1
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Vygonskaya M, Wu Y, Price TJ, Chen Z, Smith MT, Klyne DM, Han FY. The role and treatment potential of the complement pathway in chronic pain. THE JOURNAL OF PAIN 2024:104689. [PMID: 39362355 DOI: 10.1016/j.jpain.2024.104689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2024] [Revised: 09/23/2024] [Accepted: 09/24/2024] [Indexed: 10/05/2024]
Abstract
The role of the complement system in pain syndromes has garnered attention on the back of preclinical and clinical evidence supporting its potential as a target for new analgesic pharmacotherapies. Of the components that make up the complement system, component 5a (C5a) and component 3a (C3a) are most strongly and consistently associated with pain. Receptors for C5a are widely found in immune resident cells (microglia, astrocytes, sensory neuron-associated macrophages (sNAMs)) in the central nervous system (CNS) as well as hematogenous immune cells (mast cells, macrophages, T-lymphocytes, etc.). When active, as is often observed in chronic pain conditions, these cells produce various inflammatory mediators including pro-inflammatory cytokines. These events can trigger nervous tissue inflammation (neuroinflammation) which coexists with and potentially maintains peripheral and central sensitization. C5a has a likely critical role in initiating this process highlighting its potential as a promising non-opioid target for treating pain. This review summarises the most up-to-date research on the role of the complement system in pain with emphasis on the C5 pathway in peripheral tissue, dorsal root ganglia (DRG) and the CNS, and explores advances in complement-targeted drug development and sex differences. A perspective on the optimal application of different C5a inhibitors for different types (e.g., neuropathic, post-surgical and chemotherapy-induced pain, osteoarthritis pain) and stages (e.g., acute, subacute, chronic) of pain is also provided to help guide future clinical trials. PERSPECTIVE: This review highlights the role and mechanisms of complement components and their receptors in physiological and pathological pain. The potential of complement-targeted therapeutics for the treatment of chronic pain is also explored with a focus on C5a inhibitors to help guide future clinical trials.
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Affiliation(s)
- Marina Vygonskaya
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Youzhi Wu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Theodore J Price
- Center for Advanced Pain Studies, Department of Neuroscience, University of Texas at Dallas, Richardson, TX 75080, USA
| | - Zhuo Chen
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Maree T Smith
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4072, Australia
| | - David M Klyne
- NHMRC Centre of Clinical Research Excellence in Spinal Pain, Injury and Health, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
| | - Felicity Y Han
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia.
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2
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He Q, Wei Y, Qian Y, Zhong M. Pathophysiological dynamics in the contact, coagulation, and complement systems during sepsis: Potential targets for nafamostat mesilate. JOURNAL OF INTENSIVE MEDICINE 2024; 4:453-467. [PMID: 39310056 PMCID: PMC11411436 DOI: 10.1016/j.jointm.2024.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 01/17/2024] [Accepted: 02/07/2024] [Indexed: 09/25/2024]
Abstract
Sepsis is a life-threatening syndrome resulting from a dysregulated host response to infection. It is the primary cause of death in the intensive care unit, posing a substantial challenge to human health and medical resource allocation. The pathogenesis and pathophysiology of sepsis are complex. During its onset, pro-inflammatory and anti-inflammatory mechanisms engage in intricate interactions, possibly leading to hyperinflammation, immunosuppression, and long-term immune disease. Of all critical outcomes, hyperinflammation is the main cause of early death among patients with sepsis. Therefore, early suppression of hyperinflammation may improve the prognosis of these patients. Nafamostat mesilate is a serine protease inhibitor, which can inhibit the activation of the complement system, coagulation system, and contact system. In this review, we discuss the pathophysiological changes occurring in these systems during sepsis, and describe the possible targets of the serine protease inhibitor nafamostat mesilate in the treatment of this condition.
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Affiliation(s)
- Qiaolan He
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yilin Wei
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yiqi Qian
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ming Zhong
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Lung Inflammation and Injury, Shanghai, China
- Shanghai Institute of Infectious Disease and Biosecurity, School of Public Health, Fudan University, Shanghai, China
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3
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Zhu A, Baur C, Götz P, Elbs K, Lasch M, Faro A, Preissner KT, Deindl E. The Complement System Is Essential for Arteriogenesis by Enhancing Sterile Inflammation as a Relevant Step in Collateral Artery Growth. Cells 2024; 13:1405. [PMID: 39272977 PMCID: PMC11394660 DOI: 10.3390/cells13171405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2024] [Revised: 08/13/2024] [Accepted: 08/22/2024] [Indexed: 09/15/2024] Open
Abstract
Arteriogenesis is an inflammatory driven mechanism, describing the growth of a natural bypass from pre-existing collateral arteries to compensate for an occluded artery. The complement system component C3 is a potent natural inflammatory activator. Here, we investigated its impact on the process of collateral artery growth using C3-deficient (C3 -/-) and wildtype control mice in a murine hindlimb model of arteriogenesis. Induction of arteriogenesis by unilateral femoral artery ligation resulted in decreased perfusion recovery in C3 -/- mice on day 7 as shown by Laser Doppler imaging. Immunofluorescence staining revealed a reduced vascular cell proliferation in C3 -/- mice. Gene expression analysis displayed a significant reduction in monocyte chemoattractant protein-1 (MCP-1) expression in C3 -/- mice. Interestingly, 3 days after induction of arteriogenesis, the number of macrophages (CD68+) recruited to growing collaterals was not affected by C3 deficiency. However, a significant reduction in inflammatory M1-like polarized macrophages (CD68+/MRC1-) was noted. Forced mast cell activation by Compound 48/80 as well as exogenous MCP-1 application rescued the number of M1-like polarized macrophages along with perfusion recovery in C3 -/- mice. In summary, this study demonstrates that complement C3 influences arteriogenesis by mediating MCP-1 expression, which is essential for the induction and enhancement of sterile inflammation.
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Affiliation(s)
- Amanda Zhu
- Institute of Surgical Research at the Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Carolin Baur
- Institute of Surgical Research at the Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Philipp Götz
- Institute of Surgical Research at the Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Katharina Elbs
- Institute of Surgical Research at the Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Manuel Lasch
- Institute of Surgical Research at the Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Anna Faro
- Institute of Surgical Research at the Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Klaus T Preissner
- Department of Cardiology, Kerckhoff-Heart Research Institute, Faculty of Medicine, Justus-Liebig-University, 35392 Giessen, Germany
| | - Elisabeth Deindl
- Institute of Surgical Research at the Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
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4
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Xiao R, Lei C, Zhang Y, Zhang M. Interleukin-6 in retinal diseases: From pathogenesis to therapy. Exp Eye Res 2023:109556. [PMID: 37385535 DOI: 10.1016/j.exer.2023.109556] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 06/03/2023] [Accepted: 06/25/2023] [Indexed: 07/01/2023]
Abstract
Interleukin-6 (IL-6) is a pleiotropic cytokine that participates in immunomodulation, inflammation, increases vascular permeability, hematopoiesis, and stimulates cell proliferation, among other biological processes. It exerts effects primarily through the classic and trans-signaling pathways. Many studies have demonstrated that IL-6 plays a critical role in the development of retinal diseases including diabetic retinopathy, uveitis, age-related macular degeneration, glaucoma, retinal vein occlusion, central serous chorioretinopathy and proliferative vitreoretinopathy. Thus, the progressive development of drugs targeting IL-6 and IL-6 receptor may play a role in the treatment of multiple retinal diseases. In this article, we comprehensively review the IL-6's biological functions of and its mechanisms in the pathogenesis of various retinal diseases. Furthermore, we summarize the drugs targeting IL-6 and its receptor and prospect their potential application in retinal diseases, hoping to provide new ideas for the treatment of retinal diseases.
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Affiliation(s)
- Ruihan Xiao
- Department of Ophthalmology and Research Laboratory of Macular Disease, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Chunyan Lei
- Department of Ophthalmology and Research Laboratory of Macular Disease, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Yi Zhang
- Department of Ophthalmology and Research Laboratory of Macular Disease, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Meixia Zhang
- Department of Ophthalmology and Research Laboratory of Macular Disease, West China Hospital, Sichuan University, Chengdu, 610041, China.
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Ghosh M, Rana S. The anaphylatoxin C5a: Structure, function, signaling, physiology, disease, and therapeutics. Int Immunopharmacol 2023; 118:110081. [PMID: 36989901 DOI: 10.1016/j.intimp.2023.110081] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 03/06/2023] [Accepted: 03/21/2023] [Indexed: 03/30/2023]
Abstract
The complement system is one of the oldest known tightly regulated host defense systems evolved for efficiently functioning cell-based immune systems and antibodies. Essentially, the complement system acts as a pivot between the innate and adaptive arms of the immune system. The complement system collectively represents a cocktail of ∼50 cell-bound/soluble glycoproteins directly involved in controlling infection and inflammation. Activation of the complement cascade generates complement fragments like C3a, C4a, and C5a as anaphylatoxins. C5a is the most potent proinflammatory anaphylatoxin, which is involved in inflammatory signaling in a myriad of tissues. This review provides a comprehensive overview of human C5a in the context of its structure and signaling under several pathophysiological conditions, including the current and future therapeutic applications targeting C5a.
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Affiliation(s)
- Manaswini Ghosh
- Chemical Biology Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Odisha 752050, India
| | - Soumendra Rana
- Chemical Biology Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Odisha 752050, India.
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6
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Abstract
The complement and hemostatic systems are complex systems, and both involve enzymatic cascades, regulators, and cell components-platelets, endothelial cells, and immune cells. The two systems are ancestrally related and are defense mechanisms that limit infection by pathogens and halt bleeding at the site of vascular injury. Recent research has uncovered multiple functional interactions between complement and hemostasis. On one side, there are proteins considered as complement factors that activate hemostasis, and on the other side, there are coagulation proteins that modulate complement. In addition, complement and coagulation and their regulatory proteins strongly interact each other to modulate endothelial, platelet and leukocyte function and phenotype, creating a potentially devastating amplifying system that must be closely regulated to avoid unwanted damage and\or disseminated thrombosis. In view of its ability to amplify all complement activity through the C3b-dependent amplification loop, the alternative pathway of complement may play a crucial role in this context. In this review, we will focus on available and emerging evidence on the role of the alternative pathway of complement in regulating hemostasis and vice-versa, and on how dysregulation of either system can lead to severe thromboinflammatory events.
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Affiliation(s)
- Marina Noris
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Miriam Galbusera
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
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7
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Kubota A, Frangogiannis NG. Macrophages in myocardial infarction. Am J Physiol Cell Physiol 2022; 323:C1304-C1324. [PMID: 36094436 PMCID: PMC9576166 DOI: 10.1152/ajpcell.00230.2022] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 09/06/2022] [Accepted: 09/06/2022] [Indexed: 11/22/2022]
Abstract
The heart contains a population of resident macrophages that markedly expands following injury through recruitment of monocytes and through proliferation of macrophages. In myocardial infarction, macrophages have been implicated in both injurious and reparative responses. In coronary atherosclerotic lesions, macrophages have been implicated in disease progression and in the pathogenesis of plaque rupture. Following myocardial infarction, resident macrophages contribute to initiation and regulation of the inflammatory response. Phagocytosis and efferocytosis are major functions of macrophages during the inflammatory phase of infarct healing, and mediate phenotypic changes, leading to acquisition of an anti-inflammatory macrophage phenotype. Infarct macrophages respond to changes in the cytokine content and extracellular matrix composition of their environment and secrete fibrogenic and angiogenic mediators, playing a central role in repair of the infarcted heart. Macrophages may also play a role in scar maturation and may contribute to chronic adverse remodeling of noninfarcted segments. Single cell studies have revealed a remarkable heterogeneity of macrophage populations in infarcted hearts; however, the relations between transcriptomic profiles and functional properties remain poorly defined. This review manuscript discusses the fate, mechanisms of expansion and activation, and role of macrophages in the infarcted heart. Considering their critical role in injury, repair, and remodeling, macrophages are important, but challenging, targets for therapeutic interventions in myocardial infarction.
