NCT00199862

Safety Study of Radio-labeled huA33 Antibody in Colorectal Cancer

A Pilot Study of Radioimmunodetection of 124-Iodine-labeled Humanized A33 Antibody (124I-huA33) in Patients With Colorectal Cancer

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (estimated)
• Sponsor: Memorial Sloan Kettering Cancer Center · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The purpose of this study is to determine whether our drug, 124I-huA33, can safely detect colorectal cancer.

Detailed description

This is an open-label, pilot study of a single 4mCi-10mCi/10mg IV dose of 124I-huA33 in patients with colorectal cancer. Patients will be studied with 124I-huA33 positron-emission tomography (PET), and in the subset of patients scheduled for surgery, based on clinical indications, ex vivo quantitation of tumor uptake will also be performed. Patients will receive a single intravenous or intraarterial infusion of 4 mCi-10mCi /10mg 124I-huA33 in 5-30ml of 5% human serum albumin (HSA), over 5-10 minutes. Patient will either receive the 124I-huA33 intravenously (IV) or intraarterially (IA) to determine if there is an advantage of the IV vs the IA route. Following injection with 124I-huA33, on study days 2, 3, and/ or 4, patients will have the option to receive up to 2g/1kg of Immune Globulin (IVIG). Blood samples will be obtained for pharmacokinetic analysis at 5, 15, 60, and 120 minutes after completion of IV or IA infusion, on day 2, 3, and/ or 4, and before and after the PET scan on the day of surgery or last imaging day (day 8 + 3). Patients scheduled for surgery will undergo a PET scan of the abdomen and pelvis 1-6 hours prior to surgery. In those patients undergoing surgery, surgery (or biopsy) will be scheduled to occur day 8 (± 3 days) days after administration of 124I-huA33. Biopsy sites may include tumor, tumor bed, regional nodes, portal, suprapancreatic, celiac nodes and the retroperitoneum. Tumor and normal tissue obtained at surgery (or biopsy), and serum will be measured for estimation of percent-injected dose per gram of tumor, normal liver, and serum. Tissue samples will be obtained for autoradiography and immunohistochemistry as an additional assessment of tumor targeting. Blood samples to determine immunogenicity will be taken at baseline and at 4 weeks. Toxicity assessments will be made throughout the study period.

Conditions

• Colorectal Neoplasms
• Colorectal Cancer
• Colorectal Tumor
• COlorectal Carcinoma

Interventions

Type	Name	Description
DRUG	Iodine-124 labeled humanized A33 (antibody)	Patients will receive a single intravenous or intraarterial infusion of 10mg huA33, labeled with 4mCi-10mCi of 124I in 5-30ml of 5% HSA in normal saline (NS), over 5-10 minutes. On study days 2, 3, and/or 4 patients will have the option to receive up to 2g/kg of IVIG. Patients will be evaluated with 124I-huA33 positron-emission tomography (PET) with ex vivo quantitation of tumor uptake.

Timeline

• Start date: 2004-02-01
• Primary completion: 2025-07-02
• Completion: 2025-07-02
• First posted: 2005-09-20
• Last updated: 2025-07-04

Locations

1 site across 1 country: United States