Abstract
The anti-cancer activities of curcumin (CUR), a polyphenol derived from the plant Curcuma longa, has been extensively studied. In the present study, we found that CUR displayed anti-multidrug-resistant (MDR) activity in K562/A02 cells. A short-time treatment with CUR sufficiently and equally induced DNA damage, decreased cell viability, and triggered apoptosis in parent K562 and MDR K562/A02 cells. The short-time treatment with CUR also caused decrease of pro-caspase 3 in both cell lines and decrease of pro-caspase 9, increase of PARP cleavage and the ratio of Bax/Bcl-xL in MDR K562/A02 cells. Further experiment revealed that CUR was capable of down-regulating P-glycoprotein in MDR K562/A02 cells. Moreover, we observed that Cu2+ enhanced CUR-mediated apoptosis which was blocked by antioxidants N-acetyl-cysteine and catalase. In summary, the short-time treatment with CUR sufficiently induced DNA damage, decreased cell viability and triggered apoptosis in MDR K562/A02 cells and Cu2+ enhanced CUR-mediated apoptosis which due to reactive oxygen species generation.
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Abbreviations
- CAT:
-
Catalase
- CUR:
-
Curcumin
- DOX:
-
Doxorubicin
- MDR:
-
Multidrug-resistant
- MTT:
-
Tetrazolium bromide
- NAC:
-
N-acetyl-cysteine
- RF:
-
Resistance factor
- ROS:
-
Reactive oxygen species
- VP16:
-
Etoposide
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Acknowledgments
We extremely thank Ms. Si-Meng Chen, Mr. Guo-Sheng Wu, and Mr. Lin-Jiang Tong, for their technical help.
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Lu, JJ., Cai, YJ. & Ding, J. The short-time treatment with curcumin sufficiently decreases cell viability, induces apoptosis and copper enhances these effects in multidrug-resistant K562/A02 cells. Mol Cell Biochem 360, 253–260 (2012). https://doi.org/10.1007/s11010-011-1064-2
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DOI: https://doi.org/10.1007/s11010-011-1064-2