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van Geffen JP, Swieringa F, van Kuijk K, Tullemans BME, Solari FA, Peng B, Clemetson KJ, Farndale RW, Dubois LJ, Sickmann A, Zahedi RP, Ahrends R, Biessen EAL, Sluimer JC, Heemskerk JWM, Kuijpers MJE. Mild hyperlipidemia in mice aggravates platelet responsiveness in thrombus formation and exploration of platelet proteome and lipidome. Sci Rep 2020; 10:21407. [PMID: 33293576 PMCID: PMC7722935 DOI: 10.1038/s41598-020-78522-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 11/23/2020] [Indexed: 01/21/2023] Open
Abstract
Hyperlipidemia is a well-established risk factor for cardiovascular diseases. Millions of people worldwide display mildly elevated levels of plasma lipids and cholesterol linked to diet and life-style. While the prothrombotic risk of severe hyperlipidemia has been established, the effects of moderate hyperlipidemia are less clear. Here, we studied platelet activation and arterial thrombus formation in Apoe-/- and Ldlr-/- mice fed a normal chow diet, resulting in mildly increased plasma cholesterol. In blood from both knockout mice, collagen-dependent thrombus and fibrin formation under flow were enhanced. These effects did not increase in severe hyperlipidemic blood from aged mice and upon feeding a high-fat diet (Apoe-/- mice). Bone marrow from wild-type or Ldlr-/- mice was transplanted into irradiated Ldlr-/- recipients. Markedly, thrombus formation was enhanced in blood from chimeric mice, suggesting that the hyperlipidemic environment altered the wild-type platelets, rather than the genetic modification. The platelet proteome revealed high similarity between the three genotypes, without clear indication for a common protein-based gain-of-function. The platelet lipidome revealed an altered lipid profile in mildly hyperlipidemic mice. In conclusion, in Apoe-/- and Ldlr-/- mice, modest elevation in plasma and platelet cholesterol increased platelet responsiveness in thrombus formation and ensuing fibrin formation, resulting in a prothrombotic phenotype.
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Affiliation(s)
- Johanna P van Geffen
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Frauke Swieringa
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands.,Leibniz Institut für Analytische Wissenschaften - ISAS- e.V, Dortmund, Germany
| | - Kim van Kuijk
- Department of Pathology, CARIM, Maastricht University, Maastricht, The Netherlands
| | - Bibian M E Tullemans
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Fiorella A Solari
- Leibniz Institut für Analytische Wissenschaften - ISAS- e.V, Dortmund, Germany
| | - Bing Peng
- Leibniz Institut für Analytische Wissenschaften - ISAS- e.V, Dortmund, Germany
| | - Kenneth J Clemetson
- Department of Haematology, Inselspital, University of Bern, Bern, Switzerland
| | | | - Ludwig J Dubois
- The M-Lab, Department of Precision Medicine, School for Oncology and Developmental Biology (GROW), Maastricht University, Maastricht, The Netherlands
| | - Albert Sickmann
- Leibniz Institut für Analytische Wissenschaften - ISAS- e.V, Dortmund, Germany
| | - René P Zahedi
- Leibniz Institut für Analytische Wissenschaften - ISAS- e.V, Dortmund, Germany.,Segal Cancer Proteomics Centre, Jewish General Hospital, McGill University, Montreal, Canada
| | - Robert Ahrends
- Leibniz Institut für Analytische Wissenschaften - ISAS- e.V, Dortmund, Germany.,Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Wien, Austria
| | - Erik A L Biessen
- Department of Pathology, CARIM, Maastricht University, Maastricht, The Netherlands.,Institute for Molecular Cardiovascular Research, RWTH Aachen University, Aachen, Germany
| | - Judith C Sluimer
- Department of Pathology, CARIM, Maastricht University, Maastricht, The Netherlands.,BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Johan W M Heemskerk
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Marijke J E Kuijpers
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands.
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Brouns SLN, van Geffen JP, Campello E, Swieringa F, Spiezia L, van Oerle R, Provenzale I, Verdoold R, Farndale RW, Clemetson KJ, Spronk HMH, van der Meijden PEJ, Cavill R, Kuijpers MJE, Castoldi E, Simioni P, Heemskerk JWM. Platelet-primed interactions of coagulation and anticoagulation pathways in flow-dependent thrombus formation. Sci Rep 2020; 10:11910. [PMID: 32680988 PMCID: PMC7368055 DOI: 10.1038/s41598-020-68438-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/17/2020] [Indexed: 12/13/2022] Open
Abstract
In haemostasis and thrombosis, platelet, coagulation and anticoagulation pathways act together to produce fibrin-containing thrombi. We developed a microspot-based technique, in which we assessed platelet adhesion, platelet activation, thrombus structure and fibrin clot formation in real time using flowing whole blood. Microspots were made from distinct platelet-adhesive surfaces in the absence or presence of tissue factor, thrombomodulin or activated protein C. Kinetics of platelet activation, thrombus structure and fibrin formation were assessed by fluorescence microscopy. This work revealed: (1) a priming role of platelet adhesion in thrombus contraction and subsequent fibrin formation; (2) a surface-independent role of tissue factor, independent of the shear rate; (3) a mechanism of tissue factor-enhanced activation of the intrinsic coagulation pathway; (4) a local, suppressive role of the anticoagulant thrombomodulin/protein C pathway under flow. Multiparameter analysis using blood samples from patients with (anti)coagulation disorders indicated characteristic defects in thrombus formation, in cases of factor V, XI or XII deficiency; and in contrast, thrombogenic effects in patients with factor V-Leiden. Taken together, this integrative phenotyping approach of platelet–fibrin thrombus formation has revealed interaction mechanisms of platelet-primed key haemostatic pathways with alterations in patients with (anti)coagulation defects. It can help as an important functional add-on whole-blood phenotyping.
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Affiliation(s)
- Sanne L N Brouns
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Johanna P van Geffen
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Elena Campello
- Department of Medicine, University of Padua Medical School, Padua, Italy
| | - Frauke Swieringa
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands.,Department of Protein Dynamics, Leibniz Institute for Analytical Sciences, ISAS, Dortmund, Germany
| | - Luca Spiezia
- Department of Medicine, University of Padua Medical School, Padua, Italy
| | - René van Oerle
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Isabella Provenzale
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Remco Verdoold
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | | | - Kenneth J Clemetson
- Department of Haematology, Inselspital, University of Berne, Berne, Switzerland
| | - Henri M H Spronk
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Paola E J van der Meijden
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Rachel Cavill
- Department of Data Science and Knowledge Engineering, Maastricht University, Maastricht, The Netherlands
| | - Marijke J E Kuijpers
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Elisabetta Castoldi
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - Paolo Simioni
- Department of Medicine, University of Padua Medical School, Padua, Italy.
| | - Johan W M Heemskerk
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+, P.O. Box 616, 6200 MD, Maastricht, The Netherlands.
