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Klukowska A, Sidonio RF, Young G, Mancuso ME, Álvarez-Román MT, Bhatnagar N, Jansen M, Knaub S. Simoctocog alfa (Nuwiq ®) in children: early steps in life's journey for people with severe hemophilia A. Ther Adv Hematol 2024; 15:20406207241245511. [PMID: 38737006 PMCID: PMC11085023 DOI: 10.1177/20406207241245511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 03/20/2024] [Indexed: 05/14/2024] Open
Abstract
People with severe hemophilia A usually experience their first bleed early in life. In children with severe hemophilia A, primary prophylaxis is recommended to prevent recurrent and potentially life-threatening bleeds that significantly impact day-to-day life. Factor VIII (FVIII) prophylaxis is well-established in children and has been shown to reduce the development of hemophilic arthropathy. However, a major challenge of FVIII therapy is the development of neutralizing anti-FVIII antibodies (FVIII inhibitors). Simoctocog alfa (Nuwiq®) is a human cell line-derived recombinant FVIII (rFVIII) whose immunogenicity, efficacy, and safety have been studied in 167 children with severe hemophilia A across two prospective clinical trials and their long-term extensions. In 105 previously untreated children, the inhibitor rate of 16.2% for high-titer inhibitors (26.7% for all inhibitors) was lower than published rates for hamster cell line-derived rFVIII products. There was no inhibitor development in previously untreated children with non-null F8 mutations and in previously treated children. In a case series of 10 inhibitor patients, 8 (80%) underwent successful immune tolerance induction with simoctocog alfa with a median time to undetectable inhibitor of 3.5 months. In an analysis of 96 children who enrolled in the extension studies and received long-term simoctocog alfa prophylaxis for up to 5 years, median spontaneous, joint, and total annualized bleeding rates were 0.3, 0.4, and 1.8, respectively. No thromboembolisms were reported in any of the 167 children, and there were no treatment-related deaths. Optimal care of children should consider several factors, including minimization of inhibitor development risk, maintaining tolerance to FVIII, highly effective bleed prevention and treatment, safety, and impact on long-term outcomes such as bone and joint health. In this context we review the pediatric clinical data and ongoing studies with simoctocog alfa.
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Affiliation(s)
- Anna Klukowska
- Haemostasis Group of the Polish Society of Haematology and Transfusiology, 14 Indira Gandhi Street, Warsaw 02-776, Poland
| | - Robert F. Sidonio
- Hemophilia of Georgia Center for Bleeding and Clotting Disorders, Children’s Healthcare of Atlanta, Emory University, Atlanta, GA, USA
| | - Guy Young
- Hemostasis and Thrombosis Center, Cancer and Blood Disease Institute, Children’s Hospital Los Angeles, University of Southern California, Los Angeles, CA, USA
| | - Maria Elisa Mancuso
- Center for Thrombosis and Hemorrhagic Diseases, IRCCS Humanitas Research Hospital, Rozzano, Italy
- Humanitas University, Pieve Emanuele, Italy
| | | | - Neha Bhatnagar
- Oxford Haemophilia and Thrombosis Comprehensive Care Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Martina Jansen
- Clinical Research and Development, Octapharma Pharmazeutika Produktionsges m.b.H., Vienna, Austria
| | - Sigurd Knaub
- Clinical Research and Development, Octapharma AG, Lachen, Switzerland
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Alcedo Andrade PE, Mannucci PM, Kessler CM. Emicizumab: the hemophilia A game-changer. Haematologica 2024; 109:1334-1347. [PMID: 37916312 PMCID: PMC11063855 DOI: 10.3324/haematol.2022.282099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/26/2023] [Indexed: 11/03/2023] Open
Abstract
In hemophilia, the unmet needs regarding adherence to prophylaxis and lack of effective long-term prophylaxis regimens, especially in patients with inhibitors, led to the production of emicizumab, the first non-factor medicine for subcutaneous administration in patients with severe and moderate hemophilia A with or without factor VIII inhibitors. This review describes the research steps behind the development of this game-changing medication as well as its success in the prophylaxis of bleeding episodes, as witnessed by the results of pivotal clinical trials but also by real-life use in the frame of a still expanding global market. We also discuss potential and actual adverse events and the nuances related to clinical use, such as laboratory monitoring, development of neutralizing antidrug antibodies, risk of thrombosis/hypercoagulability and role in the management of surgical operations. The potential of emicizumab to prevent bleeding in other congenital and acquired coagulation disorders is also outlined.
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Affiliation(s)
- Pedro E Alcedo Andrade
- Georgetown University Medical Center, Lombardi Comprehensive Cancer Center, Washington, DC,
| | - Pier Mannuccio Mannucci
- Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi, Hemophilia and Thrombosis Center, Milan
| | - Craig M Kessler
- Georgetown University Medical Center, Lombardi Comprehensive Cancer Center, Washington, District of Columbia.
