TPX2 inhibition suppresses proliferation of colon cancer cells in vitro and in vivo. (A) HCT116 (left) and SW620 (right) cells were treated with shRNA-TPX2 or control shRNA (control) or Oligofectamine alone (mock) for 48 h, following which cells were harvested for analysis of TPX2 expression by western blot. (B) HCT116 (left) and SW620 (right) cells growth curve measured by a 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay. Each point indicates the mean of the spectrometric absorbance ± S.D. of three independent experiments (P < 0.001). SW620 cells with shRNA-TPX2, shRNA (control) or Mock were injected subcutaneously into the right scapular region of nude mice. Gross tumors in the mice are shown (C); tumors were measured (D) and weighted (E), (F) Representative Photographs of Ki67 staining in paraffin sections from tumors injected with shRNA-TPX2, or control cells (magnification: 100X).