1
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Massimino AM, Colella FE, Bottazzi B, Inforzato A. Structural insights into the biological functions of the long pentraxin PTX3. Front Immunol 2023; 14:1274634. [PMID: 37885881 PMCID: PMC10598717 DOI: 10.3389/fimmu.2023.1274634] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 09/27/2023] [Indexed: 10/28/2023] Open
Abstract
Soluble pattern recognition molecules (PRMs) are a heterogenous group of proteins that recognize pathogen- and danger-associated molecular patterns (PAMPs and DAMPs, respectively), and cooperate with cell-borne receptors in the orchestration of innate and adaptive immune responses to pathogenic insults and tissue damage. Amongst soluble PRMs, pentraxins are a family of highly conserved proteins with distinctive structural features. Originally identified in the early 1990s as an early inflammatory gene, PTX3 is the prototype of long pentraxins. Unlike the short pentraxin C reactive protein (CRP), whose expression is mostly confined to the liver, PTX3 is made by several immune and non-immune cells at sites of infection and inflammation, where it intercepts fundamental aspects of infection immunity, inflammation, and tissue remodeling. Of note, PTX3 cross talks to components of the complement system to control cancer-related inflammation and disposal of pathogens. Also, it is an essential component of inflammatory extracellular matrices (ECMs) through crosslinking of hyaluronic acid and turn-over of provisional fibrin networks that assemble at sites of tissue injury. This functional diversity is mediated by unique structural characteristics whose fine details have been unveiled only recently. Here, we revisit the structure/function relationships of this long pentraxin in light of the most recent advances in its structural biology, with a focus on the interplay with complement and the emerging roles as a component of the ECM. Differences to and similarities with the short pentraxins are highlighted and discussed.
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Affiliation(s)
| | | | - Barbara Bottazzi
- Laboratory of Cellular and Humoral Innate Immunity, IRCCS Humanitas Research Hospital, Rozzano, Italy
| | - Antonio Inforzato
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
- Laboratory of Cellular and Humoral Innate Immunity, IRCCS Humanitas Research Hospital, Rozzano, Italy
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2
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Ma YJ, Doni A, Garlanda C. Editorial: Interactions of Pentraxins and Complement in Infection, Inflammation, and Cancer. Front Immunol 2022; 13:861359. [PMID: 35251053 PMCID: PMC8892381 DOI: 10.3389/fimmu.2022.861359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Ying Jie Ma
- Department of Clinical Immunology, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Andrea Doni
- Department of Inflammation and Immunology, Humanitas Clinical and Research Center IRCCS, Milan, Italy
| | - Cecilia Garlanda
- Department of Inflammation and Immunology, Humanitas Clinical and Research Center IRCCS, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
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3
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Adam CA, Șalaru DL, Prisacariu C, Marcu DTM, Sascău RA, Stătescu C. Novel Biomarkers of Atherosclerotic Vascular Disease-Latest Insights in the Research Field. Int J Mol Sci 2022; 23:ijms23094998. [PMID: 35563387 PMCID: PMC9103799 DOI: 10.3390/ijms23094998] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 02/06/2023] Open
Abstract
The atherosclerotic vascular disease is a cardiovascular continuum in which the main role is attributed to atherosclerosis, from its appearance to its associated complications. The increasing prevalence of cardiovascular risk factors, population ageing, and burden on both the economy and the healthcare system have led to the development of new diagnostic and therapeutic strategies in the field. The better understanding or discovery of new pathophysiological mechanisms and molecules modulating various signaling pathways involved in atherosclerosis have led to the development of potential new biomarkers, with key role in early, subclinical diagnosis. The evolution of technological processes in medicine has shifted the attention of researchers from the profiling of classical risk factors to the identification of new biomarkers such as midregional pro-adrenomedullin, midkine, stromelysin-2, pentraxin 3, inflammasomes, or endothelial cell-derived extracellular vesicles. These molecules are seen as future therapeutic targets associated with decreased morbidity and mortality through early diagnosis of atherosclerotic lesions and future research directions.
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Affiliation(s)
- Cristina Andreea Adam
- Institute of Cardiovascular Diseases “Prof. Dr. George I.M. Georgescu”, 700503 Iași, Romania; (C.A.A.); (C.P.); (R.A.S.); (C.S.)
| | - Delia Lidia Șalaru
- Institute of Cardiovascular Diseases “Prof. Dr. George I.M. Georgescu”, 700503 Iași, Romania; (C.A.A.); (C.P.); (R.A.S.); (C.S.)
- Department of Internal Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iași, Romania;
- Correspondence:
| | - Cristina Prisacariu
- Institute of Cardiovascular Diseases “Prof. Dr. George I.M. Georgescu”, 700503 Iași, Romania; (C.A.A.); (C.P.); (R.A.S.); (C.S.)
- Department of Internal Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iași, Romania;
| | - Dragoș Traian Marius Marcu
- Department of Internal Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iași, Romania;
| | - Radu Andy Sascău
- Institute of Cardiovascular Diseases “Prof. Dr. George I.M. Georgescu”, 700503 Iași, Romania; (C.A.A.); (C.P.); (R.A.S.); (C.S.)
- Department of Internal Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iași, Romania;
| | - Cristian Stătescu
- Institute of Cardiovascular Diseases “Prof. Dr. George I.M. Georgescu”, 700503 Iași, Romania; (C.A.A.); (C.P.); (R.A.S.); (C.S.)
