1
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Li OQ, Yue H, DeHart AR, Roytenberg R, Aguilar R, Olanipekun O, Bai F, Liu J, Fedorova O, Kennedy D, Thompson E, Pierre SV, Li W. Sodium/Potassium ATPase Alpha 1 Subunit Fine-tunes Platelet GPCR Signaling Function and is Essential for Thrombosis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.13.593923. [PMID: 38798556 PMCID: PMC11118499 DOI: 10.1101/2024.05.13.593923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Background Thrombosis is a major cause of myocardial infarction and ischemic stroke. The sodium/potassium ATPase (NKA), comprising α and β subunits, is crucial in maintaining intracellular sodium and potassium gradients. However, the role of NKA in platelet function and thrombosis remains unclear. Methods We utilized wild-type (WT, α1+/+) and NKA α1 heterozygous (α1+/-) mice, aged 8 to 16 weeks, of both sexes. An intravital microscopy-based, FeCl3-induced carotid artery injury thrombosis model was employed for in vivo thrombosis assessment. Platelet transfusion assays were used to evaluate platelet NKA α1 function on thrombosis. Human platelets isolated from healthy donors and heart failure patients treated with/without digoxin were used for platelet function and signaling assay. Complementary molecular approaches were used for mechanistic studies. Results NKA α1 haplodeficiency significantly reduced its expression on platelets without affecting sodium homeostasis. It significantly inhibited 7.5% FeCl3-induced thrombosis in male but not female mice without disturbing hemostasis. Transfusion of α1+/-, but not α1+/+, platelets to thrombocytopenic WT mice substantially prolonged thrombosis. Treating WT mice with low-dose ouabain or marinobufagenin, both binding NKA α1 and inhibiting its ion-transporting function, markedly inhibited thrombosis in vivo. NKA α1 formed complexes with leucine-glycine-leucine (LGL)-containing platelet receptors, including P2Y12, PAR4, and thromboxane A2 receptor. This binding was significantly attenuated by LGL>SFT mutation or LGL peptide. Haplodeficiency of NKA α1 in mice or ouabain treatment of human platelets notably inhibited ADP-induced platelet aggregation. While not affecting 10% FeCl3-induced thrombosis, NKA α1 haplodeficiency significantly prolonged thrombosis time in mice treated with an ineffective dose of clopidogrel. Conclusion NKA α1 plays an essential role in enhancing platelet activation through binding to LGL-containing platelet GPCRs. NKA α1 haplodeficiency or inhibition with low-dose ouabain and marinobufagenin significantly inhibited thrombosis and sensitized clopidogrel's anti-thrombotic effect. Targeting NKA α1 emerges as a promising antiplatelet and antithrombotic therapeutic strategy.
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Affiliation(s)
- Oliver Q. Li
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV, USA
| | - Hong Yue
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
| | - Autumn R. DeHart
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
| | - Renat Roytenberg
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
| | - Rodrigo Aguilar
- Department of Medicine, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
| | - Olalekan Olanipekun
- Department of Medicine, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
| | - Fang Bai
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
| | - Jiang Liu
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
| | - Olga Fedorova
- National Institute on Aging, Laboratory of Cardiovascular Science of Biomedical Research Center Baltimore, MD, USA
| | - David Kennedy
- Department of Medicine, University of Toledo, Toledo, OH, USA
| | - Ellen Thompson
- Department of Medicine, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
| | - Sandrine V. Pierre
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV, USA
| | - Wei Li
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
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2
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Lu J, Zhang C, Shi S, Li S, Liu J, Wu J, Huang C, Lei M. Stoichiometry and architecture of the platelet membrane complex glycoprotein Ib-IX-V. Biol Chem 2024; 405:91-104. [PMID: 36942505 DOI: 10.1515/hsz-2022-0227] [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: 07/12/2022] [Accepted: 03/06/2023] [Indexed: 03/23/2023]
Abstract
Glycoprotein (GP) Ib-IX-V is the second most abundant platelet receptor for thrombin and other ligands crucial for hemostasis and thrombosis. Its activity is involved in platelet adhesion to vascular injury sites and thrombin-induced platelet aggregation. GPIb-IX-V is a heteromeric complex composed of four subunits, GPIbα, GPIbβ, GPV and GPIX, in a stoichiometric ratio that has been wildly debated. Despite its important physiological roles, the overall structure and molecular arrangement of GPIb-IX-V are not yet fully understood. Here, we purify stable and functional human GPIb-IX-V complex from reconstituted EXPi293F cells in high homogeneity, and perform biochemical and structural characterization of this complex. Single-particle cryo-electron microscopy structure of GPIb-IX-V is determined at ∼11 Å resolution, which unveils the architecture of GPIb-IX-V and its subunit organization. Size-exclusion chromatography-multi-angle static light scattering analysis reveals that GPIb-IX-V contains GPIb-IX and GPV at a 1:1 stoichiometric ratio and surface plasmon resonance assays show that association of GPV leads to slow kinetics of thrombin binding to GPIb-IX-V. Taken together, our results provide the first three-dimensional architecture of the intact GPIb-IX-V complex, which extends our understanding of the structure and functional mechanism of this complex in hemostasis and thrombosis.
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Affiliation(s)
- Juanjuan Lu
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Precision Medicine, Shanghai, China
| | - Chunli Zhang
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Precision Medicine, Shanghai, China
| | - Shaohua Shi
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Precision Medicine, Shanghai, China
| | - Shaobai Li
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Precision Medicine, Shanghai, China
| | - Junling Liu
- Department of Biochemistry and Molecular Cell Biology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jian Wu
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Precision Medicine, Shanghai, China
| | - Chenhui Huang
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Precision Medicine, Shanghai, China
| | - Ming Lei
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Precision Medicine, Shanghai, China
- State Key laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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3
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Hashemzadeh M, Haseefa F, Peyton L, Shadmehr M, Niyas AM, Patel A, Krdi G, Movahed MR. A comprehensive review of the ten main platelet receptors involved in platelet activity and cardiovascular disease. AMERICAN JOURNAL OF BLOOD RESEARCH 2023; 13:168-188. [PMID: 38223314 PMCID: PMC10784121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 06/10/2023] [Indexed: 01/16/2024]
Abstract
Cardiovascular disease (CVD) is a major cause of death worldwide. Although there are many variables that contribute to the development of this disease, it is predominantly the activity of platelets that provides the mechanisms by which this disease prevails. While there are numerous platelet receptors expressed on the surface of platelets, it is largely the consensus that there are 10 main platelet receptors that contribute to a majority of platelet function. Understanding these key platelet receptors is vitally important for patients suffering from myocardial infarction, CVD, and many other diseases that arise due to overactivation or mutations of these receptors. The goal of this manuscript is to review the main platelet receptors that contribute most to platelet activity.