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Ali AE, Becker RC. The foundation for investigating factor XI as a target for inhibition in human cardiovascular disease. J Thromb Thrombolysis 2024:10.1007/s11239-024-02985-0. [PMID: 38662114 DOI: 10.1007/s11239-024-02985-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/13/2024] [Indexed: 04/26/2024]
Abstract
Anticoagulant therapy is a mainstay in the management of patients with cardiovascular disease and related conditions characterized by a heightened risk for thrombosis. Acute coronary syndrome, chronic coronary syndrome, ischemic stroke, and atrial fibrillation are the most common. In addition to their proclivity for thrombosis, each of these four conditions is also characterized by local and systemic inflammation, endothelial/endocardial injury and dysfunction, oxidative stress, impaired tissue-level reparative capabilities, and immune dysregulation that plays a critical role in linking molecular events, environmental triggers, and phenotypic expressions. Knowing that cardiovascular disease and thrombosis are complex and dynamic, can the scientific community identify a common pathway or specific point of interface susceptible to pharmacological inhibition or alteration that is likely to be safe and effective? The contact factors of coagulation may represent the proverbial "sweet spot" and are worthy of investigation. The following review provides a summary of the fundamental biochemistry of factor XI, its biological activity in thrombosis, inflammation, and angiogenesis, new targeting drugs, and a pragmatic approach to managing hemostatic requirements in clinical trials and possibly day-to-day patient care in the future.
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Affiliation(s)
- Ahmed E Ali
- Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA
| | - Richard C Becker
- Department of Internal Medicine, College of Medicine, University of Cincinnati, 231 Albert Sabin Way, Cincinnati, OH, 45267, USA.
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Hu J, Chandler M, Manuel CM, Caicedo J, Denne M, Ewenstein B, Mokdad AG, Xing S, Recht M. Risk of Intracranial Hemorrhage in Persons with Hemophilia A in the United States: Real-World Retrospective Cohort Study Using the ATHNdataset. J Blood Med 2024; 15:191-205. [PMID: 38699197 PMCID: PMC11063465 DOI: 10.2147/jbm.s443380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 03/27/2024] [Indexed: 05/05/2024] Open
Abstract
Introduction Intracranial hemorrhage (ICH), a serious complication in persons with hemophilia A (PWHA), causes high rates of mortality and morbidity. Identified ICH risk factors from patient data spanning 1998-2008 require reassessment in light of changes in the current treatment landscape. Aim and methods PWHA identified in the ATHNdataset were evaluated retrospectively to assess incidence of ICH and determine the association between ICH risk and key characteristics using time-to-event analyses (Cox proportional-hazards models, survival curves, and sensitivity analyses). Results Over a median follow-up time of 10.7 patient-years, 135 of 7837 PWHA over 2 years of age in the ATHNdataset (1.7%) experienced an ICH. Stratification by prophylaxis status and inhibitor status resulted in an incidence rate (IR) ratio (IRR) (IR+/IR-) of 0.63 (95% confidence interval [CI], 0.43-0.94; P=0.020) and 1.76 (95% CI, 0.97-3.20; P=0.059), respectively. Characteristics associated with greater risk of developing ICH include being aged 2-12 years; being covered by Medicaid; having had HIV, hepatitis C, or hypertension; and never having received factor VIII or prophylactic treatment. In multivariable analysis with interaction, the estimated hazard ratio for PWHA never receiving prophylaxis was 7.67 (95% CI, 2.24-26.30), which shrunk to 2.03 (95% CI, 1.30-9.12) in bootstrapping analysis and 3.09 in the highest-penalty ridge-regression analysis but was still significant. Inhibitor status was found not to be statistically associated with ICH in all analyses. Conclusion These results align with previous studies demonstrating that prophylaxis confers a protective effect against ICH. Previously, inhibitor positivity had been shown to increase risk for ICH; however, this study did not corroborate those findings.
