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Selvadurai MV, Brazilek RJ, Moon MJ, Rinckel J, Eckly A, Gachet C, Meikle PJ, Nandurkar HH, Nesbitt WS, Hamilton JR. The
PI
3‐kinase
PI
3
KC
2α regulates mouse platelet membrane structure and function independently of membrane lipid composition. FEBS Lett 2018; 593:88-96. [DOI: 10.1002/1873-3468.13295] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 11/07/2018] [Indexed: 01/01/2023]
Affiliation(s)
| | - Rose J. Brazilek
- Australian Centre for Blood Diseases Monash University Melbourne Australia
| | - Mitchell J. Moon
- Australian Centre for Blood Diseases Monash University Melbourne Australia
| | | | - Anita Eckly
- INSERM EFS GEST BPPS UMR_S1225 FMTS Université de Strasbourg France
| | - Christian Gachet
- INSERM EFS GEST BPPS UMR_S1225 FMTS Université de Strasbourg France
| | - Peter J. Meikle
- Metabolomics Laboratory Baker IDI Heart and Diabetes Institute Melbourne Australia
| | | | - Warwick S. Nesbitt
- Australian Centre for Blood Diseases Monash University Melbourne Australia
- Microplatforms Research Group School of Engineering RMIT University Melbourne Australia
| | - Justin R. Hamilton
- Australian Centre for Blood Diseases Monash University Melbourne Australia
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2
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Selvadurai MV, Hamilton JR. Structure and function of the open canalicular system – the platelet’s specialized internal membrane network. Platelets 2018; 29:319-325. [DOI: 10.1080/09537104.2018.1431388] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Maria V. Selvadurai
- Australian Centre for Blood Diseases, Monash University, Melbourne, Australia
| | - Justin R. Hamilton
- Australian Centre for Blood Diseases, Monash University, Melbourne, Australia
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3
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Ahmadi Z, Perdomo J, Wong R, Chong BH. Drug-induced immune thrombocytopenia: Mapping of the drug binding site to the membrane-proximal region of platelet GPIX. Platelets 2017; 30:251-255. [PMID: 29286872 DOI: 10.1080/09537104.2017.1419556] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Drug-induced Immune thrombocytopenia (DIT) is a common complication of several medications, including commonly used antibiotics. The most widely studied DIT is caused by quinine. In DIT, antibodies predominantly bind to the platelet membrane glycoprotein (GP) IX in a drug-dependent fashion resulting in increased platelet clearance. Binding of the sensitizing drug, such as quinine, to GPIX has been proposed but is yet to be established. This work demonstrates that quinine is retained specifically by human GPIX. Quinine binding was first analyzed in wild-type mouse platelets and in transgenic mouse platelet expressing human GPIX using high performance liquid chromatography. Binding of quinine to GPIX was then measured in Chinese hamster ovary (CHO) cells expressing a combination of wild type, human or mouse, three human/mouse chimeric constructs and six mutant GPIX proteins. Quinine was retained by human GPIX. No detectable absorption was observed with mouse GPIX or human GPIbα. The quinine binding site was mapped to residues 110-115 of human GPIX suggesting that quinine interacts with specific residues of the GP. These findings provide further insights into the molecular mechanisms of DIT.
