Jun 9, 2020Paper

Erythrocytes Reveal Complement Activation in Patients with COVID-19

MedRxiv : the Preprint Server for Health Sciences
Lk Metthew LamNilam S. Mangalmurti


COVID-19, the disease caused by the SARS-CoV-2 virus, can progress to multi-organ failure characterized by respiratory insufficiency, arrhythmias, thromboembolic complications and shock. The mortality of patients hospitalized with COVID-19 is unacceptably high and new strategies are urgently needed to rapidly identify and treat patients at risk for organ failure. Clinical epidemiologic studies demonstrate that vulnerability to organ failure is greatest after viral clearance from the upper airway, which suggests that dysregulation of the host immune response is a critical mediator of clinical deterioration and death. Autopsy and pre-clinical evidence implicate aberrant complement activation in endothelial injury and organ failure. A potential therapeutic strategy warranting investigation is to inhibit complement, with case reports of successful treatment of COVID-19 with inhibitors of complement. However, this approach requires careful balance between the host protective and potential injurious effects of complement activation, and biomarkers to identify the optimal timing and candidates for therapy are lacking. Here we report the presence of complement activation products on circulating erythrocytes from hospitalized COVID-19 p...Continue Reading


Jul 18, 2020·The Journal of Experimental Medicine·Carl Nathan
Jul 20, 2020·Annals of Hematology·Eleni GavriilakiAchilles Anagnostopoulos
Feb 3, 2021·Best Practice & Research. Clinical Rheumatology·Yu ZuoAlfred H J Kim
Apr 4, 2021·Medical Microbiology and Immunology·Qin Li, Zi Chen

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