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Bcl-2 expression of NB4 cells following treatment with As2O3 solution or As2O3 nanoparticles for 48 h. NB4 cells were treated as follows: 1, Control; 2, As2O3 solution (1.5 µmol/l); 3, As2O3 nanoparticles (1.5 µmol/l); 4, As2O3 solution (3.0 µmol/l); 5, As2O3 nanoparticles (3.0 µmol/l). As2O3, arsenic trioxide; Bcl-2, B-cell lymphoma 2.
