a,b, Casp11−/− iBMDMs were stimulated with FITC-LPS-EVs unlabeled (a) or labeled with CellBrite Steady 550 dye (b). After 4 h, cells were stained with anti-CD14, anti-EEA1, and anti-FITC antibodies and subjected to confocal imaging. In (b), light blue arrows indicate colocalization of FITC-LPS-EVs (CellBrite-labeled) with CD14 (top two rows) and their internalization (bottom two rows). Images are representative of two experiments. Scale bar, 5 µm (a,b).