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Affiliation(s)
- Akihiko Kubota
- Department of Medicine (Cardiology), Albert Einstein College of Medicine, The Wilf Family Cardiovascular Research Institute, Bronx, New York
| | - Nikolaos G Frangogiannis
- Department of Medicine (Cardiology), Albert Einstein College of Medicine, The Wilf Family Cardiovascular Research Institute, Bronx, New York
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8
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Spera MC, Cesta MC, Zippoli M, Varrassi G, Allegretti M. Emerging Approaches for the Management of Chemotherapy-Induced Peripheral Neuropathy (CIPN): Therapeutic Potential of the C5a/C5aR Axis. Pain Ther 2022; 11:1113-1136. [PMID: 36098939 PMCID: PMC9469051 DOI: 10.1007/s40122-022-00431-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 08/30/2022] [Indexed: 11/30/2022] Open
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is the most common neurologic complication of chemotherapy, resulting in symptoms like pain, sensory loss, and numbness in the hands and feet that cause lots of uneasiness in patients with cancer. They often suffer from pain so severe that it interrupts the treatment, thus invalidating the entire chemotherapy-based healing process, and significantly reducing their quality of life. In this paper, we underline the role of the complement system in CIPN, highlighting the relevance of the C5a fragment and its receptor C5aR1, whose activation is thought to be involved in triggering a cascade of events that can lead to CIPN onset. Recent experimental data showed the ability of docetaxel and paclitaxel to specifically bind and activate C5aR1, thus shining light on one of the molecular mechanisms by which taxanes may activate a cascade of events leading to neuropathy. According to these new evidence, it was possible to suggest new mechanisms underlying the pathophysiology of CIPN. Hence, the C5a/C5aR1 axis may represent a new target for CIPN treatment, and the use of C5aR1 inhibitors can be proposed as a potential new therapeutic option to manage this high unmet medical need.
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Affiliation(s)
- Maria C Spera
- Dompé Farmaceutici SpA, Via Campo di Pile, snc, L'Aquila, Italy
| | - Maria C Cesta
- Dompé Farmaceutici SpA, Via Campo di Pile, snc, L'Aquila, Italy.
| | - Mara Zippoli
- Dompé Farmaceutici SpA, Via Tommaso De Amicis, 95, Naples, Italy
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9
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Götz P, Azubuike-Osu SO, Braumandl A, Arnholdt C, Kübler M, Richter L, Lasch M, Bobrowski L, Preissner KT, Deindl E. Cobra Venom Factor Boosts Arteriogenesis in Mice. Int J Mol Sci 2022; 23:ijms23158454. [PMID: 35955584 PMCID: PMC9368946 DOI: 10.3390/ijms23158454] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 01/27/2023] Open
Abstract
Arteriogenesis, the growth of natural bypass blood vessels, can compensate for the loss of arteries caused by vascular occlusive diseases. Accordingly, it is a major goal to identify the drugs promoting this innate immune system-driven process in patients aiming to save their tissues and life. Here, we studied the impact of the Cobra venom factor (CVF), which is a C3-like complement-activating protein that induces depletion of the complement in the circulation in a murine hind limb model of arteriogenesis. Arteriogenesis was induced in C57BL/6J mice by femoral artery ligation (FAL). The administration of a single dose of CVF (12.5 µg) 24 h prior to FAL significantly enhanced the perfusion recovery 7 days after FAL, as shown by Laser Doppler imaging. Immunofluorescence analyses demonstrated an elevated number of proliferating (BrdU+) vascular cells, along with an increased luminal diameter of the grown collateral vessels. Flow cytometric analyses of the blood samples isolated 3 h after FAL revealed an elevated number of neutrophils and platelet-neutrophil aggregates. Giemsa stains displayed augmented mast cell recruitment and activation in the perivascular space of the growing collaterals 8 h after FAL. Seven days after FAL, we found more CD68+/MRC-1+ M2-like polarized pro-arteriogenic macrophages around growing collaterals. These data indicate that a single dose of CVF boosts arteriogenesis by catalyzing the innate immune reactions, relevant for collateral vessel growth.
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Affiliation(s)
- Philipp Götz
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Sharon O. Azubuike-Osu
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medicine, Alex Ekwueme Federal University Ndufu Alike, Abakaliki 482131, Ebonyi, Nigeria
| | - Anna Braumandl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Christoph Arnholdt
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Matthias Kübler
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Lisa Richter
- Flow Cytometry Core Facility, Biomedical Center, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany;
| | - Manuel Lasch
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Lisa Bobrowski
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Klaus T. Preissner
- Department of Cardiology, Kerckhoff-Heart Research Institute, Faculty of Medicine, Justus Liebig University, 35392 Giessen, Germany;
| | - Elisabeth Deindl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany; (P.G.); or (S.O.A.-O.); (A.B.); (C.A.); (M.K.); (M.L.); (L.B.)
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
- Correspondence: ; Tel.: +49-(0)-89-2180-76504
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10
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González-Ruiz FJ, Lazcano-Díaz EA, Baeza Herrera LA, Villalobos-Pedroza M, Toledo Alemán EL, Zuñiga-Salcedo MG, Cruz-Rodríguez C, López-Polanco A, Torres-Pulido A, Sierra-González de Cossio A, Cota Apodaca LA, Manzur-Sandoval D. Endotheliitis, Shunts, and Ventilation-Perfusion Mismatch in Coronavirus Disease 2019: A Literature Review of Disease Mechanisms. Ann Med Surg (Lond) 2022; 78:103820. [PMID: 35600188 PMCID: PMC9112604 DOI: 10.1016/j.amsu.2022.103820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 05/14/2022] [Accepted: 05/15/2022] [Indexed: 10/27/2022] Open
Abstract
The severe acute respiratory syndrome coronavirus 2 pandemic has continued to impact global health. However, while immunity acquired by vaccines has been developed, 40% of the world's population has still not been vaccinated. Economic problems associated with acquiring novel therapies, misinformation, and differences in treatment protocols have generated catastrophic results, especially in low-resource countries. Understanding the pathophysiological aspects of coronavirus disease and the therapeutic strategies that have been validated to date is essential for successful medical care. In this review, I summarize the historical aspects of the virus, molecules involved in infecting the host, and consequences of viral interactions with and in tissues.
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Affiliation(s)
- Francisco J. González-Ruiz
- Department of Cardiovascular Critical Care, National Institute of Cardiology “Dr. Ignacio Chávez,”, Mexico City, México
| | - Emmanuel A. Lazcano-Díaz
- Department of Cardiovascular Critical Care, National Institute of Cardiology “Dr. Ignacio Chávez,”, Mexico City, México
| | - Luis A. Baeza Herrera
- Department of Cardiovascular Critical Care, National Institute of Cardiology “Dr. Ignacio Chávez,”, Mexico City, México
| | | | - Enma L. Toledo Alemán
- Department of Cardiovascular Diseases, National Institute of Cardiology “Dr. Ignacio Chávez,”, Mexico City, Mexico
| | - Miriam G. Zuñiga-Salcedo
- Department of Cardiovascular Diseases, National Institute of Cardiology “Dr. Ignacio Chávez,”, Mexico City, Mexico
| | - Camelia Cruz-Rodríguez
- Department of Cardiovascular Critical Care, National Institute of Cardiology “Dr. Ignacio Chávez,”, Mexico City, México
| | - Alexandra López-Polanco
- Department of Cardiovascular Critical Care, National Institute of Cardiology “Dr. Ignacio Chávez,”, Mexico City, México
| | - Abraham Torres-Pulido
- Department of Cardiovascular Critical Care, National Institute of Cardiology “Dr. Ignacio Chávez,”, Mexico City, México
| | | | - Luis A. Cota Apodaca
- Department of Cardiovascular Critical Care, National Institute of Cardiology “Dr. Ignacio Chávez,”, Mexico City, México
| | - Daniel Manzur-Sandoval
- Department of Cardiovascular Critical Care, National Institute of Cardiology “Dr. Ignacio Chávez,”, Mexico City, México
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11
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Kishimoto T, Kang S. IL-6 Revisited: From Rheumatoid Arthritis to CAR T Cell Therapy and COVID-19. Annu Rev Immunol 2022; 40:323-348. [PMID: 35113729 DOI: 10.1146/annurev-immunol-101220-023458] [Citation(s) in RCA: 59] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The diverse biological activity of interleukin-6 (IL-6) contributes to the maintenance of homeostasis. Emergent infection or tissue injury induces rapid production of IL-6 and activates host defense through augmentation of acute-phase proteins and immune responses. However, excessive IL-6 production and uncontrolled IL-6 receptor signaling are critical to pathogenesis. Over the years, therapeutic agents targeting IL-6 signaling, such as tocilizumab, a humanized anti-IL-6 receptor antibody, have shown remarkable efficacy for rheumatoid arthritis, Castleman disease, and juvenile idiopathic arthritis, and their efficacy in other diseases is continually being reported. Emerging evidence has demonstrated the benefit of tocilizumab for several types of acute inflammatory diseases, including cytokine storms induced by chimeric antigen receptor T-cell therapy and coronavirus disease 2019 (COVID-19). Here, we refocus attention on the biology of IL-6 and summarize the distinct pathological roles of IL-6 signaling in several acute and chronic inflammatory diseases. Expected final online publication date for the Annual Review of Immunology, Volume 40 is April 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Tadamitsu Kishimoto
- Laboratory of Immune Regulation, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan; ,
| | - Sujin Kang
- Laboratory of Immune Regulation, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan; ,
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12
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Aiello S, Gastoldi S, Galbusera M, Ruggenenti P, Portalupi V, Rota S, Rubis N, Liguori L, Conti S, Tironi M, Gamba S, Santarsiero D, Benigni A, Remuzzi G, Noris M. C5a and C5aR1 are key drivers of microvascular platelet aggregation in clinical entities spanning from aHUS to COVID-19. Blood Adv 2022; 6:866-881. [PMID: 34852172 PMCID: PMC8945302 DOI: 10.1182/bloodadvances.2021005246] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 11/19/2021] [Indexed: 11/20/2022] Open
Abstract
Unrestrained activation of the complement system till the terminal products, C5a and C5b-9, plays a pathogenetic role in acute and chronic inflammatory diseases. In endothelial cells, complement hyperactivation may translate into cell dysfunction, favoring thrombus formation. The aim of this study was to investigate the role of the C5a/C5aR1 axis as opposed to C5b-9 in inducing endothelial dysfunction and loss of antithrombogenic properties. In vitro and ex vivo assays with serum from patients with atypical hemolytic uremic syndrome (aHUS), a prototype rare disease of complement-mediated microvascular thrombosis due to genetically determined alternative pathway dysregulation, and cultured microvascular endothelial cells, demonstrated that the C5a/C5aR1 axis is a key player in endothelial thromboresistance loss. C5a added to normal human serum fully recapitulated the prothrombotic effects of aHUS serum. Mechanistic studies showed that C5a caused RalA-mediated exocytosis of von Willebrand factor (vWF) and P-selectin from Weibel-Palade bodies, which favored further vWF binding on the endothelium and platelet adhesion and aggregation. In patients with severe COVID-19 who suffered from acute activation of complement triggered by severe acute respiratory syndrome coronavirus 2 infection, we found the same C5a-dependent pathogenic mechanisms. These results highlight C5a/C5aR1 as a common prothrombogenic effector spanning from genetic rare diseases to viral infections, and it may have clinical implications. Selective C5a/C5aR1 blockade could have advantages over C5 inhibition because the former preserves the formation of C5b-9, which is critical for controlling bacterial infections that often develop as comorbidities in severely ill patients. The ACCESS trial registered at www.clinicaltrials.gov as #NCT02464891 accounts for the results related to aHUS patients treated with CCX168.
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Affiliation(s)
- Sistiana Aiello
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Sara Gastoldi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Miriam Galbusera
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Piero Ruggenenti
- Unit of Nephrology and Dialysis, Azienda Socio-Sanitaria Territoriale (ASST) Papa Giovanni XXIII, Bergamo, Italy
| | - Valentina Portalupi
- Unit of Nephrology and Dialysis, Azienda Socio-Sanitaria Territoriale (ASST) Papa Giovanni XXIII, Bergamo, Italy
| | - Stefano Rota
- Unit of Nephrology and Dialysis, Azienda Socio-Sanitaria Territoriale (ASST) Papa Giovanni XXIII, Bergamo, Italy
| | - Nadia Rubis
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Lucia Liguori
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Sara Conti
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Matteo Tironi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Sara Gamba
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Donata Santarsiero
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
| | - Marina Noris
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy; and
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13
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Gorman DM, Li XX, Lee JD, Fung JN, Cui CS, Lee HS, Rolfe BE, Woodruff TM, Clark RJ. Development of Potent and Selective Agonists for Complement C5a Receptor 1 with In Vivo Activity. J Med Chem 2021; 64:16598-16608. [PMID: 34762432 DOI: 10.1021/acs.jmedchem.1c01174] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The anaphylatoxin C5a is a complement peptide associated with immune-related disorders. C5a binds with equal potency to two GPCRs, C5aR1 and C5aR2. Multiple C5a peptide agonists have been developed to interrogate the C5a receptor function but none show selectivity for C5aR1. To address these limitations, we developed potent and stable peptide C5aR1 agonists that display no C5aR2 activity and over 1000-fold selectivity for C5aR1 over C3aR. This includes BM213, which induces C5aR1-mediated calcium mobilization and pERK1/2 signaling but not β-arrestin recruitment, and BM221, which exhibits no signaling bias. Both ligands are functionally similar to C5a in human macrophage cytokine release assays and in a murine in vivo neutrophil mobilization assay. BM213 showed antitumor activity in a mouse model of mammary carcinoma. We anticipate that these C5aR1-selective agonists will be useful research tools to investigate C5aR1 function.
