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Spelat R, Ferro F, Contessotto P, Aljaabary A, Martin-Saldaña S, Jin C, Karlsson NG, Grealy M, Hilscher MM, Magni F, Chinello C, Kilcoyne M, Pandit A. Metabolic reprogramming and membrane glycan remodeling as potential drivers of zebrafish heart regeneration. Commun Biol 2022; 5:1365. [PMID: 36509839 PMCID: PMC9744865 DOI: 10.1038/s42003-022-04328-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 12/01/2022] [Indexed: 12/15/2022] Open
Abstract
The ability of the zebrafish heart to regenerate following injury makes it a valuable model to deduce why this capability in mammals is limited to early neonatal stages. Although metabolic reprogramming and glycosylation remodeling have emerged as key aspects in many biological processes, how they may trigger a cardiac regenerative response in zebrafish is still a crucial question. Here, by using an up-to-date panel of transcriptomic, proteomic and glycomic approaches, we identify a metabolic switch from mitochondrial oxidative phosphorylation to glycolysis associated with membrane glycosylation remodeling during heart regeneration. Importantly, we establish the N- and O-linked glycan structural repertoire of the regenerating zebrafish heart, and link alterations in both sialylation and high mannose structures across the phases of regeneration. Our results show that metabolic reprogramming and glycan structural remodeling are potential drivers of tissue regeneration after cardiac injury, providing the biological rationale to develop novel therapeutics to elicit heart regeneration in mammals.
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Affiliation(s)
- Renza Spelat
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland ,grid.5970.b0000 0004 1762 9868Neurobiology Sector, International School for Advanced Studies (SISSA), Trieste, Italy
| | - Federico Ferro
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland ,grid.5133.40000 0001 1941 4308Department of Medical Surgery and Health Science, University of Trieste, Trieste, Italy
| | - Paolo Contessotto
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland ,grid.5608.b0000 0004 1757 3470Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Amal Aljaabary
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland
| | - Sergio Martin-Saldaña
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland
| | - Chunsheng Jin
- grid.8761.80000 0000 9919 9582Department of Medical Biochemistry, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Niclas G. Karlsson
- grid.8761.80000 0000 9919 9582Department of Medical Biochemistry, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Maura Grealy
- Pharmacology and Therapeutics, School of Medicine, University of Galway, Galway, Ireland
| | - Markus M. Hilscher
- grid.10548.380000 0004 1936 9377Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
| | - Fulvio Magni
- grid.7563.70000 0001 2174 1754Clinical Proteomics and Metabolomics Unit, School of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro, Italy
| | - Clizia Chinello
- grid.7563.70000 0001 2174 1754Clinical Proteomics and Metabolomics Unit, School of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro, Italy
| | - Michelle Kilcoyne
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland ,Carbohydrate Signalling Group, Microbiology, School of Natural Sciences, University of Galway, Galway, Ireland
| | - Abhay Pandit
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland
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2
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Okubo K, Brenner MD, Cullere X, Saggu G, Patchen ML, Bose N, Mihori S, Yuan Z, Lowell CA, Zhu C, Mayadas TN. Inhibitory affinity modulation of FcγRIIA ligand binding by glycosphingolipids by inside-out signaling. Cell Rep 2021; 35:109142. [PMID: 34010642 PMCID: PMC8218468 DOI: 10.1016/j.celrep.2021.109142] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 01/19/2021] [Accepted: 04/26/2021] [Indexed: 12/22/2022] Open
Abstract
The interaction of the human FcγRIIA with immune complexes (ICs) promotes neutrophil activation and thus must be tightly controlled to avoid damage to healthy tissue. Here, we demonstrate that a fungal-derived soluble β-1,3/1,6-glucan binds to the glycosphingolipid long-chain lactosylceramide (LacCer) to reduce FcγRIIA-mediated recruitment to immobilized ICs under flow, a process requiring high-affinity FcγRIIA-immunoglobulin G (IgG) interactions. The inhibition requires Lyn phosphorylation of SHP-1 phosphatase and the FcγRIIA immunotyrosine-activating motif. β-glucan reduces the effective 2D affinity of FcγRIIA for IgG via Lyn and SHP-1 and, in vivo, inhibits FcγRIIA-mediated neutrophil recruitment to intravascular IgG deposited in the kidney glomeruli in a glycosphingolipid- and Lyn-dependent manner. In contrast, β-glucan did not affect FcγR functions that bypass FcγR affinity for IgG. In summary, we have identified a pathway for modulating the 2D affinity of FcγRIIA for ligand that relies on LacCer-Lyn-SHP-1-mediated inhibitory signaling triggered by β-glucan, a previously described activator of innate immunity. Okubo et al. demonstrate that β-glucan binding to the glycosphingolipid lactosylceramide engages a Lyn kinase to SHP-1 phosphatase pathway that reduces FcγRIIA binding propensity for IgG, which suggests FcγRIIA affinity regulation by “inside-out” signaling. The β-glucan-lactosylceramide-Lyn axis prevents FcγRIIA-dependent neutrophil recruitment in vitro and to intravascular IgG deposits following glomerulonephritis.
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Affiliation(s)
- Koshu Okubo
- Department of Pathology, Brigham and Women's Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Michael D Brenner
- Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Xavier Cullere
- Department of Pathology, Brigham and Women's Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Gurpanna Saggu
- Department of Pathology, Brigham and Women's Hospital & Harvard Medical School, Boston, MA 02115, USA
| | | | - Nandita Bose
- Biothera Pharmaceuticals, Inc., Eagan, Minnesota, MN 55121, USA
| | - Saki Mihori
- Department of Pathology, Brigham and Women's Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Zhou Yuan
- Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Clifford A Lowell
- Department of Laboratory Medicine, University of California, San Francisco, CA 94143, USA
| | - Cheng Zhu
- Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Tanya N Mayadas
- Department of Pathology, Brigham and Women's Hospital & Harvard Medical School, Boston, MA 02115, USA.
