1
|
Pannone G, Pedicillo MC, De Stefano IS, Angelillis F, Barile R, Pannone C, Villani G, Miele F, Municinò M, Ronchi A, Serviddio G, Zito Marino F, Franco R, Colangelo T, Zamparese R. The Role of TLR-2 in Lethal COVID-19 Disease Involving Medullary and Resident Lung Megakaryocyte Up-Regulation in the Microthrombosis Mechanism. Cells 2024; 13:854. [PMID: 38786077 PMCID: PMC11120208 DOI: 10.3390/cells13100854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/27/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024] Open
Abstract
Patients with COVID-19 have coagulation and platelet disorders, with platelet alterations and thrombocytopenia representing negative prognostic parameters associated with severe forms of the disease and increased lethality. METHODS The aim of this study was to study the expression of platelet glycoprotein IIIa (CD61), playing a critical role in platelet aggregation, together with TRL-2 as a marker of innate immune activation. RESULTS A total of 25 patients were investigated, with the majority (24/25, 96%) having co-morbidities and dying from a fatal form of SARS-CoV-2(+) infection (COVID-19+), with 13 men and 12 females ranging in age from 45 to 80 years. When compared to a control group of SARS-CoV-2 (-) negative lungs (COVID-19-), TLR-2 expression was up-regulated in a subset of patients with deadly COVID-19 fatal lung illness. The proportion of Spike-1 (+) patients found by PCR and ISH correlates to the proportion of Spike-S1-positive cases as detected by digital pathology examination. Furthermore, CD61 expression was considerably higher in the lungs of deceased patients. In conclusion, we demonstrate that innate immune prolonged hyperactivation is related to platelet/megakaryocyte over-expression in the lung. CONCLUSIONS Microthrombosis in deadly COVID-19+ lung disease is associated with an increase in the number of CD61+ platelets and megakaryocytes in the pulmonary interstitium, as well as their functional activation; this phenomenon is associated with increased expression of innate immunity TLR2+ cells, which binds the SARS-CoV-2 E protein, and significantly with the persistence of the Spike-S1 viral sequence.
Collapse
Affiliation(s)
- Giuseppe Pannone
- Department of Clinical and Experimental Medicine, University of Foggia, Viale L.Pinto 1, 71122 Foggia, Italy; (M.C.P.); (I.S.D.S.); (F.A.)
| | - Maria Carmela Pedicillo
- Department of Clinical and Experimental Medicine, University of Foggia, Viale L.Pinto 1, 71122 Foggia, Italy; (M.C.P.); (I.S.D.S.); (F.A.)
| | - Ilenia Sara De Stefano
- Department of Clinical and Experimental Medicine, University of Foggia, Viale L.Pinto 1, 71122 Foggia, Italy; (M.C.P.); (I.S.D.S.); (F.A.)
| | - Francesco Angelillis
- Department of Clinical and Experimental Medicine, University of Foggia, Viale L.Pinto 1, 71122 Foggia, Italy; (M.C.P.); (I.S.D.S.); (F.A.)
| | - Raffaele Barile
- Department of Medical and Surgical Sciences, University of Foggia, Viale L.Pinto 1, 71122 Foggia, Italy; (R.B.); (G.S.); (T.C.)
| | - Chiara Pannone
- Faculty of Medicine, Università della Campania “Luigi Vanvitelli”, 80131 Naples, Italy;
| | - Giuliana Villani
- Policlinico Riuniti, University-Hospital, Viale L.Pinto 1, 71122 Foggia, Italy;
| | - Francesco Miele
- Department of Surgery, University of Campania “L Vanvitelli”, 80138 Naples, Italy;
| | - Maurizio Municinò
- Forensic Medicine Unit, “S. Giuliano” Hospital, Via Giambattista Basile, 80014 Giugliano in Campania, Italy;
| | - Andrea Ronchi
- Pathology Unit, Department of Mental and Physical Health and Preventive Medicine, University of Campania “L Vanvitelli”, Via Luciano Armanni, 80138 Naples, Italy; (A.R.); (F.Z.M.); (R.F.)
| | - Gaetano Serviddio
- Department of Medical and Surgical Sciences, University of Foggia, Viale L.Pinto 1, 71122 Foggia, Italy; (R.B.); (G.S.); (T.C.)
