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Aikou Okamoto,Eiji Kondo,Toshiaki Nakamura,Satoshi Yanagida,Junzo Hamanishi,Kenichi Harano,Kosei Hasegawa,Takeshi Hirasawa,Kensuke Hori,Shinichi Komiyama,Motoki Matsuura,Hidekatsu Nakai,Hiroko Nakamur 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.2
Objective: To evaluate the efficacy and safety of niraparib in Japanese women with heavilypretreated ovarian cancer. Methods: This Phase 2 open-label, single-arm study enrolled Japanese women withhomologous recombination deficiency-positive relapsed, high-grade serous ovarian,fallopian tube, or primary peritoneal cancer who had completed 3–4 lines of therapy. The starting dose of niraparib was 300 mg administered once daily in continuous 28-daycycles until objective progressive disease, unacceptable toxicity, consent withdrawal ordiscontinuation. The primary endpoint, objective response rate (ORR), was assessed bythe investigator using RECIST version 1.1. Safety evaluations included the incidence oftreatment-emergent adverse events (TEAEs), including serious TEAEs. Results: Twenty women were enrolled and the confirmed ORR in the full analysis set (FAS)was 35.0% (7/20), consisting of 1 complete response and 6 partial responses. Diseasecontrol rate in the FAS was 90.0%. The most frequently reported TEAEs (>50%) wereanemia, nausea, and platelet count decreased. One patient (5.0%) had TEAEs leadingto discontinuation of niraparib whereas reductions or interruptions were reported in 14(70.0%) and 15 (75.0%) patients, respectively. The median dose intensity (202.9 mg daily)corresponded to a relative dose intensity of 67.6%. Conclusion: Efficacy and safety of niraparib in heavily pretreated Japanese women wascomparable to that seen in an equivalent population of non-Japanese women. No new safetysignals were identified.Trial Registration: ClinicalTrials.gov Identifier: NCT03759600