1
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Cahalane RME, Cruts JMH, van Beusekom HMM, de Maat MPM, Dijkshoorn M, van der Lugt A, Gijsen FJH. Contribution of Red Blood Cells and Platelets to Blood Clot Computed Tomography Imaging and Compressive Mechanical Characteristics. Ann Biomed Eng 2024; 52:2151-2161. [PMID: 38664333 PMCID: PMC11247058 DOI: 10.1007/s10439-024-03515-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 04/06/2024] [Indexed: 07/16/2024]
Abstract
Thrombus computed tomography (CT) imaging characteristics may correspond with thrombus mechanical properties and thus predict thrombectomy success. The impact of red blood cell (RBC) content on these properties (imaging and mechanics) has been widely studied. However, the additional effect of platelets has not been considered. The objective of the current study was to examine the individual and combined effects of blood clot RBC and platelet content on resultant CT imaging and mechanical characteristics. Human blood clot analogues were prepared from a combination of preselected RBC volumes and platelet concentrations to decouple their contributions. The resulting clot RBC content (%) and platelet content (%) were determined using Martius Scarlet Blue and CD42b staining, respectively. Non-contrast and contrast-enhanced CT (NCCT and CECT) scans were performed to measure the clot densities. CECT density increase was taken as a proxy for clinical perviousness. Unconfined compressive mechanics were analysed by performing 10 cycles of 80% strain. RBC content is the major determinant of clot NCCT density. However, additional consideration of the platelet content improves the association. CECT density increase is influenced by clot platelet and not RBC content. Platelet content is the dominant component driving clot stiffness, especially at high strains. Both RBC and platelet content contribute to the clot's viscoelastic and plastic compressive properties. The current in vitro results suggest that CT density is reflective of RBC content and subsequent clot viscoelasticity and plasticity, and that perviousness reflects the clot's platelet content and subsequent stiffness. However, these indications should be confirmed in a clinical stroke cohort.
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Affiliation(s)
- Rachel M E Cahalane
- Department of Biomedical Engineering, Thoraxcenter, Erasmus MC, Rotterdam, The Netherlands
| | - Janneke M H Cruts
- Department of Biomedical Engineering, Thoraxcenter, Erasmus MC, Rotterdam, The Netherlands
| | | | - Moniek P M de Maat
- Department of Hematology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Marcel Dijkshoorn
- Department of Radiology and Nuclear Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Aad van der Lugt
- Department of Radiology and Nuclear Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Frank J H Gijsen
- Department of Biomedical Engineering, Thoraxcenter, Erasmus MC, Rotterdam, The Netherlands.
- Department of Biomechanical Engineering, Delft University of Technology, Delft, The Netherlands.
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2
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Huang Y, Wang J, Guo Y, Shen L, Li Y. Fibrinogen binding to activated platelets and its biomimetic thrombus-targeted thrombolytic strategies. Int J Biol Macromol 2024; 274:133286. [PMID: 38908635 DOI: 10.1016/j.ijbiomac.2024.133286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 06/18/2024] [Accepted: 06/18/2024] [Indexed: 06/24/2024]
Abstract
Thrombosis is associated with various fatal arteriovenous syndromes including ischemic stroke, myocardial infarction, and pulmonary embolism. However, current clinical thrombolytic treatment strategies still have many problems in targeting and safety to meet the thrombolytic therapy needs. Understanding the molecular mechanism that underlies thrombosis is critical in developing effective thrombolytic strategies. It is well known that platelets play a central role in thrombosis and the binding of fibrinogen to activated platelets is a common pathway in the process of clot formation. Based on this, a concept of biomimetic thrombus-targeted thrombolytic strategy inspired from fibrinogen binding to activated platelets in thrombosis was proposed, which could selectively bind to activated platelets at a thrombus site, thus enabling targeted delivery and local release of thrombolytic agents for effective thrombolysis. In this review, we first summarized the main characteristics of platelets and fibrinogen, and then introduced the classical molecular mechanisms of thrombosis, including platelet adhesion, platelet activation and platelet aggregation through the interactions of activated platelets with fibrinogen. In addition, we highlighted the recent advances in biomimetic thrombus-targeted thrombolytic strategies which inspired from fibrinogen binding to activated platelets in thrombosis. The possible future directions and perspectives in this emerging area are briefly discussed.
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Affiliation(s)
- Yu Huang
- Department of Radiology, Shanghai Jiao Tong University School of Medicine Affiliated Shanghai Sixth People's Hospital, 600 Yi Shan Road, Shanghai 200233, PR China.
| | - Jiahua Wang
- Department of Radiology, Shanghai Jiao Tong University School of Medicine Affiliated Shanghai Sixth People's Hospital, 600 Yi Shan Road, Shanghai 200233, PR China
| | - Yuanyuan Guo
- Department of Radiology, Shanghai Jiao Tong University School of Medicine Affiliated Shanghai Sixth People's Hospital, 600 Yi Shan Road, Shanghai 200233, PR China
| | - Lingyue Shen
- Department of Oral & Maxillofacial-Head & Neck Oncology, Department of Laser and Aesthetic Medicine, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stoma-tology & Shanghai Research Institute of Stomatology, 639 Zhizaoju Road, Shanghai 200011, PR China.
| | - Yuehua Li
- Department of Radiology, Shanghai Jiao Tong University School of Medicine Affiliated Shanghai Sixth People's Hospital, 600 Yi Shan Road, Shanghai 200233, PR China.
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3
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Adair BD, Field CO, Alonso JL, Xiong JP, Deng SX, Ahn HS, Mashin E, Clish CB, van Agthoven J, Yeager M, Guo Y, Tess DA, Landry DW, Poncz M, Arnaout MA. Platelet integrin αIIbβ3 plays a key role in venous thrombogenesis in a mouse model. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.11.602533. [PMID: 39026880 PMCID: PMC11257514 DOI: 10.1101/2024.07.11.602533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Venous thrombosis (VT) is a common vascular disease associated with reduced survival and a high recurrence rate. Previous studies have shown that the accumulation of platelets and neutrophils at sites of endothelial cell activation is a primary event in VT, but a role for platelet αIIbβ3 in the initiation of venous thrombosis has not been established. This task has been complicated by the increased bleeding linked to partial agonism of current αIIbβ3 inhibitory drugs such as tirofiban (Aggrastat ® ). Here, we show that m-tirofiban, an engineered version of tirofiban, is not a partial agonist of αIIbβ3. This is based on its cryo-EM structure in complex with human full-length αIIbβ3 and its inability to increase expression of an activation-sensitive epitope on platelet αIIbβ3. m-tirofiban abolished agonist-induced platelet aggregation ex vivo at concentrations that preserved clot retraction and markedly suppressed the accumulation of platelets, neutrophils, and fibrin on thrombin-activated endothelium in real-time using intravital microscopy in a mouse model of venous thrombogenesis. Unlike tirofiban, however, m-tirofiban did not increase bleeding at the thrombosis-inhibitory dose. These findings establish a key role for αIIbβ3 in the initiation of VT, provide a guiding principle for designing potentially safer inhibitors for other integrins, and suggest that pure antagonists of αIIbβ3 like m-tirofiban merit further consideration as potential thromboprophylaxis agents in patients at high-risk for VT and hemorrhage.
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4
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Thomas KA, Rassam RMG, Kar R, Dishong DM, Rahn KC, Fonseca R, Canas M, Aldana J, Afzal H, Bochicchio K, Neal MD, Bochicchio GV, Spinella PC, Shea SM. Trauma patients have reduced ex vivo flow-dependent platelet hemostatic capacity in a microfluidic model of vessel injury. PLoS One 2024; 19:e0304231. [PMID: 38985805 PMCID: PMC11236159 DOI: 10.1371/journal.pone.0304231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 05/09/2024] [Indexed: 07/12/2024] Open
Abstract
Trauma is the leading cause of death in individuals up to 45 years of age. Alterations in platelet function are a critical component of trauma-induced coagulopathy (TIC), yet these changes and the potential resulting dysfunction is incompletely understood. The lack of clinical assays available to explore platelet function in this patient population has hindered detailed understanding of the role of platelets in TIC. The objective of this study was to assess trauma patient ex vivo flow-dependent platelet hemostatic capacity in a microfluidic model. We hypothesized that trauma patients would have flow-regime dependent alterations in platelet function. Blood was collected from trauma patients with level I activations (N = 34) within 60 min of hospital arrival, as well as healthy volunteer controls (N = 10). Samples were perfused through a microfluidic model of injury at venous and arterial shear rates, and a subset of experiments were performed after incubation with fluorescent anti-CD41 to quantify platelets. Complete blood counts were performed as well as plasma-based assays to quantify coagulation times, fibrinogen, and von Willebrand factor (VWF). Exploratory correlation analyses were employed to identify relationships with microfluidic hemostatic parameters. Trauma patients had increased microfluidic bleeding times compared to healthy controls. While trauma patient samples were able to deposit a substantial amount of clot in the model injury site, the platelet contribution to microfluidic hemostasis was attenuated. Trauma patients had largely normal hematology and plasma-based coagulation times, yet had elevated D-Dimer and VWF. Venous microfluidic bleeding time negatively correlated with VWF, D-Dimer, and mean platelet volume (MPV), while arterial microfluidic bleeding time positively correlated with oxygenation. Arterial clot growth rate negatively correlated with red cell count, and positively with mean corpuscular volume (MCV). We observed changes in clot composition in trauma patient samples reflected by significantly diminished platelet contribution, which resulted in reduced hemostatic function in a microfluidic model of vessel injury. We observed a reduction in platelet clot contribution under both venous and arterial flow ex vivo in trauma patient samples. While our population was heterogenous and had relatively mild injury severity, microfluidic hemostatic parameters correlated with different patient-specific data depending on the flow setting, indicating potentially differential mechanistic pathways contributing to platelet hemostatic capacity in the context of TIC. These data were generated with the goal of identifying key features of platelet dysfunction in bleeding trauma patients under conditions of flow and to determine if these features correlate with clinically available metrics, thus providing preliminary surrogate markers of physiological platelet dysfunction to be further studied across larger cohorts. Future studies will continue to explore those relationships and further define mechanisms of TIC and their relationship with patient outcomes.
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Affiliation(s)
- Kimberly A Thomas
- Vitalant Research Institute, Denver, Colorado, United States of America
| | - Rassam M G Rassam
- Trauma and Transfusion Medicine Research Center (TTMRC), Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Ronit Kar
- Trauma and Transfusion Medicine Research Center (TTMRC), Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Devin M Dishong
- Trauma and Transfusion Medicine Research Center (TTMRC), Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Katelin C Rahn
- Trauma and Transfusion Medicine Research Center (TTMRC), Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Ricardo Fonseca
- Department of Surgery, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Melissa Canas
- Department of Surgery, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Jose Aldana
- Department of Surgery, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Hussain Afzal
- Department of Surgery, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Kelly Bochicchio
- Department of Surgery, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Matthew D Neal
- Trauma and Transfusion Medicine Research Center (TTMRC), Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Grant V Bochicchio
- Department of Surgery, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Philip C Spinella
- Trauma and Transfusion Medicine Research Center (TTMRC), Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Susan M Shea
- Trauma and Transfusion Medicine Research Center (TTMRC), Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
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5
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Stanton K, Philippou H, Ariëns RA. Ischaemic Stroke, Thromboembolism and Clot Structure. Neuroscience 2024; 550:3-10. [PMID: 38453129 DOI: 10.1016/j.neuroscience.2024.02.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 02/19/2024] [Accepted: 02/23/2024] [Indexed: 03/09/2024]
Abstract
Ischaemic stroke is a major cause of morbidity and mortality worldwide. Blood clotting and thromboembolism play a central role in the pathogenesis of ischaemic stroke. An increasing number of recent studies indicate changes in blood clot structure and composition in patients with ischaemic stroke. In this review, we aim to summarise and discuss clot structure, function and composition in ischaemic stroke, including its relationships with clinical diagnosis and treatment options such as thrombolysis and thrombectomy. Studies are summarised in which clot structure and composition is analysed both in vitro from patients' plasma samples and ex vivo in thrombi obtained through interventional catheter-mediated thrombectomy. Mechanisms that drive clot composition and architecture such as neutrophil extracellular traps and clot contraction are also discussed. We find that, while in vitro clot structure in plasma samples from ischaemic stroke patients are consistently altered, showing denser clots that are more resistant to fibrinolysis, current data on the composition and architecture of ex vivo clots obtained by thrombectomy are more variable. With the potential of advances in technologies underpinning both the imaging and retrieving of clots, we expect that future studies in this area will generate new data that is of interest for the diagnosis, optimal treatment strategies and clinical management of patients with ischaemic stroke.
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Affiliation(s)
- Katherine Stanton
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Helen Philippou
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Robert As Ariëns
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK.
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6
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Sugerman GP, Bechtel GN, Malinowska Z, Parekh SH, Rausch MK. Mechanical properties of clot made from human and bovine whole blood differ significantly. J Mech Behav Biomed Mater 2024; 154:106508. [PMID: 38513312 DOI: 10.1016/j.jmbbm.2024.106508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 02/24/2024] [Accepted: 03/13/2024] [Indexed: 03/23/2024]
Abstract
Thromboembolism - that is, clot formation and the subsequent fragmentation of clot - is a leading cause of death worldwide. Clots' mechanical properties are critical determinants of both the embolization process and the pathophysiological consequences thereof. Thus, understanding and quantifying the mechanical properties of clots is important to our ability to treat and prevent thromboembolic disease. However, assessing these properties from in vivo clots is experimentally challenging. Therefore, we and others have turned to studying in vitro clot mimics instead. Unfortunately, there are significant discrepancies in the reported properties of these clot mimics, which have been hypothesized to arise from differences in experimental techniques and blood sources. The goal of our current work is therefore to compare the mechanical behavior of clots made from the two most common sources, human and bovine blood, using the same experimental techniques. To this end, we tested clots under pure shear with and without initial cracks, under cyclic loading, and under stress relaxation. Based on these data, we computed and compared stiffness, strength, work-to-rupture, fracture toughness, relaxation time constants, and prestrain. While clots from both sources behaved qualitatively similarly, they differed quantitatively in almost every metric. We also correlated each mechanical metric to measures of blood composition. Thereby, we traced this inter-species variability in clot mechanics back to significant differences in hematocrit, but not platelet count. Thus, our work suggests that the results of past studies that have used bovine blood to make in vitro mimics - without adjusting blood composition - should be interpreted carefully. Future studies about the mechanical properties of blood clots should focus on human blood alone.
