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Ellsworth P, Chen SL, Jones LA, Ma AD, Key NS. Acquired hemophilia A: a narrative review and management approach in the emicizumab era. J Thromb Haemost 2025; 23:824-835. [PMID: 39536818 DOI: 10.1016/j.jtha.2024.09.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 08/06/2024] [Accepted: 09/11/2024] [Indexed: 11/16/2024]
Abstract
Acquired hemophilia A (AHA) is a rare bleeding disorder caused by inhibitory autoantibodies to factor (F)VIII. The goals of treatment are 2-fold, namely immunosuppressive therapy to eradicate the inhibitor and hemostatic management to control bleeding. Emicizumab, a bispecific antibody that acts as a FVIIIa-mimetic, has seen growing use in AHA following its approval for congenital hemophilia A. This review provides an overview of the epidemiology, pathophysiology, diagnosis, and treatment of AHA. Registry, trial, and case series data are assimilated and summarized with an emphasis on a standardized approach that integrates the use of emicizumab. With recent registry data suggesting the need to focus on immunosuppression-related mortality in AHA, we provide treatment recommendations in an algorithmic format that have become the standard of care at our institution. These recommendations are intended to minimize hemostatic product usage and potential toxicity related to immunosuppressive therapy while reducing morbidity and rehospitalization rates for bleeding. The proposed treatment algorithm, which includes key interventions by phase of therapy, can be readily implemented at centers that have rapid access to plasma FVIII activity using a one-stage assay. A case is presented to illustrate the proposed diagnostic and management considerations.
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Affiliation(s)
- Patrick Ellsworth
- Department of Medicine, Division of Hematology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; University of North Carolina Blood Research Center, Chapel Hill, NC 27599, USA.
| | - Sheh-Li Chen
- Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Lee Ann Jones
- Department of Pharmacy, University of North Carolina Medical Center, Chapel Hill, NC 27599, USA
| | - Alice D Ma
- Department of Medicine, Division of Hematology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; University of North Carolina Blood Research Center, Chapel Hill, NC 27599, USA
| | - Nigel S Key
- Department of Medicine, Division of Hematology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; University of North Carolina Blood Research Center, Chapel Hill, NC 27599, USA
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Castelli R, Gidaro A, Manetti R, Castiglia P, Delitala AP, Mannucci PM, Pasca S. Acquired Hemophilia A after SARS-CoV-2 Immunization: A Narrative Review of a Rare Side Effect. Vaccines (Basel) 2024; 12:709. [PMID: 39066347 PMCID: PMC11281676 DOI: 10.3390/vaccines12070709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/18/2024] [Accepted: 06/21/2024] [Indexed: 07/28/2024] Open
Abstract
Acquired hemophilia A (AHA) is a rare bleeding disorder (1.4 per million inhabitants per year) caused by neutralizing antibodies against factor VIII. Although uncommon, these autoantibodies can cause a high rate of morbidity and mortality. Several conditions are linked with AHA; based on an EACH2 study, 3.8% of AHA could be connected to infection. In the last four years, most humans have contracted the SARS-CoV-2 infection or have been vaccinated against it. Whether or not COVID-19 immunization might induce AHA remains controversial. This review aims to evaluate the evidence about this possible association. Overall, 18 manuscripts (2 case series and 16 case reports) were included. The anti-SARS-CoV-2 vaccination, as also happens with other vaccines, may stimulate an autoimmune response. However, older individuals with various comorbidities are both at risk of developing AHA and of COVID-19-related morbidity and mortality. Therefore, the COVID-19 vaccine must always be administered because the benefits still outweigh the risks. Yet, we should consider the rare possibility that the activation of an immunological response through vaccination may result in AHA. Detailed registries and prospective studies would be necessary to analyze this post-vaccine acquired bleeding disorder, looking for possible markers and underlying risk factors for developing the disease in association with vaccination.
