl Gray
- Division of Pediatric Infectious Diseases and Immunology, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
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19
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Shadat NMA, Koide N, Khuda IIE, Dagvadorj J, Tumurkhuu G, Naiki Y, Komatsu T, Yoshida T, Yokochi T. Retinoblastoma protein-interacting zinc finger 1 (RIZ1) regulates the proliferation of monocytic leukemia cells via activation of p53. Cancer Invest 2010; 28:806-12. [PMID: 20594067 DOI: 10.3109/07357907.2010.494323] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The role of retinoblastoma protein-interacting zinc finger 1 (RIZ1) on the cell growth of mouse and human monocytic leukemia cells was examined. RIZ1 expression was induced in response to tumor necrosis factor (TNF)-α. The expression was dependent on the nuclear factor-κB and AKT signaling. Further, RIZ1 expression led to the augmentation of p53 expression and the silencing of RIZ1 prevented it. On the other hand, a p53 inhibitor enhanced the TNF-α-induced RIZ1 expression. Silencing of RIZ1 augmented the proliferative activity of TNF-α-treated cells. Therefore, it is suggested that RIZ1 negatively regulated the cell proliferation of monocytic leukemia cells via activation of p53.
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Affiliation(s)
- Noman Mohammod Abu Shadat
- Department of Microbiology and Immunology, School of Medicine, Aichi Medical University, Nagakute, Aichi 480-1195, Japan
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20
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Dagvadorj J, Tumurkhuu G, Naiki Y, Noman ASM, Iftakhar-E-Khuda I, Badamtseren B, Komatsu T, Koide N, Yoshida T, Yokochi T. Endotoxin-induced lung injury in α-galactosylceramide-sensitized mice is caused by failure of interleukin-4 production in lung natural killer T cells. Clin Exp Immunol 2010; 162:169-77. [PMID: 20659123 DOI: 10.1111/j.1365-2249.2010.04225.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Administration of bacterial lipopolysaccharide (LPS) known as endotoxin into α-galactosylceramide (α-GalCer)-sensitized mice causes severe lung lesions but few hepatic lesions in lethal shock, and interferon (IFN)-γ is suggested to play a pivotal role in preparation of the lung lesions. In order to clarify the mechanism of how α-GalCer sensitization causes lung lesions exclusively in mice, we examined the differential responsiveness of lungs and livers to α-GalCer sensitization. Although lung and liver natural killer T (NK T) cells both produced IFN-γ in response to α-GalCer, IFN-γ signalling was triggered only in the lungs of α-GalCer-sensitized mice. Lung NK T cells did not produce interleukin (IL)-4 in response to α-GalCer and it did not induce the expression of suppressor of cytokine signalling 1 (SOCS1) in the lungs. Conversely, IL-4 produced by liver NK T cells led to the expression of SOCS1 in the livers of the mice. Neutralization of IL-4 reduced SOCS1 expression in the livers and exacerbated LPS-induced hepatic lesions. IL-10 was produced by liver NK T cells but not lung NK T cells. However, IL-10 was produced constitutively by alveolar epithelial cells in normal lung. Lung NK T cells and liver NK T cells might express CD8 and CD4, respectively. Based on the fact that IL-4 inhibited IFN-γ signalling in the livers of α-GalCer-sensitized mice via SOCS1 expression and signal transducer and activator of transcription 1 (STAT-1) activation, no inhibition of the IFN-γ signalling in the lungs caused LPS-induced lung lesions in α-GalCer-sensitized mice. The detailed mechanism of development of the lung lesions in α-GalCer-sensitized mice is discussed.
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Affiliation(s)
- J Dagvadorj
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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21
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Kato Y, Koide N, Komatsu T, Tumurkhuu G, Dagvadorj J, Kato K, Yokochi T. Metformin attenuates production of nitric oxide in response to lipopolysaccharide by inhibiting MyD88-independent pathway. Horm Metab Res 2010; 42:632-6. [PMID: 20560107 DOI: 10.1055/s-0030-1255033] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Metformin is reported to ameliorate inflammation in diabetic patients. The effect of metformin on lipopolysaccharide-induced nitric oxide production was studied by using RAW 264.7 macrophage-like cells. The action of metformin was analyzed by dividing lipopolysaccharide signaling into the MyD88-dependent and -independent pathways. Metformin significantly reduced the expression of an inducible type of nitric oxide synthase and inhibited lipopolysaccharide-induced nitric oxide production. On the other hand, metformin did not inhibit lipopolysaccharide-induced tumor necrosis factor-alpha production. The expression levels of interferon-beta protein and mRNA, which is a key molecule in MyD88-independent pathway, were significantly inhibited by metformin. Compound C, a specific AMP-activated protein kinase inhibitor, did not affect the inhibitory action of metformin. Metformin was suggested to inhibit lipopolysaccharide-induced nitric oxide production via inhibition of interferon-beta production in MyD88-independent pathway. Metformin might exhibit an anti- inflammatory action on diabetic complications as well as the antidiabetic action.
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Affiliation(s)
- Y Kato
- Department of Internal Medicine, Division of Endocrinology, Metabolism and Diabetes, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan.
