[Inhibitory effect of 3-bromopyruvate on the proliferation, migration and invasive ability of prostate cancer PC-3 cells].

Objective: To observe the effects of the glycolysis inhibitor 3-bromopyruvate (3-BrPA) on the proliferation, migration and invasive ability of prostate cancer PC-3 cells in vitro and explore the underlying mechanisms.

Methods: We cultured prostate cancer PC-3 cells in vitro and treated them with 3-BrPA at different concentrations for 24, 48 and 72 hours. Then we observed the morphological changes of the PC-3 cells under the inverted microscope. We also detected the effects of different concentrations of 3-BrPA on the proliferation, migration and invasive ability of the cells by MTT, wound-scratch and Transwell assays and determined the protein expressions of glucose transporter-1 (GLUT1), matrix metalloproteinase-14 (MMP-14), MMP-9 and MMP-2 in the PC-3 cells by Western blot.

Results: More significant changes were observed in the morphology of the PC-3 cells with increased concentrations of 3-BrPA. MTT assay showed that the inhibition rate of the proliferation of the PC-3 cells was remarkably increased in a concentration- and time-dependent manner (P<0.01). Wound-scratch and Transwell assays exhibited significant decreases in the scratch healing rate and number of invasive cells after 24 hours of intervention with 3-BrPA at 25, 50 and 100 μmol/L, even more significant after treated for 48 hours at the concentrations of 50 and 100 μmol/L (P<0.01). The expressions of the GLUT1, MMP-14, MMP-9 and MMP-2 proteins were markedly down-regulated after 3-BrPA intervention in comparison with those in the control group (P<0.01).

Conclusions: The glycolysis inhibitor 3-BrPA reduces the proliferation, migration and invasive ability of prostate cancer PC-3 cells by down-regulating the expressions of the related proteins GLUT1, MMP-14, MMP-9 and MMP-2.