| First Author | Yu X | Year | 2011 |
| Journal | Oncogene | Volume | 30 |
| Issue | 16 | Pages | 1868-79 |
| PubMed ID | 21151173 | Mgi Jnum | J:173730 |
| Mgi Id | MGI:5050059 | Doi | 10.1038/onc.2010.560 |
| Citation | Yu X, et al. (2011) Wnt/beta-catenin activation promotes prostate tumor progression in a mouse model. Oncogene 30(16):1868-79 |
| abstractText | Our previous studies have found that activation of Wnt/beta-catenin signaling resulted in mouse prostatic intraepithelial neoplasia (mPIN). In the large probasin promoter directed SV40-large T-antigen (LPB-Tag) expressing mouse prostate, mPIN forms with rare areas of adenocarcinoma. Combining expression of both Wnt-signaling and Tag expression in the mouse prostate, we have studied the role of Wnt/beta-catenin signaling in the progression from mPIN to adenocarcinoma. Our results show that the prostates of mice expressing Tag alone or nuclear beta-catenin alone developed mPIN, whereas the activation of both Tag and the Wnt/beta-catenin pathway resulted in invasive prostate adenocarcinoma. Furthermore, Foxa2, a forkhead transcription factor, was induced by active Wnt/beta-catenin signaling, and the expression of Foxa2 was associated with the invasive phenotype in the primary prostate cancer. In the LPB-Tag/dominant active (DA) beta-catenin prostates, MMP7, a Wnt/beta-catenin target gene, was upregulated. Furthermore, we also assessed AR and AR signaling pathway in these LPB-Tag/DA beta-catenin mice. Although beta-catenin is a well-known AR co-activator in vitro, our study provides strong in vivo evidences indicating that both AR protein and the AR pathway were downregulated in the prostate of LPB-Tag/DA beta-catenin mice. Histological analysis shows that prostate sections derived from the LPB-Tag/DA beta-catenin mice display neuroendocrine differentiation (NED), but NE cancer does not develop. Together, our findings indicate that Wnt/beta-catenin signaling has an important role in the progression of mPIN to prostate adenocarcinoma. |
