Regeneron Pharmaceuticals (REGN) said late Thursday that combination therapy of GN7075 and Libtayo, or cemiplimab, led to anti-tumor responses in patients with microsatellite stable colorectal cancer based on data from the dose-escalation portion of an ongoing phase 1/2 trial.
Efficacy results from 51 patients with microsatellite stable colorectal cancer showed a 6% overall response rate and a 29% disease control rate, the drugmaker said.
"Microsatellite stable colorectal cancer has historically been unresponsive to immunotherapy" but the combination therapy showed "anti-tumor responses in a highly difficult-to-treat cancer," according to a trial investigator.
Safety was evaluated in 84 patients across multiple solid tumor types at various doses of REGN7075. Treatment-emergent adverse events of any grade occurred in 98% of patients, while treatment-related adverse events occurred in 90% of patients, the company said.
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