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Aleman M, Arepally GM, Baglin T, Buitrago L, Davizon-Castillo P, Dayal S, Flick MJ, Gerber G, Hisada Y, Kolev K, O’Loghlen A, Rezaie AR, Sparkenbaugh EM, Stavrou EX, Ünlü B, Vercellotti GM. Coagulation and platelet biology at the intersection of health and disease: illustrated capsules of the 11th Symposium on Hemostasis at the University of North Carolina. Res Pract Thromb Haemost 2024; 8:102395. [PMID: 38699410 PMCID: PMC11063502 DOI: 10.1016/j.rpth.2024.102395] [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: 01/22/2024] [Revised: 02/05/2024] [Accepted: 02/13/2024] [Indexed: 05/05/2024] Open
Abstract
The University of North Carolina Symposia on Hemostasis began in 2002, with The First Symposium on Hemostasis with a Special Focus on FVIIa and Tissue Factor. They have occurred biannually since and have maintained the primary goal of establishing a forum for the sharing of outstanding advances made in the basic sciences of hemostasis. The 2024 11th Symposium on Hemostasis will bring together leading scientists from around the globe to present and discuss the latest research related to coagulation factors and platelet biology. In keeping with the tradition of the conference, we expect novel cross-disciplinary collaborations to result from bringing together fundamental scientists and physician-scientists from different backgrounds and perspectives. The aim of these collaborations is to springboard the next generation of important advances in the field. This year's program was designed to discuss Coagulation and Platelet Biology at the Intersection of Health and Disease. The goal is to develop a better understanding of the pathophysiologic mechanisms leading to hemostatic and thrombotic disorders as this understanding is critical for the continued development of safe and efficacious therapeutics. Included in this review article are illustrated capsules provided by our speakers that highlight the main conclusions of the invited talks.
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Affiliation(s)
- Maria Aleman
- Blood Research Center, Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Gowthami M. Arepally
- Division of Hematology, Duke University Medical Center, Durham, North Carolina, USA
| | - Trevor Baglin
- Centessa Pharmaceuticals plc, Cheshire, United Kingdom
| | - Lorena Buitrago
- Allen and Frances Adler Laboratory of Blood and Vascular Biology, Rockefeller University, New York, New York, USA
| | - Pavel Davizon-Castillo
- Department of Pediatrics Hematology/Oncology and Bone Marrow Transplantation, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Sanjana Dayal
- Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | - Matthew J. Flick
- Blood Research Center, Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Gloria Gerber
- Division of Hematology, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Yohei Hisada
- Blood Research Center, Division of Hematology, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Krasimir Kolev
- Department of Biochemistry, Institute of Biochemistry and Molecular Biology, Semmelweis University, Budapest, Hungary
| | - Ana O’Loghlen
- Epigenetics & Cellular Senescence Group, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Alireza R. Rezaie
- Department of Biochemistry and Molecular Biology, Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Erica M. Sparkenbaugh
- Blood Research Center, Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Blood Research Center, Division of Hematology, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Evi X. Stavrou
- Department of Medicine, Hematology and Oncology Division, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
- Medicine Service, Section of Hematology-Oncology, Louise Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio, USA
| | - Betül Ünlü
- Einthoven Laboratory for Experimental Vascular Medicine, Department of Internal Medicine, Leiden University Medical Center, Leiden, The Netherlands
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Arfman T, Zollet V, van Es N, Bosch FTM, Nicolaes GAF, Sorvillo N, Voorberg J. Elevated levels of citrullinated fibrinogen in patients with cancer. EJHAEM 2024; 5:136-140. [PMID: 38406510 PMCID: PMC10887244 DOI: 10.1002/jha2.825] [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: 08/14/2023] [Revised: 09/27/2023] [Accepted: 10/16/2023] [Indexed: 02/27/2024]
Abstract
Neutrophil released peptidyl arginine deiminase 4 (PAD4) converts arginine residues on plasma proteins into citrulline. Here, we developed an assay to quantify citrullinated fibrinogen. We employed a biotin-conjugated phenylglyoxal (biotin-phenylglyoxal (PG)) compound that selectively labels citrulline. Patient samples were derived from a multicenter prospective cohort study that aimed to identify cancer patients at high risk for venous thromboembolism (VTE). Our data show that cancer patients have higher (median 2-fold increased) citrullinated fibrinogen levels when compared to normal human plasma and a cohort of healthy donors. Our results show that citrullination of fibrinogen is a common posttranslational modification in patients with cancer.