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Affiliation(s)
- Declan M Gorman
- School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Xaria X Li
- School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - John D Lee
- School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jenny N Fung
- School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Cedric S Cui
- School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Han Siean Lee
- School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Barbara E Rolfe
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Trent M Woodruff
- School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia.,Queensland Brain Institute, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Richard J Clark
- School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
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14
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Guo Y, Li T, Xia X, Su B, Li H, Feng Y, Han J, Wang X, Jia L, Bao Z, Li J, Liu Y, Li L. Different Profiles of Antibodies and Cytokines Were Found Between Severe and Moderate COVID-19 Patients. Front Immunol 2021; 12:723585. [PMID: 34489974 PMCID: PMC8417126 DOI: 10.3389/fimmu.2021.723585] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 08/03/2021] [Indexed: 01/08/2023] Open
Abstract
Objectives Our objective was to determine the antibody and cytokine profiles in different COVID-19 patients. Methods COVID-19 patients with different clinical classifications were enrolled in this study. The level of IgG antibodies, IgA, IgM, IgE, and IgG subclasses targeting N and S proteins were tested using ELISA. Neutralizing antibody titers were determined by using a toxin neutralization assay (TNA) with live SARS-CoV-2. The concentrations of 8 cytokines, including IL-2, IL-4, IL-6, IL-10, CCL2, CXCL10, IFN-γ, and TNF-α, were measured using the Protein Sample Ella-Simple ELISA system. The differences in antibodies and cytokines between severe and moderate patients were compared by t-tests or Mann-Whitney tests. Results A total of 79 COVID-19 patients, including 49 moderate patients and 30 severe patients, were enrolled. Compared with those in moderate patients, neutralizing antibody and IgG-S antibody titers in severe patients were significantly higher. The concentration of IgG-N antibody was significantly higher than that of IgG-S antibody in COVID-19 patients. There was a significant difference in the distribution of IgG subclass antibodies between moderate patients and severe patients. The positive ratio of anti-S protein IgG3 is significantly more than anti-N protein IgG3, while the anti-S protein IgG4 positive rate is significantly less than the anti-N protein IgG4 positive rate. IL-2 was lower in COVID-19 patients than in healthy individuals, while IL-4, IL-6, CCL2, IFN-γ, and TNF-α were higher in COVID-19 patients than in healthy individuals. IL-6 was significantly higher in severe patients than in moderate patients. The antibody level of anti-S protein was positively correlated with the titer of neutralizing antibody, but there was no relationship between cytokines and neutralizing antibody. Conclusions Our findings show the severe COVID-19 patients’ antibody levels were stronger than those of moderate patients, and a cytokine storm is associated with COVID-19 severity. There was a difference in immunoglobulin type between anti-S protein antibodies and anti-N protein antibodies in COVID-19 patients. And clarified the value of the profile in critical prevention.
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Affiliation(s)
- Yaolin Guo
- Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Tianyi Li
- Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Xinyi Xia
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, The First School of Clinical Medicine, Southern Medical University, Nanjing, China
| | - Bin Su
- Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Hanping Li
- Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yingmei Feng
- Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Jingwan Han
- Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Xiaolin Wang
- Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Lei Jia
- Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Zuoyi Bao
- Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Jingyun Li
- Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yongjian Liu
- Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Lin Li
- Department of AIDS Research, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
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15
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Ibrahim SH. Sinusoidal endotheliopathy in nonalcoholic steatohepatitis: therapeutic implications. Am J Physiol Gastrointest Liver Physiol 2021; 321:G67-G74. [PMID: 34037463 PMCID: PMC8321796 DOI: 10.1152/ajpgi.00009.2021] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Liver sinusoidal endothelial cells (LSECs) are distinct subtypes of endothelial cells lining a low flow vascular bed at the interface of the liver parenchyma and the circulating immune cells and soluble factors. Emerging literature implicates LSEC in the pathogenesis and progression of nonalcoholic fatty liver disease (NAFLD). During the evolution of NAFLD, LSEC dysfunction ensues. LSECs undergo morphological and functional transformation known as "capillarization," as well as a pathogenic increase in surface adhesion molecules expression, referred to in this review as "endotheliopathy." LSECs govern the composition of hepatic immune cell populations in nonalcoholic steatohepatis (NASH) by mediating leukocyte subset adhesion through specific combinations of activated adhesion molecules and secreted chemokines. Moreover, extracellular vesicles released by hepatocyte under lipotoxic stress in NASH act as a catalyst for the inflammatory response and promote immune cell chemotaxis and adhesion. In the current review, we highlight leukocyte adhesion to LSEC as an initiating event in the sterile inflammatory response in NASH. We discuss preclinical studies targeting immune cells adhesion in NASH mouse models and potential therapeutic anti-inflammatory strategies for human NASH.
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Affiliation(s)
- Samar H. Ibrahim
- 1Division of Gastroenterology & Hepatology, Mayo Clinic, Rochester, Minnesota,2Division of Pediatric Gastroenterology, Mayo Clinic, Rochester, Minnesota
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16
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Deng H, Tang TX, Chen D, Tang LS, Yang XP, Tang ZH. Endothelial Dysfunction and SARS-CoV-2 Infection: Association and Therapeutic Strategies. PATHOGENS (BASEL, SWITZERLAND) 2021; 10:pathogens10050582. [PMID: 34064553 PMCID: PMC8151812 DOI: 10.3390/pathogens10050582] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/26/2021] [Accepted: 05/05/2021] [Indexed: 02/08/2023]
Abstract
Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2), has been recently considered a systemic disorder leading to the procoagulant state. Preliminary studies have shown that SARS-CoV-2 can infect endothelial cells, and extensive evidence of inflammation and endothelial dysfunction has been found in advanced COVID-19. Endothelial cells play a critical role in many physiological processes, such as controlling blood fluidity, leukocyte activation, adhesion, platelet adhesion and aggregation, and transmigration. Therefore, it is reasonable to think that endothelial dysfunction leads to vascular dysfunction, immune thrombosis, and inflammation associated with COVID-19. This article summarizes the association of endothelial dysfunction and SARS-CoV-2 infection and its therapeutic strategies.
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Affiliation(s)
- Hai Deng
- Division of Trauma & Surgical Critical Care, Department of Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (H.D.); (D.C.); (L.-S.T.)
| | - Ting-Xuan Tang
- Class 1901, School of Medicine, Wuhan University of Science and Technology, Wuhan 430065, China;
| | - Deng Chen
- Division of Trauma & Surgical Critical Care, Department of Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (H.D.); (D.C.); (L.-S.T.)
| | - Liang-Sheng Tang
- Division of Trauma & Surgical Critical Care, Department of Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (H.D.); (D.C.); (L.-S.T.)
| | - Xiang-Ping Yang
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China;
| | - Zhao-Hui Tang
- Division of Trauma & Surgical Critical Care, Department of Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (H.D.); (D.C.); (L.-S.T.)
- Correspondence:
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17
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Pons S, Fodil S, Azoulay E, Zafrani L. The vascular endothelium: the cornerstone of organ dysfunction in severe SARS-CoV-2 infection. Crit Care 2020; 24:353. [PMID: 32546188 PMCID: PMC7296907 DOI: 10.1186/s13054-020-03062-7] [Citation(s) in RCA: 330] [Impact Index Per Article: 82.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 06/04/2020] [Indexed: 12/18/2022] Open
Abstract
In severe SARS-CoV-2 infections, emerging data including recent histopathological studies have emphasized the crucial role of endothelial cells (ECs) in vascular dysfunction, immunothrombosis, and inflammation.Histopathological studies have evidenced direct viral infection of ECs, endotheliitis with diffuse endothelial inflammation, and micro- and macrovascular thrombosis both in the venous and arterial circulations. Venous thrombotic events, particularly pulmonary embolism, with elevated D-dimer and coagulation activation are highly prevalent in COVID-19 patients. The pro-inflammatory cytokine storm, with elevated levels of interleukin-6 (IL-6), IL-2 receptor, and tumor necrosis factor-α, could also participate in endothelial dysfunction and leukocyte recruitment in the microvasculature. COVID-19-induced endotheliitis may explain the systemic impaired microcirculatory function in different organs in COVID-19 patients. Ongoing trials directly and indirectly target COVID-19-related endothelial dysfunctions: i.e., a virus-cell entry using recombinant angiotensin-converting enzyme 2 (ACE2) and transmembrane protease serine 2 (TMPRSS-2) blockade, coagulation activation, and immunomodulatory therapies, such as anti-IL-6 strategies. Studies focusing on endothelial dysfunction in COVID-19 patients are warranted as to decipher their precise role in severe SARS-CoV-2 infection and organ dysfunction and to identify targets for further interventions.
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Affiliation(s)
- Stéphanie Pons
- INSERM U976, Human Immunology, Pathophysiology and Immunotherapy, Saint-Louis Teaching Hospital, Paris University, Paris, France
- Anesthesia and Critical Care Department, Avicenne Teaching Hospital, Assistance Publique des Hôpitaux de Paris, Bobigny, France
| | - Sofiane Fodil
- Department of Medical Intensive Care Unit, Saint-Louis Teaching Hospital, Assistance Publique des Hôpitaux de Paris, 1, Avenue Claude Vellefaux, 75010, Paris, France
| | - Elie Azoulay
- Department of Medical Intensive Care Unit, Saint-Louis Teaching Hospital, Assistance Publique des Hôpitaux de Paris, 1, Avenue Claude Vellefaux, 75010, Paris, France
| | - Lara Zafrani
- INSERM U976, Human Immunology, Pathophysiology and Immunotherapy, Saint-Louis Teaching Hospital, Paris University, Paris, France.
- Department of Medical Intensive Care Unit, Saint-Louis Teaching Hospital, Assistance Publique des Hôpitaux de Paris, 1, Avenue Claude Vellefaux, 75010, Paris, France.
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18
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Shivshankar P, Li YD, Mueller-Ortiz SL, Wetsel RA. In response to complement anaphylatoxin peptides C3a and C5a, human vascular endothelial cells migrate and mediate the activation of B-cells and polarization of T-cells. FASEB J 2020; 34:7540-7560. [PMID: 32301538 DOI: 10.1096/fj.201902397r] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 03/11/2020] [Accepted: 03/22/2020] [Indexed: 12/19/2022]
Abstract
The vascular endothelium has been discovered in the past several years to be important in shaping the cellular immune response. During the immune response the vascular endothelium is constantly perturbed by biologically potent molecules, including the complement activation peptides, C3a and C5a. Despite the importance of C3a and C5a in inflammation and immunity, their role in modulating lymphocyte function via activation of vascular endothelial cells is unknown. Accordingly, we investigated the regulated expression of the C3a and C5a receptors (complement anaphylatoxin C3a receptor [C3aR] and complement anaphylatoxin C5a receptor 1 [C5aR1]) on human umbilical vascular endothelial cells (HUVECs) and examined how C3a or C5a activation of HUVECs affects the activation and polarization of lymphatic cells. Our findings demonstrated that C3a and C5a increase C3aR and C5aR1 expression by HUVECs as well as directing their cellular transmigration and spreading through transwell filters. Moreover, C3a- or C5a-stimulated endothelial cells: (1) caused activation of B-lymphoblasts with significant increase in Fas Ligand (CD95L) (FasL), CD69, and IL-R1 expression, and (2) skewed T-lymphoblast cells toward a Th1 subtype, (CD4+ /CCR5+ ) that correlated with significant increase of IFN-γ. Collectively, these data indicate that C3a and C5a signaling is important in the activation and polarization of lymphocytes as they traffic through the vascular endothelium during the immune response.
