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Kenny M, Pollitt AY, Patil S, Hiebner DW, Smolenski A, Lakic N, Fisher R, Alsufyani R, Lickert S, Vogel V, Schoen I. Contractility defects hinder glycoprotein VI-mediated platelet activation and affect platelet functions beyond clot contraction. Res Pract Thromb Haemost 2024; 8:102322. [PMID: 38379711 PMCID: PMC10877441 DOI: 10.1016/j.rpth.2024.102322] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 12/23/2023] [Accepted: 01/03/2024] [Indexed: 02/22/2024] Open
Abstract
Background Active and passive biomechanical properties of platelets contribute substantially to thrombus formation. Actomyosin contractility drives clot contraction required for stabilizing the hemostatic plug. Impaired contractility results in bleeding but is difficult to detect using platelet function tests. Objectives To determine how diminished myosin activity affects platelet functions, including and beyond clot contraction. Methods Using the myosin IIA-specific pharmacologic inhibitor blebbistatin, we modulated myosin activity in platelets from healthy donors and systematically characterized platelet responses at various levels of inhibition by interrogating distinct platelet functions at each stage of thrombus formation using a range of complementary assays. Results Partial myosin IIA inhibition neither affected platelet von Willebrand factor interactions under arterial shear nor platelet spreading and cytoskeletal rearrangements on fibrinogen. However, it impacted stress fiber formation and the nanoarchitecture of cell-matrix adhesions, drastically reducing and limiting traction forces. Higher blebbistatin concentrations impaired platelet adhesion under flow, altered mechanosensing at lamellipodia edges, and eliminated traction forces without affecting platelet spreading, α-granule secretion, or procoagulant platelet formation. Unexpectedly, myosin IIA inhibition reduced calcium influx, dense granule secretion, and platelet aggregation downstream of glycoprotein (GP)VI and limited the redistribution of GPVI on the cell membrane, whereas aggregation induced by adenosine diphosphate or arachidonic acid was unaffected. Conclusion Our findings highlight the importance of both active contractile and passive crosslinking roles of myosin IIA in the platelet cytoskeleton. They support the hypothesis that highly contractile platelets are needed for hemostasis and further suggest a supportive role for myosin IIA in GPVI signaling.
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Affiliation(s)
- Martin Kenny
- School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Alice Y. Pollitt
- School of Biological Sciences, University of Reading, Reading, United Kingdom
| | - Smita Patil
- School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Dishon W. Hiebner
- School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Albert Smolenski
- School of Medicine, Conway Institute, University College Dublin, Belfield, Dublin, Ireland
| | - Natalija Lakic
- School of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Robert Fisher
- School of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Reema Alsufyani
- School of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Sebastian Lickert
- Department of Health Sciences and Technologies, ETH Zurich, Zurich, Switzerland
| | - Viola Vogel
- Department of Health Sciences and Technologies, ETH Zurich, Zurich, Switzerland
| | - Ingmar Schoen
- School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, Dublin, Ireland
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2
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Oglesby IK, Slattery D, Glynn N, Gupta S, Duggan K, Cuesta M, Dunne E, Garrahy A, Toner S, Kenny D, Agha A. The modulation of platelet function by growth hormone in growth hormone deficient Hypopituitary patients. BMC Endocr Disord 2023; 23:197. [PMID: 37705005 PMCID: PMC10500895 DOI: 10.1186/s12902-023-01448-6] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 08/31/2023] [Indexed: 09/15/2023] Open
Abstract
BACKGROUND Growth hormone deficiency (GHD) has been implicated in increased cardiovascular and cerebrovascular disease risk seen in hypopituitarism, however the mechanism remains speculative. We hypothesise that platelet abnormalities may play a contributory role. Herein we examined platelet behaviour in GHD hypopituitary patients, pre- and post-growth hormone (GH) replacement. METHODS This study utilizes a physiological flow-based assay to quantify platelet function in whole blood from patient cohorts under arterial shear. Thirteen GH Naïve hypopituitary adults with GHD and thirteen healthy matched controls were studied. Patients were assessed before and after GH treatment. All other pituitary replacements were optimised before the study. In addition to a full endocrine profile, whole blood was labelled and perfused over immobilised von Willibrand factor (vWF). Seven parameters of dynamic platelet-vWF interactions were recorded using digital image microscopy and analysed by customised platelet tracking software. RESULTS We found a significantly altered profile of platelet-vWF interactions in GHD individuals compared to healthy controls. Specifically, we observed a marked increase in platelets shown to form associations such as tethering, rolling and adherence to immobilized vWF, which were reduced post GH treatment. Speed and distance platelets travelled across vWF was similar between controls and pre-therapy GHD patients, however, this was considerably increased post treatment. This may indicate reduced platelet signaling resulting in less stable adhesion of platelets post GH treatment. CONCLUSIONS Taken together observed differences in platelet behaviour may contribute to an increased risk of thrombosis in GHD which can in part be reversed by GH therapy.
