Curcumin may act as a chemosensitizer in multi-drug resistant cancer. - GreenMedInfo Summary
[Studies on reversing MDR of K562/A02 by ramification of curcumin hydrolyzed].
Zhongguo Zhong Yao Za Zhi. 2010 Sep;35(18):2460-3. PMID: 21141501
Life Science Institute, Zhejiang Chinese Medical University, Hangzhou 310053, China. email@example.com
OBJECTIVE: To determine the reversal effects of ramification of curcumin hydrolyzed on multidrug-resistant cell line K562/A02, and explore its reversal mechanism.
METHOD: After treatment with ramification of curcumin hydrolyzed, the sensitivity of K562/A02 cells to usuall chemotherapeutic drugs were determined by MTT. The expression of P-gp in K562/A02 and K562 cells was detected by immunohistochemical method. Intracellular mean fluorescence intensity (MFI) of DNR in K562 and K562/A02 cells was detected by Flow Cytometry.
RESULT: After treatment with the ramification of curcumin, hydrolyzed (2.5 mg x L(-1)) IC50, of usuall chemotherapeutic drugs to K562/A02 decreased. The sensitivity of K562/A02 cells increased. The expression of the P-gp in K562/A02 cells decreased (P<0.05); MFI of the DNR in K562/A02 cells more significantly increased (P<0.05). The expression of mdrl-mRNA decreased.
CONCLUSION: The ramification of curcumin hydrolyzed have effects on the reversal multidrug-resistant of K562/A02 cells in vitro. It could enhance the sensitivity of K562/A02 cells to chemotherapeutic drugs and the mechanism might be associated with inhibiting P-gp-mediated drug efflux and increasing of intracellular concentration of chemotherapeutic drugs.