Abstract
Purpose
Previous studies of the cell cycle progression (CCP) score in surgical specimens of prostate cancer (PCa) in patients treated by radical prostatectomy (RP) demonstrated significant association with time to biochemical recurrence (BCR). In this study, we compared the ability of the CCP score and the expression of PTEN or Ki-67 to predict BCR in a cohort of patients treated by RP. Finally, we constructed the best predictive model for BCR, incorporating biomarkers and relevant clinical variables.
Materials and methods
The study population consisted of 652 PCa patients enrolled in a retrospective cohort and who had RP surgery in French urological centers from 2000 to 2007.
Results
Among the 652 patients with CCP scores and complete clinical data, BCR events occurred in 41%, and the median time from surgery to the last follow-up among BCR-free patients was 72 months. In univariate Cox analysis, the continuous CCP score and positive Ki-67 predicted recurrence with a HR of 1.44 (95% CI 1.17–1.75; p = 5.3 × 10−4) and 1.89 (95% CI 1.38–2.57; p = 1.6 × 10−4), respectively. In contrast, PTEN expression was not associated with BCR risk. Of the three biomarkers, only the CCP score remained significantly associated in a multivariable Cox model (p = 0.026). The best model incorporated CAPRA-S and CCP scores as predictors, with HRs of 1.32 and 1.24, respectively.
Conclusion
The CCP score was superior to the two IHC markers (PTEN and Ki-67) for predicting outcome in PCa after RP.
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PL: Manuscript Writing, data collection, data analysis, GC-T: Manuscript Writing, data collection, data analysis, SD: data collection, MA: data collection, JV: data collection, EC: data collection, XC: data collection, FR: data collection, CV: data collection, SS: data collection, JR: data analysis, ZS: data analysis, PK: Manuscript Writing, data analysis, MR: data collection, GF-H: data collection, OC: Manuscript Writing, Project development, data collection, data analysis.
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Study was conducted with financial support from Myriad Genetics SAS. O Cussenot is a consultant by Myriad Genetics SAS. J Reid, Z Sangale, and P Korman are employed by Myriad Genetics SAS. The other authors declare that they have no conflict of interest.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the Helsinki Declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
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Informed consent was obtained from all individual participants included in the study.
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Léon, P., Cancel-Tassin, G., Drouin, S. et al. Comparison of cell cycle progression score with two immunohistochemical markers (PTEN and Ki-67) for predicting outcome in prostate cancer after radical prostatectomy. World J Urol 36, 1495–1500 (2018). https://doi.org/10.1007/s00345-018-2290-y
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DOI: https://doi.org/10.1007/s00345-018-2290-y