Article
作者: Zheng, Meifang ; Zhou, Hui ; Cai, Zhen ; Liu, Jing ; Zhou, Jianfeng ; Yao, Hongxia ; Yang, Wei ; Xiang, Ying ; Zhang, Qingyuan ; Lv, Fangfang ; Feng, Jifeng ; Wang, Huaqing ; Lin, Jinying ; Sang, Wei ; Liu, Wei ; Cao, Yongqing ; Zhang, Huilai ; Yang, Shun'e ; Shuang, Yuerong ; Zhou, Keshu ; Zeng, Shan ; Zhang, Hongyu ; Guo, Ye ; Ge, Zheng ; Feng, Ru ; Li, Wei ; Zhang, Mingzhi ; Xu, Hao ; Zou, Qingfeng ; Wang, Shuye ; Zhao, Hongguo ; Zou, Liqun ; Song, Yuqin ; Qiu, Lugui ; Liang, Aibin ; Du, Xin ; Wang, Lin ; Zhang, Wei ; Zhang, Xiaohong ; Zuo, Xuelan ; Shao, Zonghong ; Huang, Haiwen ; Liu, Peng ; Ma, Junxun ; Yu, Jie ; Ran, Wenhua ; Li, Yan ; Pang, Ying ; Sun, Xing ; Chen, Zhendong ; Zhu, Jun ; Gao, Da ; Xu, Wei ; Hou, Ming ; Xia, Ruixiang ; Liu, Lin
INTRODUCTION:Patients with diffuse large B-cell lymphoma (DLBCL) have limited access to rituximab. IBI301 is a recombinant chimeric murine/human anti-CD20 monoclonal antibody and is a candidate biosimilar to rituximab. This study aimed to assess the therapeutic equivalence of IBI301 and rituximab in previously untreated patients with diffuse large B-cell lymphoma (DLBCL).
METHODS:This multicenter, randomized, double-blind, parallel-group, phase 3 trial compared IBI301 and rituximab, both plus the chemotherapy of doxorubicin, cyclophosphamide, vindesine, and prednisone (CHOP), was conducted in 68 centers across China. Eligible patients with untreated CD20 positive (CD20+) DLBCL randomly received IBI301 (375 mg/m2) plus the standard CHOP or rituximab (375 mg/m2) plus the standard CHOP for six cycles of a 21-day cycle. The primary end point was the overall remission rate (ORR). Efficacy equivalence was defined if 95% CIs for the ORR difference between the two groups were within a ± 12.0% margin.
RESULTS:Between August 22, 2016, and September 5, 2018, 419 patients were randomly allocated into the IBI301 group (N = 209) and rituximab group (N = 210). In the full analysis set, the ORR was 89.9% and 93.8% in the IBI301 and rituximab groups, respectively, and the ORR difference was -3.9% (95% CI - 9.1%-1.3%), falling within a ± 12.0% margin. The occurrences of treatment-emergent adverse events (TEAEs) (100% vs. 99.0%) and AEs of grade ≥ 3 (87.1% vs. 83.3%) were similar in the two groups (P > 0.05).
CONCLUSIONS:IBI301 had a non-inferiority efficacy and a comparable safety compared with rituximab. IBI301 plus CHOP could be suggested as a candidate treatment regimen for untreated patients with CD20+ DLBCL.
TRIAL REGISTRATION:This trial is registered on ClinicalTrials.gov (NCT02867566).