| | - Federica Zito Marino
- Pathology Unit, Department of Mental and Physical Health and Preventive Medicine, University of Campania “L Vanvitelli”, Via Luciano Armanni, 80138 Naples, Italy; (A.R.); (F.Z.M.); (R.F.)
| | - Renato Franco
- Pathology Unit, Department of Mental and Physical Health and Preventive Medicine, University of Campania “L Vanvitelli”, Via Luciano Armanni, 80138 Naples, Italy; (A.R.); (F.Z.M.); (R.F.)
| | - Tommaso Colangelo
- Department of Medical and Surgical Sciences, University of Foggia, Viale L.Pinto 1, 71122 Foggia, Italy; (R.B.); (G.S.); (T.C.)
- Cancer Cell Signalling Unit, Institute for Stem-Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), IRCCS Fondazione Casa Sollievo della Sofferenza, Viale Cappuccini sc.c., San Giovanni Rotondo, 71013 Foggia, Italy
| | - Rosanna Zamparese
- Legal Medicine Unit, Ascoli Piceno Hospital C-G. Mazzoni, Viale Degli Iris 13, 63100 Ascoli Piceno, Italy
| |
Collapse
|
2
|
Xu X, Wang Y, Tao Y, Dang W, Yang B, Li Y. The role of platelets in sepsis: A review. BIOMOLECULES & BIOMEDICINE 2024; 24:741-752. [PMID: 38236204 PMCID: PMC11293227 DOI: 10.17305/bb.2023.10135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/08/2024] [Accepted: 01/18/2024] [Indexed: 01/19/2024]
Abstract
Sepsis, a life-threatening condition characterized by organ dysfunction, results from a complex series of pathophysiological mechanisms including immune dysfunction, an uncontrolled inflammatory response, and coagulation abnormalities. It is a major contributor to global mortality and severe disease development. Platelets, abundant in the circulatory system, are sensitive to changes in the body's internal environment and are among the first cells to respond to dysregulated pro-inflammatory and pro-coagulant reactions at the onset of sepsis. In the initial stages of sepsis, the coagulation cascade, inflammatory response, and endothelial tissue damage perpetually trigger platelet activation. These activated platelets then engage in complex inflammatory and immune reactions, potentially leading to organ dysfunction. Therefore, further research is essential to fully understand the role of platelets in sepsis pathology and to develop effective therapeutic strategies targeting the associated pathogenic pathways. This review delves into the involvement of platelets in sepsis and briefly outlines the clinical applications of associated biomarkers.
Collapse
Affiliation(s)
- Xinxin Xu
- Department of Intensive Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Emergency, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yurou Wang
- Department of Intensive Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Emergency, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yiming Tao
- Department of Intensive Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Emergency, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Wenpei Dang
- Department of Intensive Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Emergency, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Bin Yang
- Department of Intensive Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Emergency, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yongsheng Li
- Department of Intensive Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Emergency, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| |
Collapse
|
3
|
Spinello I, Saulle E, Quaranta MT, Pelosi E, Castelli G, Cerio A, Pasquini L, Morsilli O, Dupuis ML, Labbaye C. AC-73 and Syrosingopine Inhibit SARS-CoV-2 Entry into Megakaryocytes by Targeting CD147 and MCT4. Viruses 2024; 16:82. [PMID: 38257782 PMCID: PMC10818282 DOI: 10.3390/v16010082] [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: 11/23/2023] [Revised: 12/20/2023] [Accepted: 12/23/2023] [Indexed: 01/24/2024] Open
Abstract
Coagulation disorders are described in COVID-19 and long COVID patients. In particular, SARS-CoV-2 infection in megakaryocytes, which are precursors of platelets involved in thrombotic events in COVID-19, long COVID and, in rare cases, in vaccinated individuals, requires further investigation, particularly with the emergence of new SARS-CoV-2 variants. CD147, involved in the regulation of inflammation and required to fight virus infection, can facilitate SARS-CoV-2 entry into megakaryocytes. MCT4, a co-binding protein of CD147 and a key player in the glycolytic metabolism, could also play a role in SARS-CoV-2 infection. Here, we investigated the susceptibility of megakaryocytes to SARS-CoV-2 infection via CD147 and MCT4. We performed infection of Dami cells and human CD34+ hematopoietic progenitor cells induced to megakaryocytic differentiation with SARS-CoV-2 pseudovirus in the presence of AC-73 and syrosingopine, respective inhibitors of CD147 and MCT4 and inducers of autophagy, a process essential in megakaryocyte differentiation. Both AC-73 and syrosingopine enhance autophagy during differentiation but only AC-73 enhances megakaryocytic maturation. Importantly, we found that AC-73 or syrosingopine significantly inhibits SARS-CoV-2 infection of megakaryocytes. Altogether, our data indicate AC-73 and syrosingopine as inhibitors of SARS-CoV-2 infection via CD147 and MCT4 that can be used to prevent SARS-CoV-2 binding and entry into megakaryocytes, which are precursors of platelets involved in COVID-19-associated coagulopathy.
