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OBJECTIVE To study the effects of daidzein on human pancreatic cancer cells in vitro. METHODS Human estrogen-receptor (ER)-positive pancreatic cancer cells MiaPaCa-2 and ER-negative pancreatic cancer cells PANC-1 were treated by 0.1 micromol/L, 1 micromol/L, 10 microL, 25 microL, 50 microL, 75 microL and 100 microL of daidzein, respectively. Its antiproliferative effect was studied by MTT assay. RESULTS Daidzein inhibited the growth of MiaPaCa-2 and PANC-1 cells at the concentrations from 0.1 microL to 100 microL. A dose- and time-dependent manner was found. The IC(50) of daidzein on MiaPaCa-2 and PANC-1 cells was 45 microL and 75 micro, respectively. After MiaPaCa-2 cells were treated by daidzein for 3 d and at the concentrations more than IC(50), the inhibitory manner was identical and the inhibition appeared a saturation phenomenon, but the inhibitory manner of daidzein on PANC-1 cells was different from that of MiaPaCa-2 cells. CONCLUSIONS Daidzein has antiproliferative effects on human estrogen-receptor-positive and negative pancreatic cancer cells, but their mechanisms may be different.
Jun-Ming Guo, and
Bing-Xiu Xiao, and
De-Jian Dai, and
Qiong Liu, and
Hong-Hui Ma
August 2015,
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