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Moore GW, Castoldi E, Teruya J, Morishita E, Adcock DM. Factor V Leiden-independent activated protein C resistance: Communication from the plasma coagulation inhibitors subcommittee of the International Society on Thrombosis and Haemostasis Scientific and Standardisation Committee. JOURNAL OF THROMBOSIS AND HAEMOSTASIS : JTH 2023; 21:164-174. [PMID: 36695379 DOI: 10.1016/j.jtha.2022.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/30/2022] [Accepted: 10/06/2022] [Indexed: 01/09/2023]
Abstract
Activated protein C resistance (APC-R) due to the single-nucleotide polymorphism factor V Leiden (FVL) is the most common cause of hereditary thrombophilia. It is found predominantly in Caucasians and is uncommon or absent in other populations. Although FVL is responsible for >90% of cases of hereditary APC-R, a number of other F5 variants that also confer various degrees of APC-R and thrombotic risk have been described. Acquired APC-R due to increased levels of coagulation factors, reduced levels of inhibitors, or the presence of autoantibodies occurs in a variety of conditions and is an independent risk factor for thrombosis. It is common for thrombophilia screening protocols to restrict assessment for APC-R to demonstrating the presence or absence of FVL. The aim of this Scientific and Standardisation Committee communication is to detail the causes of FVL-independent APC-R to widen the diagnostic net, particularly in situations in which in vitro APC-R is encountered in the absence of FVL. Predilution clotting assays are not FVL specific and are used to detect clinically significant F5 variants conferring APC-R, whereas different forms of acquired APC-R are preferentially detected using the classical activated partial thromboplastin time-based APC-R assay without predilution and/or endogenous thrombin potential APC-R assays. Resource-specific recommendations are given to guide the detection of FVL-independent APC-R.
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Affiliation(s)
- Gary W Moore
- Department of Haematology, Specialist Haemostasis Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK; Faculty of Science and Technology, Middlesex University, London, UK.
| | - Elisabetta Castoldi
- Department of Biochemistry, CARIM, Maastricht University, Maastricht, the Netherlands
| | - Jun Teruya
- Department of Pathology & Immunology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA; Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA; Department of Medicine, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - Eriko Morishita
- Department of Hematology, Kanazawa University Hospital, Kanazawa, Japan
| | - Dorothy M Adcock
- Laboratory Corporation of America Holdings, Burlington, North Carolina, USA
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2
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Wada H, Ichinose A, Shiraki K, Shimpo H, Shimaoka M. Coagulation factor V inhibitors, a review of the case report literature. THROMBOSIS UPDATE 2021. [DOI: 10.1016/j.tru.2021.100058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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3
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Autoimmune Factor V Deficiency That Took 16 Years to Diagnose due to Pseudodeficiency of Multiple Coagulation Factors. Case Rep Med 2021; 2021:4657501. [PMID: 33505468 PMCID: PMC7815411 DOI: 10.1155/2021/4657501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 12/06/2020] [Accepted: 01/02/2021] [Indexed: 11/18/2022] Open
Abstract
A 70-year-old man presented to our hospital with intramuscular hemorrhage in the right thigh. He had exhibited a tendency to bleed for the last 16 years and had visited several medical institutions, but no diagnosis had been made. Since the risk of sudden bleeding was assumed to be high due to his age, we decided to examine him in our department. A coagulation abnormality with prothrombin time-international normalized ratio (PT-INR) of 4.5 and activated partial thromboplastin time (aPTT) of 99.6 seconds was observed, but the platelet count, fibrinogen, and PIVKAII were within normal limits. Coagulation activities of factor V, VII, VIII, IX, X, XI, XII, and XIII were all reduced. Anti-factor VIII and IX antibodies which were measured by the Bethesda method, lupus anti-coagulant (diluted Russell snake venom time method) and anti-cardiolipin antibody were also positive. The results of these tests were comparable to those undertaken 15 years ago when they were scrutinized at the university hospital. We suspected the presence of anti-factor V antibodies because there was a dissociation between the thrombotest values measured and those calculated from the PT-INR. Moreover, cross-mixing test showed an immediate inhibitor pattern. Subsequently, factor V antibodies were confirmed by the immunoblot method and the diagnosis of autoimmune factor V deficiency was made. When factor V, which is downstream of the coagulation cascade, is inhibited, coagulation test using the one-stage clotting method shows a pseudolow value. Therefore, extensive abnormalities of coagulation factor activity and inhibitor assay should be interpreted with caution, and the presence of a high titer of factor V inhibitor should be considered.
