Figure 9

Antiproliferative effect of PC-PLC inhibition on HER2-overexpressing cells. MTT assays on (a) SKBr3 and (b) BT-474 cells both exposed to trastuzumab (HERC, 10 μg/mL), or (c) MDA-MB-453 exposed to trastuzumab (50 μg/mL), after incubation for the indicated times with D609, trastuzumab (HERC), or their combination (COMB). The percentage of cell proliferation was calculated by defining the absorption of untreated cells as 100%. Histograms represent the mean percentage of independent series of assays (± SD for SKBr3 and BT-474 (n = 3); or ± maximum deviation for MDA-MB-453 (n = 2)). Significance of differences: **P ≤ 0.02; ***P < 0.005.