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An Imaging Agent (I-124 M5A) in Detecting CEA-Positive Liver Metastases in Patients With Colorectal Cancer

Pilot Study: Detection of Colorectal Metastatic Liver Disease Preoperatively Using 124I-Labeled M5A Monoclonal Antibody to Carcinoembryonic Antigen (CEA)

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03993327
Enrollment
4
Registered
2019-06-20
Start date
2020-07-15
Completion date
2024-06-04
Last updated
2024-06-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Colorectal Carcinoma Metastatic in the Liver, Metastatic Colorectal Carcinoma, Stage IVA Colorectal Cancer AJCC v8, Stage IVB Colorectal Cancer AJCC v8, Stage IVC Colorectal Cancer AJCC v8, Stage IV Colorectal Cancer AJCC v8

Brief summary

This phase I trial studies how well an imaging agent called I-124 M5A works in detecting CEA-positive colorectal cancer that has spread to the liver. I-124 M5A is a monoclonal antibody, called M5A, linked to a radioactive substance called I-124. M5A binds to CEA-positive cancer cells and may, through imaging scans, be able to detect liver metastases by picking up signals from I-124.

Detailed description

PRIMARY OBJECTIVES: I. To determine the ability of iodine I 124 monoclonal antibody M5A (124I-labeled M5A monoclonal antibody \[MAb\]) to localize to CEA positive gastrointestinal (GI) metastases primarily focused on the liver. SECONDARY OBJECTIVES: I. To determine the safety and pharmacokinetics of administration of 124I-labeled M5A MAb. II. To correlate the radiographic positron emission tomography (PET) images to the liver metastases pathology. III. To assess if the I-124 imaging agent detected additional liver and additional extra-hepatic liver lesions not appreciated on standard imaging scans. OUTLINE: Patients receive iodine I 124 monoclonal antibody M5A intravenously (IV) on day 0 and undergo PET scan on days 2 and 6. After completion of study, patients are followed up periodically for 1 year.

Interventions

BIOLOGICALIodine I 124 Monoclonal Antibody M5A

Given IV

PROCEDUREPositron Emission Tomography

Undergo PET scan

Sponsors

National Cancer Institute (NCI)
CollaboratorNIH
City of Hope Medical Center
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Patients must have histologically confirmed metastatic colorectal cancer with liver metastases. NOTE: We are not requiring proof of CEA positive disease because \> 95% of colorectal cancers are CEA positive * The effects of 124I-M5A on the developing fetus are unknown. For this reason, women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control or abstinence) prior to study entry and for six months following duration of study participation. Should a woman become pregnant or suspect that she is pregnant while participating on the trial, she should inform her treating physician immediately * Patients must have at least 2 known sites of metastatic liver disease. Patients should have at least one resectable liver metastasis as assessed by hepatobiliary surgical oncology * The results of the imaging scans that are performed as part of the standard work up should be available and should have been done within 2 months prior to study entry * All subjects must have the ability to understand and the willingness to sign a written informed consent * Prior therapy (chemotherapy, immunotherapy, radiotherapy) must be completed at least 2 weeks prior to infusion of radiolabeled antibody

Exclusion criteria

* Patients should not have any uncontrolled illness including ongoing or active infection * Patients who have allergy to iodine or iodine contrast agents are not eligible for this protocol * History of allergic reactions attributed to compounds of similar chemical or biologic composition to 124I-M5A * Patients must not have received prior chemotherapy or radiation for \>= 2 weeks before study enrollment * Pregnant women are excluded from this study because 124I-M5A is an agent with the potential for teratogenic or abortifacient effects. Because there is an unknown but potential risk for adverse events in nursing infants secondary to treatment of the mother with 124I-M5A, breastfeeding should be discontinued if the mother is treated with 124I-M5A * Patients with single (= 1) liver metastasis are not eligible for this protocol * Any patient who has had exposure to mouse, chimeric (human/mouse) or humanized immunoglobulin and has antibody to the M5A * Subjects, who in the opinion of the investigator, may not be able to comply with the safety monitoring requirements of the study

Design outcomes

Primary

MeasureTime frameDescription
Tumor targeting pharmacokinetic parameters of iodine I 124 monoclonal antibody M5ADays 0, 2, and 6 drawn at approximately 1 hour, 2 hour and 3-4 hours post-end of infusionWill be observed using standard imaging scans obtained pre-operatively and to assess if the antibody detects new liver metastases. Serum concentration data will be tabulated and descriptive statistics computed.
Percent of known liver lesions per standard staging scans identified on iodine I-124 (I-124) M5A imagingUp to 1 year

Secondary

MeasureTime frameDescription
Surgical pathology results (when available) on lesions positive on I-124 M5A but negative on standard imagingUp to 1 yearpercent of patients with pathological confirmation of liver metastases
Surgical results (when available per standard of care surgery/pathology) on lesions negative on I-124 M5A but positive on standard scansUp to 1 yearpercent of patients with pathological confirmation of liver metastases
Incidence of adverse eventsUp to 14 days post infusionWill be graded according to Common Terminology Criteria for Adverse Events (CTCAE) version 5.0. Safety data will be displayed and abnormal laboratory values reported. The frequency of adverse events will be tabulated by body system.
I-124 identification of extra-hepatic lesions (both previously noted or new)Up to 1 yearpercent of patients with suspicious extra-hepatic lesions (both previously noted or new) identified on I-124 M5A but were not identified on standard imaging
Percent of patients with suspicious liver lesions identified on I-124 M5A but were not identified on standard imagingUp to 1 year

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026