1
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Schlüter J, Cunningham S, Zimmermann R, Achenbach S, Kramer R, Erdmann M, Beckmann M, Heinzerling L, Hackstein H. Characterization of the impact of immune checkpoint inhibitors on platelet activation and aggregation. Immunobiology 2023; 228:152311. [PMID: 36495598 DOI: 10.1016/j.imbio.2022.152311] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/18/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022]
Abstract
Immune checkpoint inhibitors (ICIs) are effective oncological drugs which block cellular check-point receptors typically targeted by tumor immune evasion strategies. Despite their benefits, clinicians have reported treatment-associated thromboembolism during ICI therapy in recent years. Though several theories on this ICI-associated pathogenesis exist, the direct effects of ICIs on platelets remains unknown. We therefore investigated the potential direct and indirect effect of PD-1, PD-L1 and CTLA-4-targeting ICIs on platelet functionality in multifaceted in vitro experiments. Interestingly, we could not observe a clear effect of ICI on platelet aggregation and primary hemostasis in whole blood and platelet concentrate-based assays. Furthermore, the presence of ICIs in toll-like receptor stimulation had no significant impact on platelet surface marker expression. In a second approach, we investigated the indirect immunological impact of ICIs on platelet activation by exposing platelets to supernatants from ICI- and Staphylococcal enterotoxin B-exposed PBMCs. Whereas ICIs affected IL-2 levels in supernatants, we could not detect clear differences in the secretion of pro-thrombogenic factors and platelet responses. The obtained data suggest that the direct influence of ICIs on platelet activation or the influence of altered T cell function on platelet activation cannot be considered a major factor in the development of thrombotic events.
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Affiliation(s)
- Julian Schlüter
- Department of Transfusion Medicine and Hemostaseology, University Hospital Erlangen, Erlangen 91054, Germany
| | - Sarah Cunningham
- Department of Transfusion Medicine and Hemostaseology, University Hospital Erlangen, Erlangen 91054, Germany.
| | - Robert Zimmermann
- Department of Transfusion Medicine and Hemostaseology, University Hospital Erlangen, Erlangen 91054, Germany
| | - Susanne Achenbach
- Department of Transfusion Medicine and Hemostaseology, University Hospital Erlangen, Erlangen 91054, Germany
| | - Rafaela Kramer
- Department of Gynecology and Obstetrics, University Hospital Erlangen, Erlangen 91054, Germany
| | - Michael Erdmann
- Department of Gynecology and Obstetrics, University Hospital Erlangen, Erlangen 91054, Germany
| | - Malte Beckmann
- Department of Gynecology and Obstetrics, University Hospital Erlangen, Erlangen 91054, Germany
| | - Lucie Heinzerling
- Department of Gynecology and Obstetrics, University Hospital Erlangen, Erlangen 91054, Germany; Department of Dermatology and Allergology, Ludwig-Maximilian University, Munich 80539, Germany
| | - Holger Hackstein
- Department of Transfusion Medicine and Hemostaseology, University Hospital Erlangen, Erlangen 91054, Germany
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2
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Coagulopathy during COVID-19 infection: a brief review. Clin Exp Med 2022:10.1007/s10238-022-00891-4. [PMID: 36121504 PMCID: PMC9483403 DOI: 10.1007/s10238-022-00891-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 09/08/2022] [Indexed: 11/03/2022]
Abstract
The COVID-19 pandemic caused by SARS-CoV-2 continues to spread rapidly due to its virulence and ability to be transmitted by asymptomatic infected persons. If they are present, the symptoms of COVID-19 may include rhinorrhea (runny nose), headache, cough, and fever. Up to 5% of affected persons may experience more severe COVID-19 illness, including severe coagulopathy, acute respiratory distress syndrome (ARDS) characterized by respiratory failure that requires supplementary oxygen and mechanical ventilation, and multi-organ failure. Interestingly, clinical evidence has highlighted the distinction between COVID-19-associated coagulopathy (CAC) and disseminated intravascular coagulation (DIC). Patients with CAC exhibit different laboratory values than DIC patients for activated partial thromboplastin time (aPTT) and prothrombin time (PT) which may be normal or shortened, varying platelet counts, altered red blood cell morphology, unique bleeding complications, a lack of schistocytes in the peripheral blood, and no decrease in fibrinogen levels. In this review, we consider the search for 1) laboratory results that can diagnose or predict development of CAC, including serum levels of D-dimers, fibrinogen, interleukin-6 (IL-6) and the growth factor angiopoietin-2 (Ang-2), 2) mechanisms of CAC induction, and 3) novel therapeutic regimens that will successfully treat COVID-19 before development of CAC.
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3
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Petrelli A, Popp SK, Fukuda R, Parish CR, Bosi E, Simeonovic CJ. The Contribution of Neutrophils and NETs to the Development of Type 1 Diabetes. Front Immunol 2022; 13:930553. [PMID: 35874740 PMCID: PMC9299437 DOI: 10.3389/fimmu.2022.930553] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 06/13/2022] [Indexed: 12/14/2022] Open
Abstract
Type 1 diabetes (T1D) is an autoimmune disease resulting from the destruction of insulin-producing beta cells in pancreatic islets. T lymphocytes are the claimed pathogenic effectors but abnormalities of other immune cell types, including neutrophils, also characterize T1D development. During human T1D natural history, neutrophils are reduced in the circulation, while accumulate in the pancreas where release of neutrophil extracellular traps (NETs), or NETosis, is manifest. Recent-onset T1D patients also demonstrate activated circulating neutrophils, associated with a unique neutrophil gene signature. Neutrophils can bind to platelets, leading to the formation of platelet-neutrophil aggregates (PNAs). PNAs increase in the circulation during the development of human T1D and provide a mechanism for neutrophil activation and mobilization/recruitment to the pancreas. In non-obese diabetic or NOD mice, T1D autoimmunity is accompanied by dynamic changes in neutrophil numbers, activation state, PNAs and/or NETosis/NET proteins in the circulation, pancreas and/or islets. Such properties differ between stages of T1D disease and underpin potentially indirect and direct impacts of the innate immune system in T1D pathogenesis. Supporting the potential for a pathogenic role in T1D, NETs and extracellular histones can directly damage isolated islets in vitro, a toxicity that can be prevented by small polyanions. In human T1D, NET-related damage can target the whole pancreas, including both the endocrine and exocrine components, and contribute to beta cell destruction, providing evidence for a neutrophil-associated T1D endotype. Future intervention in T1D could therefore benefit from combined strategies targeting T cells and accessory destructive elements of activated neutrophils.