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Wicki AN, Walz A, Gerber-Huber SN, Wenger RH, Vornhagen R, Clemetson KJ. Isolation and Characterization of Human Blood Platelet mRNA and Construction of a cDNA Library in λgt11. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1646612] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryWe have developed a purification method for the isolation of platelet-specific poly (A+) RNA and demonstrated that human blood platelets, despite the absence of a nucleus, contain stable mRNA. The poly (A+) RNA was used to construct a platelet- specific cDNA expression library in λgtll. The platelet derivation of the purified mRNA was confirmed by identification of membrane glycoprotein Ib (GPIb) message by immunoprecipitation of rabbit reticulocyte lysate translation products with poly- and monoclonal antibodies against GPIbα and by sequencing of a GPIbα cDNA clone
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4
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Abstract
SummaryA simple, reproducible method for the specific labeling of the surface proteins of human platelets with tritium is described. The labeled platelets were analyzed by two-dimensional gel electrophoresis (isoelectric focusing/sodium dodecyl sulfate-poly-acrylamide gel electrophoresis) followed by fluorography and the results compared with those obtained by conventional methods. Reductive methylation gave an intense labeling of membrane glycoproteins. There was no cross-linking of the labeled membrane proteins by formaldehyde nor could clear evidence be found that inner proteins were labeled by permeation of the reagents through the plasma membrane. As well as previously described platelet membrane glycoproteins, several others could be detected that were not invariably seen using labeling techniques.
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Affiliation(s)
- Martin O Spycher
- The Theodor Kocher Institute, University of Berne, Berne, Switzerland
| | | | - Ernst F Lüscher
- The Theodor Kocher Institute, University of Berne, Berne, Switzerland
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Kehrel B, Kokott R, Balleisen L, Stenzinger W, Clemetson KJ, van de Loo J. Selective Staining of Platelet Glycoproteins Using Two-Dimensional O’Farrell Gel Electrophoresis and Avidin-Biotin-Conjugated Lectins. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1646036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryA time-saving and sensitive high resolution method lor the analysis and identification of platelet glycoproteins using non-radioactive compounds has been developed. Platelet proteins (50 μg) of normal subjects were separated by isoelectric focusing and SDS-PAGE. Proteins were either stained with silver or electroblotted onto nitrocellulose. Nitrocellulose blots were treated with the following biotinylated lectins : Abrus precatorius lectin, concanavalin A, Lens culinaris lectin, or wheat germ agglutinin. Staining was achieved by avidin-biotin-coupled peroxidase using 4-chloro-l-naphthol as the substrate. A rapid overview of platelet glycoproteins may be obtained by applying all the lectins to a single blot.
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Affiliation(s)
- Beate Kehrel
- The Institute for Arteriosclerosis Research at the University of Münster, University of Berne, Berne, Switzerland
| | - Renate Kokott
- The Institute for Arteriosclerosis Research at the University of Münster, University of Berne, Berne, Switzerland
| | - Leopold Balleisen
- The Department of Internal Medicine, University of Münster, Münster, Federal Republic of Germany
| | - Werner Stenzinger
- The Department of Internal Medicine, University of Münster, Münster, Federal Republic of Germany
| | | | - Jürgen van de Loo
- The Department of Internal Medicine, University of Münster, Münster, Federal Republic of Germany
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7
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Nagy M, Mastenbroek TG, Mattheij NJA, de Witt S, Clemetson KJ, Kirschner J, Schulz AS, Vraetz T, Speckmann C, Braun A, Cosemans JMEM, Zieger B, Heemskerk JWM. Variable impairment of platelet functions in patients with severe, genetically linked immune deficiencies. Haematologica 2017; 103:540-549. [PMID: 29242293 PMCID: PMC5830379 DOI: 10.3324/haematol.2017.176974] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 12/07/2017] [Indexed: 11/09/2022] Open
Abstract
In patients with dysfunctions of the Ca2+ channel ORAI1, stromal interaction molecule 1 (STIM1) or integrin-regulating kindlin-3 (FERMT3), severe immunodeficiency is frequently linked to abnormal platelet activity. In this paper, we studied platelet responsiveness by multiparameter assessment of whole blood thrombus formation under high-shear flow conditions in 9 patients, including relatives, with confirmed rare genetic mutations of ORAI1, STIM1 or FERMT3. In platelets isolated from 5 out of 6 patients with ORAI1 or STIM1 mutations, store-operated Ca2+ entry (SOCE) was either completely or partially defective compared to control platelets. Parameters of platelet adhesion and aggregation on collagen microspots were impaired for 4 out of 6 patients, in part related to a low platelet count. For 4 patients, platelet adhesion/aggregation and procoagulant activity on von Willebrand Factor (VWF)/rhodocytin and VWF/fibrinogen microspots were impaired independently of platelet count, and were partly correlated with SOCE deficiency. Measurement of thrombus formation at low shear rate confirmed a greater impairment of platelet functionality in the ORAI1 patients than in the STIM1 patient. For 3 patients/relatives with a FERMT3 mutation, all parameters of thrombus formation were strongly reduced regardless of the microspot. Bone marrow transplantation, required by 2 patients, resulted in overall improvement of platelet function. We concluded that multiparameter assessment of whole blood thrombus formation in a surface-dependent way can detect: i) additive effects of low platelet count and impaired platelet functionality; ii) aberrant ORAI1-mediated Ca2+ entry; iii) differences in platelet activation between patients carrying the same ORAI1 mutation; iv) severe platelet function impairment linked to a FERMT3 mutation and bleeding history.
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Affiliation(s)
- Magdolna Nagy
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Tom G Mastenbroek
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Nadine J A Mattheij
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Susanne de Witt
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | | | - Janbernd Kirschner
- Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Germany
| | - Ansgar S Schulz
- Department of Pediatrics and Adolescent Medicine, University Medical Centre Ulm, Germany
| | - Thomas Vraetz
- Department of Pediatrics and Adolescent Medicine, Medical Center-University of Freiburg, Faculty of Medicine, Germany
| | - Carsten Speckmann
- Center for Chronic Immunodeficiency and Department of Pediatrics and Adolescent Medicine, Medical Centre, University of Freiburg, Germany
| | - Attila Braun
- Institute of Experimental Biomedicine, University Hospital and Rudolf Virchow Centre, University of Würzburg, Germany
| | - Judith M E M Cosemans
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Barbara Zieger
- Center for Chronic Immunodeficiency and Department of Pediatrics and Adolescent Medicine, Medical Centre, University of Freiburg, Germany
| | - Johan W M Heemskerk
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
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Schmitz G, Rothe G, Ruf A, Barlage S, Tschöpe D, Clemetson KJ, Goodall AH, Michelson AD, Nurden AT, Shankey VT. European Working Group on Clinical Cell Analysis: Consensus Protocol for the Flow Cytometric Characterisation of Platelet Function. Thromb Haemost 2017. [DOI: 10.1055/s-0037-1615088] [Citation(s) in RCA: 183] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
IntroductionAn increased or disturbed activation and aggregation of platelets plays a major role in the pathophysiology of thrombosis and haemostasis and is related to cardiovascular disease processes. In addition to qualitative disturbances of platelet function, changes in thrombopoiesis or an increased elimination of platelets, (e. g., in autoimmune thrombocytopenia), are also of major clinical relevance. Flow cytometry is increasingly used for the specific characterisation of phenotypic alterations of platelets which are related to cellular activation, haemostatic function and to maturation of precursor cells. These new techniques also allow the study of the in vitro response of platelets to stimuli and the modification thereof under platelet-targeted therapy as well as the characterisation of platelet-specific antibodies. In this protocol, specific flow cytometric techniques for platelet analysis are recommended based on a description of the current state of flow cytometric methodology. These recommendations are an attempt to promote the use of these new techniques which are at present broadly evaluated for diagnostic purposes. Furthermore, the definition of the still open questions primarily related to the technical details of the method should help to promote the multi-center evaluation of procedures with the goal to finally develop standardized operation procedures as the basis of interlaboratory reproducibility when applied to diagnostic testing.