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3
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Marki A, Buscher K, Lorenzini C, Meyer M, Saigusa R, Fan Z, Yeh YT, Hartmann N, Dan JM, Kiosses WB, Golden GJ, Ganesan R, Winkels H, Orecchioni M, McArdle S, Mikulski Z, Altman Y, Bui J, Kronenberg M, Chien S, Esko JD, Nizet V, Smalley D, Roth J, Ley K. Elongated neutrophil-derived structures are blood-borne microparticles formed by rolling neutrophils during sepsis. J Exp Med 2021; 218:e20200551. [PMID: 33275138 PMCID: PMC7721910 DOI: 10.1084/jem.20200551] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 09/28/2020] [Accepted: 11/06/2020] [Indexed: 12/30/2022] Open
Abstract
Rolling neutrophils form tethers with submicron diameters. Here, we report that these tethers detach, forming elongated neutrophil-derived structures (ENDS) in the vessel lumen. We studied ENDS formation in mice and humans in vitro and in vivo. ENDS do not contain mitochondria, endoplasmic reticulum, or DNA, but are enriched for S100A8, S100A9, and 57 other proteins. Within hours of formation, ENDS round up, and some of them begin to present phosphatidylserine on their surface (detected by annexin-5 binding) and release S100A8-S100A9 complex, a damage-associated molecular pattern protein that is a known biomarker of neutrophilic inflammation. ENDS appear in blood plasma of mice upon induction of septic shock. Compared with healthy donors, ENDS are 10-100-fold elevated in blood plasma of septic patients. Unlike neutrophil-derived extracellular vesicles, most ENDS are negative for the tetraspanins CD9, CD63, and CD81. We conclude that ENDS are a new class of bloodborne submicron particles with a formation mechanism linked to neutrophil rolling on the vessel wall.
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Affiliation(s)
- Alex Marki
- La Jolla Institute for Immunology, La Jolla, CA
| | - Konrad Buscher
- La Jolla Institute for Immunology, La Jolla, CA
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Muenster, Muenster, Germany
| | - Cristina Lorenzini
- La Jolla Institute for Immunology, La Jolla, CA
- Laboratory of Immunobiology, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil
| | | | | | - Zhichao Fan
- La Jolla Institute for Immunology, La Jolla, CA
- Department of Immunology, University of Connecticut Health Center, Farmington, CT
| | - Yi-Ting Yeh
- Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, CA
| | | | - Jennifer M. Dan
- La Jolla Institute for Immunology, La Jolla, CA
- Division of Infectious Diseases and Global Public Health, University of California, San Diego, La Jolla, CA
| | | | - Gregory J. Golden
- Department of Cellular and Molecular Medicine and Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA
| | - Rajee Ganesan
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | | | | | | | | | - Yoav Altman
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Jack Bui
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | | | - Shu Chien
- Institute for Immunology, University of Muenster, Muenster, Germany
| | - Jeffrey D. Esko
- Department of Cellular and Molecular Medicine and Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA
| | - Victor Nizet
- Department of Pediatrics and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA
| | - David Smalley
- Systems Mass Spectrometry Core, Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA
| | - Johannes Roth
- Institute for Immunology, University of Muenster, Muenster, Germany
| | - Klaus Ley
- La Jolla Institute for Immunology, La Jolla, CA
- Department of Bioengineering and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA
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Wettschureck N, Strilic B, Offermanns S. Passing the Vascular Barrier: Endothelial Signaling Processes Controlling Extravasation. Physiol Rev 2019; 99:1467-1525. [PMID: 31140373 DOI: 10.1152/physrev.00037.2018] [Citation(s) in RCA: 150] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
A central function of the vascular endothelium is to serve as a barrier between the blood and the surrounding tissue of the body. At the same time, solutes and cells have to pass the endothelium to leave or to enter the bloodstream to maintain homeostasis. Under pathological conditions, for example, inflammation, permeability for fluid and cells is largely increased in the affected area, thereby facilitating host defense. To appropriately function as a regulated permeability filter, the endothelium uses various mechanisms to allow solutes and cells to pass the endothelial layer. These include transcellular and paracellular pathways of which the latter requires remodeling of intercellular junctions for its regulation. This review provides an overview on endothelial barrier regulation and focuses on the endothelial signaling mechanisms controlling the opening and closing of paracellular pathways for solutes and cells such as leukocytes and metastasizing tumor cells.
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Affiliation(s)
- Nina Wettschureck
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research , Bad Nauheim , Germany ; and Centre for Molecular Medicine, Medical Faculty, J.W. Goethe University Frankfurt , Frankfurt , Germany
| | - Boris Strilic
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research , Bad Nauheim , Germany ; and Centre for Molecular Medicine, Medical Faculty, J.W. Goethe University Frankfurt , Frankfurt , Germany
| | - Stefan Offermanns
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research , Bad Nauheim , Germany ; and Centre for Molecular Medicine, Medical Faculty, J.W. Goethe University Frankfurt , Frankfurt , Germany
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Nicholls AJ, Wen SW, Hall P, Hickey MJ, Wong CHY. Activation of the sympathetic nervous system modulates neutrophil function. J Leukoc Biol 2017; 103:295-309. [PMID: 29345350 PMCID: PMC6635748 DOI: 10.1002/jlb.3ma0517-194rr] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 10/04/2017] [Accepted: 12/06/2017] [Indexed: 01/19/2023] Open
Abstract
Emerging evidence has revealed that noradrenaline (NA), the main neurotransmitter of the sympathetic nervous system (SNS), regulates a variety of immune functions via binding to adrenergic receptors present on immune cells. In this study, we examined the role of NA in the regulation of neutrophil functions. Neutrophils were isolated from the bone marrow of naïve mice and treated with NA at various concentrations to assess the effect on various neutrophil functions. Additionally, we performed cremaster intravital microscopy to examine neutrophil‐endothelial cell interactions following NA superfusion in vivo. In a separate group of animals, mice were subjected to an experimental model of stroke and at 4 and 24 h neutrophils were isolated for assessment on their ability to migrate toward various chemokines. Treatment of neutrophils with NA for 4 h significantly impaired neutrophil chemotaxis and induced an N2 neutrophil phenotype with reduced expression of the genes critical for cytoskeleton remodeling and inflammation. Prolonged NA administration promoted neutrophils to release myeloperoxidase and IL‐6, but suppressed the production of interferon‐γ and IL‐10, reduced neutrophil activation and phagocytosis. Superfusion of NA over the cremaster muscle almost completely inhibited fMLP‐induced neutrophil adhesion/arrest and transmigration. Furthermore, using a mouse model of stroke, a pathological condition in which SNS activation is evident, neutrophils isolated from poststroke mice showed markedly reduced chemotaxis toward all of the chemokines tested. The findings from our study indicate that neutrophil chemotaxis, activation, and phagocytosis can all be negatively regulated in an NA‐dependent manner. A better understanding of the relationship between sympathetic activation and neutrophil function will be important for the development of effective antibacterial interventions.
