Prognostic and functional significance of thromboxane synthase gene overexpression in invasive bladder cancer

Omar Moussa, John S. Yordy, Hassan Abol-Enein, Debajyoti Sinha, Nabil K. Bissada, Perry V. Halushka, Mohamed A. Ghoneim, Dennis K. Watson

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

Thromboxane synthase (TXAS) is one of the enzymes downstream from cyclooxygenase-2 and catalyzes the synthesis of thromboxane A2 (TXA2). TXAS was among the genes we identified based on its overexpression in invasive bladder tumors. TXAS is overexpressed in common forms of bladder tumors: 69 of 97 (71.1%) transitional cell carcinoma (TCC), 38 of 53 (71.6%) squamous cell carcinoma, and 5 of 11 (45.5%) adenocarcinoma relative to non tumor tissue. Overall, 112 of 161 (69.5%) invasive tumors exhibited elevated expression. Significantly, patients with tumors having >4-fold levels of TXAS expression showed significant statistical evidence of lower overall survival expressed by the estimated hazard ratio of 2.74 with P = 0.009 in Cox's regression analysis. TXAS mRNA expression was found to be an independent prognostic marker for patients with bladder cancer. Treatment of bladder cancer cell lines (T24 and TCC-SUP) with TXAS inhibitors and TXA 2 (TP) receptor antagonists reduced cell growth, migration, and invasion, whereas TP agonists stimulated cell migration and invasion. The positive correlation between elevated TXAS expression and shorter patient survival supports a potential role for TXAS-regulated pathways in tumor invasion and metastases and suggests that modulation of the TXAS pathway may offer a novel therapeutic approach.

Original languageEnglish (US)
Pages (from-to)11581-11587
Number of pages7
JournalCancer Research
Volume65
Issue number24
DOIs
StatePublished - Dec 15 2005

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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    Moussa, O., Yordy, J. S., Abol-Enein, H., Sinha, D., Bissada, N. K., Halushka, P. V., Ghoneim, M. A., & Watson, D. K. (2005). Prognostic and functional significance of thromboxane synthase gene overexpression in invasive bladder cancer. Cancer Research, 65(24), 11581-11587. https://doi.org/10.1158/0008-5472.CAN-05-1622