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Affiliation(s)
- Alessandra Petrelli
- San Raffaele Diabetes Research Institute, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy
| | - Sarah K Popp
- Immunology and Infectious Disease Division, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Riho Fukuda
- Immunology and Infectious Disease Division, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia.,Department of Medicine, Tokyo Medical and Dental University, Bunkyo City, Tokyo, Japan
| | - Christopher R Parish
- Genome Sciences and Cancer Division, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Emanuele Bosi
- San Raffaele Diabetes Research Institute, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Milan, Italy.,Department of Medicine, San Raffaele Vita Salute University, Milan, Italy
| | - Charmaine J Simeonovic
- Immunology and Infectious Disease Division, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
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4
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Ogweno G. Challenges in Platelet Functions in HIV/AIDS Management. Infect Dis (Lond) 2022. [DOI: 10.5772/intechopen.105731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
The interest in platelet functions in HIV/AIDS is due to the high incidence of microvascular thrombosis in these individuals. A lot of laboratory data have been generated regarding platelet functions in this population. The tests demonstrate platelet hyperactivity but decreased aggregation, though results are inconsistent depending on the study design. Antiretroviral treatments currently in use display complex interactions. Many studies on platelet functions in these patients have been for research purposes, but none have found utility in guiding drug treatment of thrombosis.
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5
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Palankar R, Sachs L, Wesche J, Greinacher A. Cytoskeleton Dependent Mobility Dynamics of FcγRIIA Facilitates Platelet Haptotaxis and Capture of Opsonized Bacteria. Cells 2022; 11:cells11101615. [PMID: 35626650 PMCID: PMC9139458 DOI: 10.3390/cells11101615] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/05/2022] [Accepted: 05/10/2022] [Indexed: 12/04/2022] Open
Abstract
Platelet adhesion and spreading at the sites of vascular injury is vital to hemostasis. As an integral part of the innate immune system, platelets interact with opsonized bacterial pathogens through FcγRIIA and contribute to host defense. As mechanoscavangers, platelets actively migrate and capture bacteria via cytoskeleton-rich, dynamic structures, such as filopodia and lamellipodia. However, the role of human platelet FcγRIIA in cytoskeleton-dependent interaction with opsonized bacteria is not well understood. To decipher this, we used a reductionist approach with well-defined micropatterns functionalized with immunoglobulins mimicking immune complexes at planar interfaces and bacteriamimetic microbeads. By specifically blocking of FcγRIIA and selective disruption of the platelet cytoskeleton, we show that both functional FcγRIIA and cytoskeleton are necessary for human platelet adhesion and haptotaxis. The direct link between FcγRIIA and the cytoskeleton is further explored by single-particle tracking. We then demonstrate the relevance of cytoskeleton-dependent differential mobilities of FcγRIIA on bacteria opsonized with the chemokine platelet factor 4 (PF4) and patient-derived anti-PF4/polyanion IgG. Our data suggest that efficient capture of opsonized bacteria during host-defense is governed by mobility dynamics of FcγRIIA on filopodia and lamellipodia, and the cytoskeleton plays an essential role in platelet morphodynamics at biological interfaces that display immune complexes.
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6
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Barale C, Melchionda E, Morotti A, Russo I. Prothrombotic Phenotype in COVID-19: Focus on Platelets. Int J Mol Sci 2021; 22:ijms222413638. [PMID: 34948438 PMCID: PMC8705811 DOI: 10.3390/ijms222413638] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/16/2021] [Accepted: 12/17/2021] [Indexed: 12/15/2022] Open
Abstract
COVID-19 infection is associated with a broad spectrum of presentations, but alveolar capillary microthrombi have been described as a common finding in COVID-19 patients, appearing as a consequence of a severe endothelial injury with endothelial cell membrane disruption. These observations clearly point to the identification of a COVID-19-associated coagulopathy, which may contribute to thrombosis, multi-organ damage, and cause of severity and fatality. One significant finding that emerges in prothrombotic abnormalities observed in COVID-19 patients is that the coagulation alterations are mainly mediated by the activation of platelets and intrinsically related to viral-mediated endothelial inflammation. Beyond the well-known role in hemostasis, the ability of platelets to also release various potent cytokines and chemokines has elevated these small cells from simple cell fragments to crucial modulators in the blood, including their inflammatory functions, that have a large influence on the immune response during infectious disease. Indeed, platelets are involved in the pathogenesis of acute lung injury also by promoting NET formation and affecting vascular permeability. Specifically, the deposition by activated platelets of the chemokine platelet factor 4 at sites of inflammation promotes adhesion of neutrophils on endothelial cells and thrombogenesis, and it seems deeply involved in the phenomenon of vaccine-induced thrombocytopenia and thrombosis. Importantly, the hyperactivated platelet phenotype along with evidence of cytokine storm, high levels of P-selectin, D-dimer, and, on the other hand, decreased levels of fibrinogen, von Willebrand factor, and thrombocytopenia may be considered suitable biomarkers that distinguish the late stage of COVID-19 progression in critically ill patients.
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Affiliation(s)
| | | | | | - Isabella Russo
- Correspondence: ; Tel.: +39-011-6705447; Fax: +39-011-9038639
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7
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Melki I, Allaeys I, Tessandier N, Mailhot B, Cloutier N, Campbell RA, Rowley JW, Salem D, Zufferey A, Laroche A, Lévesque T, Patey N, Rauch J, Lood C, Droit A, McKenzie SE, Machlus KR, Rondina MT, Lacroix S, Fortin PR, Boilard E. FcγRIIA expression accelerates nephritis and increases platelet activation in systemic lupus erythematosus. Blood 2020; 136:2933-2945. [PMID: 33331924 PMCID: PMC7751357 DOI: 10.1182/blood.2020004974] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 07/11/2020] [Indexed: 02/06/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune inflammatory disease characterized by deposits of immune complexes (ICs) in organs and tissues. The expression of FcγRIIA by human platelets, which is their unique receptor for immunoglobulin G antibodies, positions them to ideally respond to circulating ICs. Whereas chronic platelet activation and thrombosis are well-recognized features of human SLE, the exact mechanisms underlying platelet activation in SLE remain unknown. Here, we evaluated the involvement of FcγRIIA in the course of SLE and platelet activation. In patients with SLE, levels of ICs are associated with platelet activation. Because FcγRIIA is absent in mice, and murine platelets do not respond to ICs in any existing mouse model of SLE, we introduced the FcγRIIA (FCGR2A) transgene into the NZB/NZWF1 mouse model of SLE. In mice, FcγRIIA expression by bone marrow cells severely aggravated lupus nephritis and accelerated death. Lupus onset initiated major changes to the platelet transcriptome, both in FcγRIIA-expressing and nonexpressing mice, but enrichment for type I interferon response gene changes was specifically observed in the FcγRIIA mice. Moreover, circulating platelets were degranulated and were found to interact with neutrophils in FcγRIIA-expressing lupus mice. FcγRIIA expression in lupus mice also led to thrombosis in lungs and kidneys. The model recapitulates hallmarks of human SLE and can be used to identify contributions of different cellular lineages in the manifestations of SLE. The study further reveals a role for FcγRIIA in nephritis and in platelet activation in SLE.
