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Han D, Sun W, Clark KP, Griffith BP, Wu ZJ. Investigation of the role of von Willebrand factor in shear-induced platelet activation and functional alteration under high non-physiological shear stress. Artif Organs 2024; 48:514-524. [PMID: 38112069 PMCID: PMC11023789 DOI: 10.1111/aor.14698] [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: 09/11/2023] [Revised: 11/10/2023] [Accepted: 12/06/2023] [Indexed: 12/20/2023]
Abstract
BACKGROUND von Willebrand factor (vWF) plays a crucial role in physiological hemostasis through platelet and subendothelial collagen adhesion. However, its role in shear-induced platelet activation and functional alteration under non-physiological conditions common to blood-contacting medical devices (BCMDs) is not well investigated. METHODS Fresh healthy human blood was treated with an anti-vWF antibody to block vWF-GPIbα interaction. Untreated blood was used as a control. They were exposed to three levels of non-physiological shear stress (NPSS) (75, 125, and 175 Pa) through a shearing device with an exposure time of 0.5 s to mimic typical shear conditions in BCMDs. Flow cytometric assays were used to measure the expression levels of PAC-1 and P-Selectin and platelet aggregates for platelet activation and the expression levels of GPIbα, GPIIb/IIIa, and GPVI for receptor shedding. Collagen/ristocetin-induced platelet aggregation capacity was characterized by aggregometry. RESULTS The levels of platelet activation and aggregates increased with increasing NPSS in the untreated blood. More receptors were lost with increasing NPSS, resulting in a decreased capacity of collagen/ristocetin-induced platelet aggregation. In contrast, the increase in platelet activation and aggregates after exposure to NPSS, even at the highest level of NPSS, was significantly lower in treated blood. Nevertheless, there was no notable difference in receptor shedding, especially for GPIIb/IIIa and GPVI, between the two blood groups at the same level of NPSS. The block of vWF exacerbated the decreased capacity of collagen/ristocetin-induced platelet aggregation. CONCLUSIONS High NPSS activates platelets mainly by enhancing the vWF-GPIbα interaction. Platelet activation and receptor shedding induced by high NPSS likely occur through different pathways.
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Affiliation(s)
- Dong Han
- Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Wenji Sun
- Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Kiersten P Clark
- Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Bartley P Griffith
- Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Zhongjun J Wu
- Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
- Fischell Department of Bioengineering, A. James Clark School of Engineering, University of Maryland, College Park, Maryland, USA
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2
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Salikhova TY, Pushin DM, Nesterenko IV, Biryukova LS, Guria GT. Patient specific approach to analysis of shear-induced platelet activation in haemodialysis arteriovenous fistula. PLoS One 2022; 17:e0272342. [PMID: 36191008 PMCID: PMC9529124 DOI: 10.1371/journal.pone.0272342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 07/19/2022] [Indexed: 11/29/2022] Open
Abstract
Shear-induced platelet activation (SIPAct) is an important mechanism of thrombosis initiation under high blood flow. This mechanism relies on the interaction of platelets with the von Willebrand factor (VWF) capable of unfolding under high shear stress. High shear stress occurs in the arteriovenous fistula (AVF) commonly used for haemodialysis. A novel patient-specific approach for the modelling of SIPAct in the AVF was proposed. This enabled us to estimate the SIPAct level via computational fluid dynamics. The suggested approach was applied for the SIPAct analysis in AVF geometries reconstructed from medical images. The approach facilitates the determination of the SIPAct level dependence on both biomechanical (AVF flow rate) and biochemical factors (VWF multimer size). It was found that the dependence of the SIPAct level on the AVF flow rate can be approximated by a power law. The critical flow rate was a decreasing function of the VWF multimer size. Moreover, the critical AVF flow rate highly depended on patient-specific factors, e.g., the vessel geometry. This indicates that the approach may be adopted to elucidate patient-specific thrombosis risk factors in haemodialysis patients.