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Affiliation(s)
- Zohra Ahmadi
- b Haematology Department , St George Hospital , Kogarah , NSW , Australia
| | - Jose Perdomo
- a Haematology Research Unit, St George and Sutherland Clinical School , University of New South Wales, Research and Education Centre , Kogarah , NSW , Australia
| | - Rose Wong
- b Haematology Department , St George Hospital , Kogarah , NSW , Australia
| | - Beng H Chong
- a Haematology Research Unit, St George and Sutherland Clinical School , University of New South Wales, Research and Education Centre , Kogarah , NSW , Australia.,b Haematology Department , St George Hospital , Kogarah , NSW , Australia
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4
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Kowata S, Isogai S, Murai K, Ito S, Tohyama K, Ema M, Hitomi J, Ishida Y. Platelet demand modulates the type of intravascular protrusion of megakaryocytes in bone marrow. Thromb Haemost 2017; 112:743-56. [DOI: 10.1160/th14-02-0123] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 04/19/2014] [Indexed: 12/16/2022]
Abstract
SummaryMegakaryocytes (MKs) generate platelets via intravascular protrusions termed proplatelets, which are tandem arrays of platelet-sized swellings with a beaded appearance. However, it remains unclear whether all intravascular protrusions in fact become proplatelets, and whether MKs generate platelets without forming proplatelets. Here, we visualised the sequential phases of intravascular MK protrusions and fragments in living mouse bone marrow (BM), using intravital microscopy, and examined their ultrastructure. The formation of intravascular protrusions was observed to be a highly dynamic process, in which the size and shape of the protrusions changed sequentially prior to the release of platelet progenitors. Among these intravascular protrusions, immature thick protrusions were distinguished from proplatelets by their size and the dynamic morphogenesis seen by time-lapse observation. In ultrastructural analyses, the thick protrusions and their fragments were characterised by a peripheral zone, abundant endoplasmic reticulum and demarcation membrane system, and random microtubule arrays. Proplatelets were predominant among BM sinusoids in the physiological state; however, during an acute thrombocytopenic period, thick protrusions increased markedly in the sinusoids. These results strongly suggested that BM MKs form and release two types of platelet progenitors via distinct intravascular protrusions, and that platelet demand modulates the type of intravascular protrusion that is formed in vivo.
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Faggio C, Sureda A, Morabito S, Sanches-Silva A, Mocan A, Nabavi SF, Nabavi SM. Flavonoids and platelet aggregation: A brief review. Eur J Pharmacol 2017; 807:91-101. [DOI: 10.1016/j.ejphar.2017.04.009] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 04/04/2017] [Accepted: 04/10/2017] [Indexed: 12/11/2022]
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6
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VAN ELSLAND D, BOS E, PAWLAK J, OVERKLEEFT H, KOSTER A, VAN KASTEREN S. Correlative light and electron microscopy reveals discrepancy between gold and fluorescence labelling. J Microsc 2017; 267:309-317. [DOI: 10.1111/jmi.12567] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 02/17/2017] [Accepted: 03/27/2017] [Indexed: 10/19/2022]
Affiliation(s)
- D.M. VAN ELSLAND
- Division of Bio-organic Synthesis, Leiden Institute of Chemistry, Gorlaeus Laboratories; Leiden University; Leiden The Netherlands
- Institute for Chemical Immunology, Gorlaeus Laboratories; Leiden University; Leiden The Netherlands
| | - E. BOS
- Department of Molecular Cell Biology, Section Electron Microscopy; Leiden University Medical Center; Leiden The Netherlands
| | - J.B. PAWLAK
- Division of Bio-organic Synthesis, Leiden Institute of Chemistry, Gorlaeus Laboratories; Leiden University; Leiden The Netherlands
- Institute for Chemical Immunology, Gorlaeus Laboratories; Leiden University; Leiden The Netherlands
| | - H.S. OVERKLEEFT
- Division of Bio-organic Synthesis, Leiden Institute of Chemistry, Gorlaeus Laboratories; Leiden University; Leiden The Netherlands
- Institute for Chemical Immunology, Gorlaeus Laboratories; Leiden University; Leiden The Netherlands
| | - A.J. KOSTER
- Department of Molecular Cell Biology, Section Electron Microscopy; Leiden University Medical Center; Leiden The Netherlands
| | - S.I. VAN KASTEREN
- Division of Bio-organic Synthesis, Leiden Institute of Chemistry, Gorlaeus Laboratories; Leiden University; Leiden The Netherlands
- Institute for Chemical Immunology, Gorlaeus Laboratories; Leiden University; Leiden The Netherlands
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7
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Abstract
Platelets are anucleate blood cells, long known to be critically involved in hemostasis and thrombosis. In addition to their role in blood clots, increasing evidence reveals significant roles for platelets in inflammation and immunity. However, the notion that platelets represent immune cells is not broadly recognized in the field of Physiology. This article reviews the role of platelets in inflammation and immune responses, and highlights their interactions with other immune cells, including examples of major functional consequences of these interactions.