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Affiliation(s)
- Imene Melki
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- Centre de Recherche Arthrite, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
| | - Isabelle Allaeys
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- Centre de Recherche Arthrite, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
| | - Nicolas Tessandier
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- Centre de Recherche Arthrite, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
| | - Benoit Mailhot
- Département de Médecine Moléculaire, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
- Axe Neurosciences, Université Laval, Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
| | - Nathalie Cloutier
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- Centre de Recherche Arthrite, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
| | - Robert A Campbell
- Department of Internal Medicine and Pathology, University of Utah, Salt Lake City, UT
- University of Utah Molecular Medicine Program, Eccles Institute of Human Genetics, Salt Lake City, UT
| | - Jesse W Rowley
- Department of Internal Medicine and Pathology, University of Utah, Salt Lake City, UT
- University of Utah Molecular Medicine Program, Eccles Institute of Human Genetics, Salt Lake City, UT
| | - David Salem
- Division of Rheumatology, Department of Medicine, McGill University, Montreal, QC, Canada
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Anne Zufferey
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- Centre de Recherche Arthrite, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
| | - Audrée Laroche
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- Centre de Recherche Arthrite, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
| | - Tania Lévesque
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- Centre de Recherche Arthrite, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
| | - Natalie Patey
- Centre Hospitalier Universitaire de Sainte-Justine, Département de Pathologie et Biologie Cellulaire, Faculté de Médecine, Université de Montreal, Montreal, QC, Canada
| | - Joyce Rauch
- Division of Rheumatology, Department of Medicine, McGill University, Montreal, QC, Canada
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Christian Lood
- Division of Rheumatology, Department of Medicine, University of Washington, Seattle, WA
| | - Arnaud Droit
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- Département de Médecine Moléculaire, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
| | - Steven E McKenzie
- Cardeza Foundation for Hematological Research, Thomas Jefferson University, Philadelphia, PA
| | - Kellie R Machlus
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and
| | - Matthew T Rondina
- Axe Neurosciences, Université Laval, Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- University of Utah Molecular Medicine Program, Eccles Institute of Human Genetics, Salt Lake City, UT
- Department of Internal Medicine-Geriatric Research Education and Clinical Center (GRECC), George E. Wahlen Veterans Affairs Medical Center (VAMC), Salt Lake City, UT
| | - Steve Lacroix
- Centre de Recherche Arthrite, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
- Département de Médecine Moléculaire, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
| | - Paul R Fortin
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- Centre de Recherche Arthrite, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
| | - Eric Boilard
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC, Canada
- Centre de Recherche Arthrite, Faculté de Médecine de l'Université Laval, Québec, QC, Canada
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8
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Biphasic Force-Regulated Phosphorylation Site Exposure and Unligation of ERM Bound with PSGL-1: A Novel Insight into PSGL-1 Signaling via Steered Molecular Dynamics Simulations. Int J Mol Sci 2020; 21:ijms21197064. [PMID: 32992803 PMCID: PMC7583015 DOI: 10.3390/ijms21197064] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 09/20/2020] [Accepted: 09/23/2020] [Indexed: 12/19/2022] Open
Abstract
The PSGL-1-actin cytoskeleton linker proteins ezrin/radixin/moesin (ERM), an adaptor between P-selectin glycoprotein ligand-1 (PSGL-1) and spleen tyrosine kinase (Syk), is a key player in PSGL-1 signal, which mediates the adhesion and recruitment of leukocytes to the activated endothelial cells in flow. Binding of PSGL-1 to ERM initials intracellular signaling through inducing phosphorylation of Syk, but effects of tensile force on unligation and phosphorylation site exposure of ERM bound with PSGL-1 remains unclear. To answer this question, we performed a series of so-called “ramp-clamp” steered molecular dynamics (SMD) simulations on the radixin protein FERM domain of ERM bound with intracellular juxtamembrane PSGL-1 peptide. The results showed that, the rupture force of complex pulled with constant velocity was over 250 pN, which prevented the complex from breaking in front of pull-induced exposure of phosphorylation site on immunoreceptor tyrosine activation motif (ITAM)-like motif of ERM; the stretched complex structure under constant tensile forces <100 pN maintained on a stable quasi-equilibrium state, showing a high mechano-stabilization of the clamped complex; and, in consistent with the force-induced allostery at clamped stage, increasing tensile force (<50 pN) would decrease the complex dissociation probability but facilitate the phosphorylation site exposure, suggesting a force-enhanced biophysical connectivity of PSGL-1 signaling. These force-enhanced characters in both phosphorylation and unligation of ERM bound with PSGL-1 should be mediated by a catch-slip bond transition mechanism, in which four residue interactions on binding site were involved. This study might provide a novel insight into the transmembrane PSGL-1 signal, its biophysical connectivity and molecular structural basis for cellular immune responses in mechano-microenvironment, and showed a rational SMD-based computer strategy for predicting structure-function relation of protein under loads.
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9
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Marcoux G, Laroche A, Espinoza Romero J, Boilard E. Role of platelets and megakaryocytes in adaptive immunity. Platelets 2020; 32:340-351. [PMID: 32597341 DOI: 10.1080/09537104.2020.1786043] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The immune system is comprised of two principal interconnected components called innate and adaptive immunity. While the innate immune system mounts a nonspecific response that provides protection against the spread of foreign pathogens, the adaptive immune system has developed to specifically recognize a given pathogen and lead to immunological memory. Platelets are small fragments produced from megakaryocytes in bone marrow and lungs. They circulate throughout the blood to monitor the integrity of the vasculature and to prevent bleeding. Given their large repertoire of immune receptors and inflammatory molecules, platelets and megakaryocytes can contribute to both innate and adaptive immunity. In adaptive immunity, platelets and megakaryocytes can process and present antigens to lymphocytes. Moreover, platelets, via FcγRIIA, rapidly respond to pathogens in an immune host when antibodies are present. This manuscript reviews the reported contributions of platelets and megakaryocytes with emphasis on antigen presentation and antibody response in adaptive immunity.
