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Pottecher J, Raffi F, Jandrot-Perrus M, Binay S, Comenducci A, Desort-Henin V, François D, Gharakhanian S, Labart M, Meilhoc A, Toledano E, Pletan Y, Avenard G, Sato VH. Targeting GPVI with glenzocimab in COVID-19 patients: Results from a randomized clinical trial. PLoS One 2024; 19:e0302897. [PMID: 38885234 PMCID: PMC11182546 DOI: 10.1371/journal.pone.0302897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 04/11/2024] [Indexed: 06/20/2024] Open
Abstract
BACKGROUND Glenzocimab is a novel antithrombotic agent which targets platelet glycoprotein VI (GPVI) and does not induce haemorrhage. SARS-CoV-2 triggers a prothrombotic state and lung injury whose mechanisms include coagulopathy, endothelial dysfunction, and inflammation with dysregulated platelets. METHODS AND PATIENTS GARDEN was a randomised double-blind, exploratory phase II study of glenzocimab in SARS-CoV-2 respiratory failure (NCT04659109). PCR+ adults in Brazil and France (7 centres) were randomized to standard-of-care (SOC) plus glenzocimab (1000 mg/dayx3 days) or placebo, followed for 40 days. Primary efficacy endpoint was clinical progression at Day 4. All analyses concerned the intention-to-treat population. RESULTS Between December 2020 and August 2021, 61 patients received at least one dose (30 glenzocimab vs 32 placebo) and 58 completed the study (29 vs 29). Clinical progression of COVID-19 ARDS was not statistically different between glenzocimab and placebo arms (43.3% and 29.0%, respectively; p = 0.245). Decrease in the NEWS-2 category at D4 was statistically significant (p = 0.0290) in the glenzocimab arm vs placebo. No Serious Adverse Event (SAE) was deemed related to study drug; bleeding related events were reported in 6 patients (7 events) and 4 patients (4 events) in glenzocimab and placebo arms, respectively. CONCLUSIONS Therapeutic GPVI inhibition assessment during COVID-19 was conducted in response to a Public Health emergency. Glenzocimab in coagulopathic patients under therapeutic heparin was neither associated with increased bleeding, nor SAE. Clinical impact of glenzocimab on COVID-19 ARDS was not demonstrated. A potential role for GPVI inhibition in other types of ARDS deserves further experimentation. Glenzocimab is currently studied in stroke (ACTISAVE: NCT05070260) and cardiovascular indications.
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Affiliation(s)
- Julien Pottecher
- Strasbourg University Hospital, UR3072, FHU OMICARE, FMTS, Strasbourg, France
| | - Francois Raffi
- Nantes Université, CHU Nantes, INSERM, Department of Infectious Diseases, CIC 1413, Nantes, France
| | | | | | | | | | | | - Shahin Gharakhanian
- Acticor-Biotech, Paris, France
- Shahin Gharakhanian MD Consulting LLC, Cambridge Innovation Center, Cambridge, MA, United States of America
| | | | | | | | | | | | - Victor H. Sato
- International Research Center, Hospital Alemão Oswaldo Cruz, Sao Paulo, Brazil
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2
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Hearn JI, Gardiner EE. Research and Clinical Approaches to Assess Platelet Function in Flowing Blood. Arterioscler Thromb Vasc Biol 2023; 43:1775-1783. [PMID: 37615110 DOI: 10.1161/atvbaha.123.317048] [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] [Indexed: 08/25/2023]
Abstract
Platelet adhesion and activation is fundamental to the formation of a hemostatic response to limit loss of blood and instigate wound repair to seal a site of vascular injury. The process of platelet aggregate formation is supported by the coagulation system driving injury-proximal formation of thrombin, which converts fibrinogen to insoluble fibrin. This highly coordinated series of molecular and membranous events must be routinely achieved in flowing blood, at vascular fluid shear rates that place significant strain on molecular and cellular interactions. Platelets have long been recognized to be able to slow down and adhere to sites of vascular injury and then activate and recruit more platelets that forge and strengthen adhesive ties with the vascular wall under these conditions. It has been a major challenge for the Platelet Research Community to construct experimental conditions that allow precise definition of the molecular steps occurring under flow. This brief review will discuss work to date from our group, as well as others that has furthered our understanding of platelet function in flowing blood.