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Affiliation(s)
- Jianzhong Hu
- American Thrombosis and Hemostasis Network, Rochester, NY, USA
| | - Martin Chandler
- American Thrombosis and Hemostasis Network, Rochester, NY, USA
| | | | - Jorge Caicedo
- Rare Diseases and Hematology, Takeda Pharmaceuticals, U.S.A., Inc, Lexington, MA, USA
| | - Michael Denne
- Rare Diseases and Hematology, Takeda Pharmaceuticals, U.S.A., Inc, Lexington, MA, USA
| | - Bruce Ewenstein
- Rare Diseases and Hematology, Takeda Pharmaceuticals, U.S.A., Inc, Lexington, MA, USA
| | - Ali G Mokdad
- Rare Diseases and Hematology, Takeda Pharmaceuticals, U.S.A., Inc, Lexington, MA, USA
| | - Shan Xing
- US Value and Evidence Generation, Takeda Pharmaceuticals, U.S.A., Inc, Lexington, MA, USA
| | - Michael Recht
- American Thrombosis and Hemostasis Network, Rochester, NY, USA
- Yale Center for Bleeding and Clotting Disorders, Yale University School of Medicine, New Haven, CT, USA
- National Bleeding Disorders Foundation, New York, NY, USA
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Moser MM, Schoergenhofer C, Jilma B. Progress in von Willebrand Disease Treatment: Evolution towards Newer Therapies. Semin Thromb Hemost 2024. [PMID: 38331000 DOI: 10.1055/s-0044-1779485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
von Willebrand disease (VWD) is a very heterogenous disease, resulting in different phenotypes and different degrees of bleeding severity. Established therapies (i.e., desmopressin, antifibrinolytic agents, hormone therapy for heavy menstrual bleeding, and von Willebrand factor [VWF] concentrates) may work in some subtypes, but not in all patients. In recent years, progress has been made in improving the diagnosis of VWD subtypes, allowing for more specific therapy. The impact of VWD on women's daily lives has also come to the fore in recent years, with hormone therapy, tranexamic acid, or recombinant VWF as treatment options. New treatment approaches, including the replacement of lacking factor VIII (FVIII) function, may work in those subgroups affected by severe FVIII deficiency. Reducing the clearance of VWF is an alternative treatment pathway; for example, rondaptivon pegol is a VWFA1 domain-binding aptamer which not only improves plasma VWF/FVIII levels, but also corrects platelet counts in thrombocytopenic type 2B VWD patients. These approaches are currently in clinical development, which will be the focus of this review. In addition, half-life extension methods are also important for the improvement of patients' quality of life. Targeting specific mutations may further lead to personalized treatments in the future. Finally, a few randomized controlled trials, although relatively small, have been published in recent years, aiming to achieve a higher level of evidence in future guidelines.
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Affiliation(s)
- Miriam M Moser
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | | | - Bernd Jilma
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
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Borhany M, Arshad A, Qureshi H, Nadeem R, Jamal A, Ahmed Khan R. Emicizumab Prophylaxis in Patients with Severe Hemophilia A: Insights from A Resource Limited Country. Clin Appl Thromb Hemost 2024; 30:10760296231224357. [PMID: 38166474 PMCID: PMC10768607 DOI: 10.1177/10760296231224357] [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: 11/13/2023] [Revised: 12/05/2023] [Accepted: 12/17/2023] [Indexed: 01/04/2024] Open
Abstract
METHODS In this prospective study, severe HA patients were recruited from January 2022 to June 2023. Inhibitor positive and inhibitor negative patients with annual bleeding rate (ABR) 8 or greater and past histories of bleeding like intra-cranial, intra-abdominal, and pseudo-tumors were included. Emicizumab loading dose was 3 mg/kg in the first 4 weeks, and the maintenance dose was started at week 5 at 6 mg/kg/month. Patients' detailed bleeding history and demographics were recorded. The five-level EuroQol five-dimensional questionnaire (EQ-5D-5L) was used to evaluate patients' HRQoL. Furthermore, Hemophilia Joint Health Score (HJHS) and Functional Independence score in Hemophilia (FISH) were applied for the assessment of joints at different time points. Results were analyzed by SPSS version 21. RESULTS A total of 36 HA male patients with the mean age of 19.7 ± 14.42 years were recruited in the study; among them, 19 patients were inhibitor positive, while 17 were negative. Patients clinically presented with bleeding symptoms which included: hemarthrosis 95%, GI bleeding 13.8%, and bruises and gums bleeding 13.8%. Significant reduction was observed in the bleeding episodes after the therapeutic intervention, and joints assessment and Euro-Quality-of-life Visual Analog Scale showed a significant improvement in health after treatment. Similarly, there was a remarkable reduction in bleeding episodes and improved quality of life among HA patients. The ABR decreased from 53.6% episodes per year prior to treatment to 2.4% during Emicizumab therapy. Prior to initiating Emicizumab therapy, participants exhibited an average FISH score of 16 and HJHS score of 10, indicating moderate limitations due to joint-related issues. After treatment, the mean FISH score improved to 9 and HJHS score to 4 reflecting a substantial enhancement in participants' ability to perform daily activities (P < 0.057). CONCLUSION Our results showed that HA patients on prophylactic treatment with Emicizumab were less restricted and had improved quality of life due to marked decrease in bleeding episodes which resulted in improved health and social lives. In addition, it was well tolerated, and no participant discontinued treatment because of adverse events.