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Affiliation(s)
- Genevieve Marcoux
- Axe Maladies Infectieuses et Inflammatoires, Centre de Recherche du CHU de Québec, Université Laval, Québec, QC, Canada.,Département de Microbiologie-infectiologie et D'immunologie and Centre ARThrite, Université Laval, Québec, QC, Canada.,Department of Infectious Diseases and Immunity, Centre de Recherche du CHU de Québec, Québec, QC, Canada
| | - Audrée Laroche
- Axe Maladies Infectieuses et Inflammatoires, Centre de Recherche du CHU de Québec, Université Laval, Québec, QC, Canada.,Département de Microbiologie-infectiologie et D'immunologie and Centre ARThrite, Université Laval, Québec, QC, Canada.,Department of Infectious Diseases and Immunity, Centre de Recherche du CHU de Québec, Québec, QC, Canada
| | - Jenifer Espinoza Romero
- Axe Maladies Infectieuses et Inflammatoires, Centre de Recherche du CHU de Québec, Université Laval, Québec, QC, Canada.,Département de Microbiologie-infectiologie et D'immunologie and Centre ARThrite, Université Laval, Québec, QC, Canada.,Department of Infectious Diseases and Immunity, Centre de Recherche du CHU de Québec, Québec, QC, Canada
| | - Eric Boilard
- Axe Maladies Infectieuses et Inflammatoires, Centre de Recherche du CHU de Québec, Université Laval, Québec, QC, Canada.,Département de Microbiologie-infectiologie et D'immunologie and Centre ARThrite, Université Laval, Québec, QC, Canada.,Department of Infectious Diseases and Immunity, Centre de Recherche du CHU de Québec, Québec, QC, Canada
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10
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Tessandier N, Melki I, Cloutier N, Allaeys I, Miszta A, Tan S, Milasan A, Michel S, Benmoussa A, Lévesque T, Côté F, McKenzie SE, Gilbert C, Provost P, Brisson AR, Wolberg AS, Fortin PR, Martel C, Boilard É. Platelets Disseminate Extracellular Vesicles in Lymph in Rheumatoid Arthritis. Arterioscler Thromb Vasc Biol 2020; 40:929-942. [PMID: 32102567 PMCID: PMC8073225 DOI: 10.1161/atvbaha.119.313698] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The lymphatic system is a circulatory system that unidirectionally drains the interstitial tissue fluid back to blood circulation. Although lymph is utilized by leukocytes for immune surveillance, it remains inaccessible to platelets and erythrocytes. Activated cells release submicron extracellular vesicles (EV) that transport molecules from the donor cell. In rheumatoid arthritis, EV accumulate in the joint where they can interact with numerous cellular lineages. However, whether EV can exit the inflamed tissue to recirculate is unknown. Here, we investigated whether vascular leakage that occurs during inflammation could favor EV access to the lymphatic system. Approach and Results: Using an in vivo model of autoimmune inflammatory arthritis, we show that there is an influx of platelet EV, but not EV from erythrocytes or leukocytes, in joint-draining lymph. In contrast to blood platelet EV, lymph platelet EV lacked mitochondrial organelles and failed to promote coagulation. Platelet EV influx in lymph was consistent with joint vascular leakage and implicated the fibrinogen receptor α2bβ3 and platelet-derived serotonin. CONCLUSIONS These findings show that platelets can disseminate their EV in fluid that is inaccessible to platelets and beyond the joint in this disease.
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Affiliation(s)
- Nicolas Tessandier
- From the Centre de recherche du CHU de Québec, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Département de microbiologie-infectiologie et d'immunologie, Université Laval, QC, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
| | - Imene Melki
- From the Centre de recherche du CHU de Québec, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Département de microbiologie-infectiologie et d'immunologie, Université Laval, QC, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
| | - Nathalie Cloutier
- From the Centre de recherche du CHU de Québec, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Département de microbiologie-infectiologie et d'immunologie, Université Laval, QC, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
| | - Isabelle Allaeys
- From the Centre de recherche du CHU de Québec, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Département de microbiologie-infectiologie et d'immunologie, Université Laval, QC, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
| | - Adam Miszta
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill (A.M., A.S.W.)
- Montreal Heart Institute, Quebec, Canada (A.M., C.M.)
| | - Sisareuth Tan
- Extracellular Vesicles and Membrane Repair, UMR-5248-CBMN CNRS-University of Bordeaux-IPB, Allée Geoffroy Saint-Hilaire, Pessac, France (S.T., A.R.B.)
| | - Andreea Milasan
- Department of Medicine, Faculty of Medicine (A.M., C.M.), Université de Montréal, Quebec, Canada
| | - Sara Michel
- From the Centre de recherche du CHU de Québec, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Département de microbiologie-infectiologie et d'immunologie, Université Laval, QC, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
| | - Abderrahim Benmoussa
- Department of Nutrition, CHU Sainte-Justine (A.B.), Université de Montréal, Quebec, Canada
| | - Tania Lévesque
- From the Centre de recherche du CHU de Québec, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Département de microbiologie-infectiologie et d'immunologie, Université Laval, QC, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
| | - Francine Côté
- Institut Imagine, Inserm U1163, Laboratoire Olivier Hermine, Paris, France (F.C.)
| | - Steven E McKenzie
- Cardeza Foundation for Hematological Research, Thomas Jefferson University, Philadelphia, PA (S.E.M.)
| | - Caroline Gilbert
- From the Centre de recherche du CHU de Québec, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Département de microbiologie-infectiologie et d'immunologie, Université Laval, QC, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
| | - Patrick Provost
- From the Centre de recherche du CHU de Québec, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Département de microbiologie-infectiologie et d'immunologie, Université Laval, QC, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
| | - Alain R Brisson
- Extracellular Vesicles and Membrane Repair, UMR-5248-CBMN CNRS-University of Bordeaux-IPB, Allée Geoffroy Saint-Hilaire, Pessac, France (S.T., A.R.B.)
| | - Alisa S Wolberg
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill (A.M., A.S.W.)
| | - Paul R Fortin
- From the Centre de recherche du CHU de Québec, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Département de microbiologie-infectiologie et d'immunologie, Université Laval, QC, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Axe maladies infectieuses et inflammatoires, Centre de recherche du CHU de Québec-Université Laval, Québec, Canada (P.R.F., E.B.)
| | - Catherine Martel
- Department of Medicine, Faculty of Medicine (A.M., C.M.), Université de Montréal, Quebec, Canada
- Montreal Heart Institute, Quebec, Canada (A.M., C.M.)
| | - Éric Boilard
- From the Centre de recherche du CHU de Québec, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Département de microbiologie-infectiologie et d'immunologie, Université Laval, QC, Canada (N.T., I.M., N.C., I.A., S.M., T.L., C.G., P.P., P.R.F., E.B.)
- Axe maladies infectieuses et inflammatoires, Centre de recherche du CHU de Québec-Université Laval, Québec, Canada (P.R.F., E.B.)