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Affiliation(s)
- Alyce J Nicholls
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences at Monash Health, Monash University, Australia
| | - Shu Wen Wen
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences at Monash Health, Monash University, Australia
| | - Pam Hall
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences at Monash Health, Monash University, Australia
| | - Michael J Hickey
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences at Monash Health, Monash University, Australia
| | - Connie H Y Wong
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences at Monash Health, Monash University, Australia
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6
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Chen X, Kezic JM, Forrester JV, Goldberg GL, Wicks IP, Bernard CC, McMenamin PG. In vivo multi-modal imaging of experimental autoimmune uveoretinitis in transgenic reporter mice reveals the dynamic nature of inflammatory changes during disease progression. J Neuroinflammation 2015; 12:17. [PMID: 25623142 PMCID: PMC4336748 DOI: 10.1186/s12974-015-0235-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 01/05/2015] [Indexed: 12/22/2022] Open
Abstract
Background Experimental autoimmune uveoretinitis (EAU) is a widely used experimental animal model of human endogenous posterior uveoretinitis. In the present study, we performed in vivo imaging of the retina in transgenic reporter mice to investigate dynamic changes in exogenous inflammatory cells and endogenous immune cells during the disease process. Methods Transgenic mice (C57Bl/6 J Cx3cr1GFP/+, C57Bl/6 N CD11c-eYFP, and C57Bl/6 J LysM-eGFP) were used to visualize the dynamic changes of myeloid-derived cells, putative dendritic cells and neutrophils during EAU. Transgenic mice were monitored with multi-modal fundus imaging camera over five time points following disease induction with the retinal auto-antigen, interphotoreceptor retinoid binding protein (IRBP1–20). Disease severity was quantified with both clinical and histopathological grading. Results In the normal C57Bl/6 J Cx3cr1GFP/+ mouse Cx3cr1-expressing microglia were evenly distributed in the retina. In C57Bl/6 N CD11c-eYFP mice clusters of CD11c-expressing cells were noted in the retina and in C57Bl/6 J LysM-eGFP mice very low numbers of LysM-expressing neutrophils were observed in the fundus. Following immunization with IRBP1–20, fundus examination revealed accumulations of Cx3cr1-GFP+ myeloid cells, CD11c-eYFP+ cells and LysM-eGFP+ myelomonocytic cells around the optic nerve head and along retinal vessels as early as day 14 post-immunization. CD11c-eYFP+ cells appear to resolve marginally earlier (day 21 post-immunization) than Cx3cr1-GFP+ and LysM-eGFP+ cells. The clinical grading of EAU in transgenic mice correlated closely with histopathological grading. Conclusions These results illustrate that in vivo fundus imaging of transgenic reporter mice allows direct visualization of various exogenously and endogenously derived leukocyte types during EAU progression. This approach acts as a valuable adjunct to other methods of studying the clinical course of EAU. Electronic supplementary material The online version of this article (doi:10.1186/s12974-015-0235-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiangting Chen
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton, Victoria, Australia.
| | - Jelena M Kezic
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton, Victoria, Australia.
| | - John V Forrester
- Section of Immunology and Infection, Division of Applied Medicine, School of Medicine and Dentistry, Institute of Medical Science, Foresterhill, University of Aberdeen, Scotland, UK. .,Ocular Immunology Program, Centre for Ophthalmology and Visual Science, The University of Western Australia, Crawley, Western Australia, Australia. .,Centre for Experimental Immunology, Lions Eye Institute, Nedlands, Crawley, Western Australia, Australia.
| | - Gabrielle L Goldberg
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.
| | - Ian P Wicks
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.
| | - Claude C Bernard
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia.
| | - Paul G McMenamin
- Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton, Victoria, Australia.
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Chow Z, Mueller SN, Deane JA, Hickey MJ. Dermal regulatory T cells display distinct migratory behavior that is modulated during adaptive and innate inflammation. THE JOURNAL OF IMMUNOLOGY 2013; 191:3049-56. [PMID: 23940277 DOI: 10.4049/jimmunol.1203205] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Regulatory T cells (Tregs) are important in controlling skin inflammation, an effect dependent on their ability to home to this organ. However, little is known regarding their behavior in the skin. In this study, we used multiphoton imaging in Foxp3-GFP mice to examine the behavior of endogenous Tregs in resting and inflamed skin. Although Tregs were readily detectable in the uninflamed dermis, most were nonmotile. Induction of contact sensitivity increased the proportion of motile Tregs, and also induced Treg recruitment. This response was significantly blunted in mice challenged with an irrelevant hapten, or by inhibition of effector cell recruitment, indicating a role for T cell-dependent inflammation in induction of Treg migration. Moreover, induction of Treg migration was inhibited by local injection of a CCR4 antagonist, indicating a role for CCR4 in this response. Exposure of naive mice to hapten also induced an increase in the proportion of migratory Tregs, demonstrating that innate signals can also induce Treg migration. Simultaneous examination of the migration of CD4⁺ effector cells and Tregs in the same region of uninflamed skin demonstrated that effector cells behaved differently, being uniformly highly migratory. These findings indicate that Treg behavior in skin differs from that of CD4⁺ effector cells, in that only a low proportion of Tregs is migratory under resting conditions. However, in response to both adaptive and innate inflammation, the proportion of migratory Tregs increases, raising the possibility that this response is important in multiple forms of skin inflammation.
