Merck, Eisai Discontinue Melanoma Trial
After an interim analysis showed disappointing data, Merck and Eisai say they are discontinuing the Phase 3 LEAP-003 trial evaluating Keytruda plus Lenvima for first-line treatment of adults with unresectable or metastatic melanoma. The decision is based on an independent data monitoring committee recommendation after it found that the combination did not demonstrate an improvement in overall survival, one of the study’s dual primary endpoints, versus Keytruda alone. The companies note that at an earlier interim analysis, the trial did show improvement in progression-free survival, the trial’s other dual primary endpoint.
In a separate Phase 3 study final analysis, the companies found that the LEAP-017 trial evaluating Keytruda plus Lenvima did not meet its primary endpoint of overall survival for treating patients with unresectable and metastatic colorectal cancer that is mismatch repair proficient or not microsatellite instability-high who experienced disease progression on, or became intolerant to, prior therapy.
Currently, the combination use of the two drugs is approved in the U.S., the EU, Japan and other countries for treating advanced renal cell carcinoma (RCC) and certain types of advanced endometrial carcinoma. Merck and Eisai are studying the combination through the LEAP (LEnvatinib And Pembrolizumab) clinical program in multiple tumor types, including but not limited to endometrial carcinoma, hepatocellular carcinoma, melanoma, non-small cell lung cancer, RCC, head and neck cancer, colorectal cancer, gastric cancer and esophageal cancer, across more than 10 clinical trials.