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Affiliation(s)
- Fong W Lam
- Center for Translational Research on Inflammatory Diseases (CTRID), Michael E. DeBakey VA Medical Center, Houston, Texas, USA
- Department of Pediatrics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas, USA
| | - K Vinod Vijayan
- Center for Translational Research on Inflammatory Diseases (CTRID), Michael E. DeBakey VA Medical Center, Houston, Texas, USA
- Department of Medicine, Baylor College of Medicine, One Baylor Plaza, Houston, Texas, USA
- Department of Pediatrics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas, USA
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas, USA
| | - Rolando E Rumbaut
- Center for Translational Research on Inflammatory Diseases (CTRID), Michael E. DeBakey VA Medical Center, Houston, Texas, USA
- Department of Medicine, Baylor College of Medicine, One Baylor Plaza, Houston, Texas, USA
- Department of Pediatrics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas, USA
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8
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Mountford JK, Petitjean C, Putra HWK, McCafferty JA, Setiabakti NM, Lee H, Tønnesen LL, McFadyen JD, Schoenwaelder SM, Eckly A, Gachet C, Ellis S, Voss AK, Dickins RA, Hamilton JR, Jackson SP. The class II PI 3-kinase, PI3KC2α, links platelet internal membrane structure to shear-dependent adhesive function. Nat Commun 2015; 6:6535. [PMID: 25779105 DOI: 10.1038/ncomms7535] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 02/05/2015] [Indexed: 12/29/2022] Open
Abstract
PI3KC2α is a broadly expressed lipid kinase with critical functions during embryonic development but poorly defined roles in adult physiology. Here we utilize multiple mouse genetic models to uncover a role for PI3KC2α in regulating the internal membrane reserve structure of megakaryocytes (demarcation membrane system) and platelets (open canalicular system) that results in dysregulated platelet adhesion under haemodynamic shear stress. Structural alterations in the platelet internal membrane lead to enhanced membrane tether formation that is associated with accelerated, yet highly unstable, thrombus formation in vitro and in vivo. Notably, agonist-induced 3-phosphorylated phosphoinositide production and cellular activation are normal in PI3KC2α-deficient platelets. These findings demonstrate an important role for PI3KC2α in regulating shear-dependent platelet adhesion via regulation of membrane structure, rather than acute signalling. These studies provide a link between the open canalicular system and platelet adhesive function that has relevance to the primary haemostatic and prothrombotic function of platelets.