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Affiliation(s)
- Roberto Castelli
- Department of Medical Surgical and Pharmacology, University of Sassari, 07100 Sassari, Italy; (R.M.); (P.C.); (A.P.D.)
| | - Antonio Gidaro
- Department of Biomedical and Clinical Sciences Luigi Sacco, Luigi Sacco Hospital, University of Milan, 20157 Milan, Italy
| | - Roberto Manetti
- Department of Medical Surgical and Pharmacology, University of Sassari, 07100 Sassari, Italy; (R.M.); (P.C.); (A.P.D.)
| | - Paolo Castiglia
- Department of Medical Surgical and Pharmacology, University of Sassari, 07100 Sassari, Italy; (R.M.); (P.C.); (A.P.D.)
| | - Alessandro Palmerio Delitala
- Department of Medical Surgical and Pharmacology, University of Sassari, 07100 Sassari, Italy; (R.M.); (P.C.); (A.P.D.)
| | - Pier Mannuccio Mannucci
- Fondazione Istituto di Ricerca e Cura a Carattere Scientifico Ca’ Granda Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi, Hemophilia and Thrombosis, 20122 Milan, Italy;
| | - Samantha Pasca
- U.O. Immunohematology and Transfusion—APSS of Trento, 38122 Trento, Italy;
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3
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Wu PC, Huang IH, Wang CY, Chi CC. New Onset and Exacerbation of Autoimmune Bullous Dermatosis Following COVID-19 Vaccination: A Systematic Review. Vaccines (Basel) 2024; 12:465. [PMID: 38793716 PMCID: PMC11125893 DOI: 10.3390/vaccines12050465] [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: 03/04/2024] [Revised: 04/14/2024] [Accepted: 04/24/2024] [Indexed: 05/26/2024] Open
Abstract
BACKGROUND Cases of autoimmune bullous dermatosis (AIBD) have been reported following COVID-19 vaccination. OBJECTIVE We aimed to provide an overview of clinical characteristics, treatments, and outcomes of AIBDs following COVID-19 vaccination. METHODS We conducted a systematic review and searched the Embase, Cochrane Library, and Medline databases from their inception to 27 March 2024. We included all studies reporting ≥ 1 patient who developed new-onset AIBD or experienced flare of AIBD following at least one dose of any COVID-19 vaccine. RESULTS We included 98 studies with 229 patients in the new-onset group and 216 in the flare group. Among the new-onset cases, bullous pemphigoid (BP) was the most frequently reported subtype. Notably, mRNA vaccines were commonly associated with the development of AIBD. Regarding the flare group, pemphigus was the most frequently reported subtype, with the mRNA vaccines being the predominant vaccine type. The onset of AIBD ranged from 1 to 123 days post-vaccination, with most patients displaying favorable outcomes and showing improvement or resolution from 1 week to 8 months after treatment initiation. CONCLUSIONS Both new-onset AIBD and exacerbation of pre-existing AIBD may occur following COVID-19 vaccination. Healthcare practitioners should be alert, and post-vaccination monitoring may be essential.
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Affiliation(s)
- Po-Chien Wu
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou Main Branch, Taoyuan 33305, Taiwan; (P.-C.W.); (I.-H.H.)
| | - I-Hsin Huang
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou Main Branch, Taoyuan 33305, Taiwan; (P.-C.W.); (I.-H.H.)
| | - Ching-Ya Wang
- Department of Dermatology, Heping Fuyou Branches, Taipei City Hospital Renai, Taipei 10629, Taiwan;
| | - Ching-Chi Chi
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou Main Branch, Taoyuan 33305, Taiwan; (P.-C.W.); (I.-H.H.)
- School of Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
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Ikbel G, Hela B, Yassine KM, Hamida K, Kamel BS. Outcomes of Emicizumab in Acquired Hemophilia Patients: A Systematic Review. Clin Appl Thromb Hemost 2024; 30:10760296241298661. [PMID: 39543979 PMCID: PMC11565686 DOI: 10.1177/10760296241298661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2024] [Revised: 10/23/2024] [Accepted: 10/23/2024] [Indexed: 11/17/2024] Open
Abstract
BACKGROUND Emicizumab, a bispecific factor VIII mimetic antibody, was approved in 2018 for bleeding prophylaxis in congenital hemophilia A with or without inhibitors. Since then, several case reports and case series have described the off-label use of emicizumab in acquired hemophilia A (AHA), and data from two clinical trials were recently published (AGEHA, GTH-AHA-EMI). OBJECTIVES To describe the reported data on the outcomes of emicizumab, highlighting its benefit/risk profile in treatment. METHODS We conducted a literature search in PubMed, Scopus, Cochrane, and Google Scholar up to August 2024, including all scientific articles reporting clinical outcomes of emicizumab use in patients with AHA. RESULTS Thirty-two studies were included in the final review, covering a total of 171 AHA patients. The majority started emicizumab for active bleeding management and prophylaxis with various regimens. Follow-up duration and remission criteria varied. Two clinical trials supported the use of emicizumab for bleeding prophylaxis with a new dosing regimen and completion criteria. Bleeding was well managed in all cases, with no major recurrent bleeds. Some adverse events were reported : 3 cases of deep venous thrombosis, 2 cases of stroke, and 2 cases of anti-emicizumab drug antibodies developing in patients with thromboembolic risk factors. CONCLUSIONS Based on published data, emicizumab appears to be effective in bleeding management and prophylaxis in AHA patients, with a favorable benefit/risk profile.
