GE inhibited proliferation of EJ cells through blocking cell cycle progression at G2/M-phase.

EJ cells were incubated in culture medium with or without GE for 24 h. Cell viability and cell proliferation was measured by both MTT (A) and viable cell counting assays (B). Results are represented as mean ± SE from three different triplicate experiments. (C) The morphology of EJ cells under different concentrations of GE. Cellular images were photographed by a phase contrast microscopy. (D-H) GE induced cell-cycle arrest at G2/M-phase in EJ cells. Cell cycle distribution of EJ cells treated with different concentrations of GE was determined by flow cytometry. (H) Percentage of cells in each cell-cycle phase induced by GE. Results in bar graphs are represented as mean ± SE from three different triplicate experiments. *P<0.05 compared with the control.