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11
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Andrianova IA, Ponomareva AA, Mordakhanova ER, Le Minh G, Daminova AG, Nevzorova TA, Rauova L, Litvinov RI, Weisel JW. In systemic lupus erythematosus anti-dsDNA antibodies can promote thrombosis through direct platelet activation. J Autoimmun 2020; 107:102355. [PMID: 31732191 PMCID: PMC10875727 DOI: 10.1016/j.jaut.2019.102355] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 10/28/2019] [Accepted: 10/30/2019] [Indexed: 12/20/2022]
Abstract
Systemic lupus erythematosus (SLE) is associated with a high risk of venous and arterial thrombosis, not necessarily associated with prothrombotic antiphospholipid antibodies (Abs). Alternatively, thrombosis may be due to an increased titer of anti-dsDNA Abs that presumably promote thrombosis via direct platelet activation. Here, we investigated effects of purified anti-dsDNA Abs from the blood of SLE patients, alone or in a complex with dsDNA, on isolated normal human platelets. We showed that anti-dsDNA Abs and anti-dsDNA Ab/dsDNA complexes induced strong platelet activation assessed by enhanced P-selectin expression and dramatic morphological and ultrastructural changes. Electron microscopy revealed a significantly higher percentage of platelets that lost their discoid shape, formed multiple filopodia and had a shrunken body when treated with anti-dsDNA Abs or anti-dsDNA Ab/dsDNA complexes compared with control samples. In addition, these platelets activated with anti-dsDNA Ab/dsDNA complexes typically contained a reduced number of secretory α-granules that grouped in the middle and often merged into a solid electron dense area. Many activated platelets released plasma membrane-derived microvesicles and/or fell apart into subcellular cytoplasmic fragments. Confocal microscopy revealed that platelets treated with anti-dsDNA Ab/dsDNA complex had a heterogeneous distribution of septin2 compared with the homogeneous distribution in control platelets. Structural perturbations were concomitant with mitochondrial depolarization and a decreased content of platelet ATP, indicating energetic exhaustion. Most of the biochemical and morphological changes in platelets induced by anti-dsDNA Abs and anti-dsDNA Ab/dsDNA complexes were prevented by pre-treatment with a monoclonal mAb against FcγRIIA. The aggregate of data indicates that anti-dsDNA Abs alone or in a complex with dsDNA strongly affect platelets via the FcγRIIA receptor. The immune activation of platelets with antinuclear Abs may comprise a prothrombotic mechanism underlying a high risk of thrombotic complications in patients with SLE.
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Affiliation(s)
- Izabella A Andrianova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russian Federation.
| | - Anastasiya A Ponomareva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russian Federation; Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Center of the Russian Academy of Sciences, Kazan, Russian Federation.
| | - Elmira R Mordakhanova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russian Federation.
| | - Giang Le Minh
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russian Federation.
| | - Amina G Daminova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russian Federation; Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Center of the Russian Academy of Sciences, Kazan, Russian Federation.
| | - Tatiana A Nevzorova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russian Federation.
| | - Lubica Rauova
- The Children's Hospital of Philadelphia, Philadelphia, PA, USA; University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
| | - Rustem I Litvinov
- University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
| | - John W Weisel
- University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
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12
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Bui VC, Gebicka P, Hippe H, Raschke R, Nguyen TL, Greinacher A, Nguyen TH. Physicochemical Characteristics of Platelet Factor 4 under Various Conditions are Relevant for Heparin-Induced Thrombocytopenia Testing. J Phys Chem B 2020; 124:1438-1443. [DOI: 10.1021/acs.jpcb.9b11695] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Van-Chien Bui
- Institute for Immunology and Transfusion Medicine, University Medicine of Greifswald, 17475 Greifswald, Mecklenburg-Vorpommern, Germany
| | - Patrycja Gebicka
- Institute for Immunology and Transfusion Medicine, University Medicine of Greifswald, 17475 Greifswald, Mecklenburg-Vorpommern, Germany
- Chromatec, 17489 Greifswald, Mecklenburg-Vorpommern, Germany
| | - Holger Hippe
- Chromatec, 17489 Greifswald, Mecklenburg-Vorpommern, Germany
| | - Ricarda Raschke
- Institute for Immunology and Transfusion Medicine, University Medicine of Greifswald, 17475 Greifswald, Mecklenburg-Vorpommern, Germany
| | - Thuy-Linh Nguyen
- Institute for Immunology and Transfusion Medicine, University Medicine of Greifswald, 17475 Greifswald, Mecklenburg-Vorpommern, Germany
| | - Andreas Greinacher
- Institute for Immunology and Transfusion Medicine, University Medicine of Greifswald, 17475 Greifswald, Mecklenburg-Vorpommern, Germany
| | - Thi-Huong Nguyen
- Institute for Immunology and Transfusion Medicine, University Medicine of Greifswald, 17475 Greifswald, Mecklenburg-Vorpommern, Germany
- Institute for Bioprocessing and Analytical Measurement Techniques, Rosenhof D, 37308 Heilbad Heiligenstadt, Thuringia, Germany
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13
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Abstract
Dysregulation of lymphocyte function, accumulation of autoantibodies and defective clearance of circulating immune complexes and apoptotic cells are hallmarks of systemic lupus erythematosus (SLE). Moreover, it is now evident that an intricate interplay between the adaptive and innate immune systems contributes to the pathogenesis of SLE, ultimately resulting in chronic inflammation and organ damage. Platelets circulate in the blood and are chiefly recognized for their role in the prevention of bleeding and promotion of haemostasis; however, accumulating evidence points to a role for platelets in both adaptive and innate immunity. Through a broad repertoire of receptors, platelets respond promptly to immune complexes, complement and damage-associated molecular patterns, and represent a major reservoir of immunomodulatory molecules in the circulation. Furthermore, evidence suggests that platelets are activated in patients with SLE, and that they could contribute to the circulatory autoantigenic load through the release of microparticles and mitochondrial antigens. Herein, we highlight how platelets contribute to the immune response and review evidence implicating platelets in the pathogenesis of SLE.
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14
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Kuriri FA, O'Malley CJ, Jackson DE. Molecular mechanisms of immunoreceptors in platelets. Thromb Res 2019; 176:108-114. [DOI: 10.1016/j.thromres.2019.01.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/20/2019] [Accepted: 01/28/2019] [Indexed: 01/05/2023]
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15
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The genomic organization and expression pattern of the low-affinity Fc gamma receptors (FcγR) in the Göttingen minipig. Immunogenetics 2018; 71:123-136. [PMID: 30564855 PMCID: PMC6327001 DOI: 10.1007/s00251-018-01099-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 11/24/2018] [Indexed: 12/21/2022]
Abstract
Safety and efficacy of therapeutic antibodies are often dependent on their interaction with Fc receptors for IgG (FcγRs). The Göttingen minipig represents a valuable species for biomedical research but its use in preclinical studies with therapeutic antibodies is hampered by the lack of knowledge about the porcine FcγRs. Genome analysis and sequencing now enabled the localization of the previously described FcγRIIIa in the orthologous location to human FCGR3A. In addition, we identified nearby the gene coding for the hitherto undescribed putative porcine FcγRIIa. The 1′241 bp long FCGR2A cDNA translates to a 274aa transmembrane protein containing an extracellular region with high similarity to human and cattle FcγRIIa. Like in cattle, the intracellular part does not contain an immunoreceptor tyrosine-based activation motif (ITAM) as in human FcγRIIa. Flow cytometry of the whole blood and single-cell RNA sequencing of peripheral blood mononuclear cells (PBMCs) of Göttingen minipigs revealed the expression profile of all porcine FcγRs which is compared to human and mouse. The new FcγRIIa is mainly expressed on platelets making the minipig a good model to study IgG-mediated platelet activation and aggregation. In contrast to humans, minipig blood monocytes were found to express inhibitory FcγRIIb that could lead to the underestimation of FcγR-mediated effects of monocytes observed in minipig studies with therapeutic antibodies.