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Zhao WB, Chen YR, Luo D, Lin HC, Long B, Wu ZY, Peng H. Severe serous cavity bleeding caused by acquired factor V deficiency associated with lymphatic leakage in a hemodialysis patient: A case report. World J Clin Cases 2019; 7:2556-2561. [PMID: 31559292 PMCID: PMC6745312 DOI: 10.12998/wjcc.v7.i17.2556] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/30/2019] [Accepted: 08/20/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Acquired factor V deficiency is a rare secondary hemorrhagic disease, which can lead to a severe bleeding disorder.
CASE SUMMARY We report a 47-year-old hemodialysis patient who presented with severe hemorrhagic pleural effusion and hemorrhagic pericardial effusion associated with lymphatic leakage. The laboratory examination revealed decreased factor V activity (2% of population average value). With decreased lymphatic leakage, factor V activity increased (to 46%). Lymph drainage correlated with prothrombin time and active partial thrombin time. The cause of the disease favored an acquired disease. The common causes which trigger factor V inhibitors were excluded. An inhibitor was not detected. It is possible that there was a clotting factor inhibitor leaking with the lymph in the drainage. Inhibitor production may be due to immune dysfunction caused by persistent lymphatic drainage, or that coagulation inhibitors were produced, drained with the lymph, and partly cleared by hemodialysis.
CONCLUSION In this case, we have firstly reported factor V deficiency associated with lymphatic leakage in a hemodialysis patient.
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Affiliation(s)
- Wen-Bo Zhao
- Department of Nephrology,The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, Guangdong Province, China
| | - Yan-Ru Chen
- Department of Nephrology,The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, Guangdong Province, China
| | - Dan Luo
- Department of Nephrology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, Guangdong Province, China
| | - Hong-Chun Lin
- Department of Nephrology,The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, Guangdong Province, China
| | - Bing Long
- Department of Hematology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, Guangdong Province, China
| | - Zhen-Yu Wu
- Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510630, Guangdong Province, China
| | - Hui Peng
- Department of Nephrology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, Guangdong Province, China
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A high titer of acquired factor V inhibitor in a hemodialysis patient who developed arterial thrombosis. Int J Hematol 2018; 109:214-220. [PMID: 30446942 DOI: 10.1007/s12185-018-2561-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 11/12/2018] [Accepted: 11/13/2018] [Indexed: 10/27/2022]
Abstract
An 87-year-old man with diabetes mellitus was admitted to control recurrent bleeding from hemodialysis puncture sites. He was a smoker and had been diagnosed with arteriosclerosis obliterans. His PT and APTT were markedly prolonged, and all coagulation factors were markedly decreased (factor V [FV] activity < 1%) or below the measurement threshold, with the exception of fibrinogen and factor XIII. Neither PT nor APTT were corrected upon mixing with normal plasma. A high titer of FV inhibitor was found at 415 BU/mL, and anti-FV autoantibody was detected by both immunoblot assay and ELISA. Prednisolone administration and plasma exchange partially improved prolonged PT and APTT and decreased the FV inhibitor level. Five months later, he manifested symptoms of severe ischemia in both legs. Angiography revealed diffuse stenosis downstream of both common iliac arteries. Endovascular therapy was repeated four times, the prednisolone dose was reduced, and low-dose antiplatelet therapy was initiated. After the final successful endovascular therapy, arterial thrombosis was detected using ultrasound and angiography. Aspiration thrombectomy and thrombolytic therapy failed to achieve recanalization, and necrosis of the legs worsened. Despite the severe coagulation abnormalities, vascular interventions should have been performed with regular-dose antiplatelet therapy, as the patient exhibited multiple risk factors for atherothrombosis.