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Affiliation(s)
- Gabriella P Sugerman
- University of Texas at Austin, Department of Biomedical Engineering, 107 W Dean Keeton St, Austin, TX 78712, United States of America
| | - Grace N Bechtel
- University of Texas at Austin, Department of Biomedical Engineering, 107 W Dean Keeton St, Austin, TX 78712, United States of America
| | - Zuzanna Malinowska
- University of Texas at Austin, Department of Aerospace Engineering & Engineering Mechanics, 2617 Wichita St, Austin, TX 78712, United States of America
| | - Sapun H Parekh
- University of Texas at Austin, Department of Biomedical Engineering, 107 W Dean Keeton St, Austin, TX 78712, United States of America
| | - Manuel K Rausch
- University of Texas at Austin, Department of Biomedical Engineering, 107 W Dean Keeton St, Austin, TX 78712, United States of America; University of Texas at Austin, Department of Aerospace Engineering & Engineering Mechanics, 2617 Wichita St, Austin, TX 78712, United States of America; University of Texas at Austin, Department of Mechanical Engineering, 204 E Dean Keeton St, Austin, TX 78712, United States of America; University of Texas at Austin, Oden Institute for Computational Engineering and Sciences, 201 E 24th St, Austin, TX 78712, United States of America.
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7
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Peshkova AD, Weisel JW, Litvinov RI. A novel technique to quantify the kinetics of blood clot contraction based on the expulsion of fluorescently labeled albumin into serum. J Thromb Haemost 2024; 22:1742-1748. [PMID: 38401713 PMCID: PMC11139561 DOI: 10.1016/j.jtha.2024.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/09/2024] [Accepted: 02/10/2024] [Indexed: 02/26/2024]
Abstract
BACKGROUND The platelet-driven contraction or retraction of blood clots has been utilized to obtain blood serum for laboratory studies, but now, in vitro clot contraction assays are used in research laboratories and clinics to assess platelet functionality. The static final extent of clot contraction measured using a clot size or expelled serum volume can be supplemented substantially with a dynamic analysis. OBJECTIVES To provide a step-by-step protocol for a relatively simple and affordable new automated methodology to follow the kinetics of blood clot contraction, which allows for simultaneous measurements of various samples at a time and requires only a fluorescence plate reader. METHODS The kinetics of clot contraction in whole blood was assessed by continuously detecting the fluorescence intensity of fluorescein isothiocyanate-albumin added to a blood sample before clotting and expelled into the serum during clot shrinkage. RESULTS The clots are formed and fluorescence is measured in the wells of a black multiwell plate using a standard plate fluorescent reader. The specificity of this technique for clot contraction has been demonstrated by the strong inhibitory effects of blebbistatin, latrunculin A, and abciximab. To validate the new technique, increased fluorescence intensity in the contracting clots was measured in parallel with a visual decrease in clot size performed with the same blood samples. CONCLUSION The resulting clot contraction dynamics based on the expulsion of fluorescein isothiocyanate-albumin can be quantified using a number of kinetic parameters as well as a phase kinetics analysis. The advantages and drawbacks of the new technique are discussed.
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Affiliation(s)
- Alina D Peshkova
- Department of Pharmacology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - John W Weisel
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Rustem I Litvinov
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
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8
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Griffin MS, Dahlgren AR, Nagaswami C, Litvinov RI, Keeler K, Madenjian C, Fuentes R, Fish RJ, Neerman-Arbez M, Holinstat M, Adili R, Weisel JW, Shavit JA. Composition of thrombi in zebrafish: similarities and distinctions with mammals. J Thromb Haemost 2024; 22:1056-1068. [PMID: 38160724 PMCID: PMC11293624 DOI: 10.1016/j.jtha.2023.12.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 11/28/2023] [Accepted: 12/14/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND Blood clots are primarily composed of red blood cells (RBCs), platelets/thrombocytes, and fibrin. Despite the similarities observed between mammals and zebrafish, the composition of fish thrombi is not as well known. OBJECTIVES To analyze the formation of zebrafish blood clots ex vivo and arterial and venous thrombi in vivo. METHODS Transgenic zebrafish lines and laser-mediated endothelial injury were used to determine the relative ratio of RBCs and thrombocytes in clots. Scanning electron and confocal microscopy provided high-resolution images of the structure of adult and larval clots. Adult and larval thrombocyte spreading on fibrinogen was evaluated ex vivo. RESULTS RBCs were present in arterial and venous thrombi, making up the majority of cells in both circulations. However, bloodless mutant fish demonstrated that fibrin clots can form in vivo in the absence of blood cells. Scanning electron and confocal microscopy showed that larval and adult zebrafish thrombi and mammalian thrombi look surprisingly similar externally and internally, even though the former have nucleated RBCs and thrombocytes. Although adult thrombocytes spread on fibrinogen, we found that larval cells do not fully activate without the addition of plasma from adult fish, suggesting a developmental deficiency of a plasma activating factor. Finally, mutants lacking αIIbβ3 demonstrated that this integrin mediates thrombocyte spreading on fibrinogen. CONCLUSION Our data showed strong conservation of arterial and venous and clot/thrombus formation across species, including developmental regulation of thrombocyte function. This correlation supports the possibility that mammals also do not absolutely require circulating cells to form fibrin clots in vivo.
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Affiliation(s)
- Megan S Griffin
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan, USA
| | - Anna R Dahlgren
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan, USA
| | - Chandrasekaran Nagaswami
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Rustem I Litvinov
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Kevin Keeler
- US Geological Survey Great Lakes Science Center, Ann Arbor, Michigan, USA
| | - Charles Madenjian
- US Geological Survey Great Lakes Science Center, Ann Arbor, Michigan, USA
| | - Ricardo Fuentes
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Richard J Fish
- Department of Genetic Medicine and Development, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Marguerite Neerman-Arbez
- Department of Genetic Medicine and Development, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Michael Holinstat
- Department of Pharmacology, University of Michigan, Ann Arbor, Michigan, USA
| | - Reheman Adili
- Department of Pharmacology, University of Michigan, Ann Arbor, Michigan, USA
| | - John W Weisel
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Jordan A Shavit
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan, USA; Department of Human Genetics, University of Michigan, Ann Arbor, Michigan, USA.
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9
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Tang X, Liao R, Zhou L, Yi T, Ran M, Luo J, Huang F, Wu A, Mei Q, Wang L, Huang X, Wu J. Genistin: A Novel Estrogen Analogue Targeting ERβ to Alleviate Thrombocytopenia. Int J Biol Sci 2024; 20:2236-2260. [PMID: 38617546 PMCID: PMC11008259 DOI: 10.7150/ijbs.90483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 02/14/2024] [Indexed: 04/16/2024] Open
Abstract
Thrombocytopenia, a prevalent hematologic challenge, correlates directly with the mortality of numerous ailments. Current therapeutic avenues for thrombocytopenia are not without limitations. Here, we identify genistin, an estrogen analogue, as a promising candidate for thrombocytopenia intervention, discovered through AI-driven compound library screening. While estrogen's involvement in diverse biological processes is recognized, its role in thrombopoiesis remains underexplored. Our findings elucidate genistin's ability to enhance megakaryocyte differentiation, thereby augmenting platelet formation and production. In vivo assessments further underscore genistin's remedial potential against radiation-induced thrombocytopenia. Mechanistically, genistin's efficacy is attributed to its direct interaction with estrogen receptor β (ERβ), with subsequent activation of both ERK1/2 and the Akt signaling pathways membrane ERβ. Collectively, our study positions genistin as a prospective therapeutic strategy for thrombocytopenia, shedding light on novel interplays between platelet production and ERβ.
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Affiliation(s)
- Xiaoqin Tang
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, School of Pharmacy, Southwest Medical University, Luzhou,646000, China
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China
| | - Rui Liao
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, School of Pharmacy, Southwest Medical University, Luzhou,646000, China
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China
| | - Ling Zhou
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, School of Pharmacy, Southwest Medical University, Luzhou,646000, China
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China
| | - Taian Yi
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Mei Ran
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, School of Pharmacy, Southwest Medical University, Luzhou,646000, China
| | - Jiesi Luo
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China
| | - Feihong Huang
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, School of Pharmacy, Southwest Medical University, Luzhou,646000, China
| | - Anguo Wu
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, School of Pharmacy, Southwest Medical University, Luzhou,646000, China
| | - Qibing Mei
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, School of Pharmacy, Southwest Medical University, Luzhou,646000, China
| | - Long Wang
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, School of Pharmacy, Southwest Medical University, Luzhou,646000, China
| | - Xinwu Huang
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, School of Pharmacy, Southwest Medical University, Luzhou,646000, China
| | - Jianming Wu
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, School of Pharmacy, Southwest Medical University, Luzhou,646000, China
- School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China
- Education Ministry Key Laboratory of Medical Electrophysiology, Southwest Medical University, Luzhou 646000, China
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10
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Crochemore T, Görlinger K, Lance MD. Early Goal-Directed Hemostatic Therapy for Severe Acute Bleeding Management in the Intensive Care Unit: A Narrative Review. Anesth Analg 2024; 138:499-513. [PMID: 37977195 PMCID: PMC10852045 DOI: 10.1213/ane.0000000000006756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/16/2023] [Indexed: 11/19/2023]
Abstract
This is a narrative review of the published evidence for bleeding management in critically ill patients in different clinical settings in the intensive care unit (ICU). We aimed to describe "The Ten Steps" approach to early goal-directed hemostatic therapy (EGDHT) using point-of-care testing (POCT), coagulation factor concentrates, and hemostatic drugs, according to the individual needs of each patient. We searched National Library of Medicine, MEDLINE for publications relevant to management of critical ill bleeding patients in different settings in the ICU. Bibliographies of included articles were also searched to identify additional relevant studies. English-language systematic reviews, meta-analyses, randomized trials, observational studies, and case reports were reviewed. Data related to study methodology, patient population, bleeding management strategy, and clinical outcomes were qualitatively evaluated. According to systematic reviews and meta-analyses, EGDHT guided by viscoelastic testing (VET) has been associated with a reduction in transfusion utilization, improved morbidity and outcome in patients with active bleeding. Furthermore, literature data showed an increased risk of severe adverse events and poor clinical outcomes with inappropriate prophylactic uses of blood components to correct altered conventional coagulation tests (CCTs). Finally, prospective, randomized, controlled trials point to the role of goal-directed fibrinogen substitution to reduce bleeding and the amount of red blood cell (RBC) transfusion with the potential to decrease mortality. In conclusion, severe acute bleeding management in the ICU is still a major challenge for intensive care physicians. The organized and sequential approach to the bleeding patient, guided by POCT allows for rapid and effective bleeding control, through the rational use of blood components and hemostatic drugs, since VET can identify specific coagulation disorders in real time, guiding hemostatic therapy with coagulation factor concentrates and hemostatic drugs with individual goals.
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Affiliation(s)
- Tomaz Crochemore
- From the Department of Critical Care, Hospital Vila Nova Star, São Paulo, Brazil
- Department of Critical Care, Hospital Israelita Albert Einstein, São Paulo, Brazil
- Werfen LATAM, São Paulo, Brazil
| | - Klaus Görlinger
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, Essen, Germany
- TEM Innovations GmbH/Werfen PBM, Munich, Germany
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11
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Bosio G, Destrempes F, Yazdani L, Roy Cardinal MH, Cloutier G. Resonance, Velocity, Dispersion, and Attenuation of Ultrasound-Induced Shear Wave Propagation in Blood Clot In Vitro Models. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2024; 43:535-551. [PMID: 38108551 DOI: 10.1002/jum.16387] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 11/24/2023] [Accepted: 11/25/2023] [Indexed: 12/19/2023]
Abstract
OBJECTIVE Improve the characterization of mechanical properties of blood clots. Parameters derived from shear wave (SW) velocity and SW amplitude spectra were determined for gel phantoms and in vitro blood clots. METHODS Homogeneous phantoms and phantoms with gel or blood clot inclusions of different diameters and mechanical properties were analyzed. SW amplitude spectra were used to observe resonant peaks. Parameters derived from those resonant peaks were related to mimicked blood clot properties. Three regions of interest were tested to analyze where resonances occurred the most. For blood experiments, 20 samples from different pigs were analyzed over time during a 110-minute coagulation period using the Young modulus, SW frequency dispersion, and SW attenuation. RESULTS The mechanical resonance was manifested by an increase in the number of SW spectral peaks as the inclusion diameter was reduced (P < .001). In blood clot inclusions, the Young modulus increased over time during coagulation (P < .001). Descriptive spectral parameters (frequency peak, bandwidth, and distance between resonant peaks) were linearly correlated with clot elasticity values (P < .001) with R2 = .77 for the frequency peak, .60 for the bandwidth, and .48 for the distance between peaks. The SW dispersion and SW attenuation reflecting the viscous behavior of blood clots decreased over time (P < .001), mainly in the early stage of coagulation (first minutes). CONCLUSION The confined soft inclusion configuration favored SW mechanical resonances potentially challenging the computation of spectral-based parameters, such as the SW attenuation. The impact of resonances can be reduced by properly selecting the region of interest for data analysis.
