Cell cycle progression score and PTEN as prognostic factors for metastasis in intermediate- and high-risk prostate cancer overall, and in those who also received salvage radiotherapy.

Authors

Bruce Trock

Bruce J. Trock

James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, MD

Bruce J. Trock , Saradha Rajamani , Igor Vidal , Stephanie Glavaris , Tracy Jones , Misop Han , Alan W. Partin , Todd Cohen , Steven Stone , Angelo M De Marzo

Organizations

James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, MD, Myriad Genetics, Inc., Salt Lake City, UT, Johns Hopkins University School of Medicine, Baltimore, MD, The James Buchanan Brady Urological Institute, Baltimore, MD, The Johns Hopkins Hospital, Baltimore, MD, Johns Hopkins University, Baltimore, MD

Research Funding

Pharmaceutical/Biotech Company
Myriad Genetics, Inc.

Background: The cell cycle progression (CCP) score and PTEN have never been evaluated together as prognostic markers for risk of metastasis in a radical prostatectomy (RP) cohort of men with National Comprehensive Cancer Network intermediate- and high-risk prostate cancer (PCa), nor in such patients who also received salvage radiation (SRT) alone or with androgen deprivation (SRT+ADT). This study evaluated CCP score and PTEN in both settings. Methods: Participants were treated with RP at Johns Hopkins from 2007-2015. Paraffin-embedded RP tissue was analyzed blind to clinical outcome at Myriad Genetics, for CCP score using qRT-PCR, and PTEN by immunohistochemistry. For overall evaluation of CCP and PTEN in intermediate- and high-risk men a case-cohort sample was selected. Intermediate- and high-risk men with biochemical recurrence who received SRT or SRT+ADT were also sampled to provide a population at particularly high risk. Metastasis-free survival (MFS) was analyzed with the proportional hazards model, weighted for case-cohort design for the overall analysis, and adjusted for CAPRA-S. The clinical cell-cycle risk (CCR) score, a fixed algorithm combining CCP and CAPRA-S was also analyzed in both contexts. Data were analyzed independently by Johns Hopkins and Myriad Genetics. Results: The case-cohort consisted of 209 men, including 47% with Gleason score >4+3, 48% extra-prostatic extension, and 18% with seminal vesicle or lymph node involvement; 42 (20%) developed metastasis. In univariate analyses CCP, CAPRA-S, and PTEN were all highly significant. In multivariable analysis, only CCP and CAPRA-S retained significance (Table section A). CCR was also strongly prognostic, HR=7.9 (95% CI 4.4, 14.5) per unit change, p<0.00001. SRT (56%) or SRT+ADT (44%) were received by 172 men, of whom 78% had Gleason >4+3, 48% extra-prostatic extension, and 34% seminal vesicle or lymph node involvement; 19 (11%) developed metastases. Again, CCP and CAPRA-S, but not PTEN, were statistically significant (Table section B). CCR was also statistically significant, HR=1.7 (95% CI 1.2, 2.4), p=0.002. Conclusions: This is the first comparison, in a recent cohort of intermediate- and high-risk men, of CCP score and PTEN as risk factors for metastasis, and first evaluation in such men receiving SRT. In both multivariable settings, CCP score, but not PTEN, was significantly associated with MFS, adjusted for CAPRA-S. CCR, a fixed algorithm that combines CCP and CAPRA-S was also significant in both settings.

VariablesA. Overall intermediate- and high-risk (n=209)
B. Intermediate- and high-risk receiving SRT or SRT+ADT (n=172)
HR (95% CI)p-valueHR (95% CI)p-value
CCP (per unit)3.1 (1.6, 6.1)0.0011.7 (1.1, 2.6)0.017
CAPRA-S (per unit)2.2 (1.7, 2.9)<0.000011.3 (1.02, 1.5)0.032
PTEN (loss vs. intact)1.9 (0.6, 5.7)0.281.9 (0.7, 4.8)0.204

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Abstract Details

Meeting

2021 Genitourinary Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session: Prostate Cancer - Localized Disease

Track

Prostate Cancer - Localized

Sub Track

Translational Research

Citation

J Clin Oncol 39, 2021 (suppl 6; abstr 247)

DOI

10.1200/JCO.2021.39.6_suppl.247

Abstract #

247

Poster Bd #

Online Only

Abstract Disclosures

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