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Affiliation(s)
- Tatiana Yu Salikhova
- National Medical Research Center for Hematology, Moscow, Russia
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Denis M. Pushin
- National Medical Research Center for Hematology, Moscow, Russia
| | | | | | - Georgy Th Guria
- National Medical Research Center for Hematology, Moscow, Russia
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
- * E-mail:
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3
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Karolczak K, Guligowska A, Kostanek J, Soltysik B, Kostka T, Watala C. The amino acid content in the daily diet of seniors negatively correlates with the degree of platelet aggregation in a sex- and agonist-specific manner. Aging (Albany NY) 2022; 14:7240-7262. [PMID: 35985680 PMCID: PMC9550244 DOI: 10.18632/aging.204229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 07/27/2022] [Indexed: 11/25/2022]
Abstract
Aging is a significant risk factor for the development of thrombotic diseases, dependent on blood platelet reactivity. However, the risk of thrombosis also appears to be significantly modulated by dietary nutrient content. The aim of the current study was to assess the relationship between the amount of amino acids present in the daily diet (not supplemented) and the reactivity of blood platelets to arachidonate, collagen and ADP in 246 women and men aged 60–65 years. Platelet reactivity was tested using whole blood impedance aggregometry. Amino acid intake was assessed with a 24-hour Recall Questionnaire and calculated with Dieta 5.0 software. Older subjects receiving higher amounts of all essential amino acids with their daily diet exhibit significantly lower platelet responsiveness to AA-, COL- and ADP in a sex-specific manner: dietary amino acid content was more closely associated with AA- and, to some extent, ADP-induced platelet reactivity in women, and with COL-induced platelet aggregability in men. Therefore, dietary amino acid content may be a novel factor responsible for attenuating platelet reactivity in a sex- and agonist-specific manner.
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Affiliation(s)
- Kamil Karolczak
- Department of Haemostatic Disorders, Medical University of Lodz, Lodz, Poland
| | - Agnieszka Guligowska
- Department of Geriatrics, Healthy Aging Research Center (HARC), Medical University of Lodz, Lodz, Poland
| | - Joanna Kostanek
- Department of Haemostatic Disorders, Medical University of Lodz, Lodz, Poland
| | - Bartlomiej Soltysik
- Department of Geriatrics, Healthy Aging Research Center (HARC), Medical University of Lodz, Lodz, Poland
| | - Tomasz Kostka
- Department of Geriatrics, Healthy Aging Research Center (HARC), Medical University of Lodz, Lodz, Poland
| | - Cezary Watala
- Department of Haemostatic Disorders, Medical University of Lodz, Lodz, Poland
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4
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Han D, Zhang J, Griffith BP, Wu ZJ. Models of Shear-Induced Platelet Activation and Numerical Implementation With Computational Fluid Dynamics Approaches. J Biomech Eng 2022; 144:1119644. [PMID: 34529037 DOI: 10.1115/1.4052460] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Indexed: 12/17/2022]
Abstract
Shear-induced platelet activation is one of the critical outcomes when blood is exposed to elevated shear stress. Excessively activated platelets in the circulation can lead to thrombus formation and platelet consumption, resulting in serious adverse events such as thromboembolism and bleeding. While experimental observations reveal that it is related to the shear stress level and exposure time, the underlying mechanism of shear-induced platelet activation is not fully understood. Various models have been proposed to relate shear stress levels to platelet activation, yet most are modified from the empirically calibrated power-law model. Newly developed multiscale platelet models are tested as a promising approach to capture a single platelet's dynamic shape during activation, but it would be computationally expensive to employ it for a large-scale analysis. This paper summarizes the current numerical models used to study the shear-induced platelet activation and their computational applications in the risk assessment of a particular flow pattern and clot formation prediction.