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Affiliation(s)
- Guillaume Bosio
- Institute of Biomedical Engineering, University of Montreal, Montreal, Quebec, Canada
- Laboratory of Biorheology and Medical Ultrasonics, University of Montreal Hospital Research Center (CRCHUM), Montreal, Quebec, Canada
| | - François Destrempes
- Laboratory of Biorheology and Medical Ultrasonics, University of Montreal Hospital Research Center (CRCHUM), Montreal, Quebec, Canada
| | - Ladan Yazdani
- Institute of Biomedical Engineering, University of Montreal, Montreal, Quebec, Canada
- Laboratory of Biorheology and Medical Ultrasonics, University of Montreal Hospital Research Center (CRCHUM), Montreal, Quebec, Canada
| | - Marie-Hélène Roy Cardinal
- Laboratory of Biorheology and Medical Ultrasonics, University of Montreal Hospital Research Center (CRCHUM), Montreal, Quebec, Canada
| | - Guy Cloutier
- Institute of Biomedical Engineering, University of Montreal, Montreal, Quebec, Canada
- Laboratory of Biorheology and Medical Ultrasonics, University of Montreal Hospital Research Center (CRCHUM), Montreal, Quebec, Canada
- Department of Radiology, Radio-Oncology and Nuclear Medicine, University of Montreal, Montreal, Quebec, Canada
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12
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Kim OV, Litvinov RI, Gagne AL, French DL, Brass LF, Weisel JW. Megakaryocyte-induced contraction of plasma clots: cellular mechanisms and structural mechanobiology. Blood 2024; 143:548-560. [PMID: 37944157 PMCID: PMC11033616 DOI: 10.1182/blood.2023021545] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 10/17/2023] [Accepted: 11/02/2023] [Indexed: 11/12/2023] Open
Abstract
ABSTRACT Nonmuscle cell contractility is an essential feature underlying diverse cellular processes such as motility, morphogenesis, division and genome replication, intracellular transport, and secretion. Blood clot contraction is a well-studied process driven by contracting platelets. Megakaryocytes (MKs), which are the precursors to platelets, can be found in bone marrow and lungs. Although they express many of the same proteins and structures found in platelets, little is known about their ability to engage with extracellular proteins such as fibrin and contract. Here, we have measured the ability of MKs to compress plasma clots. Megakaryocytes derived from human induced pluripotent stem cells (iPSCs) were suspended in human platelet-free blood plasma and stimulated with thrombin. Using real-time macroscale optical tracking, confocal microscopy, and biomechanical measurements, we found that activated iPSC-derived MKs (iMKs) caused macroscopic volumetric clot shrinkage, as well as densification and stiffening of the fibrin network via fibrin-attached plasma membrane protrusions undergoing extension-retraction cycles that cause shortening and bending of fibrin fibers. Contraction induced by iMKs involved 2 kinetic phases with distinct rates and durations. It was suppressed by inhibitors of nonmuscle myosin IIA, actin polymerization, and integrin αIIbβ3-fibrin interactions, indicating that the molecular mechanisms of iMK contractility were similar or identical to those in activated platelets. Our findings provide new insights into MK biomechanics and suggest that iMKs can be used as a model system to study platelet contractility. Physiologically, the ability of MKs to contract plasma clots may play a role in the mechanical remodeling of intravascular blood clots and thrombi.
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Affiliation(s)
- Oleg V. Kim
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
- Department of Biomedical Engineering and Mechanics, Fralin Biomedical Research Institute, Center for Soft Matter and Biological Physics, Virginia Tech, Blacksburg, VA
| | - Rustem I. Litvinov
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Alyssa L. Gagne
- Center for Cellular and Molecular Therapeutics, The Children’s Hospital of Philadelphia, Philadelphia, PA
| | - Deborah L. French
- Department of Pathology and Laboratory Medicine, The Children’s Hospital of Philadelphia, Philadelphia, PA
| | - Lawrence F. Brass
- Division of Hematology and Oncology, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - John W. Weisel
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
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13
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Abstract
PURPOSE OF REVIEW This review highlights how the perception of platelet function is evolving based on recent insights into platelet mechanobiology. RECENT FINDINGS The mechanosensitive ion channel Piezo1 mediates activation of free-flowing platelets under conditions of flow acceleration through mechanisms independent of adhesion receptors and classical activation pathways. Interference with the initiation of platelet migration or with the phenotypic switch of migrating platelets to a procoagulant state aggravates inflammatory bleeding. Mechanosensing of biochemical and biophysical microenvironmental cues during thrombus formation feed into platelet contractile force generation. Measurements of single platelet contraction and bulk clot retraction show promise to identify individuals at risk for hemorrhage. SUMMARY New findings unravel novel mechanotransduction pathways and effector functions in platelets, establishing mechanobiology as a pivotal component of platelet function. These insights highlight limitations of existing treatments and offer new potential therapeutic approaches and diagnostic avenues based on mechanobiological principles. Further extensive research is required to distinguish between core hemostatic and pathological mechanisms influenced by platelet mechanosensing.
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Affiliation(s)
- Ingmar Schoen
- School of Pharmacy and Biomolecular Sciences
- Irish Centre for Vascular Biology
| | - Martin Kenny
- UCD Conway SPHERE Research Group
- School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Smita Patil
- School of Pharmacy and Biomolecular Sciences
- Irish Centre for Vascular Biology
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14
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Komatsuya K, Ishikawa M, Kikuchi N, Hirabayashi T, Taguchi R, Yamamoto N, Arai M, Kasahara K. Integrin-Dependent Transient Density Increase in Detergent-Resistant Membrane Rafts in Platelets Activated by Thrombin. Biomedicines 2023; 12:69. [PMID: 38255176 PMCID: PMC10813660 DOI: 10.3390/biomedicines12010069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/12/2023] [Accepted: 12/19/2023] [Indexed: 01/24/2024] Open
Abstract
Platelet lipid rafts are critical membrane domains for adhesion, aggregation, and clot retraction. Lipid rafts are isolated as a detergent-resistant membrane fraction via sucrose density gradient centrifugation. The platelet detergent-resistant membrane shifted to a higher density on the sucrose density gradient upon thrombin stimulation. The shift peaked at 1 min and returned to the control level at 60 min. During this time, platelets underwent clot retraction and spreading on a fibronectin-coated glass strip. Thrombin induced the transient tyrosine phosphorylation of several proteins in the detergent-resistant membrane raft fraction and the transient translocation of fibrin and myosin to the detergent-resistant membrane raft fraction. The level of phosphatidylserine (36:1) was increased and the level of phosphatidylserine (38:4) was decreased in the detergent-resistant membrane raft fraction via the thrombin stimulation. Furthermore, Glanzmann's thrombasthenia integrin αIIbβ3-deficient platelets underwent no detergent-resistant membrane shift to a higher density upon thrombin stimulation. As the phosphorylation of the myosin regulatory light chain on Ser19 was at a high level in Glanzmann's thrombasthenia resting platelets, thrombin caused no further phosphorylation of the myosin regulatory light chain on Ser19 or clot retraction. These observations suggest that the fibrin-integrin αIIbβ3-myosin axis and compositional change of phosphatidylserine species may be required for the platelet detergent-resistant membrane shift to a higher density upon stimulation with thrombin.
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Affiliation(s)
- Keisuke Komatsuya
- Biomembrane Group, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan; (K.K.); (N.K.); (T.H.); (N.Y.)
| | - Masaki Ishikawa
- Laboratory of Clinical Omics Research, Department of Applied Genomics, Kazusa DNA Research Institute, Kisarazu, Chiba 292-0818, Japan;
| | - Norihito Kikuchi
- Biomembrane Group, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan; (K.K.); (N.K.); (T.H.); (N.Y.)
| | - Tetsuya Hirabayashi
- Biomembrane Group, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan; (K.K.); (N.K.); (T.H.); (N.Y.)
| | - Ryo Taguchi
- Department of Metabolome, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Naomasa Yamamoto
- Biomembrane Group, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan; (K.K.); (N.K.); (T.H.); (N.Y.)
| | - Morio Arai
- Biomembrane Group, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan; (K.K.); (N.K.); (T.H.); (N.Y.)
- Sado General Hospital, Niigata 952-1209, Japan
| | - Kohji Kasahara
- Biomembrane Group, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan; (K.K.); (N.K.); (T.H.); (N.Y.)
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15
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Muraoka WT, Nair PM, Darlington DN, Wu X, Bynum JA, Cap AP. A novel, quantitative clot retraction assay to evaluate platelet function. Platelets 2023; 34:2254403. [PMID: 37700390 DOI: 10.1080/09537104.2023.2254403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/14/2023]
Abstract
Blood platelets are crucial to prevent excessive bleeding following injury to blood vessels. Platelets are crucial for the formation of clots and for clot strength. Platelet activation involves aggregation, attachment to fibrin and clot retraction. Most assays that address platelet function measure platelet aggregation, not clot retraction. Here, we describe a 96-well-based clot retraction assay that requires a relatively short runtime and small sample volume. The assay involves continuous optical density monitoring of platelet-rich plasma that is activated with thrombin. The data can be analyzed using time-series analytical tools to generate quantitative information about different phases of clot formation and clot retraction. The assay demonstrated good repeatability and reproducibility and was robust to different calcium concentrations. Impairment of platelet bioenergetics, actin polymerization, fibrin interaction, and signaling significantly affected clot retraction and was detected and showed good agreement with light transmission aggregometry, suggesting that clot retraction is predictive of platelet function. Using this microplate clot retraction assay, we showed a significant difference in platelets stored in autologous plasma compared with platelet additive solution after 7 days of room temperature storage.
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Affiliation(s)
- Wayne T Muraoka
- U.S. Army Institute of Surgical Research, Fort Sam Houston, TX, USA
| | - Prajeeda M Nair
- U.S. Army Institute of Surgical Research, Fort Sam Houston, TX, USA
| | - Daniel N Darlington
- U.S. Army Institute of Surgical Research, Fort Sam Houston, TX, USA
- The Department of Surgery, University of Texas Health, San Antonio, TX, USA
| | - Xiaowu Wu
- U.S. Army Institute of Surgical Research, Fort Sam Houston, TX, USA
- The Department of Surgery, University of Texas Health, San Antonio, TX, USA
| | - James A Bynum
- U.S. Army Institute of Surgical Research, Fort Sam Houston, TX, USA
- The Department of Surgery, University of Texas Health, San Antonio, TX, USA
| | - Andrew P Cap
- U.S. Army Institute of Surgical Research, Fort Sam Houston, TX, USA
- The Department of Surgery, University of Texas Health, San Antonio, TX, USA
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16
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Cruts JMH, Giezen JA, van Gaalen K, Beurskens R, Ridwan Y, Dijkshoorn ML, van Beusekom HMM, Boodt N, van der Lugt A, de Vries JJ, de Maat MPM, Gijsen FJH, Cahalane RME. The association between human blood clot analogue computed tomography imaging, composition, contraction, and mechanical characteristics. PLoS One 2023; 18:e0293456. [PMID: 37956141 PMCID: PMC10642823 DOI: 10.1371/journal.pone.0293456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 10/05/2023] [Indexed: 11/15/2023] Open
Abstract
BACKGROUND Clot composition, contraction, and mechanical properties are likely determinants of endovascular thrombectomy success. A pre-interventional estimation of these properties is hypothesized to aid in selecting the most suitable treatment for different types of thrombi. Here we determined the association between the aforementioned properties and computed tomography (CT) characteristics using human blood clot analogues. METHODS Clot analogues were prepared from the blood of 4 healthy human donors with 5 red blood cell (RBC) volume suspensions: 0%, 20%, 40%, 60% and 80% RBCs. Contraction was measured as the weight of the contracted clots as a percentage of the original suspension. The clots were imaged using CT with and without contrast to quantify clot density and density increase. Unconfined compression was performed to determine the high strain compressive stiffness. The RBC content was analysed using H&E staining. RESULTS The 5 RBC suspensions formed only two groups of clots, fibrin-rich (0% RBCs) and RBC-rich (>90% RBCs), as determined by histology. The density of the fibrin-rich clots was significantly lower (31-38HU) compared to the RBC-rich clots (72-89HU), and the density increase of the fibrin-rich clots was significantly higher (82-127HU) compared to the RBC-rich clots (3-17HU). The compressive stiffness of the fibrin-rich clots was higher (178-1624 kPa) than the stiffness of the RBC-rich clots (6-526 kPa). Additionally, the degree of clot contraction was higher for the fibrin-rich clots (89-96%) compared to the RBC-rich clots (11-77%). CONCLUSIONS CT imaging clearly reflects clot RBC content and seems to be related to the clot contraction and stiffness. CT imaging might be a useful tool in predicting the thrombus characteristics. However, future studies should confirm these findings by analysing clots with intermediate RBC and platelet content.
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Affiliation(s)
- Janneke M. H. Cruts
- Department of Biomedical Engineering, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Jo-Anne Giezen
- Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands
| | - Kim van Gaalen
- Department of Biomedical Engineering, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Robert Beurskens
- Department of Biomedical Engineering, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Yanto Ridwan
- Department of Radiology and Nuclear Medicine, Erasmus Medical Center, Rotterdam, the Netherlands
- Department of Molecular Genetics, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Marcel L. Dijkshoorn
- Department of Radiology and Nuclear Medicine, Erasmus Medical Center, Rotterdam, the Netherlands
| | | | - Nikki Boodt
- Department of Radiology and Nuclear Medicine, Erasmus Medical Center, Rotterdam, the Netherlands
- Department of Neurology, Erasmus Medical Center, Rotterdam, the Netherlands
- Department of Public Health, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Aad van der Lugt
- Department of Radiology and Nuclear Medicine, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Judith J. de Vries
- Department of Hematology, Erasmus Medical Center, Rotterdam, the Netherlands
| | | | - Frank J. H. Gijsen
- Department of Biomedical Engineering, Erasmus Medical Center, Rotterdam, the Netherlands
- Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands
| | - Rachel M. E. Cahalane
- Department of Biomedical Engineering, Erasmus Medical Center, Rotterdam, the Netherlands
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17
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Nurden AT. Molecular basis of clot retraction and its role in wound healing. Thromb Res 2023; 231:159-169. [PMID: 36008192 DOI: 10.1016/j.thromres.2022.08.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 08/08/2022] [Accepted: 08/10/2022] [Indexed: 11/30/2022]
Abstract
Clot retraction is important for the prevention of bleeding, in the manifestations of thrombosis and for tissue repair. The molecular mechanisms behind clot formation are complex. Platelet involvement begins with adhesion at sites of vessel injury followed by platelet aggregation, thrombin generation and fibrin production. Other blood cells incorporate into a fibrin mesh that is consolidated by FXIIIa-mediated crosslinking and platelet contractile activity. The latter results in the asymmetric redistribution of erythrocytes into a tighter central mass providing the clot with stability and resistance to fibrinolysis. Integrin αIIbβ3 on platelets is the key player in these events, bridging fibrin and the platelet cytoskeleton. Glycoprotein VI participates in thrombus formation but not in the retraction. Rheological and environmental factors influence clot construction with retraction driven by the platelet cytoskeleton with actomyosin acting as the motor. Activated platelets provide procoagulant activity stimulating thrombin generation together with the release of a plethora of biologically active proteins and substances from storage pools; many form chemotactic gradients within the fibrin or the underlying matrix. Also released are newly synthesized metabolites and lipid-rich vesicles that circulate within the vasculature and mimic platelet functions. Platelets and their released elements play key roles in wound healing. This includes promoting stem cell and mesenchymal stromal cell recruitment, fibroblast and endothelial cell migration, angiogenesis and matrix formation. These properties have led to the use of autologous clots in therapies designed to accelerate tissue repair while offering the potential for genetic manipulation in both inherited and acquired diseases.