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Acquired factor V deficiency in a patient with a urinary tract infection presenting with haematuria followed by multiple haemorrhages with an extremely low level of factor V inhibitor: a case report and review of the literature. Blood Coagul Fibrinolysis 2018; 28:334-341. [PMID: 27428013 PMCID: PMC5432097 DOI: 10.1097/mbc.0000000000000581] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
: Acquired factor V deficiency (AFVD) is a rare haemostatic disorder that is primarily because of the development of factor V inhibitors. Approximately, 200 cases have been reported and the greatest portion of these cases was because of bovine thrombin exposure. We report a case of a man who presented with haematuria followed by multiple haemorrhages associated with an elevated prothrombin time and an activated partial thromboplastin time. A workup revealed reduced factor V activity and a factor V inhibitor level of 1.9 BU, which were likely secondary to a urinary tract infection. Using corticosteroids, we successfully eliminated the inhibitor and controlled the bleeding. We review the published literature to identify the conditions that are associated with nonbovine thrombin AFVD. We assume that AFVD should be kept in mind for patients who present with multiple haemorrhages.
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7
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Gavva C, Yates SG, Rambally S, Sarode R. Transfusion management of factor V deficiency: three case reports and review of the literature. Transfusion 2016; 56:1745-9. [PMID: 27125565 DOI: 10.1111/trf.13623] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 03/18/2016] [Accepted: 03/21/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND Factor V (FV) deficiency may be inherited as an autosomal recessive disease or acquired as a result of autoantibody formation, either spontaneously or secondary to exposure to bovine thrombin or medications. Congenital FV deficiency has traditionally been treated with plasma transfusions. However, recent evidence has suggested that platelet (PLT) transfusions may be a better alternative as FV stored within PLT alpha granules has greater procoagulant potential and is released locally at sites of vascular injury. We report three cases of FV deficiency, one congenital and two acquired, and emphasize the different management approaches. CASE REPORTS Patient 1 was a 30-year-old man with congenital FV deficiency who presented with a trauma-induced hematoma of his lower extremity. He was treated with 5 PLT units over 48 hours. Patient 2 was a 64-year-old woman who presented with an upper-extremity thrombus and was discovered to have a FV inhibitor, likely secondary to antibiotics. Patient 3 was a 75-year-old woman with hepatitis C virus (HCV) who presented with minor ecchymosis and was found to have a FV inhibitor secondary to either HCV or antibiotic exposure. Corticosteroids alone were able to eradicate the inhibitors in both patients with acquired inhibitors. CONCLUSIONS FV deficiency can present with a diverse range of symptoms. For bleeding patients, PLT transfusions should be the initial therapy. In patients with thrombosis, the risks and benefits of anticoagulation must be carefully assessed before treatment. For patients with minor bleeds, transfusions may be withheld, and elimination of the inhibitor should be the primary objective.