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Affiliation(s)
- Dong Han
- Department of Surgery, University of Maryland School of Medicine, 10 South Pine Street, MSTF 436, Baltimore, MD 21201
| | - Jiafeng Zhang
- Department of Surgery, University of Maryland School of Medicine, 10 South Pine Street, MSTF 436, Baltimore, MD 21201
| | - Bartley P Griffith
- Department of Surgery, University of Maryland School of Medicine, 10 South Pine Street, MSTF 436, Baltimore, MD 21201
| | - Zhongjun J Wu
- Department of Surgery, University of Maryland School of Medicine, 10 South Pine Street, MSTF 436, Baltimore, MD 21201; Fischell Department of Bioengineering, A. James Clark School of Engineering, University of Maryland, College Park, MD 20742
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5
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Wang R, Dai H. Association of platelet count with all-cause mortality from acute respiratory distress syndrome: A cohort study. J Clin Lab Anal 2022; 36:e24378. [PMID: 35358347 PMCID: PMC9102613 DOI: 10.1002/jcla.24378] [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: 03/05/2022] [Revised: 03/15/2022] [Accepted: 03/18/2022] [Indexed: 11/13/2022] Open
Abstract
Background The purpose of this study was to investigate whether platelet count was associated with mortality in acute respiratory distress syndrome (ARDS) patients. Methods We analyzed patients with ARDS from Multi‐parameter Intelligent Monitoring in Intensive Care Database III (MIMIC‐III). Platelet count was measured at the time of intensive care unit (ICU) admission. The cox proportional hazard model and subgroup analysis were used to determine the relationship between the platelet count and mortality of ARDS, as well as the consistency of its association. The primary outcome of this study was 365‐day mortality from the date of ICU admission. Result This study enrolled a total of 395 critically ill patients with ARDS. After adjustment for age, gender and ethnicity, the multivariate cox regression model showed that the hazard ratios (HRs) (95% confidence intervals [CIs]) of platelet count <192 × 109/L and >296 × 109/L were 2.08 (1.43, 3.04) and 1.35 (0.91, 2.01), respectively, compared with the reference (192–296 ×109/L). After adjusting for confounding factors, lower platelet count (<192 × 109/L) was associated with increased mortality (adjusted HR, 1.71; 95% CI 1.06–2.76, p = 0.0284). However, there was no similar trend in the 30‐day (adjusted HR,1.02; 95% CI 0.54–1.94) or 90‐day (adjusted HR, 1.65; 95% CI 0.94–2.89) mortality. In the subgroup analysis, lower platelet count showed significant interactions with specific populations (p interaction = 0.0413), especially in patients with atrial fibrillation. Conclusion Taken together, our analysis showed that platelet count is an independent predictor of mortality in critically ill patients with ARDS.
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Affiliation(s)
- Rennv Wang
- Emergency Department, Affiliated Zhejiang Hospital of Zhejiang University School of Medical, Hangzhou, Zhejiang, China
| | - Haiwen Dai
- Emergency Department, Affiliated Zhejiang Hospital of Zhejiang University School of Medical, Hangzhou, Zhejiang, China
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6
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Distribution and history of extensional stresses on vWF surrogate molecules in turbulent flow. Sci Rep 2022; 12:171. [PMID: 34997036 PMCID: PMC8742075 DOI: 10.1038/s41598-021-04034-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 12/13/2021] [Indexed: 11/17/2022] Open
Abstract
The configuration of proteins is critical for their biochemical behavior. Mechanical stresses that act on them can affect their behavior leading to the development of decease. The von Willebrand factor (vWF) protein circulating with the blood loses its efficacy when it undergoes non-physiological hemodynamic stresses. While often overlooked, extensional stresses can affect the structure of vWF at much lower stress levels than shear stresses. The statistical distribution of extensional stress as it applies on models of the vWF molecule within turbulent flow was examined here. The stress on the molecules of the protein was calculated with computations that utilized a Lagrangian approach for the determination of the molecule trajectories in the flow filed. The history of the stresses on the proteins was also calculated. Two different flow fields were considered as models of typical flows in cardiovascular mechanical devises, one was a Poiseuille flow and the other was a Poiseuille–Couette flow field. The data showed that the distribution of stresses is important for the design of blood flow devices because the average stress can be below the critical value for protein damage, but tails of the distribution can be outside the critical stress regime.
