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SARS-CoV-2 infection of human lung epithelial cells induces TMPRSS-mediated acute fibrin deposition

Nat Commun. 2023-10; 
Rachel Erickson, Chang Huang, Cameron Allen, Joanna Ireland, Gwynne Roth, Zhongcheng Zou, Jinghua Lu, Bernard A P Lafont, Nicole L Garza, Beniah Brumbaugh, Ming Zhao, Motoshi Suzuki, Lisa Olano, Joseph Brzostowski, Elizabeth R Fischer, Homer L Twigg, Reed F Johnson, Peter D Sun
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Gene Synthesis … Plasmid encoding ST14 (OHu19145C) or TMPRSS11D (OHu04628C) were synthesized in pcDNA3.1 vector with eGFP attached to N-terminus of the genes (GenScript). Cells were … Get A Quote


Severe COVID-associated lung injury is a major confounding factor of hospitalizations and death with no effective treatments. Here, we describe a non-classical fibrin clotting mechanism mediated by SARS-CoV-2 infected primary lung but not other susceptible epithelial cells. This infection-induced fibrin formation is observed in all variants of SARS-CoV-2 infections, and requires thrombin but is independent of tissue factor and other classical plasma coagulation factors. While prothrombin and fibrinogen levels are elevated in acute COVID BALF samples, fibrin clotting occurs only with the presence of viral infected but not uninfected lung epithelial cells. We suggest a viral-induced coagulation mechanism, in whic... More