Abstract
We found that the interaction of platelets with immobilized von Willebrand factor (VWF) under flow induces distinct elevations of cytosolic Ca++ concentration ([Ca++]i) that are associated with sequential stages of integrin αIIbβ3 activation. Fluid-dynamic conditions that are compatible with the existence of tensile stress on the bonds between glycoprotein Ibα (GPIbα) and the VWF A1 domain led to Ca++ release from intracellular stores (type α/β peaks), which preceded stationary platelet adhesion. Raised levels of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate, as well as membrane-permeable calcium chelators, inhibited these [Ca++]ioscillations and prevented stable adhesion without affecting the dynamic characteristics of the typical platelet translocation on VWF mediated by GPIbα. Once adhesion was established through the integrin αIIbβ3, new [Ca++]i oscillations (type γ) of greater amplitude and duration, and involving a transmembrane ion flux, developed in association with the recruitment of additional platelets into aggregates. Degradation of released adenosine diphosphate (ADP) to AMP or inhibition of phosphatidylinositol 3-kinase (PI3-K) prevented this response without affecting stationary adhesion and blocked aggregation. These findings indicate that an initial signal induced by stressed GPIbα-VWF bonds leads to αIIbβ3 activation sufficient to support localized platelet adhesion. Then, additional signals from ADP receptors and possibly ligand-occupied αIIbβ3, with the contribution of a pathway involving PI3-K, amplify platelet activation to the level required for aggregation. Our conclusions modify those proposed by others regarding the mechanisms that regulate signaling between GPIbα and αIIbβ3 and lead to platelet adhesion and aggregation on immobilized VWF.
References
40
Referenced
147
{'key': '2019111821325920300_B1', 'first-page': '1', 'article-title': 'Platelets, hemostasis and thrombosis.', 'volume-title': 'Von Willebrand Factor and the Mechanisms of Platelet Function.', 'author': 'Ruggeri', 'year': '1998'}
/ Von Willebrand Factor and the Mechanisms of Platelet Function. / Platelets, hemostasis and thrombosis. by Ruggeri (1998)10.1056/NEJM199201233260406
/ N Engl J Med. / The pathogenesis of coronary artery disease and the acute coronary syndromes (1). by Fuster (1992)10.1056/NEJM199201303260506
/ N Engl J Med. / The pathogenesis of coronary artery disease and the acute coronary syndromes (2). by Fuster (1992)10.1016/S0092-8674(00)81607-4
/ Cell. / Specific synergy of multiple substrate-receptor interactions in platelet thrombus formation under flow. by Savage (1998)10.1016/S0092-8674(00)80983-6
/ Cell. / Initiation of platelet adhesion by arrest onto fibrinogen or translocation on von Willebrand factor. by Savage (1996)10.1182/blood.V94.1.172.413k17_172_178
/ Blood. / Contribution of distinct adhesive interactions to platelet aggregation in flowing blood. by Ruggeri (1999)10.1073/pnas.82.21.7424
/ Proc Natl Acad Sci U S A. / Interaction of purified IIB von Willebrand factor with the platelet membrane glycoprotein Ib induces fibrinogen binding to the glycoprotein IIb/IIIa complex and initiates aggregation. by De Marco (1985)10.1172/JCI113095
/ J Clin Invest. / Type IIB von Willebrand factor with normal sialic acid content induces platelet aggregation in the absence of ristocetin: role of platelet activation, fibrinogen, and two distinct membrane receptors. by De Marco (1987)10.1182/blood.V80.1.113.113