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Affiliation(s)
- Alan T Nurden
- Institut Hospitalo-Universitaire LIRYC, Pessac, France.
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18
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Lin Q, Liao J, Dong W, Zhou F, Xu Y. The relationship between hemoglobin/red blood cell distribution width ratio and mortality in patients with intracranial hemorrhage: a possible protective effect for the elderly? Intern Emerg Med 2023; 18:2301-2310. [PMID: 37740867 DOI: 10.1007/s11739-023-03431-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 09/08/2023] [Indexed: 09/25/2023]
Abstract
Intracranial hemorrhage (ICH) is a neurological emergency with a poor prognosis. This study aimed to understand the association between hemoglobin levels, red blood cell distribution width ratio (HRR), and mortality in patients with ICH. Information on patients with ICH was extracted from the Medical Information Mart for Intensive Care IV (MIMIC-IV) database. Cox proportional risk models were used to assess the relationship between HRR and 28-day and 90-day mortality, and constructed by adjusting for relevant covariates. Segmented regression models and smoothing curves were used to analyze the linear relationship between HRR and mortality. This study recruited 4,716 patients with ICH. The HRR Q4 group was negatively associated with the 28- and 90-day mortality. For patients aged > 65 years, the right-hand threshold inflection points of the HRR were 0.92 and 0.93, respectively, which were negatively associated with 28-day mortality (HR:0.06, 95% CI 0.01, 0.35, p = 0.0016) and with 90-day mortality (p = 0.0006). In the non-linear model, both 28-day mortality (HR, 0.17; 95% CI 0.04-0.75, p = 0.0191; HRR > 0.89) and 90-day mortality (HR, 0.13; 95% CI 0.04-0.49, p = 0.0022; HRR > 0.85) were associated in men. In the subgroup analysis, the negative association between HRR and mortality was more pronounced in patients > 65 years of age, as well as in patients with non-dementia, diabetes, and malignant cancer. We found a non-linear relationship between mortality and the HRR in elderly patients, and a higher HRR was negatively associated with mortality in patients with ICH.
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Affiliation(s)
- QianXia Lin
- Vascular Breast Surgery, Jiangxi Provincial People's Hospital, Nanchang, 330006, Jiangxi, China
- The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi, China
| | - JinPing Liao
- Department of Infectious Diseases, Jiujiang First People's Hospital, Jiujiang, 330006, Jiangxi, China
| | - WeiHua Dong
- The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi, China
- Medical Security Division, Jiangxi Provincial People's Hospital, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Fang Zhou
- Vascular Breast Surgery, Jiangxi Provincial People's Hospital, Nanchang, 330006, Jiangxi, China.
- The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi, China.
| | - Yun Xu
- The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi, China.
- Medical Security Division, Jiangxi Provincial People's Hospital, Nanchang, 330006, Jiangxi, People's Republic of China.
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19
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Lassila R, Weisel JW. Role of red blood cells in clinically relevant bleeding tendencies and complications. J Thromb Haemost 2023; 21:3024-3032. [PMID: 37210074 PMCID: PMC10949759 DOI: 10.1016/j.jtha.2023.05.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/20/2023] [Accepted: 05/10/2023] [Indexed: 05/22/2023]
Abstract
The multiple roles of red blood cells (RBCs) are often neglected as contributors in hemostasis and thrombosis. Proactive opportunities to increase RBC numbers, either acutely or subacutely in the case of iron deficiency, are critical as RBCs are the cellular elements that initiate hemostasis together with platelets and stabilize fibrin and clot structure. RBCs also possess several functional properties to assist hemostasis: releasing platelet agonists, promoting shear force-induced von Willebrand factor unfolding, procoagulant capacity, and binding to fibrin. Additionally, blood clot contraction is important to compress RBCs to form a tightly packed array of polyhedrocytes, making an impermeable seal for hemostasis. All these functions are important for patients having intrinsically poor capacity to cease bleeds (ie, hemostatic disorders) but, conversely, can also play a role in thrombosis if these RBC-mediated reactions overshoot. One acquired example of bleeding with anemia is in patients treated with anticoagulants and/or antithrombotic medication because upon initiation of these drugs, baseline anemia doubles the risk of bleeding complications and mortality. Also, anemia is a risk factor for reoccurring gastrointestinal and urogenital bleeds, pregnancy, and delivery complications. This review summarizes the clinically relevant properties and profiles of RBCs at various steps of platelet adhesion, aggregation, thrombin generation, and fibrin formation, including both structural and functional elements. Regarding patient blood management guidelines, they support minimizing transfusions, but this approach does not deal with severe inherited and acquired bleeding disorders where a poor hemostatic propensity is exacerbated by limited RBC availability, for which future guidance will be needed.
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Affiliation(s)
- Riitta Lassila
- Research Program Unit in Systems Oncology, Oncosys, Medical Faculty, University of Helsinki, Helsinki, Finland; Coagulation Disorders Unit, Department of Hematology, Helsinki University Hospital, Helsinki, Finland.
| | - John W Weisel
- Department of Cell and Developmental Biology, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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20
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Zou Y, Shan Z, Han Z, Yang J, Lin Y, Gong Z, Xie L, Xu J, Xie R, Chen Z, Chen Z. Regulating Blood Clot Fibrin Films to Manipulate Biomaterial-Mediated Foreign Body Responses. RESEARCH (WASHINGTON, D.C.) 2023; 6:0225. [PMID: 37719049 PMCID: PMC10503960 DOI: 10.34133/research.0225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 08/20/2023] [Indexed: 09/19/2023]
Abstract
The clinical efficacy of implanted biomaterials is often compromised by host immune recognition and subsequent foreign body responses (FBRs). During the implantation, biomaterials inevitably come into direct contact with the blood, absorbing blood protein and forming blood clot. Many studies have been carried out to regulate protein adsorption, thus manipulating FBR. However, the role of clot surface fibrin films formed by clotting shrinkage in host reactions and FBR is often ignored. Because of the principle of fibrin film formation being relevant to fibrinogen or clotting factor absorption, it is feasible to manipulate the fibrin film formation via tuning the absorption of fibrinogen and clotting factor. As biological hydroxyapatite reserved bone architecture and microporous structure, the smaller particle size may expose more microporous structures and adsorb more fibrinogen or clotting factor. Therefore, we set up 3 sizes (small, <0.2 mm; medium, 1 to 2 mm; large, 3 to 4 mm) of biological hydroxyapatite (porcine bone-derived hydroxyapatite) with different microporous structures to investigate the absorption of blood protein, the formation of clot surface fibrin films, and the subsequent FBR. We found that small group adsorbed more clotting factors because of more microporous structures and formed the thinnest and sparsest fibrin films. These thinnest and sparsest fibrin films increased inflammation and profibrosis of macrophages through a potential signaling pathway of cell adhesion-cytoskeleton-autophagy, leading to the stronger FBR. Large group adsorbed lesser clotting factors, forming the thickest and densest fibrin films, easing inflammation and profibrosis of macrophages, and finally mitigating FBR. Thus, this study deepens the understanding of the role of fibrin films in host recognition and FBR and demonstrates the feasibility of a strategy to regulate FBR by modulating fibrin films via tuning the absorption of blood proteins.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Zetao Chen
- Hospital of Stomatology, Guanghua School of Stomatology,
Sun Yat-sen University and Guangdong Research Center for Dental and Cranial Rehabilitation and Material Engineering, Guangzhou 510055, China
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21
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Evtugina NG, Peshkova AD, Khabirova AI, Andrianova IA, Abdullayeva S, Ayombil F, Shepeliuk T, Grishchuk EL, Ataullakhanov FI, Litvinov RI, Weisel JW. Activation of Piezo1 channels in compressed red blood cells augments platelet-driven contraction of blood clots. J Thromb Haemost 2023; 21:2418-2429. [PMID: 37268065 PMCID: PMC10949619 DOI: 10.1016/j.jtha.2023.05.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/04/2023]
Abstract
BACKGROUND Piezo1 is a mechanosensitive cationic channel that boosts intracellular [Ca2+]i. Compression of red blood cells (RBCs) during platelet-driven contraction of blood clots may cause the activation of Piezo1. OBJECTIVES To establish relationships between Piezo1 activity and blood clot contraction. METHODS Effects of a Piezo1 agonist, Yoda1, and antagonist, GsMTx-4, on clot contraction in vitro were studied in human blood containing physiological [Ca2+]. Clot contraction was induced by exogenous thrombin. Activation of Piezo1 was assessed by Ca2+ influx in RBCs and with other functional and morphologic features. RESULTS Piezo1 channels in compressed RBCs are activated naturally during blood clot contraction and induce an upsurge in the intracellular [Ca2+]i, followed by phosphatidylserine exposure. Adding the Piezo1 agonist Yoda1 to whole blood increased the extent of clot contraction due to Ca2+-dependent volumetric shrinkage of RBCs and increased platelet contractility due to their hyperactivation by the enhanced generation of endogenous thrombin on activated RBCs. Addition of rivaroxaban, the inhibitor of thrombin formation, or elimination of Ca2+ from the extracellular space abrogated the stimulating effect of Yoda1 on clot contraction. The Piezo1 antagonist, GsMTx-4, caused a decrease in the extent of clot contraction relative to the control both in whole blood and in platelet-rich plasma. Activated Piezo1 in compressed and deformed RBCs amplified the platelet contractility as a positive feedback mechanism during clot contraction. CONCLUSION The results obtained demonstrate that the Piezo1 channel expressed on RBCs comprises a mechanochemical modulator of blood clotting that may be considered a potential therapeutic target to correct hemostatic disorders.
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Affiliation(s)
- Natalia G Evtugina
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Republic of Tatarstan, Russian Federation
| | - Alina D Peshkova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Republic of Tatarstan, Russian Federation; Department of Pharmacology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Alina I Khabirova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Republic of Tatarstan, Russian Federation
| | - Izabella A Andrianova
- Department of Internal Medicine, Division of Hematology and Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Shahnoza Abdullayeva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Republic of Tatarstan, Russian Federation
| | - Francis Ayombil
- Division of Hematology and the Raymond G. Perelman Center for Cellular and Molecular Therapeutics, the Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Taisia Shepeliuk
- Department of Physiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Ekaterina L Grishchuk
- Department of Physiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Fazoil I Ataullakhanov
- Department of Physiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Rustem I Litvinov
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - John W Weisel
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
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22
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Michael C, Pancaldi F, Britton S, Kim OV, Peshkova AD, Vo K, Xu Z, Litvinov RI, Weisel JW, Alber M. Combined computational modeling and experimental study of the biomechanical mechanisms of platelet-driven contraction of fibrin clots. Commun Biol 2023; 6:869. [PMID: 37620422 PMCID: PMC10449797 DOI: 10.1038/s42003-023-05240-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/10/2023] [Indexed: 08/26/2023] Open
Abstract
While blood clot formation has been relatively well studied, little is known about the mechanisms underlying the subsequent structural and mechanical clot remodeling called contraction or retraction. Impairment of the clot contraction process is associated with both life-threatening bleeding and thrombotic conditions, such as ischemic stroke, venous thromboembolism, and others. Recently, blood clot contraction was observed to be hindered in patients with COVID-19. A three-dimensional multiscale computational model is developed and used to quantify biomechanical mechanisms of the kinetics of clot contraction driven by platelet-fibrin pulling interactions. These results provide important biological insights into contraction of platelet filopodia, the mechanically active thin protrusions of the plasma membrane, described previously as performing mostly a sensory function. The biomechanical mechanisms and modeling approach described can potentially apply to studying other systems in which cells are embedded in a filamentous network and exert forces on the extracellular matrix modulated by the substrate stiffness.
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Affiliation(s)
- Christian Michael
- Department of Mathematics, University of California Riverside, Riverside, CA, 92521, USA
- Center for Quantitative Modeling in Biology, University of California Riverside, Riverside, CA, 92521, USA
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Francesco Pancaldi
- Department of Mathematics, University of California Riverside, Riverside, CA, 92521, USA
- Center for Quantitative Modeling in Biology, University of California Riverside, Riverside, CA, 92521, USA
| | - Samuel Britton
- Department of Mathematics, University of California Riverside, Riverside, CA, 92521, USA
- Center for Quantitative Modeling in Biology, University of California Riverside, Riverside, CA, 92521, USA
| | - Oleg V Kim
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
- Department of Biomedical Engineering and Mechanics, Center for Soft Matter and Biological Physics, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Alina D Peshkova
- Department of Pharmacology, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
| | - Khoi Vo
- Department of Mathematics, University of California Riverside, Riverside, CA, 92521, USA
- Center for Quantitative Modeling in Biology, University of California Riverside, Riverside, CA, 92521, USA
| | - Zhiliang Xu
- Department of Applied and Computational Mathematics and Statistics, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Rustem I Litvinov
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
| | - John W Weisel
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA.
| | - Mark Alber
- Department of Mathematics, University of California Riverside, Riverside, CA, 92521, USA.
- Center for Quantitative Modeling in Biology, University of California Riverside, Riverside, CA, 92521, USA.
- Department of Bioengineering, University of California Riverside, Riverside, CA, 92521, USA.
