Abstract
Wnt/β-catenin signaling dysregulation is involved in tumorigenesis. Furthermore, epigenetic modification of the Dickkopf (DKK) family (DKK1‑4) has been shown to be important in the regulation of Wnt signaling. However, the functions and mechanism of DKK2in the development and progression of prostate cancer remain unclear. Therefore, the present study investigated the role of DKK2in prostate cancer. The mRNA and protein expression levels of DKK2in prostate cancer tissues and cells were assessed by reverse transcription‑quantitative polymerase chain reaction and western blotting, respectively. The biological function of DKK2in prostate cancer was investigated using 3‑(4,5‑dimethylthiazol‑2‑yl)-2,5‑diphenyltetrazolium bromide and transwell invasion assays. DKK2was demonstrated to be upregulated in prostate cancer tissues and cells, and knockdown of DKK2suppressed cell proliferation and invasion. Furthermore, small interfering RNA targeting DKK2inhibited the expression of β‑catenin, cyclinD1and c‑Myc in prostate cancer cells. The present report suggested that DKK2downregulation suppressed the proliferation and invasion of prostate cancer cells by inhibiting the Wnt/β‑catenin signaling pathway.
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