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Affiliation(s)
- Zachary Chow
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
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Rollet-Labelle E, Vaillancourt M, Marois L, Newkirk MM, Poubelle PE, Naccache PH. Cross-linking of IgGs bound on circulating neutrophils leads to an activation of endothelial cells: possible role of rheumatoid factors in rheumatoid arthritis-associated vascular dysfunction. J Inflamm (Lond) 2013; 10:27. [PMID: 23902799 PMCID: PMC3734015 DOI: 10.1186/1476-9255-10-27] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 07/25/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Rheumatoid arthritis is characterized by the presence of circulating auto-antibodies, including rheumatoid factors, which recognize the Fc portion of IgGs. The neutrophil is the most abundant circulating leukocyte and it expresses high levels of FcγRs on its surface. The aim of the present study was to examine the capacity of circulating human neutrophils to be activated by rheumatoid factors and the consequences of these events on endothelium. METHODS Neutrophil-bound IgGs were cross-linked with anti-human IgGs to mimick the presence of circulating rheumatoid factors and FcγRs-dependent signalling events and functions were examined. The IgG and IgM composition of rheumatoid factors isolated from the serum of RA patients was characterized. Adhesion of neutrophils to endothelial cells was quantified in response to the addition of rheumatoid factors. RESULTS Cross-linking of IgGs bound on neutrophils leads to FcγRs-dependent tyrosine phosphorylation, mobilisation of intracellular calcium and the extracellular release of superoxide anions and lysozyme. Incubation of endothelial cells with the supernatant of activated neutrophils increases ICAM-1 expression and IL-8 production by endothelial cells. Finally, rheumatoid factors enhance neutrophil adhesion to endothelial cells. CONCLUSIONS Our results show that activation of neutrophils' FcγRs by rheumatoid factors could participate in rheumatoid arthritis-associated vascular damage.
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Affiliation(s)
- Emmanuelle Rollet-Labelle
- Départements de Microbiologie-Infectiologie et Immunologie et de Médecine, Centre de recherche en rhumatologie et immunologie, Centre de recherche du CHU de Québec, Université Laval, Québec, QC, Canada
| | - Myriam Vaillancourt
- Départements de Microbiologie-Infectiologie et Immunologie et de Médecine, Centre de recherche en rhumatologie et immunologie, Centre de recherche du CHU de Québec, Université Laval, Québec, QC, Canada
| | - Louis Marois
- Départements de Microbiologie-Infectiologie et Immunologie et de Médecine, Centre de recherche en rhumatologie et immunologie, Centre de recherche du CHU de Québec, Université Laval, Québec, QC, Canada
| | - Marianna M Newkirk
- Department of Medicine, Division of Rheumatology, Research Institute of McGill University Health Centre, McGill University, Montreal, QC, Canada
| | - Patrice E Poubelle
- Départements de Microbiologie-Infectiologie et Immunologie et de Médecine, Faculté de médecine, Université Laval, Québec, QC, Canada
| | - Paul H Naccache
- Départements de Microbiologie-Infectiologie et Immunologie et de Médecine, Centre de recherche en rhumatologie et immunologie, Centre de recherche du CHU de Québec, Université Laval, Québec, QC, Canada
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9
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Multiphoton imaging reveals a new leukocyte recruitment paradigm in the glomerulus. Nat Med 2012; 19:107-12. [PMID: 23242472 DOI: 10.1038/nm.3024] [Citation(s) in RCA: 137] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 06/13/2012] [Indexed: 12/12/2022]
Abstract
In contrast with many capillary beds, the glomerulus readily supports leukocyte recruitment. However, little is known regarding the actions of leukocytes following their recruitment to glomeruli. We used multiphoton confocal microscopy to examine leukocyte behavior in the glomerular microvasculature. In normal glomeruli, neutrophils and monocytes were retained in capillaries for several minutes, remaining static or migrating intravascularly. Induction of glomerular inflammation resulted in an increase in the duration of retention of static and migratory leukocytes. In response to immune complex deposition, both static and migratory neutrophils generated oxidants in inflamed glomeruli via a Mac-1-dependent mechanism. Our results describe a new paradigm for glomerular inflammation, suggesting that the major effect of acute inflammation is to increase the duration of leukocyte retention in the glomerulus. Moreover, these findings describe a previously unknown form of multicellular intravascular patrolling that involves both monocytes and neutrophils, which may underlie the susceptibility of the glomerulus to inflammation.
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10
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Rosetti F, Tsuboi N, Chen K, Nishi H, Ernandez T, Sethi S, Croce K, Stavrakis G, Alcocer-Varela J, Gómez-Martin D, van Rooijen N, Kyttaris VC, Lichtman AH, Tsokos GC, Mayadas TN. Human lupus serum induces neutrophil-mediated organ damage in mice that is enabled by Mac-1 deficiency. THE JOURNAL OF IMMUNOLOGY 2012; 189:3714-23. [PMID: 22933624 DOI: 10.4049/jimmunol.1201594] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Systemic lupus erythematosus (SLE) is a chronic, multiorgan inflammatory autoimmune disorder associated with high levels of circulating autoantibodies and immune complexes. We report that passive transfer of human SLE sera into mice expressing the uniquely human FcγRIIA and FcγRIIIB on neutrophils induces lupus nephritis and in some cases arthritis only when the mice additionally lack the CD18 integrin, Mac-1. The prevailing view is that Mac-1 on macrophages is responsible for immune complex clearance. However, disease permitted by the absence of Mac-1 is not related to enhanced renal immune complex deposition or in situ C1q/C3 complement activation and proceeds even in the absence of macrophages. Instead, disease is associated with increased FcγRIIA-induced neutrophil accumulation that is enabled by Mac-1 deficiency. Intravital microscopy in the cremasteric vasculature reveals that Mac-1 mitigates FcγRIIA-dependent neutrophil recruitment in response to deposited immune complexes. Our results provide direct evidence that human SLE immune complexes are pathogenic, demonstrate that neutrophils are primary mediators of end organ damage in a novel humanized lupus mouse model, and identify Mac-1 regulation of FcγRIIA-mediated neutrophil recruitment as a key step in development of target organ damage.