- Department of Internal Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iași, Romania;
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4
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Parente R, Possetti V, Erreni M, D'Autilia F, Bottazzi B, Garlanda C, Mantovani A, Inforzato A, Doni A. Complementary Roles of Short and Long Pentraxins in the Complement-Mediated Immune Response to Aspergillus fumigatus Infections. Front Immunol 2021; 12:785883. [PMID: 34868070 PMCID: PMC8637271 DOI: 10.3389/fimmu.2021.785883] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 09/29/2021] [Accepted: 11/01/2021] [Indexed: 01/08/2023] Open
Abstract
The ubiquitous mold Aspergillus fumigatus is the major etiologic agent of invasive aspergillosis, a life-threatening infection amongst immune compromised individuals. An increasing body of evidence indicates that effective disposal of A. fumigatus requires the coordinate action of both cellular and humoral components of the innate immune system. Early recognition of the fungal pathogen, in particular, is mediated by a set of diverse soluble pattern recognition molecules (PRMs) that act as "ancestral antibodies" inasmuch as they are endowed with opsonic, pro-phagocytic and killing properties. Pivotal is, in this respect, the contribution of the complement system, which functionally cooperates with cell-borne pattern recognition receptors (PRRs) and other soluble PRMs, including pentraxins. Indeed, complement and pentraxins form an integrated system with crosstalk, synergism, and regulation, which stands as a paradigm of the interplay between PRMs in the mounting and orchestration of antifungal immunity. Following upon our past experience with the long pentraxin PTX3, a well-established immune effector in the host response to A. fumigatus, we recently reported that this fungal pathogen is targeted in vitro and in vivo by the short pentraxin Serum Amyloid P component (SAP) too. Similar to PTX3, SAP promotes phagocytosis and disposal of the fungal pathogen via complement-dependent pathways. However, the two proteins exploit different mechanisms of complement activation and receptor-mediated phagocytosis, which further extends complexity and integration of the complement-pentraxin crosstalk in the immune response to A. fumigatus. Here we revisit this crosstalk in light of the emerging roles of SAP as a novel PRM with antifungal activity.
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Affiliation(s)
- Raffaella Parente
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Milan, Italy
| | - Valentina Possetti
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Milan, Italy
| | - Marco Erreni
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Francesca D'Autilia
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Milan, Italy
| | - Barbara Bottazzi
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Milan, Italy
| | - Cecilia Garlanda
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Alberto Mantovani
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy.,The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Antonio Inforzato
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Andrea Doni
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Humanitas Research Hospital, Milan, Italy
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5
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Geyer CE, Mes L, Newling M, den Dunnen J, Hoepel W. Physiological and Pathological Inflammation Induced by Antibodies and Pentraxins. Cells 2021; 10:1175. [PMID: 34065953 PMCID: PMC8150799 DOI: 10.3390/cells10051175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/05/2021] [Accepted: 05/06/2021] [Indexed: 12/12/2022] Open
Abstract
Macrophages play a key role in induction of inflammatory responses. These inflammatory responses are mostly considered to be instigated by activation of pattern recognition receptors (PRRs) or cytokine receptors. However, recently it has become clear that also antibodies and pentraxins, which can both activate Fc receptors (FcRs), induce very powerful inflammatory responses by macrophages that can even be an order of magnitude greater than PRRs. While the physiological function of this antibody-dependent inflammation (ADI) is to counteract infections, undesired activation or over-activation of this mechanism will lead to pathology, as observed in a variety of disorders, including viral infections such as COVID-19, chronic inflammatory disorders such as Crohn's disease, and autoimmune diseases such as rheumatoid arthritis. In this review we discuss how physiological ADI provides host defense by inducing pathogen-specific immunity, and how erroneous activation of this mechanism leads to pathology. Moreover, we will provide an overview of the currently known signaling and metabolic pathways that underlie ADI, and how these can be targeted to counteract pathological inflammation.
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Affiliation(s)
- Chiara Elisabeth Geyer
- Amsterdam Rheumatology and Immunology Center, Department of Rheumatology and Clinical Immunology, Amsterdam UMC, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
- Department of Experimental Immunology, Amsterdam UMC, Amsterdam Infection and Immunity Institute, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Lynn Mes
- Amsterdam Rheumatology and Immunology Center, Department of Rheumatology and Clinical Immunology, Amsterdam UMC, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
- Department of Experimental Immunology, Amsterdam UMC, Amsterdam Infection and Immunity Institute, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
- Department of Medical Microbiology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Melissa Newling
- Amsterdam Rheumatology and Immunology Center, Department of Rheumatology and Clinical Immunology, Amsterdam UMC, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
- Department of Experimental Immunology, Amsterdam UMC, Amsterdam Infection and Immunity Institute, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Jeroen den Dunnen
- Amsterdam Rheumatology and Immunology Center, Department of Rheumatology and Clinical Immunology, Amsterdam UMC, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
- Department of Experimental Immunology, Amsterdam UMC, Amsterdam Infection and Immunity Institute, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Willianne Hoepel
- Amsterdam Rheumatology and Immunology Center, Department of Rheumatology and Clinical Immunology, Amsterdam UMC, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
- Department of Experimental Immunology, Amsterdam UMC, Amsterdam Infection and Immunity Institute, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
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6
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Larson PA, Bartlett ML, Garcia K, Chitty J, Balkema-Buschmann A, Towner J, Kugelman J, Palacios G, Sanchez-Lockhart M. Genomic features of humoral immunity support tolerance model in Egyptian rousette bats. Cell Rep 2021; 35:109140. [PMID: 34010652 DOI: 10.1016/j.celrep.2021.109140] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 10/08/2020] [Accepted: 04/26/2021] [Indexed: 01/05/2023] Open
Abstract
Bats asymptomatically harbor many viruses that can cause severe human diseases. The Egyptian rousette bat (ERB) is the only known reservoir for Marburgviruses and Sosuga virus, making it an exceptional animal model to study antiviral mechanisms in an asymptomatic host. With this goal in mind, we constructed and annotated the immunoglobulin heavy chain locus, finding an expansion on immunoglobulin variable genes associated with protective human antibodies to different viruses. We also annotated two functional and distinct immunoglobulin epsilon genes and four distinctive functional immunoglobulin gamma genes. We described the Fc receptor repertoire in ERBs, including features that may affect activation potential, and discovered the lack of evolutionary conserved short pentraxins. These findings reinforce the hypothesis that a differential threshold of regulation and/or absence of key immune mediators may promote tolerance and decrease inflammation in ERBs.
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Affiliation(s)
- Peter A Larson
- Center for Genome Sciences, US Army Medical Research Institute of Infectious Diseases, Frederick, MD 21702, USA
| | - Maggie L Bartlett
- Center for Genome Sciences, US Army Medical Research Institute of Infectious Diseases, Frederick, MD 21702, USA; Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Karla Garcia
- Center for Genome Sciences, US Army Medical Research Institute of Infectious Diseases, Frederick, MD 21702, USA; Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Joseph Chitty
- Center for Genome Sciences, US Army Medical Research Institute of Infectious Diseases, Frederick, MD 21702, USA
| | | | - Jonathan Towner
- Viral Special Pathogens Branch, Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Jeffrey Kugelman
- Center for Genome Sciences, US Army Medical Research Institute of Infectious Diseases, Frederick, MD 21702, USA
| | - Gustavo Palacios
- Center for Genome Sciences, US Army Medical Research Institute of Infectious Diseases, Frederick, MD 21702, USA.
| | - Mariano Sanchez-Lockhart
- Center for Genome Sciences, US Army Medical Research Institute of Infectious Diseases, Frederick, MD 21702, USA; Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA.