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Lee WH, Du XY, Lu QM, Clemetson KJ, Zhang Y. Stejnulxin, a novel snake C-type lectin-like protein from Trimeresurus stejnegeri venom is a potent platelet agonist acting specifically via GPVI. Thromb Haemost 2017; 90:662-71. [PMID: 14515187 DOI: 10.1160/th03-05-0269] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
SummaryStejnulxin, a novel snake C-type lectin-like protein with potent platelet activating activity, was purified and characterized from Trimeresurus stejnegeri venom. Under non-reducing conditions, it migrated on a SDS-polyacrylamide gel with an apparent molecular mass of 120 kDa. On reduction, it separated into three polypeptide subunits with apparent molecular masses of 16 kDa (α), 20 kDa (β1) and 22 kDa (β2), respectively. The complete amino acid sequences of its subunits were deduced from cloned cDNAs. The N-terminal sequencing and cDNA cloning indicated that β1 and β2 subunits of stejnulxin have identical amino acid sequences and each contains two N-glycosylation sites. Accordingly, the molecular mass difference between β1 and β2 is caused by glycosylation heterogenity. The subunit amino acid sequences of stejnulxin are similar to those of convulxin, with sequence identities of 52.6% and 66.4% for the α and β, respectively. Stejnulxin induced human platelet aggregation in a dose-dependent manner. Antibodies against αIIbβ3 inhibited the aggregation response to stejnulxin, indicating that activation of αIIbβ3 and binding of fibrinogen are involved in stejnulxin-induced platelet aggregation. Antibodies against GPIbα or α2β1 as well as echicetin or rhodocetin had no significant effect on stejnulxin-induced platelet aggregation. However, platelet activation induced by stejnulxin was blocked by anti-GPVI antibodies. In addition, stejnulxin induced a tyrosine phosphorylation profile in platelets that resembled that produced by convulxin. Biotinylated stejnulxin bound specifically to platelet membrane GPVI.
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Affiliation(s)
- Wen-Hui Lee
- Department of Animal Toxinology, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, Yunnan, PR China
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10
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Lu Q, Navdaev A, Clemetson JM, Clemetson KJ. GPIb is involved in platelet aggregation induced by mucetin, a snake C-type lectin protein from Chinese habu (Trimeresurus mucrosquamatus) venom. Thromb Haemost 2017; 91:1168-76. [PMID: 15175804 DOI: 10.1160/th03-12-0747] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
SummaryMucetin (Trimeresurus mucrosquamatus venom activator, TMVA) is a potent platelet activator purified from Chinese habu (Trimeresurus mucrosquamatus) venom. It belongs to the snake venom heterodimeric C-type lectin family and exists in several multimeric forms. We now show that binding to platelet glycoprotein (GP) Ib is involved in mucetin-induced platelet aggregation. Antibodies against GPIb as well as the GPIb-blocking C-type lectin echicetin inhibited mucetin-induced platelet aggregation. Binding of GPIb was confirmed by affinity chromatography and Western blotting. Antibodies against GPVI inhibited convulxin- but not mucetin-induced aggregation. Signalling by mucetin involved rapid tyrosine phosphorylation of a number of proteins including Syk, Src, LAT and PLCγ2. Mucetininduced phosphorylation of the Fcγ chain of platelet was greatly promoted by inhibition of αIIbβ3 by the peptidomimetic EMD 132338, suggesting that phosphatases downstream of αIIbβ3 activation are involved in dephosphorylation of Fcγ. Unlike other multimeric snake C-type lectins that act via GPIb and only agglutinate platelets, mucetin activates αIIbβ3. Inhibition of αIIbβ3 strongly reduced the aggregation response to mucetin, indicating that activation of αIIbβ3 and binding of fibrinogen are involved in mucetin-induced platelet aggregation. Apyrase and aspirin also inhibit platelet aggregation induced by mucetin, suggesting that ADP and thromboxane A2 are involved in autocrine feedback. Sequence and structural comparison with closely related members of this protein family point to features that may be responsible for the functional differences.
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Affiliation(s)
- Qiumin Lu
- Theodor Kocher Institute, University of Bern, Switzerland
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11
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Clemetson KJ. The origins of major platelet receptor nomenclature. Platelets 2016; 28:40-42. [PMID: 27715379 DOI: 10.1080/09537104.2016.1204437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The nomenclature of the major platelet receptors may appear complex, but in fact there are logical reasons why it developed in the way it did. In this short review, I describe the origins of this nomenclature, how it developed as more information became available and as relationships were established with receptors on other types of cells. Difficulties have also arisen with alternative nomenclature systems and the various equivalences with these are described and listed. There remain areas such as immunology and transfusion where the accepted nomenclature leaves something to be desired, but it is unlikely that major changes will occur.
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Affiliation(s)
- Kenneth J Clemetson
- a Haemostasis Research, Department of Haematology , Inselspital, University of Berne , Berne , Switzerland.,b Department Clinical Research , Inselspital, University of Berne , Berne , Switzerland
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12
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13
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Jenkins CS, Clemetson KJ. Membrane glycoproteins in normal and pathological platelets. Bibl Haematol 2015; 45:14-21. [PMID: 570835 DOI: 10.1159/000402178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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14
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McGregor JL, Clemetson KJ. Biochemistry of the platelet membrane. Curr Stud Hematol Blood Transfus 2015:5-31. [PMID: 3284720 DOI: 10.1159/000415420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- J L McGregor
- Université Claude Bernard Lyon I, Faculté de Médecine Alexis Carrel, INSERM U63-Laboratoire d'Hémobiologie, Lyon, France
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15
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van Geffen JP, Kleinegris MC, Verdoold R, Baaten CCFMJ, Cosemans JMEM, Clemetson KJ, Ten Cate H, Roest M, de Laat B, Heemskerk JWM. Normal platelet activation profile in patients with peripheral arterial disease on aspirin. Thromb Res 2015; 135:513-20. [PMID: 25600441 DOI: 10.1016/j.thromres.2014.12.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 12/22/2014] [Accepted: 12/30/2014] [Indexed: 02/05/2023]
Abstract
BACKGROUND Peripheral arterial disease (PAD) is a progressive vascular disease associated with a high risk of cardiovascular morbidity and death. Antithrombotic prevention is usually applied by prescribing the antiplatelet agent aspirin. However, in patients with PAD aspirin fails to provide protection against myocardial infarction and death, only reducing the risk of ischemic stroke. Platelets may play a role in disease development, but this has not been tested by proper mechanistic studies. In the present study, we performed a systematic evaluation of platelet reactivity in whole blood from patients with PAD using two high-throughput assays, i.e. multi-agonist testing of platelet activation by flow cytometry and multi-parameter testing of thrombus formation on spotted microarrays. METHODS Blood was obtained from 40 patients (38 on aspirin) with PAD in majority class IIa/IIb and from 40 age-matched control subjects. Whole-blood flow cytometry and multiparameter thrombus formation under high-shear flow conditions were determined using recently developed and validated assays. RESULTS Flow cytometry of whole blood samples from aspirin-treated patients demonstrated unchanged high platelet responsiveness towards ADP, slightly elevated responsiveness after glycoprotein VI stimulation, and decreased responsiveness after PAR1 thrombin receptor stimulation, compared to the control subjects. Most parameters of thrombus formation under flow were similarly high for the patient and control groups. However, in vitro aspirin treatment caused a marked reduction in thrombus formation, especially on collagen surfaces. When compared per subject, markers of ADP- and collagen-induced integrin activation (flow cytometry) strongly correlated with parameters of collagen-dependent thrombus formation under flow, indicative of a common, subject-dependent regulation of both processes. CONCLUSION Despite of the use of aspirin, most platelet activation properties were in the normal range in whole-blood from class II PAD patients. These data underline the need for more effective antithrombotic pharmacoprotection in PAD.