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Affiliation(s)
- Chakri Gavva
- Division of Transfusion Medicine and Hemostasis, Department of Pathology, UT Southwestern Medical Center, Dallas, Texas
| | - Sean G Yates
- Division of Transfusion Medicine and Hemostasis, Department of Pathology, UT Southwestern Medical Center, Dallas, Texas
| | - Siayareh Rambally
- Division of Hematology, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas
| | - Ravi Sarode
- Division of Transfusion Medicine and Hemostasis, Department of Pathology, UT Southwestern Medical Center, Dallas, Texas
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8
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Matsumoto T, Nogami K, Shima M. Coagulation function and mechanisms in various clinical phenotypes of patients with acquired factor V inhibitors. J Thromb Haemost 2014; 12:1503-12. [PMID: 25041532 DOI: 10.1111/jth.12660] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Indexed: 11/26/2022]
Abstract
BACKGROUND The clinical phenotype of individuals with acquired factor V (A-FV) inhibitors varies from asymptomatic (non-B group) to life-threatening bleeding (B group), but the mechanism(s) underlying this variation in hemorrhagic phenotype are poorly understood. OBJECTIVE To investigate coagulation mechanistically in a range of patients with A-FV antibodies. METHODS AND RESULTS Ten cases of A-FV inhibitors in the non-B (n = 5) and B groups (n = 5) were studied. Thrombin generation assays in these plasmas revealed little thrombin generation, despite similar FV activity levels in both groups. However, prothrombin time-based clot waveform analysis revealed that the clot times were significantly prolonged and the maximum velocity and acceleration of coagulation were lower in the B group than in the non-B group, suggesting that this technique might be useful for predicting and monitoring hemorrhagic symptoms. A-FV inhibitors from the non-B group recognized predominantly the FV heavy chain, whereas those from the B group recognized the light chain. Purified anti-FV autoantibodies (autoAbs) from the B group inhibited FV binding to phospholipid by 60-90%, whereas there was little effect on this reaction in the non-B group. In addition, anti-FV autoAbs from the non-B group impaired the activated protein C (APC) cofactor activity of FV in FVIIIa inactivation mechanisms, and delayed APC-catalyzed cleavage of FVa at Arg306, but not at Arg506, indicating the presence of APC resistance in the non-B group. CONCLUSIONS The results suggest that the different hemorrhagic phenotypes in A-FV inhibitors depend on the specific epitope of anti-FV autoAbs, and appear to be associated with an imbalance of procoagulant and anticoagulant function.
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Affiliation(s)
- T Matsumoto
- Department of Pediatrics, Nara Medical University, Kashihara, Japan
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9
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Aljohani NI, Matthews JH. Acquired factor V inhibitor in a patient with mantle cell lymphoma presenting with hematuria followed by thrombosis: a case report. Int Med Case Rep J 2014; 7:27-30. [PMID: 24591851 PMCID: PMC3938440 DOI: 10.2147/imcrj.s59236] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Acquired factor V inhibitor is a rare hemostatic disorder that presents with hemorrhagic manifestations in the vast majority of patients. Factor V inhibitor may develop through a variety of mechanisms involving development of alloantibodies or autoantibodies specific to Factor V. Autoantibodies, in particular, have been reported in a number of conditions. In this report, we describe a case of acquired factor V inhibitor in a patient with mantle cell lymphoma who presented with hematuria. Seven weeks after diagnosis and successful management, the patient developed deep vein thrombosis in the right lower extremity. The patient’s factor V levels were normalized, and the inhibitor was successfully eradicated using corticosteroids. Here, we discuss this rare disorder, its unusual manifestation, and provide a mini-review of the current literature regarding factor V inhibitors.
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Affiliation(s)
- Naif I Aljohani
- King Faisal specialist hospital and research centre, Saudi Arabia ; Division of Hematology, Department of Internal Medicine, Queen's University, Kingston, Ontario, Canada
| | - John H Matthews
- Division of Hematology, Department of Internal Medicine, Queen's University, Kingston, Ontario, Canada
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10
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W Collins P, Chalmers E, Hart D, Jennings I, Liesner R, Rangarajan S, Talks K, Williams M, R M Hay C. Diagnosis and management of acquired coagulation inhibitors: a guideline from UKHCDO. Br J Haematol 2013; 162:758-73. [PMID: 23889317 DOI: 10.1111/bjh.12463] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Peter W Collins
- School of Medicine, Cardiff University, University Hospital of Wales, Cardiff, UK
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11
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Higuchi T, Okamoto T, Kou T, Takeuchi T, Koyamada R, Okada S. Deep vein thrombosis associated with factor V inhibitor followed by immune thrombocytopenia. Ann Hematol 2012; 91:1831-2. [PMID: 22588327 DOI: 10.1007/s00277-012-1485-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Accepted: 04/27/2012] [Indexed: 10/28/2022]
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12
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Abstract
The occurrence of an inhibitor against coagulation factor V (FV) is a rare but challenging condition, which may span from asymptomatic laboratory abnormalities to potentially life-threatening bleeding. The onset of FV inhibitors has been associated most frequently in the past with the patients' exposure to topical bovine thrombin administered during surgery procedures. However, since this preparation is no longer used, in this systematic review we have only focused on non-bovine thrombin-related FV inhibitor cases.