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7
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Brilland B, Vinatier E, Subra JF, Jeannin P, Augusto JF, Delneste Y. Anti-Pentraxin Antibodies in Autoimmune Diseases: Bystanders or Pathophysiological Actors? Front Immunol 2021; 11:626343. [PMID: 33664737 PMCID: PMC7921723 DOI: 10.3389/fimmu.2020.626343] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 11/05/2020] [Accepted: 12/29/2020] [Indexed: 11/16/2022] Open
Abstract
Pentraxins are soluble innate immunity receptors involved in sensing danger molecules. They are classified as short (CRP, SAP) and long pentraxin subfamilies, including the prototypic long pentraxin PTX3. Pentraxins act mainly as bridging molecules favoring the clearance of microbes and dead cells. They are also involved in many other biological processes, such as regulation of complement activation, inflammation and tissue homeostasis. Autoantibodies directed against pentraxins have been reported in various autoimmune diseases, especially in systemic lupus erythematosus and ANCA-associated vasculitis. In this review, we review the main biological characteristics and functions of pentraxins and summarize data concerning autoantibodies directed against pentraxins in the context of autoimmune diseases and discuss their potential pathological role.
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Affiliation(s)
- Benoit Brilland
- CHU Angers, Service de Néphrologie-Dialyse-Transplantation, Angers, France.,Université d'Angers, INSERM, CRCINA, Angers, France
| | - Emeline Vinatier
- Université d'Angers, INSERM, CRCINA, Angers, France.,CHU Angers, Service d'Immunologie et Allergologie, Angers, France
| | - Jean-François Subra
- CHU Angers, Service de Néphrologie-Dialyse-Transplantation, Angers, France.,Université d'Angers, INSERM, CRCINA, Angers, France
| | - Pascale Jeannin
- Université d'Angers, INSERM, CRCINA, Angers, France.,CHU Angers, Service d'Immunologie et Allergologie, Angers, France
| | - Jean-François Augusto
- CHU Angers, Service de Néphrologie-Dialyse-Transplantation, Angers, France.,Université d'Angers, INSERM, CRCINA, Angers, France
| | - Yves Delneste
- Université d'Angers, INSERM, CRCINA, Angers, France.,CHU Angers, Service d'Immunologie et Allergologie, Angers, France
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8
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Enocsson H, Gullstrand B, Eloranta ML, Wetterö J, Leonard D, Rönnblom L, Bengtsson AA, Sjöwall C. C-Reactive Protein Levels in Systemic Lupus Erythematosus Are Modulated by the Interferon Gene Signature and CRP Gene Polymorphism rs1205. Front Immunol 2021; 11:622326. [PMID: 33584722 PMCID: PMC7876312 DOI: 10.3389/fimmu.2020.622326] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 12/17/2020] [Indexed: 12/23/2022] Open
Abstract
Objectives Patients with systemic lupus erythematosus (SLE) often display modest elevations of C-reactive protein (CRP) despite raised disease activity and increased interleukin (IL-) 6. We asked to what extent IL-6 levels, the CRP polymorphism rs1205, and the type I interferon (IFN) gene signature affects the basal CRP levels in patients with SLE during a quiescent phase of the disease. Methods CRP and IL-6 were analyzed in plasma from 57 patients meeting established classification criteria for SLE. The CRP polymorphism rs1205 was assessed and gene expression analyzed including four type I IFN-regulated genes (IGS). Results CRP was increased in patients with detectable IL-6 levels (p=0.001) and decreased among IGS-positive subjects (p=0.033). A multiple linear regression model revealed IL-6 to have a positive association with CRP levels, whereas both IGS-positivity and CRP genotype (rs1205) AA/GA were negatively associated with CRP-levels. Conclusion Our data offer an explanation to the modest CRP levels seen in viral infections and IFN-α driven autoimmunity and corroborate prior observations showing an IFN-α dependent downregulation of CRP. The latter observation, together with the fact that the CRP-lowering polymorphism rs1205 is overrepresented in human SLE, could explain low basal CRP and inadequate CRP-responses among patients with active SLE.