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Affiliation(s)
- Johanna P van Geffen
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Marie-Claire Kleinegris
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Remco Verdoold
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Constance C F M J Baaten
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Judith M E M Cosemans
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Kenneth J Clemetson
- Department of Haematology, Inselspital, University of Bern, CH-3010 Bern, Switzerland
| | - Hugo Ten Cate
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Mark Roest
- Department of Clinical Chemistry and Haematology, University Medical Centre, Utrecht The Netherlands; Synapse B.V., Maastricht University, Maastricht, The Netherlands
| | - Bas de Laat
- Synapse B.V., Maastricht University, Maastricht, The Netherlands
| | - Johan W M Heemskerk
- Departments of Biochemistry and Internal Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands.
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Navdaev A, Subramanian H, Petunin A, Clemetson KJ, Gambaryan S, Walter U. Echicetin coated polystyrene beads: a novel tool to investigate GPIb-specific platelet activation and aggregation. PLoS One 2014; 9:e93569. [PMID: 24705415 PMCID: PMC3976279 DOI: 10.1371/journal.pone.0093569] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 03/05/2014] [Indexed: 01/01/2023] Open
Abstract
von Willebrand factor/ristocetin (vWF/R) induces GPIb-dependent platelet agglutination and activation of αIIbβ3 integrin, which also binds vWF. These conditions make it difficult to investigate GPIb-specific signaling pathways in washed platelets. Here, we investigated the specific mechanisms of GPIb signaling using echicetin-coated polystyrene beads, which specifically activate GPIb. We compared platelet activation induced by echicetin beads to vWF/R. Human platelets were stimulated with polystyrene beads coated with increasing amounts of echicetin and platelet activation by echicetin beads was then investigated to reveal GPIb specific signaling. Echicetin beads induced αIIbβ3-dependent aggregation of washed platelets, while under the same conditions vWF/R treatment led only to αIIbβ3-independent platelet agglutination. The average distance between the echicetin molecules on the polystyrene beads must be less than 7 nm for full platelet activation, while the total amount of echicetin used for activation is not critical. Echicetin beads induced strong phosphorylation of several proteins including p38, ERK and PKB. Synergistic signaling via P2Y12 and thromboxane receptor through secreted ADP and TxA2, respectively, were important for echicetin bead triggered platelet activation. Activation of PKG by the NO/sGC/cGMP pathway inhibited echicetin bead-induced platelet aggregation. Echicetin-coated beads are powerful and reliable tools to study signaling in human platelets activated solely via GPIb and GPIb-triggered pathways.
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Affiliation(s)
- Alexey Navdaev
- Institute of Clinical Biochemistry and Pathobiochemistry, University of Wuerzburg, Wuerzburg, Germany
| | - Hariharan Subramanian
- Institute of Clinical Biochemistry and Pathobiochemistry, University of Wuerzburg, Wuerzburg, Germany
| | - Alexey Petunin
- Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia
| | | | - Stepan Gambaryan
- Institute of Clinical Biochemistry and Pathobiochemistry, University of Wuerzburg, Wuerzburg, Germany
- Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg, Russia
| | - Ulrich Walter
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Mainz, Germany
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Rosing J, Clemetson KJ, Kini RM. Preface. TOXIN REV 2013. [DOI: 10.3109/15569543.2014.860256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Kappelmayer J, Beke Debreceni I, Vida A, Antal-Szalmás P, Clemetson KJ, Nagy B. Distinct effects of Re- and S-forms of LPS on modulating platelet activation. J Thromb Haemost 2013; 11:775-8. [PMID: 23347166 DOI: 10.1111/jth.12151] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Accepted: 01/17/2013] [Indexed: 11/30/2022]
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Andrews RK, Aster RH, Atkinson BT, Barnard MR, Bavry AA, Bayer AS, Beaulieu LM, Berndt MC, Berny-Lang MA, Bhatt DL, Bizzaro N, Bledzka K, Bouchard BA, Brass LF, Bray PF, Briggs C, Bussel JB, Cattaneo M, Chakravorty S, Chong BH, Clemetson J, Clemetson KJ, Coller BS, Covic L, Davì G, del Zoppo GJ, Dowling MR, Dubois C, Eisert WG, Evangelista V, Flaumenhaft R, Freedman JE, Freedman J, Frelinger AL, Furie BC, Furie B, Gardiner C, Gawaz M, Geisler T, Greinacher A, Gurbel PA, Harrison P, Hartwig JH, Hayward CP, Hughes CE, Ikeda Y, Israels SJ, Italiano JE, Jackson S, Jain S, Jones CI, Josefsson EC, Kaplan C, Kile BT, Kimura Y, Klement GL, Kolandaivelu K, Kuliopulos A, Kuter DJ, Lambert MP, Langer HF, Lebois M, Levin J, Lordkipanidzé M, Ma YQ, Mannucci PM, McCrae KR, Merrill-Skoloff G, Michelson AD, Moffat KA, Mutch NJ, Newman DK, Newman PE, Ni H, Nieuwland R, Ouwehand WH, Parsons J, Patrono C, Perrotta PL, Pesho MM, Plow EF, Politt AY, Poncz M, Poon MC, Provost P, Psaila B, Rao AK, Rinder HM, Roberts IA, Rondina MT, Ruggeri ZM, Santilli F, Schwertz H, Shai E, Silveira JR, Smith BR, Smith MC, Smyth SS, Snyder EL, Sobel M, Soranzo N, Stalker TJ, Sturk A, Sudo T, Sullivan S, Tantry US, Tefferi A, Tracy PB, Tsai HM, van der Pol E, Varon D, Vazzana N, Vieira-de-Abreu A, Wannemacher K, Ware J, Warkentin TE, Watson SP, Weyrich AS, White JG, Wilcox DA, Yeaman MR, Zhang P, Zhu L, Zimmerman GA. List of Contributors. Platelets 2013. [DOI: 10.1016/b978-0-12-387837-3.00072-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Nagy B, Miszti-Blasius K, Kerenyi A, Clemetson KJ, Kappelmayer J. Potential therapeutic targeting of platelet-mediated cellular interactions in atherosclerosis and inflammation. Curr Med Chem 2012; 19:518-31. [PMID: 22204330 DOI: 10.2174/092986712798918770] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 11/15/2011] [Accepted: 11/17/2011] [Indexed: 11/22/2022]
Abstract
Cellular interactions among platelets, leukocytes and endothelial cells are considered as a major cause of inflammation and atherosclerosis in many diseases. Via exposed surface receptors and released soluble substances, activated platelets play a crucial role in the initiation of inflammatory processes, resulting in endothelial injury and leading to formation of atherosclerotic plaque with possible thrombotic complications. Classic anti-platelet treatments (e.g. cyclooxygenase inhibitor or ADP-receptor antagonist) have favorable effects in patients with vascular diseases, but they also have several limitations such as increased bleeding risk or non-responsiveness. Thus, the need and opportunities for developing novel therapeutic inhibitors for platelet-mediated events are obvious. Animal and (pre)clinical human studies have suggested that some recently produced specific antagonists of P-selectin from α-granules, as well as its main ligand/receptor P-selectin Glycoprotein Ligand-1, the two major platelet chemokines CXCL4 and CCL5, as well as CD40L, may be considered potential new candidates in the treatment of atherogenesis and inflammation. In this review, we summarize the pathophysiological roles of these effectors in platelet activation and acute or chronic inflammation, and discuss the latest findings on promising antagonistic agents in basic and clinical studies in the prevention of platelet-mediated cellular interactions.
