Background : The Wnt/beta-catenin pathway is dysregulated in pancreatic cancer and is reported to be associated with poor prognosis, indicating the need for identification of novel agents to improve the efficacy of current therapy or have better activity. Therefore in the present study we explored the anticancer activity of PNU-74654 alone or in combination with gemcitabine in 2 and 3 dimensional cell culture model of pancreatic cancer. Methods: The MTT assay was applied to determine the viability of PC cancerous cells (PCC), while the cytotoxicity of this agent was evaluated in 3D cell culture model (spheroid). The effects of PNU-74654 was investigated in established cell migration/invasion assays. Result: The expression of candidate genes affecting the cell cycle, migration, and Wnt/b-catenin pathway was evaluated at mRNA and/or proteins by RT-PCR or Western blot. PNU-74654 inhibited the cell growth at IC50 of 122±0.4 umol/L, and had a synergistic effect on the antiproliferative properties of gemcitabine by modulating the Wnt pathway. The PNU-74654/gemcitabine combination reduced the migratory and invasiveness of PC cells, compared to control cells through perturbation of E-cadherin. Conclusion: In aggregate our findings demonstrated the profound antitumor properties of PNU-74654 in pancreatic cancer, supporting further studies to evaluate the therapeutic impact of this novel therapy to target Wnt pathway in the treatment of pancreatic cancer.
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