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Affiliation(s)
- Mehrnoosh Hashemzadeh
- University of Arizona College of MedicinePhoenix, AZ, USA
- Pima CollegeTucson, AZ, USA
| | | | - Lee Peyton
- Pima CollegeTucson, AZ, USA
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine and ScienceRochester, MN, USA
| | | | | | - Aamir Patel
- University of Arizona College of MedicinePhoenix, AZ, USA
| | - Ghena Krdi
- University of Arizona College of MedicinePhoenix, AZ, USA
| | - Mohammad Reza Movahed
- University of Arizona College of MedicinePhoenix, AZ, USA
- University of ArizonaTucson, AZ, USA
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4
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Lee CSM, Kaur A, Montague SJ, Hicks SM, Andrews RK, Gardiner EE. Tissue inhibitors of metalloproteinases (TIMPs) modulate platelet ADAM10 activity. Platelets 2023; 34:2288213. [PMID: 38031964 DOI: 10.1080/09537104.2023.2288213] [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: 08/21/2023] [Accepted: 11/21/2023] [Indexed: 12/01/2023]
Abstract
Platelet-specific collagen receptor glycoprotein (GP)VI is stable on the surface of circulating platelets but undergoes ectodomain cleavage on activated platelets. Activation-dependent GPVI metalloproteolysis is primarily mediated by A Disintegrin And Metalloproteinase (ADAM) 10. Regulation of platelet ADAMs activity is not well-defined however Tissue Inhibitors of Metalloproteinases (TIMPs) may play a role. As levels of TIMPs on platelets and the control of ADAMs-mediated shedding by TIMPs has not been evaluated, we quantified the levels of TIMPs on the surface of resting and activated platelets from healthy donors by flow cytometry and multiplex ELISA. Variable levels of all TIMPs could be detected on platelets. Plasma contained significant quantities of TIMP1 and TIMP2, but only trace amounts of TIMP3 and TIMP4. Recombinant TIMP3 strongly ablated resting and activated platelet ADAM10 activity, when monitored using a quenched fluorogenic peptide substrate with ADAM10 specificity. Whilst ADAM10-specific inhibitor GI254023X or ethylenediamine tetraacetic acid (EDTA) could modulate ligand-initiated shedding of GPVI, only recombinant TIMP2 achieved a modest (~20%) inhibition. We conclude that some platelet TIMPs are able to modulate platelet ADAM10 activity but none strongly regulate ligand-dependent shedding of GPVI. Our findings provide new insights into the regulation of platelet receptor sheddase activity.
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Affiliation(s)
- Christine Shu Mei Lee
- Division of Genome Science and Cancer, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Amandeep Kaur
- Division of Genome Science and Cancer, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Samantha J Montague
- Division of Genome Science and Cancer, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Sarah M Hicks
- Division of Genome Science and Cancer, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Robert K Andrews
- Division of Genome Science and Cancer, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Elizabeth E Gardiner
- Division of Genome Science and Cancer, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
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5
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Reichard A, Wanner N, Farha S, Asosingh K. Hematopoietic stem cells and extramedullary hematopoiesis in the lungs. Cytometry A 2023; 103:967-977. [PMID: 37807901 PMCID: PMC10841540 DOI: 10.1002/cyto.a.24804] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 08/02/2023] [Accepted: 09/18/2023] [Indexed: 10/10/2023]
Abstract
Hematopoietic stem cells are key players in hematopoiesis as the body maintains a physiologic steady state, and the signaling pathways and control mechanisms of these dynamic cells are implicated in processes from inflammation to cancer. Although the bone marrow is commonly regarded as the site of hematopoiesis and hematopoietic stem cell residence, these cells also circulate in the blood and reside in extramedullary tissues, including the lungs. Flow cytometry is an invaluable tool in evaluating hematopoietic stem cells, revealing their phenotypes and relative abundances in both healthy and diseased states. This review outlines current protocols and cell markers used in flow cytometric analysis of hematopoietic stem and progenitor cell populations. Specific niches within the bone marrow are discussed, as are metabolic processes that contribute to stem cell self-renewal and differentiation, as well as the role of hematopoietic stem cells outside of the bone marrow at physiologic steady state. Finally, pulmonary extramedullary hematopoiesis and its associated disease states are outlined. Hematopoiesis in the lungs is a new and emerging concept, and discovering ways in which the study of lung-resident hematopoietic stem cells can be translated from murine models to patients will impact clinical treatment.
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Affiliation(s)
- Andrew Reichard
- Department of Inflammation and Immunity, Lerner Research Institute, The Cleveland Clinic, Cleveland, OH, USA
| | - Nicholas Wanner
- Department of Inflammation and Immunity, Lerner Research Institute, The Cleveland Clinic, Cleveland, OH, USA
| | - Samar Farha
- Department of Inflammation and Immunity, Lerner Research Institute, The Cleveland Clinic, Cleveland, OH, USA
- Respiratory Institute, The Cleveland Clinic, Cleveland, OH, USA
| | - Kewal Asosingh
- Department of Inflammation and Immunity, Lerner Research Institute, The Cleveland Clinic, Cleveland, OH, USA
- Flow Cytometry Shared Laboratory Resource, Lerner Research Institute, The Cleveland Clinic, Cleveland, OH, USA
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6
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Zhang T, Xiang Z, Liu L, Ma Z, Panteleev M, Ataullakhanov FI, Shi Q. Bioinspired Platelet-Anchored Electrospun Meshes for Tight Inflammation Manipulation and Chronic Diabetic Wound Healing. Macromol Biosci 2023; 23:e2300036. [PMID: 37259884 DOI: 10.1002/mabi.202300036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/21/2023] [Indexed: 06/02/2023]
Abstract
Tight manipulation of the initial leukocytes infiltration and macrophages plasticity toward the M2 phenotype remain a challenge for diabetic wound healing. Inspired by the platelet function and platelet-macrophage interaction, a platelet-anchored polylactic acid-b-polyethylene glycol-b-polylactic acid (PLA-PEG-PLA) electrospun dressing is developed for inflammatory modulation and diabetic wounds healing acceleration. PLA-PEG-PLA electrospun meshes encapsulated with thymosin β4 (Tβ4) and CaCl2 is fabricated with electrospinning, followed by immersion of electrospun mesh in platelet-rich plasma to firmly anchor the platelets. It is demonstrated that the anchored platelets on electrospun mesh can enhance the initial macrophage recruitment and control the Tβ4 release from electrospun meshes to facilitate the macrophages polarization to the M2 phenotype. The inflammatory regulation promotes the expression of vascular endothelial growth factor and the migration of vascular endothelial cells for angiogenesis, resulting in accelerated diabetic wounds healing. Therefore, this work paved a new way to design platelet-inspired electrospun meshes for inflammation manipulation and diabetic wound healing.
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Affiliation(s)
- Tianci Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Zehong Xiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Lei Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Zhifang Ma
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
| | - Mikhail Panteleev
- Dmitry Rogachev Natl Res Ctr Pediat Hematol Oncol, 1 Samory Mashela St, Moscow, 117198, Russia
- Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 1, build. 2, GSP-1, Moscow, 119991, Russia
| | - Fazly I Ataullakhanov
- Dmitry Rogachev Natl Res Ctr Pediat Hematol Oncol, 1 Samory Mashela St, Moscow, 117198, Russia
- Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 1, build. 2, GSP-1, Moscow, 119991, Russia
| | - Qiang Shi
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
- Key Laboratory of Polymeric Materials Design and Synthesis for Biomedical Function, Soochow University, Suzhou, 215123, China
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7
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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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8
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Mollica MY, Beussman KM, Kandasamy A, Rodríguez LM, Morales FR, Chen J, Manohar K, Del Álamo JC, López JA, Thomas WE, Sniadecki NJ. Distinct platelet F-actin patterns and traction forces on von Willebrand factor versus fibrinogen. Biophys J 2023; 122:3738-3748. [PMID: 37434354 PMCID: PMC10541491 DOI: 10.1016/j.bpj.2023.07.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/27/2023] [Accepted: 07/07/2023] [Indexed: 07/13/2023] Open
Abstract
Upon vascular injury, platelets form a hemostatic plug by binding to the subendothelium and to each other. Platelet-to-matrix binding is initially mediated by von Willebrand factor (VWF) and platelet-to-platelet binding is mediated mainly by fibrinogen and VWF. After binding, the actin cytoskeleton of a platelet drives its contraction, generating traction forces that are important to the cessation of bleeding. Our understanding of the relationship between adhesive environment, F-actin morphology, and traction forces is limited. Here, we examined F-actin morphology of platelets attached to surfaces coated with fibrinogen and VWF. We identified distinct F-actin patterns induced by these protein coatings and found that these patterns were identifiable into three classifications via machine learning: solid, nodular, and hollow. We observed that traction forces for platelets were significantly higher on VWF than on fibrinogen coatings and these forces varied by F-actin pattern. In addition, we analyzed the F-actin orientation in platelets and noted that their filaments were more circumferential when on fibrinogen coatings and having a hollow F-actin pattern, while they were more radial on VWF and having a solid F-actin pattern. Finally, we noted that subcellular localization of traction forces corresponded to protein coating and F-actin pattern: VWF-bound, solid platelets had higher forces at their central region while fibrinogen-bound, hollow platelets had higher forces at their periphery. These distinct F-actin patterns on fibrinogen and VWF and their differences in F-actin orientation, force magnitude, and force localization could have implications in hemostasis, thrombus architecture, and venous versus arterial thrombosis.