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Affiliation(s)
- Pooja Shivshankar
- Research Center for Immunology and Autoimmune Diseases, Brown Foundation Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Yi-Dong Li
- Research Center for Immunology and Autoimmune Diseases, Brown Foundation Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Stacey L Mueller-Ortiz
- Research Center for Immunology and Autoimmune Diseases, Brown Foundation Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - Rick A Wetsel
- Research Center for Immunology and Autoimmune Diseases, Brown Foundation Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA.,Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
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19
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Kim H, Conway EM. Platelets and Complement Cross-Talk in Early Atherogenesis. Front Cardiovasc Med 2019; 6:131. [PMID: 31555668 PMCID: PMC6742699 DOI: 10.3389/fcvm.2019.00131] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Accepted: 08/22/2019] [Indexed: 12/16/2022] Open
Abstract
Atherosclerosis remains a ubiquitous and serious threat to human health. The initial formation of the atherosclerotic lesion (atheroma) is driven by pro-inflammatory signaling involving monocytes and vascular endothelial cells; later stages of the disease involve rupture of well-established atherosclerotic plaques, thrombosis, and blood vessel occlusion. While the central role of platelets in thrombosis is undisputed, platelets exhibit pro-inflammatory activities, and contribute to early-stage atheroma formation. Platelets also engage components of the complement system, an essential element of innate immunity that contributes to vascular inflammation. Here we provide an overview of the complex interplay between platelets and the complement system, with a focus on how the crosstalk between them may impact on the initiation of atheroma formation.
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Affiliation(s)
- Hugh Kim
- Centre for Blood Research, Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada.,Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.,Faculty of Dentistry, University of British Columbia, Vancouver, BC, Canada
| | - Edward M Conway
- Centre for Blood Research, Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada.,Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
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20
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Zhang Y, Jin S. Mitigating placental injuries through up-regulating DAF in experimental APS mice: new mechanism of progesterone. Clin Exp Immunol 2019; 197:376-386. [PMID: 31091357 PMCID: PMC6693963 DOI: 10.1111/cei.13313] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/29/2019] [Indexed: 01/06/2023] Open
Abstract
Anti-phospholipid syndrome (APS) is characterized by recurrent pathological pregnancy, arterial or venous thrombosis in the presence of anti-phospholipid antibody (aPL). Complement activation is recognized as an intermediate link leading to placental thrombosis and placental inflammation in APS model mice. Decay accelerating factor (DAF, CD55), MAC-inhibitory protein (MAC-IP, CD59) and membrane co-factor protein (MCP, CD46) are important complement inhibitory proteins (CIPs) highly expressed in normal placenta to curb excessive complement activation and its mediated injuries. Anti-β2 glycoprotein I (anti-β2GPI) antibody is an important aPL. We found that placental DAF and CD46 decreased in β2GPI passively immunized APS model mice, accompanied by C3 deposition, neutrophil infiltration and increased proinflammatory cytokine levels detected in its placenta. Progesterone supplement can up-regulate DAF but not CD46 expression, curb C3 activation and decrease proinflammatory cytokines levels to reduce fetal loss frequency. Progesterone receptor antagonist (mifepristone) or knock-down DAF with specific siRNA, above the protective effects of progesterone, were significantly weakened. Another sex hormone, oestrogen, has no significant effect on placental DAF and C3 contents and fetal loss frequency in the APS mice model. This may be an important mechanism by which progesterone induces maternal-fetal immune tolerance. At the same time, it may provide evidence for the use of progesterone in APS abortion patients.
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Affiliation(s)
- Y. Zhang
- Department of Traditional Chinese MedicineMaternal and Child Health Hospital of Hubei ProvinceHubeiChina
| | - S. Jin
- Department of Traditional Chinese MedicineMaternal and Child Health Hospital of Hubei ProvinceHubeiChina
- First Clinical Medical CollegeHubei University of Chinese MedicineHubeiChina
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21
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Inter-α-inhibitor Ameliorates Endothelial Inflammation in Sepsis. Lung 2019; 197:361-369. [PMID: 31028466 DOI: 10.1007/s00408-019-00228-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/12/2019] [Indexed: 10/26/2022]
Abstract
PURPOSE Vascular endothelial cells demonstrate severe injury in sepsis, and a reduction in endothelial inflammation would be beneficial. Inter-α-Inhibitor (IαI) is a family of abundant plasma proteins with anti-inflammatory properties and has been investigated in human and animal sepsis with encouraging results. We hypothesized that IαI may protect endothelia from sepsis-related inflammation. METHODS IαI-deficient or sufficient mice were treated with endotoxin or underwent complement-induced lung injury. VCAM-1 and ICAM-1 expression was measured in blood and lung as marker of endothelial activation. Human endothelia were exposed to activated complement C5a with or without IαI. Blood from human sepsis patients was examined for VCAM-1 and ICAM-1 and levels were correlated with blood levels of IαI. RESULTS IαI-deficient mice showed increased endothelial activation in endotoxin/sepsis- and complement-induced lung injury models. In vitro, levels of endothelial pro-inflammatory cytokines and cell growth factors induced by activated complement C5a were significantly decreased in the presence of IαI. This effect was associated with decreased ERK and NFκB activation. IαI levels were inversely associated with VCAM-1 and ICAM-1 levels in a human sepsis cohort. CONCLUSIONS IαI ameliorates endothelial inflammation and may be beneficial as a treatment of sepsis.
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22
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Ma Y, Liu Y, Zhang Z, Yang GY. Significance of Complement System in Ischemic Stroke: A Comprehensive Review. Aging Dis 2019; 10:429-462. [PMID: 31011487 PMCID: PMC6457046 DOI: 10.14336/ad.2019.0119] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 01/19/2019] [Indexed: 12/14/2022] Open
Abstract
The complement system is an essential part of innate immunity, typically conferring protection via eliminating pathogens and accumulating debris. However, the defensive function of the complement system can exacerbate immune, inflammatory, and degenerative responses in various pathological conditions. Cumulative evidence indicates that the complement system plays a critical role in the pathogenesis of ischemic brain injury, as the depletion of certain complement components or the inhibition of complement activation could reduce ischemic brain injury. Although multiple candidates modulating or inhibiting complement activation show massive potential for the treatment of ischemic stroke, the clinical availability of complement inhibitors remains limited. The complement system is also involved in neural plasticity and neurogenesis during cerebral ischemia. Thus, unexpected side effects could be induced if the systemic complement system is inhibited. In this review, we highlighted the recent concepts and discoveries of the roles of different kinds of complement components, such as C3a, C5a, and their receptors, in both normal brain physiology and the pathophysiology of brain ischemia. In addition, we comprehensively reviewed the current development of complement-targeted therapy for ischemic stroke and discussed the challenges of bringing these therapies into the clinic. The design of future experiments was also discussed to better characterize the role of complement in both tissue injury and recovery after cerebral ischemia. More studies are needed to elucidate the molecular and cellular mechanisms of how complement components exert their functions in different stages of ischemic stroke to optimize the intervention of targeting the complement system.
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Affiliation(s)
- Yuanyuan Ma
- 1Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,2Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yanqun Liu
- 3Department of Neurology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Zhijun Zhang
- 2Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Guo-Yuan Yang
- 1Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,2Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
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23
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Hwang MS, Strainic MG, Pohlmann E, Kim H, Pluskota E, Ramirez-Bergeron DL, Plow EF, Medof ME. VEGFR2 survival and mitotic signaling depends on joint activation of associated C3ar1/C5ar1 and IL-6R-gp130. J Cell Sci 2019; 132:jcs.219352. [PMID: 30765465 DOI: 10.1242/jcs.219352] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 12/20/2018] [Indexed: 12/17/2022] Open
Abstract
Purified vascular endothelial cell (EC) growth factor receptor-2 (VEGFR2) auto-phosphorylates upon VEGF-A occupation in vitro, arguing that VEGR2 confers its mitotic and viability signaling in and of itself. Herein, we show that, in ECs, VEGFR2 function requires concurrent C3a/C5a receptor (C3ar1/C5ar1) and IL-6 receptor (IL-6R)-gp130 co-signaling. C3ar1/C5ar1 or IL-6R blockade totally abolished VEGFR2 auto-phosphorylation, downstream Src, ERK, AKT, mTOR and STAT3 activation, and EC cell cycle entry. VEGF-A augmented production of C3a/C5a/IL-6 and their receptors via a two-step p-Tyk2/p-STAT3 process. Co-immunoprecipitation analyses, confocal microscopy, ligand pulldown and bioluminescence resonance energy transfer assays all indicated that the four receptors are physically interactive. Angiogenesis in murine day 5 retinas and in adult tissues was accelerated when C3ar1/C5ar1 signaling was potentiated, but repressed when it was disabled. Thus, C3ar1/C5ar1 and IL-6R-gp130 joint activation is needed to enable physiological VEGFR2 function.
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Affiliation(s)
- Ming-Shih Hwang
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Michael G Strainic
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Elliot Pohlmann
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Haesuk Kim
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Elzbieta Pluskota
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland OH 44195, USA
| | - Diana L Ramirez-Bergeron
- Case Cardiovascular Research Institute and University Hospitals, Case Western Reserve University School of Medicine and University Hospitals, Cleveland, Ohio 44106, USA
| | - Edward F Plow
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland OH 44195, USA
| | - M Edward Medof
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA
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24
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Hydrogen sulfide limits neutrophil transmigration, inflammation, and oxidative burst in lipopolysaccharide-induced acute lung injury. Sci Rep 2018; 8:14676. [PMID: 30279441 PMCID: PMC6168479 DOI: 10.1038/s41598-018-33101-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 09/20/2018] [Indexed: 01/11/2023] Open
Abstract
Transmigration and activation of neutrophils in the lung reflect key steps in the progression of acute lung injury (ALI). It is known that hydrogen sulfide (H2S) can limit neutrophil activation, but the respective mechanisms remain elusive. Here, we aimed to examine the underlying pathways in pulmonary inflammation. In vivo, C57BL/6N mice received the H2S slow releasing compound GYY4137 prior to lipopolysaccharide (LPS) inhalation. LPS challenge led to pulmonary injury, inflammation, and neutrophil transmigration that were inhibited in response to H2S pretreatment. Moreover, H2S reduced mRNA expression of macrophage inflammatory protein-2 (MIP-2) and its receptor in lung tissue, as well as the accumulation of MIP-2 and interleukin-1β in the alveolar space. In vitro, GYY4137 did not exert toxic effects on Hoxb8 neutrophils, but prevented their transmigration through an endothelial barrier in the presence and absence of MIP-2. In addition, the release of MIP-2 and reactive oxygen species from LPS-stimulated Hoxb8 neutrophils were directly inhibited by H2S. Taken together, we provide first evidence that H2S limits lung neutrophil sequestration upon LPS challenge. As proposed underlying mechanisms, H2S prevents neutrophil transmigration through the inflamed endothelium and directly inhibits pro-inflammatory as well as oxidative signalling in neutrophils. Subsequently, H2S pretreatment ameliorates LPS-induced ALI.
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25
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Tanaka T, Narazaki M, Kishimoto T. Interleukin (IL-6) Immunotherapy. Cold Spring Harb Perspect Biol 2018; 10:cshperspect.a028456. [PMID: 28778870 DOI: 10.1101/cshperspect.a028456] [Citation(s) in RCA: 216] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Interleukin 6 (IL-6) is a prototypical cytokine for maintaining homeostasis. When homeostasis is disrupted by infections or tissue injuries, IL-6 is produced immediately and contributes to host defense against such emergent stress through activation of acute-phase and immune responses. However, dysregulated excessive and persistent synthesis of IL-6 has a pathological effect on, respectively, acute systemic inflammatory response syndrome and chronic immune-mediated diseases. The IL-6 inhibitor, tocilizumab, a humanized anti-IL-6 receptor antibody, is currently being used for the treatment of rheumatoid arthritis, juvenile idiopathic arthritis, and Castleman disease. Lines of recent evidence strongly suggest IL-6 blockade can provide broader therapeutic strategy for various diseases included in acute systemic and chronic inflammatory diseases.
