Vaccine-Induced Immune Thrombotic Thrombocytopenia

A special issue of Vaccines (ISSN 2076-393X). This special issue belongs to the section "Vaccine Efficacy and Safety".

Deadline for manuscript submissions: closed (31 March 2025) | Viewed by 1331

Special Issue Editors


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Guest Editor
Department of Safety of Biomedicines and Diagnostics, Paul-Ehrlich-Institut, Federal Institute for Vaccines and Biomedicines, Langen, Germany
Interests: pharmacoepidemiology; pharmacovigilance; biostatistics; vaccines; biomedicines

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Co-Guest Editor
Institute for Transfusion Medicine, University Hospital Greifswald, 17487 Greifswald, Germany
Interests: immunothrombosis; transfusion medicine

Special Issue Information

Dear Colleagues,

We are releasing a Special Issue of Vaccines on vaccine-induced immune thrombotic thrombocytopenia (VITT), a rare adverse event following immunization (AEFI) associated with COVID-19 vaccines. We aim to deepen our understanding of VITT and welcome submissions on mechanisms, clinical manifestations, diagnostic criteria, and management strategies.

The Special Issue is open for submissions until 30 September 2024. Accepted manuscripts will contribute to our understanding of VITT, benefiting healthcare professionals, researchers, and policymakers in making informed decisions.

Thank you for your contributions.

Dr. Doris F. Oberle
Dr. Linda Schönborn
Guest Editors

Manuscript Submission Information

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Keywords

  • vaccine-induced immune thrombotic thrombocytopenia
  • VITT
  • adverse events following immunization
  • AEFI
  • COVID-19 vaccines

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Published Papers (1 paper)

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Research

13 pages, 1427 KiB  
Article
Recombinant Anti-PF4 Antibodies Derived from Patients with Vaccine-Induced Immune Thrombocytopenia and Thrombosis (VITT) Facilitate Research and Laboratory Diagnosis of VITT
by Luisa Müller, Venkata A. S. Dabbiru, Lucy Rutten, Rinke Bos, Roland Zahn, Stefan Handtke, Thomas Thiele, Marta Palicio, Olga Esteban, Marta Broto, Tom Paul Gordon, Andreas Greinacher, Jing Jing Wang and Linda Schönborn
Vaccines 2025, 13(1), 3; https://doi.org/10.3390/vaccines13010003 - 24 Dec 2024
Viewed by 894
Abstract
Background/Objectives: Adenoviral vector-based vaccines against COVID-19 rarely cause vaccine-induced immune thrombocytopenia and thrombosis (VITT), a severe adverse reaction caused by IgG antibodies against platelet factor 4 (PF4). To study VITT, patient samples are crucial but have become a scarce resource. Recombinant antibodies (rAbs) [...] Read more.
Background/Objectives: Adenoviral vector-based vaccines against COVID-19 rarely cause vaccine-induced immune thrombocytopenia and thrombosis (VITT), a severe adverse reaction caused by IgG antibodies against platelet factor 4 (PF4). To study VITT, patient samples are crucial but have become a scarce resource. Recombinant antibodies (rAbs) derived from VITT patient characteristic amino acid sequences of anti-PF4 IgG are an alternative to study VITT pathophysiology. Methods: Amino acid sequences of the variable region of immunoglobulin light and heavy chain of anti-PF4 IgG derived from VITT patients were obtained by mass spectrometry sequencing and rAbs were synthetized by reverse-engineering. Six different rAbs were produced: CR23003, CR23004, and CR23005 (from a patient vaccinated with Jcovden, Johnson & Johnson-Janssen (Beerse, Belgium)), CR22046, and CR22050 and CR22066 (from two different patients vaccinated with Vaxzevria, AstraZeneca (Cambridge, UK)). These rAbs were further characterized using anti-PF4 and anti-PF4/heparin IgG ELISAs, rapid anti-PF4 and anti-PF4/polyanion chemiluminescence assays, and PF4-induced platelet activation assay (PIPA) and their capacity to induce procoagulant platelets. Results: rAbs bound to PF4 alone, but not to PF4/polyanion complexes in rapid chemiluminescence assays. Chemiluminescence assays and both anti-PF4 IgG and anti-PF4 IgG/heparin ELISA showed concentration-dependent PF4 binding of all six rAbs, however, with different reactivities among them. PIPA showed a similar, concentration-dependent platelet activation pattern. rAbs varied in their reactivity and the majority of the tested rAbs were able to induce procoagulant platelets. Conclusions: The six rAbs derived from VITT patients reflect VITT-typical binding capacities and the ability to activate platelets. Therefore, these rAbs offer an attractive new option to study VITT pathophysiology. Full article
(This article belongs to the Special Issue Vaccine-Induced Immune Thrombotic Thrombocytopenia)
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