Targeting XBP1-mediated β-catenin expression associated with bladder cancer with newly synthetic Oridonin analogues

Wei Chen, Jiancheng Zhou, Kaijie Wu, Jun Huang, Ye Ding, Eun Jin Yun, Bin Wang, Chunyong Ding, Elizabeth Hernandez, John Santoyo, Haiying Chen, Ho Lin, Arthur Sagalowsky, Dalin He, Jia Zhou, Jer Tsong Hsieh

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Conventional chemotherapy is commonly used for advanced stages of transitional cell carcinoma (TCC) with modest success and high morbidity; however, TCC eventually develops resistance. Muscle invasive bladder cancer (MIBC) is recognized as a lethal disease due to its poor response to traditional chemotherapy. Numerous studies have implicated β-catenin, a critical effector in Wnt-mediated pathway associated with epithelial-mesenchymal transition and cancer stem cell, is involved in TCC progression, and furthermore closely associated with chemo-resistance. In this study, we discovered a novel natural product analogue CYD 6-17 that has a potent inhibitory effect on TCC cells exhibiting drug resistance to various chemotherapeutics, with an IC50 at nM range. Delivery of CYD 6-17 significantly inhibited the tumor growth using xenograft model but without detectable side effects. Mechanistically, it targeted β-catenin gene transcription by decreasing the binding of XBP1 to the promoter region, which appeared to be a new regulatory mechanism for β-catenin gene expression. Clinically, XBP1 expression correlated with the poor overall survival of patients. Overall, this study unveils unique mechanism of β-catenin gene regulation in advanced TCC and also offers a potential rational therapeutic regimen to MIBC.

Original languageEnglish (US)
Pages (from-to)56842-56854
Number of pages13
JournalOncotarget
Volume7
Issue number35
DOIs
StatePublished - 2016

Keywords

  • Oridonin
  • Transitional cell carcinoma
  • Wnt pathway
  • XBP1
  • β-catenin

ASJC Scopus subject areas

  • Oncology

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  • Cite this

    Chen, W., Zhou, J., Wu, K., Huang, J., Ding, Y., Yun, E. J., Wang, B., Ding, C., Hernandez, E., Santoyo, J., Chen, H., Lin, H., Sagalowsky, A., He, D., Zhou, J., & Hsieh, J. T. (2016). Targeting XBP1-mediated β-catenin expression associated with bladder cancer with newly synthetic Oridonin analogues. Oncotarget, 7(35), 56842-56854. https://doi.org/10.18632/oncotarget.10863