Figure 4.
Effect of GB235 alone or in combination treatment with Trastuzumab in NCI-N87 cells. (A) Enhanced proliferation inhibition with combination treatment of GB235 and Trastuzumab was shown in NCI-N87 cells in the presence of heregulin-α. (B) Western blot analysis of HER3 and downstream signaling pathway activation upon GB235 (20 µg/mL) or Trastuzumab (20 µg/mL) alone, or the two antibodies in combination treatment followed by heregulin-α stimulation.