Collapse
Affiliation(s)
- Isabella Spinello
- National Center for Drug Research and Evaluation, Istituto Superiore di Sanità, 00161 Rome, Italy; (I.S.); (E.S.); (M.T.Q.); (M.L.D.)
| | - Ernestina Saulle
- National Center for Drug Research and Evaluation, Istituto Superiore di Sanità, 00161 Rome, Italy; (I.S.); (E.S.); (M.T.Q.); (M.L.D.)
| | - Maria Teresa Quaranta
- National Center for Drug Research and Evaluation, Istituto Superiore di Sanità, 00161 Rome, Italy; (I.S.); (E.S.); (M.T.Q.); (M.L.D.)
| | - Elvira Pelosi
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, 00161 Rome, Italy; (E.P.); (G.C.); (A.C.)
| | - Germana Castelli
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, 00161 Rome, Italy; (E.P.); (G.C.); (A.C.)
| | - Annamaria Cerio
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, 00161 Rome, Italy; (E.P.); (G.C.); (A.C.)
| | - Luca Pasquini
- Core Facilities, Istituto Superiore di Sanità, 00161 Rome, Italy;
| | - Ornella Morsilli
- Department of Cardiovascular, Endocrine-Metabolic Diseases and Ageing, Istituto Superiore di Sanità, 00161 Rome, Italy;
| | - Maria Luisa Dupuis
- National Center for Drug Research and Evaluation, Istituto Superiore di Sanità, 00161 Rome, Italy; (I.S.); (E.S.); (M.T.Q.); (M.L.D.)
| | - Catherine Labbaye
- National Center for Drug Research and Evaluation, Istituto Superiore di Sanità, 00161 Rome, Italy; (I.S.); (E.S.); (M.T.Q.); (M.L.D.)
| |
Collapse
|
4
|
Mabrouk M, Guessous F, Naya A, Merhi Y, Zaid Y. The Pathophysiological Role of Platelet-Derived Extracellular Vesicles. Semin Thromb Hemost 2023; 49:279-283. [PMID: 36174608 DOI: 10.1055/s-0042-1756705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Platelets are very abundant in the blood, where they play a role in hemostasis, inflammation, and immunity. When activated, platelets undergo a conformational change that allows the release of numerous effector molecules as well as the production of extracellular vesicles, which are circulating submicron vesicles (10 to 1,000 nm in diameter) released into the extracellular space. Extracellular vesicles are formed by the budding of platelet and they carry some of its contents, including nucleic acids, surface proteins, and organelles. While platelets cannot cross tissue barriers, platelet-derived extracellular vesicles can enter the lymph, bone marrow, and synovial fluid. This allows the transfer of diverse contents carried by these platelet-derived vesicles to cell recipients and organs inaccessible to platelets where they can perform many functions. This review highlights the importance of these platelet-derived extracellular vesicles under different physiological and pathophysiological conditions.