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Affiliation(s)
- Munira Borhany
- Department of Hematology, Hemophilia Welfare Society, Karachi, Pakistan
| | - Aisha Arshad
- Department of Hematology, Hemophilia Welfare Society, Karachi, Pakistan
| | - Heeba Qureshi
- Department of Hematology, Hemophilia Welfare Society, Karachi, Pakistan
| | - Rukhshanda Nadeem
- Department of Hematology, Hemophilia Welfare Society, Karachi, Pakistan
| | - Arif Jamal
- Department of Hematology, Hemophilia Welfare Society, Karachi, Pakistan
| | - Raheel Ahmed Khan
- Department of Hematology, Hemophilia Welfare Society, Karachi, Pakistan
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Lund J, Jensen K, Burnier L, Ezban M. In vitro effects of combining Mim8 with factor VIII, FVIIa, and activated prothrombin complex concentrates in thrombin generation assays. J Thromb Haemost 2023; 21:1493-1502. [PMID: 37037699 DOI: 10.1016/j.jtha.2023.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 02/09/2023] [Accepted: 03/07/2023] [Indexed: 04/12/2023]
Abstract
BACKGROUND Mim8 is a novel antifactor IXa/antifactor X bispecific antibody in clinical development for prophylactic treatment of hemophilia A with and without inhibitors. Patients treated with Mim8 may need supplementary bleed treatment under certain conditions such as surgery or major trauma. OBJECTIVES This study aimed to better understand the response of Mim8 in thrombin generation assays (TGAs) alone or in combination with other hemostatic proteins. METHODS We used TGAs with different activators (tissue factor (TF) and activated factor XI) to better understand the similarities and differences between the mode of action of Mim8 and factor VIII (FVIII). Following this, we investigated the effects of mixing Mim8 with the main bleed treatment options for persons with hemophilia A with or without inhibitors: FVIII, activated factor VII (FVIIa), and activated prothrombin complex concentrates (aPCC). RESULTS The results indicated that for patients without inhibitors, Mim8 does not interfere with FVIII's mode of action. For patients with inhibitors, Mim8 mixed with aPCC results in a strong synergistic effect causing thrombin generation far exceeding the normal levels. Contrary to this, mixing Mim8 with FVIIa results in a more controlled additive effect, visible only when using TF as a trigger, which does not exceed the normal level of thrombin generation. CONCLUSION These findings support the use of approved clinical doses of FVIIa for bleed treatment of patients with FVIII inhibitors treated with Mim8. Additionally, the findings suggest that concomitant use of FVIII and Mim8 is safe for managing breakthrough bleeds.
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Ay C, Kovacevic KD, Kraemmer D, Schoergenhofer C, Gelbenegger G, Firbas C, Quehenberger P, Jilma-Stohlawetz P, Gilbert JC, Zhu S, Beliveau M, Koenig F, Iorio A, Jilma B, Derhaschnig U, Pabinger I. The von Willebrand factor-binding aptamer rondaptivon pegol as a treatment for severe and nonsevere hemophilia A. Blood 2023; 141:1147-1158. [PMID: 36108308 PMCID: PMC10651782 DOI: 10.1182/blood.2022016571] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 08/23/2022] [Accepted: 09/06/2022] [Indexed: 11/20/2022] Open
Abstract
Factor VIII (FVIII) circulates in a noncovalent complex with von Willebrand Factor (VWF), the latter determining FVIII half-life. The VWF-binding aptamer rondaptivon pegol (BT200) increases plasma levels of VWF/FVIII in healthy volunteers. This trial assessed its safety, pharmacokinetics, and pharmacodynamics in hemophilia A. Nineteen adult patients (ages 20-62 years, 4 women) with hemophilia A (8 mild, 2 moderate, and 9 severe) received subcutaneous injections of rondaptivon pegol. After an initial fixed dose of 3 mg on days 0 and 4, patients received weekly doses of 2 to 9 mg until day 28. Severe hemophilia A patients underwent sparse-sampling population pharmacokinetics individual profiling after the final dose of rondaptivon pegol. Adverse events, pharmacokinetics, and pharmacodynamics were assessed. FVIII activity and VWF levels were measured. All patients tolerated rondaptivon pegol well. The geometric mean half-life of rondaptivon pegol was 5.4 days and rondaptivon pegol significantly increased VWF levels. In severe hemophilia A, 6 doses of rondaptivon pegol increased the half-lives of 5 different FVIII products from a median of 10.4 hours to 31.1 hours (range, 20.8-56.0 hours). Median FVIII increased from 22% to 48% in mild hemophilia A and from 3% to 7.5% in moderate hemophilia A. Rondaptivon pegol is a first-in-class prohemostatic molecule that extended the half-life of substituted FVIII approximately 3-fold and increased endogenous FVIII levels approximately 2-fold in hemophilia patients. This trial was registered at www.clinicaltrials.gov as #NCT04677803.