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Affiliation(s)
- Toshio Tanaka
- Department of Clinical Application of Biologics, Osaka University Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan.,Department of Immunopathology, World Premier International Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan
| | - Masashi Narazaki
- Department of Immunopathology, World Premier International Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan.,Deparment of Respiratory Medicine, Allergy and Rheumatic Diseases, Osaka University Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Tadamitsu Kishimoto
- Laboratory of Immune Regulation, World Premier International Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan
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26
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Karsten CM, Beckmann T, Holtsche MM, Tillmann J, Tofern S, Schulze FS, Heppe EN, Ludwig RJ, Zillikens D, König IR, Köhl J, Schmidt E. Tissue Destruction in Bullous Pemphigoid Can Be Complement Independent and May Be Mitigated by C5aR2. Front Immunol 2018; 9:488. [PMID: 29599777 PMCID: PMC5862877 DOI: 10.3389/fimmu.2018.00488] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 02/23/2018] [Indexed: 12/12/2022] Open
Abstract
Bullous pemphigoid (BP), the most frequent autoimmune bullous disorder, is a paradigmatic autoantibody-mediated disease associated with autoantibodies against BP180 (type XVII collagen, Col17). Several animal models have been developed that reflect important clinical and immunological features of human BP. Complement activation has been described as a prerequisite for blister formation, however, the recent finding that skin lesions can be induced by anti-Col17 F(ab')2 fragments indicates complement-independent mechanisms to contribute to blister formation in BP. Here, C5-/- mice injected with anti-Col17 IgG showed a reduction of skin lesions by about 50% associated with significantly less skin-infiltrating neutrophils compared to wild-type mice. Reduction of skin lesions and neutrophil infiltration was seen independently of the employed anti-Col17 IgG dose. Further, C5ar1-/- mice were protected from disease development, whereas the extent of skin lesions was increased in C5ar2-/- animals. Pharmacological inhibition of C5a receptor 1 (C5aR1) by PMX53 led to reduced disease activity when applied in a prophylactic setting. In contrast, PMX-53 treatment had no effect when first skin lesions had already developed. While C5aR1 was critically involved in neutrophil migration in vitro, its role for Col17-anti-Col17 IgG immune complex-mediated release of reactive oxygen species from neutrophils was less pronounced. Our data demonstrate that complement-dependent and -independent mechanisms coexist in anti-Col17-autoantibody-mediated tissue destruction. C5aR1 and C5aR2 seem to play opposing roles in this process with C5aR1 exerting its primary effect in recruiting inflammatory cells to the skin during the early phase of the disease. Further studies are required to fully understand the role of C5aR2 in autoantibody-mediated skin inflammation.
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MESH Headings
- Animals
- Autoantibodies/genetics
- Autoantibodies/immunology
- Autoantigens/genetics
- Autoantigens/immunology
- Complement C5/genetics
- Complement C5/immunology
- Mice
- Mice, Inbred BALB C
- Mice, Knockout
- Neutrophil Infiltration
- Neutrophils/immunology
- Neutrophils/pathology
- Non-Fibrillar Collagens/genetics
- Non-Fibrillar Collagens/immunology
- Pemphigoid, Bullous/chemically induced
- Pemphigoid, Bullous/genetics
- Pemphigoid, Bullous/immunology
- Pemphigoid, Bullous/pathology
- Peptides, Cyclic/pharmacology
- Reactive Oxygen Species/immunology
- Receptor, Anaphylatoxin C5a/antagonists & inhibitors
- Receptor, Anaphylatoxin C5a/genetics
- Receptor, Anaphylatoxin C5a/immunology
- Skin/immunology
- Skin/pathology
- Collagen Type XVII
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Affiliation(s)
| | - Tina Beckmann
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | | | - Jenny Tillmann
- Institute of Systemic Inflammation, University of Lübeck, Lübeck, Germany
| | - Sabrina Tofern
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | - Franziska S. Schulze
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | - Eva Nina Heppe
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | - Ralf J. Ludwig
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | - Detlef Zillikens
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - Inke R. König
- Institute of Medical Biometry and Statistics, University of Lübeck, Lübeck, Germany
| | - Jörg Köhl
- Institute of Systemic Inflammation, University of Lübeck, Lübeck, Germany
- Division of Immunobiology, Cincinnati Children’s Hospital and College of Medicine, University of Cincinnati, Cincinnati, OH, United States
| | - Enno Schmidt
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
- Department of Dermatology, University of Lübeck, Lübeck, Germany
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27
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Roumenina LT, Rayes J, Frimat M, Fremeaux-Bacchi V. Endothelial cells: source, barrier, and target of defensive mediators. Immunol Rev 2017; 274:307-329. [PMID: 27782324 DOI: 10.1111/imr.12479] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Endothelium is strategically located at the interface between blood and interstitial tissues, placing thus endothelial cell as a key player in vascular homeostasis. Endothelial cells are in a dynamic equilibrium with their environment and constitute concomitantly a source, a barrier, and a target of defensive mediators. This review will discuss the recent advances in our understanding of the complex crosstalk between the endothelium, the complement system and the hemostasis in health and in disease. The first part will provide a general introduction on endothelial cells heterogeneity and on the physiologic role of the complement and hemostatic systems. The second part will analyze the interplay between complement, hemostasis and endothelial cells in physiological conditions and their alterations in diseases. Particular focus will be made on the prototypes of thrombotic microangiopathic disorders, resulting from complement or hemostasis dysregulation-mediated endothelial damage: atypical hemolytic uremic syndrome and thrombotic thrombocytopenic purpura. Novel aspects of the pathophysiology of the thrombotic microangiopathies will be discussed.
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Affiliation(s)
- Lubka T Roumenina
- INSERM UMRS 1138, Cordeliers Research Center, Université Pierre et Marie Curie (UPMC-Paris-6) and Université Paris Descartes Sorbonne Paris-Cité, Paris, France.
| | - Julie Rayes
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Marie Frimat
- INSERM UMR 995, Lille, France.,Nephrology Department, CHU Lille, Lille, France
| | - Veronique Fremeaux-Bacchi
- INSERM UMRS 1138, Cordeliers Research Center, Université Pierre et Marie Curie (UPMC-Paris-6) and Université Paris Descartes Sorbonne Paris-Cité, Paris, France.,Assistance Publique - Hôpitaux de Paris, Service d'Immunologie Biologique, Hôpital Européen Georges Pompidou, Paris, France
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28
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Novel insights into the expression pattern of anaphylatoxin receptors in mice and men. Mol Immunol 2017; 89:44-58. [PMID: 28600003 DOI: 10.1016/j.molimm.2017.05.019] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 05/22/2017] [Accepted: 05/23/2017] [Indexed: 02/06/2023]
Abstract
The anaphylatoxins (AT) C3a and C5a play important roles as mediators of inflammation. Further, they regulate and control multiple innate and adaptive immune responses through binding and activation of their cognate G protein-coupled receptors, i.e. C3a receptor (C3aR), C5a receptor 1 (C5aR1) and C5a receptor 2 (C5aR2), although the latter lacks important sequence motifs for G protein-coupling. Based on their pleiotropic functions, they contribute not only to tissue homeostasis but drive, perpetuate and resolve immune responses in many inflammatory diseases including infections, malignancies, autoimmune as well as allergic diseases. During the past few years, transcriptome expression data provided detailed insights into AT receptor tissue mRNA expression. In contrast, our understanding of cellular AT receptor expression in human and mouse tissues under steady and inflammatory conditions is still sketchy. Ligand binding studies, flow cytometric and immunohistochemical analyses convincingly demonstrated tissue-specific C5aR1 expression in various cells of myeloid origin. However, a detailed map for C3aR or C5aR2 expression in human or mouse tissue cells is still lacking. Also, reports about AT expression in lymphoid cells is still controversial. To understand the multiple roles of the ATs in the innate and adaptive immune networks, a detailed understanding of their receptor expression in health and disease is required. Recent findings obtained with novel GFP or tdTomato AT-receptor knock-in mice provide detailed insights into their expression pattern in tissue immune and stroma cells. Here, we will provide an update about our current knowledge of AT receptor expression pattern in humans and mice.
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29
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Khameneh HJ, Ho AWS, Laudisi F, Derks H, Kandasamy M, Sivasankar B, Teng GG, Mortellaro A. C5a Regulates IL-1β Production and Leukocyte Recruitment in a Murine Model of Monosodium Urate Crystal-Induced Peritonitis. Front Pharmacol 2017; 8:10. [PMID: 28167912 PMCID: PMC5253373 DOI: 10.3389/fphar.2017.00010] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 01/04/2017] [Indexed: 12/31/2022] Open
Abstract
Gouty arthritis results from the generation of monosodium urate (MSU) crystals within joints. These MSU crystals elicit acute inflammation characterized by massive infiltration of neutrophils and monocytes that are mobilized by the pro-inflammatory cytokine IL-1β. MSU crystals also activate the complement system, which regulates the inflammatory response; however, it is unclear whether or how MSU-mediated complement activation is linked to IL-1β release in vivo, and the various roles that might be played by individual components of the complement cascade. Here we show that exposure to MSU crystals in vivo triggers the complement cascade, leading to the generation of the biologically active complement proteins C3a and C5a. C5a, but not C3a, potentiated IL-1β and IL-1α release from LPS–primed MSU-exposed peritoneal macrophages and human monocytic cells in vitro; while in vivo MSU–induced C5a mediated murine neutrophil recruitment as well as IL-1β production at the site of inflammation. These effects were significantly ameliorated by treatment of mice with a C5a receptor antagonist. Mechanistic studies revealed that C5a most likely increased NLRP3 inflammasome activation via production of reactive oxygen species (ROS), and not through increased transcription of inflammasome components. Therefore we conclude that C5a generated upon MSU-induced complement activation increases neutrophil recruitment in vivo by promoting IL-1 production via the generation of ROS, which activate the NLRP3 inflammasome. Identification of the C5a receptor as a key determinant of IL-1-mediated recruitment of inflammatory cells provides a novel potential target for therapeutic intervention to mitigate gouty arthritis.
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Affiliation(s)
- Hanif J Khameneh
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR) Singapore, Singapore
| | - Adrian W S Ho
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR) Singapore, Singapore
| | - Federica Laudisi
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR) Singapore, Singapore
| | - Heidi Derks
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR) Singapore, Singapore
| | - Matheswaran Kandasamy
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (ASTAR) Singapore, Singapore
| | - Baalasubramanian Sivasankar
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (ASTAR) Singapore, Singapore
| | - Gim Gee Teng
- Division of Rheumatology, University Medicine Cluster, National University Health System (NUHS)Singapore, Singapore; Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore (NUS) and National University Health System (NUHS)Singapore, Singapore
| | - Alessandra Mortellaro
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR) Singapore, Singapore
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30
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C5a and pain development: An old molecule, a new target. Pharmacol Res 2016; 112:58-67. [DOI: 10.1016/j.phrs.2016.02.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 02/01/2016] [Accepted: 02/02/2016] [Indexed: 12/13/2022]
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31
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Nitta H, Shimose T, Emi Y, Imamura T, Ohnishi K, Kusumoto T, Yamamoto M, Fukuzawa K, Takahashi I, Higashi H, Tsuji A, Akagi Y, Oki E, Maehara Y, Baba H. Expression of the anaphylatoxin C5a receptor in gastric cancer: implications for vascular invasion and patient outcomes. Med Oncol 2016; 33:118. [DOI: 10.1007/s12032-016-0834-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 09/24/2016] [Indexed: 02/06/2023]
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32
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Kalbitz M, Karbach M, Braumueller S, Kellermann P, Gebhard F, Huber-Lang M, Perl M. Role of Complement C5 in Experimental Blunt Chest Trauma-Induced Septic Acute Lung Injury (ALI). PLoS One 2016; 11:e0159417. [PMID: 27437704 PMCID: PMC4954719 DOI: 10.1371/journal.pone.0159417] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 07/01/2016] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Severe blunt chest trauma is associated with high mortality. Sepsis represents a serious risk factor for mortality in acute respiratory distress syndrome (ARDS). In septic patients with ARDS complement activation products were found to be elevated in the plasma. In single models like LPS or trauma complement has been studied to some degree, however in clinically highly relevant double hit models such as the one used here little data is available. Here, we hypothesized that absence of C5 is correlated with a decreased inflammatory response in trauma induced septic acute lung injury. METHODS 12 hrs after DH in mice the local and systemic cytokines and chemokines were quantified by multiplex bead array or ELISA, activated caspase-3 by western blot. Data were analyzed using one-way ANOVA followed by post-hoc Sidak's multiple comparison test (significance, p≤ 0.05). RESULTS In lung tissue interleukin (IL)-6, monocyte chemo attractant protein-1 (MCP-1) and granulocyte-colony stimulating factor (G-CSF) was elevated in both C5-/- mice and wildtype littermates (wt), whereas caspase-3 was reduced in lungs after DH in C5-/- mice. Systemically, reduced keratinocyte-derived chemokine (KC) levels were observed after DH in C5-/- compared to wt mice. Locally, lung myeloperoxidase (MPO), protein, IL-6, MCP-1 and G-CSF in brochoalveolar lavage fluid (BALF) were elevated after DH in C5-/- compared to wt. CONCLUSIONS In the complex but clinically relevant DH model the local and systemic inflammatory immune response features both, C5-dependent and C5-independent characteristics. Activation of caspase-3 in lung tissue after DH was C5-dependent whereas local inflammation in lung tissue was C5-independent.
