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Jackson CM, Esnouf P, Duewer DL. Thrombin: An Approach to Developing a Higher-Order Reference Material and Reference Measurement Procedure for Substance Identity, Amount, and Biological Activities. JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY 2020; 125:125021. [PMID: 39035347 PMCID: PMC10871826 DOI: 10.6028/jres.125.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 06/30/2020] [Indexed: 07/23/2024]
Abstract
Thrombin, the proteolytic enzyme that catalyzes the transformation of soluble fibrinogen to the polymerized fibrin clot, participates in multiple reactions in blood coagulation in addition to the clotting reaction. Although reference materials have existed for many years, structural characterization and measurement of biological activity have never been sufficient to permit claims of clear metrological traceability for the thrombin preparations. Our current state-of-the-art methods for protein characterization and determination of the catalytic properties of thrombin now make it practical to develop and characterize a metrologically acceptable reference material and reference measurement procedure for thrombin. Specifically, α-thrombin, the biologically produced protease formed during prothrombin activation, is readily available and has been extensively characterized. Dependences of thrombin proteolytic and peptide hydrolytic activities on a variety of substrates, pH, specific ions, and temperature are established, although variability remains for the kinetic parameters that describe thrombin enzymatic action. The roles of specific areas on the surface of the thrombin molecule (exosites) in substrate recognition and catalytic efficiency are described and characterized. It is opportune to develop reference materials of high metrological order and technical feasibility. In this article, we review the properties of α-thrombin important for its preparation and suggest an approach suitable for producing a reference material and a reference measurement procedure that is sensitive to thrombin’s catalytic competency on a variety of substrates.
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Affiliation(s)
| | | | - David L. Duewer
- National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
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Mohamed HT, El-Husseiny N, El-Ghonaimy EA, Ibrahim SA, Bazzi ZA, Cavallo-Medved D, Boffa MB, El-Shinawi M, Mohamed MM. IL-10 correlates with the expression of carboxypeptidase B2 and lymphovascular invasion in inflammatory breast cancer: The potential role of tumor infiltrated macrophages. Curr Probl Cancer 2018; 42:215-230. [PMID: 29459177 DOI: 10.1016/j.currproblcancer.2018.01.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 11/26/2017] [Accepted: 01/08/2018] [Indexed: 12/20/2022]
Abstract
Pro-carboxypeptidase B2 (pro-CPB2) or thrombin-activatable fibrinolysis inhibitor (TAFI) is a glycoprotein encoded by the CPB2 gene and deregulated in several cancer types, including breast cancer. Thrombin binding to thrombomodulin (TM), encoded by THBD, is important for TAFI activation. CPB2 gene expression is influenced by genetic polymorphism and cytokines such as interleukin 10 (IL-10). Our previous results showed that tumor infiltrating monocytes/macrophages (CD14+/CD16+) isolated from inflammatory breast cancer (IBC) patients' secrete high levels of IL-10. The aim of the present study is to test genetic polymorphism and expression of CPB2 in healthy breast tissues and carcinoma tissues of non-IBC and IBC patients. Furthermore, to investigate whether IL-10 modulates the expression of CPB2 and THBD in vivo and in-vitro. We tested CPB2 Thr325Ile polymorphism using restriction fragment length polymorphism, (RFLP) technique in healthy and carcinoma breast tissues. The mRNA expression of CPB2, THBD and IL10 were assessed by RT-qPCR. Infiltration of CD14+ cells was assessed by immunohistochemistry. In addition, we investigated the correlation between infiltration of CD14+ cells and expression of IL10 and CPB2. Furthermore, we correlated IL10 expression with the expression of both CPB2 and THBD in breast carcinoma tissues. Finally, we validated the role of recombinant IL-10 in regulating the expression of CPB2 and THBD using different breast cancer cell lines. Our results showed that CPB2 genotypes carrying the high-risk allele [Thr/Ile (CT) and Ile/Ile (TT)] were more frequent in both IBC and non-IBC patients compared to control group. CPB2 genotypes did not show any statistical correlation with CPB2 mRNA expression levels or patients' clinical pathological properties. Interestingly, CPB2 and IL10 expression were significantly higher and positively correlated with the incidence of CD14+ cells in carcinoma tissues of IBC as compared to non-IBC. On the other hand, THBD expression was significantly lower in IBC carcinoma versus non-IBC tissues. Based on molecular subtypes, CPB2 and IL10 expression were significantly higher in triple negative (TN) as compared to hormonal positive (HP) carcinoma tissues of IBC. Moreover, CPB2 expression was positively correlated with presence of lymphovascular invasion and the expression of IL10 in carcinoma tissues of IBC patients. Furthermore, recombinant human IL-10 stimulated CPB2 expression in SUM-149 (IBC cell line) but not in MDA-MB-231 (non-IBC cell line), while there was no significant effect THBD expression. In conclusion, carcinoma tissues of IBC patients are characterized by higher expression of CPB2 and lower expression of THBD. Moreover, CPB2 positively correlates with IL10 mRNA expression, incidence of CD14+ cells and lymphovascular invasion in IBC patients. IL-10 stimulated CPB2 expression in TN-IBC cell line suggests a relevant role of CPB2 in the aggressive phenotype of IBC.