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22
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Noman ASM, Koide N, Iftakhar-E-Khuda I, Dagvadorj J, Tumurkhuu G, Naiki Y, Komatsu T, Yoshida T, Yokochi T. Retinoblastoma protein-interacting zinc finger 1, a tumor suppressor, augments lipopolysaccharide-induced proinflammatory cytokine production via enhancing nuclear factor-kappaB activation. Cell Immunol 2010; 264:114-8. [PMID: 20557878 DOI: 10.1016/j.cellimm.2010.05.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Revised: 05/08/2010] [Accepted: 05/17/2010] [Indexed: 12/28/2022]
Abstract
The involvement of retinoblastoma protein-interacting zinc finger 1 (RIZ1), a tumor suppressor, in lipopolysaccharide (LPS)-induced inflammatory responses was investigated by using RAW 264.7 macrophage-like cells. LPS significantly augmented the expression of RIZ1 and the augmentation was mediated by the activation of nuclear factor (NF)-kappaB and Akt. The silencing of RIZ1 with the siRNA led to the inactivation of NF-kappaB in response to LPS. Moreover, the RIZ1 silencing caused the down-regulation of p53 activation and a p53 pharmacological inhibitor attenuated the RIZ1 expression. LPS-induced tumor necrosis factor-alpha and interleukin-6 production was prevented by RIZ1 siRNA or a p53 pharmacological inhibitor. Therefore, RIZ1 was suggested to augment LPS-induced NF-kappaB activation in collaboration with p53 and enhance the production of proinflammatory cytokines in response to LPS.
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Affiliation(s)
- Abu Shadat Mohammod Noman
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi 480-1195, Japan
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23
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Noman ASM, Koide N, Iftakhar-E-Khuda I, Dagvadorj J, Tumurkhuu G, Naiki Y, Komatsu T, Yoshida T, Yokochi T. Retinoblastoma protein-interacting zinc finger 1 (RIZ1) participates in RANKL-induced osteoclast formation via regulation of NFATc1 expression. Immunol Lett 2010; 131:166-9. [PMID: 20417662 DOI: 10.1016/j.imlet.2010.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Revised: 04/16/2010] [Accepted: 04/18/2010] [Indexed: 10/19/2022]
Abstract
The role of retinoblastoma protein-interacting zinc finger 1 (RIZ1) in receptor activator of NF-kappaB ligand (RANKL)-induced osteoclast formation was examined in mouse RAW 264.7 macrophage-like cells. The expression of RIZ1 was significantly augmented by RANKL-treated cells. Silencing of RIZ1 with the siRNA significantly reduced the appearance of tartrate-resistant acid phosphatase (TRAP)-positive multinucleated cells as osteoclasts in RANKL-treated cells. The expression of nuclear factor of activated T cell 1 (NFATc1) as the terminal transcription factor of osteoclast formation was prevented by RIZ1 siRNA. It was suggested that that RIZ1 might participate in RANKL-induced osteoclast formation through the regulation of NFATc1 expression.
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Affiliation(s)
- Abu Shadat Mohammod Noman
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi 480-1195, Japan
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24
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Khuda IIE, Koide N, Noman ASM, Dagvadorj J, Tumurkhuu G, Naiki Y, Komatsu T, Yoshida T, Yokochi T. Seladin-1 is a novel lipopolysaccharide (LPS)-responsive gene and inhibits the tumour necrosis factor-alpha production and osteoclast formation in response to LPS. Immunology 2010; 131:59-66. [PMID: 20406300 DOI: 10.1111/j.1365-2567.2010.03274.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Selective Alzheimer disease indicator-1 (seladin-1) is a broadly expressed oxidoreductase and is related to Alzheimer disease, cholesterol metabolism and carcinogenesis. The effect of lipopolysaccharide (LPS) on the expression of seladin-1 was examined using RAW 264.7 macrophage-like cells and murine peritoneal macrophages. Lipopolysaccharide induced the expression of seladin-1 protein and messenger RNA in those macrophages. The seladin-1 expression was also augmented by a series of Toll-like receptor ligands. The LPS augmented the expression of seladin-1 via reactive oxygen species generation and p38 activation. Seladin-1 inhibited LPS-induced activation of p38 but not nuclear factor-kappaB and inhibited the production of tumour necrosis factor-alpha in response to LPS. Moreover, seladin-1 inhibited LPS-induced osteoclast formation and enhanced LPS-induced alkaline phosphatase activity. Therefore, it was suggested that seladin-1 might be an LPS-responsible gene product and regulate the LPS-induced inflammatory response negatively.