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Affiliation(s)
- Miriam Kalbitz
- Department of Traumatology, Hand-, Plastic-, and Reconstructive Surgery, Center of Surgery, University of Ulm, Ulm, Germany
| | - Michael Karbach
- Department of Traumatology, Hand-, Plastic-, and Reconstructive Surgery, Center of Surgery, University of Ulm, Ulm, Germany
| | - Sonja Braumueller
- Department of Traumatology, Hand-, Plastic-, and Reconstructive Surgery, Center of Surgery, University of Ulm, Ulm, Germany
| | - Philipp Kellermann
- Department of Traumatology, Hand-, Plastic-, and Reconstructive Surgery, Center of Surgery, University of Ulm, Ulm, Germany
| | - Florian Gebhard
- Department of Traumatology, Hand-, Plastic-, and Reconstructive Surgery, Center of Surgery, University of Ulm, Ulm, Germany
| | - Markus Huber-Lang
- Department of Traumatology, Hand-, Plastic-, and Reconstructive Surgery, Center of Surgery, University of Ulm, Ulm, Germany
| | - Mario Perl
- Department of Traumatology, Hand-, Plastic-, and Reconstructive Surgery, Center of Surgery, University of Ulm, Ulm, Germany
- Orthopedic Trauma, BG-Trauma Center Murnau, Murnau, Germany
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33
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Tanaka T, Narazaki M, Kishimoto T. Immunotherapeutic implications of IL-6 blockade for cytokine storm. Immunotherapy 2016; 8:959-70. [DOI: 10.2217/imt-2016-0020] [Citation(s) in RCA: 411] [Impact Index Per Article: 51.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
IL-6 contributes to host defense against infections and tissue injuries. However, exaggerated, excessive synthesis of IL-6 while fighting environmental stress leads to an acute severe systemic inflammatory response known as ‘cytokine storm’, since high levels of IL-6 can activate the coagulation pathway and vascular endothelial cells but inhibit myocardial function. Remarkable beneficial effects of IL-6 blockade therapy using a humanized anti-IL-6 receptor antibody, tocilizumab were recently observed in patients with cytokine release syndrome complicated by T-cell engaged therapy. In this review we propose the possibility that IL-6 blockade may constitute a novel therapeutic strategy for other types of cytokine storm, such as the systemic inflammatory response syndrome including sepsis, macrophage activation syndrome and hemophagocytic lymphohistiocytosis.
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Affiliation(s)
- Toshio Tanaka
- Department of Clinical Application of Biologics, Osaka University Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Respiratory Medicine, Allergy & Rheumatic Diseases, Osaka University Graduate School of Medicine, Osaka University, Japan
| | - Masashi Narazaki
- Department of Respiratory Medicine, Allergy & Rheumatic Diseases, Osaka University Graduate School of Medicine, Osaka University, Japan
| | - Tadamitsu Kishimoto
- Laboratory of Immune Regulation, World Premier International Immunology Frontier Research Center, Osaka University, Osaka, Japan
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34
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Stites E, Le Quintrec M, Thurman JM. The Complement System and Antibody-Mediated Transplant Rejection. THE JOURNAL OF IMMUNOLOGY 2016; 195:5525-31. [PMID: 26637661 DOI: 10.4049/jimmunol.1501686] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Complement activation is an important cause of tissue injury in patients with Ab-mediated rejection (AMR) of transplanted organs. Complement activation triggers a strong inflammatory response, and it also generates tissue-bound and soluble fragments that are clinically useful markers of inflammation. The detection of complement proteins deposited within transplanted tissues has become an indispensible biomarker of AMR, and several assays have recently been developed to measure complement activation by Abs reactive to specific donor HLA expressed within the transplant. Complement inhibitors have entered clinical use and have shown efficacy for the treatment of AMR. New methods of detecting complement activation within transplanted organs will improve our ability to diagnose and monitor AMR, and they will also help guide the use of complement inhibitory drugs.
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Affiliation(s)
- Erik Stites
- Department of Medicine, University of Colorado School of Medicine, Aurora, CO 80045; and
| | - Moglie Le Quintrec
- Department of Nephrology and Renal Transplantation, Lapeyronie Hospital, 34295 Montpellier Cedex 5, France
| | - Joshua M Thurman
- Department of Medicine, University of Colorado School of Medicine, Aurora, CO 80045; and
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35
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Sakuma Y, Nagai T, Yoshio T, Hirohata S. Differential activation mechanisms of serum C5a in lupus nephritis and neuropsychiatric systemic lupus erythematosus. Mod Rheumatol 2016; 27:292-297. [PMID: 27319578 DOI: 10.1080/14397595.2016.1193965] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
OBJECTIVE To explore the role of C5a in the pathogenesis of neuropsychiatric systemic lupus erythematosus (NPSLE) and lupus nephritis (LN). METHODS Sera were obtained from 29 patients with NPSLE, 25 with LN, 26 without NPSLE or LN [SLE alone], and 21 healthy donors. Cerebrospinal fluid (CSF) was obtained from 29 NPSLE patients. C5a and C5 were measured by ELISA. Blood-brain barrier (BBB) function was evaluated by Q albumin ([CSF albumin/serum albumin] × 103). RESULTS Serum C5a, but not C5, was significantly increased in SLE compared with healthy control. Serum C5a, but not C5, was significantly higher in NPSLE and in LN than in SLE alone. Serum C4, but not C3, was lower in LN than in NPSLE. Q albumin was significantly higher in diffuse NPSLE than in focal NPSLE, whereas there were no significant differences in CSF or serum C5a between both groups. Notably, CSF C5 and C5a were significantly correlated with Q albumin, whereas serum C5a, but not C5, appeared to be inversely correlated with Q albumin. CONCLUSION These results disclosed that serum C5a was elevated not only in NPSLE but also in LN through different mechanisms. Moreover, it is suggested that C5a might be consumed during BBB damages.
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Affiliation(s)
- Yuko Sakuma
- a Department of Rheumatology and Infectious Diseases , Kitasato University School of Medicine , Kanagawa , Japan and
| | - Tatsuo Nagai
- a Department of Rheumatology and Infectious Diseases , Kitasato University School of Medicine , Kanagawa , Japan and
| | - Taku Yoshio
- b Division of Rheumatology and Clinical Immunology , Jichi Medical University , Tochigi , Japan
| | - Shunsei Hirohata
- a Department of Rheumatology and Infectious Diseases , Kitasato University School of Medicine , Kanagawa , Japan and
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Verma SK, Molitoris BA. Renal endothelial injury and microvascular dysfunction in acute kidney injury. Semin Nephrol 2015; 35:96-107. [PMID: 25795503 DOI: 10.1016/j.semnephrol.2015.01.010] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The kidney is comprised of heterogeneous cell populations that function together to perform a number of tightly controlled, complex and interdependent processes. Renal endothelial cells contribute to vascular tone, regulation of blood flow to local tissue beds, modulation of coagulation and inflammation, and vascular permeability. Both ischemia and sepsis have profound effects on the renal endothelium, resulting in microvascular dysregulation resulting in continued ischemia and further injury. In recent years, the concept of the vascular endothelium as an organ that is both the source of and target for inflammatory injury has become widely appreciated. Here we revisit the renal endothelium in the light of ever evolving molecular advances.
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Affiliation(s)
- Sudhanshu Kumar Verma
- Nephrology Division, Department of Medicine, Indiana University School of Medicine, The Roudebush VA Medical Center, Indiana Center for Biological Microscopy, Indianapolis, IN
| | - Bruce A Molitoris
- Nephrology Division, Department of Medicine, Indiana University School of Medicine, The Roudebush VA Medical Center, Indiana Center for Biological Microscopy, Indianapolis, IN.
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Askenase PW, Bryniarski K, Paliwal V, Redegeld F, Groot Kormelink T, Kerfoot S, Hutchinson AT, van Loveren H, Campos R, Itakura A, Majewska-Szczepanik M, Yamamoto N, Nazimek K, Szczepanik M, Ptak W. A subset of AID-dependent B-1a cells initiates hypersensitivity and pneumococcal pneumonia resistance. Ann N Y Acad Sci 2015; 1362:200-14. [PMID: 26662721 PMCID: PMC4681304 DOI: 10.1111/nyas.12975] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 08/20/2015] [Accepted: 10/25/2015] [Indexed: 12/31/2022]
Abstract
We propose that there is a special B-1a B cell subset ("sB-1a" cells) that mediates linked processes very early after immunization to initiate cutaneous contact sensitivity (CS), delayed-type hypersensitivity (DTH), and immune resistance to pneumococcal pneumonia. Our published data indicate that in CS and DTH, these initiating processes are required for elicitation of the delayed onset and late-occurring classical T cell-mediated responses. sB-1a cells resemble memory B2 cells, as they are stimulated within 1 h of immunization and depend on T helper cytokines-uniquely IL-4 from hepatic iNKT cells--for activation and rapid migration from the peritoneal cavity to the spleen to secrete IgM antibody (Ab) and Ab-derived free light chains (FLCs) by only 1 day after immunization. Unlike conventional B-1a (cB-1a) cell-produced IgM natural Ab, IgM Ab produced by sB-1a cells has high Ag affinity owing to immunoglobulin V-region mutations induced by activation-induced cytidine deaminase (AID). The dominant cB-1a cells are increased in immunized AID-deficient mice but do not mediate initiation, CS, or pneumonia resistance because natural Ab has relatively low Ag affinity because of unmutated germ-line V regions. In CS and DTH, sB-1a IgM Ag affinity is sufficiently high to mediate complement activation for generation of C5a that, together with vasoactive mediators such as TNF-α released by FLC-sensitized mast cells, activate local endothelium for extravascular recruitment of effector T cells. We conclude by discussing the possibility of functional sB-1 cells in humans.
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Affiliation(s)
- Phillip W Askenase
- Department of Internal Medicine, Section of Allergy and Clinical Immunology, Yale University School of Medicine, New Haven, Connecticut
| | - Krzysztof Bryniarski
- Department of Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Vipin Paliwal
- Department of Internal Medicine, Section of Allergy and Clinical Immunology, Yale University School of Medicine, New Haven, Connecticut
| | - Frank Redegeld
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, the Netherlands
| | - Thomas Groot Kormelink
- Department of Internal Medicine, Section of Allergy and Clinical Immunology, Yale University School of Medicine, New Haven, Connecticut
| | - Steven Kerfoot
- Department of Internal Medicine, Section of Allergy and Clinical Immunology, Yale University School of Medicine, New Haven, Connecticut
| | - Andrew T Hutchinson
- Department of Internal Medicine, Section of Allergy and Clinical Immunology, Yale University School of Medicine, New Haven, Connecticut
| | - Henk van Loveren
- Department of Internal Medicine, Section of Allergy and Clinical Immunology, Yale University School of Medicine, New Haven, Connecticut
| | - Regis Campos
- Department of Internal Medicine, Section of Allergy and Clinical Immunology, Yale University School of Medicine, New Haven, Connecticut
| | - Atsuko Itakura
- Department of Internal Medicine, Section of Allergy and Clinical Immunology, Yale University School of Medicine, New Haven, Connecticut
| | | | - Natsuo Yamamoto
- Department of Infection Control and Laboratory Medicine, Fukushima Medical University, Fukushima, Japan
| | - Katarzyn Nazimek
- Department of Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Marian Szczepanik
- Department of Medical Biology, Jagiellonian University Medical College, Kraków, Poland
| | - Wold Ptak
- Department of Immunology, Jagiellonian University Medical College, Kraków, Poland
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Schraufstatter IU, Khaldoyanidi SK, DiScipio RG. Complement activation in the context of stem cells and tissue repair. World J Stem Cells 2015; 7:1090-1108. [PMID: 26435769 PMCID: PMC4591784 DOI: 10.4252/wjsc.v7.i8.1090] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 07/27/2015] [Indexed: 02/06/2023] Open
Abstract
The complement pathway is best known for its role in immune surveillance and inflammation. However, its ability of opsonizing and removing not only pathogens, but also necrotic and apoptotic cells, is a phylogenetically ancient means of initiating tissue repair. The means and mechanisms of complement-mediated tissue repair are discussed in this review. There is increasing evidence that complement activation contributes to tissue repair at several levels. These range from the chemo-attraction of stem and progenitor cells to areas of complement activation, to increased survival of various cell types in the presence of split products of complement, and to the production of trophic factors by cells activated by the anaphylatoxins C3a and C5a. This repair aspect of complement biology has not found sufficient appreciation until recently. The following will examine this aspect of complement biology with an emphasis on the anaphylatoxins C3a and C5a.