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Affiliation(s)
| | - Noura El-Husseiny
- Department of Zoology, Faculty of Science, Cairo University, Giza, Egypt
| | | | | | - Zainab A Bazzi
- Department of Biochemistry, University of Western Ontario, London, Ontario, Canada
| | - Dora Cavallo-Medved
- Department of Biological Sciences, University of Windsor, Windsor, Ontario, Canada
| | - Michael B Boffa
- Department of Biochemistry, University of Western Ontario, London, Ontario, Canada
| | - Mohamed El-Shinawi
- Department of General Surgery, Faculty of Medicine, Ain Shams University, Cairo, Egypt; Breast-Gynecological International Cancer Society, Cairo, Egypt
| | - Mona Mostafa Mohamed
- Department of Zoology, Faculty of Science, Cairo University, Giza, Egypt; Breast-Gynecological International Cancer Society, Cairo, Egypt.
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Zwingerman N, Medina-Rivera A, Kassam I, Wilson MD, Morange PE, Trégouët DA, Gagnon F. Sex-specific effect of CPB2 Ala147Thr but not Thr325Ile variants on the risk of venous thrombosis: A comprehensive meta-analysis. PLoS One 2017; 12:e0177768. [PMID: 28552956 PMCID: PMC5446132 DOI: 10.1371/journal.pone.0177768] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 05/03/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Thrombin activatable fibrinolysis inhibitor (TAFI), encoded by the Carboxypeptidase B2 gene (CPB2), is an inhibitor of fibrinolysis and plays a role in the pathogenesis of venous thrombosis. Experimental findings support a functional role of genetic variants in CPB2, while epidemiological studies have been unable to confirm associations with risk of venous thrombosis. Sex-specific effects could underlie the observed inconsistent associations between CPB2 genetic variants and venous thrombosis. METHODS A comprehensive literature search was conducted for associations between Ala147Thr and Thr325Ile variants with venous thrombosis. Authors were contacted to provide sex-specific genotype counts from their studies. Combined and sex-specific random effects meta-analyses were used to estimate a pooled effect estimate for primary and secondary genetic models. RESULTS A total of 17 studies met the inclusion criteria. A sex-specific meta-analysis applying a dominant model supported a protective effect of Ala147Thr on venous thrombosis in females (OR = 0.81, 95%CI: 0.68,0.97; p = 0.018), but not in males (OR = 1.06, 95%CI:0.96-1.16; p = 0.263). The Thr325Ile did not show a sex-specific effect but showed variation in allele frequencies by geographic region. A subgroup analysis of studies in European countries showed decreased risk, with a recessive model (OR = 0.83, 95%CI:0.71-0.97, p = 0.021) for venous thrombosis. CONCLUSIONS A comprehensive literature review, including unpublished data, provided greater statistical power for the analyses and decreased the likelihood of publication bias influencing the results. Sex-specific analyses explained apparent discrepancies across genetic studies of Ala147Thr and venous thrombosis. While, careful selection of genetic models based on population genetics, evolutionary and biological knowledge can increase power by decreasing the need to adjust for testing multiple models.