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16
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Palankar R, Kohler TP, Krauel K, Wesche J, Hammerschmidt S, Greinacher A. Platelets kill bacteria by bridging innate and adaptive immunity via platelet factor 4 and FcγRIIA. J Thromb Haemost 2018; 16:1187-1197. [PMID: 29350833 DOI: 10.1111/jth.13955] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Indexed: 12/15/2022]
Abstract
Essentials Human platelets specifically interact with IgG opsonized bacteria through FcγRIIA. Platelet factor 4 (PF4) binds to polyanions (P) and undergoes a conformational change. Anti-PF4/P IgG opsonizes PF4-coated Gram-positive and Gram-negative bacteria. Platelets specifically kill E.coli opsonized with PF4 and human anti-PF4/P IgG. SUMMARY Background Activated platelets release the chemokine platelet factor 4 (PF4) stored in their granules. PF4 binds to polyanions (P) on bacteria, undergoes a conformational change and exposes neoepitopes. These neoepitopes induce production of anti-PF4/P antibodies. As PF4 binds to a variety of bacteria, anti-PF4/P IgG can bind and opsonize several bacterial species. Objective Here we investigated whether platelets are able to kill bacteria directly after recognizing anti-PF4/P IgG opsonized bacteria in the presence of PF4 via their FcγRIIA. Methods Using platelet-bacteria suspension co-culture experiments and micropatterns with immobilized viable bacteria, in combination with pharmacological inhibitors and human anti- PF4/P IgG we analyzed the role of platelet-mediated killing of bacteria. Results In the presence of PF4, human anti-PF4/P IgG and platelets, E. coli killing (> 50%) with colony forming units (CFU mL-1 ) 0.71 × 104 ± 0.19 was observed compared with controls incubated only with anti-PF4/P IgG (CFU mL-1 3.4 × 104 ± 0.38). Blocking of platelet FcγRIIA using mAb IV.3 (CFU mL-1 2.5 × 104 ± 0.45), or integrin αIIbβ3 (CFU mL-1 2.26 × 104 ± 0.31), or disruption of cytoskeletal functions (CFU mL-1 2.7 × 104 ± 0.4) markedly reduced E. coli killing by this mechanism. Our observation of E. coli killing by platelets on micropatterned arrays is compatible with the model that platelets kill bacteria by covering them, actively concentrating them into the area under their granulomere and then releasing antimicrobial substances of platelet α-granules site directed towards bacteria. Conclusion These findings collectively indicate that by bridging of innate and adaptive immune mechanisms, platelets and anti-PF4/polyanion antibodies cooperate in an antibacterial host response.
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Affiliation(s)
- R Palankar
- Institute for Immunology and Transfusion Medicine, University Medicine Greifswald, Greifswald, Germany
| | - T P Kohler
- Department of Molecular Genetics and Infection Biology, Interfaculty Institute for Genetics and Functional Genomics, University of Greifswald, Greifswald, Germany
| | - K Krauel
- Institute for Immunology and Transfusion Medicine, University Medicine Greifswald, Greifswald, Germany
| | - J Wesche
- Institute for Immunology and Transfusion Medicine, University Medicine Greifswald, Greifswald, Germany
| | - S Hammerschmidt
- Department of Molecular Genetics and Infection Biology, Interfaculty Institute for Genetics and Functional Genomics, University of Greifswald, Greifswald, Germany
| | - A Greinacher
- Institute for Immunology and Transfusion Medicine, University Medicine Greifswald, Greifswald, Germany
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17
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Scherlinger M, Sisirak V, Richez C, Lazaro E, Duffau P, Blanco P. New Insights on Platelets and Platelet-Derived Microparticles in Systemic Lupus Erythematosus. Curr Rheumatol Rep 2018; 19:48. [PMID: 28718063 DOI: 10.1007/s11926-017-0678-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
PURPOSE OF REVIEW Current knowledge on the role of platelets and platelet-derived microparticles (PMPs) on the immune system has been fast-growing. Systemic lupus erythematosus (SLE) is a systemic auto-immune disorder characterized by a loss of tolerance toward nuclear auto-antigens. Although recent studies allowed a better understanding of SLE pathogenesis, there is an urgent need for the development of new treatments and the identification of new biomarkers to assess the disease activity. We describe here the state-of-the-art knowledge linking platelets and PMPs to SLE. RECENT FINDINGS Platelet system activation is a key event in the pathogenesis of SLE. Circulating immune complexes, anti-phospholipid antibodies, and infectious agents such as virus are the main activators of platelets in SLE. Platelet activation can be monitored through different ways such as P-selectin expression, mean platelet volume, or circulating PMP levels, suggesting their potential use as biomarkers. Upon activation, platelets promote type I interferon production, NETosis, dendritic cell activation, and T and B lymphocyte activation, all essential events contributing to the development of SLE. Of interest, platelets also play a fundamental role in SLE organ disease such as the development of cardiovascular, thrombotic, and renal diseases. Finally, we review current knowledge on drugs targeting platelet activation and their potential impact on SLE pathogenesis. Platelets play a major role in SLE pathogenesis and organ disease and represent a great potential for novel biomarkers and drug development.
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Affiliation(s)
- Marc Scherlinger
- Service de Rhumatologie, FHU ACRONIM, Hôpital Pellegrin, Centre Hospitalier Universitaire, place Amélie Raba Léon, 33076, Bordeaux, France.,Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France.,CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France
| | - Vanja Sisirak
- Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France.,CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France
| | - Christophe Richez
- Service de Rhumatologie, FHU ACRONIM, Hôpital Pellegrin, Centre Hospitalier Universitaire, place Amélie Raba Léon, 33076, Bordeaux, France.,Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France.,CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France
| | - Estibaliz Lazaro
- Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France.,CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France.,Laboratoire d'Immunologie et Immunogénétique, FHU ACRONIM, Hôpital Pellegrin, Centre Hospitalier Universitaire, place Amélie Raba Léon, 33076, Bordeaux, France
| | - Pierre Duffau
- Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France.,CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France.,Service de médecine interne, FHU ACRONIM, Hôpital Saint André, Centre Hospitalier Universitaire, 1 rue Jean Burguet, 33076, Bordeaux, France
| | - Patrick Blanco
- Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France. .,CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076, Bordeaux, France. .,Laboratoire d'Immunologie et Immunogénétique, FHU ACRONIM, Hôpital Pellegrin, Centre Hospitalier Universitaire, place Amélie Raba Léon, 33076, Bordeaux, France.
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18
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Scherlinger M, Guillotin V, Truchetet ME, Contin-Bordes C, Sisirak V, Duffau P, Lazaro E, Richez C, Blanco P. Systemic lupus erythematosus and systemic sclerosis: All roads lead to platelets. Autoimmun Rev 2018; 17:625-635. [PMID: 29635077 DOI: 10.1016/j.autrev.2018.01.012] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 01/18/2018] [Indexed: 01/13/2023]
Abstract
Systemic lupus erythematosus (SLE) and systemic sclerosis (SSc) are two phenotypically distincts inflammatory systemic diseases. However, SLE and SSc share pathogenic features such as interferon signature, loss of tolerance against self-nuclear antigens and increased tissue damage such as fibrosis. Recently, platelets have emerged as a major actor in immunity including auto-immune diseases. Both SLE and SSc are characterized by strong platelet system activation, which is likely to be both the witness and culprit in their pathogenesis. Platelet activation pathways are multiple and sometimes redundant. They include immune complexes, Toll-like receptors activation, antiphospholipid antibodies and ischemia-reperfusion associated with Raynaud phenomenon. Once activated, platelet promote immune dysregulation by priming interferon production by immune cells, providing CD40L supporting B lymphocyte functions and providing a source of autoantigens. Platelets are actively implicated in SLE and SSc end-organ damage such as cardiovascular and renal disease and in the promotion of tissue fibrosis. Finally, after understanding the main pathogenic implications of platelet activation in both diseases, we discuss potential therapeutics targeting platelets.