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Affiliation(s)
- Cihan Ay
- Clinical Division of Hematology and Hemastaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | | | - Daniel Kraemmer
- Clinical Division of Hematology and Hemastaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | | | - Georg Gelbenegger
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Christa Firbas
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Peter Quehenberger
- Clinical Institute of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Petra Jilma-Stohlawetz
- Clinical Institute of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | | | - Shuhao Zhu
- Guardian Therapeutics, Lexington, Massachusetts
| | | | - Franz Koenig
- CEMSIS, Medical University of Vienna, Vienna, Austria
| | - Alfonso Iorio
- Department of Health Research Methods, Evidence, and Impact and Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Bernd Jilma
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Ulla Derhaschnig
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Ingrid Pabinger
- Clinical Division of Hematology and Hemastaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria
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Morgan G, Back E, Rosa D, O’Hara J, Finnegan A. Assessing the value of bypassing agent therapy used prophylactic versus on-demand, during immune tolerance induction for treatment of inhibitors: a retrospective chart review. Orphanet J Rare Dis 2023; 18:47. [PMID: 36882773 PMCID: PMC9990186 DOI: 10.1186/s13023-023-02654-0] [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: 09/02/2022] [Accepted: 02/27/2023] [Indexed: 03/09/2023] Open
Abstract
BACKGROUND Haemophilia A is a bleeding disorder caused by deficiency of coagulation factor VIII (FVIII) which leads to severe and repeated bleedings. There is a need to understand the optimal treatment pathway for FVIII inhibitors with the use of immune tolerance induction (ITI) and the role of haemostatic 'bypassing' agents (BPA) on-demand (OD) or prophylactically (Px). The aim of this study was to gain a better understanding of the real-world use of BPA therapy administered prophylactically or on-demand concomitant with ITI, for the treatment of an inhibitor to FVIII replacement therapy in patients with severe haemophilia A. METHODS Retrospective observational data were used to capture disease management information for patients who were aged 16 or under and had received ITI and BPA treatment for their most recent inhibitor from Jan-2015 to Jan-2019, for 47 patients in the UK and Germany. Descriptive comparisons of the clinical effectiveness and resource utilisation of Px and OD BPA therapy during ITI were conducted. RESULTS During ITI and BPA treatment, for an inhibitor, bleeding events averaged 1.5 and 1.2 for Px and OD treatment respectively. Compared to only BPA therapy we see 3.4 and 1.4 bleeding events for Px and OD respectively during an inhibitor. CONCLUSION Baseline disease characteristics differed between BPA therapy cohorts and this resulted in higher clinical effectiveness of ITI treatment alongside BPA Px than BPA OD during an inhibitor.
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Affiliation(s)
- George Morgan
- HCD Economics, The Innovation Centre, Keckwick Lane, Daresbury, WA4 4FS UK
| | - Emily Back
- HCD Economics, The Innovation Centre, Keckwick Lane, Daresbury, WA4 4FS UK
| | - Doug Rosa
- HCD Economics, The Innovation Centre, Keckwick Lane, Daresbury, WA4 4FS UK
| | - Jamie O’Hara
- HCD Economics, The Innovation Centre, Keckwick Lane, Daresbury, WA4 4FS UK
- grid.43710.310000 0001 0683 9016Faculty of Health and Social Care, University of Chester, Chester, UK
| | - Alan Finnegan
- grid.43710.310000 0001 0683 9016Faculty of Health and Social Care, University of Chester, Chester, UK
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Nardi MA. Hemophilia A: Emicizumab monitoring and impact on coagulation testing. Adv Clin Chem 2023; 113:273-315. [PMID: 36858648 DOI: 10.1016/bs.acc.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Hemophilia A is an X-linked recessive bleeding disorder characterized by absent or ineffective coagulation factor VIII, a condition that could result in a severe and potentially life-threatening bleed. Although the current standard of care involves prophylactic replacement therapy of factor VIII, the development of neutralizing anti-factor VIII alloantibody inhibitors often complicates such therapeutic treatment. Emicizumab (Hemlibra®), a novel recombinant therapeutic agent for patients with hemophilia A, is a humanized asymmetric bispecific IgG4 monoclonal antibody designed to mimic activated factor VIII by bridging factor IXa and factor X thus effecting hemostasis. Importantly, this drug eliminates the need for factor VIII and complications associated with inhibitor generation. Emicizumab has been approved for use in several countries including the United States and Japan for prophylaxis of bleeding episodes in hemophilia A with and without FVIII inhibitors. Therapy is also approved in the European Union for routine prophylaxis of bleeds in hemophilia A with inhibitors or severe hemophilia A without inhibitors. Unfortunately, emicizumab therapy presents unique challenges for routine and specialty coagulation tests currently used to monitor hemophilia A. In this review, hemophilia A is presented, the biochemistry of factor VIII is discussed, and the impact of the therapeutic agent emicizumab is highlighted.