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Affiliation(s)
- Florencia Rosetti
- Department of Pathology, Center for Excellence in Vascular Biology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
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11
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Long-Term Follow up of the Effects of Extracorporeal Shockwave Therapy (ESWT) on Microcirculation in a Denervated Muscle Flap. POLISH JOURNAL OF SURGERY 2011; 83:325-33. [DOI: 10.2478/v10035-011-0050-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Gregory JL, Hall P, Leech M, Morand EF, Hickey MJ. Independent roles of macrophage migration inhibitory factor and endogenous, but not exogenous glucocorticoids in regulating leukocyte trafficking. Microcirculation 2010; 16:735-48. [PMID: 19905972 DOI: 10.3109/10739680903210421] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
OBJECTIVES Macrophage migration inhibitory factor (MIF) promotes leukocyte recruitment and antagonizes the anti-inflammatory effects of glucocorticoids (GC). The aim of this study was to examine whether interaction between MIF and GC underlies the ability of MIF to promote leukocyte-endothelial cell (EC) interactions. METHODS Intravital microscopy was used to assess leukocyte-EC interactions in wild-type and MIF(-/-) mice following treatment with lipopolysaccharide (LPS), the GC dexamethasone, and inhibition of endogenous GC, using the GC-receptor antagonist, RU486. RESULTS Dexamethasone reduced LPS-induced leukocyte interactions in wild-type mice to levels similar to those observed in MIF(-/-) mice not treated with dexamethasone, whereas in MIF(-/-) mice, leukocyte interactions were not further inhibited by dexamethasone. RU486 increased LPS-induced leukocyte adhesion and emigration to a similar extent in both wild-type and MIF(-/-) mice, indicating that endogenous GC exert a similar inhibitory effect on leukocyte trafficking in wild-type and MIF(-/-) mice. Both MIF deficiency and RU486 treatment reduced VCAM-1 expression, while neither treatment modulated expression of ICAM-1 or chemokines CCL2, KC, and MIP-2. CONCLUSIONS These results suggest that endogenous MIF and GC regulate leukocyte-EC interactions in vivo reciprocally but through predominantly independent mechanisms, and that the anti-inflammatory effect of MIF deficiency is comparable to that of exogenous GC.
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Affiliation(s)
- Julia L Gregory
- Monash University Department of Medicine, Monash Medical Center, Clayton, Victoria, Australia
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Mayadas TN, Tsokos GC, Tsuboi N. Mechanisms of immune complex-mediated neutrophil recruitment and tissue injury. Circulation 2009; 120:2012-24. [PMID: 19917895 DOI: 10.1161/circulationaha.108.771170] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Tanya N Mayadas
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.
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14
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Sunderkötter C. Vasculitis of small blood vessels - some riddles about IgA and about the complexity of transmigration. Exp Dermatol 2009; 18:91-6. [DOI: 10.1111/j.1600-0625.2008.00791.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Tsuboi N, Asano K, Lauterbach M, Mayadas TN. Human neutrophil Fcgamma receptors initiate and play specialized nonredundant roles in antibody-mediated inflammatory diseases. Immunity 2008; 28:833-46. [PMID: 18538590 PMCID: PMC2577844 DOI: 10.1016/j.immuni.2008.04.013] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2007] [Revised: 02/22/2008] [Accepted: 04/01/2008] [Indexed: 01/13/2023]
Abstract
Inflammation mediated by antibody-antigen complexes contributes to autoimmune diseases. Mice deficient in the common Fcgamma-chain are protected from IgG-mediated glomerulonephritis and the reverse passive Arthus (RPA) reaction and FcR-bearing macrophages, and mast cells have been assigned primary roles in these processes. Here we demonstrate that neutrophil-selective transgenic expression of the two uniquely human neutrophil Fc gamma receptors (FcgammaRs), FcgammaRIIA and FcgammaRIIIB, in Fcgamma-chain-deficient mice restored susceptibility to progressive glomerulonephritis and the cutaneous RPA reaction. FcgammaRIIIB and FcgammaRIIA mediated neutrophil accumulation, whereas FcgammaRIIA alone promoted organ injury. In a model of soluble immune complexes deposited within the vasculature, FcgammaRIIIB was responsible for neutrophil slow rolling and adhesion whereas in the cremaster RPA, induced by both vascular and tissue soluble immune complexes, FcgammaRIIA predominated. Thus, human FcgammaRs on neutrophils serve as molecular links between antibody and immunological disease, with FcgammaRIIA promoting tissue injury and FcgammaRIIIB and FcgammaRIIA displaying specialized context-dependent functions in neutrophil recruitment.
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Affiliation(s)
- Naotake Tsuboi
- Center of Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
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16
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Sumagin R, Sarelius IH. A role for ICAM-1 in maintenance of leukocyte-endothelial cell rolling interactions in inflamed arterioles. Am J Physiol Heart Circ Physiol 2007; 293:H2786-98. [PMID: 17704289 DOI: 10.1152/ajpheart.00720.2007] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A key endothelial receptor in leukocyte-endothelial cell (EC) interactions is ICAM-1. ICAM-1 is constitutively expressed at low levels on vascular ECs, and its levels significantly increase following stimulation with many proinflammatory agents. This study provides evidence that in inflamed arterioles of anesthetized mice (65 mg/kg ip Nembutal), ICAM-1 mediates leukocyte rolling, in contrast to its expected role of mediating firm adhesion in venules. The number of leukocytes rolling on arteriolar ECs is decreased in ICAM-1 knockout (KO) compared with wild-type (WT) mice (KO, 6.0 +/- 0.9; WT, 12.0 +/- 1.0 leukocytes/40 s; P < 0.05), whereas the leukocyte-rolling number in venules remains unaffected (KO, 5.6 +/- 0.9; WT, 7.0 +/- 0.7 leukocytes/40 s; n = 13-15 sites). We also show that the fraction of leukocytes that is rolling on arteriolar ECs does so with a higher characteristic velocity (>70 microm/s), and, furthermore, that the distance over which rolling contacts with the arteriolar wall are maintained is ICAM-1 dependent. In ICAM-1 KO animals or in WT mice in the presence of ICAM-1-blocking antibody, leukocytes rolled significantly shorter distances over the sampled 200-microm vessel length compared with WT (68 +/- 6.7 and 55 +/- 9.4 vs. 85 +/- 12.9% total, respectively, n = 4 sites, P < 0.05). We also found evidence that in ICAM-1 KO mice, a significant fraction of leukocyte rolling and adhesive interactions with arteriolar ECs could be accounted for by upregulation of another adhesion molecule, VCAM-1, providing an important illustration of how expression of related proteins can be altered following genetic ablatement of a target molecule (in this case ICAM-1).