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Manning KB, Nicoud F, Shea SM. Mathematical and Computational Modeling of Device-Induced Thrombosis. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2021; 20:100349. [PMID: 35071850 PMCID: PMC8769491 DOI: 10.1016/j.cobme.2021.100349] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Given the extensive and routine use of cardiovascular devices, a major limiting factor to their success is the thrombotic rate that occurs. This both poses direct risk to the patient and requires counterbalancing with anticoagulation and other treatment strategies, contributing additional risks. Developing a better understanding of the mechanisms of device-induced thrombosis to aid in device design and medical management of patients is critical to advance the ubiquitous use and durability. Thus, mathematical and computational modelling of device-induced thrombosis has received significant attention recently, but challenges remain. Additional areas that need to be explored include microscopic/macroscopic approaches, reconciling physical and numerical timescales, immune/inflammatory responses, experimental validation, and incorporating pathologies and blood conditions. Addressing these areas will provide engineers and clinicians the tools to provide safe and effective cardiovascular devices.
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Affiliation(s)
- Keefe B. Manning
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, USA
| | - Franck Nicoud
- CNRS, IMAG, Université de Montpellier, Montpellier, France
| | - Susan M. Shea
- Division of Critical Care Medicine, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
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Prikhodko IV, Guria GT. Dynamic Effects in Nucleation of Receptor Clusters. ENTROPY (BASEL, SWITZERLAND) 2021; 23:1245. [PMID: 34681969 PMCID: PMC8534492 DOI: 10.3390/e23101245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 09/21/2021] [Accepted: 09/22/2021] [Indexed: 11/16/2022]
Abstract
Nucleation theory has been widely applied for the interpretation of critical phenomena in nonequilibrium systems. Ligand-induced receptor clustering is a critical step of cellular activation. Receptor clusters on the cell surface are treated from the nucleation theory point of view. The authors propose that the redistribution of energy over the degrees of freedom is crucial for forming each new bond in the growing cluster. The expression for a kinetic barrier for new bond formation in a cluster was obtained. The shape of critical receptor clusters seems to be very important for the clustering on the cell surface. The von Neumann entropy of the graph of bonds is used to determine the influence of the cluster shape on the kinetic barrier. Numerical studies were carried out to assess the dependence of the barrier on the size of the cluster. The asymptotic expression, reflecting the conditions necessary for the formation of receptor clusters, was obtained. Several dynamic effects were found. A slight increase of the ligand mass has been shown to significantly accelerate the nucleation of receptor clusters. The possible meaning of the obtained results for medical applications is discussed.
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Affiliation(s)
- Ivan V. Prikhodko
- National Research Center for Hematology, 125167 Moscow, Russia;
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Georgy Th. Guria
- National Research Center for Hematology, 125167 Moscow, Russia;
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
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9
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Avdonin PP, Tsvetaeva NV, Goncharov NV, Rybakova EY, Trufanov SK, Tsitrina AA, Avdonin PV. Von Willebrand Factor in Health and Disease. BIOCHEMISTRY (MOSCOW), SUPPLEMENT SERIES A: MEMBRANE AND CELL BIOLOGY 2021. [DOI: 10.1134/s1990747821040036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Abstract—
Von Willebrand factor (vWF), the key component of hemostasis, is synthesized in endothelial cells and megakaryocytes and released into the blood as high molecular weight multimeric glycoproteins weighing up to 20 million Daltons. Blood plasma metalloprotease ADAMTS13 cleaves ultra-large vWF multimers to smaller multimeric and oligomeric molecules. The vWF molecules attach to the sites of damage at the surface of arterioles and capillaries and unfold under conditions of shear stress. On the unfolded vWF molecule, the regions interacting with receptors on the platelet membrane are exposed. After binding to the vWF filaments, platelets are activated; platelets circulating in the vessels are additionally attached to them, leading to thrombus formation, blocking of microvessels, and cessation of bleeding. This review describes the history of the discovery of vWF, presents data on the mechanisms of vWF secretion and its structure, and characterizes the processes of vWF metabolism in the body under normal and pathological conditions.