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Affiliation(s)
- Michael A Nardi
- Department of Pediatrics, New York University Grossman School of Medicine, New York, NY, United States; Department of Pathology, New York University Grossman School of Medicine, New York, NY, United States.
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11
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Mihaila RG. From a bispecific monoclonal antibody to gene therapy: A new era in the treatment of hemophilia A. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2023; 167:1-8. [PMID: 36413008 DOI: 10.5507/bp.2022.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 11/02/2022] [Indexed: 11/23/2022] Open
Abstract
The treatment of hemophilia A has progressed amazingly in recent years. Emicizumab, a bispecific-humanized monoclonal antibody, is able to improve coagulation by bridging activated factor IX and factor X. Emicizumab is administered subcutaneously and much less often compared to factor VIII products. It has low immunogenicity, does not require dose adjustment, and can be administered regardless of the presence of factor VIII inhibitors. Thrombin generation assays but not factor VIII activity are indicated to guide and monitor the treatment. Emicizumab has enabled the conversion of patients with severe forms into patients with milder forms of hemophilia A. It has reduced the number of bleeding episodes compared to both on-demand and prophylactic substitution therapy and has an excellent safety profile. Gene therapy can elevate factor VIII plasma levels for many years after a single treatment course, could offer long-term protection from bleeding episodes, and minimize or eliminate the need for substitutive treatment with factor VIII concentrates. Gene therapy can provoke an immune response, manifested by an increase in common liver enzymes, that require immunotherapy. Long term monitoring is necessary to identify possible adverse effects. Future objectives are: the development of an ideal viral vector, the possibility of its re-administration, the use of gene therapy in hemophiliac children, and determining whether it can be successfully used to induce immune tolerance to factor VIII ceteri paribus. The future will determine the place of each type of treatment and group of patients for which it is indicated.
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Albattat S, Alabdultaif A, Albattat F, Albattat B. Cerebellar hematoma in severe hemophilia with inhibitor on emicizumab prophylaxis: a case report. J Med Case Rep 2023; 17:63. [PMID: 36814352 PMCID: PMC9948523 DOI: 10.1186/s13256-023-03783-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 01/19/2023] [Indexed: 02/24/2023] Open
Abstract
BACKGROUND Emicizumab is a novel prophylactic medication used to treat patients with hemophilia A. It is indicated to minimize the frequency of bleeding episodes and the severity of serious bleeding in patients with hemophilia A utilizing inhibitors. However, some cases of bleeding episodes have been reported, and more data are needed regarding their management and expected outcomes. CASE PRESENTATION We report a case of a 4-year-old Saudi Arabian boy with severe hemophilia A who presented with a post-traumatic cerebral hemorrhage. The patient, with high titer inhibitors, was on emicizumab prophylaxis therapy. On hospital admission, he received tranexamic acid (10 mg intravenously, every 6 hours), and recombinant activated factor VII 120 µg/kg every 2 hours for 2 days then every 4 hours for 4 days. On follow-up, the patient showed no signs of neurological deficit. There was no need for emergency neurosurgical intervention since the bleeding had been controlled throughout the first 2 days. There were no recorded thrombotic sequelae or neurological complications, with complete resolution within 10 days. CONCLUSIONS This case implies that low-dose recombinant activated factor VII might be used safely and effectively with patients with hemophilia A on emicizumab prophylaxis, to reduce the risk of cerebral hemorrhage or another episode of serious bleeding along with its long-term complications.
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Affiliation(s)
- Sami Albattat
- Pediatric Department, Maternity and Children's Hospital, Alhassa, Ministry of Health, Najran, Saudi Arabia.
