期刊
ONCOLOGY LETTERS
卷 19, 期 1, 页码 291-300出版社
SPANDIDOS PUBL LTD
DOI: 10.3892/ol.2019.11103
关键词
beta-elemene; cisplatin; apoptosis; 5 ' AMP-activated protein kinase; bladder cancer
类别
资金
- National Natural Science Foundation of China [81874092, 81801482]
- Chongqing Science & Technology Commission [cstc2019jcyi-msxmX0126]
Cisplatin-based chemotherapy is the standard regimen for patients with bladder cancer, but its effectiveness is limited by high toxicity and the development of drug resistance. beta-elemene (beta-ELE), a compound extracted from Rhizoma zedoariae, has antitumor activity in various malignancies and exhibits low toxicity. However, the effects and specific mechanism of beta-ELE in bladder cancer remain unclear. The present study aimed to investigate the antitumor activity and possible mechanisms of beta-ELE alone and in combination with cisplatin in bladder cancer cells. Cell viability was determined using Cell Counting Kit-8. Cell cycle and reactive oxygen species (ROS) analyses were performed by flow cytometry. Apoptosis was detected by Hoechst 33258 and Annexin-V/propidium iodide staining. Mitochondrial membrane potential was determined by staining with a JC-1 probe, flow cytometry and fluorescence microscopy. Protein expression was detected by western blotting. The results revealed that beta-ELE significantly inhibited the proliferation of various bladder cancer cell lines and induced cell cycle arrest at G(0)/G(1)-phase in T24 and 5637 cells. Compared with cisplatin alone, co-treatment with beta-ELE increased cisplatin-mediated cytotoxicity against T24 cells, which resulted in the loss of mitochondrial membrane potential and release of cytochrome c into the cytoplasm. Co-treatment with beta-ELE and cisplatin enhanced ROS accumulation and activation of 5'AMP-activated protein kinase (AMPK), which induced apoptosis. The results of the present study suggested that beta-ELE inhibited the proliferation of bladder cancer cells in vitro and enhanced cisplatin-induced mitochondria-dependent apoptosis via the ROS-AMPK signaling pathway. Combination therapy with beta-ELE requires further investigation as a potential treatment of bladder cancer.
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