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Affiliation(s)
- Molly Y Mollica
- Department of Bioengineering, University of Washington, Seattle, Washington; Division of Hematology, School of Medicine, University of Washington, Seattle, Washington; Bloodworks Research Institute, Seattle, Washington; Department of Mechanical Engineering, University of Maryland, Baltimore County, Baltimore, Maryland.
| | - Kevin M Beussman
- Department of Mechanical Engineering, University of Washington, Seattle, Washington; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington
| | - Adithan Kandasamy
- Department of Mechanical Engineering, University of Washington, Seattle, Washington; Center for Cardiovascular Biology, University of Washington, Seattle, Washington
| | | | | | - Junmei Chen
- Bloodworks Research Institute, Seattle, Washington
| | - Krithika Manohar
- Department of Mechanical Engineering, University of Washington, Seattle, Washington
| | - Juan C Del Álamo
- Department of Mechanical Engineering, University of Washington, Seattle, Washington; Center for Cardiovascular Biology, University of Washington, Seattle, Washington
| | - José A López
- Division of Hematology, School of Medicine, University of Washington, Seattle, Washington; Bloodworks Research Institute, Seattle, Washington
| | - Wendy E Thomas
- Department of Bioengineering, University of Washington, Seattle, Washington
| | - Nathan J Sniadecki
- Department of Bioengineering, University of Washington, Seattle, Washington; Department of Mechanical Engineering, University of Washington, Seattle, Washington; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington; Center for Cardiovascular Biology, University of Washington, Seattle, Washington; Resuscitation Engineering Science Unit, University of Washington, Seattle, Washington; Molecular Engineering and Science Institute, University of Washington, Seattle, Washington; Department of Lab Medicine and Pathology, University of Washington, Seattle, Washington.
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9
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De Cristofaro R. Lentiviral gene therapy reverts GPIX expression and phenotype in Bernard-Soulier syndrome type C. MOLECULAR THERAPY. NUCLEIC ACIDS 2023; 33:749. [PMID: 37621411 PMCID: PMC10445095 DOI: 10.1016/j.omtn.2023.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Affiliation(s)
- Raimondo De Cristofaro
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica S. Cuore, Facoltà di Medicina e Chirurgia “Agostino Gemelli,” Roma, Italy
- Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario “A. Gemell” IRCCS, Roma, Italy
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10
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Wang Y, Li R. Specific O-glycans in the mechanosensory domain of glycoprotein Ibα are important for its stability and function. Haematologica 2023; 108:2526-2530. [PMID: 36779596 PMCID: PMC10483358 DOI: 10.3324/haematol.2022.281979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 01/30/2023] [Indexed: 02/11/2023] Open
Abstract
Not available.
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Affiliation(s)
- Yingchun Wang
- Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322
| | - Renhao Li
- Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322.
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11
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Li R. Another layer of complexity in ectodomain shedding of platelet glycoprotein Ibα. J Thromb Haemost 2023; 21:2051-2053. [PMID: 37468175 DOI: 10.1016/j.jtha.2023.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 04/07/2023] [Indexed: 07/21/2023]
Affiliation(s)
- Renhao Li
- Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA.
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12
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Amalia M, Puteri MU, Saputri FC, Sauriasari R, Widyantoro B. Platelet Glycoprotein-Ib (GPIb) May Serve as a Bridge between Type 2 Diabetes Mellitus (T2DM) and Atherosclerosis, Making It a Potential Target for Antiplatelet Agents in T2DM Patients. Life (Basel) 2023; 13:1473. [PMID: 37511848 PMCID: PMC10381765 DOI: 10.3390/life13071473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 07/30/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) is a persistent metabolic condition that contributes to the development of cardiovascular diseases. Numerous studies have provided evidence that individuals with T2DM are at a greater risk of developing cardiovascular diseases, typically two to four times more likely than those without T2DM, mainly due to an increased risk of atherosclerosis. The rupture of an atherosclerotic plaque leading to pathological thrombosis is commonly recognized as a significant factor in advancing cardiovascular diseases caused by TD2M, with platelets inducing the impact of plaque rupture in established atherosclerosis and predisposing to the primary expansion of atherosclerosis. Studies suggest that individuals with T2DM have platelets that display higher baseline activation and reactivity than those without the condition. The expression enhancement of several platelet receptors is known to regulate platelet activation signaling, including platelet glycoprotein-Ib (GPIb). Furthermore, the high expression of platelet GP1b has been reported to increase the risk of platelet adhesion, platelet-leucocyte interaction, and thrombo-inflammatory pathology. However, the study exploring the role of GP1b in promoting platelet activation-induced cardiovascular diseases in T2DM patients is still limited. Therefore, we summarize the important findings regarding pathophysiological continuity between T2DM, platelet GPIb, and atherosclerosis and highlight the potential therapy targeting GPIb as a novel antiplatelet agent for preventing further cardiovascular incidents in TD2M patients.
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Affiliation(s)
- Muttia Amalia
- Doctoral Program, Faculty of Pharmacy, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
| | - Meidi Utami Puteri
- Laboratory of Pharmacology-Toxicology, Faculty of Pharmacy, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
| | - Fadlina Chany Saputri
- Laboratory of Pharmacology-Toxicology, Faculty of Pharmacy, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
| | - Rani Sauriasari
- Faculty of Pharmacy, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
| | - Bambang Widyantoro
- National Cardiovascular Center Harapan Kita, Department of Cardiology and Vascular Medicine, Faculty of Medicine, Universitas Indonesia, Jakarta 11420, Indonesia
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13
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Legan ER, Liu Y, Arce NA, Parker ET, Lollar P, Zhang XF, Li R. Type 2B von Willebrand disease mutations differentially perturb autoinhibition of the A1 domain. Blood 2023; 141:1221-1232. [PMID: 36580664 PMCID: PMC10023833 DOI: 10.1182/blood.2022017239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 12/05/2022] [Accepted: 12/23/2022] [Indexed: 12/31/2022] Open
Abstract
Type 2B von Willebrand disease (VWD) is an inherited bleeding disorder in which a subset of point mutations in the von Willebrand factor (VWF) A1 domain and recently identified autoinhibitory module (AIM) cause spontaneous binding to glycoprotein Ibα (GPIbα) on the platelet surface. All reported type 2B VWD mutations share this enhanced binding; however, type 2B VWD manifests as variable bleeding complications and platelet levels in patients, depending on the underlying mutation. Understanding how these mutations localizing to a similar region can result in such disparate patient outcomes is essential for detailing our understanding of VWF regulatory and activation mechanisms. In this study, we produced recombinant glycosylated AIM-A1 fragments bearing type 2B VWD mutations and examined how each mutation affects the A1 domain's thermodynamic stability, conformational dynamics, and biomechanical regulation of the AIM. We found that the A1 domain with mutations associated with severe bleeding occupy a higher affinity state correlating with enhanced flexibility in the secondary GPIbα-binding sites. Conversely, mutation P1266L, associated with normal platelet levels, has similar proportions of high-affinity molecules to wild-type (WT) but shares regions of solvent accessibility with both WT and other type 2B VWD mutations. V1316M exhibited exceptional instability and solvent exposure compared with all variants. Lastly, examination of the mechanical stability of each variant revealed variable AIM unfolding. Together, these studies illustrate that the heterogeneity among type 2B VWD mutations is evident in AIM-A1 fragments.