| | - Abbas Alabdultaif
- grid.415696.90000 0004 0573 9824Pediatric Department, Maternity and Children’s Hospital, Alhassa, Ministry of Health, Najran, Saudi Arabia
| | - Fatimah Albattat
- grid.412140.20000 0004 1755 9687King Faisal University, Alhassa, Saudi Arabia
| | - Batla Albattat
- grid.412140.20000 0004 1755 9687King Faisal University, Alhassa, Saudi Arabia
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13
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Batt K, Schultz BG, Caicedo J, Hollenbeak CS, Agrawal N, Chatterjee S, Bullano M. A real-world study comparing pre-post billed annualized bleed rates and total cost of care among non-inhibitor patients with hemophilia A switching from FVIII prophylaxis to emicizumab. Curr Med Res Opin 2022; 38:1685-1693. [PMID: 35880468 DOI: 10.1080/03007995.2022.2105072] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE Factor VIII (FVIII) replacement and emicizumab have demonstrated efficacy for prevention of bleeds among patients with hemophilia A (PwHA) compared to on-demand (OD) use. Evidence investigating clinical outcomes and healthcare costs of non-inhibitor PwHA switching from prophylaxis with FVIII concentrates to emicizumab has not been well-established within large real-world datasets. This study aimed to investigate billed annualized bleed rates (ABRb) and total cost of care (TCC) among non-inhibitor PwHA switching from FVIII-prophylaxis to emicizumab-prophylaxis. METHODS This retrospective, observational study was conducted using IQVIA PharMetrics Plus, a US administrative claims database. The date of first claim for emicizumab was defined as the index date. OD patients and inhibitor patients were excluded. Bleeds were identified using a list of 535 diagnosis codes. Bayesian models were developed to estimate the probability ABRb worsens and TCC increases after switching to emicizumab. Wilcoxon rank-sum tests were used to test statistical significance of changes in ABRb and TCC after switch. RESULTS Among the 121 identified patients, the difference in mean ABRb between FVIII-prophylaxis (0.68 [SD = 1.28]) and emicizumab (0.55 [SD = 1.48]) was insignificant (p = .142). The mean annual TCC significantly increased for patients switching from FVIII-prophylaxis ($518,151 [SD = $289,934]) to emicizumab ($652,679 [SD = $340,126]; p < .0001). The Bayesian models estimated a 21.0% probability of the ABRb worsening and a 99.9% probability of increasing TCC after switch. CONCLUSIONS This study found that in male non-inhibitor PwHA, switching from FVIII prophylaxis to emicizumab incurs substantial cost increase with no significant benefit in ABRb. This evidence may help guide providers, payers, and patients in shared decision-making conversations around best treatment options.
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Affiliation(s)
- Katharine Batt
- Department of Hematology and Medical Oncology, Wake Forest Baptist School of Medicine, Winston-Salem, NC, USA
| | - Bob G Schultz
- Outcomes Research, Takeda Pharmaceuticals U.S.A., Inc., Lexington, MA, USA
| | - Jorge Caicedo
- Outcomes Research, Takeda Pharmaceuticals U.S.A., Inc., Lexington, MA, USA
| | - Christopher S Hollenbeak
- Department of Health Policy and Administration, The Pennsylvania State University, College of Health and Human Development, University Park, PA, USA
| | | | | | - Michael Bullano
- Outcomes Research, Takeda Pharmaceuticals U.S.A., Inc., Lexington, MA, USA
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14
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Ghosh K, Ghosh K. Monoclonal antibodies used for the management of haematological disorders. Expert Rev Hematol 2022; 15:443-455. [PMID: 35504000 DOI: 10.1080/17474086.2022.2073213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Monoclonal antibodies Ab (MoAb) are increasingly becoming part of therapeutic armamentarium for haematologists and haemato-oncologists. This review brings together commonly used antibodies in one place for brevity and novel understanding. AREAS COVERED Pubmed and Scopus databases were explored focusing on MoAb in clinical haematological practice. Emphasis was given to current review articles. The data base was searched from 1997 till present. 24 different antibodies, most of which are in use were discussed. Antibodies are used for diverse conditions i.e. malignant and benign haematological conditions, treatment at various phases of stem cell transplantation. These antibodies were used both alone or in combination with various chemotherapy, targeted small molecules or as immunoconjugates. Some of the side effect profiles of these antibodies were common and some were unique. Unusual infections or organ dysfunctions were noted. Improved function of antibodies by protein engineering is also advancing rapidly. Dosage, frequency and route of administration depended on the convenience and condition for which the antibody is used. EXPERT OPINION : MoAbs are increasingly used in haematology practice either alone or in combination with other types of therapy for improved out come in various haematological conditions.
