A Study of Vebreltinib and Platinum-Containing Double Agents in Subjects With MET-Positive

Part 1 (Lead-in Period):

The lead-in period is set before the randomized controlled period, aiming to evaluate the safety, tolerability, and preliminary efficacy of Vebreltinib Enteric Capsule combined with platinum-based doublet chemotherapy, and to determine the recommended dose of Vebreltinib Enteric Capsule combined with platinum-based doublet chemotherapy. Initially, it is planned to set up 2 dose groups in the lead-in period. After the screening period, eligible subjects will be assigned to the 2 dose cohorts in chronological order, and the subjects will receive oral treatment of Vebreltinib Enteric Capsule at different doses combined with intravenous chemotherapy of standard-dose platinum-based doublet according to the cohort assignment.

Vebreltinib Enteric Capsule: Each cycle is 3 weeks (21 days), administered orally twice a day (BID), and the dose level depends on the cohort assignment.

Platinum-based doublet chemotherapy: Each cycle is 3 weeks (21 days), and it is administered once on Day 1 (D1) of each cycle. Pemetrexed 500 mg/m² + platinum (carboplatin AUC5 or cisplatin 75 mg/m²) is given by intravenous infusion for 4 to 6 cycles as the initial treatment, and then it is switched to pemetrexed (500 mg/m²) by intravenous infusion as the maintenance treatment.

In this part, the "3+3" dose escalation design will be adopted to determine the maximum tolerated dose (MTD) and/or the recommended dose of the combination of Vebreltinib Enteric Capsule and platinum-based doublet treatment in subjects with locally advanced or metastatic non-squamous NSCLC.

Part 2 (Randomized Controlled Period):

After completing the lead-in period study in Part 1, once the investigator and the sponsor have determined the recommended dose of the combination of Vebreltinib Enteric Capsule, the randomized controlled study in Part 2 will be carried out to evaluate the efficacy of Vebreltinib Enteric Capsule combined with platinum-based doublet chemotherapy compared with platinum-based doublet chemotherapy in subjects with locally advanced or metastatic non-squamous NSCLC carrying MET amplification.

After the screening period, eligible subjects will be stratified according to the stratification factors (baseline brain metastasis status \[yes vs no\], MET gene copy number \[GCN\] \[≥4 and \<6 vs ≥6 and \<10 vs ≥10\]) and randomly assigned to the experimental group or the control group at a 1:1 allocation ratio using the stratified block randomization method. The experimental group will receive the treatment regimen of Vebreltinib Enteric Capsule combined with platinum-based doublet chemotherapy, and the control group will receive the platinum-based doublet chemotherapy regimen.