English: GBM cells merge with brain pericytes on laminin-coated silicone substrates. Magnification of a detail from Video 4, showing the step-by-step sequence of a merging between a tumor cell and a pericyte. The FR dextran+-cytoplasm from a U87 cell (white arrowheads) is progressively transferred (yellow arrowheads) into an adjacent unlabeled pericyte (white arrows). Asterisks indicate the merging cell product, which then migrates away. Δtime: 10 minutes; time: 1 hour 40 min; rate: 1 fps.