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Affiliation(s)
- Ronen Sumagin
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY 14642, USA
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17
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Kelly M, Hwang JM, Kubes P. Modulating leukocyte recruitment in inflammation. J Allergy Clin Immunol 2007; 120:3-10. [PMID: 17559914 DOI: 10.1016/j.jaci.2007.05.017] [Citation(s) in RCA: 150] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2007] [Revised: 05/17/2007] [Accepted: 05/18/2007] [Indexed: 12/12/2022]
Abstract
Much information has been obtained regarding how white cells are recruited in the microcirculation to sites of inflammation. In this review we summarize the leukocyte recruitment cascade, highlighting the molecular mechanisms that underlie each of the major steps. Major emphasis is placed on the selectins and integrins and their role in rolling and adhesion. Intraluminal crawling and emigration are also briefly discussed. In addition, we summarize some of the data that implicate these molecules in eosinophil recruitment in animal models of asthma and in lymphocyte recruitment in skin contact sensitivity. There is a growing body of evidence to suggest that leukocyte recruitment could be used as an effective means for future therapeutics, and some of these issues are also raised.
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Affiliation(s)
- Margaret Kelly
- Department of Pathology, Institute of Infection, Immunity and Inflammation, University of Calgary, Calgary, Alberta, Canada
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19
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Orito H, Fujimoto M, Ishiura N, Yanaba K, Matsushita T, Hasegawa M, Ogawa F, Takehara K, Sato S. Intercellular adhesion molecule-1 and vascular cell adhesion molecule-1 cooperatively contribute to the cutaneous Arthus reaction. J Leukoc Biol 2007; 81:1197-204. [PMID: 17299025 DOI: 10.1189/jlb.1006623] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Immune complex (IC)-induced inflammation is mediated by inflammatory cell infiltration, a process that is highly regulated by expression of multiple adhesion molecules. The roles and interactions of ICAM-1 and VCAM-1, the major regulators of leukocyte firm adhesion, were examined in the cutaneous reverse-passive Arthus reaction using ICAM-1-deficient (ICAM-1-/-) mice and blocking mAb against VCAM-1. Within 8 h, IC challenge of wild-type mice induced edema, hemorrhage, interstitial accumulation of neutrophils and mast cells, as well as production of TNF-alpha and IL-6. All of these inflammatory parameters were reduced significantly in ICAM-1-/- mice. The blockade of VCAM-1 in wild-type mice did not affect any inflammatory parameters. In contrast, ICAM-1-/- mice treated with anti-VCAM-1 mAb had significantly reduced edema, hemorrhage, and neutrophil infiltration. Furthermore, VCAM-1 blockade in ICAM-1-/- mice suppressed cutaneous TNF-alpha and IL-6 production. Thus, VCAM-1 plays a complementary role to ICAM-1 in the cutaneous Arthus reaction by regulating leukocyte accumulation and proinflammatory cytokine production.
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Affiliation(s)
- Hidemitsu Orito
- Department of Dermatology, Kanazawa University Graduate School of Medical Science, 13-1 Takaramachi, Kanazawa, Ishikawa 920-8641, Japan
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20
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Sindrilaru A, Seeliger S, Ehrchen JM, Peters T, Roth J, Scharffetter-Kochanek K, Sunderkötter CH. Site of blood vessel damage and relevance of CD18 in a murine model of immune complex-mediated vasculitis. J Invest Dermatol 2006; 127:447-54. [PMID: 17008881 DOI: 10.1038/sj.jid.5700563] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
How neutrophils (polymorphonuclear neutrophils, PMNs) damage vessels in leukocytoclastic vasculitis (LcV) mediated by immune complexes (ICs) is unclear. If degradative enzymes and oxygen radicals are released from PMNs while adhering to the inner side of the vessel wall, they could be washed away by the blood stream or neutralized by serum protease inhibitors. We investigated if in LcV PMNs could damage vessels from the tissue side after transmigration. We used CD18-deficient (CD18-/-) mice because the absence of CD18 excludes transmigration of PMNs. When eliciting the Arthus reaction in ears of CD18-/- mice, deposition of ICs was not sufficient to recruit PMNs or to induce IC-mediated LcV. Injection of PMNs intradermally in CD18-/- mice allowed us to investigate if bypassing diapedesis and placing PMNs exclusively on the abluminal side leads to vascular destruction. We found that injected PMNs gathered around perivascular ICs, but did not cause vessel damage. Only intravenous injection of wild-type PMNs could re-establish the Arthus reaction in CD18-/- mice. Thus, PMNs cause vessel damage during diapedesis from the luminal side, but not from the perivascular space. We suggest that in order to shield the cytotoxic products from the blood stream, ICs induce particularly tight interactions between them, PMNs and endothelial cells.
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Affiliation(s)
- Anca Sindrilaru
- Institute of Experimental Dermatology, University Hospital Münster, Münster, Germany
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21
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Lister KJ, Hickey MJ. Immune complexes alter cerebral microvessel permeability: roles of complement and leukocyte adhesion. Am J Physiol Heart Circ Physiol 2006; 291:H694-704. [PMID: 16565304 DOI: 10.1152/ajpheart.01271.2005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Immune complexes (ICs) are potent inflammatory mediators in peripheral tissues. However, very few studies have examined the ability of ICs to induce inflammatory responses in the brain. Therefore, using preformed ICs or the reverse passive Arthus (RPA) model to localize ICs to the pial microvasculature of mice, we aimed to investigate the ability of ICs to induce an inflammatory response in the cerebral (pial) microvasculature. Application of preformed ICs immediately increased pial microvascular permeability, with a minimal change in leukocyte adhesion in pial postcapillary venules. In contrast, initiation of the RPA response in the pial microvasculature induced changes in cerebral microvascular permeability and increased leukocyte adhesion in pial postcapillary venules. The RPA response induced deposition of C3 in perivascular regions adjacent to sites of IC formation. Depletion of C3 abrogated RPA-induced microvascular permeability and leukocyte adhesion, indicating that the complement pathway was critical for this response. Inhibition of leukocyte adhesion via CD18 blockade also reduced IC-induced microvascular permeability. However, this did not require intercellular adhesion molecule-1, inasmuch as blockade of intercellular adhesion molecule-1 did not alter RPA-induced microvascular permeability and adhesion. These findings demonstrate that ICs are capable of rapidly inducing inflammatory responses in the cerebral microvasculature, with the complement pathway and leukocyte recruitment playing critical roles in microvascular dysfunction.
