Alsterpaullone inhibited HeLa cells in a time-dependent (0-72 h) and dose-dependent (0-30 μ M) manner.?In the presence of alsterpaullone, HeLa cells were arrested in G2/M prior to undergoing apoptosis via a mechanism that is involved in the regulation of various antiapoptotic genes, DNA-repair, transcription, and cell cycle progression.?Compared to controls, alsterpaullone effectively prevented HeLa cells from entering S-phase.?These potential therapeutic efficacies could be correlated with the activation of caspase-3[1].