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Affiliation(s)
- Marc Scherlinger
- Service de Rhumatologie, FHU ACRONIM, Hôpital Pellegrin, Centre Hospitalier Universitaire, Place Amélie Raba Léon, 33076 Bordeaux, France; Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France; CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Vivien Guillotin
- Service de médecine interne, FHU ACRONIM, Hôpital Saint André, Centre Hospitalier Universitaire, 1 rue Jean Burguet, 33076 Bordeaux, France; Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France; CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Marie-Elise Truchetet
- Service de Rhumatologie, FHU ACRONIM, Hôpital Pellegrin, Centre Hospitalier Universitaire, Place Amélie Raba Léon, 33076 Bordeaux, France; Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France; CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Cécile Contin-Bordes
- Laboratoire d'Immunologie et Immunogénétique, FHU ACRONIM, Hôpital Pellegrin, Centre Hospitalier Universitaire, Place Amélie Raba Léon, 33076 Bordeaux, France; Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France; CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Vanja Sisirak
- Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France; CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Pierre Duffau
- Service de médecine interne, FHU ACRONIM, Hôpital Saint André, Centre Hospitalier Universitaire, 1 rue Jean Burguet, 33076 Bordeaux, France; Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France; CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Estibaliz Lazaro
- Laboratoire d'Immunologie et Immunogénétique, FHU ACRONIM, Hôpital Pellegrin, Centre Hospitalier Universitaire, Place Amélie Raba Léon, 33076 Bordeaux, France; Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France; CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Christophe Richez
- Service de Rhumatologie, FHU ACRONIM, Hôpital Pellegrin, Centre Hospitalier Universitaire, Place Amélie Raba Léon, 33076 Bordeaux, France; Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France; CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Patrick Blanco
- Laboratoire d'Immunologie et Immunogénétique, FHU ACRONIM, Hôpital Pellegrin, Centre Hospitalier Universitaire, Place Amélie Raba Léon, 33076 Bordeaux, France; Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France; CNRS-UMR 5164, ImmunoConcept, Université de Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France.
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Abstract
PURPOSE OF REVIEW The purpose of this review is to summarize recent findings on heparin-induced thrombocytopenia (HIT), a prothrombotic disorder caused by platelet-activating IgG targeting platelet factor 4 (PF4)/polyanion complexes. RECENT FINDINGS HIT can explain unusual clinical events, including adrenal hemorrhages, arterial/intracardiac thrombosis, skin necrosis, anaphylactoid reactions, and disseminated intravascular coagulation. Sometimes, HIT begins/worsens after stopping heparin ('delayed-onset' HIT). Various HIT-mimicking disorders are recognized (e.g., acute disseminated intravascular coagulation/'shock liver' with limb ischemia). HIT has features of both B-cell and T-cell immune responses; uptake of PF4/heparin complexes into macrophages ('macropinocytosis') facilitates the anti-PF4/heparin immune response. Antibody-induced activation of monocytes and platelets via their FcγIIA receptors triggers an intense procoagulant response. Sometimes, HIT antibodies recognize PF4 bound to (platelet-associated) chondroitin sulfate, explaining how HIT might occur without concurrent or recent heparin (delayed-onset HIT, 'spontaneous HIT syndrome'). The molecular structure of HIT antigen(s) has been characterized, providing a rationale for future drug design to avoid HIT and improve its treatment. The poor correlation between partial thromboplastin time and plasma argatroban levels (risking subtherapeutic anticoagulation) and need for intravenous administration of argatroban have led to increasing 'off-label' treatment with fondaparinux or one of the direct oral anticoagulants. SUMMARY Understanding the molecular mechanisms and unusual clinical features of HIT will improve its management.
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20
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Röselová P, Obr A, Holoubek A, Grebeňová D, Kuželová K. Adhesion structures in leukemia cells and their regulation by Src family kinases. Cell Adh Migr 2017; 12:286-298. [PMID: 28678601 DOI: 10.1080/19336918.2017.1344796] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Interaction of leukemia blasts with the bone marrow extracellular matrix often results in protection of leukemia cells from chemotherapy and in persistence of the residual disease which is on the basis of subsequent relapses. The adhesion signaling pathways have been extensively studied in adherent cells as well as in mature haematopoietic cells, but the adhesion structures and signaling in haematopoietic stem and progenitor cells, either normal or malignant, are much less explored. We analyzed the interaction of leukemia cells with fibronectin (FN) using interference reflection microscopy, immunofluorescence, measurement of adherent cell fraction, real-time microimpedance measurement and live cell imaging. We found that leukemia cells form very dynamic adhesion structures similar to early stages of focal adhesions. In contrast to adherent cells, where Src family kinases (SFK) belong to important regulators of focal adhesion dynamics, we observed only minor effects of SFK inhibitor dasatinib on leukemia cell binding to FN. The relatively weak involvement of SFK in adhesion structure regulation might be associated with the lack of cytoskeletal mechanical tension in leukemia cells. On the other hand, active Lyn kinase was found to specifically localize to leukemia cell adhesion structures and a less firm cell attachment to FN was often associated with higher Lyn activity (this unexpectedly occurred also after cell treatment with the inhibitor SKI-1). Lyn thus may be important for signaling from integrin-associated complexes to other processes in leukemia cells.
