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Supplementary Data from A Novel Third-generation EGFR Tyrosine Kinase Inhibitor Abivertinib for EGFR T790M-mutant Non–Small Cell Lung Cancer: a Multicenter Phase I/II Study

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posted on 2023-03-31, 23:15 authored by Qing Zhou, Lin Wu, Pei Hu, Tongtong An, Jianying Zhou, Li Zhang, Xiao-Qing Liu, Feng Luo, Xin Zheng, Ying Cheng, Nong Yang, Junling Li, Jifeng Feng, Baohui Han, Yong Song, Kai Wang, Jian Fang, Hong Zhao, Yongqian Shu, Xiao-Yan Lin, Zhihong Chen, Bin Gan, Wan-Hong Xu, Wei Tang, Xiaoying Zhang, Jin-Ji Yang, Xiao Xu, Yi-Long Wu
Supplementary Data from A Novel Third-generation EGFR Tyrosine Kinase Inhibitor Abivertinib for EGFR T790M-mutant Non–Small Cell Lung Cancer: a Multicenter Phase I/II Study

Funding

Key Lab System Project of Guangdong Science and Technology Department – Guangdong Provincial Key Lab of Translational Medicine in Lung Cancer

High-level Hospital Construction Project

National Science and Technology Infrastructure Program

National Key Science Projects Program

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ARTICLE ABSTRACT

To establish recommended phase II dose (RP2D) in phase I and evaluate safety and efficacy of abivertinib in patients with EGFR Thr790Met point mutation (T790M)-positive(+) non–small cell lung cancer (NSCLC) with disease progression from prior EGFR inhibitors in phase II. This multicenter, open-label study included 367 adult Chinese patients. Abivertinib at doses of 50 mg twice a day to 350 mg twice a day was evaluated in phase I in continual 28-day cycles, and the RP2D of 300 mg twice a day was used in phase II in continual 21-day cycles. Primary endpoints include RP2D in phase I and objective response rate (ORR) at RP2D in phase II. The RP2D of 300 mg twice a day for abivertinib was established based on pharmacokinetics, efficacy, and safety profiles across doses in phase I. In phase II, 227 patients received RP2D for a median treatment duration of 24.6 weeks (0.43–129). Among 209 response–evaluable patients, confirmed ORR was 52.2% [109/209; 95% confidence interval (CI): 45.2–59.1]. Disease control rate (DCR) was 88.0% (184/209; 95% CI: 82.9–92.1). The median duration of response (DoR) and progression-free survival (PFS) was 8.5 months (95% CI: 6.1–9.2) and 7.5 months (95% CI: 6.0–8.8), respectively. The median overall survival (OS) was 24.9 months [95% CI: 22.4–not reachable (NR)]. All (227/227) patients reported at least 1 adverse event (AE), with 96.9% (220/227) of treatment-related AEs. Treatment-related serious AEs were reported in 13.7% (31/227) of patients. Death was reported in 4.4% (10/227) of patients, and none was deemed as treatment-related. Abivertinib of 300 mg twice a day demonstrated favorable clinical efficacy with manageable side effects in patients with EGFR T790M+ NSCLC.

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