Browsing NTNU Open by Author "Johnson, Christina"
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A conformational change of complement C5 is required for thrombin-mediated cleavage, revealed by a novel ex vivo human whole blood model preserving full thrombin activity
Nilsson, Per; Johnson, Christina; Quach, Huy Quang; Macpherson, Alex; Durrant, Oliver; Pischke, Soeren; Fure, Hilde; Landsem, Anne; Bergseth, Grete; Schjalm, Camilla; Haugaard-Kedström, Linda M.; Huber-Lang, Markus; van den Elsen, Jean; Brekke, Ole-Lars; Mollnes, Tom Eirik (Peer reviewed; Journal article, 2021)Thrombin activation of C5 connects thrombosis to inflammation. Complement research in whole blood ex vivo necessitates anticoagulation, which potentially interferes with the inflammatory modulation by thrombin. We challenged ... -
Increased complement activation 3 to 6 h after trauma is a predictor of prolonged mechanical ventilation and multiple organ dysfunction syndrome: a prospective observational study
Rognes, Ingrid Nygren; Pischke, Søren Erik; Ottestad, William; Røislien, Jo; Berg, Jens Petter; Johnson, Christina; Eken, Torsten; Mollnes, Tom Eirik (Journal article; Peer reviewed, 2021)Background - Complement activation is a central mechanism in systemic inflammation and remote organ dysfunction following major trauma. Data on temporal changes of complement activation early after injury is largely missing. ... -
Platelet-depletion of whole blood reveals that platelets potentiate the release of IL-8 from leukocytes Into plasma in a thrombin-dependent manner
Quach, Huy Quang; Johnson, Christina; Ekholt, Karin; Islam, Rakibul; Mollnes, Tom Eirik; Nilsson, Per (Journal article; Peer reviewed, 2022)Objective In a recent study, we found an elevated level of interleukin 8 (IL-8) in response to bacterial incubation in thrombin-sufficient human whole blood anticoagulated by the fibrin polymerization blocking peptide GPRP. ... -
Properdin binding to complement activating surfaces depends on initial C3b deposition
Harboe, Morten; Johnson, Christina; Nymo, Stig Haugset; Ekholt, Karin; Schjalm, Camilla; Lindstad, Julie Katrine; Pharo, Anne Margrethe; Hellerud, Bernt C; Ekdahl, Kristina Nilsson; Mollnes, Tom Eirik; Nilsson, Per (Journal article; Peer reviewed, 2017)Two functions have been assigned to properdin; stabilization of the alternative convertase, C3bBb, is well accepted, whereas the role of properdin as pattern recognition molecule is controversial. The presence of ... -
Thrombin Differentially Modulates the Acute Inflammatory Response to Escherichia coli and Staphylococcus aureus in Human Whole Blood
Johnson, Christina; Quach, Huy Quang; Lau, Corinna; Ekholt, Karin; Espevik, Terje; Woodruff, Trent M.; Pischke, Soeren; Mollnes, Tom Eirik; Nilsson, Per (Peer reviewed; Journal article, 2022)Thrombin plays a central role in thromboinflammatory responses, but its activity is blocked in the common ex vivo human whole blood models, making an ex vivo study of thrombin effects on thromboinflammatory responses ...