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Affiliation(s)
- Imtiaz I-E Khuda
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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25
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Dagvadorj J, Naiki Y, Tumurkhuu G, Noman ASM, Iftakhar-E-Khuda I, Komatsu T, Koide N, Yoshida T, Takashi Yokochi. Tumor necrosis factor-a augments lipopolysaccharide-induced suppressor of cytokine signalling 3 (SOCS-3) protein expression by preventing the degradation. Immunology 2010; 129:97-104. [PMID: 20050332 DOI: 10.1111/j.1365-2567.2009.03154.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The regulatory role of tumour necrosis factor-a (TNF-a) on the expression of suppressor of cytokine signalling 3 (SOCS-3) in response to lipopolysaccharide (LPS) was examined using peritoneal macrophages from TNF-a-deficient mice. The LPS-induced SOCS-3 expression was markedly augmented in macrophages from wild-type mice whereas such augmentation was not seen in the cells from TNF-a-deficient mice. However, there was no significant difference in the level of SOCS-3 messenger RNA expression between macrophages from wild-type mice and those from TNF-a-deficient mice. The addition of exogenous TNF-a augmented the LPS-induced SOCS-3 expression in macrophages from TNF-a-deficient mice. The pulse chase analysis suggested augmented degradation of LPS-induced SOCS-3 protein in macrophages from TNF-a-deficient mice. Moreover, MG 132, a 26S proteasome inhibitor, sustained the LPS-induced SOCS-3 expression in those cells. The tyrosine phosphorylation of SOCS-3 was definitely induced in LPS-stimulated macrophages from TNF-a-deficient mice but not wild-type mice. A tyrosine phosphatase inhibitor enhanced the tyrosine phosphorylation of SOCS-3 in wild-type mice and accelerated the degradation. Therefore, it was suggested that TNF-a prevented the degradation of SOCS-3 protein via inhibition of the tyrosine phosphorylation in LPS-stimulated macrophages.
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Affiliation(s)
- Jargalsaikhan Dagvadorj
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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26
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Tumurkhuu G, Koide N, Hiwasa T, Ookoshi M, Dagvadorj J, Abu Shadat Mohammod Noman, Iftakhar-E-Khuda I, Naiki Y, Komatsu T, Yoshida T, Yokochi T. ONO 3403, a synthetic serine protease inhibitor, inhibits lipopolysaccharide-induced tumor necrosis factor-{alpha} and nitric oxide production and protects mice from lethal endotoxic shock. Innate Immun 2009; 17:97-105. [PMID: 20023007 DOI: 10.1177/1753425909353641] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
ONO 3403, a new synthetic serine protease inhibitor, is a derivative of camostat mesilate and has a higher protease-inhibitory activity. The effect of ONO 3403 on lipopolysaccharide (LPS)-induced tumor necrosis factor (TNF)-α and nitric oxide (NO) production in RAW 264.7 macrophage-like cells was examined. ONO 3403 significantly inhibited LPS-induced TNF-α production at a lower concentration than camostat mesilate. It also inhibited LPS-induced NO production. Their inhibition was responsible for the reduced mRNA expression of TNF-α and inducible NO synthase. In LPS-stimulated cells, ONO 3403 prevented the augmentation of MyD88 expression and inhibited the phosphorylation of IκB-α, stress-activated protein kinase (SAPK) and IRF-3, and the production of interferon-β. ONO 3403 abolished the elevation of the extracellular serine protease activity in response to LPS. Further, it reduced the circulating TNF-α level, hepatic injury and mortality in mice receiving an injection of D-galactosamine and LPS. ONO 3403 was suggested to inhibit LPS-induced inflammatory responses via inactivation of MyD88-dependent and independent pathways.
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Affiliation(s)
- Gantsetseg Tumurkhuu
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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27
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Tumurkhuu G, Koide N, Dagvadorj J, Noman ASM, Khuda IIE, Naiki Y, Komatsu T, Yoshida T, Yokochi T. B1 cells produce nitric oxide in response to a series of toll-like receptor ligands. Cell Immunol 2009; 261:122-7. [PMID: 20036355 DOI: 10.1016/j.cellimm.2009.11.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2009] [Revised: 11/23/2009] [Accepted: 11/25/2009] [Indexed: 01/16/2023]
Abstract
The effect of a series of toll-like receptor (TLR) ligands on the production of nitric oxide (NO) in mouse B1 cells was examined by using CD5(+) IgM(+) WEHI 231 cells. The stimulation with a series of TLR ligands, which were Pam3Csk4 for TLR1/2, poly I:C for TLR3, lipopolysaccharide (LPS) for TLR4, imiquimod for TLR7 and CpG DNA for TLR9, resulted in enhanced NO production via augmented expression of an inducible type of NO synthase (iNOS). LPS was most potent for the enhancement of NO production, followed by poly I:C and Pam3Csk4. Imiquimod and CpG DNA led to slight NO production. The LPS-induced NO production was dependent on MyD88-dependent pathway consisting of nuclear factor (NF)-kappaB and a series of mitogen-activated protein kinases (MAPKs). Further, it was also dependent on the MyD88-independent pathway consisting of toll-IL-1R domain-containing adaptor-inducing IFN-beta (TRIF) and interferon regulatory factor (IRF)-3. Physiologic peritoneal B1 cells also produced NO via the iNOS expression in response to LPS. The immunological significance of TLR ligands-induced NO production in B1 cells is discussed.