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Affiliation(s)
- B Nagy
- Department of Laboratory Medicine, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary
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Abstract
Platelets have a critical role in haemostasis when vessel wall is injured. Platelet receptors are involved in sequence in this process by slowing platelets down via GPIb/von Willebrand factor to bring them into contact with exposed collagen, then activating them via GPVI to release granule contents and express integrins in a matrix protein binding state. More platelets are incorporated into the growing thrombus and a series of events are set off that finishes with the exposed subendothelium protected by a non-thrombogenic platelet surface and tissue repair underway and the blood flow through the vessel maintained. GPIb is also involved in thrombin activation and, together with GPVI, in the formation of COAT platelets. In thrombosis, pathological changes occur that may lead to life-threatening blockage of vessels. Prevention of thrombosis while maintaining haemostasis remains a major goal of medical research.
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Affiliation(s)
- Kenneth J Clemetson
- Department of Haematology, Inselspital, University of Berne, CH-3010 Berne, Switzerland.
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Abstract
Many more platelets are present in healthy mammals than are necessary for routine haemostasis. Thus, they could have other functions. Platelets have many of the attributes of innate immune function including Toll-like receptors. They also contain a wide range of anti-microbial peptides in storage granules. Platelets play an important role in bacterial infections, both in disease progress and in defence mechanisms depending on circumstances. Similar mechanisms are used in defence against fungi. Platelets are also involved in viral diseases, either in protecting from the immune system or in killing viruses that activate platelets. Finally, platelets have a role in defence against parasitic diseases, in particular malaria, that should not be ignored, and may aggravate some of the worst aspects. Platelets also have receptors for IgE and are implicated via parasitic disorders in development and problems of allergy.
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Affiliation(s)
- K J Clemetson
- Dept. of Haematology, University of Bern, Bern, Switzerland.
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Clemetson KJ. Snaclecs (snake C-type lectins) that inhibit or activate platelets by binding to receptors. Toxicon 2010; 56:1236-46. [DOI: 10.1016/j.toxicon.2010.03.011] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2010] [Accepted: 03/15/2010] [Indexed: 11/25/2022]
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Clemetson KJ, Panzer S. The working group for “basic science” in ITP at the International Cooperative ITP Study Group (ICIS). Ann Hematol 2010. [DOI: 10.1007/s00277-009-0883-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Affiliation(s)
- Kenneth J Clemetson
- Theodor Kocher Institute, University of Berne, Freiestrasse 1, 3012 Berne, Switzerland.
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Abstract
The snake C-type lectins are a major group of proteins present in venoms that fold to a structure with similarities to classic C-type lectins. The loop that would be involved in calcium and sugar binding is truncated and heterodimers are linked by a disulphide bond and by swapping loop domains between the subunits. M any of these C-type lectins interact with platelet receptors to inhibit or induce platelet activation. The use of these C-type lectins to investigate platelet function is discussed and illustrated with specific examples.
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Affiliation(s)
- K J Clemetson
- Theodor Kocher Institute, University of Berne, Switzerland.
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Affiliation(s)
- K J Clemetson
- Theodor Kocher Institute, University of Berne, Freiestrasse 1, CH-3012 Berne, Switzerland
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Clemetson KJ, Morita T, Manjunatha Kini R. Scientific and standardization committee communications: classification and nomenclature of snake venom C-type lectins and related proteins. J Thromb Haemost 2009; 7:360. [PMID: 19036075 DOI: 10.1111/j.1538-7836.2008.03233.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K J Clemetson
- Theodor Kocher Institute, University of Berne, Berne, Switzerland.
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Hooley E, Papagrigoriou E, Navdaev A, Pandey AV, Clemetson JM, Clemetson KJ, Emsley J. The crystal structure of the platelet activator aggretin reveals a novel (alphabeta)2 dimeric structure. Biochemistry 2008; 47:7831-7. [PMID: 18597489 DOI: 10.1021/bi800528t] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Aggretin is a C-type lectin purified from Calloselasma rhodostoma snake venom. It is a potent activator of platelets, resulting in a collagen-like response by binding and clustering platelet receptor CLEC-2. We present here the crystal structure of aggretin at 1.7 A which reveals a unique tetrameric quaternary structure. The two alphabeta heterodimers are arranged through 2-fold rotational symmetry, resulting in an antiparallel side-by-side arrangement. Aggretin thus presents two ligand binding sites on one surface and can therefore cluster ligands in a manner reminiscent of convulxin and flavocetin. To examine the molecular basis of the interaction with CLEC-2, we used a molecular modeling approach of docking the aggretin alphabeta structure with the CLEC-2 N-terminal domain (CLEC-2N). This model positions the CLEC-2N structure face down in the "saddle"-shaped binding site which lies between the aggretin alpha and beta lectin-like domains. A 2-fold rotation of this complex to generate the aggretin tetramer reveals dimer contacts for CLEC-2N which bring the N- and C-termini into the proximity of each other, and a series of contacts involving two interlocking beta-strands close to the N-terminus are described. A comparison with homologous lectin-like domains from the immunoreceptor family reveals a similar but not identical dimerization mode, suggesting this structure may represent the clustered form of CLEC-2 capable of signaling across the platelet membrane.
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Affiliation(s)
- Elizabeth Hooley
- Centre for Biomolecular Sciences, School of Pharmacy, University of Nottingham, UK
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Abstract
An L-amino acid oxidase (LAAO), NA-LAAO, was purified from the venom of Naja atra. Its N-terminal sequence shows great similarity with LAAOs from other snake venoms. NA-LAAO dose-dependently induced aggregation of washed human platelets. However, it had no activity on platelets in platelet-rich plasma. A low concentration of NA-LAAO greatly promoted the effect of hydrogen peroxide, whereas hydrogen peroxide itself had little activation effect on platelets. NA-LAAO induced tyrosine phosphorylation of a number of platelet proteins including Src kinase, spleen tyrosine kinase, and phospholipase Cgamma2. Unlike convulxin, Fc receptor gamma chain and T lymphocyte adapter protein are not phosphorylated in NA-LAAO-activated platelets, suggesting an activation mechanism different from the glycoprotein VI pathway. Catalase inhibited the platelet aggregation and platelet protein phosphorylation induced by NA-LAAO. NA-LAAO bound to fixed platelets as well as to platelet lysates of Western blots. Furthermore, affinity chromatography of platelet proteins on an NA-LAAO-Sepharose 4B column isolated a few platelet membrane proteins, suggesting that binding of NA-LAAO to the platelet membrane might play a role in its action on platelets.