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Affiliation(s)
- Pavla Röselová
- a Department of Proteomics , Institute of Hematology and Blood Transfusion , U Nemocnice 1, Prague , Czech Republic
| | - Adam Obr
- a Department of Proteomics , Institute of Hematology and Blood Transfusion , U Nemocnice 1, Prague , Czech Republic
| | - Aleš Holoubek
- a Department of Proteomics , Institute of Hematology and Blood Transfusion , U Nemocnice 1, Prague , Czech Republic
| | - Dana Grebeňová
- a Department of Proteomics , Institute of Hematology and Blood Transfusion , U Nemocnice 1, Prague , Czech Republic
| | - Kateřina Kuželová
- a Department of Proteomics , Institute of Hematology and Blood Transfusion , U Nemocnice 1, Prague , Czech Republic
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Chen HY, Lin MH, Chen CC, Shu JC. The expression of fibronectin is significantly suppressed in macrophages to exert a protective effect against Staphylococcus aureus infection. BMC Microbiol 2017; 17:92. [PMID: 28407745 PMCID: PMC5390343 DOI: 10.1186/s12866-017-1003-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 04/07/2017] [Indexed: 11/20/2022] Open
Abstract
Background Fibronectin (Fn) plays a major role in the attachment of Staphylococcus aureus to host cells by bridging staphylococcal fibronectin-binding proteins (FnBPs) and cell-surface integrins. A previous study demonstrated that the phagocytosis of S. aureus by macrophages is enhanced in the presence of exogenous Fn. We recently found that FnBPs overexpression also enhances phagocytic activity. The effect of S. aureus infection on the expression of macrophage Fn was investigated. Result The level of Fn secreted by monocytes (THP-1), macrophages, human lung adenocarcinoma (A549) cells, and hepatocellular carcinoma (HepG2) cells in response to S. aureus infection was determined by Western blotting and it was significantly suppressed only in macrophages. The activation of signaling pathways associated with Fn regulation in macrophages and HepG2 cells was also investigated by Western blotting. Erk was activated in both macrophages and HepG2 cells, whereas Src-JNK-c-Jun signaling was only activated in macrophages. A significant decrease in macrophage viability was observed in response to S. aureus infection in the presence of exogenous Fn. Conclusion The Src-JNK-c-Jun signaling pathway was activated in macrophages in response to S. aureus infection and resulted in the suppression of Fn expression. This suppression may play a protective role in macrophages against S. aureus infection. This study provides the first demonstration that Fn is suppressed in macrophages by S. aureus infection. Electronic supplementary material The online version of this article (doi:10.1186/s12866-017-1003-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hong-Yi Chen
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, No. 259, Wenhua 1st Road, Guishan, Taoyuan, 333, Taiwan
| | - Mei-Hui Lin
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, No. 259, Wenhua 1st Road, Guishan, Taoyuan, 333, Taiwan.,Research Center for Pathogenic Bacteria, Chang Gung University, Taoyuan, Taiwan.,Department of Laboratory Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chien-Cheng Chen
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Jwu-Ching Shu
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, No. 259, Wenhua 1st Road, Guishan, Taoyuan, 333, Taiwan. .,Research Center for Pathogenic Bacteria, Chang Gung University, Taoyuan, Taiwan. .,Department of Laboratory Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
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Poulter NS, Pollitt AY, Owen DM, Gardiner EE, Andrews RK, Shimizu H, Ishikawa D, Bihan D, Farndale RW, Moroi M, Watson SP, Jung SM. Clustering of glycoprotein VI (GPVI) dimers upon adhesion to collagen as a mechanism to regulate GPVI signaling in platelets. J Thromb Haemost 2017; 15:549-564. [PMID: 28058806 PMCID: PMC5347898 DOI: 10.1111/jth.13613] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Indexed: 01/01/2023]
Abstract
Essentials Dimeric high-affinity collagen receptor glycoprotein VI (GPVI) is present on resting platelets. Spatio-temporal organization of platelet GPVI-dimers was evaluated using advanced microscopy. Upon platelet adhesion to collagenous substrates, GPVI-dimers coalesce to form clusters. Clustering of GPVI-dimers may increase avidity and facilitate platelet activation SUMMARY: Background Platelet glycoprotein VI (GPVI) binding to subendothelial collagen exposed upon blood vessel injury initiates thrombus formation. Dimeric GPVI has high affinity for collagen, and occurs constitutively on resting platelets. Objective To identify higher-order oligomerization (clustering) of pre-existing GPVI dimers upon interaction with collagen as a mechanism to initiate GPVI-mediated signaling. Methods GPVI was located by use of fluorophore-conjugated GPVI dimer-specific Fab (antigen-binding fragment). The tested substrates include Horm collagen I fibers, soluble collagen III, GPVI-specific collagen peptides, and fibrinogen. GPVI dimer clusters on the platelet surface interacting with these substrates were visualized with complementary imaging techniques: total internal reflection fluorescence microscopy to monitor real-time interactions, and direct stochastic optical reconstruction microscopy (dSTORM), providing relative quantification of GPVI cluster size and density. Confocal microscopy was used to locate GPVI dimer clusters, glycoprotein Ib, integrin α2 β1 , and phosphotyrosine. Results Upon platelet adhesion to all collagenous substrates, GPVI dimers coalesced to form clusters; notably clusters formed along the fibers of Horm collagen. dSTORM revealed that GPVI density within clusters depended on the substrate, collagen III being the most effective. Clusters on fibrinogen-adhered platelets were much smaller and more numerous; whether these are pre-existing oligomers of GPVI dimers or fibrinogen-induced is not clear. Some GPVI dimer clusters colocalized with areas of phosphotyrosine, indicative of signaling activity. Integrin α2 β1 was localized to collagen fibers close to GPVI dimer clusters. GPVI clustering depends on a dynamic actin cytoskeleton. Conclusions Platelet adhesion to collagen induces GPVI dimer clustering. GPVI clustering increases both avidity for collagen and the proximity of GPVI-associated signaling molecules, which may be crucial for the initiation and persistence of signaling.
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Affiliation(s)
- N. S. Poulter
- Institute of Cardiovascular SciencesCollege of Medical and Dental SciencesUniversity of BirminghamBirminghamUK
- Centre for Membrane Proteins and Receptors (COMPARE)College of Medical and Dental SciencesUniversity of BirminghamBirminghamUK
| | - A. Y. Pollitt
- Institute of Cardiovascular SciencesCollege of Medical and Dental SciencesUniversity of BirminghamBirminghamUK
- Present address: Institute for Cardiovascular and Metabolic ResearchSchool of Biological SciencesUniversity of ReadingReadingRG6 6ASUK
| | - D. M. Owen
- Department of Physics and Randall Division of Cell and Molecular BiophysicsKing's College LondonLondonUK
| | - E. E. Gardiner
- Department of Cancer Biology and TherapeuticsJohn Curtin School of Medical ResearchAustralian National UniversityCanberraACTAustralia
| | - R. K. Andrews
- Australian Centre for Blood DiseasesMonash UniversityMelbourneVictoriaAustralia
| | - H. Shimizu
- Research DepartmentChemo‐Sero‐Therapeutic Research InstituteKaketsukenKumamotoJapan
| | - D. Ishikawa
- Research DepartmentChemo‐Sero‐Therapeutic Research InstituteKaketsukenKumamotoJapan
| | - D. Bihan
- Department of BiochemistryUniversity of CambridgeCambridgeUK
| | - R. W. Farndale
- Department of BiochemistryUniversity of CambridgeCambridgeUK
| | - M. Moroi
- Department of BiochemistryUniversity of CambridgeCambridgeUK
| | - S. P. Watson
- Institute of Cardiovascular SciencesCollege of Medical and Dental SciencesUniversity of BirminghamBirminghamUK
- Centre for Membrane Proteins and Receptors (COMPARE)College of Medical and Dental SciencesUniversity of BirminghamBirminghamUK
| | - S. M. Jung
- Department of BiochemistryUniversity of CambridgeCambridgeUK
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