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Affiliation(s)
- Emily R. Legan
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Emory University, Atlanta, GA
| | - Yi Liu
- Department of Bioengineering, Lehigh University, Bethlehem, PA
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA
| | - Nicholas A. Arce
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Emory University, Atlanta, GA
| | - Ernest T. Parker
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Emory University, Atlanta, GA
| | - Pete Lollar
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Emory University, Atlanta, GA
| | - X. Frank Zhang
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA
| | - Renhao Li
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Emory University, Atlanta, GA
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14
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Yang H, Chen L, Liu Y. Novel Causal Plasma Proteins for Hypothyroidism: A Large-scale Plasma Proteome Mendelian Randomization Analysis. J Clin Endocrinol Metab 2023; 108:433-442. [PMID: 36190832 DOI: 10.1210/clinem/dgac575] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 09/14/2022] [Indexed: 01/20/2023]
Abstract
CONTEXT Although several risk proteins for hypothyroidism have been reported in recent years, many more plasma proteins have not been tested. OBJECTIVE To determine potential mechanisms and novel causal plasma proteins for hypothyroidism using Mendelian randomization (MR). METHODS A large-scale plasma proteome MR analysis was conducted using protein quantitative trait loci (pQTLs) for 2297 plasma proteins. We classified pQTLs into 4 different groups. MR analyses were conducted within the 4 groups simultaneously. Significant proteins were discovered and validated in 2 different cohorts. Colocalization analysis and enrichment analysis were conducted using proteins found with MR. RESULTS Thirty-one proteins were identified in the discovery cohort. Among them, 13 were validated in the validation cohort. Nine of the 13 proteins are risk factors (ISG15, Fc receptor-like protein 2, tumor necrosis factor ligand superfamily member 14, Rab-2A, FcRL3, thrombomodulin, interferon [IFN]-lambda-1, platelet glycoprotein Ib alpha chain, IL-7RA) for hypothyroidism, whereas others are protective proteins (protein O-glucosyltransferase 1 [POGLUT1], tumor necrosis factor ligand superfamily, 3-hydroxyisobutyryl-CoA hydrolase, transferrin receptor protein 1). Among the significant proteins, POGLUT1 strongly colocalized with expression quantitative trait loci from whole blood (posterior probability of colocalization [PP4] = 0.978) and the thyroid (PP4 = 0.978). Two different trans-pQTLs (rs2111485 PP4 = 0.998; rs35103715 PP4 = 0.998) for IFN-lambda-1 strongly colocalized with hypothyroidism in different chromosomes. CONCLUSION Thirteen various proteins were identified and validated to be associated with hypothyroidism using univariable MR. We reinforced and expanded the effect of IFN on hypothyroidism. Several proteins identified in this study could explain part of the association between the coagulation system and hypothyroidism. Our study broadens the causal proteins for hypothyroidism and provides the relationships between plasma proteins and hypothyroidism. The proteins identified in this study can be used as early screening biomarkers for hypothyroidism.
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Affiliation(s)
- Hongqun Yang
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, First hospital of Jilin University, Changchun 130021, China
| | - Lanlan Chen
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, First hospital of Jilin University, Changchun 130021, China
| | - Yahui Liu
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, First hospital of Jilin University, Changchun 130021, China
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15
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Nakayama M, Goto S, Goto S. Physical Characteristics of von Willebrand Factor Binding with Platelet Glycoprotein Ibɑ Mutants at Residue 233 Causing Various Biological Functions. TH OPEN : COMPANION JOURNAL TO THROMBOSIS AND HAEMOSTASIS 2022; 6:e421-e428. [PMID: 36632284 PMCID: PMC9729063 DOI: 10.1055/a-1937-9940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 08/05/2022] [Indexed: 01/14/2023]
Abstract
Glycoprotein (GP: HIS 1 -PRO 265 ) Ibɑ is a receptor protein expressed on the surface of the platelet. Its N-terminus domain binds with the A1 domain (ASP 1269 -PRO 1472 ) of its ligand protein von Willebrand factor (VWF) and plays a unique role in platelet adhesion under blood flow conditions. Single amino acid substitutions at residue 233 from glycine (G) to alanine (A), aspartic acid (D), or valine (V) are known to cause biochemically distinct functional alterations known as equal, loss, and gain of function, respectively. However, the underlying physical characteristics of VWF binding with GPIbɑ in wild-type and the three mutants exerting different biological functions are unclear. Here, we aimed to test the hypothesis: biological characteristics of macromolecules are influenced by small changes in physical parameters. The position coordinates and velocity vectors of all atoms and water molecules constructing the wild-type and the three mutants of GPIbɑ (G233A, G233D, and G233V) bound with VWF were calculated every 2 × 10 -15 seconds using the CHARMM (Chemistry at Harvard Macromolecular Mechanics) force field for 9 × 10 -10 seconds. Six salt bridges were detected for longer than 50% of the calculation period for the wild-type model generating noncovalent binding energy of -1096 ± 137.6 kcal/mol. In contrast, only four pairs of salt bridges were observed in G233D mutant with noncovalent binding energy of -865 ± 139 kcal/mol. For G233A and G233V, there were six and five pairs of salt bridges generating -929.8 ± 88.5 and -989.9 ± 94.0 kcal/mol of noncovalent binding energy, respectively. Our molecular dynamic simulation showing a lower probability of salt bridge formation with less noncovalent binding energy in VWF binding with the biologically loss of function G233D mutant of GPIbɑ as compared with wild-type, equal function, and gain of function mutant suggests that biological functions of macromolecules such as GPIbɑ are influenced by their small changes in physical characteristics.
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Affiliation(s)
- Masamitsu Nakayama
- Department of Medicine (Cardiology), Tokai University School of Medicine, Isehara, Japan
| | - Shinichi Goto
- Department of Medicine (Cardiology), Tokai University School of Medicine, Isehara, Japan
| | - Shinya Goto
- Department of Medicine (Cardiology), Tokai University School of Medicine, Isehara, Japan,Address for correspondence Shinya Goto, MD, PhD Department of Medicine (Cardiology), Tokai University School of Medicine143 Shimokasuya, IseharaJapan
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16
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Special Issue "Advances in Thrombocytopenia". J Clin Med 2022; 11:jcm11226679. [PMID: 36431157 PMCID: PMC9692737 DOI: 10.3390/jcm11226679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 11/08/2022] [Indexed: 11/13/2022] Open
Abstract
Thrombocytopenia is a commonly encountered hematologic challenge in medicine [...].