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Affiliation(s)
- Rui Li
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
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Abstract
Platelets have important roles in atherosclerosis and thrombosis and their inhibition reduces the risk of these disorders. There is still a need for platelet inhibitors affecting pathways that reduce thrombosis and atherosclerosis while leaving normal hemostasis relatively unaffected, thus reducing possible bleeding complications. Although combinations show progress in achieving these goals none of the present inhibitors completely fulfill these requirements. Collagen receptors offer attractive possibilities as alternative targets at early stages in platelet activation. Three major collagen receptors are assessed in this review; the alpha2beta1 integrin, responsible primarily for platelet adhesion to collagen; GPVI, the major signaling receptor for collagen; and GPIb-V-IX, which is indirectly a collagen receptor via von Willebrand factor. Several thrombosis models and experimental approaches suggest that all three are interesting targets and merit further investigation.
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Affiliation(s)
- Kenneth J Clemetson
- Theodor Kocher Institute, University of Berne, Freiestrasse 1, CH-3012, Berne, Switzerland.
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Thiele T, Steil L, Gebhard S, Scharf C, Hammer E, Brigulla M, Lubenow N, Clemetson KJ, Völker U, Greinacher A. Profiling of alterations in platelet proteins during storage of platelet concentrates. Transfusion 2007; 47:1221-33. [PMID: 17581157 DOI: 10.1111/j.1537-2995.2007.01255.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND The quality of platelet concentrates (PCs) is primarily determined in vitro by selective methods (e.g., pH, aggregometry), which provide only limited information on certain platelet (PLT) characteristics. In contrast, proteomic technologies provide a comprehensive overview of the PLT proteome. High interassay variability, however, limits meaningful assessment of samples taken from the same product over time or before and after processing. STUDY DESIGN AND METHODS Differential in-gel electrophoresis (DIGE) and mass spectrometry were applied to analyze changes in the PLT proteome during storage of PCs. RESULTS DIGE provides a comprehensive and reproducible overview of the cytoplasmic PLT proteome (median standard deviation of protein spot intensities, 5%-9%). Although 97 percent of cytosolic PLT proteins remained unchanged over a 9-day storage period, septin 2 showed characteristic alterations that preceded by several days more widespread alterations affecting numerous other proteins. Also beta-actin and gelsolin are potential marker proteins for changes in the PLT proteome. Interestingly septin 2 and gelsolin are affected during apoptosis, indicating that apoptosis in PCs may have an impact on PLT storage. CONCLUSION DIGE is a tool for comprehensively assessing the impact of storage on the global proteome profile of therapeutic PCs. Most of the changes detected are in high-abundance PLT proteins.
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Affiliation(s)
- Thomas Thiele
- Institute for Immunology and Transfusion Medicine, Ernst-Moritz-Arndt University, Greifswald, Germany
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Clemetson KJ. A short history of platelet glycoprotein Ib complex. Thromb Haemost 2007; 98:63-8. [PMID: 17597992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Affiliation(s)
- Kenneth J Clemetson
- Theodor Kocher Institute, University of Berne, Freiestrasse 1, CH-3012 Berne, Switzerland.
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Clemetson KJ. American Society of Hematology--48th Annual Meeting and Exposition. Updates on therapies. 9-12 December 2006 Orlando, FL, USA. IDrugs 2007; 10:90-2. [PMID: 17285456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Affiliation(s)
- Kenneth J Clemetson
- University of Berne, Theodor Kocher Institute, Freiestrasse 1, CH-3012 Berne, Switzerland.
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Afshar-Kharghan V, Agah R, Andrews RK, Aster RH, Atkinson B, Awtry EH, Bahou WF, Barnard MR, Bavry AA, Bayer AS, Becker RC, Bergmeier W, Berndt MC, Bhatt DL, Bizzaro N, Blajchman MA, Bouchard BA, Brass LF, Bray PF, Briggs C, Brill A, Bussel JB, Butenas S, Cattaneo M, Chong BH, Clemetson KJ, Clemetson JM, Coller BS, Crawford LE, de Groot PG, del Zoppo GJ, Dubois C, Eisert WG, FitzGerald GA, Francis JL, Freedman JE, Freedman J, Frelinger III A, Fries S, Furie BC, Furie B, Furman MI, García-Alonso Á, Goldschmidt PJ, Grosser T, Gurguis GN, Harrison P, Hartwig JH, Ike da YU, Israels SJ, Italiano JE, Jennings LK, Kaplan C, Karpatkin S, Keeling DM, Kimura Y, Kurkjian CD, Kuter DJ, Lambert MP, Lee DH, Levin J, Li QX, Li Z, Lind SE, Linden MD, Lopes NH, López JA, Loscalzo J, Ma YQ, Machin SJ, Mann KG, Mannucci PM, Maron BA, Masters CL, McCrae KR, McEver RP, Menart B, Michelson AD, Moake J, Murray N, Nardi MA, Newman DK, Newman PJ, Nierodzik ML, Nieuwland R, Novinska M, Nurden AT, Nurden P, Perrotta PL, Pesho MM, Plow EF, Poncz M, Poon MC, Prévost N, Rao AK, Rathore V, Reed GL, Rex S, Rinder CS, Rinder HM, Roberts I, Ruggeri ZM, Savage B, Savion N, Senis Y, Shattil SJ, Sixma JJ, Smith BR, Snyder EL, Sobel M, Stalker TJ, Steinhubl SR, Stratmann B, Sturk A, Sudo T, Tef feri AL, Tomlinson MG, Topol EJ, Tracy PB, Tschoepe D, Varon D, Vijayan KV, Wagner DD, Watson SP, White, II GC, White JG, McCabe White M, Wilcox DA, Woulfe DS, Yeaman MR, Zhu L. Contributors. Platelets 2007. [DOI: 10.1016/b978-012369367-9/50760-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Liang HPH, Morel-Kopp MC, Clemetson JM, Clemetson KJ, Kekomaki R, Kroll H, Michaelides K, Tuddenham EGD, Vanhoorelbeke K, Ward CM. A common ancestral glycoprotein (GP) 9 1828A>G (Asn45Ser) gene mutation occurring in European families from Australia and Northern Europe with Bernard-Soulier Syndrome (BSS). Thromb Haemost 2006; 94:599-605. [PMID: 16268478 DOI: 10.1160/th05-03-0165] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Bernard-Soulier syndrome (BSS) is an extremely rare hereditary bleeding disorder, caused by mutations occurring in the Glycoprotein (GP) Ibalpha, GPIbbeta and GP9 genes that encode for the corresponding subunits of platelet GPIb-V-IX adhesion receptor complex. BSS has been reported in many populations, mostly behaving in an autosomal-recessive manner.While the great majority of BSS mutations are unique to a single individual or family, the GP9 1828A>G Asn45Ser mutation, which we have identified in an undocumented Australian Caucasian, has already been reported in multiple unrelated Caucasian families from various Northern and Central European countries. Haplotype analysis of 19 BSS patients from 15 unrelated Northern European families (including 2 compound heterozygote siblings from a British family previously published, and 17 1828A>G Asn45Ser homozygotes), showed that 14 of these BSS patients from 11 of the 1828A>G Asn45Ser homozygote families share a common haplotype at the chromosomal region 3' to the GP9 gene. Hence, the results suggest that the GP9 1828A>GAsn45Ser mutation in these families is ancient, and its frequent emergence in the European population is the result of a founder effect rather than recurrent mutational events. Association of the 1828A>G Asn45Ser mutation with variant haplotypes in 4 other Northern European BSS families raised the possibility of a second founder event, or rare recombinations in these families. Additional members from these 'atypical' lineages would need to be screened to resolve this question.
