Effect of BBGC on sensitivity of U937 and UK711 cells to VP-16.

U937 (closed) and UK711 (open) cells were treated with 15 μmol/L of VP-16 combined with 0 (circle), 5 (squares), and 15 (triangles) μmol/L BBGC for the indicated periods. Cellular viability was determined by the MTS method. The means ± SD of triplicate cultures are shown.