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23
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Gao D, Sun CW, Woodley AB, Dong JF. Clot Retraction and Its Correlation with the Function of Platelet Integrin α IIbβ 3. Biomedicines 2023; 11:2345. [PMID: 37760786 PMCID: PMC10525596 DOI: 10.3390/biomedicines11092345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 09/29/2023] Open
Abstract
Clot retraction results from retractions of platelet filopodia and fibrin fibers and requires the functional platelet αIIbβ3 integrin. This assay is widely used to test the functions of platelets and fibrinogen as well as the efficacy of fibrinolysis. Changes in clot retraction have been found in a variety of hemostatic abnormalities and, more recently, in arterial thrombosis. Despite its broad clinical use and low cost, many aspects of clot retraction are poorly understood. In the present study, we performed two clinical standard clot retraction assays using whole-blood and platelet-rich plasma (PRP) samples to determine how clot retraction correlates with platelet counts and mean volume, the density of αIIbβ3 integrin and PLA genotypes, and plasma fibrinogen levels. We found that clot retraction was affected by platelet counts, but not mean platelet volume. It correlated with the surface density of the integrin αIibβ3, but not PLA genotypes. These results indicate that clot retraction measures a unique aspect of platelet function and can serve as an additional means to detect functional changes in platelets.
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Affiliation(s)
- Daniel Gao
- Bloodworks Research Institute, 1551 Southlake Ave. E., Seattle, WA 98102, USA;
- Department of Chemistry, Pomona College, Claremont, CA 91711, USA
| | - Caroline W. Sun
- Section of Cardiovascular Sciences, Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - Angela B. Woodley
- Section of Cardiovascular Sciences, Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jing-fei Dong
- Bloodworks Research Institute, 1551 Southlake Ave. E., Seattle, WA 98102, USA;
- Division of Hematology, Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA
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24
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Beussman KM, Mollica MY, Leonard A, Miles J, Hocter J, Song Z, Stolla M, Han SJ, Emery A, Thomas WE, Sniadecki NJ. Black dots: High-yield traction force microscopy reveals structural factors contributing to platelet forces. Acta Biomater 2023; 163:302-311. [PMID: 34781024 PMCID: PMC9098698 DOI: 10.1016/j.actbio.2021.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 10/12/2021] [Accepted: 11/10/2021] [Indexed: 01/03/2023]
Abstract
Measuring the traction forces produced by cells provides insight into their behavior and physiological function. Here, we developed a technique (dubbed 'black dots') that microcontact prints a fluorescent micropattern onto a flexible substrate to measure cellular traction forces without constraining cell shape or needing to detach the cells. To demonstrate our technique, we assessed human platelets, which can generate a large range of forces within a population. We find platelets that exert more force have more spread area, are more circular, and have more uniformly distributed F-actin filaments. As a result of the high yield of data obtainable by this technique, we were able to evaluate multivariate mixed effects models with interaction terms and conduct a clustering analysis to identify clusters within our data. These statistical techniques demonstrated a complex relationship between spread area, circularity, F-actin dispersion, and platelet force, including cooperative effects that significantly associate with platelet traction forces. STATEMENT OF SIGNIFICANCE: Cells produce contractile forces during division, migration, or wound healing. Measuring cellular forces provides insight into their health, behavior, and function. We developed a technique that calculates cellular forces by seeding cells onto a pattern and quantifying how much each cell displaces the pattern. This technique is capable of measuring hundreds of cells without needing to detach them. Using this technique to evaluate human platelets, we find that platelets exerting more force tend to have more spread area, are more circular in shape, and have more uniformly distributed cytoskeletal filaments. Due to our high yield of data, we were able to apply statistical techniques that revealed combinatorial effects between these factors.
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Affiliation(s)
- Kevin M Beussman
- Department of Mechanical Engineering, University of Washington, Seattle, WA, United States
| | - Molly Y Mollica
- Department of Bioengineering, University of Washington, Seattle, WA, United States
| | - Andrea Leonard
- Department of Mechanical Engineering, University of Washington, Seattle, WA, United States
| | - Jeffrey Miles
- Bloodworks Northwest Research Institute, Seattle, WA
| | - John Hocter
- Department of Biostatistics, University of Washington, Seattle, WA, United States
| | - Zizhen Song
- School of Computer Science & Engineering, University of Washington, Seattle, WA, United States
| | - Moritz Stolla
- Bloodworks Northwest Research Institute, Seattle, WA; Division of Hematology, Department of Medicine, University of Washington, Seattle, WA, United States
| | - Sangyoon J Han
- Department of Biomedical Engineering, Michigan Technological University, Houghton, MI, United States
| | - Ashley Emery
- Department of Mechanical Engineering, University of Washington, Seattle, WA, United States
| | - Wendy E Thomas
- Department of Bioengineering, University of Washington, Seattle, WA, United States
| | - Nathan J Sniadecki
- Department of Mechanical Engineering, University of Washington, Seattle, WA, United States; Department of Bioengineering, University of Washington, Seattle, WA, United States; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States; Department of Laboratory Medicine & Pathology, University of Washington, Seattle, WA, United States; Resuscitation Engineering Science Unit (RESCU), University of Washington, Seattle, WA, United States.
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25
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Schepers LE, Chernysh IN, Albrecht CK, Browning LC, Hillsdon-Smith ML, Cox AD, Weisel JW, Goergen CJ. Aortic Dissection Detection and Thrombus Structure Quantification Using Volumetric Ultrasound, Histology, and Scanning Electron Microscopy. JVS Vasc Sci 2023. [DOI: 10.1016/j.jvssci.2023.100105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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26
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Fibrin-Rhamnogalacturonan I Composite Gel for Therapeutic Enzyme Delivery to Intestinal Tumors. Int J Mol Sci 2023; 24:ijms24020926. [PMID: 36674440 PMCID: PMC9862006 DOI: 10.3390/ijms24020926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/22/2022] [Accepted: 12/30/2022] [Indexed: 01/06/2023] Open
Abstract
Therapy of colorectal cancer with protein drugs, including targeted therapy using monoclonal antibodies, requires the preservation of the drug's structure and activity in the gastrointestinal tract or bloodstream. Here, we confirmed experimentally the fundamental possibility of creating composite protein-polysaccharide hydrogels based on non-degrading rhamnogalacturonan I (RG) and fibrin as a delivery vehicle for antitumor RNase binase. The method is based on enzymatic polymerization of fibrin in the presence of RG with the inclusion of liposomes, containing an encapsulated enzyme drug, into the gel network. The proposed method for fabricating a gel matrix does not require the use of cytotoxic chemical cross-linking agents and divalent cations, and contains completely biocompatible and biodegradable components. The process proceeds under physiological conditions, excluding the effect of high temperatures, organic solvents and ultrasound on protein components. Immobilization of therapeutic enzyme binase in the carrier matrix by encapsulating it in liposomes made from uncharged lipid made it possible to achieve its prolonged release with preservation of activity for a long time. The release time of binase from the composite carrier can be regulated by variation of the fibrin and RG concentration.
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27
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Litvinov RI, Weisel JW. Blood clot contraction: Mechanisms, pathophysiology, and disease. Res Pract Thromb Haemost 2023; 7:100023. [PMID: 36760777 PMCID: PMC9903854 DOI: 10.1016/j.rpth.2022.100023] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/09/2022] [Accepted: 11/17/2022] [Indexed: 01/18/2023] Open
Abstract
A State of the Art lecture titled "Blood Clot Contraction: Mechanisms, Pathophysiology, and Disease" was presented at the International Society on Thrombosis and Haemostasis (ISTH) Congress in 2022. This was a systematic description of blood clot contraction or retraction, driven by activated platelets and causing compaction of the fibrin network along with compression of the embedded erythrocytes. The consequences of clot contraction include redistribution of the fibrin-platelet meshwork toward the periphery of the clot and condensation of erythrocytes in the core, followed by their deformation from the biconcave shape into polyhedral cells (polyhedrocytes). These structural signatures of contraction have been found in ex vivo thrombi derived from various locations, which indicated that clots undergo intravital contraction within the blood vessels. In hemostatic clots, tightly packed polyhedrocytes make a nearly impermeable seal that stems bleeding and is impaired in hemorrhagic disorders. In thrombosis, contraction facilitates the local blood flow by decreasing thrombus obstructiveness, reducing permeability, and changing susceptibility to fibrinolytic enzymes. However, in (pro)thrombotic conditions, continuous background platelet activation is followed by platelet exhaustion, refractoriness, and impaired intravital clot contraction, which is associated with weaker thrombi predisposed to embolization. Therefore, assays that detect imperfect in vitro clot contraction have potential diagnostic and prognostic values for imminent or ongoing thrombosis and thrombotic embolism. Collectively, the contraction of blood clots and thrombi is an underappreciated and understudied process that has a pathogenic and clinical significance in bleeding and thrombosis of various etiologies. Finally, we have summarized relevant new data on this topic presented during the 2022 ISTH Congress.
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Affiliation(s)
- Rustem I Litvinov
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - John W Weisel
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
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28
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A familial case of MYH9 gene mutation associated with multiple functional and structural platelet abnormalities. Sci Rep 2022; 12:19975. [PMID: 36404341 PMCID: PMC9676191 DOI: 10.1038/s41598-022-24098-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 11/09/2022] [Indexed: 11/21/2022] Open
Abstract
Mutations in the MYH9 gene result in macrothrombocytopenia often associated with hemorrhages. Here, we studied the function and structure of platelets in three family members with a heterozygous mutation R1933X in the MYH9 gene, characteristic of closely related disorders known as the May-Hegglin anomaly and Sebastian syndrome. The examination included complete blood count, blood smear microscopy, platelet flow cytometry (expression of P-selectin and active integrin αIIbβ3 before and after activation), the kinetics of platelet-driven contraction (retraction) of blood clots, as well as scanning/transmission electron microscopy of platelets. Despite severe thrombocytopenia ranging (36-86) × 109/l, none of the patients had hemorrhages at the time of examination, although they had a history of heavy menstruation, spontaneous ecchymosis, and postpartum hemorrhage. Flow cytometry showed background platelet activation, revealed by overexpression of P-selectin and active αIIbβ3 integrin above normal levels. After TRAP-induced stimulation, the fractions of platelets expressing P-selectin in the proband and her sister were below normal response, indicating partial platelet refractoriness. The initiation of clot contraction was delayed. Electron microscopy revealed giant platelets with multiple filopodia and fusion of α-granules with dilated open canalicular system, containing filamentous and vesicular inclusions. The novel concept implies that the R1933X mutation in the MYH9 gene is associated not only with thrombocytopenia, but also with qualitative structural and functional defects in platelets. Platelet dysfunction includes impaired contractility, which can disrupt the compaction of hemostatic clots, making the clots weak and permeable, therefore predisposing patients with MYH9 gene mutations to the hemorrhagic phenotype.
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29
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Risman RA, Abdelhamid A, Weisel JW, Bannish BE, Tutwiler V. Effects of clot contraction on clot degradation: A mathematical and experimental approach. Biophys J 2022; 121:3271-3285. [PMID: 35927957 PMCID: PMC9463642 DOI: 10.1016/j.bpj.2022.07.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 06/09/2022] [Accepted: 07/19/2022] [Indexed: 12/01/2022] Open
Abstract
Thrombosis, resulting in occlusive blood clots, blocks blood flow to downstream organs and causes life-threatening conditions such as heart attacks and strokes. The administration of tissue plasminogen activator (t-PA), which drives the enzymatic degradation (fibrinolysis) of these blood clots, is a treatment for thrombotic conditions, but the use of these therapeutics is often limited due to the time-dependent nature of treatment and their limited success. We have shown that clot contraction, which is altered in prothrombotic conditions, influences the efficacy of fibrinolysis. Clot contraction results in the volume shrinkage of blood clots, with the redistribution and densification of fibrin and platelets on the exterior of the clot and red blood cells in the interior. Understanding how these key structural changes influence fibrinolysis can lead to improved diagnostics and patient care. We used a combination of mathematical modeling and experimental methodologies to characterize the process of exogenous delivery of t-PA (external fibrinolysis). A three-dimensional (3D) stochastic, multiscale model of external fibrinolysis was used to determine how the structural changes that occur during the process of clot contraction influence the mechanism(s) of fibrinolysis. Experiments were performed based on modeling predictions using pooled human plasma and the external delivery of t-PA to initiate lysis. Analysis of fibrinolysis simulations and experiments indicate that fibrin densification makes the most significant contribution to the rate of fibrinolysis compared with the distribution of components and degree of compaction (p < 0.0001). This result suggests the possibility of a certain fibrin density threshold above which t-PA effective diffusion is limited. From a clinical perspective, this information can be used to improve on current therapeutics by optimizing timing and delivery of lysis agents.
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Affiliation(s)
| | | | - John W Weisel
- University of Pennsylvania, Philadelphia, Pennsylvania
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30
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Assessment of creatinine concentration in whole blood spheroids using paper spray ionization-tandem mass spectrometry. Sci Rep 2022; 12:14308. [PMID: 35995992 PMCID: PMC9395369 DOI: 10.1038/s41598-022-18365-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 08/10/2022] [Indexed: 11/08/2022] Open
Abstract
Accurate quantification of blood creatinine is important to estimate the glomerular filtration rate. Existing techniques using liquid chromatography tandem mass spectrometry (LC–MS/MS) have a high accuracy and eliminate most interferences encountered in routine enzymatic and Jaffé methods. However, they require laborious and time-consuming sample treatment and data acquisition. The aim of this study is to develop a fast and simple method to enable a direct analysis of whole blood creatinine with performance measures that are comparable to conventional LC–MS/MS. 5μL whole blood is formed as a three-dimensional spheroid on hydrophobic silanized paper substrates which then undergoes paper-spray ionization—tandem mass spectrometry (PSI–MS/MS). The method is validated using real human samples and compared with LC–MS/MS. PSI–MS/MS whole blood analysis exhibited a lower limit of quantification of 2.5 μg/mL, precision ≤ 6.3%, recovery in the range of 88–94% and excellent linearity (R2 > 0.99; 2.5—20 μg/mL) covering the normal range for creatinine levels. Creatinine levels were comparable to those measured by LC–MS/MS with small deviations of less than 0.3 μg/mL. This simple, fast and accurate microsampling technique for direct analysis of creatinine from whole blood shows promise for routine clinical screening and monitoring. This approach can be readily extended for other analytes of interest and, due to inherent advantages relating to cost, storability, speed, and simplicity, it can be especially advantageous for use in resource-limited settings.