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Affiliation(s)
- Ghachem Ikbel
- Department of Hematology, University El Manar Faculty of medecine of Tunis, Tunis, Tunisia
- Laboratory of Hematology, Taher Maamouri Hospital, Nabeul, Tunisia
| | - Baccouche Hela
- Department of Hematology, University El Manar Faculty of medecine of Tunis, Tunis, Tunisia
- Laboratory of Hematology and blood bank, Rabta, Tunis, Tunisia
| | - Kaabar Mohamed Yassine
- Laboratory of Hematology, Taher Maamouri Hospital, Nabeul, Tunisia
- Faculty of Medecine of Monastir Tunisia, University of Monastir, Monastir, Tunisia
| | - Khemiri Hamida
- Internal Medicine Department, Taher Maamouri Hospital, Nabeul, Tunisia
| | - Ben Salem Kamel
- Faculty of Medecine of Monastir Tunisia, University of Monastir, Monastir, Tunisia
- Department of Preventive and Community Medecine, University of Monastir, Faculty of Medecine of Monastir, Monastir, Tunisia
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5
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Ianuà E, Caldarelli M, De Matteis G, Cianci R, Gambassi G. Hematological Complications in a COVID-19 Patient: A Case Report. Diseases 2023; 12:5. [PMID: 38248356 PMCID: PMC10814038 DOI: 10.3390/diseases12010005] [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: 11/24/2023] [Revised: 12/18/2023] [Accepted: 12/22/2023] [Indexed: 01/23/2024] Open
Abstract
Hemophilia A is a hemorrhagic disorder caused by insufficient or inadequate coagulation factor VIII activity. Two different forms are described: congenital, hereditary X-linked, and acquired. Acquired hemophilia A (AHA) is a rare condition and it is defined by the production of autoantibodies neutralizing factor VIII, known as inhibitors. We report the case of a 72-year-old man with a clinical diagnosis of AHA after SARS-CoV-2 infection, which has been described in association with several hematological complications. SARS-CoV-2 infection could represent the immunological trigger for the development of autoantibodies. In our patient, SARS-CoV-2 infection preceded the hemorrhagic complications by 15 days. This lag time is in line with the other cases reported and compatible with the development of an intense immune response with autoantibody production. It is possible that since our patient was affected by type 1 diabetes mellitus, he was more prone to an immune system pathological response against self-antigens. A prompt, appropriate therapeutic intervention with activated recombinant factor VII administration and cyclophosphamide has led to rapid remission of clinical and laboratory findings.
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Affiliation(s)
| | | | | | - Rossella Cianci
- Department of Translational Medicine and Surgery, Catholic University, Fondazione Policlinico Universitario “Agostino Gemelli”, IRCCS, 00168 Rome, Italy; (E.I.); (M.C.); (G.D.M.); (G.G.)
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Poston J, Kruse-Jarres R. The role of emicizumab in acquired hemophilia A. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2023; 2023:24-30. [PMID: 38066880 PMCID: PMC10727101 DOI: 10.1182/hematology.2023000462] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Acquired hemophilia is a rare bleeding disorder that predominantly affects older people with potential underlying comorbidities, including cardiovascular and thrombotic risk factors. The current standard therapies with hemostatic agents for acute bleeding and immunosuppression often require inpatient management, are not approved for routine bleeding prophylaxis, and contribute to the high mortality in this population. Emicizumab is a factor VIII (FVIII) mimetic approved for bleeding prophylaxis in congenital hemophilia A with and without FVIII inhibitors. Given subcutaneously, it may allow easier outpatient bleeding prophylaxis and reduce intensity of immunosuppression. This article summarizes the currently available data on the efficacy and safety of emicizumab in acquired hemophilia A.
