IMblaze-370 (AC ; all population), 2019 NCT02788279
atezolizumab plus cometinib (n=183) vs. regorafenib (n=90)
randomized controlled trial
atezolizumab plus cometinib
atezolizumab monotherapy (840 mg every 2 weeks) plus cobimetinib (60 mg orally once daily for days 1–21 of a 28-day cycle). Atezolizumab dose modification was not permitted. Cobimetinib dose modification was permitted and dose reduction for adverse events was allowed
regorafenib
regorafenib (160 mg orally once daily for days 1-21 of a 28-day cycle) Regorafenib dose modifications were allowed on the basis of local prescribing guidelines.
No crossover was allowed per protocol.
mCRC - 2nd line (L2)
Enrolment of patients with RAS wild-type tumours was capped at 50%.
open label
73 academic medical centres and community oncology practices in 11 countries
P3/two sided no interim analysis. Two-sided type I error rate of 0·05 controlled by a hierarchical statistical testing procedure OS then PFS then ORR (testing atezolizumab monotherapy only if atezolizumab plus cobimetinib was positive).
IMblaze370 did not meet its primary endpoint of improved overall survival with atezolizumab plus cobimetinib or atezolizumab versus regorafenib.