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Affiliation(s)
- Helena Enocsson
- Department of Biomedical and Clinical Sciences, Division of Inflammation and Infection, Linköping University, Linköping, Sweden
| | - Birgitta Gullstrand
- Department of Clinical Sciences Lund, Division of Rheumatology, Lund University, Lund, Sweden
| | - Maija-Leena Eloranta
- Department of Medical Sciences, Rheumatology, Uppsala University, Uppsala, Sweden
| | - Jonas Wetterö
- Department of Biomedical and Clinical Sciences, Division of Inflammation and Infection, Linköping University, Linköping, Sweden
| | - Dag Leonard
- Department of Medical Sciences, Rheumatology, Uppsala University, Uppsala, Sweden
| | - Lars Rönnblom
- Department of Medical Sciences, Rheumatology, Uppsala University, Uppsala, Sweden
| | - Anders A Bengtsson
- Department of Clinical Sciences Lund, Division of Rheumatology, Lund University, Lund, Sweden
| | - Christopher Sjöwall
- Department of Biomedical and Clinical Sciences, Division of Inflammation and Infection, Linköping University, Linköping, Sweden
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9
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Wetterö J, von Löhneysen S, Cobar F, Kristenson M, Garvin P, Sjöwall C. Pronounced Diurnal Pattern of Salivary C-Reactive Protein (CRP) With Modest Associations to Circulating CRP Levels. Front Immunol 2021; 11:607166. [PMID: 33488610 PMCID: PMC7821713 DOI: 10.3389/fimmu.2020.607166] [Citation(s) in RCA: 6] [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: 09/16/2020] [Accepted: 11/27/2020] [Indexed: 01/04/2023] Open
Abstract
C-reactive protein (CRP), a humoral component of the innate immune system with important functions in host-defense, is extensively used as a sensitive biomarker of systemic inflammation. During inflammation, hepatocyte-derived CRP rises dramatically in the blood due to increased interleukin-6 (IL-6) levels. Reliable detection of CRP in saliva, instead of blood, would offer advantages regarding sampling procedure and availability but using saliva as a diagnostic body fluid comes with challenges. The aims of this study were to evaluate associations between salivary CRP, total protein levels in saliva and serum CRP. Furthermore, we examined associations with plasma IL-6, body mass index (BMI), tobacco smoking and age. Salivary CRP was investigated by ELISA in 107 middle-aged participants from the general population. We employed spectrophotometric determination of total protein levels. Correlation analyses were used for associations of salivary CRP with serum CRP (turbidimetry), plasma IL-6 (Luminex®), BMI and smoking habits. Salivary median CRP was 68% higher (p=0.009), and total protein levels were 167% higher (p<0.0001), in morning compared to evening saliva. The correlation coefficients between serum and salivary CRP were low to moderate, but stronger for evening than morning saliva. Plasma IL-6 correlated significantly with serum CRP (rs=0.41, p<0.01), but not with morning or evening salivary CRP. Non-smokers showed 103% higher salivary CRP levels (p=0.015), whereas serum CRP was independent of smoking status. As opposed to CRP in serum, salivary CRP was not associated with BMI. Salivary CRP was 90% higher among the age interval 60–69 years compared to subjects aged 45–59 (p=0.02) while serum CRP levels did not differ between the age groups. In conclusion, CRP in saliva did not straightforwardly reflect serum concentrations. This raises questions regarding adequate reflection of biological events. The pronounced diurnal salivary CRP pattern accentuates the importance of standardizing the time-point of sampling.
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Affiliation(s)
- Jonas Wetterö
- Division of Inflammation and Infection, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Sarah von Löhneysen
- Faculty of Mathematics and Computer Science, University of Leipzig, Leipzig, Germany
| | - Flordelyn Cobar
- Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet and Rheumatology, Karolinska University Hospital, Stockholm, Sweden
| | - Margareta Kristenson
- Division of Society and Health, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Peter Garvin
- Research and Development Unit in Region Östergötland, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Christopher Sjöwall
- Division of Inflammation and Infection, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
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10
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Stravalaci M, Davi F, Parente R, Gobbi M, Bottazzi B, Mantovani A, Day AJ, Clark SJ, Romano MR, Inforzato A. Control of Complement Activation by the Long Pentraxin PTX3: Implications in Age-Related Macular Degeneration. Front Pharmacol 2020; 11:591908. [PMID: 33324220 PMCID: PMC7725797 DOI: 10.3389/fphar.2020.591908] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 08/05/2020] [Accepted: 10/28/2020] [Indexed: 12/28/2022] Open
Abstract
Dysregulation of the complement system is central to age-related macular degeneration (AMD), the leading cause of blindness in the developed world. Most of the genetic variation associated with AMD resides in complement genes, with the greatest risk associated with polymorphisms in the complement factor H (CFH) gene; factor H (FH) is the major inhibitor of the alternative pathway (AP) of complement that specifically targets C3b and the AP C3 convertase. Long pentraxin 3 (PTX3) is a soluble pattern recognition molecule that has been proposed to inhibit AP activation via recruitment of FH. Although present in the human retina, if and how PTX3 plays a role in AMD is still unclear. In this work we demonstrated the presence of PTX3 in the human vitreous and studied the PTX3-FH-C3b crosstalk and its effects on complement activation in a model of retinal pigment epithelium (RPE). RPE cells cultured in inflammatory AMD-like conditions overexpressed the PTX3 protein, and up-regulated AP activating genes. PTX3 bound RPE cells in a physiological setting, however this interaction was reduced in inflammatory conditions, whereby PTX3 had no complement-inhibiting activity on inflamed RPE. However, on non-cellular surfaces, PTX3 formed a stable ternary complex with FH and C3b that acted as a “hot spot” for complement inhibition. Our findings suggest a protective role for PTX3 in response to complement dysregulation in AMD and point to a novel mechanism of complement regulation by this pentraxin with potential implications in pathology and pharmacology of AMD.
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Affiliation(s)
- Matteo Stravalaci
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Humanitas Clinical and Research Center IRCCS, Milan, Italy
| | - Francesca Davi
- Humanitas Clinical and Research Center IRCCS, Milan, Italy
| | | | - Marco Gobbi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | | | - Alberto Mantovani
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Humanitas Clinical and Research Center IRCCS, Milan, Italy.,The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Anthony J Day
- Wellcome Trust Centre for Cell-Matrix Research and Lydia Becker Institute of Immunology and Inflammation, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, United Kingdom
| | - Simon J Clark
- Universitäts-Augenklinik Tübingen, Eberhard Karls University of Tübingen, Tübingen, Germany.,The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Mario R Romano
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Eye Center, Humanitas Gavazzeni-Castelli, Bergamo, Italy
| | - Antonio Inforzato
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Humanitas Clinical and Research Center IRCCS, Milan, Italy
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11
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Parente R, Doni A, Bottazzi B, Garlanda C, Inforzato A. The complement system in Aspergillus fumigatus infections and its crosstalk with pentraxins. FEBS Lett 2020; 594:2480-2501. [PMID: 31994174 DOI: 10.1002/1873-3468.13744] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 11/29/2019] [Revised: 12/19/2019] [Accepted: 01/16/2020] [Indexed: 12/13/2022]
Abstract
Aspergillosis is a life-threatening infection mostly affecting immunocompromised individuals and primarily caused by the saprophytic fungus Aspergillus fumigatus. At the host-pathogen interface, both cellular and humoral components of the innate immune system are increasingly acknowledged as essential players in the recognition and disposal of this opportunistic mold. Fundamental hereof is the contribution of the complement system, which deploys all three activation pathways in the battle against A. fumigatus, and functionally cooperates with other soluble pattern recognition molecules, including pentraxins. In particular, preclinical and clinical observations point to the long pentraxin PTX3 as a nonredundant and complement-dependent effector with protective functions against A. fumigatus. Based on past and current literature, here we discuss how the complement participates in the immune response to this fungal pathogen, and illustrate its crosstalk with the pentraxins, with a focus on PTX3. Emphasis is placed on the molecular mechanisms underlying such processes, the genetic evidence from human epidemiology, and the translational potential of the currently available knowledge.
