Phase 12a Study of 64Cu-LNTH-1363S PETCT Imaging in Patients with Sarcoma or Gastrointestinal Tract Cancer Evaluating Safety, Dosage, and Imaging Correlation with FAP Expression

What this Trial Is About

Researchers are evaluating the imaging agent 64Cu-LNTH-1363S in patients with sarcomas or gastrointestinal tract GIT cancers to assess its safety, determine the best imaging dose and timing, and compare the imaging results with fibroblast activation protein FAP expression in tumor samples. This Phase 12a open-label study is divided into two parts and aims to better understand how this radiolabeled agent behaves in the body and how well it highlights tumors that express FAP. In Part 1, six patients with metastatic sarcomas will receive a fixed dose of 64Cu-LNTH-1363S to evaluate its distribution, radiation dose, and optimal imaging window during a one-day intervention, followed by a safety follow-up. In Part 2, approximately 20 patients with non-metastatic, operable sarcomas or GIT cancers scheduled for surgery will receive the optimal dose determined in Part 1 to study the correlation between imaging results and tissue FAP expression. Both parts include detailed cardiac monitoring to assess any changes in heart activity related to the agent. Participants will undergo screening before receiving the imaging agent, followed by serial PETCT scans at multiple timepoints on the intervention day to measure biodistribution and image quality. Tissue samples collected during surgery will be analyzed to compare with imaging findings. Safety and tolerability will be monitored through follow-up visits, ECGs, and phone contact. The total study duration varies from about three weeks for Part 1 to up to 11 weeks for Part 2, including surgery and post-surgery sample collection.

64Cu-LNTH-1363S in Patients With Sarcoma or Gastrointestinal Tract Cancer