[Effects of sodium valproate on proliferation and apoptosis of Hep-2 cells and associated mechanism].

Objective: To observe the effect of sodium valproate (VPA) on proliferation and apoptosis of human laryngeal carcinoma Hep-2 cells and its associated mechanism.

Method: Methabenzthiazuron (MTT) was used to observe the proliferation of human laryngeal carcinoma Hep-2 cells treated with various concentrations of VPA at different times. Flow cytometry(FCM) and RT-PCR were used to measure the apoptosis rate and the expression of Survivin mRNA in the Hep-2 cells treated with VPA at 3 mmol/L for different times.

Result: VPA inhibited growth of Hep-2 cells in a dose-dependent and time-dependent manner (P < 0.01). The apoptosis rate increased after the treatment by VPA at 3 mmol/L. There were significant differences between different time groups (P < 0.01). The expression of Survivin mRNA of Hep-2 cells were decreased in a time dependent manner (3 mmol/L) (P < 0.01).

Conclusion: VPA have obvious growth inhibition and induction of apoptosis on human laryngeal cancer Hep-2 cells, its mechanism is related to decrease the expression of Survivin.