Effect of autophagy on the resveratrol-induced apoptosis of ovarian cancer SKOV3 cells.

Abstract

This study aims to evaluate the relationship between apoptosis and autophagy induced by resveratrol (Res) in SKOV3 human ovarian cancer cell lines. The experiment was divided into four groups: normal control group, Res group, Res combined with autophagy inhibitor 3-methyladenine (Res+3-MA) group, and Z-VAD-FMK group. SKOV3 cells were cultured and treated with Res and 3-MA for 24 hours. The processing concentration of Res was screened out by the Cell Counting Kit-8 (CCK8) assay. The cell survival rate was measured by the CCK8 assay. The expression of bule-associated protein light chain 3 beta 2 (LC3-II) and Beclin-1 was detected using Western blot analysis. The percentages of apoptotic and autophagic cells were analyzed using flow cytometry. The cell survival rate significantly decreased as Res concentration increased, and the differences were statistically significant (P < 0.05). The processing concentration of Res was 25 μmol/L. After treatment with Res for 24 hours, the expression levels of autophagy-related protein LC3 and Beclin-l were significantly higher than in the other groups. Furthermore, the expression of LC3 and Beclin-l significantly declined in the Res+3-MA group compared with the Res group. However, the percentage of autophagic cells significantly decreased from 37.0% ± 4.24% to 6.1% ± 0.28%, and the percentage of apoptotic cells significantly increased from 24% ± 4.55% to 67.0% ± 4.3%; and the differences were statistically significant ( P < 0.05). Res can induce autophagy to inhibit apoptosis in tumor SKOV3 cells, and inhibition of Res+3-MA could not only enhance the effects of chemotherapy but also prevent normal cells from tumorigenesis.