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Affiliation(s)
- Massimo Franchini
- Servizio di Immunoematologia e Medicina Trasfusionale, Dipartimento di Patologia e Medicina di Laboratorio, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy.
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13
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Abstract
Proteolytic inactivation of factors Va (FVa) and VIIIa (FVIIIa) by activated protein C (APC) and its cofactors protein S and factor V (FV) is a key process in the physiological down-regulation of blood coagulation. Functional abnormalities of this pathway, which manifest themselves in vitro as a poor anticoagulant response of plasma to added APC (APC resistance), are prevalent in the general population and are associated with an increased risk of venous thrombosis. APC resistance was originally discovered in thrombophilic families and later shown to be associated with the common FV Arg506Gln (FV(Leiden)) mutation, which abolishes one of the APC-cleavage sites in FV. Although FV(Leiden) is the major cause of hereditary APC resistance, it is becoming increasingly clear that several other genetic and acquired conditions contribute to APC resistance and thereby increase the risk of venous thrombosis. This paper reviews the multifactorial etiology of APC resistance and discusses its clinical implications.
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Affiliation(s)
- E Castoldi
- Department of Biochemistry, Maastricht University, Maastricht, the Netherlands
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14
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Duckers C, Simioni P, Rosing J, Castoldi E. Advances in understanding the bleeding diathesis in factor V deficiency. Br J Haematol 2009; 146:17-26. [DOI: 10.1111/j.1365-2141.2009.07708.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Uibo R, Laidmäe I, Sawyer ES, Flanagan LA, Georges PC, Winer JP, Janmey PA. Soft materials to treat central nervous system injuries: evaluation of the suitability of non-mammalian fibrin gels. BIOCHIMICA ET BIOPHYSICA ACTA 2009; 1793:924-30. [PMID: 19344675 PMCID: PMC2895977 DOI: 10.1016/j.bbamcr.2009.01.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Revised: 01/06/2009] [Accepted: 01/07/2009] [Indexed: 12/24/2022]
Abstract
Polymeric scaffolds formed from synthetic or natural materials have many applications in tissue engineering and medicine, and multiple material properties need to be optimized for specific applications. Recent studies have emphasized the importance of the scaffolds' mechanical properties to support specific cellular responses in addition to considerations of biochemical interactions, material transport, immunogenicity, and other factors that determine biocompatibility. Fibrin gels formed from purified fibrinogen and thrombin, the final two reactants in the blood coagulation cascade, have long been shown to be effective in wound healing and supporting the growth of cells in vitro and in vivo. Fibrin, even without additional growth factors or other components has potential for use in neuronal wound healing in part because of its mechanical compliance that supports the growth of neurons without activation of glial proliferation. This review summarizes issues related to the use of fibrin gels in neuronal cell contexts, with an emphasis on issues of immunogenicity, and considers the potential advantages and disadvantages of fibrin prepared from non-mammalian sources.
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Affiliation(s)
- Raivo Uibo
- Immunology Group, IGMP University of Tartu, Ravila Street 19, Tartu 51014, Estonia
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16
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Lollar P. Pathogenic antibodies to coagulation factors. Part II. Fibrinogen, prothrombin, thrombin, factor V, factor XI, factor XII, factor XIII, the protein C system and von Willebrand factor. J Thromb Haemost 2005; 3:1385-91. [PMID: 15978096 DOI: 10.1111/j.1538-7836.2005.01228.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- P Lollar
- AFLAC Cancer Center and Blood Disorders Service, Emory University, Atlanta, GA 30322, USA.
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17
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Lu L, Liu Y, Wei J, Zhang L, Zhang L, Yang R. Acquired inhibitor of factor V: first report in China and literature review. Haemophilia 2005; 10:661-4. [PMID: 15357793 DOI: 10.1111/j.1365-2516.2004.01014.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We reported a 51-year-old man who developed a severe haematuria with a prolonged prothrombin time (PT) and activated partial thromboplastin time (aPTT). Laboratory evaluation revealed the presence of specific factor V inhibitors. No underlying diseases and associated conditions have been identified. The patient improved after immunosuppressive therapy. However, the FV level remained low, indicating incomplete inhibitor eradication. The clinical course of our patient was consistent with the observations by others that FV inhibitor can be persistent for months or years.
