Abstract No : Abstract 1258O
Indication : Non-small cell lung cancer
Intervention : Amivantamab + lazertinib
Company : CHRYSALIS study
Technology : EGFR-MET bispecific antibody + TKI
As of 17 March 2020, 71 patients received the combination: median age was 61 y (36–79), median prior lines was 1 (0–9). In Part 1, the RP2CD was the maximally assessed doses of 1050 mg (1400 mg, ≥80 kg) amivantamab + 240 mg lazertinib. Interim safety profile includes rash (78%), infusion related reaction (61%), paronychia (42%), stomatitis (31%), pruritus (24%), and diarrhea (14%). Majority of treatment-related AEs were grade 1–2, with grade ≥3 reported in 7%. As of 30 April 2020, in 23 Part 1 patients with measurable disease, the overall response rate (ORR) was 43.5% (95% CI, 23.2–65.5) with 10 partial responses (PRs), and 9 patients with stable disease (SD); median treatment duration was 8.2 months (0.5–10.7), with 13 patients still ongoing. In the post-osimertinib expansion Cohort E, early antitumor activity is being observed in 14/20 response-evaluable patients with 1 complete response, 7 PRs (2 pending confirmation), and 6 SD with tumor shrinkage.
Amivantamab can be combined safely with lazertinib at their respective full monotherapy doses. Encouraging preliminary activity was observed in osimertinib-relapsed disease