Veracyte, Inc. announced that new data published online in The Lancet Oncology suggest that the company's Immunoscore Immune Checkpoint (IC) assay may identify patients with metastatic colorectal cancer (mCRC) who are likely to benefit from the addition of immune checkpoint inhibitor (ICI) therapy to standard first-line treatment. The findings are from the randomized, controlled, phase II AtezoTRIBE trial, a multicenter Italian clinical study, sponsored by GONO Foundation. The vast majority of mCRC tumors (approximately 95 percent) have a proficient DNA mismatch repair (pMMR) system and are microsatellite stable.

These tumors have low immunogenicity and do not derive benefit from immune checkpoint inhibitors. Previous research suggests that the FOLFOXIRI and bevacizumab combination enhances immunogenicity in pMMR mCRC. In the current study, researchers found a modest benefit of the experimental treatment regimen in this subgroup.