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17
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Dib F, Quéméner A, Bayart S, Boisseau P, Babuty A, Trossaërt M, Sigaud M, Ternisien C, Drillaud N, Eveillard M, Guillet B, Béné MC, Fouassier M. Biological, clinical features and modelling of heterozygous variants of glycoprotein Ib platelet subunit alpha (GP1BA) and glycoprotein Ib platelet subunit beta (GP1BB) genes responsible for constitutional thrombocytopenia. Br J Haematol 2022; 199:744-753. [PMID: 36173017 DOI: 10.1111/bjh.18462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 08/29/2022] [Accepted: 08/31/2022] [Indexed: 11/28/2022]
Abstract
Constitutional thrombocytopenias are rare disorders, often difficult to discriminate from acquired thrombocytopenias. More than 80 genes have been described as being at the origin of these diseases. Among them, several variants of the glycoprotein Ib platelet subunit alpha (GP1BA) and glycoprotein Ib platelet subunit beta (GP1BB) genes, coding for the GpIb-IX-V glycoprotein complex, have been reported in the literature. The study reported here aimed at describing newly identified monoallelic anomalies affecting the GP1BA and GP1BB genes on a clinical, biological and molecular level. In a cohort of nine patients with macrothrombocytopenia, eight heterozygous variants of the GP1BA or GP1BB genes were identified. Five of them had never been described in the heterozygous state. Computer modelling disclosed structure/function relationships of these five variants.
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Affiliation(s)
- Fatema Dib
- Service d'Hématologie Biologique, CHU de Nantes, Nantes, France
| | - Agnès Quéméner
- Nantes Université, Inserm UMR 1307, CNRS UMR 6075, Université d'Angers, CRCI2NA, Nantes, France
| | | | - Pierre Boisseau
- Service de Génétique Médicale, CHU de Nantes, Nantes, France
| | - Antoine Babuty
- Service d'Hématologie Biologique, CHU de Nantes, Nantes, France.,CRC-MH, CHU de Nantes, Nantes, France
| | - Marc Trossaërt
- Service d'Hématologie Biologique, CHU de Nantes, Nantes, France.,CRC-MH, CHU de Nantes, Nantes, France
| | - Marianne Sigaud
- Service d'Hématologie Biologique, CHU de Nantes, Nantes, France.,CRC-MH, CHU de Nantes, Nantes, France
| | - Catherine Ternisien
- Service d'Hématologie Biologique, CHU de Nantes, Nantes, France.,CRC-MH, CHU de Nantes, Nantes, France
| | - Nicolas Drillaud
- Service d'Hématologie Biologique, CHU de Nantes, Nantes, France.,CRC-MH, CHU de Nantes, Nantes, France
| | - Marion Eveillard
- Service d'Hématologie Biologique, CHU de Nantes, Nantes, France.,Nantes Université, Inserm UMR 1307, CNRS UMR 6075, Université d'Angers, CRCI2NA, Nantes, France
| | - Benoit Guillet
- CRC-MH, CHU de Rennes, Rennes, France.,Univ Rennes, CHU Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Marie C Béné
- Service d'Hématologie Biologique, CHU de Nantes, Nantes, France.,Nantes Université, Inserm UMR 1307, CNRS UMR 6075, Université d'Angers, CRCI2NA, Nantes, France
| | - Marc Fouassier
- Service d'Hématologie Biologique, CHU de Nantes, Nantes, France.,CRC-MH, CHU de Nantes, Nantes, France
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18
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Zhang Y, Ehrlich SM, Zhu C, Du X. Signaling mechanisms of the platelet glycoprotein Ib-IX complex. Platelets 2022; 33:823-832. [PMID: 35615944 PMCID: PMC9378482 DOI: 10.1080/09537104.2022.2071852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 04/03/2022] [Accepted: 04/23/2022] [Indexed: 12/14/2022]
Abstract
The glycoprotein Ib-IX (GPIb-IX) complex mediates initial platelet adhesion to von Willebrand factor (VWF) immobilized on subendothelial matrix and endothelial surfaces, and transmits VWF binding-induced signals to stimulate platelet activation. GPIb-IX also functions as part of a mechanosensor to convert mechanical force received via VWF binding into intracellular signals, thereby greatly enhancing platelet activation. Thrombin binding to GPIb-IX initiates GPIb-IX signaling cooperatively with protease-activated receptors to synergistically stimulate the platelet response to low-dose thrombin. GPIb-IX signaling may also occur following the binding of other GPIb-IX ligands such as leukocyte integrin αMβ2 and red cell-derived semaphorin 7A, contributing to thrombo-inflammation. GPIb-IX signaling requires the interaction between the cytoplasmic domains of GPIb-IX and 14-3-3 protein and is mediated through Src family kinases, the Rho family of small GTPases, phosphoinositide 3-kinase-Akt-cGMP-mitogen-activated protein kinase, and LIM kinase 1 signaling pathways, leading to calcium mobilization, integrin activation, and granule secretion. This review summarizes the current understanding of GPIb-IX signaling.
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Affiliation(s)
- Yaping Zhang
- Department of Pharmacology and Regenerative Medicine, University of Illinois at Chicago,Chicago, Illinois, USA
| | - Samuel M Ehrlich
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Cheng Zhu
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Xiaoping Du
- Department of Pharmacology and Regenerative Medicine, University of Illinois at Chicago,Chicago, Illinois, USA
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19
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Wang L, Wang X, Guo E, Mao X, Miao S. Emerging roles of platelets in cancer biology and their potential as therapeutic targets. Front Oncol 2022; 12:939089. [PMID: 35936717 PMCID: PMC9355257 DOI: 10.3389/fonc.2022.939089] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 06/29/2022] [Indexed: 12/15/2022] Open
Abstract
The main role of platelets is to control bleeding and repair vascular damage via thrombosis. They have also been implicated to promote tumor metastasis through platelet-tumor cell interactions. Platelet-tumor cell interactions promote tumor cell survival and dissemination in blood circulation. Tumor cells are known to induce platelet activation and alter platelet RNA profiles. Liquid biopsies based on tumor-educated platelet biomarkers can detect tumors and correlate with prognosis, personalized therapy, treatment monitoring, and recurrence prediction. Platelet-based strategies for cancer prevention and tumor-targeted therapy include developing drugs that target platelet receptors, interfere with the release of platelet particles, inhibit platelet-specific enzymes, and utilize platelet-derived “nano-platelets” as a targeted drug delivery platform for tumor therapy. This review elaborates on platelet-tumor cell interactions and the molecular mechanisms and discusses future research directions for platelet-based liquid biopsy techniques and platelet-targeted anti-tumor strategies.
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Affiliation(s)
- Lei Wang
- Department of Head and Neck Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Xueying Wang
- Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Erliang Guo
- Department of Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xionghui Mao
- Department of Head and Neck Surgery, Harbin Medical University Cancer Hospital, Harbin, China
- *Correspondence: Xionghui Mao, ; Susheng Miao,
| | - Susheng Miao
- Department of Head and Neck Surgery, Harbin Medical University Cancer Hospital, Harbin, China
- *Correspondence: Xionghui Mao, ; Susheng Miao,
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20
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Chen W, Wilson MS, Wang Y, Bergmeier W, Lanza F, Li R. Fast clearance of platelets in a commonly used mouse model for GPIbα is impeded by an anti-GPIbβ antibody derivative. J Thromb Haemost 2022; 20:1451-1463. [PMID: 35305057 PMCID: PMC9133214 DOI: 10.1111/jth.15702] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/21/2022] [Accepted: 03/14/2022] [Indexed: 01/26/2023]
Abstract
BACKGROUND Glycoprotein (GP)Ibα plays a critical role in regulating platelet clearance. Recently, we identified the mechanosensory domain (MSD) in GPIbα and reported evidence to suggest that unfolding of the GPIbα MSD induces exposure of the Trigger sequence therein and subsequent GPIb-IX signaling that accelerates platelet clearance. In a commonly used transgenic mouse model, IL4R-IbαTg, where the Trigger sequence is constitutively exposed, constitutive GPIb-IX-mediated cellular signals are present. Clearance of their platelets is also significantly faster than that of wild-type mice. Previously, an anti-GPIbβ antibody RAM.1 was developed. RAM.1 inhibits GPIbα-dependent platelet signaling and activation. Further, RAM.1 also inhibits anti-GPIbα antibody-mediated filopodia formation. OBJECTIVE To investigate whether RAM.1 can ameliorate trigger sequence exposure-mediated platelet clearance. METHODS Spontaneous filopodia were measured by confocal microscopy. Other platelet signaling events were measured by flow cytometry. Endogenous platelet life span was tracked by Alexa 488-labeled anti-mouse GPIX antibody. RESULT Transfected Chinese hamster ovary cells stably expressing the same chimeric IL4R-Ibα protein complex as in IL4R-IbαTg mice also constitutively exhibit filopodia, and that such filopodia could be abolished by treatment of RAM.1. Further, transfusion of a recombinant RAM.1 derivative that is devoid of its Fc portion significantly extends the endogenous life span of IL4R-IbαTg platelets. CONCLUSION These results provide the key evidence supporting the causative link of Trigger sequence exposure to accelerated platelet clearance, and suggest that a RAM.1 derivative may be therapeutically developed to treat GPIb-IX-mediated thrombocytopenia.