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Affiliation(s)
- Gantsetseg Tumurkhuu
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Japan
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Noman ASM, Koide N, Khuda IIE, Dagvadorj J, Tumurkhuu G, Naiki Y, Komatsu T, Yoshida T, Yokochi T. Abstract A61: Retinoblastoma protein-interacting zinc finger 1 (RIZ1) regulates proliferation of monocytic leukemia cells in response to tumor necrosis factor (TNF)-α via activation of p53. Cancer Res 2009. [DOI: 10.1158/0008-5472.fbcr09-a61] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Purpose of the Study: Retinoblastoma protein-interacting zinc finger 1 (RIZ1) is a tumor suppressor whose inactivation plays an important role in several human cancers including leukemia, osteosarcoma and breast cancer whereas the forced expression of RIZ1 inhibits tumor progression. But how the expression of RIZ1 inhibits tumor cell growth and the signaling molecules involved in this mechanism is not clear yet. The implication of inflammatory mechanisms in regulating cancer is current concern. Tumor necrosis factor (TNF)-α is an inflammatory cytokine which potentially regulates tumor microenvironment especially in myeloma and leukemia. The present study was designed to understand the regulatory action of RIZ1 on the cell proliferation of monocytic leukemia cells in response to TNF-α that is yet to characterize.
Experimental Procedures: Mouse and human monocytic leukemia cells RAW 267.4 and U937 were stimulated with TNF-α at different dose and time dependent manner and the expression of RIZ1 were analyzed by immunoblotting and RT-PCR, respectively. To clarify the signal molecules triggering TNF-α-induced RIZ1 expression, cells were treated with pharmacological inhibitors or transfected with dominant negative mutants. To investigate the RIZ1 and p53 interaction, cells were transfected with RIZ1-specific (400 nM) and nonspecific siRNA and immunoblot with anti p53 antibody. RIZ1 was immunoprecipitated by anti-RIZ1 antibody and p53 was analyzed by immunoblotting. The effect of p53 inhibitor on TNF-α-induced RIZ1 expression was examined to check the role of p53 on RIZ1 expression. The effect of RIZ1 siRNA on the proliferation of TNF-α-treated cells were examined by a cell proliferation assay using BrdU and further confirmed by the expression of PCNA as a cell proliferation marker. To assess the anchorage independent growth, a soft agar colony assay was performed.
Results: RIZ1 was significantly induced by TNF-α in RAW 264.7 and U937 cells in time and dose dependently. TNF-α induced RIZ1 expression was clearly suppressed by NF-κB and AKT dominant negative plasmid as well as pharmacological inhibitors. RIZ1 siRNA inhibited the activation of p53 in TNF-α-treated cells. The presence of p53 in the RIZ1 fraction precipitated by anti-RIZ1 antibody suggests the formation of RIZ1/p53 complex. Further, augmentation of RIZ1 expression by p53 inhibitor indicates the negative feedback by p53. The expression of PCNA and cell growth in TNF-α-treated monocytic leukemia cells were increased in RIZ1 silenced cells. The down-regulation of RIZ1 with the siRNA enhanced the soft agar colony formation in TNF-α-treated cells. Conclusion: RIZ1 was induced by TNF-α and the expression was dependent on NF-κB and AKT signaling. Further, silencing of RIZ1 prevented p53 activation and augmented the proliferative activity of TNF-α-treated cells. Here, we demonstrate that RIZ1 negatively regulates the proliferation of TNF-α treated monocytic leukemia cells via activation of p53. The RIZ1-p53 interaction might explore many questions to understand tumor suppressive mechanism of p53.
Citation Information: Cancer Res 2009;69(23 Suppl):A61.
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Affiliation(s)
- Abu Shadat M. Noman
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Naoki Koide
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Imtiaz I.-E. Khuda
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Jargalsaikhan Dagvadorj
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Gantsetseg Tumurkhuu
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Yoshikazu Naiki
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Takayuki Komatsu
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Tomoaki Yoshida
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Takashi Yokochi
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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Dagvadorj J, Naiki Y, Tumurkhuu G, Noman ASM, Iftekar-E-Khuda I, Koide N, Komatsu T, Yoshida T, Yokochi T. Interleukin (IL)-10 attenuates lipopolysaccharide-induced IL-6 production via inhibition of IkappaB-zeta activity by Bcl-3. Innate Immun 2009; 15:217-24. [PMID: 19586995 DOI: 10.1177/1753425909103738] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The inhibitory effect of interleukin-10 (IL-10), an anti-inflammatory cytokine, on lipopolysaccharide (LPS)-induced IL-6 production was characterized by simultaneous stimulation of RAW 264.7 cells with LPS and IL-10. The presence of IL-10 significantly inhibited LPS-induced IL-6 production at a transcriptional level. The expression of IkappaB-zeta, which promotes IL-6 production, was induced in response to LPS and it was definitely suppressed in the presence of IL-10. Further, IL-10 inhibited LPS-induced NF-kappaB activation. A pharmacological inhibitor of NF-kappaB prevented LPS-induced IkappaB-zeta expression, suggesting that IL-10 might inhibit LPS-induced IkappaB-zeta expression via the inactivation of NF-kappaB. In LPS- and IL-10-stimulated cells, the expression of Bcl-3 that inhibits NF-kappaB activation was significantly augmented. Introduction of Bcl-3 siRNA abolished IL-10-mediated IkappaB-zeta inhibition. In the presence of Bcl-3, siRNA IL-10 failed to inhibit LPS-induced IL-6 production. Therefore, it was suggested that Bcl-3 induced by IL-10 might reduce LPS-induced IkappaB-zeta activity via inactivation of NF-kappaB and that reduced IkappaB-zeta activity failed to promote LPS-induced IL-6 production.