Collapse
Affiliation(s)
- Meryem Mabrouk
- Department of Biology, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco.,Department of Biology, Faculty of Sciences, Immunology and Biodiversity Laboratory, Hassan II University, Casablanca, Morocco
| | - Fadila Guessous
- Research of Center, Faculty of Medicine, Mohammed VI University of Health Sciences (UM6SS), Casablanca, Morocco
| | - Abdallah Naya
- Department of Biology, Faculty of Sciences, Immunology and Biodiversity Laboratory, Hassan II University, Casablanca, Morocco
| | - Yahye Merhi
- Laboratory of Thrombosis and Hemostasis, Montreal Heart Institute, Research Center, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Younes Zaid
- Department of Biology, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco.,Department of Biology, Faculty of Sciences, Immunology and Biodiversity Laboratory, Hassan II University, Casablanca, Morocco
| |
Collapse
|
5
|
SARS-CoV-2 Spike Protein and Neutralizing Anti-Spike Protein Antibodies Modulate Blood Platelet Function. Int J Mol Sci 2023; 24:ijms24065312. [PMID: 36982387 PMCID: PMC10049216 DOI: 10.3390/ijms24065312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/06/2023] [Accepted: 03/06/2023] [Indexed: 03/12/2023] Open
Abstract
Several studies report elevated blood platelet activation and altered platelet count in COVID-19 patients, but the role of the SARS-CoV-2 spike protein in this process remains intriguing. Additionally, there is no data that anti-SARS-CoV-2 neutralizing antibodies (nAb) may attenuate spike protein activity toward blood platelets. Our results indicate that under in vitro conditions, the spike protein increased the collagen-stimulated aggregation of isolated platelets and induced the binding of vWF to platelets in ristocetin-treated blood. The spike protein also significantly reduced collagen- or ADP-induced aggregation or decreased GPIIbIIIa (fibrinogen receptor) activation in whole blood, depending on the presence of the anti-spike protein nAb. Our findings suggest that studies on platelet activation/reactivity in COVID-19 patients or in donors vaccinated with anti-SARS-CoV-2 and/or previously-infected COVID-19 should be supported by measurements of spike protein and IgG anti-spike protein antibody concentrations in blood.
Collapse
|
6
|
Goudswaard LJ, Williams CM, Khalil J, Burley KL, Hamilton F, Arnold D, Milne A, Lewis PA, Heesom KJ, Mundell SJ, Davidson AD, Poole AW, Hers I. Alterations in platelet proteome signature and impaired platelet integrin α IIbβ 3 activation in patients with COVID-19. J Thromb Haemost 2023; 21:1307-1321. [PMID: 36716966 PMCID: PMC9883069 DOI: 10.1016/j.jtha.2023.01.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/30/2023]
Abstract
BACKGROUND Patients with COVID-19 are at increased risk of thrombosis, which is associated with altered platelet function and coagulopathy, contributing to excess mortality. OBJECTIVES To characterize the mechanism of altered platelet function in COVID-19 patients. METHODS The platelet proteome, platelet functional responses, and platelet-neutrophil aggregates were compared between patients hospitalized with COVID-19 and healthy control subjects using tandem mass tag proteomic analysis, Western blotting, and flow cytometry. RESULTS COVID-19 patients showed a different profile of platelet protein expression (858 altered of the 5773 quantified). Levels of COVID-19 plasma markers were enhanced in the platelets of COVID-19 patients. Gene ontology pathway analysis demonstrated that the levels of granule secretory proteins were raised, whereas those of platelet activation proteins, such as the thrombopoietin receptor and protein kinase Cα, were lowered. Basally, platelets of COVID-19 patients showed enhanced phosphatidylserine exposure, with unaltered integrin αIIbβ3 activation and P-selectin expression. Agonist-stimulated integrin αIIbβ3 activation and phosphatidylserine exposure, but not P-selectin expression, were decreased in COVID-19 patients. COVID-19 patients had high levels of platelet-neutrophil aggregates, even under basal conditions, compared to controls. This association was disrupted by blocking P-selectin, demonstrating that platelet P-selectin is critical for the interaction. CONCLUSIONS Overall, our data suggest the presence of 2 platelet populations in patients with COVID-19: one of circulating platelets with an altered proteome and reduced functional responses and another of P-selectin-expressing neutrophil-associated platelets. Platelet-driven thromboinflammation may therefore be one of the key factors enhancing the risk of thrombosis in COVID-19 patients.