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10
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Faustino EVS, Raffini LJ, Hanson SJ, Cholette JM, Pinto MG, Li S, Kandil SB, Nellis ME, Shabanova V, Silva CT, Tala JA, McPartland T, Spinella PC. Age-Dependent Heterogeneity in the Efficacy of Prophylaxis With Enoxaparin Against Catheter-Associated Thrombosis in Critically Ill Children: A Post Hoc Analysis of a Bayesian Phase 2b Randomized Clinical Trial. Crit Care Med 2021; 49:e369-e380. [PMID: 33566465 PMCID: PMC7979442 DOI: 10.1097/ccm.0000000000004848] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
OBJECTIVES We explored the age-dependent heterogeneity in the efficacy of prophylaxis with enoxaparin against central venous catheter-associated deep venous thrombosis in critically ill children. DESIGN Post hoc analysis of a Bayesian phase 2b randomized clinical trial. SETTING Seven PICUs. PATIENTS Children less than 18 years old with newly inserted central venous catheter. INTERVENTIONS Enoxaparin started less than 24 hours after insertion of central venous catheter and adjusted to anti-Xa level of 0.2-0.5 international units/mL versus usual care. MEASUREMENTS AND MAIN RESULTS Of 51 children randomized, 24 were infants less than 1 year old. Risk ratios of central venous catheter-associated deep venous thrombosis with prophylaxis with enoxaparin were 0.98 (95% credible interval, 0.37-2.44) in infants and 0.24 (95% credible interval, 0.04-0.82) in older children greater than or equal to 1 year old. Infants and older children achieved anti-Xa level greater than or equal to 0.2 international units/mL at comparable times. While central venous catheter was in situ, endogenous thrombin potential, a measure of thrombin generation, was 223.21 nM.min (95% CI, 8.78-437.64 nM.min) lower in infants. Factor VIII activity, a driver of thrombin generation, was also lower in infants by 45.1% (95% CI, 15.7-74.4%). Median minimum platelet count while central venous catheter was in situ was higher in infants by 39 × 103/mm3 (interquartile range, 17-61 × 103/mm3). Central venous catheter:vein ratio was not statistically different. Prophylaxis with enoxaparin was less efficacious against central venous catheter-associated deep venous thrombosis at lower factor VIII activity and at higher platelet count. CONCLUSIONS The relatively lesser contribution of thrombin generation on central venous catheter-associated thrombus formation in critically ill infants potentially explains the age-dependent heterogeneity in the efficacy of prophylaxis with enoxaparin.
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Affiliation(s)
| | - Leslie J Raffini
- Department of Pediatrics, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA
| | - Sheila J Hanson
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI
| | - Jill M Cholette
- Department of Pediatrics, University of Rochester Golisano Children's Hospital, Rochester, NY
| | - Matthew G Pinto
- Department of Pediatrics, New York Medical College, Maria Fareri Children's Hospital, Valhalla, NY
| | - Simon Li
- Department of Pediatrics, New York Medical College, Maria Fareri Children's Hospital, Valhalla, NY
| | - Sarah B Kandil
- Department of Pediatrics, Yale School of Medicine, New Haven, CT
| | - Marianne E Nellis
- Department of Pediatrics, NY Presbyterian Hospital/Weill Cornell Medicine, New York, NY
| | | | - Cicero T Silva
- Department of Diagnostic Radiology, Yale School of Medicine, New Haven, CT
| | - Joana A Tala
- Pediatric Intensive Care Unit, Yale-New Haven Children's Hospital, New Haven, CT
| | - Tara McPartland
- Yale Center for Clinical Investigation, Yale School of Medicine, New Haven, CT
| | - Philip C Spinella
- Department of Pediatrics, Washington University in St. Louis, St. Louis, MO