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Affiliation(s)
- James I Hearn
- Division of Genome Science and Cancer, John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Elizabeth E Gardiner
- Division of Genome Science and Cancer, John Curtin School of Medical Research, The Australian National University, Canberra, Australia
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Pennings GJ, Reddel CJ, Chen VM, Gnanenthiran SR, Kritharides L. Perspective: Collagen induced platelet activation via the GPVI receptor as a primary target of colchicine in cardiovascular disease. Front Cardiovasc Med 2023; 9:1104744. [PMID: 36741844 PMCID: PMC9892722 DOI: 10.3389/fcvm.2022.1104744] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 12/30/2022] [Indexed: 01/20/2023] Open
Abstract
Colchicine has been demonstrated to reduce cardiovascular death, myocardial infarction (MI), ischemic stroke, and ischemia-driven coronary revascularization in people with coronary artery disease (CAD). These reductions were observed even in patients already taking antiplatelet therapy. As well as having anti-inflammatory effects, colchicine demonstrates antiplatelet effects. We propose that colchicine's antiplatelet effects primarily target collagen-induced platelet activation via the collagen receptor, glycoprotein (GP)VI, which is critical for arterial thrombosis formation. In settings such as stroke and MI, GPVI signaling is upregulated. We have demonstrated in vitro that therapeutic concentrations of colchicine lead to a decrease in collagen-induced platelet aggregation and alter GPVI signaling. Clinical studies of colchicine given for 6 months lead to a significant reduction in serum GPVI levels in CAD patients, which may ameliorate thrombotic risk. Future evaluation of the effects of colchicine in clinical trials should include assessment of its effects on collagen-mediated platelet activation, and consideration be given to quantifying the contribution of such antiplatelet effects additional to the known anti-inflammatory effects of colchicine.
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Affiliation(s)
- Gabrielle J. Pennings
- Vascular Biology Group, ANZAC Research Institute, The University of Sydney, Concord, NSW, Australia,Department of Cardiology, Concord Repatriation General Hospital, Concord, NSW, Australia
| | - Caroline J. Reddel
- Vascular Biology Group, ANZAC Research Institute, The University of Sydney, Concord, NSW, Australia
| | - Vivien M. Chen
- Department of Haematology, Concord Repatriation General Hospital, Concord, NSW, Australia,Platelet, Thrombosis Research Laboratory, ANZAC Research Institute, The University of Sydney, Concord, NSW, Australia
| | - Sonali R. Gnanenthiran
- Vascular Biology Group, ANZAC Research Institute, The University of Sydney, Concord, NSW, Australia,Department of Cardiology, Concord Repatriation General Hospital, Concord, NSW, Australia,The George Institute for Global Health, University of New South Wales, Newtown, NSW, Australia
| | - Leonard Kritharides
- Vascular Biology Group, ANZAC Research Institute, The University of Sydney, Concord, NSW, Australia,Department of Cardiology, Concord Repatriation General Hospital, Concord, NSW, Australia,*Correspondence: Leonard Kritharides ✉
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Affiliation(s)
- Bart Spaetgens
- Department of Internal Medicine, Division of General Internal Medicine, Section Geriatric Medicine, Maastricht University Medical Center and Cardiovascular Research Institute Maastricht, Maastricht, the Netherlands
| | - Magdolna Nagy
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands
| | - Hugo Ten Cate
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands
- Thrombosis Expertise Center, Department of Internal Medicine, Maastricht University Medical Center, Maastricht, the Netherlands
- Center for Thrombosis and Hemostasis, Gutenberg University Medical Center, Mainz, Germany
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5
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Tullemans BM, Karel MF, Léopold V, ten Brink MS, Baaten CC, Maas SL, de Vos AF, Eble JA, Nijziel MR, van der Vorst EP, Cosemans JM, Heemskerk JW, Claushuis TA, Kuijpers MJ. Comparison of inhibitory effects of irreversible and reversible Btk inhibitors on platelet function. EJHAEM 2021; 2:685-699. [PMID: 35845214 PMCID: PMC9175945 DOI: 10.1002/jha2.269] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 07/13/2021] [Accepted: 07/13/2021] [Indexed: 12/11/2022]
Abstract
