Evaluation of LGM2605 inhibition of intercellular cell adhesion molecule-1 (ICAM-1) expression in in vitro lung vascular networks (flow-adapted endothelial cells) exposed to gamma radiation. FAECs were exposed to 0 Gy, 0.25 Gy, 0.5 Gy, or 1 Gy gamma radiation and treated with 0 µM or 100 µM LGM2605 30 min following radiation exposure. Cells were harvested 24 h post radiation exposure and evaluated for ICAM-1 expression. Fluorescent images of FAECs exposed to LGM2605 (0 µM or 100 µM) 30 min following radiation exposure and harvested at 24 h radiation exposure and incubated with anti-ICAM-1 antibody (ThermoFisher Scientific, Waltham, MA, USA). Scale bar = 20 μm (A); graphed representation of the data imaged for each condition (B). Data are presented as mean ± SEM. # shown in figures indicate significant differences from FAECs exposed to 0 Gy gamma radiation and treated with 0 µM LGM2605 (## p < 0.01; #### p < 0.0001). Asterisks shown in figures indicate significant differences from FAECs exposed to 0.25 Gy, 0.5 Gy, or 1 Gy gamma radiation and treated with 0 µM LGM2605, respectively (** p < 0.01; **** p < 0.0001).