At a pre-specified interim analysis in LITESPARK-005, WELIREG reduced the risk of disease progression or death compared to everolimus
First Phase 3 trial to show positive results in patients with advanced RCC following both immune checkpoint and anti-angiogenic therapies in later lines of treatment
RAHWAY, N.J.--(BUSINESS WIRE)-- Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced results from the Phase 3 LITESPARK-005 trial investigating WELIREG, Merck’s first-in-class, oral hypoxia-inducible factor-2 alpha (HIF-2α) inhibitor, for the treatment of adult patients with advanced renal cell carcinoma (RCC) that progressed following PD-1/L1 and vascular endothelial growth factor receptor (VEGFR) targeted therapies. In the study, WELIREG demonstrated a statistically significant improvement in one of the trial’s dual primary endpoints of progression-free survival (PFS) and in a key secondary endpoint of objective response rate (ORR) compared to everolimus. These late-breaking data are being presented for the first time today during a proffered paper session at the European Society for Medical Oncology (ESMO) Congress 2023 (abstract #LBA88) and are also being discussed with regulatory authorities worldwide.
At the first pre-specified interim analysis (IA1) at a median follow-up of 18.4 months (range, 9.4-31.7), WELIREG significantly reduced the risk of disease progression or death by 25% (HR=0.75 [95% CI, 0.63-0.90]; p