본 연구는 MDA-MB-231 세포에서 resveratrol의 apoptosis 유발효과에 대해 알아보기 위해 연구되었다. Cell viability 결과 농도 유의적으로 감소하였으며, DAPI stain에서는 농도 의존적으로 chromatin condensation이 증가하는 것을 확인하였다. Resveratrol은 p53, cleaved-caspase-3, cleaved-caspase-9의 발현을 증가시켰지만, PI3K/Akt의 발현은 시간 의존적으로 감소시켰다. In vivo 실험에서는 resveratrol의 종양 억제 효과를 확인하였다. 50 mg/kg 투여한 군에서 종양의 크기가 대조군에 비해 감소하였으며, TUNEL assay를 통해 apoptosis cell을 관찰한 결과 50 mg/kg 투여한 군에서 많이 관찰되었다. 면역조직화학 염색을 통해 50 mg/kg 투여한군에서 p53, cytochrome-C, cleaved-caspase-3의 발현이 증가하는 것을 확인하였다. 본 연구의 결과를 종합하여 봤을 때 resveratrol이 MDA-MB-231 세포에 apoptosis를 유발하는데 효과가 있는 것으로 사료된다.
This study was conducted in order to investigate the effect of resveratrol on the induction of apoptosis in MDAMB-231 breast cancer cells. The result of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl terazolium bromide (MTT) assay shows that cell viability significantly decreased in a dose and time-dependent manner. 4",6-diamidino-2-phenylindole (DAPI) staining shows significantly increased chromatin condensation in a dose and time-dependent manner. Resveratrol increased the expression of p53, cleaved-caspase-3, and cleaved-caspase-9, whereas the expression of PI3K/Akt decreased in a timedependent manner. We investigated the in vivo tumor growth inhibitory effect of resveratrol. Tumor volume was significantly decreased in the 50 mg/kg resveratrol-administration group compared to the control group. In the 50 mg/kg treated group. Apoptosis cells were frequently observed by terminal deoxynucleotidyl transferase mediated dUTP nick end labeling (TUNEL) assay. Immunohistochemistry staining shows increased the expression of p53, cytochrome-C, and cleaved-caspase-3 in the 50 mg/kg treated group. These results indicate that resveratrol induced apoptosis through PI3K/Akt and p53 signal pathway in MDA-MB-231 cell.