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Early Phase 1
Age: 18Years - 90Years
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ID05603559

Study of 177Lu-P17-087 and 177Lu-P17-088 Radioligand Therapy for Men with Metastatic Castration-Resistant Prostate Cancer Evaluating Safety, Dosage, and Imaging-Based Radiation Dose

Led by Peking Union Medical College Hospital · Updated on 2025-10-03

30

Participants Needed

1

Research Sites

108 weeks

Total Duration

AI-Summary

What this Trial Is About

Researchers are evaluating the safety, dosimetry, and preliminary antitumor activity of two new radiopharmaceutical treatments, 177Lu-P17-087 and 177Lu-P17-088, in men with metastatic castration-resistant prostate cancer mCRPC that has progressed despite androgen-suppression therapy or chemotherapy. This early-phase pilot study focuses on measuring the absorbed radiation dose using imaging and assessing side effects to determine the optimal therapeutic dose. Prostate-specific membrane antigen PSMA is targeted due to its presence on prostate tumor cells, with these new compounds designed to improve tumor uptake and blood clearance compared to earlier treatments. Participants receive a single intravenous injection of either 1.1 GBq 30 mCi of 177Lu-P17-087 or 1.1 GBq 30 mCi of 177Lu-P17-088. Following this, patients are monitored through multiple whole-body planar and SPECTCT imaging sessions at 1.5, 4, 24, 48, 72, 120, and 168 hours post-injection to measure radiation dose and distribution. After this initial safety phase, the study will proceed to a dose-escalation phase with increasing doses across three groups 1.11 GBq, 2.96 GBq, and 4.44 GBq, to further evaluate safety and find the best therapeutic dose. During the study, participants undergo repeated imaging and laboratory tests to assess radiation doses to organs and tumors, as well as monitoring for hematologic, liver, and kidney side effects. Researchers also track prostate-specific antigen PSA and PSMA responses to treatment. Monitoring continues for about two to three weeks after treatment for safety and response assessments. Total participation duration varies based on study phase and dose escalation steps, with careful observation to establish safe and effective dose levels.

CONDITIONS

Brief Title

177Lu-P17-087/177Lu-P17-088 in Patients With Metastatic Castration-resistant Prostate Cancer

Research Team

Z

Zhaohui Zhu, MD

G

Guochang Wang, MD

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