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Affiliation(s)
- Jargalsaikhan Dagvadorj
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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Noman ASM, Koide N, Khuda IIE, Dagvadorj J, Tumurkhuu G, Naiki Y, Komatsu T, Yoshida T, Yokochi T. Thalidomide inhibits lipopolysaccharide-induced nitric oxide production and prevents lipopolysaccharide-mediated lethality in mice. ACTA ACUST UNITED AC 2009; 56:204-11. [PMID: 19538513 DOI: 10.1111/j.1574-695x.2009.00567.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The effect of thalidomide on lipopolysaccharide-induced nitric oxide (NO) production was studied using RAW 264.7 macrophage-like cells. Thalidomide significantly inhibited lipopolysaccharide-induced NO production via reduced expression of an inducible NO synthase. Thalidomide reduced the phosphorylation of the p65 nuclear factor-kappaB subunit, inhibitory kappaB (IkappaB) and IkappaB kinase in lipopolysaccharide-stimulated cells. However, thalidomide did not affect the expression of interferon-beta (IFN-beta) and interferon regulatory factor-1 in response to lipopolysaccharide. Further, thalidomide inhibited the MyD88 augmentation in lipopolysaccharide-stimulated cells, whereas it did not alter the expression of TIR domain-containing adaptor-inducing IFN-beta in the MyD88-independent pathway. Thalidomide significantly inhibited the NO production in response to Pam(3)Cys, CpG DNA and imiquimod as MyD88-dependent Toll-like receptor (TLR) ligands, but not polyI:C as a MyD88-independent TLR ligand. Therefore, thalidomide was suggested to inhibit lipopolysaccharide-induced NO production via downregulation of the MyD88-dependent signal pathway. The anti-inflammatory action of thalidomide might be involved in the prevention of lipopolysaccharide-mediated lethality in mice.
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Affiliation(s)
- Abu Shadat M Noman
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Aichi 480-1195, Japan
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Koide N, Naiki Y, Morikawa A, Tumurkhuu G, Dagvadorj J, Noman ASM, Iftekar-E-Khuda I, Komatsu T, Yoshida T, Yokochi T. Nystatin-induced nitric oxide production in mouse macrophage-like cell line RAW264.7. Microbiol Immunol 2009; 53:295-300. [DOI: 10.1111/j.1348-0421.2009.00118.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Iftakhar-E-Khuda I, Koide N, Hassan F, Noman ASM, Dagvadorj J, Tumurkhuu G, Naiki Y, Komatsu T, Yoshida T, Yokochi T. Novel mechanism of U18666A-induced tumour necrosis factor-alpha production in RAW 264.7 macrophage cells. Clin Exp Immunol 2009; 155:552-8. [PMID: 19220841 DOI: 10.1111/j.1365-2249.2008.03779.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
U18666A is a cholesterol transport-inhibiting agent that is used widely to mimic Niemann-Pick type C disease. The effect of U18666A on tumour necrosis factor (TNF)-alpha production in mouse macrophage cell line, RAW 264.7 cells and peritoneal macrophages was examined. U18666A induced TNF-alpha mRNA expression 48 h after the treatment, and TNF-alpha production 48 and 72 h after stimulation in RAW 264.7 cells. U18666A accumulated intracellular free cholesterol in the culture of normal medium but not cholesterol-free medium. U18666A also induced reactive oxygen species (ROS) generation in normal medium but much less in cholesterol-free medium. Anti-oxidant N-acetyl-L-cysteine (NAC) abolished U18666A-induced TNF-alpha production. U18666A led to the phosphorylation of p38 mitogen-activated protein kinase 24 and 48 h after the stimulation and the p38 activation was inhibited in presence of cholesterol-free medium or NAC. A p38 inhibitor reduced U18666A-induced TNF-alpha production. Taken together, U18666A was suggested to induce TNF-alpha production in RAW 264.7 cells via free cholesterol accumulation-mediated ROS generation.
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Affiliation(s)
- I Iftakhar-E-Khuda
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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Hassan F, Islam S, Tumurkhuu G, Dagvadorj J, Naiki Y, Komatsu T, Koide N, Yoshida T, Yokochi T. Involvement of interleukin-1 receptor-associated kinase (IRAK)-M in toll-like receptor (TLR) 7-mediated tolerance in RAW 264.7 macrophage-like cells. Cell Immunol 2009; 256:99-103. [PMID: 19251253 DOI: 10.1016/j.cellimm.2009.01.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2008] [Revised: 01/30/2009] [Accepted: 01/31/2009] [Indexed: 12/19/2022]
Abstract
The effect of toll-like receptor (TLR) 7 ligand pretreatment on the production of tumor necrosis factor (TNF)-alpha in response to TLR7 or TLR2 ligand was examined in order to establish a new TLR-mediated tolerance. RAW 264.7 macrophage-like cells were treated with imiquimod R837 as a TLR7 ligand for 18h, washed and incubated in fresh culture medium 6h. The second challenge with imiquimod R837 as a TLR7 ligand or Pam3CysSK4 as a TLR2 ligand resulted in reduced TNF-alpha production in TLR7 ligand-pretreated cells. There was impaired activation of NF-kappaB, p38 and stress-activated protein kinase (SAPK) in the tolerant cells. The expression of IRAK-M as a negative regulator of TLR signaling was markedly augmented in the tolerant cells while the interleukin-1 receptor-associated kinase (IRAK)-1 functioned normally. The involvement of IRAK-M in the TLR7-mediated tolerance is discussed.
