A Study of LY4257496 in Participants With Cancer (OMNIRAY)

The main purpose of this study is to evaluate safety, tolerability, and efficacy of LY4257496 alone and as part of relevant standard of care (SOC) combination therapy in participants with Gastrin-releasing Peptide Receptor (GRPR)-positive advanced cancer, including but not limited to breast, colorectal, prostate, endometrial, esophageal, gastroesophageal (GE) junction, and gastric cancer. The study will also evaluate the safety, tolerability, and efficacy of LY4257529 to identify cancer with high levels of a protein called GRPR. This is a 2-part study. Participation could last up to 36 weeks or until your tumor progresses.

NCT Number	NCT07114601
Lead Sponsor	Eli Lilly and Company
Conditions	Breast Neoplasms, Colorectal Neoplasms, Prostate Neoplasm, Endometrial Neoplasms, Neoplasm Metastasis, Stomach Neoplasms, Esophageal Neoplasms
Enrollment	421 participants
Start Date	2025-08-06
Primary Completion	2030-04 (estimated)
Study Completion	2035-04 (estimated)
Updated on ClinicalTrials.gov	2026-08-06