FOLFIRI plus ramucirumab versus paclitaxel plus ramucirumab for patients with advanced or metastatic adenocarcinoma of the stomach or gastroesophageal junction as second-line therapy: Interim safety and efficacy results from the phase II RAMIRIS Study (AIO-STO-0415) of the German Gastric Group at AIO.

Abstract

4023 Background: Ramucirumab as monotherapy and in combination with paclitaxel is a proven second-line option for advanced gastroesophageal adenocarcinoma (GEA). More and more patients (pts) are pretreated with docetaxel in the perioperative or first-line setting. For those pts, the benefit of a combination of ramucirumab and paclitaxel is unclear, and physicians would choose an irinotecan-based regimen as second line treatment. This provides a rationale for the evaluation of FOLFIRI + ramucirumab. Methods: This is a multicenter, randomized, investigator initiated, phase II trial, planned to include 111 pts with advanced GEA to receive 2:1 either FOLFIRI plus ramucirumab every two weeks (Arm A) or paclitaxel (days 1, 8, 15 of a 28-day cycle) plus ramucirumab every two weeks (Arm B). Primary endpoint is 6-months OS rate. This abstract displays interim results of safety and overall objective response (ORR) in docetaxel pre-treated group from up to 65 randomized pts. The results were needed to decide on conducting a subsequent phase III study. Results: 58 (A, 36; B, 22) pts were included in the safety analysis and 50 pts with tumor assessment in the response analysis. Main ≥ grade 3 adverse events were respectively in arms A/B: neutropenia (20%/22%), fatigue (6%/0%), diarrhea (8%/3%), and related SAEs (14% v 23%). Twenty-nine of 50 pts (58%) were pre-treated with docetaxel. In these pts, ORR was 30% in Arm A (5/17) and 8% (1/12) in Arm B. Disease control rate (DCR) was 65% and 50% for Arm A and B respectively. Conclusions: The interim safety analysis of the RAMIRIS trial has demonstrated feasibility of the combination of FOLFIRI and ramucirumab. Docetaxel pre-treated pts had higher ORR and DCR when ramucirumab is combined with FOLFIRI, instead of paclitaxel. EudraCT: 2015-005171-24. Clinical trial information: NCT03081143.