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Affiliation(s)
- Jessica K Mountford
- Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia
| | - Claire Petitjean
- Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia
| | - Harun W Kusuma Putra
- Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia
| | - Jonathan A McCafferty
- Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia
| | - Natasha M Setiabakti
- Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia
| | - Hannah Lee
- Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia
| | - Lotte L Tønnesen
- Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia
| | - James D McFadyen
- Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia
| | - Simone M Schoenwaelder
- 1] Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia [2] The Heart Research Institute and Charles Perkins Centre, The University of Sydney, Newtown 2050, Australia
| | - Anita Eckly
- Unité mixte de recherche S949 Institut National de la Santé et de la Recherche Médicale, Université de Strasbourg, Etablissement Français du Sang-Alsace 67000, Strasbourg, France
| | - Christian Gachet
- Unité mixte de recherche S949 Institut National de la Santé et de la Recherche Médicale, Université de Strasbourg, Etablissement Français du Sang-Alsace 67000, Strasbourg, France
| | - Sarah Ellis
- Sir Peter MacCallum Department of Oncology, Peter MacCallum Cancer Centre and The University of Melbourne, Melbourne, Victoria 3052, Australia
| | - Anne K Voss
- 1] Walter and Eliza Hall Institute of Medical Research, Melbourne, Victoria 3052, Australia [2] Department of Medical Biology, University of Melbourne, Melbourne, Victoria 3052, Australia
| | - Ross A Dickins
- 1] Walter and Eliza Hall Institute of Medical Research, Melbourne, Victoria 3052, Australia [2] Department of Medical Biology, University of Melbourne, Melbourne, Victoria 3052, Australia
| | - Justin R Hamilton
- Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia
| | - Shaun P Jackson
- 1] Australian Centre for Blood Diseases, Monash University, Level 6, 89 Commercial Road, Melbourne, Victoria 3004, Australia [2] The Heart Research Institute and Charles Perkins Centre, The University of Sydney, Newtown 2050, Australia [3] Department of Molecular and Experimental Medicine, The Scripps Research Institute, San Diego, CA 92037, USA
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9
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Sandgren P, Diedrich B. Pathogen inactivation of double-dose buffy-coat platelet concentrates photochemically treated with amotosalen and UVA light: preservation ofin vitrofunction. Vox Sang 2014; 108:340-9. [DOI: 10.1111/vox.12232] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 10/16/2014] [Accepted: 11/13/2014] [Indexed: 01/08/2023]
Affiliation(s)
- P. Sandgren
- Department of Clinical Immunology and Transfusion Medicine; Karolinska University Hospital and Karolinska Institutet; Stockholm Sweden
| | - B. Diedrich
- Department of Clinical Immunology and Transfusion Medicine; Karolinska University Hospital and Karolinska Institutet; Stockholm Sweden
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10
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Aspirin: pharmacology and clinical applications. THROMBOSIS 2011; 2012:173124. [PMID: 22195279 PMCID: PMC3236360 DOI: 10.1155/2012/173124] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 10/03/2011] [Indexed: 12/21/2022]
Abstract
Antiplatelet therapy has been documented to reduce risks of cardiovascular disease after acute myocardial infarction, coronary artery bypass graft, and in chronic atrial fibrillation patients, amongst other risk factors. Conventional management of thrombosis-based disorders includes the use of heparin, oral anticoagulants, and the preferred antiplatelet agent aspirin. Interestingly, aspirin was not intended to be used as an antiplatelet agent; rather, after being repurposed, it has become one of the most widely prescribed antithrombotic drugs. To this end, there have been several milestones in the development of antiplatelet agents in the last few decades, such as adenosine diphosphate receptor inhibitors, phosphodiesterase inhibitors, and GPIIb/IIIa inhibitors. However, given some of the limitations of these therapies, aspirin continues to play a major role in the management of thrombotic and cardiovascular disorders and is expected to do so for years to come.
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Reininger AJ, Heijnen HFG, Schumann H, Specht HM, Schramm W, Ruggeri ZM. Mechanism of platelet adhesion to von Willebrand factor and microparticle formation under high shear stress. Blood 2006; 107:3537-45. [PMID: 16449527 PMCID: PMC1895770 DOI: 10.1182/blood-2005-02-0618] [Citation(s) in RCA: 219] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
We describe here the mechanism of platelet adhesion to immobilized von Willebrand factor (VWF) and subsequent formation of platelet-derived microparticles mediated by glycoprotein Ibalpha (GPIbalpha) under high shear stress. As visualized in whole blood perfused in a flow chamber, platelet attachment to VWF involved one or few membrane areas of 0.05 to 0.1 microm(2) that formed discrete adhesion points (DAPs) capable of resisting force in excess of 160 pN. Under the influence of hydrodynamic drag, membrane tethers developed between the moving platelet body and DAPs firmly adherent to immobilized VWF. Continued stretching eventually caused the separation of many such tethers, leaving on the surface tube-shaped or spherical microparticles with a diameter as low as 50 to 100 nm. Adhesion receptors (GPIbalpha, alphaIIbbeta3) and phosphatidylserine were expressed on the surface of these microparticles, which were procoagulant. Shearing platelet-rich plasma at the rate of 10,000 s(-1) in a cone-and-plate viscosimeter increased microparticle counts up to 55-fold above baseline. Blocking the GPIb-VWF interaction abolished microparticle generation in both experimental conditions. Thus, a biomechanical process mediated by GPIbalpha-VWF bonds in rapidly flowing blood may not only initiate platelet arrest onto reactive vascular surfaces but also generate procoagulant microparticles that further enhance thrombus formation.