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Affiliation(s)
- Jacqueline Poston
- Department of Pathology & Laboratory Medicine, Larner College of Medicine at the University of Vermont, Burlington, VT
| | - Rebecca Kruse-Jarres
- Department of Medicine, Larner College of Medicine at the University of Vermont, Burlington, VT
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Pasca S, Zanon E, Mannucci PM, Peyvandi F. Emicizumab in acquired hemophilia A: pros and cons of a new approach to the prevention and treatment of bleeding. BLOOD TRANSFUSION = TRASFUSIONE DEL SANGUE 2023; 21:549-556. [PMID: 36795341 PMCID: PMC10645354 DOI: 10.2450/2023.0247-22] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 12/22/2022] [Indexed: 02/17/2023]
Abstract
Emicizumab, a monoclonal bispecific antibody that mimics the function of activated factor VIII (FVIII), is currently licensed for prophylactic use in patients with congenital hemophilia A with and without inhibitors. Acquired hemophilia A (AHA) is a very rare bleeding disorder caused by the development of autoantibodies that inhibit FVIII activity in plasma; males and females are equally affected. Therapeutic options for patients with AHA currently include eradication of the inhibitor with immunosuppressive treatments and management of acute bleeding with bypassing agents or recombinant porcine FVIII. More recently, several reports described the off-label use of emicizumab in patients with AHA and a phase III study is ongoing in Japan. The aims of this review are to describe the 73 reported cases, and to highlight the advantages and disadvantages of this novel approach to the prevention and treatment of bleeding in AHA.
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Affiliation(s)
- Samantha Pasca
- Biological Sciences Department (DSB), Padua University Hospital, Padua, Italy
| | - Ezio Zanon
- Hemophilia Center - General Medicine, Padua University Hospital, Padua, Italy
| | - Pier Mannuccio Mannucci
- Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center and Fondazione Luigi Villa, Milan, Italy
| | - Flora Peyvandi
- Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center and Fondazione Luigi Villa, Milan, Italy
- Università degli Studi di Milano, Department of Pathophysiology and Transplantation, Milan, Italy
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8
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Sekulovski M, Mileva N, Vasilev GV, Miteva D, Gulinac M, Peshevska-Sekulovska M, Chervenkov L, Batselova H, Vasilev GH, Tomov L, Lazova S, Vassilev D, Velikova T. Blood Coagulation and Thrombotic Disorders following SARS-CoV-2 Infection and COVID-19 Vaccination. Biomedicines 2023; 11:2813. [PMID: 37893186 PMCID: PMC10604891 DOI: 10.3390/biomedicines11102813] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/25/2023] [Accepted: 09/29/2023] [Indexed: 10/29/2023] Open
Abstract
Although abundant data confirm the efficacy and safety profile of the developed vaccines against COVID-19, there are still some concerns regarding vaccination in high-risk populations. This is especially valid for patients susceptible to thrombotic or bleeding events and hesitant people due to the fear of thrombotic incidents following vaccination. This narrative review focuses on various inherited and acquired thrombotic and coagulation disorders and the possible pathophysiologic mechanisms interacting with the coagulation system during immunization in view of the currently available safety data regarding COVID-19 vaccines. Inherited blood coagulation disorders and inherited thrombotic disorders in the light of COVID-19, as well as blood coagulation and thrombotic disorders and bleeding complications following COVID-19 vaccines, along with the possible pathogenesis hypotheses, therapeutic interventions, and imaging for diagnosing are discussed in detail. Lastly, the lack of causality between the bleeding and thrombotic events and COVID-19 vaccines is debated, but still emphasizes the importance of vaccination against COVID-19, outweighing the minimal risk of potential rare adverse events associated with coagulation.
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Affiliation(s)
- Metodija Sekulovski
- Department of Anesthesiology and Intensive Care, University Hospital Lozenetz, Kozyak Str., 1407 Sofia, Bulgaria
- Medical Faculty, Sofia University, St. Kliment Ohridski, Kozyak 1 Str., 1407 Sofia, Bulgaria; (G.V.V.); (D.M.); (M.G.); (M.P.-S.); (G.H.V.); (L.T.); (S.L.); (T.V.)
| | - Niya Mileva
- Medical Faculty, Medical University of Sofia, 1 Georgi Sofiiski Str., 1431 Sofia, Bulgaria;
| | - Georgi Vasilev Vasilev
- Medical Faculty, Sofia University, St. Kliment Ohridski, Kozyak 1 Str., 1407 Sofia, Bulgaria; (G.V.V.); (D.M.); (M.G.); (M.P.-S.); (G.H.V.); (L.T.); (S.L.); (T.V.)
