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Prognostic value of a cell cycle progression signature for prostate cancer death in a conservatively managed needle biopsy cohort

J. Cuzick,D. Berney,G. Fisher,D. Mesher,H. Møller,J. Reid,M. Perry,Jimmy Park,Adib Younus,A. Gutin,C. Foster,P. Scardino,J. Lanchbury,S. Stone

Published 2012 in British Journal of Cancer

ABSTRACT

Background:The natural history of prostate cancer is highly variable and it is difficult to predict. We showed previously that a cell cycle progression (CCP) score was a robust predictor of outcome in a conservatively managed cohort diagnosed by transurethral resection of the prostate. A greater need is to predict outcome in patients diagnosed by needle biopsy.Methods:Total RNA was extracted from paraffin specimens. A CCP score was calculated from expression levels of 31 genes. Clinical variables consisted of centrally re-reviewed Gleason score, baseline prostate-specific antigen level, age, clinical stage, and extent of disease. The primary endpoint was death from prostate cancer.Results:In univariate analysis (n=349), the hazard ratio (HR) for death from prostate cancer was 2.02 (95% CI (1.62, 2.53), P<10−9) for a one-unit increase in CCP score. The CCP score was only weakly correlated with standard prognostic factors and in a multivariate analysis, CCP score dominated (HR for one-unit increase=1.65, 95% CI (1.31, 2.09), P=3 × 10−5), with Gleason score (P=5 × 10−4) and prostate-specific antigen (PSA) (P=0.017) providing significant additional contributions.Conclusion:For conservatively managed patients, the CCP score is the strongest independent predictor of cancer death outcome yet described and may prove valuable in managing clinically localised prostate cancer.

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