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31
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Kim OV, Litvinov RI, Mordakhanova ER, Bi E, Vagin O, Weisel JW. Contribution of septins to human platelet structure and function. iScience 2022; 25:104654. [PMID: 35832887 PMCID: PMC9272382 DOI: 10.1016/j.isci.2022.104654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 04/23/2022] [Accepted: 06/17/2022] [Indexed: 11/29/2022] Open
Abstract
Although septins have been well-studied in nucleated cells, their role in anucleate blood platelets remains obscure. Here, we elucidate the contribution of septins to human platelet structure and functionality. We show that Septin-2 and Septin-9 are predominantly distributed at the periphery of resting platelets and co-localize strongly with microtubules. Activation of platelets by thrombin causes clustering of septins and impairs their association with microtubules. Inhibition of septin dynamics with forchlorfenuron (FCF) reduces thrombin-induced densification of septins and lessens their colocalization with microtubules in resting and activated platelets. Exposure to FCF alters platelet shape, suggesting that septins stabilize platelet cytoskeleton. FCF suppresses platelet integrin αIIbβ3 activation, promotes phosphatidylserine exposure on activated platelets, and induces P-selectin expression on resting platelets, suggesting septin involvement in these processes. Inhibition of septin dynamics substantially reduces platelet contractility and abrogates their spreading on fibrinogen-coated surfaces. Overall, septins strongly contribute to platelet structure, activation and biomechanics.
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Affiliation(s)
- Oleg V. Kim
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Rustem I. Litvinov
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Elmira R. Mordakhanova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russian Federation
| | - Erfei Bi
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Olga Vagin
- Department of Pediatrics, Geffen School of Medicine at UCLA, Los Angeles, CA, USA
- Veterans Affairs Greater Los Angeles Health Care System, Los Angeles, CA, USA
| | - John W. Weisel
- Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
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32
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Interaction of von Willebrand factor with blood cells in flow models: a systematic review. Blood Adv 2022; 6:3979-3990. [PMID: 35816358 PMCID: PMC9278308 DOI: 10.1182/bloodadvances.2021006405] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 05/02/2022] [Indexed: 11/29/2022] Open
Abstract
The presence of blood flow influences the interaction between von Willebrand factor (VWF) and blood cells, affecting characteristics of forming blood clots. The interactions between coagulation and inflammation have mainly been studied in thrombosis models, but it remains unclear whether these interactions might also play a role in reduced bleeding in patients with bleeding disorders. In this systematic review, we provide an overview of the literature investigating the interactions between VWF and blood cells in flow models. For article selection, a systematic search was performed in Embase, Medline-Ovid, Cochrane Library, Web of Science databases, and Google Scholar. After selection, 24 articles were included. These articles describe direct or platelet-dependent interactions between VWF and neutrophils, monocytes, erythrocytes, or lymphocytes under different flow conditions. Almost all the described interactions required the presence of activated platelets. Only erythrocytes, monocytes, and natural killer cells were capable of directly binding the VWF multimers. Overall, interactions between VWF and blood cells mainly occurred in the presence of platelets. Because of the large variation in study design and used flow rates, further research is necessary to compare the results between studies and draw firm conclusions on when and under what conditions these interactions can occur. After our findings, many questions remained unanswered. This review might provide a starting point for future research. Extended knowledge on the influence of blood flow on VWF and blood cell interactions can contribute to improved understanding of the variation in bleeding in patients with bleeding disorders.
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33
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Ariëns RA, Hunt BJ, Agbani EO, Ahnström J, Ahrends R, Alikhan R, Assinger A, Bagoly Z, Balduini A, Barbon E, Barrett CD, Batty P, Carneiro JDA, Chan W, de Maat M, de Wit K, Denis C, Ellis MH, Eslick R, Fu H, Hayward CPM, Ho‐Tin‐Noé B, Klok F, Kumar R, Leiderman K, Litvinov RI, Mackman N, McQuilten Z, Neal MD, Parker WAE, Preston RJS, Rayes J, Rezaie AR, Roberts LN, Rocca B, Shapiro S, Siegal DM, Sousa LP, Suzuki‐Inoue K, Zafar T, Zhou J. Illustrated State-of-the-Art Capsules of the ISTH 2022 Congress. Res Pract Thromb Haemost 2022; 6:e12747. [PMID: 35814801 PMCID: PMC9257378 DOI: 10.1002/rth2.12747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 05/27/2022] [Indexed: 11/13/2022] Open
Abstract
The ISTH London 2022 Congress is the first held (mostly) face-to-face again since the COVID-19 pandemic took the world by surprise in 2020. For 2 years we met virtually, but this year's in-person format will allow the ever-so-important and quintessential creativity and networking to flow again. What a pleasure and joy to be able to see everyone! Importantly, all conference proceedings are also streamed (and available recorded) online for those unable to travel on this occasion. This ensures no one misses out. The 2022 scientific program highlights new developments in hemophilia and its treatment, acquired and other inherited bleeding disorders, thromboinflammation, platelets and coagulation, clot structure and composition, fibrinolysis, vascular biology, venous thromboembolism, women's health, arterial thrombosis, pediatrics, COVID-related thrombosis, vaccine-induced thrombocytopenia with thrombosis, and omics and diagnostics. These areas are elegantly reviewed in this Illustrated Review article. The Illustrated Review is a highlight of the ISTH Congress. The format lends itself very well to explaining the science, and the collection of beautiful graphical summaries of recent developments in the field are stunning and self-explanatory. This clever and effective way to communicate research is revolutionary and different from traditional formats. We hope you enjoy this article and will be inspired by its content to generate new research ideas.
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Affiliation(s)
| | | | - Ejaife O. Agbani
- Department of Physiology and Pharmacology, Cumming School of MedicineUniversity of CalgaryCalgaryAlbertaCanada
| | | | - Robert Ahrends
- Institute of Analytical ChemistryUniversity of ViennaViennaAustria
| | - Raza Alikhan
- Haemostasis & ThrombosisUniversity Hospital of WalesCardiffUK
| | | | - Zsuzsa Bagoly
- Faculty of Medicine, Department of Laboratory Medicine, Division of Clinical Laboratory Sciences and ELKH‐DE Neurodegenerative and Cerebrovascular Research GroupUniversity of DebrecenDebrecenHungary
| | | | - Elena Barbon
- San Raffaele Telethon Institute for Gene TherapyIRCCS San Raffaele Scientific InstituteMilanItaly
| | - Christopher D. Barrett
- Division of Acute Care Surgery and Surgical Critical Care, Department of SurgeryUniversity of Nebraska Medical CenterOmahaNebraskaUSA,Koch Institute, Center for Precision Cancer MedicineMassachusetts Institute of TechnologyCambridgeMassachusettsUSA,Division of Surgical Critical Care, Department of Surgery, Boston University Medical CenterBoston University School of MedicineBostonMassachusettsUSA
| | | | | | - Wee Shian Chan
- University of British ColumbiaVancouverBritish ColumbiaCanada
| | - Moniek de Maat
- Department of HematologyErasmus MCRotterdamThe Netherlands
| | - Kerstin de Wit
- Queen’s University and McMaster UniversityKingstonONCanada
| | | | - Martin H. Ellis
- Hematology Institute and Blood Bank, Meir Medical Center and Sackler School of MedicineTel Aviv UniversityTel AvivIsrael
| | - Renee Eslick
- Haematology DepartmentCanberra HospitalGarranAustralian Capital TerritoryAustralia
| | - Hongxia Fu
- Division of Hematology, Department of MedicineUniversity of WashingtonSeattleWashingtonUSA
| | | | | | - Frederikus A. Klok
- Department of Medicine – Thrombosis and HemostasisLeiden University Medical CenterLeidenThe Netherlands
| | - Riten Kumar
- Dana Farber/Boston Children’s Cancer and Blood Disorders CenterBostonMassachusettsUSA
| | | | - Rustem I. Litvinov
- Department of Cell and Developmental BiologyUniversity of Pennsylvania School of MedicinePhiladelphiaPennsylvaniaUSA
| | - Nigel Mackman
- UNC Blood Research Center, Division of Hematology, Department of MedicineUniversity of North Carolina at Chapel HillChapel HillNorth CarolinaUSA
| | | | - Matthew D. Neal
- Trauma and Transfusion Medicine Research Center, Department of SurgeryUniversity of PittsburghPittsburghPennsylvaniaUSA
| | - William A. E. Parker
- Cardiovascular Research Unit, Northern General HospitalUniversity of SheffieldSheffieldUK
| | - Roger J. S. Preston
- Irish Centre for Vascular Biology, Department of Pharmacy & Biomolecular SciencesRoyal College of Surgeons in IrelandDublin 2Ireland
| | | | - Alireza R. Rezaie
- Cardiovascular Biology Research ProgramOklahoma Medical Research FoundationOklahoma CityOklahomaUSA
| | - Lara N. Roberts
- King’s Thrombosis Centre, Department of Haematological MedicineKing’s College Hospital NHS Foundation TrustLondonUK
| | - Bianca Rocca
- Department of Safety and Bioethics, Section of PharmacologyCatholic University School of MedicineRomeItaly
| | - Susan Shapiro
- Oxford University Hospitals NHS Foundation TrustOxfordUK,Radcliffe Department of MedicineOxford UniversityOxfordUK
| | - Deborah M. Siegal
- Ottawa Hospital Research Institute and University of OttawaOttawaOntarioCanada
| | - Lirlândia P. Sousa
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de FarmáciaUniversidade Federal de Minas GeraisBelo HorizonteBrazil
| | - Katsue Suzuki‐Inoue
- Department of Clinical and Laboratory MedicineUniversity of YamanashiYamanashiJapan
| | - Tahira Zafar
- Frontier Medical CollegeAbbotabadPakistan,Hemophilia Treatment CenterRawalpindiPakistan
| | - Jiaxi Zhou
- Institute of Hematology & Blood Diseases HospitalChinese Academy of Medical Sciences & Peking Union Medical CollegeTianjinChina
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Prakhya KS, Luo Y, Adkins J, Hu X, Wang QJ, Whiteheart SW. A sensitive and adaptable method to measure platelet-fibrin clot contraction kinetics. Res Pract Thromb Haemost 2022; 6:e12755. [PMID: 35873218 PMCID: PMC9301529 DOI: 10.1002/rth2.12755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 04/29/2022] [Accepted: 06/05/2022] [Indexed: 11/09/2022] Open
Abstract
Background Platelet‐fibrin clot contraction is critical for wound closure and maintenance of vessel patency, yet a molecular understanding of the process has lagged because of a lack of flexible quantitative assay systems capable of assaying multiple samples simultaneously. Objectives We devised a sensitive and inexpensive method to assess clot contraction kinetics under multiple conditions. Methods Clot contraction was measured using time‐lapse digital photography, automated image processing with customized software, and detailed kinetic analysis using available commercial programs. Results Our system was responsive to alterations in platelet counts and calcium, fibrinogen, and thrombin concentrations, and our analysis detected and defined three phases of platelet‐fibrin clot formation: initiation, contraction, and stabilization. Lag time, average contraction velocity, contraction extent, and area under the curve were readily calculated from the data. Using pharmacological agents (blebbistatin and eptifibatide), we confirmed the importance of myosin IIA and the interactions of integrin αIIbβ3‐fibrinogen/fibrin in clot contraction. As further proof of our system's utility, we showed how 2‐deoxyglucose affects contraction, demonstrating the importance of platelet bioenergetics, specifically glycolysis. Conclusions Our system is an adaptable platform for assessing the effects of multiple conditions and interventions on clot contraction kinetics in a regular laboratory setting, using readily available materials. The automated image processing software we developed will be made freely available for noncommercial uses. This assay system can be used to directly compare and define the effects of different treatments or genetic manipulations on platelet function and should provide a robust tool for future hemostasis/thrombosis research and therapeutic development.
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Affiliation(s)
| | - Ya Luo
- Gliasoft Milpitas California USA
| | - John Adkins
- Department of Molecular and Cellular Biochemistry, College of Medicine University of Kentucky Lexington Kentucky USA
| | | | - Qing Jun Wang
- Department of Ophthalmology and Visual Sciences, College of Medicine University of Kentucky Lexington Kentucky USA
| | - Sidney W Whiteheart
- Department of Molecular and Cellular Biochemistry, College of Medicine University of Kentucky Lexington Kentucky USA
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Chronic Immune Platelet Activation Is Followed by Platelet Refractoriness and Impaired Contractility. Int J Mol Sci 2022; 23:ijms23137336. [PMID: 35806341 PMCID: PMC9266422 DOI: 10.3390/ijms23137336] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 06/25/2022] [Accepted: 06/28/2022] [Indexed: 11/16/2022] Open
Abstract
Autoimmune diseases, including systemic lupus erythematosus (SLE), have a high risk of thrombotic and hemorrhagic complications associated with altered platelet functionality. We studied platelets from the blood of SLE patients and their reactivity. The surface expression of phosphatidylserine, P-selectin, and active integrin αIIbβ3 were measured using flow cytometry before and after platelet stimulation. Soluble P-selectin was measured in plasma. The kinetics of platelet-driven clot contraction was studied, as well as scanning and transmission electron microscopy of unstimulated platelets. Elevated levels of membrane-associated phosphatidylserine and platelet-attached and soluble P-selectin correlated directly with the titers of IgG, anti-dsDNA-antibodies, and circulating immune complexes. Morphologically, platelets in SLE lost their resting discoid shape, formed membrane protrusions and aggregates, and had a rough plasma membrane. The signs of platelet activation were associated paradoxically with reduced reactivity to a physiological stimulus and impaired contractility that revealed platelet exhaustion and refractoriness. Platelet activation has multiple pro-coagulant effects, and the inability to fully contract (retract) blood clots can be either a hemorrhagic or pro-thrombotic mechanism related to altered clot permeability, sensitivity of clots to fibrinolysis, obstructiveness, and embologenicity. Therefore, chronic immune platelet activation followed by secondary platelet dysfunction comprise an understudied pathogenic mechanism that supports hemostatic disorders in autoimmune diseases, such as SLE.