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Tsai IJ, Chou CH, Yang YH, Lin WC, Lin YH, Chow LP, Lee HH, Kao PG, Liau WT, Jou TS, Tsau YK. Inhibition of Rho-associated kinase relieves C5a-induced proteinuria in murine nephrotic syndrome. Cell Mol Life Sci 2015; 72:3157-71. [PMID: 25790939 PMCID: PMC11113791 DOI: 10.1007/s00018-015-1888-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Revised: 02/14/2015] [Accepted: 03/13/2015] [Indexed: 02/05/2023]
Abstract
Childhood nephrotic syndrome is mainly caused by minimal change disease which is named because only subtle ultrastructural alteration could be observed at electron microscopic level in the pathological kidney. Glomerular podocytes are presumed to be the target cells whose protein sieving capability is compromised by a yet unidentified permeability perturbing factor. In a cohort of children with non-hereditary idiopathic nephrotic syndrome, we found the complement fragment C5a was elevated in their sera during active disease. Administration of recombinant C5a induced profound proteinuria and minimal change nephrotic syndrome in mice. Purified glomerular endothelial cells, instead of podocytes, were demonstrated to be responsible for the proteinuric effect elicited by C5a. Further studies depicted a signaling pathway involving Rho/Rho-associated kinase/myosin activation leading to endothelial cell contraction and cell adhesion complex breakdown. Significantly, application of Rho-associated kinase inhibitor, Y27632, prevented the protein leaking effects observed in both C5a-treated purified endothelial cells and mice. Taken together, our study identifies a previously unknown mechanism underlying nephrotic syndrome and provides a new insight toward identifying Rho-associated kinase inhibition as an alternative therapeutic option for nephrotic syndrome.
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Affiliation(s)
- I-Jung Tsai
- Department of Pediatrics, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Chia-Hung Chou
- Department of Obstetrics and Gynecology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yao-Hsu Yang
- Department of Pediatrics, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Wei-Chou Lin
- Department of Pathology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yen-Hung Lin
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Lu-Ping Chow
- Graduate Institute of Biochemistry and Molecular Biology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Hsiao-Hui Lee
- Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Pei-Gang Kao
- Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Wan-Ting Liau
- Department of Obstetrics and Gynecology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Tzuu-Shuh Jou
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
- Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yong-Kwei Tsau
- Department of Pediatrics, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
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Selle J, Asare Y, Köhncke J, Alampour-Rajabi S, Shagdarsuren G, Klos A, Weber C, Jankowski J, Shagdarsuren E. Atheroprotective role of C5ar2 deficiency in apolipoprotein E-deficient mice. Thromb Haemost 2015; 114:848-58. [PMID: 26084965 DOI: 10.1160/th14-12-1075] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 05/20/2015] [Indexed: 12/22/2022]
Abstract
Atherogenic processes and vascular remodelling after arterial injury are controlled and driven by a plethora of factors amongst which the activation of the complement system is pivotal. Recently, we reported a clear correlation between high expressions of the second receptor for complement anaphylatoxin C5a, the C5a receptor-like 2 (C5L2, C5aR2), with high pro-inflammatory cytokine expression in advanced human atherosclerotic plaques. This prompted us to speculate that C5aR2 might have a functional role in atherosclerosis. We, therefore, investigated the role of C5aR2 in atherosclerosis and vascular remodelling. Here, we demonstrate that C5ar2 deletion, in atherosclerosis-prone mice, attenuates atherosclerotic as well as neointimal plaque formation, reduces macrophages and CD3+ T cells and induces features of plaque stability, as analysed by histomorphometry and quantitative immunohistochemistry. As a possible underlying mechanism, C5ar2-deficient plaques showed significantly reduced expression of C5a receptor (C5ar1), Tnf-α as well as Vcam-1, as determined by qPCR and quantitative immunohistochemistry. In addition, in vitro mechanistic studies revealed a reduction of these pro-inflammatory and pro-atherosclerotic mediators in C5ar2-deficient macrophages. Finally, blocking C5ar1 with antagonist JPE1375, in C5ar2(-/-)/Apoe(-/-) mice, led to a further reduction in neointimal plaque formation with reduced inflammation. In conclusion, C5ar2 deficiency attenuates atherosclerosis and neointimal plaque formation after arterial injury. This identifies C5aR2 as a promising target to reduce atherosclerosis and restenosis after vascular interventions.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Erdenechimeg Shagdarsuren
- Erdenechimeg Shagdarsuren, MD, Institute for Molecular Cardiovascular Research, Universitätsklinikum der RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany, Tel.: +49 241 8036584, Fax: +49 241 8082703, E-mail:
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Shao Z, Nishimura T, Leung LLK, Morser J. Carboxypeptidase B2 deficiency reveals opposite effects of complement C3a and C5a in a murine polymicrobial sepsis model. J Thromb Haemost 2015; 13:1090-102. [PMID: 25851247 PMCID: PMC4452409 DOI: 10.1111/jth.12956] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 03/18/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVES Carboxypeptidase B2 (CPB2) is a basic carboxypeptidase with fibrin and complement C3a and C5a as physiological substrates. We hypothesized that in polymicrobial sepsis, CPB2-deficient mice would have sustained C5a activity, leading to disease exacerbation. METHODS Polymicrobial sepsis was induced by cecal ligation and puncture (CLP). RESULTS Contrary to our hypothesis, Cpb2(-/-) mice had significantly improved survival, with reduced lung edema, less liver and kidney damage, and less disseminated intravascular coagulation. Hepatic pro-CPB2 was induced by CLP, leading to increased pro-CPB2 levels. Thrombomodulin present on mesothelium supported thrombin activation of pro-CPB2. Both wild-type and Cpb2(-/-) animals treated with a C5a receptor antagonist had improved survival, demonstrating that C5a was detrimental in this model. Treatment with a fibrinolysis inhibitor, tranexamic acid, caused a decrease in survival in both genotypes; however, the Cpb2(-/-) animals retained their survival advantage. Administration of a C3a receptor antagonist exacerbated the disease in both wild-type and Cpb2(-/-) mice and eliminated the survival advantage of Cpb2(-/-) mice. C5a receptor is expressed in both peritoneal macrophages and neutrophils; in contrast, C3a receptor expression is restricted to peritoneal macrophages, and C3a induced signaling in macrophages but not neutrophils. CONCLUSIONS While C5a exacerbates the peritonitis, resulting in a deleterious generalized inflammatory state, C3a activation of peritoneal macrophages may limit the initial infection following CLP, thereby playing a diametrically opposing protective role in this polymicrobial sepsis model.
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Affiliation(s)
- Z. Shao
- Stanford University School of Medicine, Division of Hematology, Department of Medicine, Stanford, CA 94305, USA and Veterans Affairs Palo Alto Health Care System, Palo Alto, CA 94304, USA
| | - T. Nishimura
- Stanford University School of Medicine, Department of Anesthesiology, Stanford, CA 94305, USA
| | - L. L. K. Leung
- Stanford University School of Medicine, Division of Hematology, Department of Medicine, Stanford, CA 94305, USA and Veterans Affairs Palo Alto Health Care System, Palo Alto, CA 94304, USA
| | - J. Morser
- Stanford University School of Medicine, Division of Hematology, Department of Medicine, Stanford, CA 94305, USA and Veterans Affairs Palo Alto Health Care System, Palo Alto, CA 94304, USA
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Yatime L, Maasch C, Hoehlig K, Klussmann S, Andersen GR, Vater A. Structural basis for the targeting of complement anaphylatoxin C5a using a mixed L-RNA/L-DNA aptamer. Nat Commun 2015; 6:6481. [PMID: 25901944 PMCID: PMC4423239 DOI: 10.1038/ncomms7481] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 02/02/2015] [Indexed: 11/25/2022] Open
Abstract
L-Oligonucleotide aptamers (Spiegelmers) consist of non-natural L-configured nucleotides and are of particular therapeutic interest due to their high resistance to plasma nucleases. The anaphylatoxin C5a, a potent inflammatory mediator generated during complement activation that has been implicated with organ damage, can be efficiently targeted by Spiegelmers. Here, we present the first crystallographic structures of an active Spiegelmer, NOX-D20, bound to its physiological targets, mouse C5a and C5a-desArg. The structures reveal a complex 3D architecture for the L-aptamer that wraps around C5a, including an intramolecular G-quadruplex stabilized by a central Ca(2+) ion. Functional validation of the observed L-aptamer:C5a binding mode through mutational studies also rationalizes the specificity of NOX-D20 for mouse and human C5a against macaque and rat C5a. Finally, our structural model provides the molecular basis for the Spiegelmer affinity improvement through positional L-ribonucleotide to L-deoxyribonucleotide exchanges and for its inhibition of the C5a:C5aR interaction.
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Affiliation(s)
- Laure Yatime
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10C, DK-8000 Aarhus, Denmark
| | | | - Kai Hoehlig
- NOXXON Pharma AG, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Sven Klussmann
- NOXXON Pharma AG, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Gregers R. Andersen
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10C, DK-8000 Aarhus, Denmark
| | - Axel Vater
- NOXXON Pharma AG, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
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Günesacar R, Opelz G, Erken E, Döhler B, Ruhenstroth A, Süsal C. Complement C5a receptor gene 450 C/T polymorphism in renal transplant recipients: association of the CT genotype with graft outcome. ACTA ACUST UNITED AC 2015; 85:104-7. [DOI: 10.1111/tan.12495] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 11/26/2014] [Accepted: 11/30/2014] [Indexed: 11/28/2022]
Affiliation(s)
- R. Günesacar
- Department of Medical Biology and Genetics, Faculty of Medicine; University of Kahramanmaras Sütcü Imam; Kahramanmaras Turkey
- Department of Transplantation Immunology, Institute of Immunology; University of Heidelberg; Heidelberg Germany
| | - G. Opelz
- Department of Transplantation Immunology, Institute of Immunology; University of Heidelberg; Heidelberg Germany
| | - E. Erken
- Department of Immunology-Rheumatology, Faculty of Medicine; University of Cukurova; Adana Turkey
| | - B. Döhler
- Department of Transplantation Immunology, Institute of Immunology; University of Heidelberg; Heidelberg Germany
| | - A. Ruhenstroth
- Department of Transplantation Immunology, Institute of Immunology; University of Heidelberg; Heidelberg Germany
| | - C. Süsal
- Department of Transplantation Immunology, Institute of Immunology; University of Heidelberg; Heidelberg Germany
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Kourtzelis I, Ferreira A, Mitroulis I, Ricklin D, Bornstein SR, Waskow C, Lambris JD, Chavakis T. Complement inhibition in a xenogeneic model of interactions between human whole blood and porcine endothelium. Horm Metab Res 2015; 47:36-42. [PMID: 25350518 PMCID: PMC4383746 DOI: 10.1055/s-0034-1390452] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Xenotransplantation (xeno-Tx) is considered as an alternative solution to overcome the shortage of human donor organs. However, the success of xeno-Tx is hindered by immune reactions against xenogeneic cells (e. g. of porcine origin). More specifically, activation of innate immune mechanisms such as complement and triggering of the coagulation cascade occur shortly after xeno-Tx, and adhesion of human leukocytes to porcine endothelium is another early critical step mediating the immune attack. To investigate the therapeutic potential of complement inhibition in the context of xenogeneic interactions, we have employed a whole-blood model in the present study. Incubation of human blood with porcine endothelial cells (PAECs) led to activation of complement and coagulation as well as to increased leukocyte adhesion. The observed responses can be attributed to the pig-to-human xenogeneicity, since the presence of human endothelium induced a minor cellular and plasmatic inflammatory response. Importantly, complement inhibition using a potent complement C3 inhibitor, compstatin analogue Cp40, abrogated the adhesion of leukocytes and, more specifically, the attachment of neutrophils to porcine endothelium. Moreover, Cp40 inhibited the activation of PAECs and leukocytes, since the levels of the adhesion molecules E-selectin, ICAM-1, ICAM-2, and VCAM-1 on PAECs and the surface expression of integrin CD11b on neutrophils were significantly decreased. Along the same line, inhibition of CD11b resulted in decreased leukocyte adhesion. Taken together, our findings provide a better understanding of the mechanisms regulating the acute innate immune complications in the context of xeno-Tx and could pave the way for complement-targeting therapeutic interventions.
