1. The Mutational Landscape of Metastatic Castration-sensitive Prostate Cancer: The Spectrum Theory Revisited
- Author
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Deek, MP, Van der Eecken, K, Phillips, R, Parikh, NR, Velho, PI, Lotan, TL, Kishan, AU, Maurer, T, Boutros, PC, Hovens, C, Abramowtiz, M, Pollack, A, Desai, N, Stish, B, Feng, FY, Eisenberger, M, Carducci, M, Pienta, KJ, Markowski, M, Paller, CJ, Antonarakis, ES, Berlin, A, Ost, P, Tran, PT, Deek, MP, Van der Eecken, K, Phillips, R, Parikh, NR, Velho, PI, Lotan, TL, Kishan, AU, Maurer, T, Boutros, PC, Hovens, C, Abramowtiz, M, Pollack, A, Desai, N, Stish, B, Feng, FY, Eisenberger, M, Carducci, M, Pienta, KJ, Markowski, M, Paller, CJ, Antonarakis, ES, Berlin, A, Ost, P, and Tran, PT
- Abstract
BACKGROUND: Emerging data suggest that metastasis is a spectrum of disease burden rather than a binary state, and local therapies, such as radiation, might improve outcomes in oligometastasis. However, current definitions of oligometastasis are solely numerical. OBJECTIVE: To characterize the somatic mutational landscape across the disease spectrum of metastatic castration-sensitive prostate cancer (mCSPC) to elucidate a biological definition of oligometastatic CSPC. DESIGN, SETTING, AND PARTICIPANTS: This was a retrospective study of men with mCSPC who underwent clinical-grade sequencing of their tumors (269 primary tumor, 25 metastatic sites). Patients were classified as having biochemically recurrent (ie, micrometastatic), metachronous oligometastatic (≤5 lesions), metachronous polymetastatic (>5 lesions), or de novo metastatic (metastasis at diagnosis) disease. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: We measured the frequency of driver mutations across metastatic classifications and the genomic associations with radiographic progression-free survival (rPFS) and time to castrate-resistant prostate cancer (CRPC). RESULTS AND LIMITATIONS: The frequency of driver mutations in TP53 (p = 0.01), WNT (p = 0.08), and cell cycle (p = 0.04) genes increased across the mCSPC spectrum. TP53 mutation was associated with shorter rPFS (26.7 vs 48.6 mo; p = 0.002), and time to CRPC (95.6 vs 155.8 mo; p = 0.02) in men with oligometastasis, and identified men with polymetastasis with better rPFS (TP53 wild-type, 42.7 mo; TP53 mutated, 18.5 mo; p = 0.01). Mutations in TP53 (incidence rate ratio [IRR] 1.45; p = 0.004) and DNA double-strand break repair (IRR 1.61; p < 0.001) were associated with a higher number of metastases. Mutations in TP53 were also independently associated with shorter rPFS (hazard ratio [HR] 1.59; p = 0.03) and the development of CRPC (HR 1.71; p = 0.01) on multivariable analysis. This study was limited by its retrospective nature, sample size
- Published
- 2021