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Affiliation(s)
- Ferdaus Hassan
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Yazako, Nagakute, Japan
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Khuda IIE, Koide N, Noman ASM, Dagvadorj J, Tumurkhuu G, Naiki Y, Komatsu T, Yoshida T, Yokochi T. Astrocyte elevated gene-1 (AEG-1) is induced by lipopolysaccharide as toll-like receptor 4 (TLR4) ligand and regulates TLR4 signalling. Immunology 2009; 128:e700-6. [PMID: 19740331 DOI: 10.1111/j.1365-2567.2009.03063.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Astrocyte elevated gene-1 (AEG-1) is induced by human immunodeficiency virus 1 (HIV-1) infection and involved in tumour progression, migration and invasion as a nuclear factor-kappaB (NF-kappaB) -dependent gene. The involvement of AEG-1 on lipopolysaccharide (LPS) -induced proinflammatory cytokine production was examined. AEG-1 was induced via NF-kappaB activation in LPS-stimulated U937 human promonocytic cells. AEG-1 induced by LPS subsequently regulated NF-kappaB activation. The prevention of AEG-1 expression inhibited LPS-induced tumour necrosis factor-alpha and prostaglandin E(2) production. The AEG-1 activation was not induced by toll-like receptor ligands other than LPS. Therefore, AEG-1 was suggested to be a LPS-responsive gene and involved in LPS-induced inflammatory response.
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Affiliation(s)
- Imtiaz I-E Khuda
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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Noman ASM, Koide N, Hassan F, I.-E-Khuda I, Dagvadorj J, Tumurkhuu G, Islam S, Naiki Y, Yoshida T, Yokochi T. Thalidomide inhibits lipopolysaccharide-induced tumor necrosis factor-α production via down-regulation of MyD88 expression. Innate Immun 2009; 15:33-41. [DOI: 10.1177/1753425908099317] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The effect of thalidomide on lipopolysaccharide (LPS)-induced tumor necrosis factor (TNF)-α production was studied by using RAW 264.7 murine macrophage-like cells. Thalidomide significantly inhibited LPS-induced TNF-α production. Thalidomide prevented the activation of nuclear factor (NF)-KB by down-regulating phosphorylation of inhibitory KB factor (IKB), and IKB kinase (IKK)-α and IKK-β Moreover, thalidomide inhibited LPS-induced phosphorylation of AKT, p38 and stress-activated protein kinase (SAPK)/JNK. The expression of myeloid differentiation factor 88 (MyD88) protein and mRNA was markedly reduced in thalidomide-treated RAW 264.7 cells but there was no significant alteration in the expression of interleukin-1 receptor-associated kinase (IRAK) 1 and TNF receptor-associated factor (TRAF) 6 in the cells. Thalidomide did not affect the cell surface expression of Toll-like receptor (TLR) 4 and CD14, suggesting the impairment of intracellular LPS signalling in thalidomide-treated RAW 264.7 cells. Thalidomide significantly inhibited the TNF-α production in response to palmitoyl-Cys(RS)-2,3-di(palmitoyloxy) propyl)-Ala-Gly-OH (Pam3Cys) as a MyD88-dependent TLR2 ligand. Therefore, it is suggested that thalidomide might impair LPS signalling via down-regulation of MyD88 protein and mRNA and inhibit LPS-induced TNF-α production. The putative mechanism of thalidomide-induced MyD88 down-regulation is discussed.
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Affiliation(s)
- Abu Shadat M. Noman
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Naoki Koide
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Ferdaus Hassan
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Imtiaz I.-E-Khuda
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Jargalsaikhan Dagvadorj
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Gantsetseg Tumurkhuu
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Shamima Islam
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Yoshikazu Naiki
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Tomoaki Yoshida
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Takashi Yokochi
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan,
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Islam S, Hassan F, Tumurkhuu G, Dagvadorj J, Koide N, Naiki Y, Yoshida T, Yokochi T. Receptor activator of nuclear factor-kappa B ligand induces osteoclast formation in RAW 264.7 macrophage cells via augmented production of macrophage-colony-stimulating factor. Microbiol Immunol 2008; 52:585-90. [DOI: 10.1111/j.1348-0421.2008.00076.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Noman ASM, Koide N, Khuda IIE, Dagvadorj J, Tumurkhuu G, Naiki Y, Komatsu T, Yoshida T, Yokochi T. Thalidomide inhibits epidermal growth factor-induced cell growth in mouse and human monocytic leukemia cells via Ras inactivation. Biochem Biophys Res Commun 2008; 374:683-7. [DOI: 10.1016/j.bbrc.2008.07.090] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2008] [Accepted: 07/18/2008] [Indexed: 12/16/2022]
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Dagvadorj J, Naiki Y, Tumurkhuu G, Hassan F, Islam S, Koide N, Mori I, Yoshida T, Yokochi T. Interleukin-10 inhibits tumor necrosis factor-α production in lipopolysaccharide-stimulated RAW 264.7 cells through reduced MyD88 expression. Innate Immun 2008; 14:109-15. [DOI: 10.1177/1753425908089618] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The mechanism of interleukin (IL)-10-mediated inhibition of tumor necrosis factor (TNF)-α production was studied by lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophage cells. IL-10 inhibited TNF-α production transiently at an early stage after LPS stimulation. IL-10 inhibited the activation of nuclear factor (NF)-κB, p38 and stress-activated protein kinase (SAPK) in LPS-stimulated RAW 264.7 cells. Although the level of MyD88 protein increased in response to LPS, IL-10 prevented the LPS-induced MyD88 augmentation. There was no significant difference in the MyD88 mRNA expression between the cells pretreated with or without IL-10 in response to LPS. Therefore, IL-10 was suggested to inhibit LPS-induced TNF-α production via reduced MyD88 expression.
