Figure 5: HL inhibited filopodia formation of A549 cells. A549 cells were treated with 200 μM HL for 3 hours. As positive control, A549 cells were incubated in the serum-starved (non-FBS) medium for 24 hours. Then, the cells were stained with rhodamine phalloidine and observed by TIRF microscope. Scale bars: 100 μm; allows indicate the filopodia formation of A549 cells.