Core Viewpoint - The company has announced mid-term data from a Phase II clinical trial of its dual-targeting bispecific antibody M701 for treating malignant pleural effusion caused by advanced non-small cell lung cancer (NSCLC), showing significant efficacy compared to the control group receiving cisplatin [1][4]. Group 1: Clinical Trial Overview - The Phase II trial (code name: M70103) is a randomized, controlled, multi-center study involving 54 eligible patients with symptomatic malignant pleural effusion after at least one line of systemic therapy [2]. - Patients were randomly assigned in a 1:1 ratio to receive either M701 or cisplatin after thoracentesis [1][2]. - The primary endpoint is puncture-free survival time (Pu FS), while secondary endpoints include objective response rate (ORR), time to next puncture (TTNP), and related symptoms [1]. Group 2: Patient Demographics - The trial included 26 patients in the M701 group and 28 in the cisplatin group, with median ages of 66.5 and 61.5 years, respectively [2]. - Female proportions were 57.7% in the M701 group and 50.0% in the control group, with ECOG performance status scores of 0-1 being 92.3% and 96.4% [2]. - Baseline characteristics were generally balanced between the two groups, with similar proportions of patients having prior thoracentesis and chemotherapy [2]. Group 3: Efficacy Results - M701 demonstrated a longer median puncture-free survival time compared to cisplatin (130 days vs. 85 days, HR=0.80, p=0.542) [3]. - In patients without driver gene mutations, the median survival was not reached for M701 compared to 44.5 days for cisplatin (HR<0.01, p<0.001) [3]. - The objective response rate for malignant pleural effusion was 72.7% for M701 versus 41.7% for cisplatin [3]. Group 4: Safety Results - The incidence of treatment-related adverse events was 3.7% for M701 compared to 10% for cisplatin, with only one serious adverse event related to M701 [3]. - Flow cytometry analysis indicated a significant reduction of Ep CAM+CD45- tumor cells in the pleural effusion after M701 infusion, which was not observed in the cisplatin group [3]. Group 5: Conclusion and Future Plans - M701 shows significant efficacy and good tolerability in treating malignant pleural effusion, particularly in NSCLC patients without driver gene mutations or those with prior chemotherapy [4]. - The ongoing Phase II trial indicates potential for preventing recurrence of pleural effusion, with plans for a pivotal Phase III trial to start in 2026 to validate efficacy and safety in a larger Chinese population [4].
友芝友生物-B：M701恶性胸水II期研究中期数据在2025年ESMO会议上公布