/ Blood. / Shear stress-induced von Willebrand factor binding to platelet glycoprotein Ib initiates calcium influx associated with aggregation. by Chow (1992)10.1055/s-0038-1651640
/ Thromb Haemost. / Transmembrane calcium influx associated with von Willebrand factor binding to GP Ib in the initiation of shear-induced platelet aggregation. by Ikeda (1993)10.1182/blood.V94.4.1149
/ Blood. / Cytosolic calcium changes in a process of platelet adhesion and cohesion on a von Willebrand factor-coated surface under flow conditions. by Kuwahara (1999)10.1074/jbc.M005590200
/ J Biol Chem. / Synergistic adhesive interactions and signaling mechanisms operating between platelet glycoprotein Ib/IX and integrin αIIbβ3: studies in human platelets and transfected Chinese hamster ovary cells. by Yap (2000)10.1074/jbc.M110070200
/ J Biol Chem. / Distinct glycoprotein Ib/V/IX and integrin αIIbβ3-dependent calcium signals cooperatively regulate platelet adhesion under flow. by Nesbitt (2002)10.1016/0092-8674(91)90393-D
/ Cell. / Leukocytes roll on a selectin at physiologic flow rates: distinction from and prerequisite for adhesion through integrins. by Lawrence (1991)10.1182/blood.V99.1.151
/ Blood. / Essential role for phosphoinositide 3-kinase in shear-dependent signaling between platelet glycoprotein Ib/V/IX and integrin αIIbβ3. by Yap (2002)10.1042/bj2690513
/ Biochem J. / Use of fluo-3 to measure cytosolic Ca2+ in platelets and neutrophils: loading cells with the dye, calibration of traces, measurements in the presence of plasma, and buffering of cytosolic Ca2+. by Merritt (1990)10.1074/jbc.274.10.6586
/ J Biol Chem. / Distinct structural attributes regulating von Willebrand factor A1 domain interaction with platelet glycoprotein Ibα under flow. by Miyata (1999)10.1016/S0021-9258(18)67128-5
/ J Biol Chem. / The von Willebrand factor-binding domain of platelet membrane glycoprotein Ib: characterization by monoclonal antibodies and partial amino acid sequence analysis of proteolytic fragments. by Handa (1986)10.1182/blood.V70.2.475.475
/ Blood. / Increased surface expression of the membrane glycoprotein IIb/IIIa complex induced by platelet activation: relationship to the binding of fibrinogen and platelet aggregation. by Niiya (1987)10.1055/s-0037-1615861
/ Thromb Haemost. / Cyclic nucleotides and phosphodiesterases in platelets. by Haslam (1999)10.1016/S1367-5931(98)80123-3
/ Curr Opin Chem Biol. / Chemotherapeutic potential of phosphodiesterase inhibitors. by Perry (1998)10.1007/BF02285104
/ Eur J Clin Pharmacol. / Correlation between theophylline concentration in plasma, erythrocytes and cantharides induces blister fluid and peak expiratory flow in asthma patients. by Philip-Joet (1992)10.1074/jbc.274.5.3033
/ J Biol Chem. / Identification of domains responsible for von Willebrand factor type VI collagen interaction mediating platelet adhesion under high flow. by Mazzucato (1999)10.1016/S0021-9258(19)37004-8
/ J Biol Chem. / Identification of a region in the cytoplasmic domain of the platelet membrane glycoprotein Ib-IX complex that binds to purified actin-binding protein. by Andrews (1992)10.1074/jbc.271.19.11581
/ J Biol Chem. / The cytoplasmic domain of the α-subunit of glycoprotein (GP) Ib mediates attachment of the entire GP Ib-IX complex to the cytoskeleton and regulates von Willebrand factor-induced changes in cell morphology. by Cunningham (1996)10.1074/jbc.271.13.7362
/ J Biol Chem. / Identification of a binding sequence for the 14-3-3 protein within the cytoplasmic domain of the adhesion receptor, platelet glycoprotein Ibα. by Du (1996)10.1146/annurev.pharmtox.40.1.617