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Affiliation(s)
- Nora Zwingerman
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Alejandra Medina-Rivera
- Genetics and Genome Biology Program, SickKids Research Institute, Toronto, Canada
- Laboratorio Internacional de Investigación sobre el Genoma Humano, Universidad Nacional Autónoma de México, Juriquilla, Santiago de Querétaro, Querétaro, Mexico
| | - Irfahan Kassam
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Michael D. Wilson
- Genetics and Genome Biology Program, SickKids Research Institute, Toronto, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Pierre-Emmanuel Morange
- Institut National de la Santé et de la Recherche Médicale (INSERM), Unité Mixte de Recherche (UMR) en Santé 1062, Nutrition Obesity and Risk of Thrombosis, Marseille, France
- Faculté de Médecine, Aix Marseille Université, Marseille, France
| | - David-Alexandre Trégouët
- Institut National de la Santé et de la Recherche Médicale (INSERM), Unité Mixte de Recherche en Santé (UMR_S) 1166, Paris, France
- Institute for Cardiometabolism and Nutrition, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie (UPMC Univ Paris 06), UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
| | - France Gagnon
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
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Chhikara A, Sharma S, Chandra J, Nangia A. Thrombin Activable Fibrinolysis Inhibitor in Beta Thalassemia. Indian J Pediatr 2017; 84:25-30. [PMID: 27487812 DOI: 10.1007/s12098-016-2208-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 07/25/2016] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To study plasma levels of Thrombin activable fibrinolysis inhibitor (TAFI) in children with β-thalassemia major. METHODS Fifty β-thalassemia major patients, 1.4 to 17 y of age, with number of transfusions received varying from 21 to 162 were selected at random and complete blood count (CBC), coagulation parameters [Prothrombin time (PT), Activated partial thromboplastin time (aPTT), fibrinogen, D-dimer, protein C, protein S, antithrombin, Tissue plasminogen activator (t-PA), Plasminogen activator inhibitor (PAI-1)] and TAFI were performed. RESULTS PT and aPTT were prolonged in 18 % and 30 % of cases respectively. Reduced activity of Protein C (PC) was observed in 50 % of cases and Protein S (PS) was reduced in 54 % of cases. t-PA levels were significantly higher in cases. TAFI levels were 17.24 ± 4.05 ng/ml which were significantly higher than the control group (15.01 ± 3.28; p = 0.003) No significant correlation of TAFI was observed with Hb, platelet counts, liver enzymes, serum ferritin, PC, PS, D-dimer, t-PA or PAI-1. CONCLUSIONS There is an ongoing subclinical activation of coagulation cascade and fibrinolytic system in thalassemia major (TM) patients. Higher levels of TAFI in the present study with no significant correlation with other parameters were noted, thus pointing out to its independent role in contribution to hypercoagulable state in thalassemia. TAFI serves as a link between two limbs of hemostasis, with its higher levels promoting inhibition of fibrinolytic system and thus promoting a hypercoagulable state. Performing TAFI levels in thalassemic patients could help to detect the early coagulopathy in these patients and hence these patients can be closely monitored for any evidence of thrombosis.
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Affiliation(s)
- Aruna Chhikara
- Department of Pathology, Lady Hardinge Medical College, New Delhi, India.
| | - Sunita Sharma
- Department of Pathology, Lady Hardinge Medical College, New Delhi, India
| | - Jagdish Chandra
- Department of Pediatrics, Lady Hardinge Medical College, New Delhi, India
| | - Anita Nangia
- Department of Pathology, Lady Hardinge Medical College, New Delhi, India
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Bazzi ZA, Lanoue D, El-Youssef M, Romagnuolo R, Tubman J, Cavallo-Medved D, Porter LA, Boffa MB. Activated thrombin-activatable fibrinolysis inhibitor (TAFIa) attenuates breast cancer cell metastatic behaviors through inhibition of plasminogen activation and extracellular proteolysis. BMC Cancer 2016; 16:328. [PMID: 27221823 PMCID: PMC4879731 DOI: 10.1186/s12885-016-2359-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 05/11/2016] [Indexed: 11/23/2022] Open
Abstract
Background Thrombin activatable fibrinolysis inhibitor (TAFI) is a plasma zymogen, which can be converted to activated TAFI (TAFIa) through proteolytic cleavage by thrombin, plasmin, and most effectively thrombin in complex with the endothelial cofactor thrombomodulin (TM). TAFIa is a carboxypeptidase that cleaves carboxyl terminal lysine and arginine residues from protein and peptide substrates, including plasminogen-binding sites on cell surface receptors. Carboxyl terminal lysine residues play a pivotal role in enhancing cell surface plasminogen activation to plasmin. Plasmin has many critical functions including cleaving components of the extracellular matrix (ECM), which enhances invasion and migration of cancer cells. We therefore hypothesized that TAFIa could act to attenuate metastasis. Methods To assess the role of TAFIa in breast cancer metastasis, in vitro migration and invasion assays, live cell proteolysis and cell proliferation using MDA-MB-231 and SUM149 cells were carried out in the presence of a TAFIa inhibitor, recombinant TAFI variants, or soluble TM. Results Inhibition of TAFIa with potato tuber carboxypeptidase inhibitor increased cell invasion, migration and proteolysis of both cell lines, whereas addition of TM resulted in a decrease in all these parameters. A stable variant of TAFIa, TAFIa-CIIYQ, showed enhanced inhibitory effects on cell invasion, migration and proteolysis. Furthermore, pericellular plasminogen activation was significantly decreased on the surface of MDA-MB-231 and SUM149 cells following treatment with various concentrations of TAFIa. Conclusions Taken together, these results indicate a vital role for TAFIa in regulating pericellular plasminogen activation and ultimately ECM proteolysis in the breast cancer microenvironment. Enhancement of TAFI activation in this microenvironment may be a therapeutic strategy to inhibit invasion and prevent metastasis of breast cancer cells.