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Affiliation(s)
- Wenchun Chen
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Departments of Pediatrics, Emory University School of Medicine Atlanta, GA
| | - Moriah S. Wilson
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Departments of Pediatrics, Emory University School of Medicine Atlanta, GA
| | - Yingchun Wang
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Departments of Pediatrics, Emory University School of Medicine Atlanta, GA
| | - Wolfgang Bergmeier
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Francois Lanza
- Université de Strasbourg, INSERM, BPPS UMR-S1255, Strasbourg, France
| | - Renhao Li
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Departments of Pediatrics, Emory University School of Medicine Atlanta, GA
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21
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Bendas G, Schlesinger M. The GPIb-IX complex on platelets: insight into its novel physiological functions affecting immune surveillance, hepatic thrombopoietin generation, platelet clearance and its relevance for cancer development and metastasis. Exp Hematol Oncol 2022; 11:19. [PMID: 35366951 PMCID: PMC8976409 DOI: 10.1186/s40164-022-00273-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 03/19/2022] [Indexed: 12/13/2022] Open
Abstract
The glycoprotein (GP) Ib-IX complex is a platelet receptor that mediates the initial interaction with subendothelial von Willebrand factor (VWF) causing platelet arrest at sites of vascular injury even under conditions of high shear. GPIb-IX dysfunction or deficiency is the reason for the rare but severe Bernard-Soulier syndrome (BSS), a congenital bleeding disorder. Although knowledge on GPIb-IX structure, its basic functions, ligands, and intracellular signaling cascades have been well established, several advances in GPIb-IX biology have been made in the recent years. Thus, two mechanosensitive domains and a trigger sequence in GPIb were characterized and its role as a thrombin receptor was deciphered. Furthermore, it became clear that GPIb-IX is involved in the regulation of platelet production, clearance and thrombopoietin secretion. GPIb is deemed to contribute to liver cancer development and metastasis. This review recapitulates these novel findings highlighting GPIb-IX in its multiple functions as a key for immune regulation, host defense, and liver cancer development.
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Affiliation(s)
- Gerd Bendas
- Department of Pharmacy, Rheinische Friedrich-Wilhelms-University Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Martin Schlesinger
- Department of Pharmacy, Rheinische Friedrich-Wilhelms-University Bonn, An der Immenburg 4, 53121, Bonn, Germany. .,Federal Institute for Drugs and Medical Devices (BfArM), Bonn, Germany.
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22
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Tamura N, Goto S, Yokota H, Goto S. Contributing Role of Mitochondrial Energy Metabolism on Platelet Adhesion, Activation and Thrombus Formation under Blood Flow Conditions. Platelets 2022; 33:1083-1089. [PMID: 35348041 DOI: 10.1080/09537104.2022.2046722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Platelets have an active energy metabolism mediated by mitochondria. However, the role of mitochondria in platelet adhesion, activation, and thrombus formation under blood flow conditions remains to be elucidated. Blood specimens were obtained from healthy adult volunteers. The consumption of glucose molecules by platelets was measured after 24 hours. Platelet adhesion, activation, and thrombus formation on collagen fibrils and immobilized von Willebrand factor (VWF) at a wall shear rate of 1,500 s-1 were detected by fluorescence microscopy with an ultrafast laser confocal unit in the presence or absence of mitochondrial functional inhibitors of carbonyl cyanide 4-(trifluoromethoxy) phenylhydrazone (FCCP), antimycin A, and oligomycin. Consumption of glucose molecules within the first 24 h of 4.21 × 10-15 ± 4.46 x 10-15 (n = 6) increased to 13.82 × 10-15 ± 3.46 x 10-15 (n = 4) in the presence of FCCP, 12.11 × 10-15 ± 2.33 x 10-15 (n = 4) in the presence of antimycin A, and 11.87 × 10-15 ± 3.56 x 10-15 (n = 4) in the presence of oligomycin (p < .05). These mitochondrial functional blockers did not influence both surface area coverage by platelets and the 3-dimensional size of platelet thrombi formed on the collagen fibrils. However, a rapid increase in the intracellular calcium ion concentration ([Ca2+]i) upon adhering on immobilized VWF decreased significantly from 405.5 ± 86.2 nM in control to 198.0 ± 79.2 nM in the presence of FCCP (p < .005). A similar decrease in the rapid increase in ([Ca2+]i) was observed in the presence of antimycin A and oligomycin. Mitochondrial function is necessary for platelet activation represented by a rapid increase in [Ca2+]i after platelet adhesion on VWF. However, the influence could not be detected as changes in platelet adhesion or 3-dimensional growth of platelet thrombi on collagen fibrils.
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Affiliation(s)
- Noriko Tamura
- Department of Health and Nutrition, Faculty of Health Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Shinichi Goto
- Department of Medicine (Cardiology), Tokai University School of Medicine, Isehara, Japan
| | - Hideo Yokota
- Image Processing Research Team, Center for Advanced Photonics, Riken, Wako, Japan
| | - Shinya Goto
- Department of Medicine (Cardiology), Tokai University School of Medicine, Isehara, Japan
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23
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Amini SN, Porcelijn L, Sobels A, Kartachova M, de Haas M, Zwaginga JJ, Schipperus MR. Anti-glycoprotein antibodies and sequestration pattern of indium-labeled platelets in immune thrombocytopenia. Blood Adv 2022; 6:1797-1803. [PMID: 34654052 PMCID: PMC8941471 DOI: 10.1182/bloodadvances.2021004822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 09/08/2021] [Indexed: 11/20/2022] Open
Abstract
Antiglycoprotein (anti-GP) antibodies play an important role in the pathophysiology of immune thrombocytopenia (ITP). The sequestration pattern of platelets in the spleen and liver can be studied with 111In-labeled autologous platelet scans. No studies have investigated the role of anti-GP antibodies in sequestration patterns in ITP patients. In this study, we examined the association between antibodies and (1) platelet sequestration site and (2) clearance rate of platelets. All ITP patients receiving an 111In-labeled autologous platelet study between 2014 and 2018 were included. Antibodies were measured using the direct MAIPA method to determine the presence and titer of anti-GPIIb/IIIa, anti-GPIb/IX, and anti-GPV antibodies. Multivariate regression models were used to study the association between anti-GP antibodies, sequestration site, and clearance rate. Seventy-four patients were included, with a mean age of 36 years. Forty-seven percent of the patients showed a predominantly splenic sequestration pattern, 29% mixed, and 25% a hepatic pattern. In 53% of the patients, anti-GP antibodies were detected. Regression models showed a significant association between splenic sequestration and GPV autoantibodies. Furthermore, in patients where antibodies were present, the clearance rate was higher in patients with a splenic sequestration. Anti-GPV antibodies are associated with a splenic sequestration pattern in ITP patients. These associations provide insight into the possible pathophysiological mechanisms of ITP, which may lead to better detection and treatment of this partly idiopathic and prevalent disease.
