Fig. 3From: Water-pipe smoking promotes epithelial–mesenchymal transition and invasion of human breast cancer cells via ERK1/ERK2 pathwaysEffect of WPS on cell invasion of human breast cancer cells. The results from matrigel invasion assay indicate that WPS enhances cell invasion ability of MCF7 and BT20 cell lines by approximately 35% in comparison with their control cells. The histograms show mean ± SD (P < 0.002 and 0.001, respectively; t-test was used and is considered significant with P < 0.05). The cancer cells were treated with 200 μg of WPS solution for 2 days as described in “Materials and methods” sectionBack to article page