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- Title
Olaparib in patients with mCRPC with homologous recombination repair gene alterations: PROfound Asian subset analysis.
- Authors
Matsubara, Nobuaki; Nishimura, Kazuo; Kawakami, Satoru; Joung, Jae Young; Uemura, Hiroji; Goto, Takayuki; Kwon, Tae Gyun; Sugimoto, Mikio; Kato, Masashi; Wang, Shian-Shiang; Pang, See-Tong; Chen, Chung-Hsin; Fujita, Tomoko; Nii, Masahiro; Shen, Liji; Dujka, Melanie; Hussain, Maha; Bono, Johann de
- Abstract
Background The Phase III PROfound study (NCT02987543) evaluated olaparib versus abiraterone or enzalutamide (control; randomized 2:1 to olaparib or control) in men with homologous recombination repair gene alterations and metastatic castration-resistant prostate cancer whose disease progressed on prior next-generation hormonal agent. Methods We present efficacy and safety data from an exploratory post hoc analysis of olaparib in the PROfound Asian subset. Analyses were not planned, alpha controlled or powered. Of 101 Asian patients enrolled in Japan (n =57), South Korea (n =29) and Taiwan (n =15), 66 and 35 patients received olaparib and control, respectively. Results Radiographic progression-free survival (rPFS) and overall survival (OS) favored olaparib versus control in Cohort A [rPFS 7.2 vs. 4.5 months, HR 0.58, 95% CI 0.29–1.21, P = 0.14 (nominal); OS 23.4 vs. 17.8 months, HR 0.81, 95% CI 0.40–1.74, P = 0.57 (nominal)] and Cohorts A+B [rPFS 5.8 vs. 3.5 months, HR 0.69, 95% CI 0.42–1.16, P = 0.13 (nominal); OS 18.6 vs. 16.2 months, HR 0.96, 95% CI 0.56–1.70, P = 0.9 (nominal)]. Olaparib showed greatest improvement in patients harboring BRCA alterations [rPFS 9.3 vs. 3.5 months, HR 0.17, 95% CI 0.06–0.49, P = 0.0003 (nominal); OS 26.8 vs. 14.3 months, HR 0.62, 95% CI 0.24–1.79, P = 0.34 (nominal)]. Safety data were consistent with the known profile of olaparib, with no new safety signals identified. Conclusion In PROfound, there was a statistically significant improvement in outcomes reported in the global population of patients with metastatic castration-resistant prostate cancer and alterations in homologous recombination repair genes whose disease progressed on prior next-generation hormonal agent compared with control. For the subset of Asian patients reported here, exploratory analysis suggested that there was also an improvement in outcomes versus control. The safety and tolerability of olaparib in Asian patients were similar to that of the PROfound global population. Clinical trial number ClinicalTrials.gov NCT02987543
- Publication
Japanese Journal of Clinical Oncology, 2022, Vol 52, Issue 5, p441
- ISSN
0368-2811
- Publication type
Article
- DOI
10.1093/jjco/hyac015