Collapse
Affiliation(s)
- Lucy J Goudswaard
- School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, UK; Population Health Sciences, Oakfield House, Oakfield Grove, Bristol, BS8 2BN, UK. https://twitter.com/lucygoudswaard
| | - Christopher M Williams
- School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, UK
| | - Jawad Khalil
- School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, UK
| | - Kate L Burley
- School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, UK
| | - Fergus Hamilton
- Population Health Sciences, Oakfield House, Oakfield Grove, Bristol, BS8 2BN, UK; Department of Infection Sciences, North Bristol NHS Trust, Bristol, BS10 5NB, UK
| | - David Arnold
- Academic Respiratory Unit, North Bristol NHS Trust, Bristol, BS10 5NB, UK
| | - Alice Milne
- Academic Respiratory Unit, North Bristol NHS Trust, Bristol, BS10 5NB, UK
| | - Phil A Lewis
- Proteomics Facility, Faculty of Life Sciences, University Walk, University of Bristol, Bristol, BS8 1TD, UK
| | - Kate J Heesom
- Proteomics Facility, Faculty of Life Sciences, University Walk, University of Bristol, Bristol, BS8 1TD, UK
| | - Stuart J Mundell
- School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, UK
| | - Andrew D Davidson
- School of Cellular and Molecular Medicine, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, UK
| | - Alastair W Poole
- School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, UK
| | - Ingeborg Hers
- School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, UK.
| |
Collapse
|
7
|
Dissecting Platelet's Role in Viral Infection: A Double-Edged Effector of the Immune System. Int J Mol Sci 2023; 24:ijms24032009. [PMID: 36768333 PMCID: PMC9916939 DOI: 10.3390/ijms24032009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/11/2022] [Accepted: 12/23/2022] [Indexed: 01/20/2023] Open
Abstract
Platelets play a major role in the processes of primary hemostasis and pathological inflammation-induced thrombosis. In the mid-2000s, several studies expanded the role of these particular cells, placing them in the "immune continuum" and thus changing the understanding of their function in both innate and adaptive immune responses. Among the many receptors they express on their surface, platelets express Toll-Like Receptors (TLRs), key receptors in the inflammatory cell-cell reaction and in the interaction between innate and adaptive immunity. In response to an infectious stimulus, platelets will become differentially activated. Platelet activation is variable depending on whether platelets are activated by a hemostatic or pathogen stimulus. This review highlights the role that platelets play in platelet modulation count and adaptative immune response during viral infection.
Collapse
|
8
|
Sharma S, Tyagi T, Antoniak S. Platelet in thrombo-inflammation: Unraveling new therapeutic targets. Front Immunol 2022; 13:1039843. [PMID: 36451834 PMCID: PMC9702553 DOI: 10.3389/fimmu.2022.1039843] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 10/18/2022] [Indexed: 11/16/2022] Open
Abstract
In the broad range of human diseases, thrombo-inflammation appears as a clinical manifestation. Clinically, it is well characterized in context of superficial thrombophlebitis that is recognized as thrombosis and inflammation of superficial veins. However, it is more hazardous when developed in the microvasculature of injured/inflamed/infected tissues and organs. Several diseases like sepsis and ischemia-reperfusion can cause formation of microvascular thrombosis subsequently leading to thrombo-inflammation. Thrombo-inflammation can also occur in cases of antiphospholipid syndrome, preeclampsia, sickle cell disease, bacterial and viral infection. One of the major contributors to thrombo-inflammation is the loss of normal anti-thrombotic and anti-inflammatory potential of the endothelial cells of vasculature. This manifest itself in the form of dysregulation of the coagulation pathway and complement system, pathologic platelet activation, and increased recruitment of leukocyte within the microvasculature. The role of platelets in hemostasis and formation of thrombi under pathologic and non-pathologic conditions is well established. Platelets are anucleate cells known for their essential role in primary hemostasis and the coagulation pathway. In recent years, studies provide strong evidence for the critical involvement of platelets in inflammatory processes like acute ischemic stroke, and viral infections like Coronavirus disease 2019 (COVID-19). This has encouraged the researchers to investigate the contribution of platelets in the pathology of various thrombo-inflammatory diseases. The inhibition of platelet surface receptors or their intracellular signaling which mediate initial platelet activation and adhesion might prove to be suitable targets in thrombo-inflammatory disorders. Thus, the present review summarizes the concept and mechanism of platelet signaling and briefly discuss their role in sterile and non-sterile thrombo-inflammation, with the emphasis on role of platelets in COVID-19 induced thrombo-inflammation. The aim of this review is to summarize the recent developments in deciphering the role of the platelets in thrombo-inflammation and discuss their potential as pharmaceutical targets.