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Nakajima Y, Yada K, Ogiwara K, Furukawa S, Shimonishi N, Shima M, Nogami K. A microchip flow-chamber assay screens congenital primary hemostasis disorders. Pediatr Int 2021; 63:160-167. [PMID: 32640065 DOI: 10.1111/ped.14378] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/04/2020] [Accepted: 07/02/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Von Willebrand disease (VWD) and platelet function disorders (PFDs) are congenital bleeding disorders caused by primary hemostasis defects. Platelet function tests are time-consuming and require considerable amounts of blood sample, and there have been no easy-to-use assays for assessing platelet function quickly and sensitively. We report the usefulness of a microchip flow-chamber system (T-TAS® ) for detecting and/or predicting clinical severity in patients with VWD type 1 and type 2N and platelet storage pool disease. Here, we developed an application of a screening assay for primary hemostasis disorders. METHODS Microchips coated with collagen (PL-chip) and collagen/thromboplastin (AR-chip) were utilized to evaluate platelet thrombus formation (PTF) at high shear and fibrin-rich PTF at low shear, respectively, in whole blood samples from 22 patients with VWD (16 type 2A, four type 2B, two type 3) and four patients with PFDs (two BSS, two Glanzmann thrombasthenia). The time-to-increase by 10 kPa (T10 ) was calculated from flow pressure curves. Also, whole blood-induced platelet aggregation was assessed using Multiplate® analysis. RESULTS PL-chip T10 values ≥10 min successfully distinguished patients with all types of VWD and PFDs from healthy controls, irrespective of age, bleeding scores, and von Willebrand factor levels. However, AR-chip assay incompletely distinguished between type 2A patients and healthy ones. Multiplate analysis permitted screening of PFDs and type 3 VWD, but values in type 2A partially overlapped with those in controls. PL-chip assay did not reflect the clinical severity in these patients. CONCLUSIONS T-TAS with PL-chip could be a quick screening tool for congenital primary hemostasis disorder, VWD, and PFDs.
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Affiliation(s)
- Yuto Nakajima
- Department of Pediatrics, Nara Medical University, Kashihara, Nara, Japan
| | - Koji Yada
- Department of Pediatrics, Nara Medical University, Kashihara, Nara, Japan.,The Course of Hemophilia Education, Nara Medical University, Kashihara, Nara, Japan
| | - Kenichi Ogiwara
- Department of Pediatrics, Nara Medical University, Kashihara, Nara, Japan
| | - Shoko Furukawa
- Department of Pediatrics, Nara Medical University, Kashihara, Nara, Japan.,The Course of Thrombosis and Hemostasis Molecular Pathology, Nara Medical University, Kashihara, Nara, Japan
| | - Naruto Shimonishi
- Department of Pediatrics, Nara Medical University, Kashihara, Nara, Japan
| | - Midori Shima
- Department of Pediatrics, Nara Medical University, Kashihara, Nara, Japan
| | - Keiji Nogami
- Department of Pediatrics, Nara Medical University, Kashihara, Nara, Japan
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12
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Pushin DM, Salikhova TY, Zlobina KE, Guria GT. Platelet activation via dynamic conformational changes of von Willebrand factor under shear. PLoS One 2020; 15:e0234501. [PMID: 32525962 PMCID: PMC7289367 DOI: 10.1371/journal.pone.0234501] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 05/26/2020] [Indexed: 01/10/2023] Open
Abstract
Shear-induced conformational changes of von Willebrand factor (VWF) play an important role in platelet activation. A novel approach describing VWF unfolding on the platelet surface under dynamic shear stress is proposed. Cumulative effect of dynamic shear on platelet activation via conformational changes of VWF is analysed. The critical condition of shear-induced platelet activation is formulated. The explicit expression for the threshold value of cumulative shear stress as a function of VWF multimer size is derived. The results open novel prospects for pharmacological regulation of shear-induced platelet activation through control of VWF multimers size distribution.
