Abstract:
:Background: There is emerging evidence that radiographic progression-free survival (rPFS) is highly correlated with overall survival (OS), potentially serving as an indicator of treatment outcome for castration-resistant prostate cancer (CRPC). The objective of this study is to assess rPFS and prostate specific antigen (PSA) response in sequential treatment using androgen signaling inhibitors (ASIs) including abiraterone and enzalutamide in newly diagnosed CRPC. Methods: Propensity score matching was performed to reduce bias by confounding factors between first-line ASIs. The primary endpoints of the study included rPFS, time to PSA progression (TTPP), and PSA response. Results: A paired-matched group of 184 patients were identified. From the initiation of first-line ASIs, there was no significant difference in rPFS, TTPP, and PSA response between treatment arms. From the initiation of second-line ASIs, enzalutamide following abiraterone consistently exhibited longer rPFS (median: 7 and 15 months, p = 0.04), TTPP, and better PSA response compared to the reverse, whereas OS did not reach significance (median: 14 and 23 months, p = 0.35). Conclusion: Although the effect of ASIs as the first line was similar, the extent of cross-resistance might differ towards less resistance in enzalutamide following abiraterone than the reverse.
journal_name
J Clin Medjournal_title
Journal of clinical medicineauthors
Komura K,Fujiwara Y,Uchimoto T,Saito K,Tanda N,Matsunaga T,Ichihashi A,Tsutsumi T,Tsujino T,Yoshikawa Y,Nishimoto Y,Takai T,Minami K,Taniguchi K,Tanaka T,Uehara H,Hirano H,Nomi H,Ibuki N,Takahara K,Inamoto T,Azudoi
10.3390/jcm8081251subject
Has Abstractpub_date
2019-08-19 00:00:00issue
8issn
2077-0383pii
jcm8081251journal_volume
8pub_type
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