Article: [Novel disease entities due to antiplatelet factor 4 antibodies: HIT, aHIT, and VITT].
Rinsho ketsueki] The Japanese journal of clinical hematology
2022 Volume 63, Issue 5, Page(s) 454–462
Abstract: Antiplatelet factor 4 (PF4) antibodies, also known as anti-PF4/heparin complex antibodies, are measured to diagnose heparin-induced thrombocytopenia (HIT). In HIT, anti-PF4 antibodies induced by heparin exposure cause thrombocytopenia and thrombosis. ... ...
Abstract | Antiplatelet factor 4 (PF4) antibodies, also known as anti-PF4/heparin complex antibodies, are measured to diagnose heparin-induced thrombocytopenia (HIT). In HIT, anti-PF4 antibodies induced by heparin exposure cause thrombocytopenia and thrombosis. However, in recent years, autoimmune HIT (aHIT) that develops without heparin exposure has been getting attention. In 2021, anti-PF4 antibodies were reported to cause the fatal vaccine-induced immune thrombotic thrombocytopenia (VITT) that developed after adenoviral vector vaccination for COVID-19. HIT, aHIT, and VITT are considered to be caused by anti-PF4 antibodies, and their pathological conditions are similar. However, they have different levels of severity, and the detection sensitivity of their antibodies varies depending on the assay. Herein, we review three pathologies, namely, HIT, aHIT, and VITT, associated with anti-PF4 antibodies. |
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MeSH term(s) | Antibodies ; COVID-19 ; Heparin/adverse effects ; Humans ; Platelet Factor 4/immunology ; Purpura, Thrombocytopenic, Idiopathic ; Thrombocytopenia/chemically induced ; Thrombocytopenia/diagnosis ; Thrombosis/etiology ; Vaccines/adverse effects |
Chemical Substances | Antibodies ; Vaccines ; Platelet Factor 4 (37270-94-3) ; Heparin (9005-49-6) |
Language | Japanese |
Publishing date | 2022-05-30 |
Publishing country | Japan |
Document type | Journal Article ; Review |
ZDB-ID | 390900-1 |
ISSN | 0485-1439 |
ISSN | 0485-1439 |
DOI | 10.11406/rinketsu.63.454 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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