Safety Study of 188Re-PTI-6D2 in Patients With Metastatic Melanoma

Status Completed

Clinical Trial Summary

The purpose of this first-in-man study is to evaluate the safety of 188Re-PTI-6D2 in patients with metastatic melanoma. All patients will receive a tracer dose of 188Re-PTI-6D2 in order to provide information on how the monoclonal antibody is distributed throughout the body and to assess tumor targeting. No therapeutic dose of radiation will be given in the first study.

Clinical Trial Description

This study will evaluate the safety and feasibility of the administration of 188Re-PTI-6D2 in patients with metastatic melanoma. Patients with confirmed Stage IIIc (unresectable) or Stage IV melanoma who meet all eligibility criteria will undergo a thorough physical examination and baseline tumor imaging (whole body 18FDG PET/CT and MRI brain) to document all sites of tumor.

Treatment will be administered on an inpatient basis. An initial cohort of 3 patients will receive a tracer dose of 188Re-PTI-6D2 without any preceding unlabeled antibody. The tracer dose will consist of 10 mCi of rhenium-labeled antibody; the amount of antibody (in mg) will depend on specific activity and is estimated to range from 2 to 10 mg. Additional cohorts of three patients each will receive 10 mg, 20 mg, and 50 mg of unlabeled PTI-6D2 immediately preceding administration of the tracer dose. Patients will undergo serial gamma scans and SPECT/CT imaging at specified time points. Blood samples will be obtained prior to dosing and at specified intervals for PK measurements of the mAb as well as for measurement of serum radioactivity. Urine will also be collected for all patients to measure excreted radioactivity. Patients will be closely monitored for safety throughout the duration of the study.

Patients will remain at the study center for 48 hours after infusion to allow adequate time for post-treatment safety observation, monoclonal antibody clearance and rhenium decay. Prior to the escalation of the dose of unlabeled PTI-6D2, safety data from the inpatient period and 2-week follow-up visit for the three patients at the current dose level will be reviewed. If there is no evidence of a safety risk, the dose of unlabeled PTI-6D2 will be escalated for the next cohort of patients. Dose escalation of unlabeled antibody will occur according to a specific scheme. ;

Study Design

Allocation: Non-Randomized, Endpoint Classification: Safety Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT00399113
Study type	Interventional
Source	Pain Therapeutics
Contact
Status	Completed
Phase	Phase 1
Start date	May 2007

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