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Affiliation(s)
- Sufia N Amini
- Department of Hematology, Hagaziekenhuis, The Hague, The Netherlands
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Annemieke Sobels
- Department of Hospital Pharmacy, Hagaziekenhuis, The Hague, The Netherlands
| | - Marina Kartachova
- Department of Nuclear Medicine, Hagaziekenhuis, The Hague, The Netherlands; and
| | | | - Jaap Jan Zwaginga
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | - Martin R Schipperus
- Department of Hematology, University Medical Center Groningen, The Netherlands
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24
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Leinøe E, Brøns N, Rasmussen AØ, Gabrielaite M, Zaninetti C, Palankar R, Zetterberg E, Rosthøj S, Ostrowski SR, Rossing M. The Copenhagen founder variant GP1BA c.58T>G is the most frequent cause of inherited thrombocytopenia in Denmark. J Thromb Haemost 2021; 19:2884-2892. [PMID: 34333846 PMCID: PMC9292710 DOI: 10.1111/jth.15479] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 07/20/2021] [Accepted: 07/29/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND The classic Bernard-Soulier syndrome (BSS) is a rare inherited thrombocytopenia (IT) associated with severe thrombocytopenia, giant platelets, and bleeding tendency caused by homozygous or compound heterozygous variants in GP1BA, GP1BB, or GP9. Monoallelic BSS (mBSS) associated with mild asymptomatic macrothrombocytopenia caused by heterozygous variants in GP1BA or GP1BB may be a frequent cause of mild IT. OBJECTIVE We aimed to examine the frequency of mBSS in a consecutive cohort of patients with IT and to characterize the geno- and phenotype of mBSS probands and their family members. Additionally, we set out to examine if thrombopoietin (TPO) levels differ in mBSS patients. PATIENTS/METHODS We screened 106 patients suspected of IT using whole exome- or whole genome sequencing and performed co-segregation analyses of mBSS families. All probands and family members were phenotypically characterized. Founder mutation analysis was carried out by certifying that the probands were unrelated and the region around the variant was shared by all patients. TPO was measured by solid phase sandwich ELISA. RESULTS We diagnosed 14 patients (13%) with mBSS associated with heterozygous variants in GP1BA and GP1BB. Six unrelated probands carried a heterozygous variant in GP1BA (c.58T>G, p.Cys20Gly) and shared a 2.0 Mb region on chromosome 17, confirming that it is a founder variant. No discrepancy of TPO levels between mBSS patients and wild-type family members (P > .05) were identified. CONCLUSION We conclude that the most frequent form of IT in Denmark is mBSS caused by the Copenhagen founder variant.
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Affiliation(s)
- Eva Leinøe
- Department of HematologyCopenhagen University HospitalRigshospitaletCopenhagenDenmark
- Center for Genomic MedicineCopenhagen University HospitalRigshospitaletCopenhagenDenmark
| | - Nanna Brøns
- Department of HematologyCopenhagen University HospitalRigshospitaletCopenhagenDenmark
| | | | - Migle Gabrielaite
- Center for Genomic MedicineCopenhagen University HospitalRigshospitaletCopenhagenDenmark
| | - Carlo Zaninetti
- Department of Immunology and Transfusion MedicineUniversity Medicine GreifswaldGreifswaldGermany
| | - Raghavendra Palankar
- Department of Immunology and Transfusion MedicineUniversity Medicine GreifswaldGreifswaldGermany
| | | | - Steen Rosthøj
- Department of PediatricsAalborg University HospitalAalborgDenmark
| | - Sisse Rye Ostrowski
- Department of Clinical ImmunologyCopenhagen University HospitalRigshospitaletCopenhagenDenmark
| | - Maria Rossing
- Center for Genomic MedicineCopenhagen University HospitalRigshospitaletCopenhagenDenmark
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Liu Y, Zhang Y, Ding Y, Zhuang R. Platelet-mediated tumor metastasis mechanism and the role of cell adhesion molecules. Crit Rev Oncol Hematol 2021; 167:103502. [PMID: 34662726 DOI: 10.1016/j.critrevonc.2021.103502] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 09/17/2021] [Accepted: 10/10/2021] [Indexed: 12/12/2022] Open
Abstract
Mounting evidence suggests that platelets play an essential role in cancer metastasis. The interactions between platelets and circulating tumor cells (CTCs) promote cancer metastasis. CTCs induce platelet activation and aggregation, and activated platelets gather and protect CTCs from shear stress and natural killer cells. Finally, platelets stimulate CTC anoikis resistance, epithelial-to-mesenchymal transition, angiogenesis, extravasation, and eventually, metastasis. Cell adhesion molecules (CAMs) have been identified as active players during the interaction of CTCs with platelets, but the specific mechanism underlying the contribution of platelet-associated CAMs to CTC metastasis remains unclear. In this review, we introduce the mechanism of platelet-related tumor metastasis and particularly focus on the role of CAMs in it.
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Affiliation(s)
- Yitian Liu
- Department of Immunology, the Fourth Military Medical University, #169 Changlexilu Road, Xi'an, Shaanxi, 710032, China; Orthopedic Department of Tangdu Hospital, the Fourth Military Medical University, #1 Xinsi Road, Xi'an, Shaanxi, 710032, China
| | - Yuan Zhang
- Institute of Medical Research, Northwestern Polytechnical University, #127 Youyixilu Road, Xi'an, Shaanxi, 710072, China
| | - Yong Ding
- Orthopedic Department of Tangdu Hospital, the Fourth Military Medical University, #1 Xinsi Road, Xi'an, Shaanxi, 710032, China
| | - Ran Zhuang
- Department of Immunology, the Fourth Military Medical University, #169 Changlexilu Road, Xi'an, Shaanxi, 710032, China; Institute of Medical Research, Northwestern Polytechnical University, #127 Youyixilu Road, Xi'an, Shaanxi, 710072, China.
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A p.Arg127Gln variant in GPIbα LRR5 allosterically enhances affinity for VWF: a novel form of platelet-type VWD. Blood Adv 2021; 6:2236-2246. [PMID: 34619770 PMCID: PMC9006298 DOI: 10.1182/bloodadvances.2021005463] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 08/30/2021] [Indexed: 11/29/2022] Open
Abstract
We identified a novel GP1BA variant in the LRR5 domain of GPIbα (p.Arg127Gln) in a patient with a mild PT-VWD phenotype. GOF variants in the LRR of GPIbα alter the dynamics of the C-terminal disulfide loop generating a conformation with high affinity for VWF.