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Affiliation(s)
- Raffaella Parente
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy
| | - Andrea Doni
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy
| | - Barbara Bottazzi
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy
| | - Cecilia Garlanda
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Antonio Inforzato
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
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12
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Bottazzi B, Garlanda C, Teixeira MM. Editorial: The Role of Pentraxins: From Inflammation, Tissue Repair and Immunity to Biomarkers. Front Immunol 2019; 10:2817. [PMID: 31849985 PMCID: PMC6901624 DOI: 10.3389/fimmu.2019.02817] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 11/15/2019] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - Cecilia Garlanda
- Humanitas Research Hospital, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Rozzano, Italy
| | - Mauro Martins Teixeira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
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13
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Parente R, Sobacchi C, Bottazzi B, Mantovani A, Grčevic D, Inforzato A. The Long Pentraxin PTX3 in Bone Homeostasis and Pathology. Front Immunol 2019; 10:2628. [PMID: 31787987 PMCID: PMC6856142 DOI: 10.3389/fimmu.2019.02628] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 07/31/2019] [Accepted: 10/23/2019] [Indexed: 01/24/2023] Open
Abstract
The innate immune system is equipped with a number of germ-line encoded soluble pattern recognition molecules (PRMs) that collectively mediate the humoral host response to infection and damage in cooperation with cells and tissues of the immune and non-immune compartments. Despite the impressive diversity in structure, source, and regulation across PRMs, these all share remarkably similar functions inasmuch as they recognize microbes and damaged tissues, activate complement, exert opsono-phagocytic activities, and regulate inflammation. The long pentraxin 3 (PTX3) is a prototypic soluble PRM. Long known as a major player in innate immunity, inflammation and matrix remodeling, only recently has PTX3 emerged as a mediator of bone homeostasis in rodents and humans. Ptx3-targeted mice exhibit reduced trabecular volume during bone development, and impaired callus mineralization following experimental fracture. The murine gene is expressed in vivo by non-hematopoietic periosteal cells in the early phases of fracture healing, and in vitro by maturing osteoblasts. Human osteoblasts do express the PTX3 protein, whose levels positively correlate with bone density in vivo and osteoblast proliferation and maturation in vitro, thus pointing to a role in bone deposition. Contrasting evidence, however, suggest osteoclastogenesis-promoting effects of PTX3, where its expression has been associated with periodontitis, arthritis, and bone metastasis, conditions hallmarked by inflammation and bone resorption. Here, we review past and recent literature on the functions exerted by this long pentraxin in bone biology, with major emphasis on physiological skeletal remodeling, fracture healing, and chronic diseases of the bone.
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Affiliation(s)
- Raffaella Parente
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy
| | - Cristina Sobacchi
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy.,CNR-IRGB, Milan Unit, Milan, Italy
| | - Barbara Bottazzi
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy
| | - Alberto Mantovani
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy.,The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Danka Grčevic
- Department of Physiology and Immunology, School of Medicine, University of Zagreb, Zagreb, Croatia.,Croatian Institute for Brain Research, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - Antonio Inforzato
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
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14
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Doni A, Stravalaci M, Inforzato A, Magrini E, Mantovani A, Garlanda C, Bottazzi B. The Long Pentraxin PTX3 as a Link Between Innate Immunity, Tissue Remodeling, and Cancer. Front Immunol 2019; 10:712. [PMID: 31019517 PMCID: PMC6459138 DOI: 10.3389/fimmu.2019.00712] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [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: 01/10/2019] [Accepted: 03/15/2019] [Indexed: 12/20/2022] Open
Abstract
The innate immune system comprises a cellular and a humoral arm. Humoral pattern recognition molecules include complement components, collectins, ficolins, and pentraxins. These molecules are involved in innate immune responses by recognizing microbial moieties and damaged tissues, activating complement, exerting opsonic activity and facilitating phagocytosis, and regulating inflammation. The long pentraxin PTX3 is a prototypic humoral pattern recognition molecule that, in addition to providing defense against infectious agents, plays several functions in tissue repair and regulation of cancer-related inflammation. Characterization of the PTX3 molecular structure and biochemical properties, and insights into its interactome and multiple roles in tissue damage and remodeling support the view that microbial and matrix recognition are evolutionarily conserved functions of humoral innate immunity molecules.
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Affiliation(s)
- Andrea Doni
- Humanitas Clinical and Research Institute-IRCCS, Milan, Italy
| | - Matteo Stravalaci
- Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Antonio Inforzato
- Humanitas Clinical and Research Institute-IRCCS, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Elena Magrini
- Humanitas Clinical and Research Institute-IRCCS, Milan, Italy
| | - Alberto Mantovani
- Humanitas Clinical and Research Institute-IRCCS, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy.,The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Cecilia Garlanda
- Humanitas Clinical and Research Institute-IRCCS, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
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15
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Abstract
The complement is the first line of immune defense system involved in elimination of invading pathogens and dying host cells. Its activation is mainly triggered by immune complexes or pattern recognition molecules (PRMs) upon recognition against non-self or altered self-cells, such as C1q, collectins, ficolins, and properdin. Recent findings have interestingly shown that the pentraxins (C-reactive protein, CRP; serum-amyloid P component, SAP; long pentraxin 3, PTX3) are involved in complement activation and amplification via communication with complement initiation PRMs, but also complement regulation via recruitment of complement regulators, for instance C4b binding protein (C4BP) and factor H (fH). This review addresses the potential roles of the pentraxins in the complement system during infection and inflammation, and emphasizes the underlining implications of the pentraxins in the context of complement activation and regulation both under physiological and pathological conditions.