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Affiliation(s)
- Tom Arfman
- Department of Molecular HematologySanquin Research and Landsteiner LaboratoryAmsterdamThe Netherlands
| | - Valentina Zollet
- Department for BioMedical Research (DBMR)University of BernBernSwitzerland
- Graduate School for Cellular and Biomedical Sciences (GCB)University of BernBernSwitzerland
| | - Nick van Es
- Department of Vascular MedicineAmsterdam UMC location University of AmsterdamAmsterdamThe Netherlands
- Amsterdam Cardiovascular SciencesPulmonary Hypertension and ThrombosisAmsterdamThe Netherlands
| | - Floris T. M. Bosch
- Department of Vascular MedicineAmsterdam UMC location University of AmsterdamAmsterdamThe Netherlands
| | - Gerry A. F. Nicolaes
- Department of BiochemistryCardiovascular Research Institute Maastricht (CARIM)Maastricht UniversityMaastrichtThe Netherlands
| | - Nicoletta Sorvillo
- Department for BioMedical Research (DBMR)University of BernBernSwitzerland
| | - Jan Voorberg
- Department of Molecular HematologySanquin Research and Landsteiner LaboratoryAmsterdamThe Netherlands
- Department of Experimental Vascular MedicineAcademic Medical Centre AmsterdamUniversity of AmsterdamAmsterdamThe Netherlands
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Green RM, Thompson PR. Current insights into the role of citrullination in thrombosis. Curr Opin Chem Biol 2023; 75:102313. [PMID: 37148643 PMCID: PMC10523988 DOI: 10.1016/j.cbpa.2023.102313] [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: 01/09/2023] [Revised: 03/22/2023] [Accepted: 04/01/2023] [Indexed: 05/08/2023]
Abstract
Protein citrullination is a post-translational modification of arginine that controls a diverse array of cellular processes, including gene regulation, protein stability, and neutrophil extracellular trap (NET) formation. Histone citrullination promotes chromatin decondensation and NET formation, a pro-inflammatory form of cell death that is aberrantly increased in numerous immune disorders. This review will provide insights into NETosis and how this novel form of cell death contributes to inflammatory diseases, with a particular emphasis on its role in thrombosis. We will also discuss recent efforts to develop PAD-specific inhibitors.
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Affiliation(s)
- R Madison Green
- Program in Chemical Biology, University of Massachusetts Chan Medical School, 364 Plantation Street, Worcester, MA 01605, USA; Department of Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, 364 Plantation Street, Worcester, MA 01605, USA
| | - Paul R Thompson
- Program in Chemical Biology, University of Massachusetts Chan Medical School, 364 Plantation Street, Worcester, MA 01605, USA; Department of Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, 364 Plantation Street, Worcester, MA 01605, USA.
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Histone Citrullination Mediates a Protective Role in Endothelium and Modulates Inflammation. Cells 2022; 11:cells11244070. [PMID: 36552833 PMCID: PMC9777278 DOI: 10.3390/cells11244070] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/10/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
NETosis is a key host immune process against a pathogenic infection during innate immune activation, consisting of a neutrophil "explosion" and, consequently, NET formation, containing mainly DNA, histones, and other nuclear proteins. During sepsis, an exacerbated immune host response to an infection occurs, activating the innate immunity and NETosis events, which requires histone H3 citrullination. Our group compared the circulating histone levels with those citrullinated H3 levels in plasma samples of septic patients. In addition, we demonstrated that citrullinated histones were less cytotoxic for endothelial cells than histones without this post-translational modification. Citrullinated histones did not affect cell viability and did not activate oxidative stress. Nevertheless, citrullinated histones induced an inflammatory response, as well as regulatory endothelial mechanisms. Furthermore, septic patients showed elevated levels of circulating citrullinated histone H3, indicating that the histone citrullination is produced during the first stages of sepsis, probably due to the NETosis process.