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Affiliation(s)
- Jargalsaikhan Dagvadorj
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Yoshikazu Naiki
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Gantsetseg Tumurkhuu
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Ferdaus Hassan
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Shamima Islam
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Naoki Koide
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Isamu Mori
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Tomoaki Yoshida
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Takashi Yokochi
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan,
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Tumurkhuu G, Koide N, Dagvadorj J, Morikawa A, Hassan F, Islam S, Naiki Y, Mori I, Yoshida T, Yokochi T. The mechanism of development of acute lung injury in lethal endotoxic shock using alpha-galactosylceramide sensitization. Clin Exp Immunol 2008; 152:182-91. [PMID: 18307519 DOI: 10.1111/j.1365-2249.2008.03603.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The mechanism underlying acute lung injury in lethal endotoxic shock induced by administration of lipopolysaccharide (LPS) into alpha-galactosylceramide (alpha-GalCer)-sensitized mice was studied. Sensitization with alpha-GalCer resulted in the increase of natural killer T (NK T) cells and the production of interferon (IFN)-gamma in the lung. The IFN-gamma that was produced induced expression of adhesion molecules, especially vascular cell adhesion molecule-1 (VCAM-1), on vascular endothelial cells in the lung. Anti-IFN-gamma antibody inhibited significantly the VCAM-1 expression in alpha-GalCer-sensitized mice. Very late activating antigen-4-positive cells, as the counterpart of VCAM-1, accumulated in the lung. Anti-VCAM-1 antibody prevented LPS-mediated lethal shock in alpha-GalCer-sensitized mice. The administration of LPS into alpha-GalCer-sensitized mice caused local production of excessive proinflammatory mediators, such as tumour necrosis factor (TNF)-alpha, interleukin (IL)-1beta, IL-6 and nitric oxide. LPS caused microvascular leakage of proteins and cells into bronchoalveolar lavage fluid. Taken together, sensitization with alpha-GalCer was suggested to induce the expression of VCAM-1 via IFN-gamma produced by NK T cells and recruit a number of inflammatory cells into the lung. Further, LPS was suggested to lead to the production of excessive proinflammatory mediators, the elevation of pulmonary permeability and cell death. The putative mechanism of acute lung injury in LPS-mediated lethal shock using alpha-GalCer sensitization is discussed.
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Affiliation(s)
- G Tumurkhuu
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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Hassan F, Morikawa A, Islam S, Tumurkhuu G, Dagvadorj J, Koide N, Naiki Y, Mori I, Yoshida T, Yokochi T. Lipopolysaccharide augments the in vivo lethal action of doxorubicin against mice via hepatic damage. Clin Exp Immunol 2007; 151:334-40. [PMID: 18062793 DOI: 10.1111/j.1365-2249.2007.03568.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The effect of lipopolysaccharide (LPS) on the in vivo lethal action of doxorubicin (DOX) against mice was studied. DOX killed LPS-pretreated mice much earlier than untreated mice, and exhibited a stronger toxic action against LPS-pretreated mice. DOX-induced lethality in LPS-pretreated mice was due to severe hepatic damage, but there were no significant lesions in the heart, kidney and lung. Hepatic lesions were accompanied by caspase 3-positive cells and fragmented DNA-positive cells, suggesting the involvement of apoptosis. DOX induced the production of a high level of interferon (IFN)-gamma and tumour necrosis factor (TNF)-alpha in LPS-pretreated mice, but not in non-treated mice. The DOX-induced lethality was prevented significantly by anti-IFN-gamma antibody, but not anti-TNF-alpha antibody. Administration of recombinant IFN-gamma in place of LPS augmented definitively the DOX-induced lethality. LPS augmented the DOX-induced lethality in TNF-alpha-deficient mice. Taken together, LPS was suggested to enhance DOX-induced IFN-gamma production and augment the in vivo lethal action via hepatic damage.
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Affiliation(s)
- F Hassan
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan.
