[Effect of trichostatin alone and combination with imatinb on the proliferation and apoptosis of the K562R cells].

Objective: To explore the effect of trichostatin A (TSA) alone and combination with imatinib on the proliferation and apoptosis of K562R cells.
Methods: 3-(4,5-dimethylthiazol-2-yl) -5(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium(MTS) assay was used to observe the proliferation of K562R cells and apoptosis was analyzed by annexin-V/propidium iodide(PI) staining.
Results: After exposure to TSA, the proliferation of K562R cells was inhibited, and the effect was in both time- and dose-dependent manner. The apoptosis was induced. Combined with imatinib, the effect of proliferation inhibition was better.
Conclusion: TSA combined with imatinib can inhibit the proliferation of K562R cells and induce its apopotosis. TSA may become a new drug for imatinib-resistant patients.