All irreversible Bruton tyrosine kinase (Btk) inhibitors including ibrutinib and acalabrutinib induce platelet dysfunction and increased bleeding risk. New reversible Btk inhibitors were developed, like MK-1026. The mechanism underlying increased bleeding tendency with Btk inhibitors remains unclear. We investigated the effects of ibrutinib, acalabrutinib and MK-1026 on platelet function in healthy volunteers, patients and Btk-deficient mice, together with off-target effects on tyrosine kinase phosphorylation. All inhibitors suppressed GPVI- and CLEC-2-mediated platelet aggregation, activation and secretion in a dose-dependent manner. Only ibrutinib inhibited thrombus formation on vWF-co-coated surfaces, while on collagen this was not affected. In blood from Btk-deficient mice, collagen-induced thrombus formation under flow was reduced, but preincubation with either inhibitor was without additional effects. MK-1026 showed less off-target effects upon GPVI-induced TK phosphorylation as compared to ibrutinib and acalabrutinib. In ibrutinib-treated patients, GPVI-stimulated platelet activation, and adhesion on vWF-co-coated surfaces were inhibited, while CLEC-2 stimulation induced variable responses. The dual inhibition of GPVI and CLEC-2 signalling by Btk inhibitors might account for the increased bleeding tendency, with ibrutinib causing more high-grade bleedings due to additional inhibition of platelet-vWF interaction. As MK-1026 showed less off-target effects and only affected activation of isolated platelets, it might be promising for future treatment.
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Affiliation(s)
- Bibian M.E. Tullemans
- Department of BiochemistryCardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
| | - Mieke F.A. Karel
- Department of BiochemistryCardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
| | - Valentine Léopold
- Center for Experimental and Molecular MedicineAmsterdam University Medical Centres, Academic Medical CentreUniversity of AmsterdamAmsterdamThe Netherlands
- Hopital LariboisiereDepartment of Anaesthesiology and Critical CareParisFrance
| | - Marieke S. ten Brink
- Center for Experimental and Molecular MedicineAmsterdam University Medical Centres, Academic Medical CentreUniversity of AmsterdamAmsterdamThe Netherlands
| | - Constance C.F.M.J. Baaten
- Department of BiochemistryCardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
- Institute for Molecular Cardiovascular Research (IMCAR)University Hospital AachenAachenGermany
| | - Sanne L. Maas
- Institute for Molecular Cardiovascular Research (IMCAR)University Hospital AachenAachenGermany
- Interdisciplinary Center for Clinical Research (IZKF)RWTH Aachen UniversityAachenGermany
| | - Alex F. de Vos
- Center for Experimental and Molecular MedicineAmsterdam University Medical Centres, Academic Medical CentreUniversity of AmsterdamAmsterdamThe Netherlands
| | - Johannes A. Eble
- Institute of Physiological Chemistry and PathobiochemistryUniversity of MünsterMünsterGermany
| | - Marten R. Nijziel
- Department of HaematologyCatharina Hospital EindhovenEindhovenThe Netherlands
| | - Emiel P.C. van der Vorst
- Institute for Molecular Cardiovascular Research (IMCAR)University Hospital AachenAachenGermany
- Interdisciplinary Center for Clinical Research (IZKF)RWTH Aachen UniversityAachenGermany
- Department of PathologyCardiovascular Research Institute Maastricht (CARIM)Maastricht University Medical CentreMaastrichtNetherlands
- Institute for Cardiovascular Prevention (IPEK)Ludwig‐Maximilians‐University MunichMunichGermany
| | - Judith M.E.M. Cosemans
- Department of BiochemistryCardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
| | - Johan W.M. Heemskerk
- Department of BiochemistryCardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
| | | | - Marijke J.E. Kuijpers
- Department of BiochemistryCardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
- Thrombosis Expertise Centre, Heart and Vascular CentreMaastricht University Medical CentreMaastrichtThe Netherlands
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Gupta S, Brass LF. Glycoprotein VI Blockade: Not Just Targeting Collagen Anymore? Arterioscler Thromb Vasc Biol 2020; 40:1964-1966. [PMID: 32845775 DOI: 10.1161/atvbaha.120.315059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Shuchi Gupta
- From the Hematology-Oncology Division, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia
| | - Lawrence F Brass
- From the Hematology-Oncology Division, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia
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Platelets in Healthy and Disease States: From Biomarkers Discovery to Drug Targets Identification by Proteomics. Int J Mol Sci 2020; 21:ijms21124541. [PMID: 32630608 PMCID: PMC7352998 DOI: 10.3390/ijms21124541] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/15/2020] [Accepted: 06/24/2020] [Indexed: 12/16/2022] Open
