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[Experimental study of sensitivity to chemotherapeutic agents for human endometrial carcinoma cell line].

OBJECTIVE
To screen the sensitive chemotherapeutic agents to human endometrial carcinoma cell line-1 (HECCL-1) and study its mechanism.


METHODS
MTT method was used to examine the relative inhibition ratios (RIRs) of various concentrations of 18 chemotherapeutic agents to HECCL-1. Cell cycle, apoptosis and expression of MDR1 protein were detected by FCM.


RESULTS
Nine of the chemotherapeutic agents studied obviously inhibited the proliferative activity of HECCL-1 in a dose-dependent manner. The order of sensitivity was as follows: adriamycin (ADM), oxaliplatin (L-OHP), carboplatin (CBP), cisplatin (DDP), taxol (TAL), epirubicin (EPI), mitoxantrone (MIT), dactomycin (ACTD) and 5-fluorouracil (5-Fu). FCM showed these agents could significantly reduce the proportion of cells in G0-G1 phase, and increase the proportion of cells in S and G2-M phase (P < 0.05). Cell apoptosis was observed in 11 chemotherapeutic agents at their peak concentration. MDR expression was induced after using EPI, 5-Fu, hydroxycamptothecin (HCPT) and MIT.


CONCLUSION
HECCL-1 is sensitive to a number of the chemotherapeutic agents studied. Induced apoptosis may be the major mechanism of drug sensitivity, and acquired drug-resistance may be the critical reason against continued administration.