Fig. 5

Role of C5a-C5aR1 axis in monocyte mediated extracellular trap formation. Monocyte extracellular trap formation was observed by fluorescence double staining with myeloperoxidase (green) and citrulline histone 3 (red) of THP-1 cells as markers after exposure to CM from spike expressing cells incubated with or without C5a inhibitor PMX205 and ROS inhibitor YCG063 for five days. Exogenous addition of C5a in cultures used as positive controls are shown on the right. Scale bars are 10 micrometers