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Varjú I, Tóth E, Farkas ÁZ, Farkas VJ, Komorowicz E, Feller T, Kiss B, Kellermayer MZ, Szabó L, Wacha A, Bóta A, Longstaff C, Kolev K. Citrullinated fibrinogen forms densely packed clots with decreased permeability. J Thromb Haemost 2022; 20:2862-2872. [PMID: 36083779 PMCID: PMC9828116 DOI: 10.1111/jth.15875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 08/17/2022] [Accepted: 09/07/2022] [Indexed: 01/13/2023]
Abstract
BACKGROUND Fibrin, the main scaffold of thrombi, is susceptible to citrullination by PAD (peptidyl arginine deiminase) 4, secreted from neutrophils during the formation of neutrophil extracellular traps. Citrullinated fibrinogen (citFg) has been detected in human plasma as well as in murine venous thrombi, and it decreases the lysability and mechanical resistance of fibrin clots. OBJECTIVE To investigate the effect of fibrinogen citrullination on the structure of fibrin clots. METHODS Fibrinogen was citrullinated with PAD4 and clotted with thrombin. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to measure fiber thickness, fiber height/width ratio, and fiber persistence length in clots containing citFg. Fiber density was measured with laser scanning microscopy (LSM) and permeability measurements were carried out to estimate the porosity of the clots. The intra-fiber structure of fibrin was analyzed with small-angle X-ray scattering (SAXS). RESULTS SEM images revealed a decrease in the median fiber diameter that correlated with the fraction of citFg in the clot, while the fiber width/length ratio remained unchanged according to AFM. With SAXS we observed that citrullination resulted in the formation of denser clots in line with increased fiber density shown by LSM. The permeability constant of citrullinated fibrin decreased more than 3-fold indicating significantly decreased porosity. SAXS also showed largely preserved periodicity in the longitudinal assembly of fibrin monomers. CONCLUSION The current observations of thin fibers combined with dense packing and low porosity in the presence of citFg can provide a structural framework for the mechanical fragility and lytic resistance of citrullinated fibrin.
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Affiliation(s)
- Imre Varjú
- Program in Cellular and Molecular MedicineBoston Children's HospitalBostonMassachusettsUSA
- Department of PediatricsHarvard Medical SchoolBostonMassachusettsUSA
- Department of Biochemistry, Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
- Department of Sociomedical Sciences, Mailman School of Public HealthColumbia UniversityNew YorkNew YorkUSA
| | - Erzsébet Tóth
- Department of Biochemistry, Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
| | - Ádám Z. Farkas
- Department of Biochemistry, Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
| | - Veronika J. Farkas
- Department of Biochemistry, Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
| | - Erzsébet Komorowicz
- Department of Biochemistry, Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
| | - Tímea Feller
- Department of Biophysics and Radiation BiologySemmelweis UniversityBudapestHungary
| | - Balázs Kiss
- Department of Biophysics and Radiation BiologySemmelweis UniversityBudapestHungary
| | | | - László Szabó
- Department of Biochemistry, Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
- Department of Functional and Structural Materials, Institute of Materials and Environmental Chemistry, Research Centre for Natural SciencesHungarian Academy of SciencesBudapestHungary
| | - András Wacha
- Biological Nanochemistry Research Group, Institute of Materials and Environmental Chemistry, Centre for Natural SciencesHungarian Academy of SciencesBudapestHungary
| | - Attila Bóta
- Biological Nanochemistry Research Group, Institute of Materials and Environmental Chemistry, Centre for Natural SciencesHungarian Academy of SciencesBudapestHungary
| | - Colin Longstaff
- National Institute for Biological Standards and ControlSouth MimmsUK
| | - Krasimir Kolev
- Department of Biochemistry, Institute of Biochemistry and Molecular BiologySemmelweis UniversityBudapestHungary
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Abstract
