RESUMO
OBJECTIVE@#To study synergistic effect of Vitamin C (VitC) combined with arsenic trioxide (As2 O3)-on human laryngocarcinoma Hep-2 cell line apoptosis.@*METHOD@#Human laryngocarcinoma cell line Hep-2 was cultured in vitro, and incubated with As2 O3 or jointly with VitC. The inhibition ability of Hep-2 cells was determined by methyl thiazolyl tetrazolium (MTT) assay, while the apoptosis was mensurated by the flow cytometry with Annexin-V/PI.@*RESULT@#Compared with the use of As2 O3 separately, the combination of As2 O3 and VitC could increase the inhibition ability and the apoptosis rate of Hep-2 cells markedly (P < 0.05).@*CONCLUSION@#Combination of As2 O3 with VitC could markedly increase arsenic trioxide (As2 O3)-induced apoptosis of Hep-2 cells.