Preprint Persistent Activation of Chronic Inflammatory Pathways in Long Covid, 2024, Aid et al.

Discussion in 'Long Covid research' started by SNT Gatchaman, May 14, 2024.

  1. SNT Gatchaman

    SNT Gatchaman Senior Member (Voting Rights)

    Aotearoa New Zealand
    Persistent Activation of Chronic Inflammatory Pathways in Long Covid
    Malika Aid; Katherine McMahan; Nicole Hachmann; Jessica Miller; Erica Borducchi; David Hope; Marjorie Rowe; Eleanor Schonberg; Siline Thai; Ai-ris Collier; Janet Mullington; Dan Barouch

    Long Covid, or Post-Acute Sequelae of COVID-19 (PASC), involves a spectrum of chronic symptoms following resolution of acute SARS-CoV-2 infection. Current hypotheses for the pathogenesis of Long Covid include persistent SARS-CoV-2, activation of other viruses, tissue damage, autoimmunity, endocrine insufficiency, immune dysfunction, and complement activation.

    We evaluated 142 participants, including uninfected controls (N=35), acutely infected individuals (N=54), convalescent controls (N=25), and Long Covid patients (N=28), by comprehensive immunologic, virologic, transcriptomic, and proteomic analyses.

    Long Covid was characterized by persistent inflammatory pathways compared with convalescent controls and uninfected controls, including upregulation of IL-6 and JAK-STAT pathways as well as activation of coagulation, complement, metabolism, and T cell exhaustion pathways. Moreover, robust activation of these pathways during acute COVID-19 infection correlated with the subsequent development of Long Covid. In an independent validation cohort (N=47), Long Covid patients had higher levels of plasma IL-6R compared with convalescent controls and uninfected controls.

    These data demonstrate that Long Covid is characterized by persistent activation of chronic inflammatory pathways, suggesting novel therapeutic targets and biomarkers of disease.

    Link | PDF (Preprint: BioRxiv) [Open Access]
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