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Oncol Lett. 2011 Jul;2(4):679-684. Epub 2011 May 13.

Three-gene signature predicts disease progression of non-muscle invasive bladder cancer.

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1
Department of Urology, College of Medicine, Chungbuk National University, Cheongju, Chungbuk.

Abstract

The clinical grades and staging methods currently employed for bladder cancer (BC) are inadequate for assessing treatment outcomes for non-muscle invasive bladder cancer (NMIBC). We have developed a clinically applicable quantitative real-time PCR (qPCR) gene signature to predict the progression of NMIBC. Three genes not previously described for BC were selected from our published progression-related gene classifier data set. Data were drawn from a previous study population and from new cases. Primary NMIBC tissue specimens (n=193) were analyzed by qPCR. Risk scores were then used to rank specimens into high- and low-risk signature groups based on their gene expression. The Kaplan-Meier method and a multivariate Cox regression model were used to identify the prognostic value of the three-gene signature for both recurrence and progression. The Kaplan-Meier estimates revealed significant differences in time-to-recurrence and progression between low- and high-risk signatures (log-rank test, p=0.011 and p<0.001, respectively). The multivariate Cox regression analysis showed that the three-gene risk signature is an independent predictor of bladder tumor progression (hazard ratio, 4.268; 95% CI, 1.542-11.814; p=0.005). In conclusion, our three-gene signature was found to be closely associated with progression among patients with NMIBC.

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