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Affiliation(s)
- Irene K Oglesby
- Irish Centre for Vascular Biology and Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland
- Department of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - David Slattery
- Department of Endocrinology, Beaumont Hospital, Dublin 9, Dublin, Ireland
| | - Nigel Glynn
- Department of Endocrinology, Beaumont Hospital, Dublin 9, Dublin, Ireland
| | - Saket Gupta
- Department of Endocrinology, Beaumont Hospital, Dublin 9, Dublin, Ireland
| | - Karen Duggan
- Department of Endocrinology, Beaumont Hospital, Dublin 9, Dublin, Ireland
| | - Martin Cuesta
- Department of Endocrinology, Beaumont Hospital, Dublin 9, Dublin, Ireland
| | - Eimear Dunne
- Irish Centre for Vascular Biology and Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Aoife Garrahy
- Department of Endocrinology, Beaumont Hospital, Dublin 9, Dublin, Ireland
| | - Siobhan Toner
- Department of Endocrinology, Beaumont Hospital, Dublin 9, Dublin, Ireland
| | - Dermot Kenny
- Irish Centre for Vascular Biology and Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Amar Agha
- Department of Endocrinology, Beaumont Hospital, Dublin 9, Dublin, Ireland.
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3
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Ward J, Dunne E, Schoen I, Boyd AR, Kenny D, Meenan BJ. Nanotopography of Polystyrene/Poly(methyl methacrylate) for the Promotion of Patient Specific Von Willebrand Factor Entrapment and Platelet Adhesion in a Whole Blood Microfluidic Assay. Polymers (Basel) 2023; 15:polym15061580. [PMID: 36987359 PMCID: PMC10054393 DOI: 10.3390/polym15061580] [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] [Received: 01/30/2023] [Revised: 03/10/2023] [Accepted: 03/19/2023] [Indexed: 03/30/2023] Open
Abstract
Platelet function testing is essential for the diagnosis of patients with bleeding disorders. Specifically, there is a need for a whole blood assay that is capable of analysing platelet behaviour in contact with a patient-specific autologous von Willebrand factor (vWF), under physiologically relevant conditions. The creation of surface topography capable of entrapping and uncoiling vWF for the support of subsequent platelet adhesion within the same blood sample offers a potential basis for such an assay. In this study, spin coating of polystyrene/poly (methyl methacrylate) (PS/PMMA) demixed solutions onto glass substrates in air has been used to attain surfaces with well-defined topographical features. The effect of augmenting the PS/PMMA solution with uniform 50 µm PS microspheres that can moderate the demixing process on the resultant surface features has also been investigated. The topographical features created here by spin coating under ambient air pressure conditions, rather than in nitrogen, which previous work reports, produces substrate surfaces with the ability to entrap vWF from flowing blood and facilitate platelet adhesion. The direct optical visualisation of fluorescently-labelled platelets indicates that topography resulting from inclusion of PS microspheres in the PS/PMMA spin coating solution increases the total number of platelets that adhere to the substrate surface over the period of the microfluidic assay. However, a detailed analysis of the adhesion rate, mean translocating velocity, mean translocation distance, and fraction of the stably adhered platelets measured during blood flow under arterial equivalent mechanical shear conditions indicates no significant difference for topographies created with or without inclusion of the PS microspheres.