Abstract
Platelets are a heterogeneous small anucleate blood cell population with a central role both in physiological haemostasis and in pathological states, spanning from thrombosis to inflammation, and cancer. Recent advances in proteomic studies provided additional important information concerning the platelet biology and the response of platelets to several pathophysiological pathways. Platelets circulate systemically and can be easily isolated from human samples, making proteomic application very interesting for characterizing the complexity of platelet functions in health and disease as well as for identifying and quantifying potential platelet proteins as biomarkers and novel antiplatelet therapeutic targets. To date, the highly dynamic protein content of platelets has been studied in resting and activated platelets, and several subproteomes have been characterized including platelet-derived microparticles, platelet granules, platelet releasates, platelet membrane proteins, and specific platelet post-translational modifications. In this review, a critical overview is provided on principal platelet proteomic studies focused on platelet biology from signaling to granules content, platelet proteome changes in several diseases, and the impact of drugs on platelet functions. Moreover, recent advances in quantitative platelet proteomics are discussed, emphasizing the importance of targeted quantification methods for more precise, robust and accurate quantification of selected proteins, which might be used as biomarkers for disease diagnosis, prognosis and therapy, and their strong clinical impact in the near future.
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Montague SJ, Lim YJ, Lee WM, Gardiner EE. Imaging Platelet Processes and Function-Current and Emerging Approaches for Imaging in vitro and in vivo. Front Immunol 2020; 11:78. [PMID: 32082328 PMCID: PMC7005007 DOI: 10.3389/fimmu.2020.00078] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 01/13/2020] [Indexed: 12/22/2022] Open
Abstract
Platelets are small anucleate cells that are essential for many biological processes including hemostasis, thrombosis, inflammation, innate immunity, tumor metastasis, and wound healing. Platelets circulate in the blood and in order to perform all of their biological roles, platelets must be able to arrest their movement at an appropriate site and time. Our knowledge of how platelets achieve this has expanded as our ability to visualize and quantify discreet platelet events has improved. Platelets are exquisitely sensitive to changes in blood flow parameters and so the visualization of rapid intricate platelet processes under conditions found in flowing blood provides a substantial challenge to the platelet imaging field. The platelet's size (~2 μm), rapid activation (milliseconds), and unsuitability for genetic manipulation, means that appropriate imaging tools are limited. However, with the application of modern imaging systems to study platelet function, our understanding of molecular events mediating platelet adhesion from a single-cell perspective, to platelet recruitment and activation, leading to thrombus (clot) formation has expanded dramatically. This review will discuss current platelet imaging techniques in vitro and in vivo, describing how the advancements in imaging have helped answer/expand on platelet biology with a particular focus on hemostasis. We will focus on platelet aggregation and thrombus formation, and how platelet imaging has enhanced our understanding of key events, highlighting the knowledge gained through the application of imaging modalities to experimental models in vitro and in vivo. Furthermore, we will review the limitations of current imaging techniques, and questions in thrombosis research that remain to be addressed. Finally, we will speculate how the same imaging advancements might be applied to the imaging of other vascular cell biological functions and visualization of dynamic cell-cell interactions.
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Affiliation(s)
- Samantha J. Montague
- ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Yean J. Lim
- ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
- Research School of Electrical, Energy and Materials Engineering, The Australian National University, Canberra, ACT, Australia
| | - Woei M. Lee
- ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
- Research School of Electrical, Energy and Materials Engineering, The Australian National University, Canberra, ACT, Australia
| | - Elizabeth E. Gardiner
- ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
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