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36
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Wolberg AS, Sang Y. Fibrinogen and Factor XIII in Venous Thrombosis and Thrombus Stability. Arterioscler Thromb Vasc Biol 2022; 42:931-941. [PMID: 35652333 PMCID: PMC9339521 DOI: 10.1161/atvbaha.122.317164] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
As the third most common vascular disease, venous thromboembolism is associated with significant mortality and morbidity. Pathogenesis underlying venous thrombosis is still not fully understood. Accumulating data suggest fibrin network structure and factor XIII-mediated crosslinking are major determinants of venous thrombus mass, composition, and stability. Understanding the cellular and molecular mechanisms mediating fibrin(ogen) and factor XIII production and function and their ability to influence venous thrombogenesis and resolution may inspire new anticoagulant strategies that target these proteins to reduce or prevent venous thrombosis in certain at-risk patients. This article summarizes fibrinogen and factor XIII biology and current knowledge of their function during venous thromboembolism.
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Affiliation(s)
- Alisa S Wolberg
- Department of Pathology and UNC Blood Research Center, University of North Carolina, Chapel Hill
| | - Yaqiu Sang
- Department of Pathology and UNC Blood Research Center, University of North Carolina, Chapel Hill
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37
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Pancaldi F, Kim OV, Weisel JW, Alber M, Xu Z. Computational Biomechanical Modeling of Fibrin Networks and Platelet-Fiber Network Interactions. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2022; 22:100369. [PMID: 35386550 PMCID: PMC8979495 DOI: 10.1016/j.cobme.2022.100369] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Fibrin deformation and interaction of fibrin with other blood components play critical roles in hemostasis and thrombosis. In this review, computational and mathematical biomechanical models of fibrin network deformation and contraction at different spatio-temporal scales as well as challenges in developing and calibrating multiscale models are discussed. There are long standing challenges. For instance, applicability of models to identify and test potential mechanisms of the biomechanical processes mediating interactions between platelets and fiber networks in blood clot stretching and contraction needs to be examined carefully. How the structural and mechanical properties of major blood clot components influences biomechanical responses of the entire clot subjected to external forces, such as blood flow or vessel wall deformations needs to be investigated thoroughly.
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Affiliation(s)
- Francesco Pancaldi
- Department of Mathematics, University of California Riverside, Riverside, CA 92505, USA
- Center for Quantitative Modeling in Biology, University of California Riverside, Riverside, CA 92505, USA
| | - Oleg V. Kim
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
| | - John W. Weisel
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
| | - Mark Alber
- Department of Mathematics, University of California Riverside, Riverside, CA 92505, USA
- Center for Quantitative Modeling in Biology, University of California Riverside, Riverside, CA 92505, USA
| | - Zhiliang Xu
- Department of Applied and Computational Mathematics and Statistics, University of Notre Dame, IN 46556, USA
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38
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Trigani KT, DeCortin M, Diamond S. ADP and thromboxane inhibitors both reduce global contraction of clot length, while thromboxane inhibition attenuates internal aggregate contraction. TH OPEN 2022; 6:e135-e143. [PMID: 35707619 PMCID: PMC9192180 DOI: 10.1055/a-1832-9293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 04/14/2022] [Indexed: 11/10/2022] Open
Abstract
Platelet contractility drives clot contraction to enhance clot density and stability. Clot contraction is typically studied under static conditions, with fewer studies of wall-adherent platelet clots formed under flow. We tested the effect of inhibitors of ADP and/or thromboxane A2 (TXA2) signaling on clot contraction. Using an eight-channel microfluidic device, we perfused PPACK-treated whole blood (WB) ± acetylsalicylic acid (ASA), 2-methylthioAMP (2-MeSAMP), and/or MRS-2179 over collagen (100/s) for 7.5 min, then stopped flow to observe contraction for 7.5 minutes. Two automated imaging methods scored fluorescent platelet percent contraction over the no-flow observation period: (1) “global” measurement of clot length and (2) “local” changes in surface area coverage of the numerous platelet aggregates within the clot. Total platelet fluorescence intensity (FI) decreased with concomitant decrease in global aggregate contraction when ASA, 2-MeSAMP, and/or MRS-2179 were present. Total platelet FI and global aggregate contraction were highly correlated (
R2
= 0.87). In contrast, local aggregate contraction was more pronounced than global aggregate contraction across all inhibition conditions. However, ASA significantly reduced local aggregate contraction relative to conditions without TXA2 inhibition. P-selectin display was significantly reduced by ADP and TXA2 inhibition, but there was limited detection of global or local aggregate contraction in P-selectin-positive platelets across all conditions, as expected for densely packed “core” platelets. Our results demonstrate that global aggregate contraction is inhibited by ASA, 2-MeSAMP, and MRS-2179, while ASA more potently inhibited local aggregate contraction. These results help resolve how different platelet antagonists affect global and local clot structure and function.
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Affiliation(s)
- Kevin Timothy Trigani
- Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, United States
| | - Michael DeCortin
- Chemical & Biomolecular Engineering, University of Pennsylvania, Philadelphia, United States
| | - Scott Diamond
- Institute for Medicine and Engineering, U Penn Vagelos Research Laboratories, Philadelphia, United States
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39
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Gao Q, Qi P, Wang J, Hu S, Yang X, Fan J, Li L, Lu Y, Lu J, Chen J, Wang D. Effects of diabetes mellitus complicated by admission hyperglycemia on clot histological composition and ultrastructure in patients with acute ischemic stroke. BMC Neurol 2022; 22:130. [PMID: 35382802 PMCID: PMC8981928 DOI: 10.1186/s12883-022-02660-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 03/29/2022] [Indexed: 11/10/2022] Open
Abstract
Background Type 2 diabetes mellitus (T2DM) affects the occurrence and prognosis of acute ischemic stroke (AIS). However, the impact of diabetes on thrombus characteristics is unclear. The relationship between the composition and ultrastructure of clots and DM with admission hyperglycemia was investigated. Methods Consecutive patients with AIS who underwent endovascular thrombus retrieval between June 2017 and May 2021 were recruited. The thrombus composition and ultrastructure were evaluated using Martius scarlet blue stain and scanning electron microscopy. Clot perviousness was evaluated via thrombus attenuation increase on computed tomography angiography (CTA) versus non-contrast CT. Patients with admission hyperglycemia DM (ahDM) and those without DM (nonDM) were compared in terms of thrombus composition, ultrastructure, and perviousness. Results On admission, higher NIHSS scores (17 vs. 12, respectively, p = 0.015) was evident in ahDM patients. After the 90-day follow-up, the rates of excellent outcomes (mRS 0–1) were lower in patients with ahDM (16.6%, p = 0.038), but functional independence (mRS 0–2) and handicapped (mRS 3–5) were comparable between patients with ahDM and nonDM. The outcome of mortality was higher in patients with ahDM (33.3%, p = 0.046) than in nonDM patients. Clots in patients with ahDM had more fibrin (39.4% vs. 25.0%, respectively, p = 0.007), fewer erythrocyte components (21.2% vs. 41.5%, respectively, p = 0.043), equivalent platelet fraction (27.7% vs. 24.6%, respectively, p = 0.587), and higher WBC counts (4.6% vs. 3.3%, respectively, p = 0.004) than in nonDM patients. The percentage of polyhedral erythrocytes in thrombi was significantly higher in ahDM patients than in nonDM patients (68.9% vs. 45.6%, respectively, p = 0.007). The proportion of pervious clots was higher in patients nonDM than in patients with ahDM (82.61% vs. 40%, respectively, p = 0.026). Conclusion Patients with ahDM presented with greater stroke severity on admission and poorer functional outcomes after 3 months. Clots in patients with ahDM had more fibrin, leucocytes, and fewer erythrocyte components than in patients nonDM. The content of polyhedral erythrocytes and impervious clots proportion were significantly higher in thrombi of patients with AIS and ahDM. Further research is required to validate these findings.
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Affiliation(s)
- Qun Gao
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No.1 DaHua Road, Dong Dan, Beijing, 100730, People's Republic of China.,Graduate School of Peking Union Medical College, Beijing, China
| | - Peng Qi
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No.1 DaHua Road, Dong Dan, Beijing, 100730, People's Republic of China
| | - Junjie Wang
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No.1 DaHua Road, Dong Dan, Beijing, 100730, People's Republic of China
| | - Shen Hu
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No.1 DaHua Road, Dong Dan, Beijing, 100730, People's Republic of China
| | - Ximeng Yang
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No.1 DaHua Road, Dong Dan, Beijing, 100730, People's Republic of China
| | - Jingwen Fan
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No.1 DaHua Road, Dong Dan, Beijing, 100730, People's Republic of China.,Peking University Fifth School of Clinical Medicine, Beijing Hospital, Beijing, China
| | - Ling Li
- Department of Radiology, Beijing Hospital, National Center of Gerontology, Beijing, China.,Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Yao Lu
- Department of Radiology, Beijing Hospital, National Center of Gerontology, Beijing, China.,Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Jun Lu
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No.1 DaHua Road, Dong Dan, Beijing, 100730, People's Republic of China. .,Graduate School of Peking Union Medical College, Beijing, China.
| | - Juan Chen
- Department of Radiology, Beijing Hospital, National Center of Gerontology, Beijing, China. .,Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China.
| | - Daming Wang
- Department of Neurosurgery, Beijing Hospital, National Center of Gerontology, No.1 DaHua Road, Dong Dan, Beijing, 100730, People's Republic of China. .,Graduate School of Peking Union Medical College, Beijing, China.
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Freiherr von Seckendorff A, Delvoye F, Levant P, Solo Nomenjanahary M, Ollivier V, Bourrienne MC, Di Meglio L, Piotin M, Escalard S, Maier B, Hebert S, Smajda S, Redjem H, Mazighi M, Blanc R, Ho-Tin-Noé B, Désilles JP. Modeling Large Vessel Occlusion Stroke for the Evaluation of Endovascular Therapy According to Thrombus Composition. Front Neurol 2022; 12:815814. [PMID: 35153990 PMCID: PMC8829452 DOI: 10.3389/fneur.2021.815814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 12/22/2021] [Indexed: 11/26/2022] Open
Abstract
More than 40% of endovascular therapy (EVT) fail to achieve complete reperfusion of the territory of the occluded artery in patients with acute ischemic stroke (AIS). Understanding factors influencing EVT could help overcome its limitations. Our objective was to study the impact of thrombus cell composition on EVT procedures, using a simulation system for modeling thrombus-induced large vessel occlusion (LVO) in flow conditions. In an open comparative trial, we analyzed the behavior of size-standardized platelet-rich and red blood cells (RBC)-rich thrombi during simulated stent retriever-mediated EVT procedures. Sixteen simulated EVT procedures were performed (8 RBC- vs. 8 platelet-rich thrombi). Platelet-rich thrombi were associated with a higher number of stent retriever passes (p = 0.03) and a longer procedure duration (p = 0.02) compared to RBC-rich thrombi. Conversely, RBC-rich thrombi released more embolic fragments than platelet-rich thrombi (p = 0.004). Both RBC-rich and platelet-rich thrombi underwent drastic compaction after being injected into the in vitro circulation model, and histologic analyses showed that these EVT-retrieved thrombi displayed features comparable to those previously observed in thrombi from patients with AIS patients having LVO, including a marked structural dichotomy between RBC- and platelet-rich areas. Our results show that the injection of in vitro-produced thrombi in artificial cerebrovascular arterial networks is suitable for testing recanalization efficacy and the risk of embolization of EVT devices and strategies in association with thrombus cell composition.
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Affiliation(s)
- Aurélien Freiherr von Seckendorff
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - François Delvoye
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
| | - Paul Levant
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
| | - Mialitiana Solo Nomenjanahary
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Véronique Ollivier
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Marie-Charlotte Bourrienne
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Lucas Di Meglio
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Michel Piotin
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Simon Escalard
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
| | - Benjamin Maier
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Solène Hebert
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
| | - Stanislas Smajda
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
| | - Hocine Redjem
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
| | - Mikael Mazighi
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Raphael Blanc
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Benoit Ho-Tin-Noé
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Jean-Philippe Désilles
- Interventional Neuroradiology Department, Biological Resource Center, Hôpital Fondation Adolphe de Rothschild, Paris, France
- Université de Paris, Laboratory of Vascular Translational Science, U1148 Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
- *Correspondence: Jean-Philippe Désilles
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Resolving the missing link between single platelet force and clot contractile force. iScience 2022; 25:103690. [PMID: 35059605 PMCID: PMC8760458 DOI: 10.1016/j.isci.2021.103690] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/04/2021] [Accepted: 12/20/2021] [Indexed: 12/29/2022] Open
Abstract
Blood clot contraction plays an important role in wound healing and hemostasis. Although clot contraction is known to be driven by platelets, how single platelet forces relate to the forces generated by macroscopic clots remains largely unknown. Using our microfabricated high-throughput platelet contraction cytometer, we find that single platelets have an average force of 34 nN ( n = 10 healthy individuals). However, multiple bulk clot experiments predict a mean single platelet force lower than 0.5 nN. To resolve this discrepancy, we use a mesoscale computational model to probe the mechanism by which individual platelets induce forces in macroscopic clots. Our experimentally informed model shows that the number of platelets in the clot cross-section defines the net clot force. We provide a relationship between single platelet force and the clot force that is useful for better understanding of blood disorders associated with bleeding and thrombosis, and facilitates the development of platelet-based and platelet-mimetic biomaterials.
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Biomimetic platelet membrane-coated Nanoparticles for targeted therapy. Eur J Pharm Biopharm 2022; 172:1-15. [DOI: 10.1016/j.ejpb.2022.01.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 12/18/2021] [Accepted: 01/17/2022] [Indexed: 02/08/2023]
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Extent of intravital contraction of arterial and venous thrombi and pulmonary emboli. Blood Adv 2021; 6:1708-1718. [PMID: 34972200 PMCID: PMC8941457 DOI: 10.1182/bloodadvances.2021005801] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 11/29/2021] [Indexed: 11/20/2022] Open
Abstract
Ratio of compressed polyhedral to native biconcave RBCs in blood clots and thrombi is a “ruler” to measure extent of clot contraction. The extent of intravital contraction of ex vivo arterial and venous thrombi is associated with their origins, age, and embologenicity.