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Affiliation(s)
- Karyn J Lister
- Department of Medicine and Monash Institute of Medical Research, Monash University, Victoria, Australia
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22
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Kuligowski MP, Kitching AR, Hickey MJ. Leukocyte recruitment to the inflamed glomerulus: a critical role for platelet-derived P-selectin in the absence of rolling. THE JOURNAL OF IMMUNOLOGY 2006; 176:6991-9. [PMID: 16709860 DOI: 10.4049/jimmunol.176.11.6991] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The renal glomerulus is one of the few sites within the microvasculature in which leukocyte recruitment occurs in capillaries. However, due to the difficulty of directly visualizing the glomerulus, the mechanisms of leukocyte recruitment to glomerular capillaries are poorly understood. To overcome this, we rendered murine kidneys hydronephrotic to allow the visualization of the functional glomerular microvasculature during an inflammatory response. These experiments demonstrated that following infusion of anti-glomerular basement membrane (GBM) Ab, leukocytes became adherent in glomerular capillaries via a process of immediate arrest, without undergoing prior detectable rolling. However, despite the absence of rolling, this recruitment involved nonredundant roles for the P-selectin/P-selectin glycoprotein ligand-1 and beta2 integrin/ICAM-1 pathways, suggesting that a novel form of the multistep leukocyte adhesion cascade occurs in these vessels. Anti-GBM Ab also increased glomerular P-selectin expression and induced a P-selectin-independent increase in platelet accumulation. Moreover, platelet depletion prevented both the increase in glomerular P-selectin, and the leukocyte recruitment induced by anti-GBM Ab. Furthermore, depletion of neutrophils and platelets also prevented the increase in urinary protein excretion induced by anti-GBM Ab, indicating that their accumulation in glomeruli contributed to the development of renal injury. Finally, infusion of wild-type platelets into P-selectin-deficient mice restored the ability of glomeruli in these mice to support leukocyte adhesion. Together, these data indicate that anti-GBM Ab-induced leukocyte adhesion in glomeruli occurs via a novel pathway involving a nonrolling interaction mediated by platelet-derived P-selectin.
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Affiliation(s)
- Michael P Kuligowski
- Centre for Inflammatory Diseases, Department of Medicine, Monash Institute of Medical Research, Monash University, Clayton, Victoria, Australia
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23
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Aurrand-Lions M, Lamagna C, Dangerfield JP, Wang S, Herrera P, Nourshargh S, Imhof BA. Junctional adhesion molecule-C regulates the early influx of leukocytes into tissues during inflammation. THE JOURNAL OF IMMUNOLOGY 2005; 174:6406-15. [PMID: 15879142 DOI: 10.4049/jimmunol.174.10.6406] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Leukocyte recruitment from blood to inflammatory sites occurs in a multistep process that involves discrete molecular interactions between circulating and endothelial cells. Junctional adhesion molecule (JAM)-C is expressed at different levels on endothelial cells of lymphoid organs and peripheral tissues and has been proposed to regulate neutrophil migration by its interaction with the leukocyte integrin Mac-1. In the present study, we show that the accumulation of leukocytes in alveoli during acute pulmonary inflammation in mice is partially blocked using neutralizing Abs against JAM-C. To confirm the function of JAM-C in regulating leukocyte migration in vivo, we then generated a strain of transgenic mice overexpressing JAM-C under the control of the endothelial specific promotor Tie2. The transgenic animals accumulate more leukocytes to inflammatory sites compared with littermate control mice. Intravital microscopy shows that this is the result of increased leukocyte adhesion and transmigration, whereas rolling of leukocytes is not significantly affected in transgenic mice compared with littermates. Thus, JAM-C participates in the later steps of the leukoendothelial adhesion cascade.
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Affiliation(s)
- Michel Aurrand-Lions
- Department of Pathology and Immunology, Medical University Center, Geneva, Switzerland.
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24
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Westra J, Kułdo JM, van Rijswijk MH, Molema G, Limburg PC. Chemokine production and E-selectin expression in activated endothelial cells are inhibited by p38 MAPK (mitogen activated protein kinase) inhibitor RWJ 67657. Int Immunopharmacol 2005; 5:1259-69. [PMID: 15914330 DOI: 10.1016/j.intimp.2005.03.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2005] [Revised: 02/09/2005] [Accepted: 03/09/2005] [Indexed: 11/22/2022]
Abstract
Endothelial cells play an important role in inflammatory diseases like rheumatoid arthritis by recruitment of inflammatory cells. The cytokines TNF-alpha and IL-1beta are major inducers of endothelial cell activation and are stimulators of inflammatory signal transduction pathway involving p38 MAPK (mitogen-activated protein kinase). The present study investigated the effects of p38 MAPK inhibition on cell adhesion molecule (CAM) expression and chemokine production by endothelial cells both on mRNA and protein level. Pre-treatment of endothelial cells with the pharmacologically relevant concentration of 1 microM of the p38 MAPK inhibitor RWJ 67657 reduced TNF-alpha and IL-1beta induced mRNA and membrane expression of E-selectin. Moderate inhibitory effects on ICAM-1 and VCAM-1 expression were found. Significant reduction of mRNA expression and protein production of the inflammatory cytokine IL-6 and the chemokines IL-8 and MCP-1 was demonstrated. Treatment with RWJ 67657 could lead to reduced leukocyte infiltration by the reduction of E-selectin expression and chemokine production.
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Affiliation(s)
- Johanna Westra
- Department of Rheumatology, University Medical Centre Groningen, The Netherlands.
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25
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Norman MU, Lister KJ, Yang YH, Issekutz A, Hickey MJ. TNF regulates leukocyte-endothelial cell interactions and microvascular dysfunction during immune complex-mediated inflammation. Br J Pharmacol 2005; 144:265-74. [PMID: 15655512 PMCID: PMC1576001 DOI: 10.1038/sj.bjp.0706081] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
1. The aim of this study was to assess directly the role of TNF in immune complex-induced leukocyte-endothelial cell interactions and microvascular dysfunction. 2. Intravital microscopy was used to examine immune complex-induced leukocyte rolling, adhesion and emigration and microvascular permeability in cremasteric postcapillary venules in wild-type and TNF(-/-) mice. The reverse passive Arthus (RPA) reaction was used to localize immune complex formation to the cremaster muscle. 3. In wild-type mice, immune complex deposition induced a reduction in leukocyte rolling velocity and increases in leukocyte adhesion and emigration. In TNF(-/-) mice, the immune complex-induced reduction in leukocyte rolling velocity was significantly attenuated, and leukocyte adhesion and emigration were also significantly reduced relative to responses in wild-type mice. 4. The alterations in TNF(-/-) mice were associated with decreased expression of endothelial P-selectin and VCAM-1, and an absence of E-selectin-dependent rolling normally seen in wild-type mice at the peak of the response. In addition, the level of immune complex-induced microvascular permeability was attenuated in TNF(-/-) mice. 5. These findings demonstrate that in immune complex-induced inflammation, TNF promotes leukocyte rolling and adhesive interactions, and entry of leukocytes into sites of immune complex deposition, in part via the increased expression and/or function of endothelial P-selectin, E-selectin and VCAM-1. In addition, this increase in leukocyte recruitment mediated by TNF correlates directly with an increase in microvascular injury.
