Journal article
Authors list: Tiede, Andreas; Sachs, Ulrich J.; Czwalinna, Andreas; Werwitzke, Sonja; Bikker, Rolf; Krauss, Joachim K.; Donnerstag, Frank; Weissenborn, Karin; Hoeglinger, Gunter; Maasoumy, Benjamin; Wedemeyer, Heiner; Ganser, Arnold
Publication year: 2021
Pages: 350-353
Journal: Blood
Volume number: 138
Issue number: 4
ISSN: 0006-4971
eISSN: 1528-0020
Open access status: Green
DOI Link: https://doi.org/10.1182/blood.2021011958
Publisher: American Society of Hematology (ASH Publications)
Abstract:
We report 5 cases of prothrombotic immune thrombocytopenia after exposure to the ChAdOx1 vaccine (AZD1222, Vaxzevria) against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Patients presented 5 to 11 days after first vaccination. The spectrum of clinical manifestations included cerebral venous sinus thrombosis, splanchnic vein thrombosis, arterial cerebral thromboembolism, and thrombotic microangiopathy. All patients had thrombocytopenia and markedly elevated D-dimer. Autoantibodies against platelet factor 4 (PF4) were detected in all patients, although they had never been exposed to heparin. Immunoglobulin from patient sera bound to healthy donor platelets in an AZD1222-dependent manner, suppressed by heparin. Aggregation of healthy donor platelets by patient sera was demonstrated in the presence of buffer or AZD1222 and was also suppressed by heparin. Anticoagulation alone or in combination with eculizumab or intravenous immunoglobulin (IVIG) resolved the pathology in 3 patients. Two patients had thromboembolic events despite anticoagulation at a time when platelets were increasing after IVIG. In summary, an unexpected autoimmune prothrombotic disorder is described after vaccination with AZD1222. It is characterized by thrombocytopenia and anti-PF4 antibodies binding to platelets in AZD1222-dependent manner. Initial clinical experience suggests a risk of unusual and severe thromboembolic events.
Citation Styles
Harvard Citation style: Tiede, A., Sachs, U., Czwalinna, A., Werwitzke, S., Bikker, R., Krauss, J., et al. (2021) Prothrombotic immune thrombocytopenia after COVID-19 vaccination, Blood, 138(4), pp. 350-353. https://doi.org/10.1182/blood.2021011958
APA Citation style: Tiede, A., Sachs, U., Czwalinna, A., Werwitzke, S., Bikker, R., Krauss, J., Donnerstag, F., Weissenborn, K., Hoeglinger, G., Maasoumy, B., Wedemeyer, H., & Ganser, A. (2021). Prothrombotic immune thrombocytopenia after COVID-19 vaccination. Blood. 138(4), 350-353. https://doi.org/10.1182/blood.2021011958
