GSK, iTeos Therapeutics Scrap Lung Cancer Candidate

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GSK and development partner iTeos Therapeutics are ending the development program for belrestotug, an anti-TIGIT monoclonal antibody in previously untreated, unresectable, locally advanced or metastatic PD-L1 high non-small cell lung cancer. The decision is based on new interim analyses from the phase 2 GALAXIES Lung-201 and GALAXIES H&N-202 studies, which did not meet the established efficacy criteria for continued development, GSK says.

“The GALAXIES Lung-201 data continued to demonstrate clinically meaningful improvements in the trial’s primary endpoint of objective response rate (ORR), however the analysis did not meet established criteria for clinically meaningful improvements in the secondary endpoint of progression free survival in the belrestotug + dostarlimab [GSK’s Jemperli] combination cohorts versus dostarlimab monotherapy,” iTeos says. Additionally, it says data from the GALAXIES H&N-202 Phase 2 trial “showed a trend below the meaningful threshold for ORR” in the belrestotug combination cohorts vs. dostarlimab monotherapy in PD-L1 positive head and neck squamous cell carcinoma.

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