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Affiliation(s)
- Ying Jie Ma
- The Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Peter Garred
- The Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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16
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Golconda U, Sobonya RE, Klotz SA. Do Pentraxins Bind to Fungi in Invasive Human Gastrointestinal Candidiasis? J Fungi (Basel) 2018; 4:jof4030111. [PMID: 30227609 PMCID: PMC6162546 DOI: 10.3390/jof4030111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 09/02/2018] [Accepted: 09/14/2018] [Indexed: 11/18/2022] Open
Abstract
Tissue from 13 autopsy cases with invasive gastrointestinal candidiasis was studied for the binding of the pentraxins, C-reactive protein (CRP), pentraxin 3 (PTX3), and serum amyloid P component (SAP) to fungal surfaces. Invasive candidal infection was demonstrated using a hematoxylin and eosin stain and a Gomori methenamine silver stain (GMS). Immunohistochemistry was performed with CRP and PTX3 monoclonal antibodies and did not demonstrate CRP or PTX3 bound to fungi (0 of 13 cases), although CRP was extensively deposited on human tissue. A polyclonal antibody to SAP showed that SAP was bound to fungi in 12 of 13 cases. Although all three pentraxins have been reported to bind to fungi or bacteria, only SAP was bound to filamentous and yeast forms of Candida in human tissue, as detected by immunohistochemistry. SAP was abundantly present on fungi and may have affected the host innate immune response to the invading fungi.
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Affiliation(s)
- Umamaheshwari Golconda
- Department of Pathology, University of Arizona College of Medicine, Tucson, AZ 85724, USA.
| | - Richard E Sobonya
- Department of Pathology, University of Arizona College of Medicine, Tucson, AZ 85724, USA.
| | - Stephen A Klotz
- Division of Infections Diseases, Department of Medicine, University of Arizona College of Medicine, Tucson, AZ 85724, USA.
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17
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Gao P, Tang K, Wang M, Yang Q, Xu Y, Wang J, Zhao J, Xie J. Pentraxin levels in non-eosinophilic versus eosinophilic asthma. Clin Exp Allergy 2018; 48:981-989. [PMID: 29754456 DOI: 10.1111/cea.13168] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 03/07/2018] [Accepted: 05/03/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Innate immunity has been thought to be involved in asthma pathogenesis. Pentraxins, acting as soluble pattern recognition molecules, play an important role in humoral innate immunity. Asthma is a heterogeneous inflammatory disease of airways and can be classified as eosinophilic or non-eosinophilic asthma. OBJECTIVE To investigate whether pentraxin levels differ in subjects with eosinophilic versus non-eosinophilic asthma. Furthermore, to access the predictive performance of pentraxin levels for discriminating asthma inflammatory phenotypes. METHODS A total of 80 asthmatic patients and 24 healthy control subjects underwent sputum induction at study inclusion. Differential leucocyte counts were performed on selected sputum. Plasma C-reactive protein (CRP), serum amyloid P (SAP), pentraxin 3 (PTX3), and sputum SAP, PTX3, IL-8 levels were determined by enzyme-linked immunosorbent assay. RESULTS Subjects with non-eosinophilic asthma had significantly increased pentraxin levels compared with those with eosinophilic asthma and healthy controls, with median (interquartile range) plasma CRP levels of 0.86 (0.28-2.07), 0.26 (0.14-0.85), and 0.15 (0.09-0.45)mg/L (P < .001), respectively, plasma SAP levels of 33.69 (19.79-58.39), 19.76 (16.11-30.58), and 20.06 (15.68-31.11)mg/L (P = .003), respectively, and sputum PTX3 levels of 4.9 (1.35-18.72), 0.87 (0.30-2.07), and 1.08 (0.31-4.32)ng/mL (P < .001), respectively. Conversely, sputum SAP concentrations of eosinophilic asthmatics (median, 21.49 ng/mL; IQR, 6.86-38.79 ng/mL) were significantly higher than those of non-eosinophilic patients (median, 8.15 ng/mL; IQR, 2.82-18.01 ng/mL) and healthy controls (median, 8.79 ng/mL; IQR, 2.00-16.18 ng/mL). Asthma patients with high plasma CRP (P = .004), SAP (P = .005) and sputum PTX3 levels (P < 0.001) also had significantly lower sputum eosinophil percentages. Sputum PTX3 levels had the best power (11.18-fold, P < .001) to predict non-eosinophilic airway inflammation in asthma patients. CONCLUSION AND CLINICAL RELEVANCE Pentraxin levels differed significantly between patients with non-eosinophilic asthma and those with eosinophilic asthma. Furthermore, elevated pentraxin expressions may predict non-eosinophilic airway inflammation in asthmatic patients.
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Affiliation(s)
- Pengfei Gao
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, National Clinical Research Center of Respiratory Disease, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kun Tang
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, National Clinical Research Center of Respiratory Disease, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Meijia Wang
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, National Clinical Research Center of Respiratory Disease, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qun Yang
- Department of Medical Ultrasound, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yongjian Xu
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, National Clinical Research Center of Respiratory Disease, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianmiao Wang
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, National Clinical Research Center of Respiratory Disease, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianping Zhao
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, National Clinical Research Center of Respiratory Disease, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jungang Xie
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, National Clinical Research Center of Respiratory Disease, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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18
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Perea L, Coll M, Sanjurjo L, Blaya D, Taghdouini AE, Rodrigo-Torres D, Altamirano J, Graupera I, Aguilar-Bravo B, Llopis M, Vallverdú J, Caballeria J, van Grunsven LA, Sarrias MR, Ginès P, Sancho-Bru P. Pentraxin-3 modulates lipopolysaccharide-induced inflammatory response and attenuates liver injury. Hepatology 2017; 66:953-968. [PMID: 28422322 PMCID: PMC5570620 DOI: 10.1002/hep.29215] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 04/04/2017] [Accepted: 04/13/2017] [Indexed: 12/13/2022]
Abstract
Acute-on-chronic liver injury is characterized by an important inflammatory response frequently associated with endotoxemia. In this context, acute-phase proteins such as Pentraxin-3 (PTX3) are released; however, little is known about their role in chronic liver disease. The aim of this study was to elucidate the role of PTX3 in liver injury. The role of PTX3 was evaluated in cultured human cells, liver tissue slices, and mice with acute-on-chronic liver injury. PTX3 expression was assessed in tissue and serum samples from 54 patients with alcoholic hepatitis. PTX3 expression was up-regulated in animal models of liver injury and strongly induced by lipopolysaccharide (LPS). Liver cell fractionation showed that macrophages and activated hepatic stellate cells were the main cell types expressing PTX3 in liver injury. Ex vivo and in vivo studies showed that PTX3 treatment attenuated LPS-induced liver injury, inflammation, and cell recruitment. Mechanistically, PTX3 mediated the hepatic stellate cell wound-healing response. Moreover, PTX3 modulated LPS-induced inflammation in human primary liver macrophages and peripheral monocytes by enhancing a TIR domain-containing adapter-inducing interferon-dependent response and favoring a macrophage interleukin-10-like phenotype. Additionally, hepatic and plasma PTX3 levels were increased in patients with alcoholic hepatitis, a prototypic acute-on-chronic condition; and its expression correlated with disease severity scores, endotoxemia, infections, and short-term mortality, thus suggesting that expression of PTX3 found in patients could be a counterregulatory response to injury. CONCLUSION Experimental and human evidence suggests that, in addition to being a potential biomarker for alcoholic hepatitis, PTX3 participates in the wound-healing response and attenuates LPS-induced liver injury and inflammation; therefore, administration of PTX3 could be a promising therapeutic strategy in acute-on-chronic conditions, particularly those associated with endotoxemia. (Hepatology 2017;66:953-968).