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Affiliation(s)
- Zainab A Bazzi
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, N9J 3P4, Canada
| | - Danielle Lanoue
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, N9J 3P4, Canada
| | - Mouhanned El-Youssef
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, N9J 3P4, Canada
| | - Rocco Romagnuolo
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, N9J 3P4, Canada
| | - Janice Tubman
- Department of Biological Sciences, University of Windsor, Windsor, ON, N9J 3P4, Canada
| | - Dora Cavallo-Medved
- Department of Biological Sciences, University of Windsor, Windsor, ON, N9J 3P4, Canada
| | - Lisa A Porter
- Department of Biological Sciences, University of Windsor, Windsor, ON, N9J 3P4, Canada
| | - Michael B Boffa
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, N9J 3P4, Canada.
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Plasma thrombin-activatable fibrinolysis inhibitor levels and its Thr325Ile polymorphism in breast cancer. Blood Coagul Fibrinolysis 2013; 24:698-703. [DOI: 10.1097/mbc.0b013e3283610381] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Willemse JL, Heylen E, Nesheim ME, Hendriks DF. Carboxypeptidase U (TAFIa): a new drug target for fibrinolytic therapy? J Thromb Haemost 2009; 7:1962-71. [PMID: 19719827 PMCID: PMC3170991 DOI: 10.1111/j.1538-7836.2009.03596.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Procarboxypeptidase U (TAFI) is a recently discovered plasma procarboxypeptidase that upon activation by thrombin or thrombin-thrombomodulin turns into a potent antifibrinolytic enzyme. Its prominent bridging function between coagulation and fibrinolysis raised the interest of many research groups and of the pharmaceutical industry. The development of carboxypeptidase U (CPU) inhibitors as profibrinolytic agents is an attractive concept and possibilities for rational drug design will become more readily available in the near future as a result of the recently published crystal structure. Numerous studies have been performed and many of them show beneficial effects of CPU inhibitors for the improvement of endogenous fibrinolysis in different animal sepsis and thrombosis models. CPU inhibitors combined with tissue-type plasminogen activator (t-PA) seem to increase the efficiency of pharmacological thrombolysis allowing lower dosing of t-PA and subsequently fewer bleeding complications. This review will focus on recently obtained in vivo data and the benefits/risks of targeting CPU for the treatment of thrombotic disorders.
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Affiliation(s)
- Johan L. Willemse
- Laboratory of Medical Biochemistry, University of Antwerp, Antwerp, Belgium
| | - Evelien Heylen
- Laboratory of Medical Biochemistry, University of Antwerp, Antwerp, Belgium
| | - Michael. E. Nesheim
- Departments of Biochemistry and Medicine, Queen’s University, Ontario, Canada
| | - Dirk F. Hendriks
- Laboratory of Medical Biochemistry, University of Antwerp, Antwerp, Belgium
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Abstract
Fibrinolysis is regulated by specific molecular interactions between its main components. Activation of plasminogen by tissue-type plasminogen activator (t-PA) is enhanced in the presence of fibrin or at the endothelial cell surface. Urokinase-type plasminogen activator (u-PA) binds to a specific cellular u-PA receptor (u-PAR), resulting in enhanced activation of cell-bound plasminogen. Inhibition of fibrinolysis occurs at the level of plasminogen activation or at the level of plasmin. Assembly of fibrinolytic components at the surface of fibrin results in fibrin degradation. Assembly at the surface of cells provides a mechanism for generation of localized cell-associated proteolytic activity. This review includes novel proteins such a thrombin-activatable fibrinolysis inhibitor (TAFI) and discusses new insights into molecular mechanisms obtained from the rapidly growing knowledge of crystal structures of proteins.
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Affiliation(s)
- D C Rijken
- Department of Hematology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands.
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