Rapamycin sensitizes T-ALL cells to GC treatment by enhancing apoptotic cell death. (A) T-ALL cells were incubated for 24~72 h (according to different time points to early stage of apoptosis) with rapamycin(10 nM) and/or Dex (1 μM), and the early stage of apoptosis were detected by Annexin V-FITC/PI staining. For all experiments, values of triple experiments were shown as mean plus or minus SD. * p < 0.05 as compared with control group or Dex group or Rap group (except for Jurkat cells at 48 h). (B) After 48 h exposure to rapamycin and/or Dex, Molt-4 cells were lysed and extracts were analyzed by Western blotting for GR expression.