/ Annu Rev Pharmacol Toxicol. / 14-3-3 proteins: structure, function, and regulation. by Fu (2000)10.1074/jbc.275.22.16779
/ J Biol Chem. / Signaling across the platelet adhesion receptor glycoprotein Ib-IX induces αIIbβ3 activation both in platelets and a transfected Chinese hamster ovary cell system. by Zaffran (2000)10.1038/361315a0
/ Nature. / Inositol triphosphate and calcium signalling. by Berridge (1993)10.1016/0006-291X(90)91271-S
/ Biochem Biophys Res Commun. / Shear stress increases inositol trisphosphate levels in human endothelial cells. by Nollert (1990)10.1159/000158963
/ J Vasc Res. / Fluid shear stress stimulates membrane phospholipid metabolism in cultured human endothelial cells. by Bhagyalakshmi (1992)10.1152/ajpcell.2000.278.5.C989
/ Am J Physiol Cell Physiol. / Ca2+ regulates fluid shear-induced cytoskeletal reorganization and gene expression in osteoblasts. by Chen (2000)10.1182/blood.V71.5.1366.bloodjournal7151366
/ Blood. / Shear-induced platelet aggregation can be mediated by vWF released from platelets, as well as by exogenous large or unusually large vWF multimers, requires adenosine diphosphate, and is resistant to aspirin. by Moake (1988)10.1182/blood.V98.12.3340
/ Blood. / Blockade of adenosine diphosphate receptors P2Y12 and P2Y1 is required to inhibit platelet aggregation in whole blood under flow. by Turner (2001)10.1016/S0021-9258(18)47130-X
/ J Biol Chem. / Adhesion receptor activation of phosphatidylinositol 3-kinase: von Willebrand factor stimulates the cytoskeletal association and activation of phosphatidylinositol 3-kinase and pp60c-src in human platelets. by Jackson (1994){'key': '2019111821325920300_B36', 'first-page': '15', 'article-title': 'Platelet activation by ADP: the role of ADP antagonists.', 'volume': '32(suppl 1)', 'author': 'Gachet', 'year': '2000', 'journal-title': 'Ann Med.'}
/ Ann Med. / Platelet activation by ADP: the role of ADP antagonists. by Gachet (2000)10.1016/S0021-9258(18)89543-6
/ J Biol Chem. / Ca2+ transport across the platelet plasma membrane: a role for membrane glycoproteins IIb and IIIa. by Brass (1985)10.1074/jbc.275.13.9110
/ J Biol Chem. / Phosphoinositides are required for store-mediated calcium entry in human platelets. by Rosado (2000)10.1016/0014-5793(96)00130-5
/ FEBS Lett. / Wortmannin inhibits store-mediated calcium entry and protein tyrosine phosphorylation in human platelets. by Jenner (1996)10.1182/blood.V96.10.3322.h8003322_3322_3328
/ Blood. / Platelets adhere to and translocate on von Willebrand factor presented by endothelium in stimulated veins. by André (2000)
Dates
Type | When |
---|---|
Created | 22 years, 11 months ago (Sept. 26, 2002, 7:44 p.m.) |
Deposited | 4 years, 2 months ago (May 28, 2021, 2:01 a.m.) |
Indexed | 2 days, 11 hours ago (Aug. 24, 2025, 7:01 p.m.) |
Issued | 22 years, 10 months ago (Oct. 15, 2002) |
Published | 22 years, 10 months ago (Oct. 15, 2002) |
Published Print | 22 years, 10 months ago (Oct. 15, 2002) |
@article{Mazzucato_2002, title={Sequential cytoplasmic calcium signals in a 2-stage platelet activation process induced by the glycoprotein Ibα mechanoreceptor}, volume={100}, ISSN={0006-4971}, url={http://dx.doi.org/10.1182/blood-2002-02-0514}, DOI={10.1182/blood-2002-02-0514}, number={8}, journal={Blood}, publisher={American Society of Hematology}, author={Mazzucato, Mario and Pradella, Paola and Cozzi, Maria Rita and De Marco, Luigi and Ruggeri, Zaverio M.}, year={2002}, month=oct, pages={2793–2800} }