The activating interplay of thrombosis and inflammation (thromboinflammation) has been established as a major underlying pathway, driving not only cardiovascular disease but also autoimmune disease and most recently, COVID-19. Throughout the years, innate immune cells have emerged as important modulators of this process. As the most abundant white blood cell in humans, neutrophils are well-positioned to propel thromboinflammation. This includes their ability to trigger an organized cell death pathway with the release of decondensed chromatin structures called neutrophil extracellular traps. Decorated with histones and cytoplasmic and granular proteins, neutrophil extracellular traps exert cytotoxic, immunogenic, and prothrombotic effects accelerating disease progression. Distinct steps leading to extracellular DNA release (NETosis) require the activities of PAD4 (protein arginine deiminase 4) catalyzing citrullination of histones and are supported by neutrophil inflammasome. By linking the immunologic function of neutrophils with the procoagulant and proinflammatory activities of monocytes and platelets, PAD4 activity holds important implications for understanding the processes that fuel thromboinflammation. We will also discuss mechanisms whereby vascular occlusion in thromboinflammation depends on the interaction of neutrophil extracellular traps with ultra-large VWF (von Willebrand Factor) and speculate on the importance of PAD4 in neutrophil inflammasome assembly and neutrophil extracellular traps in thromboinflammatory diseases including atherosclerosis and COVID-19.
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Affiliation(s)
- Denisa D Wagner
- Program in Cellular and Molecular Medicine, Division of Hematology and Oncology, Boston Children's Hospital/Harvard Medical School, MA (D.D.W., L.A.H.)
| | - Lukas A Heger
- Program in Cellular and Molecular Medicine, Division of Hematology and Oncology, Boston Children's Hospital/Harvard Medical School, MA (D.D.W., L.A.H.)
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Mao L, Mostafa R, Ibili E, Fert-Bober J. Role of protein deimination in cardiovascular diseases: potential new avenues for diagnostic and prognostic biomarkers. Expert Rev Proteomics 2021; 18:1059-1071. [PMID: 34929115 DOI: 10.1080/14789450.2021.2018303] [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] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Arginine deimination (citrullination) is a post-translational modification catalyzed by a family of peptidyl arginine deiminase (PAD) enzymes. Cell-based functional studies and animal models have manifested the key role of PADs in various cardiovascular diseases (CVDs). AREA COVERED This review summarizes the latest developments in the role of PADs in CVD pathogenesis. It focuses on the PAD functions and diverse citrullinated proteins in cardiovascular conditions like deep vein thrombosis, ischemia/reperfusion, and atherosclerosis. Identification of PAD isoforms and citrullinated targets are essential for directing diagnosis and clinical intervention. Finally, anti-citrullinated protein antibodies (ACPAs) are addressed as an independent risk factor for cardiovascular events. A search of PubMed biomedical literature from the past ten years was performed with a combination of the following keywords: PAD/PADI, deimination/citrullination, autoimmune, fibrosis, NET, neutrophil, macrophage, inflammation, inflammasome, cardiovascular, heart disease, myocardial infarction, ischemia, atherosclerosis, thrombosis, and aging. Additional papers from retrieved articles were also considered. EXPERT OPINION PADs are unique family of enzymes that converts peptidyl-arginine to -citrulline in protein permanently. Overexpression or increased activity of PAD has been observed in various CVDs with acute and chronic inflammation as the background. Importantly, far beyond being simply involved in forming neutrophil extracellular traps (NETs), accumulating evidence indicated PAD activation as a trigger for numerous processes, such as transcriptional regulation, endothelial dysfunction, and thrombus formation. In summary, the findings so far have testified the important role of deimination in cardiovascular biology, while more basic and translational studies are essential to further exploration.
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Affiliation(s)
- Liqun Mao
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.,Advanced Clinical Biosystems Institute, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Rowann Mostafa
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.,Advanced Clinical Biosystems Institute, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Esra Ibili
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.,Advanced Clinical Biosystems Institute, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Justyna Fert-Bober
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.,Advanced Clinical Biosystems Institute, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
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