NCT06617169

Dose-Escalation of MNPR-101-PCTA-177Lu in Solid Tumors

Open Label, Phase 1a, Dose-Escalation Study Evaluating the Safety of Fractionated MNPR-101-PCTA-177Lu Dosing in the Treatment of Solid Tumor Cancers

• Status: Recruiting
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 12 (estimated)
• Sponsor: Monopar Therapeutics · Industry
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This is an open-label, uncontrolled, multi-center, phase 1a MNPR-101-PCTA-177Lu dose-escalation study in patients with solid tumor cancers. Patients must have participated in the imaging study MNPR-101-D001 (actively recruiting, diagnostic study of MNPR-101-DFO\*-89Zr). * TITE-BOIN will be used to objectively determine dose increase, no dose change, or dose decrease for each group of two patients. * The treatment period consists of two 12-week cycles. Patients will receive three equal fractions of MNPR-101-PCTA-177Lu with radioactivity ranging from 480-2240 MBq on each of Cycle 1 Day 1, Cycle 1 Day 15, and Cycle 2 Day 1 (12 weeks after Cycle 1 Day 1). * Patients will be followed for 12 weeks after their last dose of MNPR-101-PCTA-177Lu. * Patients will be imaged at specific timepoints during the study.

Detailed description

This Phase 1a study will enroll qualified participants from the MNPR-101-D001 imaging study. Patients will receive three equal doses of MNPR-101-PCTA-177Lu, dose-escalating in cohorts of two starting at Dose Level 1 (960 MBq).On Cycle 1 Day 1, Cycle 1 Day 15, and Cycle 2 Day 1, patients will receive a 20-minute intravenous infusion of MNPR-101-PCTA-177Lu consisting of an antibody with radioactivity ranging from 480-2240 MBq (Dose Levels 0-4). This study employs a Time-to-Event Bayesian Optimal Interval Design (TITE-BOIN). Dosing of subsequent cohorts will escalate, stay, or de-escalate based on TITE-BOIN predetermined, fixed dose escalation / de-escalation rules. Any hematologic event must be ≤ Grade 1 for dosing to occur, i.e., patients with an active ≥ Grade 2 hematologic event may not be dosed. Any patient experiencing a ≥ Grade 2 allergic reaction during or immediately following infusion will not receive further treatment. Patients experiencing a DLT, at least possibly related to MNPR-101-PCTA-177Lu and occurring within 6 weeks of C1D1, will not receive any further doses. C1D15 and C2D1 doses may be delayed for up to 14 days for specified adverse events. All subjects will undergo SPECT imaging on Cycle 1 Day 8 and Cycle 2 Day 8. CT scans will occur on Cycle 1 Day 43, Cycle 2 Day 1, and Cycle 2 Day 43; a baseline CT scan must be provided. These will allow for the assessment of tumor SUVs, as well as the radiologic response rate by RECIST 1.1. Patients will be followed for safety for 12 weeks following the last dose of MNPR-101-PCTA-177Lu.

Conditions

• Solid Tumor, Adult
• Bladder Cancer
• Urothelial Carcinoma
• Triple-negative Breast Cancer
• Lung Cancer
• Colorectal Cancer
• Gastric Cancer
• Ovarian Cancer
• Pancreatic Cancer

Interventions

Type	Name	Description
DRUG	MNPR-101-PCTA-177Lu	MNPR-101-PCTA-177Lu administered intravenously over approximately 20 minutes, followed by a normal saline flush. Dosing will occur on Cycle 1 Day 1, Cycle 1 Day 15, and Cycle 2 Day 1.

Timeline

• Start date: 2024-10-08
• Primary completion: 2026-12-01
• Completion: 2027-01-01
• First posted: 2024-09-27
• Last updated: 2025-05-21

Locations

1 site across 1 country: Australia

Regulatory

• FDA-regulated drug study