With the rapid and massive vaccination campaign against coronavirus disease 2019 (COVID-19) taking place across the globe, there are increasing reports of thrombotic complications with various COVID-19 vaccines such as the Pfizer-BioNTech mRNA, Moderna mRNA, AstraZeneca Oxford (serum institute), and Johnson & Johnson/Janssen vaccines. We report a case of successful organ donation from an 18-year-old woman who presented with cerebral venous thrombosis caused by vaccine-induced thrombotic thrombocytopenia following the first dose of the COVID-19 vaccine (AstraZeneca, University of Oxford, and Serum Institute of India), which caused brain death. Four recipients received 5 organs, kidneys (2), liver (1), and combined heart and lung (1). All 4 recipients had normal graft function without any thrombotic complications after 16 weeks of transplantation. This is first such case being reported from Asian countries.
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http://dx.doi.org/10.1016/j.transproceed.2021.11.002 | DOI Listing |
J Thromb Haemost
December 2024
Laboratory of Immunopharmacology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil. Electronic address:
Background: Although rare, vaccine-induced thrombotic thrombocytopenia (VITT) following adenoviral vector COVID-19 vaccination is a concerning and often severe adverse effect of vaccination. The generation of high anti-platelet factor 4 (PF4) antibody titers, promotes the formation of immune complexes capable of activating platelets and neutrophils through FcγRIIa.
Objective: Given that Platelet-leukocyte aggregate (PLA) formation and inflammasome activation are common features of thromboinflammatory diseases, we aimed to evaluate if these are also features of VITT.
Vaccine-induced immune thrombotic thrombocytopenia (VITT) is a rare but serious prothrombotic adverse event following vaccination with adenovector-based COVID-19 vaccines. Laboratory findings indicate that anti-platelet factor 4 (PF4) immunoglobulin G antibodies are the causing factor for the onset of thromboembolic events in VITT. However, molecular mechanisms of cellular interactions, signaling pathways and involvement of different cell types in VITT antibody-mediated thrombosis are not fully understood.
View Article and Find Full Text PDFImmunol Res
December 2024
Department of Zoology, Deshbandhu College, University of Delhi, New Delhi, 110019, India.
Currently, COVID-19 is still striking after 4 years of prevalence, with millions of cases and thousands of fatalities being recorded every month. The virus can impact other major organ systems, including the gastrointestinal tract (GIT), cardiovascular, central nervous system, renal, and hepatobiliary systems. The resulting organ dysfunction from SARS-CoV-2 may be attributed to one or a combination of mechanisms, such as direct viral toxicity, disruptions in the renin-angiotensin-aldosterone system (RAAS), thrombosis, immune dysregulation, and ischemic injury due to vasculitis.
View Article and Find Full Text PDFHematology Am Soc Hematol Educ Program
December 2024
Haemophilia Comprehensive Care Centre, Queen Elizabeth Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom.
Antibodies to platelet factor 4 (PF4) have been primarily linked to classical heparin-induced thrombocytopenia (cHIT). However, during the rollout of the COVID-19 vaccine program a new condition, vaccine-induced thrombocytopenia and thrombosis (VITT), was identified, related to adenoviral-based COVID-19 vaccines. The differences between these 2 conditions, both clinically and in laboratory testing, set the scene for the development of a new rapid anti-PF4 assay that is not linked with heparin (as relevant for cHIT).
View Article and Find Full Text PDFJHEP Rep
December 2024
Barcelona Hepatic Hemodynamic Laboratory, Liver Unit, Hospital Clínic, Institut de InvestigacionsBiomèdiques August Pi iSunyer (IDIBAPS), Departament de Medicina I Ciències de la Salut - University of Barcelona, Barcelona. CIBEREHD (Centro de Investigación Biomédica en Red Enfermedades Hepáticas y Digestivas). Health Care Provider of the European Reference Network on Rare Liver Disorders (ERN-Rare Liver), Spain.
Background & Aims: Patients with vascular liver diseases (VLD) are at higher risk of both severe courses of COVID-19 disease and thromboembolic events. The impact of SARS-CoV-2 vaccination in patients with VLD has not been described and represents the aim of our study.
Methods: International, multicenter, prospective observational study in patients with VLD analyzing the incidence of COVID-19 infection after vaccination, severity of side effects, occurrence of thromboembolic events and hepatic decompensation.
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