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Affiliation(s)
- M Ursula Norman
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, 246 Clayton Road, Clayton, Vic., 3168, Australia
| | - Karyn J Lister
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, 246 Clayton Road, Clayton, Vic., 3168, Australia
| | - Yuan H Yang
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, 246 Clayton Road, Clayton, Vic., 3168, Australia
| | - Andrew Issekutz
- Departments of Pediatrics, Microbiology-Immunology and Pathology, Dalhousie University, Halifax, NS, Canada
| | - Michael J Hickey
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, 246 Clayton Road, Clayton, Vic., 3168, Australia
- Author for correspondence:
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Stokol T, O'Donnell P, Xiao L, Knight S, Stavrakis G, Botto M, von Andrian UH, Mayadas TN. C1q governs deposition of circulating immune complexes and leukocyte Fcgamma receptors mediate subsequent neutrophil recruitment. ACTA ACUST UNITED AC 2004; 200:835-46. [PMID: 15466618 PMCID: PMC2213287 DOI: 10.1084/jem.20040501] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Inflammation induced by circulating immunoglobulin G–immune complexes (ICs) characterizes many immune-mediated diseases. In this work, the molecular requirements for the deposition of circulating ICs and subsequent acute leukocyte recruitment in mice were elucidated. We show that after intravenous injection, preformed soluble ICs are rapidly deposited in the postcapillary venules of the cremaster microcirculation, secondary to increased vascular permeability. This deposition is dependent on complement C1q. IC deposition is associated with leukocyte recruitment. Leukocyte rolling, which is mediated by P-selectin in the exteriorized cremaster muscle, is not further increased in response to ICs. In contrast, leukocyte rolling velocity is significantly decreased and leukocyte adhesion is significantly increased in the presence of ICs. The IC-mediated slow leukocyte rolling velocity and subsequent adhesion and emigration are dependent on Fcγ receptors (FcγRs), particularly FcγRIII, with complement C3 and C5 having no detectable role. These studies suggest a regulatory mechanism of IC deposition and leukocyte trafficking in IC-mediated inflammation requiring C1q and FcγRs in sequential, noninteracting roles.
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Affiliation(s)
- Tracy Stokol
- Department of Pathology, Brigham and Women's Hospital, Boston, MA 02115, USA
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27
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Gregory JL, Leech MT, David JR, Yang YH, Dacumos A, Hickey MJ. Reduced leukocyte-endothelial cell interactions in the inflamed microcirculation of macrophage migration inhibitory factor-deficient mice. ACTA ACUST UNITED AC 2004; 50:3023-34. [PMID: 15457472 DOI: 10.1002/art.20470] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVE Macrophage migration inhibitory factor (MIF) is a proinflammatory cytokine with established roles in a range of inflammatory conditions. However, it is not known whether MIF influences inflammation via the direct promotion of leukocyte-endothelial cell interactions. Therefore, the aim of these experiments was to investigate the ability of MIF to regulate leukocyte-endothelial cell interactions in the inflamed microvasculature. METHODS Intravital microscopy was used to examine postcapillary venules in the cremaster muscle and synovium of wild-type and MIF(-/-) mice. Leukocyte-endothelial cell interactions (rolling, adhesion, emigration) were compared under a range of inflammatory conditions. RESULTS In cremasteric postcapillary venules of MIF(-/-) mice, lipopolysaccharide (LPS)-induced leukocyte rolling, adhesion, and emigration were significantly reduced relative to that in wild-type mice. Similar responses were observed in response to tumor necrosis factor alpha and histamine. Examination of the synovial microvasculature following exposure to carrageenan revealed that leukocyte rolling and adhesion in synovial postcapillary venules and leukocyte entry into the joint space were also reduced significantly in MIF(-/-) mice. In each of these models, the level of P-selectin-dependent rolling was reduced in MIF(-/-) mice. Despite this, no difference in P-selectin expression was observed following LPS treatment. However, microvascular shear forces were elevated in MIF(-/-) mice, raising a possible mechanism to explain the reduced interactions in these animals. CONCLUSION MIF(-/-) mice consistently displayed a reduction in P-selectin-dependent rolling, suggesting that MIF exerts proinflammatory effects, in part, via the promotion of P-selectin-mediated rolling. Together, these data indicate that MIF promotes interactions between leukocytes and endothelial cells, thereby enhancing the entry of leukocytes into sites of inflammation.
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Affiliation(s)
- Julia L Gregory
- Centre for Inflammatory Diseases, Monash University, Victoria, Australia
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28
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Fernández N, Jancar S, Sánchez Crespo M. Blood and endothelium in immune complex-mediated tissue injury. Trends Pharmacol Sci 2004; 25:512-7. [PMID: 15380934 DOI: 10.1016/j.tips.2004.08.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Antigen-antibody complexes can be formed both intravascularly and perivascularly and damage tissues by inducing inflammatory mechanisms. Recent studies have characterized a definite sequence of steps involved in these inflammatory mechanisms, and identified the predominance of particular chemical mediator(s) in each step. The lesions associated with this type of inflammation are characterized by the early development of plasma leakage, followed by the recruitment of polymorphonuclear leukocytes mediated by chemokines generated by FcgammaR-dependent mechanisms. The development of these lesions is modulated by endothelial cell-derived paracrine mediators, and activation of the coagulation system can ensue. The activation of platelets and coagulation, if not properly counterbalanced by fibrinolysis, might be a major factor for the late development of fibrotic changes and organ remodeling.
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Affiliation(s)
- Nieves Fernández
- IBGM, Consejo Superior de Investigaciones Científicas, Facultad de Medicina, 47005-Valladolid, Spain
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