Figure 3.
YM-254890 inhibits human UVM cell signaling and tumor growth. (A) IP1 accumulation assay in UVM cells and A375 cells (cutaneous BRAFV600E). Cells were treated with increasing concentrations of YM for 3 hours (left) and 24 hours (right). Data are expressed as IP1 concentration (nM) (mean ± SEM, n = 3) (B) Western blot analysis of indicated proteins in UVM cells and A375 cells treated with 500nM YM at 0, 2, 4, 8, and 24 hours. (C) Dose response of UVM and A375 cells treated with YM for 5 days at increasing dose and readout by CellTiter Glo 2.0. Data are expressed as the percentage RLU relative to that observed with vehicle. (mean ± SEM, n = 3). (D) Percent photon flux of OMM1.3 xenografts treated with vehicle or YM (2.5mg/kg) for 21 days (mean ± SEM, n = 10). Cells were transduced with pBMN for luciferase expression. Arrow indicates start of treatment at day 3. P < 0.05; *, P < 0.0005; ***, P < 0.0001, ****.