Huiping Li1, Rongrui Liu2, Bin Shao1, Ran Ran1, Guohong Song1, Ke Wang3, Yehui Shi3, Jihong Liu4, Wenjing Hu5, Fu Chen1, Xiaoran Liu1, Gairong Zhang2, Chuanhua Zhao2, Ru Jia2, Quanren Wang6, Hope S Rugo7, Yifan Zhang8, Guangze Li6, Jianming Xu2. 1. Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Breast Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China. 2. Department of Gastrointestinal Oncology, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China. 3. Department of Gynecological Oncology, Tianjin Medical University Cancer Institute & Hospital, Tianjin 300060, China. 4. Department of Gynecologic Oncology, Sun Yat-sen University Cancer Centre, Guangzhou 510060, China. 5. The Comprehensive Cancer Center of Drum Tower Hospital, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China. 6. Department of Clinical Medicine-Oncology, Jiangsu Hengrui Medicine Co., Ltd., Shanghai 201203, China. 7. Department of Medicine, University of California San Francisco Comprehensive Cancer Center, San Francisco 94127, USA. 8. State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
Abstract
OBJECTIVE: Fluzoparib (SHR3162) is a novel, potent poly(ADP-ribose) polymerases (PARP)1, 2 inhibitor that showed anti-tumor activity in xenograft models. We conducted a phase I, first-in-human, dose-escalation and expansion (D-Esc and D-Ex) trial in patients with advanced solid cancer. METHODS: This was a 3+3 phase I D-Esc trial with a 3-level D-Ex at 5 hospitals in China. Eligible patients for D-Esc had advanced solid tumors refractory to standard therapies, and D-Ex enrolled patients with ovarian cancer (OC). Fluzoparib was administered orally once or twice daily (bid) at 11 dose levels from 10 to 400 mg/d. Endpoints included dose-finding, safety, pharmacokinetics, and antitumor activity. RESULTS: Seventy-nine patients were enrolled from March, 2015 to January, 2018 [OC (47, 59.5%); breast cancer (BC) (16, 20.3%); colorectal cancer (8, 10.1%), other tumors (8, 10.1%)]; 48 patients were treated in the D-Esc arm and 31 in the D-Ex arm. The maximum tolerated dose (MTD) was 150 mg bid, with a half-life of 9.14 h. Grade 3/4 adverse events included anemia (7.6%) and neutropenia (5.1%). The objective response rate (ORR) was 30% (3/10) in patients with platinum-sensitive OC and 7.7% (1/13) in patients with BC. Among patients treated with fluzoparib ≥120 mg/d, median progression-free survival (mPFS) was 7.2 [95% confidence interval (95% CI), 1.8-9.3] months in OC, 9.3 (95% CI, 7.2-9.3) months in platinum-sensitive OC, and 3.5 (range, 2.0-28.0) months in BC. In patients with germline BC susceptibility gene mutation (gBRCA Mut) (11/43 OC; 2/16 BC), mPFS was 8.9 months for OC (range, 1.0-23.2; 95% CI, 1.0-16.8) and 14 and 28 months for BC (those two patients both also had somaticBRCA Mut). CONCLUSIONS: The MTD of fluzoparib was 150 mg bid in advanced solid malignancies. Fluzoparib demonstrated single-agent antitumor activity in BC and OC, particularly in BRCA Mut and platinum-sensitive OC.
OBJECTIVE: Fluzoparib (SHR3162) is a novel, potent poly(ADP-ribose) polymerases (PARP)1, 2 inhibitor that showed anti-tumor activity in xenograft models. We conducted a phase I, first-in-human, dose-escalation and expansion (D-Esc and D-Ex) trial in patients with advanced solid cancer. METHODS: This was a 3+3 phase I D-Esc trial with a 3-level D-Ex at 5 hospitals in China. Eligible patients for D-Esc had advanced solid tumors refractory to standard therapies, and D-Ex enrolled patients with ovarian cancer (OC). Fluzoparib was administered orally once or twice daily (bid) at 11 dose levels from 10 to 400 mg/d. Endpoints included dose-finding, safety, pharmacokinetics, and antitumor activity. RESULTS: Seventy-nine patients were enrolled from March, 2015 to January, 2018 [OC (47, 59.5%); breast cancer (BC) (16, 20.3%); colorectal cancer (8, 10.1%), other tumors (8, 10.1%)]; 48 patients were treated in the D-Esc arm and 31 in the D-Ex arm. The maximum tolerated dose (MTD) was 150 mg bid, with a half-life of 9.14 h. Grade 3/4 adverse events included anemia (7.6%) and neutropenia (5.1%). The objective response rate (ORR) was 30% (3/10) in patients with platinum-sensitive OC and 7.7% (1/13) in patients with BC. Among patients treated with fluzoparib ≥120 mg/d, median progression-free survival (mPFS) was 7.2 [95% confidence interval (95% CI), 1.8-9.3] months in OC, 9.3 (95% CI, 7.2-9.3) months in platinum-sensitive OC, and 3.5 (range, 2.0-28.0) months in BC. In patients with germline BC susceptibility gene mutation (gBRCA Mut) (11/43 OC; 2/16 BC), mPFS was 8.9 months for OC (range, 1.0-23.2; 95% CI, 1.0-16.8) and 14 and 28 months for BC (those two patients both also had somaticBRCA Mut). CONCLUSIONS: The MTD of fluzoparib was 150 mg bid in advanced solid malignancies. Fluzoparib demonstrated single-agent antitumor activity in BC and OC, particularly in BRCA Mut and platinum-sensitive OC.
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