- Clinic of Endocrinology and Metabolic Disorders, University Multiprofil Hospital Active Treatement “Sv. Georgi”, 4000 Plovdiv, Bulgaria
| | - Dimitrina Miteva
- Medical Faculty, Sofia University, St. Kliment Ohridski, Kozyak 1 Str., 1407 Sofia, Bulgaria; (G.V.V.); (D.M.); (M.G.); (M.P.-S.); (G.H.V.); (L.T.); (S.L.); (T.V.)
- Department of Genetics, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tzankov Str., 1164 Sofia, Bulgaria
| | - Milena Gulinac
- Medical Faculty, Sofia University, St. Kliment Ohridski, Kozyak 1 Str., 1407 Sofia, Bulgaria; (G.V.V.); (D.M.); (M.G.); (M.P.-S.); (G.H.V.); (L.T.); (S.L.); (T.V.)
- Department of General and Clinical Pathology, Medical University of Plovdiv, Bul. Vasil Aprilov 15A, 4000 Plovdiv, Bulgaria
| | - Monika Peshevska-Sekulovska
- Medical Faculty, Sofia University, St. Kliment Ohridski, Kozyak 1 Str., 1407 Sofia, Bulgaria; (G.V.V.); (D.M.); (M.G.); (M.P.-S.); (G.H.V.); (L.T.); (S.L.); (T.V.)
- Department of Gastroenterology, University Hospital Lozenetz, 1407 Sofia, Bulgaria
| | - Lyubomir Chervenkov
- Department of Diagnostic Imaging, Medical University of Plovdiv, Bul. Vasil Aprilov 15A, 4000 Plovdiv, Bulgaria;
| | - Hristiana Batselova
- Department of Epidemiology and Disaster Medicine, Medical University of Plovdiv, University Hospital “St George”, 4000 Plovdiv, Bulgaria;
| | - Georgi Hristov Vasilev
- Medical Faculty, Sofia University, St. Kliment Ohridski, Kozyak 1 Str., 1407 Sofia, Bulgaria; (G.V.V.); (D.M.); (M.G.); (M.P.-S.); (G.H.V.); (L.T.); (S.L.); (T.V.)
- Laboratory of Hematopathology and Immunology, National Specialized Hospital for Active Treatment of Hematological Diseases, 1756 Sofia, Bulgaria
| | - Latchezar Tomov
- Medical Faculty, Sofia University, St. Kliment Ohridski, Kozyak 1 Str., 1407 Sofia, Bulgaria; (G.V.V.); (D.M.); (M.G.); (M.P.-S.); (G.H.V.); (L.T.); (S.L.); (T.V.)
- Department of Informatics, New Bulgarian University, Montevideo 21 Str., 1618 Sofia, Bulgaria
| | - Snezhina Lazova
- Medical Faculty, Sofia University, St. Kliment Ohridski, Kozyak 1 Str., 1407 Sofia, Bulgaria; (G.V.V.); (D.M.); (M.G.); (M.P.-S.); (G.H.V.); (L.T.); (S.L.); (T.V.)
- Pediatric Clinic, University Hospital “N. I. Pirogov”, 21 “General Eduard I. Totleben” Blvd, 1606 Sofia, Bulgaria
- Department of Healthcare, Faculty of Public Health “Prof. Tsekomir Vodenicharov, MD, DSc”, Medical University of Sofia, Bialo More 8 Str., 1527 Sofia, Bulgaria
| | - Dobrin Vassilev
- Faculty of Public Health and Healthcare, Ruse University Angel Kanchev, 7017 Ruse, Bulgaria;
| | - Tsvetelina Velikova
- Medical Faculty, Sofia University, St. Kliment Ohridski, Kozyak 1 Str., 1407 Sofia, Bulgaria; (G.V.V.); (D.M.); (M.G.); (M.P.-S.); (G.H.V.); (L.T.); (S.L.); (T.V.)