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Affiliation(s)
- Joanna Ward
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, Ulster University, York Street, Belfast BT15 1AP, UK
| | - Eimear Dunne
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, D02 YN77 Dublin, Ireland
| | - Ingmar Schoen
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, D02 YN77 Dublin, Ireland
| | - Adrian R Boyd
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, Ulster University, York Street, Belfast BT15 1AP, UK
| | - Dermot Kenny
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, D02 YN77 Dublin, Ireland
| | - Brian J Meenan
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, Ulster University, York Street, Belfast BT15 1AP, UK
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4
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Soddu L, Trinh DN, Dunne E, Kenny D, Bernardini G, Kokalari I, Marucco A, Monopoli MP, Fenoglio I. Identification of physicochemical properties that modulate nanoparticle aggregation in blood. Beilstein J Nanotechnol 2020; 11:550-567. [PMID: 32280579 PMCID: PMC7136551 DOI: 10.3762/bjnano.11.44] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 02/28/2020] [Indexed: 05/05/2023]
Abstract
Inorganic materials are receiving significant interest in medicine given their usefulness for therapeutic applications such as targeted drug delivery, active pharmaceutical carriers and medical imaging. However, poor knowledge of the side effects related to their use is an obstacle to clinical translation. For the development of molecular drugs, the concept of safe-by-design has become an efficient pharmaceutical strategy with the aim of reducing costs, which can also accelerate the translation into the market. In the case of materials, the application these approaches is hampered by poor knowledge of how the physical and chemical properties of the material trigger the biological response. Hemocompatibility is a crucial aspect to take into consideration for those materials that are intended for medical applications. The formation of nanoparticle agglomerates can cause severe side effects that may induce occlusion of blood vessels and thrombotic events. Additionally, nanoparticles can interfere with the coagulation cascade causing both pro- and anti-coagulant properties. There is contrasting evidence on how the physicochemical properties of the material modulate these effects. In this work, we developed two sets of tailored carbon and silica nanoparticles with three different diameters in the 100-500 nm range with the purpose of investigating the role of surface curvature and chemistry on platelet aggregation, activation and adhesion. Substantial differences were found in the composition of the protein corona depending on the chemical nature of the nanoparticles, while the surface curvature was found to play a minor role. On the other hand, large carbon nanoparticles (but not small carbon nanoparticles or silica nanoparticles) have a clear tendency to form aggregates both in plasma and blood. This effect was observed both in the presence or absence of platelets and was independent of platelet activation. Overall, the results presented herein suggest the existence of independent modes of action that are differently affected by the physicochemical properties of the materials, potentially leading to vessel occlusion and/or formation of thrombi in vivo.
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Affiliation(s)
- Ludovica Soddu
- Department of Chemistry, University of Torino, 10125 Torino, Italy
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Duong N Trinh
- Department of Chemistry, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Eimear Dunne
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Dermot Kenny
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Giorgia Bernardini
- Department of Chemistry, University of Torino, 10125 Torino, Italy
- Department of Chemistry, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Ida Kokalari
- Department of Chemistry, University of Torino, 10125 Torino, Italy
| | - Arianna Marucco
- Department of Chemistry, University of Torino, 10125 Torino, Italy
| | - Marco P Monopoli
- Department of Chemistry, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Ivana Fenoglio
- Department of Chemistry, University of Torino, 10125 Torino, Italy
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5
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Dunne E, Qi QM, Shaqfeh ES, O'Sullivan JM, Schoen I, Ricco AJ, O'Donnell JS, Kenny D. Blood group alters platelet binding kinetics to von Willebrand factor and consequently platelet function. Blood 2019; 133:1371-7. [PMID: 30642918 DOI: 10.1182/blood-2018-06-855528] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 01/03/2019] [Indexed: 01/29/2023] Open
Abstract
Blood type O is associated with a lower risk of myocardial infarction. Platelets play a critical role in myocardial infarction. It is not known whether the expression of blood group antigens on platelet proteins alters platelet function; we hypothesized that platelet function would be different between donors with blood type O and those with non-O. To address this hypothesis, we perfused blood from healthy type O donors (n = 33) or non-O donors (n = 54) over pooled plasma derived von Willebrand factor (VWF) protein and purified blood type-specific VWF at arterial shear and measured platelet translocation dynamics. We demonstrate for the first time that type O platelets travel farther at greater speeds before forming stable bonds with VWF. To further characterize these findings, we used a novel analytical model of platelet interaction. Modeling revealed that the kinetics for GPIb/VWF binding rate are significantly lower for type O compared with non-O platelets. Our results demonstrate that platelets from type O donors interact less with VWF at arterial shear than non-O platelets. Our results suggest a potential mechanism for the reduced risk of myocardial infarction associated with blood type O.