Gain-of-function (GOF) variants in GP1BA cause platelet-type von Willebrand disease (PT-VWD), a rare inherited autosomal dominant bleeding disorder characterized by enhanced platelet GPIbα to von Willebrand factor (VWF) interaction, and thrombocytopenia. To date, only 6 variants causing PT-VWD have been described, 5 in the C-terminal disulfide loop of the VWF-binding domain of GPIbα and 1 in the macroglycopeptide. GOF GP1BA variants generate a high-affinity conformation of the C-terminal disulfide loop with a consequent allosteric conformational change on another region of GPIbα, the leucine-rich-repeat (LRR) domain. We identified a novel GP1BA variant (p.Arg127Gln) affecting the LRR5 domain of GPIbα in a boy with easy bruising and laboratory test results suggestive of PT-VWD. We thus aimed to investigate the impact of the p.Arg127Gln variant on GPIbα affinity for VWF and GPIbα structure. Chinese hamster ovary cells expressing p.Arg127Gln GPIbα showed increased binding of VWF induced by ristocetin and enhanced tethering on immobilized VWF as compared with cells expressing wild-type GPIbα. Surface plasmon resonance confirmed that p.Arg127Gln enhances the binding affinity of GPIbα for VWF. Hydrogen‐deuterium exchange mass spectrometry showed that p.Arg127Gln of LRR, while having little effect on the dynamics of the LRR locally, enhances the conformational dynamics of the GPIbα C-terminal disulfide loop structure. Our data demonstrate for the first time that GOF variants outside the GPIbα C-terminal disulfide loop may be pathogenic and that aminoacidic changes in the LRR may cause allosterically conformational changes in the C-terminal disulfide loop of GPIbα, inducing a conformation with high affinity for VWF.
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A Novel Mutation in GP1BB Reveals the Role of the Cytoplasmic Domain of GPIbβ in the Pathophysiology of Bernard-Soulier Syndrome and GPIb-IX Complex Assembly. Int J Mol Sci 2021; 22:ijms221910190. [PMID: 34638529 PMCID: PMC8508601 DOI: 10.3390/ijms221910190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/14/2021] [Accepted: 09/17/2021] [Indexed: 12/24/2022] Open
Abstract
Bernard-Soulier syndrome (BSS) is an autosomal-recessive bleeding disorder caused by biallelic variants in the GP1BA, GP1BB, and GP9 genes encoding the subunits GPIbα, GPIbβ, and GPIX of the GPIb-IX complex. Pathogenic variants usually affect the extracellular or transmembrane domains of the receptor subunits. We investigated a family with BSS caused by the homozygous c.528_550del (p.Arg177Serfs*124) variant in GP1BB, which is the first mutation ever identified that affects the cytoplasmic domain of GPIbβ. The loss of the intracytoplasmic tail of GPIbβ results in a mild form of BSS, characterized by only a moderate reduction of the GPIb-IX complex expression and mild or absent bleeding tendency. The variant induces a decrease of the total platelet expression of GPIbβ; however, all of the mutant subunit expressed in platelets is correctly assembled into the GPIb-IX complex in the plasma membrane, indicating that the cytoplasmic domain of GPIbβ is not involved in assembly and trafficking of the GPIb-IX receptor. Finally, the c.528_550del mutation exerts a dominant effect and causes mild macrothrombocytopenia in heterozygous individuals, as also demonstrated by the investigation of a second unrelated pedigree. The study of this novel GP1BB variant provides new information on pathophysiology of BSS and the assembly mechanisms of the GPIb-IX receptor.
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Quach ME, Chen W, Wang Y, Deckmyn H, Lanza F, Nieswandt B, Li R. Differential regulation of the platelet GPIb-IX complex by anti-GPIbβ antibodies. J Thromb Haemost 2021; 19:2044-2055. [PMID: 33915031 PMCID: PMC8324530 DOI: 10.1111/jth.15359] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 04/14/2021] [Accepted: 04/26/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Platelets' initial recognition of endothelial damage proceeds through the interaction between collagen, plasma von Willebrand factor (VWF), and the platelet glycoprotein (GP)Ib-IX complex (CD42). The GPIb-IX complex consists of one GPIbα, one GPIX, and two GPIbβ subunits. Once platelets are immobilized to the subendothelial matrix, shear generated by blood flow unfolds a membrane-proximal mechanosensory domain (MSD) in GPIbα, exposing a conserved trigger sequence and activating the receptor. Currently, GPIbα appears to solely facilitate ligand-induced activation because it contains both the MSD and the binding sites for all known ligands to GPIb-IX. Despite being positioned directly adjacent to the MSD, the roles of GPIbβ and GPIX in signal transduction remain murky. OBJECTIVES To characterize a novel rat monoclonal antibody 3G6 that binds GPIbβ. METHODS Effects of 3G6 on activation of GPIb-IX are characterized in platelets and Chinese hamster ovary cells expressing GPIb-IX (CHO-Ib-IX) and compared with those of an inhibitory anti-GPIbβ antibody, RAM.1. RESULTS Both RAM.1 and 3G6 bind to purified GPIbβ and GPIb-IX with high affinity. 3G6 potentiates GPIb-IX-associated filopodia formation in platelets or CHO-Ib-IX when they adhere VWF or antibodies against the ligand-binding domain (LBD) of GPIbα. Pretreatment with 3G6 also increased anti-LBD antibody-induced GPIb-IX activation. Conversely, RAM.1 inhibits nearly all GPIb-IX-related signaling in platelets and CHO-Ib-IX cells. CONCLUSIONS These data represent the first report of a positive modulator of GPIb-IX activation. The divergent modulatory effects of 3G6 and RAM.1, both targeting GPIbβ, strongly suggest that changes in the conformation of GPIbβ underlie outside-in activation via GPIb-IX.
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Affiliation(s)
- M. Edward Quach
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322
| | - Wenchun Chen
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322
| | - Yingchun Wang
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322
| | - Hans Deckmyn
- Laboratory for Thrombosis Research, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Francois Lanza
- Université de Strasbourg, INSERM, BPPS UMR-S1255, Strasbourg, France
| | - Bernhard Nieswandt
- Rudolf Virchow Center, Julius Maximilian University of Wurzburg, Würzburg, Germany
| | - Renhao Li
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322
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Obermann WMJ, Brockhaus K, Eble JA. Platelets, Constant and Cooperative Companions of Sessile and Disseminating Tumor Cells, Crucially Contribute to the Tumor Microenvironment. Front Cell Dev Biol 2021; 9:674553. [PMID: 33937274 PMCID: PMC8085416 DOI: 10.3389/fcell.2021.674553] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 03/29/2021] [Indexed: 12/12/2022] Open
Abstract
Although platelets and the coagulation factors are components of the blood system, they become part of and contribute to the tumor microenvironment (TME) not only within a solid tumor mass, but also within a hematogenous micrometastasis on its way through the blood stream to the metastatic niche. The latter basically consists of blood-borne cancer cells which are in close association with platelets. At the site of the primary tumor, the blood components reach the TME via leaky blood vessels, whose permeability is increased by tumor-secreted growth factors, by incomplete angiogenic sprouts or by vasculogenic mimicry (VM) vessels. As a consequence, platelets reach the primary tumor via several cell adhesion molecules (CAMs). Moreover, clotting factor VII from the blood associates with tissue factor (TF) that is abundantly expressed on cancer cells. This extrinsic tenase complex turns on the coagulation cascade, which encompasses the activation of thrombin and conversion of soluble fibrinogen into insoluble fibrin. The presence of platelets and their release of growth factors, as well as fibrin deposition changes the TME of a solid tumor mass substantially, thereby promoting tumor progression. Disseminating cancer cells that circulate in the blood stream also recruit platelets, primarily by direct cell-cell interactions via different receptor-counterreceptor pairs and indirectly by fibrin, which bridges the two cell types via different integrin receptors. These tumor cell-platelet aggregates are hematogenous micrometastases, in which platelets and fibrin constitute a particular TME in favor of the cancer cells. Even at the distant site of settlement, the accompanying platelets help the tumor cell to attach and to grow into metastases. Understanding the close liaison of cancer cells with platelets and coagulation factors that change the TME during tumor progression and spreading will help to curb different steps of the metastatic cascade and may help to reduce tumor-induced thrombosis.
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Affiliation(s)
| | | | - Johannes A. Eble
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Münster, Germany
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