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Affiliation(s)
- L Lu
- Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
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18
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Abstract
PURPOSE OF REVIEW Activated protein C (APC) resistance, which is often associated with the factor V R506Q (FV Leiden) mutation, is a common risk factor for venous thrombosis. Study of the mechanism of APC resistance has revealed that coagulation FV stimulates the APC-catalysed inactivation of FVIIIa, and that this anticoagulant function of FV is impaired in FV Leiden. The present review covers the discovery, the physiological significance and the structural requirements of the APC-cofactor activity of FV. RECENT FINDINGS Recent in vitro and in vivo experiments indicate that the anticoagulant activity of FV is physiologically relevant and that FV plays a major role in the maintenance of the haemostatic balance. Quantitative and functional defects of the APC-cofactor activity of FV lead to increased thrombin generation and are associated with a prothrombotic state. Although the structural requirements for the expression of the APC-cofactor activity of FV are now beginning to be unravelled, the underlying molecular mechanism remains elusive. SUMMARY The APC-cofactor activity of FV and its impairment in FV Leiden can explain the different thrombosis risks associated with heterozygosity, homozygosity and pseudo-homozygosity for FV Leiden. Elucidation of the molecular mechanism of the anticoagulant function of factor V may provide novel targets for the design of antithrombotic drugs.
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Affiliation(s)
- Elisabetta Castoldi
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6200 MD Maastricht, The Netherlands
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Lian ECY, Tzakis AG, Andrews D. Response of factor V inhibitor to rituximab in a patient who received liver transplantation for primary biliary cirrhosis. Am J Hematol 2004; 77:363-5. [PMID: 15551286 DOI: 10.1002/ajh.20181] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A 43-year-old patient developed factor V inhibitor 6 months after liver transplantation for primary biliary cirrhosis in association with Sjogren's syndrome/systemic lupus erythematosus. She suffered from ecchymoses in the lower extremities. The factor V inhibitor was eradicated after 10 weekly doses of 375-500 mg/m2 rituximab.
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MESH Headings
- Adult
- Antibodies, Monoclonal/administration & dosage
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Murine-Derived
- Autoantibodies/blood
- Blood Coagulation/drug effects
- Blood Coagulation/immunology
- Factor V/antagonists & inhibitors
- Factor V/immunology
- Female
- Humans
- Liver Cirrhosis, Biliary/blood
- Liver Cirrhosis, Biliary/complications
- Liver Cirrhosis, Biliary/immunology
- Liver Cirrhosis, Biliary/surgery
- Liver Transplantation
- Lupus Erythematosus, Systemic/blood
- Lupus Erythematosus, Systemic/complications
- Lupus Erythematosus, Systemic/immunology
- Rituximab
- Sjogren's Syndrome/blood
- Sjogren's Syndrome/complications
- Sjogren's Syndrome/immunology
- Treatment Outcome
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Affiliation(s)
- Eric Chun-Yet Lian
- Department of Hematology/Oncology, University of Miami and Veterans Affairs Medical Center, Miami, Florida, USA.
