The effects of vitamin E succinate on the expression of c-jun gene and protein in human gastric cancer SGC-7901 cells

摘要

AIM: To investigate the effects of vitamin E succinate (VES) on the expression of c-jun gene and protein in human gastric cancer SGC-7901 cells.METHODS: After SGC-7901 cells were treated with VES at different doses (5, 10, 20 mg•L^-1) at different time, reverse transcription-PCR technique was used to detect the level of c-jun mRNA; Western Blot was applied to measure the expression of c-jun protein.RESULTS: After the cells were treated with VES at 20 mg•L^-1 for 3 h, the expression rapidly reached its maximum that was 3.5 times of UT control (P < 0.01). The level of c-jun mRNA was also increased following treatment of VES for 6 h. However, the expression after treatment of VES at 5 mg•L^-1 for 24 h was 1.6 times compared with UT control (P < 0.01). Western blot analysis showed that the level of c-jun protein was obviously elevated in VES-treated SGC-7901 cells at 20 mg•L^-1 for 3 h. The expression of c-jun protein was gradually increased after treatment of VES at 20 mg•L^-1 for 3, 6, 12 and 24 h, respectively, with an evident time-effect relationship.CONCLUSION: The levels of c-jun mRNA and protein in VES-treated SGC-7901 cells were increased in a dose- and time-dependent manner; the expression of c-jun was prolonged by VES, indicating that c-jun is involved in VES-induced apoptosis in SGC-7901 cells.