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6
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Kennedy C, Wong L, Sexton DJ, Cowman J, Oglesby I, Kenny M, Conlon PJ, Kenny D. Successful kidney transplantation normalizes platelet function. Clin Kidney J 2018; 11:574-580. [PMID: 30087773 PMCID: PMC6070122 DOI: 10.1093/ckj/sfx148] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 11/27/2017] [Indexed: 12/23/2022] Open
Abstract
Background Uraemic platelet dysfunction is not completely understood, in part due to non-physiological platelet function assays. We have developed a physiological flow-based assay that quantifies platelet function in microlitre volumes of blood under arterial shear. The aim of this study was to characterize platelet function before and after kidney transplantation. Methods Ten patients scheduled for living donor kidney transplant surgery and nine healthy controls were analysed using the assay. The motional parameters of platelet behaviour on von Willebrand factor (VWF) were recorded using customized platelet tracking software. The assay was repeated 3–8 weeks post-transplant in the transplant group and at an interval of >3 weeks in normal healthy volunteers. Results Platelet–VWF interactions were markedly reduced in the 10 pre-transplant patients compared with the healthy controls. In seven patients with immediate graft function, dynamic platelet function returned to normal (despite a small decrease in haemoglobin and haematocrit), but remained markedly abnormal in the three patients with delayed graft function (DGF). Conclusions Dynamic platelet function returned to normal following transplantation in those with immediate graft function. This early improvement was not observed in those with DGF. There may be important clinical implications, as patients with DGF are more likely to undergo invasive procedures, including transplant biopsies and insertion of central venous catheters.
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Affiliation(s)
- Claire Kennedy
- Department of Nephrology, Beaumont Hospital, Dublin, Ireland.,Department of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Limy Wong
- Department of Nephrology, Beaumont Hospital, Dublin, Ireland
| | - Donal J Sexton
- Department of Nephrology, Beaumont Hospital, Dublin, Ireland
| | - Jonathan Cowman
- Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland.,Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Irene Oglesby
- Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Martin Kenny
- Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Peter J Conlon
- Department of Nephrology, Beaumont Hospital, Dublin, Ireland.,Department of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Dermot Kenny
- Department of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland.,Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, Dublin, Ireland
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7
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Cowman J, Müllers S, Dunne E, Ralph A, Ricco AJ, Malone FD, Kenny D. Platelet behaviour on von Willebrand Factor changes in pregnancy: Consequences of haemodilution and intrinsic changes in platelet function. Sci Rep 2017; 7:6354. [PMID: 28743915 PMCID: PMC5527092 DOI: 10.1038/s41598-017-06959-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 05/18/2017] [Accepted: 06/19/2017] [Indexed: 12/16/2022] Open
Abstract
Platelet function in pregnancy is poorly understood. Previous studies of platelet function in pregnancy have used non-physiological assays of platelet function with conflicting results. This study using a physiological assay of platelet function investigated platelet interactions with von Willebrand Factor (VWF) in blood from healthy pregnant women and healthy non-pregnant controls. Blood samples (200 µl) from third-trimester pregnancies (n = 21) and non-pregnant controls (n = 21) were perfused through custom-made parallel-plate flow chambers coated with VWF under arterial shear (1,500 s−1). Multi-parameter measurements of platelet interactions with the immobilized VWF surface were recorded by digital-image microscopy and analysed using custom-designed platelet-tracking software. Platelet interactions with VWF decreased in healthy third-trimester pregnant participants relative to controls. This effect is most likely due to haemodilution which occurs physiologically during pregnancy. Interestingly, platelets in blood from pregnant participants translocated more slowly on VWF under arterial-shear conditions. These decreases in platelet translocation speed were independent of haemodilution, suggesting intrinsic changes in platelet function with pregnancy.
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Affiliation(s)
- Jonathan Cowman
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Sieglinde Müllers
- Obstetrics and Gynecology, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Eimear Dunne
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Adam Ralph
- Irish Centre for High-end Computing, National University, Ireland, Galway, Ireland
| | - Antonio J Ricco
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Fergal D Malone
- Obstetrics and Gynecology, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Dermot Kenny
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin, Ireland.
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