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20
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Favaloro EJ, Posen J, Ramakrishna R, Soltani S, McRae S, Just S, Aboud M, Low J, Gemmell R, Kershaw G, Coleman R, Dean M. Factor V inhibitors. Blood Coagul Fibrinolysis 2004; 15:637-47. [PMID: 15613918 DOI: 10.1097/00001721-200412000-00003] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Acquired deficiencies of, or inhibitors to, factor V are considered rare events. We report a series of 14 acquired factor V deficiencies, 10 of which were confirmed to have inhibitors to factor V, as identified within Australia in the past 5 years following a multi-laboratory investigation. The initial index case seen by one laboratory was followed within 4 months by a separate similar case. This prompted local contact with colleagues (n = 20) working in other haemostasis referral laboratories to identify the current case series. In total, nearly one-half of all haemostasis referral laboratories contacted had seen a case within the past 5 years. Clinical features and the apparent associated risk of bleeding complications generally varied, as did laboratory findings and the likely causal event. There were three females and 11 males. Age ranged from 44 to 95 years (median, 81 years). The level of inhibitor ranged from undetectable to over 250 Bethesda units. The probable cause leading to development of the inhibitors ranged from exposure to bovine thrombin, exposure to antibiotics, surgery and malignancy. Of additional interest was the apparent association of anti-phospholipid antibodies in many of the cases. For example, in the two similar index cases, with factor V inhibitor titres > 200 Bethesda units, high levels of anti-cardiolipin antibodies (> 70 GPL units) were also detected. Although less clear because of inhibitor interference, many of the cases also showed evident co-associated lupus anticoagulant activity. In conclusion, we report a series of factor V inhibitors recently identified within our geographic region that would represent an annual incidence of around 0.29 cases per million Australians. Although considered a rare finding, there is a high likelihood that most haemostasis referral laboratories will see a case every five or so years.
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Affiliation(s)
- Emmanuel J Favaloro
- Department of Haematology, Institute of Clinical Pathology and Medical Research, Westmead Hospital, Western Sydney Area Health Service, Westmead, NSW, Australia.
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de Raucourt E, Barbier C, Sinda P, Dib M, Peltier JY, Ternisien C. High-dose intravenous immunoglobulin treatment in two patients with acquired factor V inhibitors. Am J Hematol 2003; 74:187-90. [PMID: 14587047 DOI: 10.1002/ajh.10420] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report two patients who developed acquired factor V (FV) inhibitors not related to exposure to bovine thrombin. Associated conditions were found in one patient (surgery, antibiotic administration) but none in the other one. Bleeding complications occurred only in the patient with idiopathic FV inhibitor, leading to packed red cell infusion. Laboratory findings showed the presence of specific FV inhibitors with titers of 5.5 and 5 Bethesda units, respectively. These two patients received high-dose intravenous immunoglobulin and FV levels normalized within a few days with a concomitant disappearance of FV inhibitors.
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Ajzner E, Balogh I, Haramura G, Boda Z, Kalmár K, Pfliegler G, Dahlbäck B, Muszbek L. Anti-factor V auto-antibody in the plasma and platelets of a patient with repeated gastrointestinal bleeding. J Thromb Haemost 2003; 1:943-9. [PMID: 12871359 DOI: 10.1046/j.1538-7836.2003.00143.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Development of autoantibody against coagulation factor V (FV) is a rare clinical condition with hemorrhagic complications of varying severity. The aim of this study was to establish the pathomechanism of an acquired FV deficiency and characterize the FV inhibitor responsible for the clinical symptoms. A 78-year-old female was admitted to hospital with severe gastrointestinal bleeding. General clotting tests and determination of clotting factors were performed by standard methods. FV antigen and FV containing immune complexes were measured by ELISA. The FV molecule was investigated by Western blotting and by sequencing the f5 gene. The binding of patient's IgG to FV and activated FV (FVa) was demonstrated in an ELISA system and its effect on the procoagulant activity of FVa was tested in clotting tests and in a chromogenic prothrombinase assay. Localization of the epitope for the antibody was performed by blocking ELISA. FV activity was severely suppressed both in plasma and platelets. FV antigen levels were normal by ELISA using polyclonal anti-FV antibody or monoclonal antibody against the connecting region of FV, but depressed when HV1 monoclonal antibody against the C2 domain in the FV light-chain was used as capture antibody. The FV molecule was found intact. An IgG reacting with both FV and FVa was present in the patient's plasma and its binding to FV was inhibited by HV1 antibody. FV-containing immune complexes were detected in the patient's plasma and platelet lysate. The patient's IgG inhibited the procoagulant function of FVa. An anti-FV IgG was present in the patient's plasma and platelets. The autoantibody reacted with an epitope in the C2 domain of FV light chain and neutralized the procoagulant function of FVa.
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Affiliation(s)
- E Ajzner
- Department of Clinical Biochemistry and Molecular Pathology, University of Debrecen, Medical and Health Science Center, Debrecen, Hungary
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