Affiliation:
1. Department of Medical Oncology, Erasmus MC Cancer Institute University Medical Center Rotterdam The Netherlands
2. Department of Internal Medicine Franciscus Gasthuis & Vlietland Rotterdam/Schiedam The Netherlands
3. Department of Medical Oncology Maasstad Hospital Rotterdam The Netherlands
4. Department of Medical Oncology Haaglanden Medical Centre The Hague The Netherlands
Abstract
Multiple prognostic biomarkers, including circulating tumour cell (CTC) counts, exist in metastatic castration‐resistant prostate cancer (mCRPC) patients, but none of them have been implemented into daily clinical care. The modified fast aneuploidy screening test‐sequencing system (mFast‐SeqS), which yields a genome‐wide aneuploidy score, is able to reflect the fraction of cell‐free tumour DNA (ctDNA) within cell‐free DNA (cfDNA) and may be a promising biomarker in mCRPC. In this study, we investigated the prognostic value of dichotomized aneuploidy scores (< 5 vs. ≥ 5) as well as CTC counts (< 5 vs. ≥ 5) in 131 mCRPC patients prior to treatment with cabazitaxel. We validated our findings in an independent cohort of 50 similarly treated mCRPC patients. We observed that, similar to the dichotomized CTC count [HR: 2.92; 95% confidence interval (CI);1.84–4.62], dichotomized aneuploidy scores (HR: 3.24; CI: 2.12–4.94) significantly correlated with overall survival in mCRPC patients. We conclude that a dichotomized aneuploidy score from cfDNA is a prognostic marker for survival in mCRPC patients within our discovery cohort and in an independent mCRPC validation cohort. Therefore, this easy and robust minimally‐invasive assay can be readily implemented as a prognostic marker in mCRPC. A dichotomized aneuploidy score might also be used as a stratification factor in clinical studies to account for tumour load.
Subject
Cancer Research,Genetics,Molecular Medicine,General Medicine,Oncology
Cited by
1 articles.
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