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. 2019 Jul 16;9:10290. doi: 10.1038/s41598-019-46700-z

Figure 3.

Figure 3

ABCB1 inhibition reduces migration and invasion in ependymoma cell lines. The ability of BXD1425EPN (a,c,d) and DKFZ-EP1 (b & Fig. S5) cells to migrate and invade was measured in wound healing (a,b) and spheroid invasion (c,d) assays respectively. The time required for 50% wound closure (t1/2) was significantly increased when both the BXD-1425EPN (a) and DKFZ-EP1 (b) cell lines were treated with either the non-specific ABCB1 inhibitor, verapamil (20 µM) or the specific ABCB1 inhibitor, vardenafil (10 µM). (c) A 3D spheroid invasion assay was performed to assess the ability of ependymoma cells to digest and invade through extracellular matrix (Cultrex BME). The spheroids formed from BXD-1425EPN cell line formed invadopodia and demonstrated multicellular streaming, which was visibly reduced after 96 hours in the presence of either ABCB1 inhibitor. (d) There was a significant reduction in the relative spheroid outgrowth R (ratio of the area of the invasive edge [dotted line] to the area of the area of spheroid itself) when treated with either ABCB1 inhibitor, which became more pronounced at 96 hours. Scale bars represent 100 µm. ***p ≤ 0.005, ****p ≤ 0.001.