β-Elemene enhances susceptibility to cisplatin in resistant ovarian carcinoma cells via downregulation of ERCC-1 and XIAP and inactivation of JNK
| Autor: | Huasheng Liang, Rebecca X. Lee, Quentin Li, Gangduo Wang, Eddie Reed, Yuhua Zhong, Jueli M. Li |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Cancer Research
DNA repair Down-Regulation X-Linked Inhibitor of Apoptosis Protein Biology Inhibitor of apoptosis c-Jun NH2-terminal kinase 03 medical and health sciences 0302 clinical medicine Ovarian carcinoma Cell Line Tumor medicine Humans 030304 developmental biology Cell Proliferation Cisplatin Ovarian Neoplasms 0303 health sciences Chinese medicine β-elemene Carcinoma JNK Mitogen-Activated Protein Kinases apoptosis Articles Cell cycle medicine.disease Endonucleases 3. Good health XIAP DNA-Binding Proteins Gene Expression Regulation Neoplastic ovarian cancer excision repair cross-complementation group-1 Oncology Drug Resistance Neoplasm 030220 oncology & carcinogenesis Cancer research Female cisplatin resistance Ovarian cancer Sesquiterpenes Nucleotide excision repair medicine.drug |
| Zdroj: | International Journal of Oncology |
| ISSN: | 1791-2423 |
| Popis: | β-Elemene is a promising new plant-derived drug with broad-spectrum anticancer activity. It also increases cisplatin cytotoxicity and enhances cisplatin sensitivity in resistant human carcinoma cells. However, little is known about the mechanism of its action. To explore the potential therapeutic application of β-elemene as a drug-resistance modulator, this study investigated the underlying mechanism of β-elemene activity in cisplatin-resistant ovarian cancer cells. β-Elemene enhanced cisplatin sensitivity to a much greater extent in chemoresistant A2780/CP70 and MCAS human ovarian carcinoma cells compared to the chemosensitive parental cell line A2780. The dose-modifying factors for cisplatin were between 35 and 60 for A2780/CP70 cells and between 1.6 and 2.5 for A2780 cells. In the cisplatin-resistant ovarian carcinoma cells, β-elemene abrogated cisplatin‑induced expression of excision repair cross-complementation group‑1 (ERCC-1), a marker gene in the nucleotide excision repair pathway that repairs cisplatin-caused DNA damage. In addition, β-elemene not only reduced the level of X-linked inhibitor of apoptosis protein (XIAP), but also downregulated cisplatin-mediated XIAP expression in chemoresistant cells. Furthermore, β-elemene blocked the cisplatin-stimulated increase in the level of phosphorylated c-Jun NH2-terminal kinase (JNK) in these cells. These novel findings suggest that the β-elemene enhancement of cisplatin sensitivity in human chemoresistant ovarian cancer cells is mediated at least in part through the impairment of DNA repair activity and the activation of apoptotic signaling pathways, thereby making resistant ovarian cancer cells susceptible to cisplatin-induced cell death. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|