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Affiliation(s)
- Kanjaksha Ghosh
- National Institute of Immunohaematology. 13th fl. KEM Hospital MS Building, Parel, Mumbai 400012. India
| | - Kinjalka Ghosh
- Department of Clinical Biochemistry , Tata Memorial Hospital. & Homi Bhaba National Institute. Parel, Mumbai 400012.India
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15
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O'Hara J, Neumann PJ. Health technology assessment for gene therapies in haemophilia. Haemophilia 2022; 28 Suppl 2:19-26. [DOI: 10.1111/hae.14413] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 07/15/2021] [Accepted: 08/31/2021] [Indexed: 12/20/2022]
Affiliation(s)
- Jamie O'Hara
- HCD Economics Daresbury UK
- University of Chester Chester UK
| | - Peter J. Neumann
- Center for the Evaluation of Value and Risk in Health Institute for Clinical Research and Health Policy Studies, Tufts Medical Centre Boston Massachusetts USA
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16
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Weber C, Rigby A, Lip GYH. Thrombosis and Haemostasis 2021 Editors' Choice Papers. Thromb Haemost 2022; 122:163-170. [PMID: 35038760 DOI: 10.1055/s-0041-1741072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Christian Weber
- Institute for Cardiovascular Prevention (IPEK), LMU Munich, Munich, Germany.,German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany.,Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Anne Rigby
- Institute for Cardiovascular Prevention (IPEK), LMU Munich, Munich, Germany
| | - Gregory Y H Lip
- Liverpool Centre for Cardiovascular Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom.,Aalborg Thrombosis Research Unit, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
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17
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Hassan E, Jonathan L, Jayashree M. Real-world experience on the tolerability and safety of emicizumab prophylaxis in paediatric patients with severe haemophilia A with and without FVIII inhibitors. Haemophilia 2021; 27:e698-e703. [PMID: 34628693 DOI: 10.1111/hae.14432] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 09/27/2021] [Accepted: 09/27/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND Emicizumab is a bispecific monoclonal antibody that bridges activated factor (F) IX and FX, and maintains haemostasis in patients with haemophilia A (PwHA). As a novel agent, many questions remain unanswered about the loss of emicizumab efficacy due to anti-drug antibody (ADA) development, the incidence of inhibitor recurrence in previously tolerized patients, and the risk of de novo inhibitor development. AIM To present real-world experience regarding tolerability, side effects, and outcomes of adverse events of emicizumab prophylaxis in paediatric PwHA. METHODS Data on tolerability, compliance, adverse events, and laboratory results of paediatric patients receiving emicizumab prophylaxis, treated at the Haemophilia Comprehensive Care Centre, at Birmingham Children's Hospital between March 2018 and June 2021, were collected. RESULTS Our results showed that out of 52 patients, four experienced minor adverse events, two developed headaches, one developed abdominal pain and nausea, and one developed injection site reactions. Moreover, four patients experienced major adverse events, including severe headaches, major bleeding events, development of ADAs, and recurrence of inhibitors. Emicizumab prophylaxis was discontinued in three patients (5.7% of the cohort) due to adverse events. In addition, emicizumab was discontinued in one patient because of poor compliance. No adverse events were reported in previously untreated/minimally treated patients, represented by four patients in our cohort. CONCLUSIONS The real-world experience of emicizumab prophylaxis in our cohort showed that emicizumab was safe and well tolerated in paediatric PwHA with and without inhibitors. Long-term assessment is crucial to monitor major adverse events, recurrence of inhibitors, and development of ADAs.
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Affiliation(s)
- Eman Hassan
- Department of Paediatrics, NHS Foundation Trust, Paediatric Haematology, Haematology and Oncology Unit, Birmingham Children's Hospital, Birmingham, UK
| | - Lancashire Jonathan
- Department of Paediatric Haematology, NHS Foundation Trust, Birmingham Children's Hospital, Birmingham, UK
| | - Motwani Jayashree
- Department of Paediatric Haematology, NHS Foundation Trust, Birmingham Children's Hospital, Birmingham, UK
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18
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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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19
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Hassan E, Motwani J. Management and outcomes of paediatric patients on emicizumab prophylaxis undergoing surgical procedures: Experience from a large haemophilia centre in the UK. Haemophilia 2021; 27:e620-e623. [PMID: 34118116 DOI: 10.1111/hae.14358] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/23/2021] [Accepted: 05/31/2021] [Indexed: 01/16/2023]
Affiliation(s)
- Eman Hassan
- Department of Paediatric Haematology, Birmingham Children's Hospital, Birmingham, UK.,Department of Pediatrics, Haematology and Oncology Unit, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Jayashree Motwani
- Department of Paediatric Haematology, Birmingham Children's Hospital, Birmingham, UK
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20
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Weber C, Rigby A, Lip GYH. Thrombosis and Haemostasis 2020 Editors' Choice Papers. Thromb Haemost 2021; 121:109-114. [PMID: 33477198 DOI: 10.1055/s-0040-1722171] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Christian Weber
- Institute for Cardiovascular Prevention (IPEK), LMU Munich, Munich, Germany.,Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Anne Rigby
- Institute for Cardiovascular Prevention (IPEK), LMU Munich, Munich, Germany
| | - Gregory Y H Lip
- Liverpool Centre for Cardiovascular Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom.,Aalborg Thrombosis Research Unit, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
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