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VM-26 inhibited the proliferation of Tca8113 cells in a dose-dependent way (cells were treated for 72 hours) according to the results of MTT assay. The inhibitory rates reached plateau when the dose of VM-26 increased to 1.5 mg/l. The IC50 of VM-26 was 0.35 mg/l. The figure was the representative of three independent experiments.