Blood clots and thrombi undergo platelet-driven contraction/retraction followed by structural rearrangements. We have established quantitative relationships between the composition of blood clots and extent of contraction to determine intravital contraction of thrombi and emboli based on their content. The composition of human blood clots and thrombi was quantified using histology and scanning electron microscopy. Contracting blood clots were segregated into the gradually shrinking outer layer that contains a fibrin-platelet mesh and the expanding inner portion with compacted red blood cells (RBCs). At 10% contraction, biconcave RBCs were partially compressed into polyhedral RBCs, which became dominant at 20% contraction and higher. The polyhedral/biconcave RBC ratio and the extent of contraction displayed an exponential relationship, which was used to determine the extent of intravital contraction of ex vivo thrombi, ranging from 30% to 50%. In venous thrombi, the extent of contraction decreased gradually from the older (head) to the younger (body, tail) parts. In pulmonary emboli, the extent of contraction was significantly lower than in the venous head but was similar to the body and tail, suggesting that the emboli originate from the younger portion(s) of venous thrombi. The extent of contraction in arterial cerebral thrombi was significantly higher than in the younger parts of venous thrombi (body, tail) and pulmonary emboli but was indistinguishable from the older part (head). A novel tool, named the “contraction ruler,” has been developed to use the composition of ex vivo thrombi to assess the extent of their intravital contraction, which contributes to the pathophysiology of thromboembolism.
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Cleavage of talin by calpain promotes platelet-mediated fibrin clot contraction. Blood Adv 2021; 5:4901-4909. [PMID: 34570183 PMCID: PMC9153048 DOI: 10.1182/bloodadvances.2021004582] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 07/07/2021] [Indexed: 11/21/2022] Open
Abstract
Calpain-catalyzed talin cleavage in platelets promotes fibrin clot contraction. Calpain cleaves talin in proximity to vinculin binding sites, likely initiating vinculin binding to talin to promote clot contraction.
Blood clot contraction is driven by traction forces generated by the platelet cytoskeleton that are transmitted to fibrin fibers via the integrin αIIbβ3. Here we show that clot contraction is impaired by inhibitors of the platelet cytosolic protease calpain. We used subtiligase-mediated labeling of amino termini and mass spectrometry to identify proteolytically cleaved platelet proteins involved in clot contraction. Of 32 calpain-cleaved proteins after TRAP stimulation, 14 were cytoskeletal, most prominently talin and vinculin. A complex of talin and vinculin constitutes a mechanosensitive clutch connecting integrins bound to the extracellular matrix with the actin cytoskeleton. Accordingly, we focused on talin and vinculin. Talin is composed of an N-terminal head domain and a C-terminal rod domain organized into a series of 4- and 5-helix bundles. The bundles contain 11 vinculin binding sites (VBSs), each of which is an α-helix packed into a bundle interior and requiring structural rearrangement to initiate vinculin binding. We detected 8 calpain-mediated cleavages in talin, 2 previously identified in unstructured regions and 6 in α-helical regions in proximity to a VBS. There is evidence in vitro that applying mechanical force across talin enables vinculin binding to the talin rod. However, we found that inhibiting platelet cytoskeletal contraction had no effect on talin cleavage, indicating that talin cleavage by calpain in platelets does not require cytoskeleton-generated tensile force. Therefore, it is likely that calpain acts in the later stages of clot retraction through focal adhesion disassembly.
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Pathare SJ, Eng W, Lee SJJ, Ramasubramanian AK. Fibrin prestress due to platelet aggregation and contraction increases clot stiffness. BIOPHYSICAL REPORTS 2021; 1:100022. [PMID: 36425457 PMCID: PMC9680775 DOI: 10.1016/j.bpr.2021.100022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 09/08/2021] [Indexed: 06/16/2023]
Abstract
Efficient hemorrhagic control is attained through the formation of strong and stable blood clots at the site of injury. Although it is known that platelet-driven contraction can dramatically influence clot stiffness, the underlying mechanisms by which platelets assist fibrin in resisting external loads are not understood. In this study, we delineate the contribution of platelet-fibrin interactions to clot tensile mechanics using a combination of new mechanical measurements, image analysis, and structural mechanics simulation. Based on uniaxial tensile test data using custom-made microtensometer and fluorescence microscopy of platelet aggregation and platelet-fibrin interactions, we show that integrin-mediated platelet aggregation and actomyosin-driven platelet contraction synergistically increase the elastic modulus of the clots. We demonstrate that the mechanical and geometric response of an active contraction model of platelet aggregates compacting vicinal fibrin is consistent with the experimental data. The model suggests that platelet contraction induces prestress in fibrin fibers and increases the effective stiffness in both cross-linked and noncross-linked clots. Our results provide evidence for fibrin compaction at discrete nodes as a major determinant of mechanical response to applied loads.
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Affiliation(s)
| | - Wilson Eng
- Department of Mechanical Engineering, San José State University, San José, California
| | - Sang-Joon J. Lee
- Department of Mechanical Engineering, San José State University, San José, California
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Bannish BE, Hudson NE. The Utility and Potential of Mathematical Models in Predicting Fibrinolytic Outcomes. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2021; 20:100337. [PMID: 34957356 PMCID: PMC8694003 DOI: 10.1016/j.cobme.2021.100337] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The enzymatic degradation of blood clots, fibrinolysis, is an important part of a healthy hemostatic system. If intrinsic fibrinolysis is ineffective, thrombolysis - the clinically-induced enzymatic degradation of blood clots - may be necessary to treat life-threatening conditions. In this review we discuss recent models of fibrinolysis and thrombolysis, and open questions that could be resolved through modeling and modeling-experimental collaboration. In particular, we focus on 2- and 3-dimensional models that can be used to study effects of fibrin network structure and realistic blood vessel geometries on the phenomena underlying lytic outcomes. Significant open questions such as the role of clot contraction, network and inherent fiber tension, and fibrinolytic inhibitors in lysis could benefit from mathematical models aimed at understanding the underlying biological mechanisms.
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Affiliation(s)
- Brittany E. Bannish
- Department of Mathematics and Statistics, University of Central Oklahoma, Edmond, OK 73034, USA
- Center for Interdisciplinary Biomedical Education and Research, University of Central Oklahoma, Edmond, OK 73034, USA
| | - Nathan E. Hudson
- Nathan E. Hudson, Department of Physics, East Carolina University, Greenville, NC 27858, USA
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Tutwiler V, Litvinov RI, Protopopova A, Nagaswami C, Villa C, Woods E, Abdulmalik O, Siegel DL, Russell JE, Muzykantov VR, Lam WA, Myers DR, Weisel JW. Pathologically stiff erythrocytes impede contraction of blood clots: Reply to comment. J Thromb Haemost 2021; 19:2894-2895. [PMID: 34668295 PMCID: PMC10031937 DOI: 10.1111/jth.15511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 08/24/2021] [Indexed: 10/20/2022]
Affiliation(s)
- Valerie Tutwiler
- Department of Cell and Developmental Biology, University of
Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
- Department of Biomedical Engineering, Rutgers – The
State University of New Jersey, Piscataway, New Jersey, USA
| | - Rustem I. Litvinov
- Department of Cell and Developmental Biology, University of
Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
- Institute of Fundamental Medicine and Biology, Kazan
Federal University, Kazan, Russia
| | - Anna Protopopova
- Department of Cell and Developmental Biology, University of
Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Chandrasekaran Nagaswami
- Department of Cell and Developmental Biology, University of
Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Carlos Villa
- Department of Pathology and Laboratory Medicine, University
of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Eric Woods
- Max- Planck- Institut für Eisenforschung GmbH
Düsseldorf, Düsseldorf, Germany
| | | | - Don L. Siegel
- Department of Pathology and Laboratory Medicine, University
of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - J. Eric Russell
- Department of Medicine, University of Pennsylvania Perelman
School of Medicine, Philadelphia, Pennsylvania, USA
| | - Vladimir R. Muzykantov
- Department of Pharmacology, University of Pennsylvania
Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Wilbur A. Lam
- The Wallace H. Coulter Department of Biomedical
Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia,
USA
| | - David R. Myers
- The Wallace H. Coulter Department of Biomedical
Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia,
USA
| | - John W. Weisel
- Department of Cell and Developmental Biology, University of
Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
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Yadav P, Beura SK, Panigrahi AR, Singh SK. Quantification and optimization of clot retraction in washed human platelets by Sonoclot coagulation analysis. Int J Lab Hematol 2021; 44:177-185. [PMID: 34609044 DOI: 10.1111/ijlh.13710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/19/2021] [Accepted: 09/07/2021] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Clot retraction is a pivotal process for haemostasis, where platelets develop a contractile force in fibrin meshwork and lead to the increased rigidity of clot. The pathophysiological alteration in contractile forces generated by the platelet-fibrin meshwork can lead to haemostatic disorders. Regardless of its utter significance, clot retraction remains a limited understood process owing to lack of quantification methodology. Sonoclot analysis is a point-of-care technique used in clinical laboratories for whole blood analysis that provides in vitro qualitative as well as quantitative assessment of coagulation process from initial fibrin formation to clot retraction. METHODS Human washed platelets were isolated by differential centrifugation method and analysed via optical imaging, microscopy and Sonoclot analysis using 1-2 × 108 /mL of washed platelets, 1 U/mL of thrombin, 1 mg/mL of fibrinogen and 1 mM of calcium chloride. RESULTS In this study, we demonstrate the novelty of this instrument in the quantitative evaluation of clot retraction in washed platelets and attempted to optimize the reference range of Sonoclot parameters including ACT - 87.3 ± 20.997, CR - 16.23 ± 3.538 and PF - 3.57 ± 0.629, (n = 10). DISCUSSION Sonoclot analysis provides a simple and quantitative method to better understand in vitro clot retraction and its modulation by retraction components including platelet count, fibrinogen and platelet-fibrin interaction compared with existing conventional methods. Sonoclot may prove to be a valuable tool in thrombus biology research to understand fundamental basis of blood clot retraction.
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Affiliation(s)
- Pooja Yadav
- Department of Zoology, School of Biological Sciences, Central University of Punjab, Bathinda, India
| | - Samir K Beura
- Department of Zoology, School of Biological Sciences, Central University of Punjab, Bathinda, India
| | - Abhishek R Panigrahi
- Department of Zoology, School of Biological Sciences, Central University of Punjab, Bathinda, India
| | - Sunil K Singh
- Department of Zoology, School of Biological Sciences, Central University of Punjab, Bathinda, India
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Rausch MK, Parekh SH, Dortdivanlioglu B, Rosales AM. Synthetic hydrogels as blood clot mimicking wound healing materials. PROGRESS IN BIOMEDICAL ENGINEERING (BRISTOL, ENGLAND) 2021; 3:042006. [PMID: 35822083 PMCID: PMC9273113 DOI: 10.1088/2516-1091/ac23a4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Excessive bleeding-or hemorrhage-causes millions of civilian and non-civilian casualties every year. Additionally, wound sequelae, such as infections, are a significant source of chronic morbidity, even if the initial bleeding is successfully stopped. To treat acute and chronic wounds, numerous wound healing materials have been identified, tested, and adopted. Among them are topical dressings, such as gauzes, as well as natural and biomimetic materials. However, none of these materials successfully mimic the complex and dynamic properties of the body's own wound healing material: the blood clot. Specifically, blood clots exhibit complex mechanical and biochemical properties that vary across spatial and temporal scales to guide the wound healing response, which make them the ideal wound healing material. In this manuscript, we review blood clots' complex mechanical and biochemical properties, review current wound healing materials, and identify opportunities where new materials can provide additional functionality, with a specific focus on hydrogels. We highlight recent developments in synthetic hydrogels that make them capable of mimicking a larger subset of blood clot features: as plugs and as stimuli for tissue repair. We conclude that future hydrogel materials designed to mimic blood clot biochemistry, mechanics, and architecture can be combined with exciting platelet-like particles to serve as hemostats that also promote the biological wound healing response. Thus, we believe synthetic hydrogels are ideal candidates to address the clear need for better wound healing materials.
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Affiliation(s)
- Manuel K. Rausch
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX 78712, United States of America
- Department of Aerospace Engineering & Engineering Mechanics, University of Texas at Austin, Austin, TX 78712, United States of America
- Oden Institute for Computational Engineering and Sciences, University of Texas at Austin, Austin, TX 78712, United States of America
- Authors to whom any correspondence should be addressed. , , and
| | - Sapun H. Parekh
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX 78712, United States of America
- Authors to whom any correspondence should be addressed. , , and
| | - Berkin Dortdivanlioglu
- Oden Institute for Computational Engineering and Sciences, University of Texas at Austin, Austin, TX 78712, United States of America
- Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, TX 78712, United States of America
- Authors to whom any correspondence should be addressed. , , and
| | - Adrianne M. Rosales
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, TX 78712, United States of America
- Authors to whom any correspondence should be addressed. , , and
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Size-Related Differences in Computed Tomography Markers of Hematoma Expansion in Acute Intracerebral Hemorrhage. Neurocrit Care 2021; 36:602-611. [PMID: 34590291 DOI: 10.1007/s12028-021-01347-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 09/01/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Noncontrast computed tomography (NCCT) markers for hematoma expansion (HE) in intracerebral hemorrhage (ICH) are difficult to be found in small ICHs, of which can also expand. We aimed to investigate whether there were size-related differences in the prevalence of NCCT markers and their association with HE. METHODS This retrospective analysis of prospectively collected stroke registry included 267 consecutive patients with ICH who underwent baseline NCCT within 12 h of onset. Qualitative NCCT markers, including heterogeneous density and irregular shape, were assessed. Hematoma density, defined as mean Hounsfield unit of hematoma, and hematoma volume were measured by semiautomated planimetry. Hematoma volume was categorized as small (≤ 10 ml) and large (> 10 ml). Associations of NCCT markers with HE were analyzed using multivariable logistic regression analyses. The model performances of NCCT markers and hematoma density were compared using receiver operating characteristic curves. RESULTS Hematoma expansion occurred in 29.9% of small ICHs and 35.5% of large ICHs. Qualitative NCCT markers were less frequently observed in small ICHs. Heterogeneous density, irregular shape, and hematoma density were associated with HE in small ICH (adjusted odds ratios [95% confidence interval] 3.94 [1.50-10.81], 4.23 [1.73-10.81], and 0.72 [0.60-0.84], respectively), and hematoma density was also related to HE in large ICH (0.84 [0.73-0.97). The model performance was significantly improved in small ICHs when hematoma density was added to the baseline model (DeLong's test, p = 0.02). CONCLUSIONS The prevalence of NCCT markers and their association with HE differed according to hematoma volume. Quantitative hematoma density was associated with HE, regardless of hematoma size.
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