Collapse
Affiliation(s)
- Swati Sharma
- UNC Blood Research Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Tarun Tyagi
- Yale Cardiovascular Research Center, Yale School of Medicine, New Haven, CT, United States
| | - Silvio Antoniak
- UNC Blood Research Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| |
Collapse
|
9
|
Overduin M, Kervin TA, Tran A. Progressive membrane-binding mechanism of SARS-CoV-2 variant spike proteins. iScience 2022; 25:104722. [PMID: 35813872 PMCID: PMC9251956 DOI: 10.1016/j.isci.2022.104722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/15/2022] [Accepted: 06/28/2022] [Indexed: 12/09/2022] Open
Abstract
Membrane recognition by viral spike proteins is critical for infection. Here we show the host cell membrane-binding surfaces of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike variants Alpha, Beta, Gamma, Delta, Epsilon, Kappa, and Omicron as well as SARS-CoV-1 and pangolin and bat relatives. They show increases in membrane binding propensities over time, with all spike head mutations in variants, and particularly BA.1, impacting the protein's affinity to cell membranes. Comparison of hundreds of structures yields a progressive model of membrane docking in which spike protein trimers shift from initial perpendicular stances to increasingly tilted positions that draw viral particles alongside host cell membranes before optionally engaging angiotensin-converting enzyme 2 (ACE2) receptors. This culminates in the assembly of the symmetric fusion apparatus, with enhanced membrane interactions of variants explaining their unique cell fusion capacities and COVID-19 disease transmission rates.
Collapse
Affiliation(s)
- Michael Overduin
- Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
| | - Troy A. Kervin
- Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
| | - Anh Tran
- Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
| |
Collapse
|
10
|
Lundström A, Sandén P, Mitroulis I, van der Meijden PEJ. Editorial: Platelet Function in COVID-19. Front Cardiovasc Med 2022; 9:912472. [PMID: 35722094 PMCID: PMC9204630 DOI: 10.3389/fcvm.2022.912472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 04/28/2022] [Indexed: 11/29/2022] Open
Affiliation(s)
- Annika Lundström
- Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet (KI), Stockholm, Sweden
- *Correspondence: Annika Lundström
| | - Per Sandén
- Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet (KI), Stockholm, Sweden
| | - Ioannis Mitroulis
- Laboratory of Molecular Hematology, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | - Paola E. J. van der Meijden
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, Netherlands
| |
Collapse
|
11
|
Zaid Y, Merhi Y. Implication of Platelets in Immuno-Thrombosis and Thrombo-Inflammation. Front Cardiovasc Med 2022; 9:863846. [PMID: 35402556 PMCID: PMC8990903 DOI: 10.3389/fcvm.2022.863846] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 03/04/2022] [Indexed: 12/14/2022] Open
Abstract
In addition to their well-described hemostatic function, platelets are active participants in innate and adaptive immunity. Inflammation and immunity are closely related to changes in platelet reactions and enhanced platelet function in thrombo-inflammation, as well as in microbial and virus infections. A platelet’s immune function is incompletely understood, but an important balance exists between its protective and pathogenic responses and its thrombotic and inflammatory functions. As the mediator of vascular homeostasis, platelets interact with neutrophils, bacteria and virus by expressing specific receptors and releasing granules, transferring RNA, and secreting mitochondria, which controls hemostasis and thrombosis, infection, and innate and adaptive immunity. This review focuses on the involvement of platelets during immuno-thrombosis and thrombo-inflammation.
Collapse
Affiliation(s)
- Younes Zaid
- Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco.,Immunology and Biodiversity Laboratory, Department of Biology, Faculty of Sciences, Hassan II University, Casablanca, Morocco
| | - Yahye Merhi
- Laboratory of Thrombosis and Hemostasis, Montreal Heart Institute, Research Center, The Université de Montréal, Montreal, QC, Canada
| |
Collapse
|