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A network-informed analysis of SARS-CoV-2 and hemophagocytic lymphohistiocytosis genes interactions points to Neutrophil extracellular traps as mediators of thrombosis in COVID-19 #MMPMID33684134
Ding J; Hostallero DE; El Khili MR; Fonseca GJ; Milette S; Noorah N; Guay-Belzile M; Spicer J; Daneshtalab N; Sirois M; Tremblay K; Emad A; Rousseau S
PLoS Comput Biol 2021[Mar]; 17 (3): e1008810 PMID33684134show ga
Abnormal coagulation and an increased risk of thrombosis are features of severe COVID-19, with parallels proposed with hemophagocytic lymphohistiocytosis (HLH), a life-threating condition associated with hyperinflammation. The presence of HLH was described in severely ill patients during the H1N1 influenza epidemic, presenting with pulmonary vascular thrombosis. We tested the hypothesis that genes causing primary HLH regulate pathways linking pulmonary thromboembolism to the presence of SARS-CoV-2 using novel network-informed computational algorithms. This approach led to the identification of Neutrophils Extracellular Traps (NETs) as plausible mediators of vascular thrombosis in severe COVID-19 in children and adults. Taken together, the network-informed analysis led us to propose the following model: the release of NETs in response to inflammatory signals acting in concert with SARS-CoV-2 damage the endothelium and direct platelet-activation promoting abnormal coagulation leading to serious complications of COVID-19. The underlying hypothesis is that genetic and/or environmental conditions that favor the release of NETs may predispose individuals to thrombotic complications of COVID-19 due to an increase risk of abnormal coagulation. This would be a common pathogenic mechanism in conditions including autoimmune/infectious diseases, hematologic and metabolic disorders.