F: Cells were stained with CMFDA dye, suspended in a paraformaldehyde solution and submitted to centrifugation at 3,724 xg onto poly-lysine-coated coverslips. Confocal optical sections separated by 0.2 µm were acquired. X-Z images were built with ImageJ. The maximal sections in 'x' (width) and 'z' (thickness) were determined for each cell (upper panel). Plots represent the deformability index (x/z). Each dot corresponds to one cell. Horizontal bars represent the mean ± SEM. Mann-Whitney test. Images are representative of three experiments. 