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Bahrini K, Hannachi E. Does SARS-CoV-2vaccination induce acquired autoimmune discords and inflammatory manifestations? Clinics (Sao Paulo) 2023; 78:100257. [PMID: 37499426 PMCID: PMC10413055 DOI: 10.1016/j.clinsp.2023.100257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 07/05/2023] [Indexed: 07/29/2023] Open
Affiliation(s)
- Khadija Bahrini
- Research Unit UR17DN05, Military Hospital of Tunis, Tunis El-Manar University, Tunis, Tunisia.
| | - Emna Hannachi
- Laboratoire de Parasitologie Médicale, Biotechnologies et Biomolécules; LR11-IPT06; Institut Pasteur de Tunis, Université Tunis El-Manar, Tunis-Belvédère, Tunisia
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10
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Acquired Hemophilia A: An Update on the Etiopathogenesis, Diagnosis, and Treatment. Diagnostics (Basel) 2023; 13:diagnostics13030420. [PMID: 36766524 PMCID: PMC9914651 DOI: 10.3390/diagnostics13030420] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/10/2023] [Accepted: 01/20/2023] [Indexed: 01/25/2023] Open
Abstract
Acquired haemophilia A (AHA) is a rare bleeding disorder caused by inhibitory autoantibodies against coagulation factor VIII (FVIII). AHA is a disease that most commonly affects the elderly but has also been observed in children and in the postpartum period. AHA is idiopathic in 50% of cases and is associated with autoimmune diseases, malignancies, and infections in the remaining 50%. Recently, cases of association between AHA, COVID-19 vaccination, and infection have been reported in the literature. For diagnoses, determining FVIII levels is crucial to distinguish the different causes of aPTT prolongation. Treatment of AHA is based on bypassing agents (recombinant factor VIIa, activated prothrombin complex concentrate) and porcine FVIII to control the bleeding and immunosuppressive therapy (corticosteroids, rituximab, cyclophosphamide) to suppress autoantibody production. It is important to start a prophylactic regimen to prevent further bleeding episodes until the inhibitor is negative. Recently, the series of cases reported in the literature suggest that emicizumab may provide effective and safe haemorrhage prophylaxis in the outpatient setting.
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11
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Favaloro EJ, Pasalic L, Lippi G. Autoimmune Diseases Affecting Hemostasis: A Narrative Review. Int J Mol Sci 2022; 23:ijms232314715. [PMID: 36499042 PMCID: PMC9738541 DOI: 10.3390/ijms232314715] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/20/2022] [Accepted: 11/24/2022] [Indexed: 11/26/2022] Open
Abstract
Hemostasis reflects a homeostatic mechanism that aims to balance out pro-coagulant and anti-coagulant forces to maintain blood flow within the circulation. Simplistically, a relative excess of procoagulant forces can lead to thrombosis, and a relative excess of anticoagulant forces can lead to bleeding. There are a wide variety of congenital disorders associated with bleeding or thrombosis. In addition, there exist a vast array of autoimmune diseases that can also lead to either bleeding or thrombosis. For example, autoantibodies generated against clotting factors can lead to bleeding, of which acquired hemophilia A is the most common. As another example, autoimmune-mediated antibodies against phospholipids can generate a prothrombotic milieu in a condition known as antiphospholipid (antibody) syndrome (APS). Moreover, there exist various autoimmunity promoting environments that can lead to a variety of antibodies that affect hemostasis. Coronavirus disease 2019 (COVID-19) represents perhaps the contemporary example of such a state, with potential development of a kaleidoscope of such antibodies that primarily drive thrombosis, but may also lead to bleeding on rarer occasions. We provide here a narrative review to discuss the interaction between various autoimmune diseases and hemostasis.
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Affiliation(s)
- Emmanuel J. Favaloro
- Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), Sydney Centres for Thrombosis and Haemostasis, NSW Health Pathology, Westmead Hospital, Westmead, Sydney, NSW 2145, Australia
- School of Dentistry and Medical Sciences, Faculty of Science and Health, Charles Sturt University, Wagga Wagga, NSW 2678, Australia
- School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, Westmead Hospital, Westmead, Sydney, NSW 2145, Australia
- Correspondence: ; Tel.: +61-2-8890-6618
| | - Leonardo Pasalic
- Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), Sydney Centres for Thrombosis and Haemostasis, NSW Health Pathology, Westmead Hospital, Westmead, Sydney, NSW 2145, Australia
- Westmead Clinical School, University of Sydney, Westmead, Sydney, NSW 2006, Australia
| | - Giuseppe Lippi
- Section of Clinical Biochemistry, University of Verona, 37129 Verona, Italy
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