Abstract
Background:
The influence of the bisphosphonate zoledronic acid (ZA) on prostate cancer (PC) growth, adhesion and invasive behavior was investigated.
Methods:
PC-3, DU-145 and LNCaP cells were treated with ZA, and tumor-cell growth was then investigated by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Furthermore, tumor-cell adhesion to vascular endothelium or to immobilized extracellular matrix proteins, as well as migratory properties of the cells, was evaluated. Integrin β subtypes, integrin-dependent signaling, as well as cell-cycle regulating proteins, were analyzed by western blots.
Results:
ZA dose-dependently reduced tumor-cell growth but did not impair tumor–endothelium and tumor–matrix interaction. However, ZA significantly inhibited tumor migration and invasive activity. Cyclin E was reduced by ZA in LNCaP and DU-145, and p21 was elevated in LNCaP cells. p27 was upregulated in all tumor cell lines, compared with the controls. ZA elevated β1-integrin in PC-3 and diminished β4-integrin in PC-3 and DU-145 cells.
Conclusions:
ZA inhibits PC growth and motility but does not influence the mechanical contact between tumor cells and the vascular wall.
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The authors thank Karen Nelson for critically reading the manuscript.
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Mani, J., Vallo, S., Barth, K. et al. Zoledronic acid influences growth, migration and invasive activity of prostate cancer cells in vitro. Prostate Cancer Prostatic Dis 15, 250–255 (2012). https://doi.org/10.1038/pcan.2012.9
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DOI: https://doi.org/10.1038/pcan.2012.9
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