[Adriamycin enhances the sonodynamic effect of chlorin e6 against the proliferation of human breast cancer MDA-MB-231 cells in vitro].
OBJECTIVE
To evaluate the effect of adriamycin (ADM) in enhancing the sonodynamic effect of chlorin e6 against the proliferation of human breast cancer MDA-MB-231 cells in vitro.


METHODS
MDA-MB-231 cells were treated with ultrasound/Chlorin e6 alone or in combination with ADM, and the changes in the cell proliferation was determined by MTT assay.


RESULTS
Ultrasound (1.0 MHz) at the power intensity of 0.5-2.0 W/cm2 inhibited the proliferation of MDA-MB-231 cells in an intensity-dependent manner, and chlorin-e6 (0.05-1.6 mg/ml) and ADM (0.1-0.4 g/ml) alone both inhibited the proliferation of MDA-MB-231 cells dose-dependently. Compared with ultrasound (0.5 W/cm2, 1.0 MHz, 60 s) or chlorin-e6 (0.05-0.2 mg/ml) alone, a combined treatment with ultrasound and chlorin e6 significantly enhanced the inhibitory effect on the proliferation of MDA-MB-231 cells (P<0.05). ADM significantly enhanced the sonodynamic effect of chlorin e6 (0.1 mg/ml) against the cell proliferation of MDA-MB-231 cells (P<0.05), and the effect was schedule-dependent, which was greater when ADM was added after the sonodynamic treatment (P<0.05).


CONCLUSIONS
ADM can enhance the sonodynamic effect of chlorin e6 against the proliferation of MDA-MB-231 cells in vitro.
Department of Clinical Oncology, Guangzhou General Hospital of Guangzhou Command, Guangzhou 510010, China.
Hui-jie
HJ
Gao
Wei-min
WM
Zhang
Xiao-huai
XH
Wang
Rui-nian
RN
Zheng
D001943:Breast Neoplasms; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects*; D002735:Chlorophyllides; D004317:Doxorubicin / Q000494:pharmacology*; D005260:Female; D006801:Humans; D011166:Porphyrins / Q000627:therapeutic use*; D014464:Ultrasonic Therapy
D002735:Chlorophyllides; D011166:Porphyrins; C062985:phytochlorin; D004317:Doxorubicin