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Factor V is an immune inhibitor that is expressed at increased levels in leukocytes of patients with severe Covid-19
Jun Wang; Prasanti Kotagiri; Paul Lyons; Federica Mescia; Laura Bergamaschi; Lorinda Turner; Rafia Al-Lamki; Michael D Morgan; Fernando J Calero-Nieto; Karsten Bach; Nicole Mende; Nicola K Wilson; Emily R Watts; - Cambridge Institute of Therapeutic Immunology and Infectious Disease - NIHR Covid BioResource; Patrick Chinnery; Nathalie Kingston; Sofia Papadia; Kathleen Stirrups; Neil Walker; Ravindra K Gupta; Mark Toshner; Michael Weekes; James A Nathan; Sarah Walmsley; Willem Hendrik Ouwehand; Mary Kasanicki; Berthold Gottgens; John C Marioni; Smith GC Smith; Jordan S Pober; John R Bradley.
Afiliação
  • Jun Wang; University of Cambridge
  • Prasanti Kotagiri; University of Cambridge
  • Paul Lyons; University of Cambridge
  • Federica Mescia; University of Cambridge
  • Laura Bergamaschi; University of Cambridge
  • Lorinda Turner; University of Cambridge
  • Rafia Al-Lamki; University of Cambridge
  • Michael D Morgan; University of Cambridge
  • Fernando J Calero-Nieto; University of Cambridge
  • Karsten Bach; University of Cambridge
  • Nicole Mende; University of Cambridge
  • Nicola K Wilson; University of Cambridge
  • Emily R Watts; University of Edinburgh
  • - Cambridge Institute of Therapeutic Immunology and Infectious Disease - NIHR Covid BioResource;
  • Patrick Chinnery; University of Cambridge
  • Nathalie Kingston; University of Cambridge
  • Sofia Papadia; University of Cambridge
  • Kathleen Stirrups; University of Cambridge
  • Neil Walker; University of Cambridge
  • Ravindra K Gupta; University of Cambridge
  • Mark Toshner; University of Cambridge
  • Michael Weekes; Cambridge University
  • James A Nathan; University of Cambridge
  • Sarah Walmsley; University of Edinburgh
  • Willem Hendrik Ouwehand; Prof
  • Mary Kasanicki; Cambridge University Hospitals
  • Berthold Gottgens; University of Cambridge
  • John C Marioni; EMBL-EBI
  • Smith GC Smith; University of Cambridge
  • Jordan S Pober; Yale University
  • John R Bradley; University of Cambridge
Preprint em Inglês | medRxiv | ID: ppmedrxiv-21249801
ABSTRACT
Severe Covid-19 is associated with elevated plasma Factor V (FV) and increased risk of thromboembolism. We report that neutrophils, T regulatory cells (Tregs), and monocytes from patients with severe Covid-19 express FV, and expression correlates with T cell lymphopenia. In vitro full length FV, but not FV activated by thrombin cleavage, suppresses T cell proliferation. Increased and prolonged FV expression by cells of the innate and adaptive immune systems may contribute to lymphopenia in severe Covid-19. Activation by thrombin destroys the immunosuppressive properties of FV. Anticoagulation in Covid-19 patients may have the unintended consequence of suppressing the adaptive immune system.
Licença
cc_by_nc_nd
Texto completo: Disponível Coleções: Preprints Base de dados: medRxiv Tipo de estudo: Estudo prognóstico Idioma: Inglês Ano de publicação: 2021 Tipo de documento: Preprint
Texto completo: Disponível Coleções: Preprints Base de dados: medRxiv Tipo de estudo: Estudo prognóstico Idioma: Inglês Ano de publicação: 2021 Tipo de documento: Preprint
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