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Affiliation(s)
- I. Kourtzelis
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, Dresden, Germany
| | - A. Ferreira
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, Dresden, Germany
| | - I. Mitroulis
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, Dresden, Germany
- Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - D. Ricklin
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - S. R. Bornstein
- Department of Internal Medicine, Technische Universität Dresden, Dresden, Germany
| | - C. Waskow
- Regeneration in Hematopoiesis and Animal Models in Hematopoiesis, Institute of Immunology, Medical Faculty, Technische Universität Dresden, Dresden, Germany
| | - J. D. Lambris
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - T. Chavakis
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, Dresden, Germany
- Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
- Department of Internal Medicine, Technische Universität Dresden, Dresden, Germany
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Xu H, Wang J, Wang C, Chang G, Lin Y, Zhang H, Zhang H, Li Q, Pang T. Therapeutic effects of micheliolide on a murine model of rheumatoid arthritis. Mol Med Rep 2014; 11:489-93. [PMID: 25351212 DOI: 10.3892/mmr.2014.2767] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 09/29/2014] [Indexed: 11/06/2022] Open
Abstract
Rheumatoid arthritis (RA) is a systemic autoimmune disease and collagen-induced arthritis (CIA) is an animal model for RA. Micheliolide (MCL) is a novel compound with strong anti-inflammatory effects. The present study was conducted to evaluate the therapeutic effects of MCL on RA. Mice were randomly divided into four groups and the CIA model mice were treated with methotrexate (MTX), MCL and dimethyl sulfoxide. A score associated with the severity of arthritis was assigned on alternate days from the 22nd day for 60 days. Histopathological changes and the serum levels of cytokines were measured on day 85. The results demonstrated that the MCL treatment group had arthritis scores lower than the CIA group and higher than the MTX group; compared with the CIA group, MCL and MTX significantly reduced the swelling of the paws and suppressed the degeneration of articular cartilage. Expression levels of macrophage colony-stimulating factor (M-CSF), tissue inhibitors of metalloproteinases-1 (TIMP-1) and complement component 5a (C5/C5a) were lower in the mice with arthritis compared with normal mice, however, following treatment with MCL and MTX, all the mice exhibited significant recovery to differing degrees. Unlike the MTX group, the MCL group failed to recover the level of soluble intercellular adhesion molecule-1. In addition, the cytokine of B-lymphocyte chemoattractant (BLC) solely presented in the MCL group. These results suggest that MCL may be considered for use as a novel therapeutic treatment against RA and that changes in the expression of cytokines C5/C5a, TIMP-1, M-CSF and BLC may underlie the mechanism by which MCL effects changes in this disease.
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Affiliation(s)
- Hua Xu
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, P.R. China
| | - Jian Wang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, P.R. China
| | - Chijuan Wang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, P.R. China
| | - Guoqiang Chang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, P.R. China
| | - Yani Lin
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, P.R. China
| | - Hongju Zhang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, P.R. China
| | - Hairui Zhang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, P.R. China
| | - Qinghua Li
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, P.R. China
| | - Tianxiang Pang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, P.R. China
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Role of C5a-C5aR axis in the development of atherosclerosis. SCIENCE CHINA-LIFE SCIENCES 2014; 57:790-4. [DOI: 10.1007/s11427-014-4711-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 07/08/2014] [Indexed: 12/29/2022]
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Vijayan S, Asare Y, Grommes J, Soehnlein O, Lutgens E, Shagdarsuren G, Togtokh A, Jacobs MJ, Fischer JW, Bernhagen J, Weber C, Schober A, Shagdarsuren E. High expression of C5L2 correlates with high proinflammatory cytokine expression in advanced human atherosclerotic plaques. THE AMERICAN JOURNAL OF PATHOLOGY 2014; 184:2123-33. [PMID: 24819959 DOI: 10.1016/j.ajpath.2014.04.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 03/25/2014] [Accepted: 04/07/2014] [Indexed: 12/21/2022]
Abstract
The complement anaphylatoxin C5a functions through its two receptors, C5aR (CD88) and C5a receptor-like 2 (C5L2). Their role in atherosclerosis is incompletely understood. We, therefore, analyzed C5aR and probed the yet unknown expression and function of C5L2 in human atherogenesis. Human atherosclerotic plaques obtained by endarterectomy were staged and analyzed for C5L2 and C5aR by IHC and quantitative real-time PCR. C5L2-expressing cells in plaques were mostly macrophages, less neutrophils and endothelial cells, as determined by double immunostaining. Although early influx of C5aR(+) cells was detected, C5L2 levels increased with lesion complexity and colocalized with C5aR and oxidized low-density lipoprotein. Gene expression of C5L2 and C5aR showed similar trends, such as the receptor-expressing cells. The expression of C5L2 in advanced lesions correlated with increased levels of IL-1β and tumor necrosis factor-α in plaques. Furthermore, in vitro experiments in macrophages from wild-type and C5l2- and C5ar-deficient mice corroborated the contributing role of C5l2 in oxidized low-density lipoprotein-pretreated C5a-induced cytokine expression, as measured by enzyme-linked immunosorbent assay. Finally, C5l2- and C5ar-deficient peripheral blood mononuclear cells showed less arrest on tumor necrosis factor-α-stimulated mouse endothelial cells in vitro when compared with wild-type controls. Taken together, prominent C5L2 expression in advanced atherosclerotic stages directly correlates with high levels of proinflammatory cytokines. This might indicate a proinflammatory role of C5L2 in atherosclerosis that needs to be pursued in the future by applying in vivo mouse models.
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Affiliation(s)
- Santosh Vijayan
- Institute for Molecular Cardiovascular Research, University Hospital, Aachen, Germany; Institute for Pharmacology and Clinical Pharmacology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Yaw Asare
- Institute for Molecular Cardiovascular Research, University Hospital, Aachen, Germany; Institute of Biochemistry and Molecular Cell Biology, University Hospital, Aachen, Germany
| | - Jochen Grommes
- European Vascular Centre Aachen-Maastricht, University Hospital, Aachen, Germany
| | - Oliver Soehnlein
- Institute for Molecular Cardiovascular Research, University Hospital, Aachen, Germany; Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Esther Lutgens
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Munich, Germany; Department of Medical Biochemistry, Amsterdam Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Gansuvd Shagdarsuren
- Department of Nephrology, Health Sciences University of Mongolia, Ulaanbaatar, Mongolia
| | - Ariunaa Togtokh
- Department of Nephrology, Health Sciences University of Mongolia, Ulaanbaatar, Mongolia
| | - Michael J Jacobs
- European Vascular Centre Aachen-Maastricht, University Hospital, Aachen, Germany; European Vascular Center Aachen-Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Jens W Fischer
- Institute for Pharmacology and Clinical Pharmacology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Jürgen Bernhagen
- Institute of Biochemistry and Molecular Cell Biology, University Hospital, Aachen, Germany; August-Lenz-Stiftung at Ludwig-Maximilians-University Hospital Munich, Munich, Germany
| | - Christian Weber
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Munich, Germany; Department of Medical Biochemistry, Amsterdam Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Andreas Schober
- Institute for Molecular Cardiovascular Research, University Hospital, Aachen, Germany; Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Munich, Germany
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C5L2 is required for C5a-triggered receptor internalization and ERK signaling. Cell Signal 2014; 26:1409-19. [PMID: 24631530 DOI: 10.1016/j.cellsig.2014.02.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 02/24/2014] [Indexed: 12/26/2022]
Abstract
C5L2 is a receptor that binds to C5a and belongs to the family of G protein-coupled receptors, but its role in physiological C5a-mediated responses remains under debate. Here we show that, like the canonical C5a receptor C5aR, C5L2 plays a pro-inflammatory role in a murine model of acute experimental colitis. We demonstrate that C5L2 physically interacts with C5aR and is required for optimal C5a-mediated C5aR internalization and associated ERK activation. Abrogation of C5a-induced receptor internalization by treatment with the dynamin inhibitor dynasore(TM) impaired C5a-induced MEK and ERK signaling. Although the presence of C5aR alone was sufficient to recruit the scaffold protein β-arrestin1 to the cell membrane in response to C5a stimulation, it was inadequate to mediate AP2 recruitment and subsequent C5aR internalization. Expression of C5L2 allowed normal internalization of C5aR in response to C5a stimulation, followed by normal ERK signaling. Thus, our work reveals an essential role for C5L2 in C5a-triggered, AP2-dependent C5aR internalization and downstream ERK signaling.
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Leach HG, Chrobak I, Han R, Trojanowska M. Endothelial cells recruit macrophages and contribute to a fibrotic milieu in bleomycin lung injury. Am J Respir Cell Mol Biol 2014; 49:1093-101. [PMID: 23885794 DOI: 10.1165/rcmb.2013-0152oc] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Systemic sclerosis (SSc) is a systemic autoimmune disease that causes inflammation, vasculopathy, and fibrosis of the skin and internal organs. One of the most severe complications of SSc involves the development of pulmonary fibrosis. Endothelial cell injury precedes the development of fibrosis, and is believed to be an initiating event. Therefore, we aimed to characterize the role of endothelial cells in the progression of pulmonary fibrosis, using a well-established bleomycin (BLM) model of pulmonary fibrosis. Endothelial cells were isolated by cell sorting, and the analysis of gene expression was performed with quantitative RT-PCR. Endothelial injury was induced between the first and second week, as shown by the elevated expression of the vascular injury markers matrix metallopeptidase-12 and von Willebrand factor. After injury, endothelial activation was indicated by the up-regulation of selectins, CCL chemokines, and inflammatory mediators, including complement anaphylatoxin receptors (C3aR and C5aR), oncostatin M, and leukemia inhibitory factor. The endothelial cell overexpression of fibrotic mediators, including connective tissue growth factor, plasminogen activator inhibitor-1, osteopontin, fibronectin, and fibroblast specific protein-1, was observed in the second and fourth weeks. This study suggests that endothelial cells actively contribute to the disease process via multiple mechanisms, including the recruitment of inflammatory cells and the establishment of a profibrotic environment during the development of BLM-induced pulmonary fibrosis.
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Stock AD, Wen J, Putterman C. Neuropsychiatric Lupus, the Blood Brain Barrier, and the TWEAK/Fn14 Pathway. Front Immunol 2013; 4:484. [PMID: 24400009 PMCID: PMC3872310 DOI: 10.3389/fimmu.2013.00484] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 12/10/2013] [Indexed: 11/13/2022] Open
Abstract
Patients with systemic lupus erythematosus (SLE) can experience acute neurological events such as seizures, cerebrovascular accidents, and delirium, psychiatric conditions including depression, anxiety, and psychosis, as well as memory loss and general cognitive decline. Neuropsychiatric SLE (NPSLE) occurs in between 30 and 40% of SLE patients, can constitute the initial patient presentation, and may occur outside the greater context of an SLE flare. Current efforts to elucidate the mechanistic underpinnings of NPSLE are focused on several different and potentially complementary pathways, including thrombosis, brain autoreactive antibodies, and complement deposition. Furthermore, significant effort is dedicated to understanding the contribution of neuroinflammation induced by TNF, IL-1, IL-6, and IFN-γ. More recent studies have pointed to a possible role for the TNF family ligand TWEAK in the pathogenesis of neuropsychiatric disease in human lupus patients, and in a murine model of this disease. The blood brain barrier (BBB) consists of tight junctions between endothelial cells (ECs) and astrocytic projections which regulate paracellular and transcellular flow into the central nervous system (CNS), respectively. Given the privileged environment of the CNS, an important question is whether and how the integrity of the BBB is compromised in NPSLE, and its potential pathogenic role. Evidence of BBB violation in NPSLE includes changes in the albumin quotient (Qalb) between plasma and cerebrospinal fluid, activation of brain ECs, and magnetic resonance imaging. This review summarizes the evidence implicating BBB damage as an important component in NPSLE development, occurring via damage to barrier integrity by environmental triggers such as infection and stress; cerebrovascular ischemia as result of a generally prothrombotic state; and immune mediated EC activation, mediated by antibodies and/or inflammatory cytokines. Additionally, new evidence supporting the role of TWEAK/Fn14 signaling in compromising the integrity of the BBB in lupus will be presented.
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Affiliation(s)
- Ariel D Stock
- Department of Microbiology and Immunology, Albert Einstein College of Medicine , Bronx, NY , USA
| | - Jing Wen
- Department of Microbiology and Immunology, Albert Einstein College of Medicine , Bronx, NY , USA
| | - Chaim Putterman
- Department of Microbiology and Immunology, Albert Einstein College of Medicine , Bronx, NY , USA ; Division of Rheumatology, Albert Einstein College of Medicine , Bronx, NY , USA
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