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Affiliation(s)
- Hai Po Helena Liang
- Northern Blood Research Centre, Department of Haematology and Transfusion Medicine, Royal North Shore Hospital, St Leonards, Australia.
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Abstract
Snake venoms are complex mixtures of biologically active proteins and peptides. Many affect haemostasis by activating or inhibiting coagulant factors or platelets, or by disrupting endothelium. Snake venom components are classified into various families, such as serine proteases, metalloproteinases, C-type lectin-like proteins, disintegrins and phospholipases. Snake venom C-type lectin-like proteins have a typical fold resembling that in classic C-type lectins such as the selectins and mannose-binding proteins. Many snake venom C-type lectin-like proteins have now been characterized, as heterodimeric structures with alpha and beta subunits that often form large molecules by multimerization. They activate platelets by binding to VWF or specific receptors such as GPIb, alpha2beta1 and GPVI. Simple heterodimeric GPIb-binding molecules mainly inhibit platelet functions, whereas multimeric ones activate platelets. A series of tetrameric snake venom C-type lectin-like proteins activates platelets by binding to GPVI while another series affects platelet function via integrin alpha2beta1. Some act by inducing VWF to bind to GPIb. Many structures of these proteins, often complexed with their ligands, have been determined. Structure-activity studies show that these proteins are quite complex despite similar backbone folding. Snake C-type lectin-like proteins often interact with more than one platelet receptor and have complex mechanisms of action.
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Abstract
Recent studies have implied that GPIb-IX-V as well as functioning as an adhesion receptor may also induce signaling to mediate binding of platelets to damaged vessel wall to prevent bleeding. Reorganization of the cytoskeleton and redistribution of platelet structural proteins and signaling molecules are thought to be important in this early activation process, though the molecular mechanisms remain to be fully defined. In this study, we have used mucetin, a snake venom lectin protein that activates platelets via GPIb, to study the redistribution of GPIb in platelets. In unstimulated platelets, a minor portion of GPIb localized to Triton-insoluble cytoskeleton fractions (TIC). This portion increased considerably after platelet activation by mucetin. We also find increased contents of the FcRgamma chain in TIC. Anti-GPIb antibodies, mocarhagin or cytochalasin D completely inhibited the cytoskeletal translocation. In addition, BAPTA-AM, a cytoplasmic calcium chelator, strongly inhibited this process. On the other hand, inhibitors of alphaIIbbeta3, PLCgamma, PKC, tyrosine kinases, ADP receptor, PI3-kinase or EDTA are effective in preventing GPIb relocation in convulxin- but not in mucetin-activated platelets. We propose that cytoskeletal translocation of GPIb is upstream of alphaIIbbeta3 activation and cross-linking of GPIb is sufficient to induce this event in mucetin-activated platelets.
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Affiliation(s)
- Q Lu
- Theodor Kocher Institute, University of Berne, Freiestrasse 1, Berne, Switzerland
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40
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Abstract
Snake venoms are complex mixtures of biologically active proteins and peptides. Many of them affect hemostasis by activating or inhibiting coagulant factors or platelets, or by disrupting endothelium. Based on sequence, these snake venom components have been classified into various families, such as serine proteases, metalloproteinases, C-type lectins, disintegrins and phospholipases. The various members of a particular family act selectively on different blood coagulation factors, blood cells or tissues. For almost every factor involved in coagulation or fibrinolysis there is a venom protein that can activate or inactivate it. Venom proteins affect platelet function by binding or degrading vWF or platelet receptors, activating protease-activated receptors or modulating ADP release and thromboxane A2 formation. Some venom enzymes cleave key basement membrane components and directly affect capillary blood vessels to cause hemorrhaging. L-Amino acid oxidases activate platelets via H2O2 production.
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Affiliation(s)
- Q Lu
- Theodor Kocher Institute, University of Berne, Berne, Switzerland
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Lu Q, Navdaev A, Clemetson JM, Clemetson KJ. Snake venom C-type lectins interacting with platelet receptors. Structure–function relationships and effects on haemostasis. Toxicon 2005; 45:1089-98. [PMID: 15876445 DOI: 10.1016/j.toxicon.2005.02.022] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/23/2004] [Indexed: 11/16/2022]
Abstract
Snake venoms contain components that affect the prey either by neurotoxic or haemorrhagic effects. The latter category affect haemostasis either by inhibiting or activating platelets or coagulation factors. They fall into several types based upon structure and mode of action. A major class is the snake C-type lectins or C-type lectin-like family which shows a typical folding like that in classic C-type lectins such as the selectins and mannose-binding proteins. Those in snake venoms are mostly based on a heterodimeric structure with two subunits alpha and beta, which are often oligomerized to form larger molecules. Simple heterodimeric members of this family have been shown to inhibit platelet functions by binding to GPIb but others activate platelets via the same receptor. Some that act via GPIb do so by inducing von Willebrand factor to bind to it. Another series of snake C-type lectins activate platelets by binding to GPVI while yet another series uses the integrin alpha(2)beta(1) to affect platelet function. The structure of more and more of these C-type lectins have now been, and are being, determined, often together with their ligands, casting light on binding sites and mechanisms. In addition, it is relatively easy to model the structure of the C-type lectins if the primary structure is known. These studies have shown that these proteins are quite a complex group, often with more than one platelet receptor as ligand and although superficially some appear to act as inhibitors, in fact most function by inducing thrombocytopenia by various routes. The relationship between structure and function in this group of venom proteins will be discussed.
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Affiliation(s)
- Qiumin Lu
- Theodor Kocher Institute, University of Berne, Freiestrasse 1, CH-3012, Berne, Switzerland
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Affiliation(s)
- N O Solum
- Research Institute for Internal Medicine, Rikshospitalet, University of Oslo, Oslo, Norway
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Alberio L, Clemetson KJ. [Platelet inhibition and activation. Mechanisms and clinical implications]. Herz 2005; 30:176-80. [PMID: 15902367 DOI: 10.1007/s00059-005-2681-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The sensitivity to activation of platelets is part of the delicate equilibrium differentiating hemostasis from thrombosis. Under physiological conditions it is maintained by downregulating platelet activity and removing agonists. Under pathologic conditions the clinician tries to restore this equilibrium with pharmaceutical drugs. The results obtained by such treatments are steadily improving but there is still need for better knowledge of the mechanisms involved and for alternative inhibitors.
