• Anti-PF4/polyanion antibodies in COVID-19 patients are associated with disease severity and pulmonary pathology 

      Ueland, Thor; Sørvoll, Ingvild Hausberg; Mørtberg, Trude Victoria; Dahl, Tuva Børresdatter; Lerum, Tøri Vigeland; Michelsen, Annika Elisabet; Ranheim, Trine; Nezvalova-Henriksen, Katerina; Dyrhol-Riise, Anne Ma; Holme, Pål Andre; Aaløkken, Trond Mogens; Skjønsberg, Ole Henning; Barratt-Due, Andreas; Ahlen, Maria Therese; Aukrust, Pål; Halvorsen, Bente (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-28)
      Thromboembolic events are frequent and associated with poor outcome in severe COVID-19 disease. Anti-PF4/polyanion antibodies are related to heparin-induced thrombocytopenia (HIT) and thrombus formation, but data on these antibodies in unselected COVID-19 populations are scarce. We assessed the presence of anti-PF4/polyanion antibodies in prospectively collected serum from an unselected cohort ...
    • Prevention of Fetal/Neonatal Alloimmune Thrombocytopenia (FNAIT) by prophylactic monoclonal antibodies. In vitro and preclinical evaluation of HPA-1a-specific antibodies 

      Mørtberg, Trude Victoria (Doctoral thesis; Doktorgradsavhandling, 2023-10-19)
      The focus of this thesis is the condition fetal/neonatal alloimmune thrombocytopenia (FNAIT) where maternal alloantibodies toward paternally inherited human platelet antigens (HPAs) cause depletion of fetal platelets. Clinical outcomes are heterogenous and can be asymptomatic, mild or severe bleedings, where intracranial hemorrhage (ICH) is the feared outcome as it may lead to lifelong disabilities ...
    • Prevention of Fetal/Neonatal Alloimmune Thrombocytopenia in Mice: Biochemical and Cell Biological Characterization of Isoforms of a Human Monoclonal Antibody 

      Mørtberg, Trude Victoria; Zhi, Huiying; Vidarsson, Gestur; Foss, Stian; Lissenberg-Thunnissen, Suzanne; Wuhrer, Manfred; Michaelsen, Terje Einar; Skogen, Bjørn; Stuge, Tor Brynjar; Andersen, Jan Terje; Newman, Peter J.; Ahlen, Maria Therese (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-01)
      Maternal alloantibodies toward paternally inherited Ags on fetal platelets can cause thrombocytopenia and bleeding complications in the fetus or neonate, referred to as fetal and neonatal alloimmune thrombocytopenia (FNAIT). This is most commonly caused by Abs against the human platelet Ag (HPA)-1a in Caucasians, and a prophylactic regimen to reduce the risk for alloimmunization to women at risk ...
    • Thrombosis and thrombocytopenia after HPV vaccination 

      Johansen, Silje; Lægreid, Ingvild Jenssen; Ernstsen, Siw Leiknes; Azrakhsh, Nessar Ahmad; Kittang, Astrid Marta Olsnes; Lindås, Roald; Gjertsen, Bjørn Tore; Vetti, Nils; Mørtberg, Trude Victoria; Sørvoll, Ingvild Hausberg; Holme, Pål Andre; Ahlen, Maria Therese; Reikvam, Håkon (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-24)
      Background - Vaccine-induced immune thrombotic thrombocytopenia (VITT) has so far only been reported after adenovirus vector severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines.<p> <p>Objective - We report findings in a 25-year-old woman who presented with thrombocytopenia, venous thrombosis, elevated D-dimer levels, and high levels of platelet-activating antibodies to platelet ...