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Affiliation(s)
- Luis Perea
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Mar Coll
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Barcelona, Spain
| | - Lucia Sanjurjo
- Innate Immunity Group, Health Sciences Research Institute Germans Trias i Pujol, Badalona, Spain
- Centro de Investigación Biomédica en Red Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Spain
| | - Delia Blaya
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Adil El Taghdouini
- Liver Cell Biology Lab, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Daniel Rodrigo-Torres
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - José Altamirano
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Isabel Graupera
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Barcelona, Spain
| | - Beatriz Aguilar-Bravo
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Marta Llopis
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Julia Vallverdú
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Joan Caballeria
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Barcelona, Spain
- Liver Unit, Hospital Clínic, Faculty of Medicine, University of Barcelona, Barcelona, Spain
| | - Leo A. van Grunsven
- Liver Cell Biology Lab, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Maria-Rosa Sarrias
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Barcelona, Spain
- Innate Immunity Group, Health Sciences Research Institute Germans Trias i Pujol, Badalona, Spain
| | - Pere Ginès
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Barcelona, Spain
- Liver Unit, Hospital Clínic, Faculty of Medicine, University of Barcelona, Barcelona, Spain
| | - Pau Sancho-Bru
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Barcelona, Spain
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Daigo K, Inforzato A, Barajon I, Garlanda C, Bottazzi B, Meri S, Mantovani A. Pentraxins in the activation and regulation of innate immunity. Immunol Rev 2017; 274:202-217. [PMID: 27782337 DOI: 10.1111/imr.12476] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [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: 12/13/2022]
Abstract
Humoral fluid phase pattern recognition molecules (PRMs) are a key component of the activation and regulation of innate immunity. Humoral PRMs are diverse. We focused on the long pentraxin PTX3 as a paradigmatic example of fluid phase PRMs. PTX3 acts as a functional ancestor of antibodies and plays a non-redundant role in resistance against selected microbes in mouse and man and in the regulation of inflammation. This molecule interacts with complement components, thus modulating complement activation. In particular, PTX3 regulates complement-driven macrophage-mediated tumor progression, acting as an extrinsic oncosuppressor in preclinical models and selected human tumors. Evidence collected over the years suggests that PTX3 is a biomarker and potential therapeutic agent in humans, and pave the way to translation of this molecule into the clinic.
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Affiliation(s)
- Kenji Daigo
- Department of Inflammation and Immunology, Humanitas Clinical and Research Center, Rozzano (Milan), Italy
| | - Antonio Inforzato
- Department of Inflammation and Immunology, Humanitas Clinical and Research Center, Rozzano (Milan), Italy.,Department of Medical Biotechnologies and Translational Medicine, University of Milan, Italy
| | | | - Cecilia Garlanda
- Department of Inflammation and Immunology, Humanitas Clinical and Research Center, Rozzano (Milan), Italy
| | - Barbara Bottazzi
- Department of Inflammation and Immunology, Humanitas Clinical and Research Center, Rozzano (Milan), Italy
| | - Seppo Meri
- Immunobiology Research Program, Research Programs Unit, Department of Bacteriology and Immunology, Haartman Institute, University of Helsinki , Helsinki , Finland
| | - Alberto Mantovani
- Department of Inflammation and Immunology, Humanitas Clinical and Research Center, Rozzano (Milan), Italy.,Humanitas University, Rozzano, Italy
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20
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Daigo K, Takamatsu Y, Hamakubo T. The Protective Effect against Extracellular Histones Afforded by Long-Pentraxin PTX3 as a Regulator of NETs. Front Immunol 2016; 7:344. [PMID: 27656184 PMCID: PMC5013257 DOI: 10.3389/fimmu.2016.00344] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [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: 06/30/2016] [Accepted: 08/24/2016] [Indexed: 12/13/2022] Open
Abstract
Pentraxin 3 (PTX3) is a soluble pattern recognition molecule that plays critical roles in innate immunity. Its fundamental functions include recognition of microbes, activation of complement cascades, and opsonization. The findings that PTX3 is one of the component proteins in neutrophil extracellular traps (NETs) and binds with other NET proteins imply the importance of PTX3 in the NET-mediated trapping and killing of bacteria. As NETs play certain critically important host-protective roles, aberrant NET production results in tissue damage. Extracellular histones, the main source of which is considered to be NETs, are mediators of septic death due to their cytotoxicity toward endothelial cells. PTX3 protects against extracellular histones-mediated cytotoxicity through coaggregation. In addition to the anti-bacterial roles performed in coordination with other NET proteins, PTX3 appears to mitigate the detrimental effect of over-activated NETs. A better understanding of the role of the PTX3 complexes in NETs would be expected to lead to new strategies for maintaining a healthy balance between the helpful bactericidal and undesirable detrimental activities of NETs.
