<p>After infection, SAOS-2 cells were treated with 10 µg/ml cisplatin for 24 h and subjected to Annexin V-PI Apoptosis analysis (A) and measurement of caspase-3 and caspase-9 activities (B). (C) Western blot analysis of p-AKT, AKT, BCL-2 and Bid protein. *: <i>P</i><0.01, compared to control cells. Con: non-infected, NC: non-silencing, KD: BMI-1 knock down, Rescue: BMI-1 wobble mutant, Annexin V<sup>−</sup>/PI<sup>−</sup>: viable cells, Annexin V<sup>+</sup>/PI<sup>−</sup>: cells in early apoptosis, Annexin V<sup>+</sup>/PI<sup>+</sup>: cells in late apoptosis, Annexin V<sup>−</sup>/PI<sup>+</sup>: cells in necrosis.</p