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Affiliation(s)
- Denis M. Pushin
- National Research Center for Hematology, Moscow, Russia
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | | | | | - Georgy Th. Guria
- National Research Center for Hematology, Moscow, Russia
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
- * E-mail:
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13
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Huisman B, Hoore M, Gompper G, Fedosov DA. Modeling the cleavage of von Willebrand factor by ADAMTS13 protease in shear flow. Med Eng Phys 2017; 48:14-22. [PMID: 28734872 DOI: 10.1016/j.medengphy.2017.06.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 06/04/2017] [Accepted: 06/27/2017] [Indexed: 11/27/2022]
Abstract
Von Willebrand factor (VWF) is a key protein in hemostasis as it mediates adhesion of blood platelets to a site of vascular injury. A proper distribution of VWF lengths is important for normal functioning of hemostatic processes, because a diminished number of long VWF chains may significantly limit blood clotting and lead to bleeding, while an abundant number of long VWFs may result in undesired thrombotic events. VWF size distribution is controlled by ADAMTS13 protease, which can cleave VWF chains beyond a critical shear rate when the chains are stretched enough such that cleavage sites become accessible. To better understand the cleavage process, we model VWF cleavage in shear flow using mesoscopic hydrodynamic simulations. Two cleavage models are proposed, a geometrical model based on the degree of local stretching of VWF, and a tension-force model based on instantaneous tension force within VWF bonds. Both models capture the susceptibility of VWF to cleavage at high shear rates; however, the geometrical model appears to be much more robust than the force model. Our simulations show that VWF susceptibility to cleavage in shear flow becomes a universal function of shear rate, independent of VWF length for long enough chains. Furthermore, VWF is cleaved with a higher probability close to its ends in comparison to cleaving in the middle, which results into longer circulation lifetimes of VWF multimers. Simulations of dynamic cleavage of VWF show an exponential distribution of chain lengths, consistently with available in vitro experiments. The proposed cleavage models can be used in realistic simulations of hemostatic processes in blood flow.
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Affiliation(s)
- Brooke Huisman
- Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, Jülich 52425, Germany
| | - Masoud Hoore
- Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, Jülich 52425, Germany
| | - Gerhard Gompper
- Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, Jülich 52425, Germany
| | - Dmitry A Fedosov
- Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, Jülich 52425, Germany.
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Wu WT, Jamiolkowski MA, Wagner WR, Aubry N, Massoudi M, Antaki JF. Multi-Constituent Simulation of Thrombus Deposition. Sci Rep 2017; 7:42720. [PMID: 28218279 PMCID: PMC5316946 DOI: 10.1038/srep42720] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 01/13/2017] [Indexed: 11/09/2022] Open
Abstract
In this paper, we present a spatio-temporal mathematical model for simulating the formation and growth of a thrombus. Blood is treated as a multi-constituent mixture comprised of a linear fluid phase and a thrombus (solid) phase. The transport and reactions of 10 chemical and biological species are incorporated using a system of coupled convection-reaction-diffusion (CRD) equations to represent three processes in thrombus formation: initiation, propagation and stabilization. Computational fluid dynamic (CFD) simulations using the libraries of OpenFOAM were performed for two illustrative benchmark problems: in vivo thrombus growth in an injured blood vessel and in vitro thrombus deposition in micro-channels (1.5 mm × 1.6 mm × 0.1 mm) with small crevices (125 μm × 75 μm and 125 μm × 137 μm). For both problems, the simulated thrombus deposition agreed very well with experimental observations, both spatially and temporally. Based on the success with these two benchmark problems, which have very different flow conditions and biological environments, we believe that the current model will provide useful insight into the genesis of thrombosis in blood-wetted devices, and provide a tool for the design of less thrombogenic devices.
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Affiliation(s)
- Wei-Tao Wu
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Megan A Jamiolkowski
- McGowan Institute for Regenerative Medicine, Pittsburgh, PA, USA.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - William R Wagner
- McGowan Institute for Regenerative Medicine, Pittsburgh, PA, USA.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.,Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA.,Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nadine Aubry
- Department of Mechanical Engineering, Northeastern University, Boston, MA, 02115, USA
| | - Mehrdad Massoudi
- U. S. Department of Energy, National Energy Technology Laboratory (NETL), PA, 15236, USA
| | - James F Antaki
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
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