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Koide N, Morikawa A, Tumurkhuu G, Dagvadorj J, Hassan F, Islam S, Naiki Y, Mori I, Yoshida T, Yokochi T. Lipopolysaccharide and interferon-gamma enhance Fas-mediated cell death in mouse vascular endothelial cells via augmentation of Fas expression. Clin Exp Immunol 2007; 150:553-60. [PMID: 17900305 PMCID: PMC2219375 DOI: 10.1111/j.1365-2249.2007.03499.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The effect of interferon (IFN)-gamma and/or lipopolysaccharide (LPS) on Fas-mediated cell death with anti-Fas agonistic antibody in vascular endothelial cells was examined using a mouse END-D cell line. Anti-Fas agonistic antibody exhibited cytotoxic actions on END-D cells. Fas-mediated cell death was enhanced by LPS or IFN-gamma. The combination of IFN-gamma and LPS significantly enhanced cell death compared to IFN-gamma or LPS alone. IFN-gamma and LPS augmented cell surface expression of Fas, but not tumour necrosis factor (TNF) receptor 1. Inhibitors of p38 mitogen-activated protein kinase (MAPK) prevented augmentation of Fas expression in IFN-gamma and LPS-treated END-D cells. IFN-gamma and LPS-treated END-D cells did not become susceptible to TNF-alpha or nitric oxide-mediated cytotoxicity. IFN-gamma and LPS thus appear to augment selectively Fas expression via activation of p38 MAPK and enhance Fas-mediated cell death in END-D cells. Furthermore, administration of IFN-gamma and LPS into mice induced in vivo expression of Fas on vascular endothelial cells and Fas ligand (FasL) on peripheral blood leucocytes. The relationship between enhancement of Fas-mediated cell death by IFN-gamma and LPS and the development of vascular endothelial injury is discussed.
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Affiliation(s)
- N Koide
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan.
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Islam S, Hassan F, Tumurkhuu G, Dagvadorj J, Koide N, Naiki Y, Mori I, Yoshida T, Yokochi T. Bacterial lipopolysaccharide induces osteoclast formation in RAW 264.7 macrophage cells. Biochem Biophys Res Commun 2007; 360:346-51. [PMID: 17597583 DOI: 10.1016/j.bbrc.2007.06.023] [Citation(s) in RCA: 113] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2007] [Accepted: 06/06/2007] [Indexed: 11/18/2022]
Abstract
Lipopolysaccharide (LPS) is a potent bone resorbing factor. The effect of LPS on osteoclast formation was examined by using murine RAW 264.7 macrophage cells. LPS-induced the formation of multinucleated giant cells (MGC) in RAW 264.7 cells 3 days after the exposure. MGCs were positive for tartrate-resistant acid phosphatase (TRAP) activity. Further, MGC formed resorption pits on calcium-phosphate thin film that is a substrate for osteoclasts. Therefore, LPS was suggested to induce osteoclast formation in RAW 264.7 cells. LPS-induced osteoclast formation was abolished by anti-tumor necrosis factor (TNF)-alpha antibody, but not antibodies to macrophage-colony stimulating factor (M-CSF) and receptor activator of nuclear factor (NF)-kappaB ligand (RANKL). TNF-alpha might play a critical role in LPS-induced osteoclast formation in RAW 264.7 cells. Inhibitors of NF-kappaB and stress activated protein kinase (SAPK/JNK) prevented the LPS-induced osteoclast formation. The detailed mechanism of LPS-induced osteoclast formation is discussed.
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Affiliation(s)
- Shamima Islam
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi 480-1195, Japan
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Tumurkhuu G, Koide N, Dagvadorj J, Hassan F, Islam S, Naiki Y, Mori I, Yoshida T, Yokochi T. MnTBAP, a synthetic metalloporphyrin, inhibits production of tumor necrosis factor-α in lipopolysaccharide-stimulated RAW 264.7 macrophages cells via inhibiting oxidative stress-mediating p38 and SAPK/JNK signaling. ACTA ACUST UNITED AC 2007; 49:304-11. [PMID: 17227451 DOI: 10.1111/j.1574-695x.2006.00203.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Antioxidants are able to inhibit inflammatory gene expression in response to lipopolysaccharide via down-regulating generation of intracellular reactive oxygen species (ROS) as second messengers. The effect of manganese (III) tetrakis (4-benzoic acid) porphyrin (MnTBAP), a synthetic metalloporphyrin with antioxidant activity, on tumor necrosis factor (TNF)-alpha production in lipopolysaccharide-stimulated RAW 264.7 macrophage cells was examined. MnTBAP prevented the generation of intracellular ROS in lipopolysaccharide-stimulated RAW 264.7 cells and further inhibited lipopolysaccharide-induced TNF-alpha production. MnTBAP exclusively prevented the phosphorylation of p38 mitogen-activated protein kinase (MAPK) and stress-activated protein kinase (SAPK/JNK) whereas it did not affect the phosphorylation and activation of nuclear factor-kappaB and extracellular signal regulated kinase 1/2. MnTBAP was suggested to inhibit lipopolysaccharide-induced TNF-alpha production by the prevention of intracellular ROS generation and subsequent inactivation of p38 MAPK and SAPK/JNK.
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Affiliation(s)
- Gantsetseg Tumurkhuu
- Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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