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Affiliation(s)
- Kenji Daigo
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan; Humanitas Clinical and Research Center, Rozzano, Italy
| | - Yuichiro Takamatsu
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology , The University of Tokyo, Tokyo , Japan
| | - Takao Hamakubo
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology , The University of Tokyo, Tokyo , Japan
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21
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Jamil A, Mahboob A, Ahmed T. Ibuprofen targets neuronal pentraxins expresion and improves cognitive function in mouse model of AlCl 3-induced neurotoxicity. Exp Ther Med 2015; 11:601-606. [PMID: 26893653 DOI: 10.3892/etm.2015.2928] [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] [Received: 12/30/2014] [Accepted: 09/01/2015] [Indexed: 11/06/2022] Open
Abstract
Aluminum is known to exert neurotoxic effects associated with various neurodegenerative disorders, including Alzheimer's disease (AD). Ibuprofen is a well-known non-steroidal anti-inflammatory drug, which has demonstrated potential efficacy in the treatment of numerous inflammatory and neurodegenerative disorders, including AD. The present study aimed to investigate the protective effects of ibuprofen on cognitive function, and the expression levels of neuronal pentraxins (NPs) and interleukin (IL)-1β in an aluminum chloride (AlCl3)-induced mouse model of neurotoxicity. The effects of ibuprofen (100 mg/kg/day for 12 days) on learning and memory were evaluated in the AlCl3-induced neurotoxic mice using a Morris water maze and open field tests. In addition, ibuprofen was assessed for its effects on the expression levels of NPs and IL-1β in the hippocampus, cortex and amygdala of the brain. Treatment of the AlCl3-treated mice with ibuprofen decreased anxiety levels (6.90±0.34 min) compared with the AlCl3-treated group (1.80±0.29 min), as indicated by the time spent in the central area in an open field test. Furthermore, the expression levels of NP1 (1.32±0.47) and IL-1β (0.99±0.21) were significantly decreased in the hippocampus of mice following ibuprofen treatment, as compared with the AlCl3-treated mice (8.62±1.54 and 7.47±0.53, respectively). In the present study, ibuprofen was able to target novel structures in order to attenuate the inflammation associated with an AlCl3-induced mouse model of neurotoxicity; thus suggesting that ibuprofen may be considered a potential therapeutic option for the treatment of neurodegenerative diseases, including AD.
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Affiliation(s)
- Anum Jamil
- Neurobiology Laboratory, Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Sector H-12, Islamabad 44000, Pakistan
| | - Aamra Mahboob
- Neurobiology Laboratory, Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Sector H-12, Islamabad 44000, Pakistan
| | - Touqeer Ahmed
- Neurobiology Laboratory, Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Sector H-12, Islamabad 44000, Pakistan
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Foo SS, Reading PC, Jaillon S, Mantovani A, Mahalingam S. Pentraxins and Collectins: Friend or Foe during Pathogen Invasion? Trends Microbiol 2015; 23:799-811. [PMID: 26482345 PMCID: PMC7127210 DOI: 10.1016/j.tim.2015.09.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 09/07/2015] [Accepted: 09/22/2015] [Indexed: 12/24/2022]
Abstract
Innate immunity serves as the frontline defence against invading pathogens. Despite decades of research, new insights are constantly challenging our understanding of host-elicited immunity during microbial infections. Recently, two families of humoral innate immune proteins, pentraxins and collectins, have become a major focus of research in the field of innate immunity. Pentraxins and collectins are key players in activating the humoral arm of innate immunity, taking centre stage in immunoregulation and disease modulation. However, increasing evidence suggests that pentraxins and collectins can also mediate pathogenic effects during some infections. Herein, we discuss the protective and pathogenic effects of pentraxins and collectins, as well as their therapeutic significance.
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Affiliation(s)
- Suan-Sin Foo
- Institute for Glycomics, Griffith University, Gold Coast, QLD 4222, Australia
| | - Patrick C Reading
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
| | - Sébastien Jaillon
- Humanitas Clinical and Research Center, Department of Inflammation and Immunology, 20089, Rozzano, Milano, Italy
| | - Alberto Mantovani
- Humanitas Clinical and Research Center, Department of Inflammation and Immunology, 20089, Rozzano, Milano, Italy; Humanitas University, 20089, Rozzano, Milano, Italy
| | - Suresh Mahalingam
- Institute for Glycomics, Griffith University, Gold Coast, QLD 4222, Australia.
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Di Virgilio F. A Commentary on "PTX3 is an Extrinsic Oncosuppressor Regulating Complement-Dependent Inflammation in Cancer". Front Oncol 2015; 5:118. [PMID: 26075183 PMCID: PMC4446995 DOI: 10.3389/fonc.2015.00118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 05/13/2015] [Indexed: 11/13/2022] Open
Affiliation(s)
- Francesco Di Virgilio
- Section of Pathology, Oncology and Experimental Biology, Department of Morphology, Surgery and Experimental Medicine, University of Ferrara , Ferrara , Italy
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Inforzato A, Reading PC, Barbati E, Bottazzi B, Garlanda C, Mantovani A. The "sweet" side of a long pentraxin: how glycosylation affects PTX3 functions in innate immunity and inflammation. Front Immunol 2013; 3:407. [PMID: 23316195 PMCID: PMC3539679 DOI: 10.3389/fimmu.2012.00407] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [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: 09/25/2012] [Accepted: 12/17/2012] [Indexed: 12/24/2022] Open
Abstract
Innate immunity represents the first line of defense against pathogens and plays key roles in activation and orientation of the adaptive immune response. The innate immune system comprises both a cellular and a humoral arm. Components of the humoral arm include soluble pattern recognition molecules (PRMs) that recognize pathogen-associated molecular patterns and initiate the immune response in coordination with the cellular arm, therefore acting as functional ancestors of antibodies. The long pentraxin PTX3 is a prototypic soluble PRM that is produced at sites of infection and inflammation by both somatic and immune cells. Gene targeting of this evolutionarily conserved protein has revealed a non-redundant role in resistance to selected pathogens. Moreover, PTX3 exerts important functions at the crossroad between innate immunity, inflammation, and female fertility. The human PTX3 protein contains a single N-glycosylation site that is fully occupied by complex type oligosaccharides, mainly fucosylated and sialylated biantennary glycans. Glycosylation has been implicated in a number of PTX3 activities, including neutralization of influenza viruses, modulation of the complement system, and attenuation of leukocyte recruitment. Therefore, this post translational modification might act as a fine tuner of PTX3 functions in native immunity and inflammation. Here we review the studies on PTX3, with emphasis on the glycan-dependent mechanisms underlying pathogen recognition and crosstalk with other components of the innate immune system.
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Affiliation(s)
- Antonio Inforzato
- Department of Immunology and Inflammation, Humanitas Clinical and Research Center Rozzano, Italy
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