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Affiliation(s)
- Armin J Reininger
- Department of Transfusion Medicine and Hemostaseology, University Clinic Munich, Ziemssenstr. 1, 80336 Munich, Germany.
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Han Y, Nurden A, Combrié R, Pasquet JM. Redistribution of glycoprotein Ib within platelets in response to protease-activated receptors 1 and 4: roles of cytoskeleton and calcium. J Thromb Haemost 2003; 1:2206-15. [PMID: 14521606 DOI: 10.1046/j.1538-7836.2003.00436.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Thrombin activates human platelets by hydrolyzing the protease-activated receptors PAR-1 and PAR-4, exposing new N-terminal sequences which act as tethered ligands, and binding to glycoprotein (GP) Ib, whose surface accessibility transiently decreases when platelets are stimulated by the enzyme. In an attempt to better understand this latter process, we used the peptides SFLLRNPNDKYEPF (PAR-1-AP or TRAP) and AYPGKF (PAR-4-AP) to study whether hydrolysis of both PAR receptors leads to GPIb redistribution. Both peptides induced surface clearance of GPIb with a maximum at 2 min and 5 min for PAR-1-AP and PAR-4-AP, respectively, followed by a slow return to the surface with levels normalizing between 30 and 60 min. Translocation was associated with the formation of clusters of GPIb as revealed by fluorescence microscopy. This transient redistribution of GPIb was blocked by cytochalasin D and in large part by the membrane permeable Ca2+ chelator, BAPTA. The inhibitor of phosphatidylinositol 3-kinase and myosin light chain kinase, wortmannin, did not significantly modify internalization of GPIb, although its return to the surface was delayed for PAR-1-AP. PAR receptor-mediated association of GPIb to the insoluble cytoskeleton was blocked by cytochalasin D, while BAPTA alone increased and stabilized the presence of GPIb. Globally, immunoprecipitation experiments and analysis of the cytoskeleton confirmed that GPIb translocation is powered by a contractile mechanism involving Ca2+ mobilization, actin polymerization, and myosin incorporation into the cytoskeleton and that both PAR-1 and PAR-4 can activate this process.
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Affiliation(s)
- Y Han
- UMR 5533 CNRS, Hôpital Cardiologique du Haut-Lévêque, Avenue Magellan, Pessac, France
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Olas B, Lundell K, Holmsen H, Fukami MH. Biochemical properties of platelet microparticle membranes formed during exocytosis resemble organelles more than plasma membrane. FEBS Lett 2002; 525:29-32. [PMID: 12163156 DOI: 10.1016/s0014-5793(02)03060-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Studies of [3H]glycerol turnover in phosphatidylcholine (PC) in platelets revealed two metabolic pools, a 'low turnover PC' in collagen-induced microparticles with specific radioactivity only 10% of that found in the 'high turnover PC' of bulk platelet PC. Isolated organelle fractions of [3H]glycerol-labelled platelets contained [3H]PC with specific radioactivities about 20% of that in membrane fractions. These results together with studies on distribution of concanavalin A-FITC and GPlb, a plasma membrane receptor, indicate that microparticles formed during exocytosis are not simple vesiculations of plasma membrane, but they seem rather to originate from a relatively metabolically static membrane pool not accessible to extracellular reagents.
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Affiliation(s)
- Beata Olas
- Department of Biochemistry and Molecular Biology, University of Bergen, Arstadveien 19, 5009, Bergen, Norway
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