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Affiliation(s)
- Lorenzo Alberio
- Klinik und Poliklinik für Hämatologie und Hämatologisches Zentrallabor der Universität, Inselspital, Bern, Schweiz
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Alberio LJ, Clemetson KJ. All platelets are not equal: COAT platelets. Curr Hematol Rep 2004; 3:338-43. [PMID: 15341700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
Collagen- and thrombin-activated (COAT) platelets were first described in 2000 and have attracted considerable interest, changing the interpretation of the way in which platelets contribute to thrombin generation and how their procoagulant activity is organized. Platelets activated by two agonists coming from glycoprotein VI or Fc gamma-receptor IIA agonists on the one hand and thrombin on the other produce a population of approximately 50% highly procoagulant active platelets. This subgroup is formed by tissue transglutaminase and factor XIIIa linking of serotonin to the procoagulant proteins from granules or plasma, and these serotonylated proteins bind to fibrinogen or thrombospondin on the platelet surface. Serotonylation in the platelet cytoplasm has recently been shown to be an important regulating mechanism governing the activation of small GTPases and their function in granule release. Recent studies with Tph-/- mice in which the peripheral serotonin, including that in platelets, is very strongly reduced, have shown a prolonged bleeding time, suggesting it has an important hemostatic role in the release of platelet von Willebrand factor. More knowledge about how COAT platelets are formed will be important for a better understanding of the physiology and pathology of hemostasis.
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Affiliation(s)
- Lorenzo J Alberio
- Theodor Kocher Institute, University of Berne, Freiestrasse 1, CH-3012 Berne, Switzerland
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Stephens G, Yan Y, Jandrot-Perrus M, Villeval JL, Clemetson KJ, Phillips DR. Platelet activation induces metalloproteinase-dependent GP VI cleavage to down-regulate platelet reactivity to collagen. Blood 2004; 105:186-91. [PMID: 15339851 DOI: 10.1182/blood-2004-07-2842] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Glycoprotein (GP) VI, the primary collagen receptor on platelets, has been shown to have variable expression, possibly as a consequence of immune modulation. The present study was designed to determine the mechanism by which GP VI clearance occurs. We found that direct activation of GP VI both by a GP VI-specific antibody and by GP VI ligands (collagen and convulxin) reduced binding of biotinylated convulxin to the stimulated platelets. Analysis of immunoblots of platelets and supernatants showed that the stimulated platelets contained less GP VI, while the soluble fraction contained a 57-kDa cleavage product. Stimulation of platelets with PAR-1 agonists (TRAP peptide and thrombin) also caused GP VI cleavage, although the amount of GP VI loss was less than that observed with direct GP VI ligands. The metalloproteinase (MMP) inhibitors GM6001 and TAPI prevented both the clearance of GP VI from the platelet surface and the appearance of the soluble cleavage product. Induction of GP VI cleavage caused specific down-regulation of collagen-induced platelet aggregation, providing a mechanism for the modulation of platelet responsiveness to this important platelet agonist.
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Chavakis T, Santoso S, Clemetson KJ, Sachs UJH, Isordia-Salas I, Pixley RA, Nawroth PP, Colman RW, Preissner KT. High molecular weight kininogen regulates platelet-leukocyte interactions by bridging Mac-1 and glycoprotein Ib. J Biol Chem 2003; 278:45375-81. [PMID: 12952972 DOI: 10.1074/jbc.m304344200] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Leukocyte-platelet interaction is important in mediating leukocyte adhesion to a thrombus and leukocyte recruitment to a site of vascular injury. This interaction is mediated at least in part by the beta2-integrin Mac-1 (CD11b/CD18) and its counter-receptor on platelets, glycoprotein Ibalpha (GPIbalpha). High molecular weight kininogen (HK) was previously shown to interact with both GPIbalpha and Mac-1 through its domains 3 and 5, respectively. In this study we investigated the ability of HK to interfere with the leukocyte-platelet interaction. In a purified system, HK binding to GPIbalpha was inhibited by HK domain 3 and the monoclonal antibody (mAb) SZ2, directed against the epitope 269-282 of GPIbalpha, whereas mAb AP1, directed to the region 201-268 of GPIbalpha had no effect. In contrast, mAb AP1 inhibited the Mac-1-GPIbalpha interaction. Binding of GPIbalpha to Mac-1 was enhanced 2-fold by HK. This effect of HK was abrogated in the presence of HK domains 3 or 5 or peptides from the 475-497 region of the carboxyl terminus of domain 5 as well as in the presence of mAb SZ2 but not mAb AP1. Whereas no difference in the affinity of the Mac-1-GPIbalpha interaction was observed in the absence or presence of HK, maximal binding of GPIbalpha to Mac-1 doubled in the presence of HK. Moreover, HK/HKa increased the Mac-1-dependent adhesion of myelomonocytic U937 cells and K562 cells transfected with Mac-1 to immobilized GPIbalpha or to GPIbalpha-transfected Chinese hamster ovary cells. Finally, Mac-1-dependent adhesion of neutrophils to surface-adherent platelets was enhanced by HK. Thus, HK can bridge leukocytes with platelets by interacting via its domain 3 with GPIbalpha and via its domain 5 with Mac-1 thereby augmenting the Mac-1-GPIbalpha interaction. These distinct molecular interactions of HK with leukocytes and platelets contribute to the regulation of the adhesive behavior of vascular cells and provide novel molecular targets for reducing atherothrombotic pathologies.
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Jurk K, Clemetson KJ, de Groot PG, Brodde MF, Steiner M, Savion N, Varon D, Sixma JJ, Van Aken H, Kehrel BE. Thrombospondin-1 mediates platelet adhesion at high shear via glycoprotein Ib (GPIb): an alternative/backup mechanism to von Willebrand factor. FASEB J 2003; 17:1490-2. [PMID: 12824298 DOI: 10.1096/fj.02-0830fje] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Acute thrombotic arterial occlusion is the leading cause of morbidity and mortality in the Western world. Von Willebrand factor is thought to be the only indispensable adhesive substrate to promote thrombus formation in high shear environments. We found that thrombospondin-1, a glycoprotein enriched in arteriosclerotic plaques, might function as an alternative substrate for thrombus formation. Platelets adhered to thrombospondin-1 in a shear dependent manner with an optimum shear as found in stenosed arteries. Adhesion is extremely firm, with no detachment of platelets up to a shear rate of 4000 s(-1). Experiments using platelets from a patient completely lacking von Willebrand factor showed that von Willebrand factor is not involved in platelet binding to thrombospondin-1. Platelet adhesion to thrombospondin-1 is not mediated via beta3-integrins or GPIa. CD36 partially mediates the adhesion of pre-activated platelets. We identified GPIb as high shear adhesion-receptor for thrombospondin-1. Soluble GPIb, as well as antibodies against the GPIb, blocked platelet adhesion almost completely. The new discovered thrombospondin-1-GPIb adhesion axis under arterial shear conditions might be important, not only during thrombus formation but also for pathological processes where other cells bind to the endothelium or subendothelium, including arteriosclerosis, inflammation and tumor metastasis, and a promising therapeutic target.
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Affiliation(s)
- Kerstin Jurk
- Department of Anaesthesiology and Intensive Care, Experimental and Clinical Haemostasis, University-Hospital Münster, Mendelstr. 11, 48149 Münster, Germany
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Abstract
The absence or deficiency of specific platelet glycoprotein receptors has a well-defined role in causing several rare bleeding disorders such as Bernard-Soulier syndrome or Glanzmann's thrombasthenia. Several new rare disorders caused by defects in other receptors or their signalling pathways have recently been described. Platelet receptors are also often targets for antibodies in pathological conditions. The roles of platelet receptors or their polymorphism variants in diseases such as cardiovascular disorders have started to be intensively investigated over the last 5 years. Many of these findings still remain controversial. Recent evidence points to a fundamental role for platelets and their receptors in the origins of atherosclerosis. Studies on the role of platelet receptors in diseases such as asthma, diabetes and HIV are still at an early stage.
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