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MINI 30 - New Kinase Targets (ID 157)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Treatment of Advanced Diseases - NSCLC
- Presentations: 1
MINI30.07 - Crizotinib in Patients with ROS1 NSCLC. Preliminary Results of the AcSé Trial (ID 2426)
18:30 - 20:00 | Author(s): A. McLeer-Florin
To avoid uncontrolled off-label use and allow for a nationwide safe access to crizotinib (crz) for patients (pts) with an ALK, MET or ROS1 positive (+) tumor, the French National Cancer Institute (INCa) launched the AcSé program, funding both access to tumor molecular diagnosis and an exploratory multi-tumor 2-stage design phase II trial. We report the preliminary results of the ROS1+ NSCLC cohort.
ROS1 status was assessed in 28 regional INCa molecular genetic centers by break-apart FISH assays in tumor samples showing an IHC score of ≥1+. Pts with ROS1 rearrangements, progressing after at least one standard treatment (including a platinum-based doublet, unless pts were considered as unfit for chemotherapy) were proposed to receive crz 250 mg BID. Responses were centrally assessed using RECIST v1.1. The objective response rate (ORR) and disease control rate (DCR) were assessed every 8 weeks.
From Aug. 5, 2013 to Mar. 1, 2015, 39 pts with ROS1+ NSCLC were enrolled. 37 pts had received crz, leading to 37 pts with clinical information. Median age: 62 years (range 33–81), 70% females, 95% non-squamous histology, and 94% metastatic disease at study entry. Median number of prior treatments: 2 (range 1 –7). Twenty four pts were still on treatment at the cut-off date, 13 have stopped crz (8 PD, 3 adverse events (AEs), 2 deaths). Among the 27 pts evaluable for response at 8 weeks, we observed 16 PR, 7 SD and 4 PD, leading to ORR=59% [95% CI:39-78], and DCR=85% [66-96]. DCR at 6 months was 57% (disease control was achieved in 12/21 evaluable pts). Crz was well tolerated with only 4 grade ≥3 (1 AE + 3 SAEs) and 9 grade 1-2 SAEs. Most common AEs, mainly grade 1, were visual disorders (54% of pts), peripheral edema (51%), diarrhea (48%), nausea (46%), and elevated transaminases (43%).
Crz was well tolerated and achieved a robust treatment response rate in ROS1+ NSCLC. These results underline the interest of integrating ROS1 in biomarkers routine screening. Survival data and duration of response will be presented.
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