Marc Michel, Etienne Crickx, Bruno Fattizzo, Wilma Barcellini
{"title":"Autoimmune haemolytic anaemias.","authors":"Marc Michel, Etienne Crickx, Bruno Fattizzo, Wilma Barcellini","doi":"10.1038/s41572-024-00566-2","DOIUrl":null,"url":null,"abstract":"<p><p>Adult autoimmune haemolytic anaemias (AIHAs) include different subtypes of a rare autoimmune disease in which autoantibodies targeting autoantigens expressed on the membrane of autologous red blood cells (RBCs) are produced, leading to their accelerated destruction. In the presence of haemolytic anaemia, the direct antiglobulin test is the cornerstone of AIHA diagnosis. AIHAs are classified according to the isotype and the thermal optimum of the autoantibody into warm (wAIHAs), cold and mixed AIHAs. wAIHAs, the most frequent type of AIHAs, are associated with underlying conditions in ~50% of cases. In wAIHA, IgG autoantibody reacts with autologous RBCs at 37 °C, leading to antibody-dependent cell-mediated cytotoxicity and increased phagocytosis of RBCs in the spleen. Cold AIHAs include cold agglutinin disease (CAD) and cold agglutinin syndrome (CAS) when there is an underlying condition. CAD and cold agglutinin syndrome are IgM cold antibody-driven AIHAs characterized by classical complement pathway-mediated haemolysis. The management of wAIHAs has long been based around corticosteroids and splenectomy and on symptomatic measures and non-specific cytotoxic agents for CAD. Rituximab and the development of complement inhibitors, such as the anti-C1s antibody sutimlimab, have changed the therapeutic landscape of AIHAs, and new promising targeted therapies are under investigation.</p>","PeriodicalId":18910,"journal":{"name":"Nature Reviews Disease Primers","volume":null,"pages":null},"PeriodicalIF":76.9000,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nature Reviews Disease Primers","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1038/s41572-024-00566-2","RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MEDICINE, GENERAL & INTERNAL","Score":null,"Total":0}
引用次数: 0
Abstract
Adult autoimmune haemolytic anaemias (AIHAs) include different subtypes of a rare autoimmune disease in which autoantibodies targeting autoantigens expressed on the membrane of autologous red blood cells (RBCs) are produced, leading to their accelerated destruction. In the presence of haemolytic anaemia, the direct antiglobulin test is the cornerstone of AIHA diagnosis. AIHAs are classified according to the isotype and the thermal optimum of the autoantibody into warm (wAIHAs), cold and mixed AIHAs. wAIHAs, the most frequent type of AIHAs, are associated with underlying conditions in ~50% of cases. In wAIHA, IgG autoantibody reacts with autologous RBCs at 37 °C, leading to antibody-dependent cell-mediated cytotoxicity and increased phagocytosis of RBCs in the spleen. Cold AIHAs include cold agglutinin disease (CAD) and cold agglutinin syndrome (CAS) when there is an underlying condition. CAD and cold agglutinin syndrome are IgM cold antibody-driven AIHAs characterized by classical complement pathway-mediated haemolysis. The management of wAIHAs has long been based around corticosteroids and splenectomy and on symptomatic measures and non-specific cytotoxic agents for CAD. Rituximab and the development of complement inhibitors, such as the anti-C1s antibody sutimlimab, have changed the therapeutic landscape of AIHAs, and new promising targeted therapies are under investigation.
期刊介绍:
Nature Reviews Disease Primers, a part of the Nature Reviews journal portfolio, features sections on epidemiology, mechanisms, diagnosis, management, and patient quality of life. The editorial team commissions top researchers — comprising basic scientists and clinical researchers — to write the Primers, which are designed for use by early career researchers, medical students and principal investigators. Each Primer concludes with an Outlook section, highlighting future research directions. Covered medical specialties include Cardiology, Dermatology, Ear, Nose and Throat, Emergency Medicine, Endocrinology, Gastroenterology, Genetic Conditions, Gynaecology and Obstetrics, Hepatology, Haematology, Infectious Diseases, Maxillofacial and Oral Medicine, Nephrology, Neurology, Nutrition, Oncology, Ophthalmology, Orthopaedics, Psychiatry, Respiratory Medicine, Rheumatology, Sleep Medicine, and Urology.