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Copper Cu 64-DOTA-Trastuzumab PET in Predicting Response to Treatment With Ado-Trastuzumab Emtansine in Patients With Metastatic HER2 Positive Breast Cancer

A Pilot Study of 64Cu-DOTA-Trastuzumab Positron Emission Tomography in Treatment of Advanced HER2 Positive Breast Cancer With the Antibody Drug Conjugate Ado-trastuzumab Emtansine

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02226276
Enrollment
10
Registered
2014-08-27
Start date
2015-01-07
Completion date
2026-09-29
Last updated
2026-02-13

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

Conditions

Bone Metastases, HER2-positive Breast Cancer, Liver Metastases, Lung Metastases, Recurrent Breast Cancer, Soft Tissue Metastases, Stage IV Breast Cancer

Brief summary

This pilot clinical trial studies how well copper Cu 64-tetra-azacyclododecanetetra-acetic acid (DOTA)-trastuzumab positron emission tomography (PET) works in predicting response to treatment with ado-trastuzumab emtansine in patients with human epidermal growth factor receptor 2 (HER2) positive breast cancer that has spread to other places in the body. Copper Cu 64-DOTA-trastuzumab is a chemotherapy drug (trastuzumab) attached to a radioactive substance. Diagnostic procedures using PET may allow scanners to take pictures of where the drug travels in the body and may help doctors identify which patients may benefit from treatment with ado-trastuzumab emtansine.

Detailed description

PRIMARY OBJECTIVES: I. Correlate uptake of 64Cu-DOTA-trastuzumab (copper Cu 64-DOTA-trastuzumab) PET by individual tumors with subsequent tumor response to ado-trastuzumab emtansine as assessed by serial 18F-fludeoxyglucose (FDG) (fludeoxyglucose F 18)/PET-computed tomography (CT). II. Compare tumor uptake of 64Cu-DOTA-trastuzumab PET between patients who do and patients who do not respond to ado-trastuzumab emtansine. III. Obtain tumor tissue for subsequent assessment of the presence of putative molecular mechanisms of resistance (MMRs) to ado-trastuzumab emtansine. When funding becomes available, those samples will be used to explore the correlation between the presence of MMRs as assessed by histopathology and tumor response to ado-trastuzumab emtansine both in univariate analysis and in combination with tumor uptake of 64Cu-DOTA-trastuzumab as measured with PET/CT. OUTLINE: Patients undergo whole body fludeoxyglucose F 18 PET/CT. Patients then receive trastuzumab intravenously (IV) over 15 minutes immediately before receiving copper Cu 64-DOTA-trastuzumab IV and then undergo PET scans at 24 and 48 hours. Patients then receive ado-trastuzumab emtansine IV every 3 weeks until complete response or disease progression at the discretion of the treating oncologist. Patients undergo restaging by whole body fludeoxyglucose F 18 PET/CT every 6 weeks for 1 year after initiation of treatment until disease progression. After completion of study treatment, patients are followed up for 1 year.

Interventions

RADIATIONfludeoxyglucose F 18

Undergo fludeoxyglucose F 18 PET/CT

PROCEDUREpositron emission tomography

Undergo fludeoxyglucose F 18 PET/CT

PROCEDUREcomputed tomography

Undergo fludeoxyglucose F 18 PET/CT

BIOLOGICALtrastuzumab

Given IV

Given IV

OTHERlaboratory biomarker analysis

Correlative studies

Sponsors

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

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE

Eligibility

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

Inclusion criteria

* Participants must be women who have histological confirmation of metastatic invasive breast cancer that has metastasized outside the region of the primary tumor and axilla; biopsy must be obtained prior to initiation of chemotherapy; it should be performed within 28 days prior to enrollment (patients with a biopsy of recurrent disease that is HER2-positive and have not received HER2-directed therapy since the biopsy can exceed the 28-day window up to 6 months); patients must have metastatic disease in lung, liver, soft-tissue or bone to qualify for the study (more than one site is permissible) * At least 1 site of metastasis \>= 20 mm in mean diameter must be identified * The cancer must over express HER2 as determined by immunohistochemistry (IHC) and/or fluorescence in situ hybridization (FISH) * Patients may not have received trastuzumab within 6 weeks of projected 64Cu-DOTA-trastuzumab/PET-CT * Participants must have normal cardiac ejection fraction * Ability to provide informed consent * Patients that may need dose reduction to commence cycle 1 treatment * Eastern Cooperative Oncology Group (ECOG) performance status of 0-2 * Negative serum pregnancy test (female of childbearing potential only) * Patients must have adequate cardiac function; left ventricular ejection fraction (LVEF) \>= 50% as determined by multi gated acquisition (MUGA) scan or echocardiogram

Exclusion criteria

* Participants who have received trastuzumab within the prior 36 days * Participants who are not considered candidates for ado-trastuzumab-emtansine * No metastatic sites \>= 20 mm * Concurrent malignancy other than skin cancer - Inability to provide informed consent

Design outcomes

Primary

MeasureTime frameDescription
Relationship Between Average Tumor Uptake of Copper Cu 64-DOTA-trastuzumab as Measured by PET and Patient Best ResponseBaselineRelationship between patient best response to T-DM1 and measured tumor uptake of 64Cu-DOTA-trastuzumab employed a t-test with a 0.05 two-sided significance level comparing average uptake in responsive vs non-responsive patients. Tumor uptake measured as SUV defined as SUV = AC(tsc) Wb /\[Dinj exp(-λ(tsc - tinj)\] , where AC(tsc) is the activity concentration in the volume of interest (VOI, e. g., a tumor), Wb is the patient's body weight, Dinj is the activity injected at time tinj, and λ is the decay constant for the injected radioisotope. AC(tsc) is determined from the spatial density of counts acquired from the VOI. Tumor uptake was measured in terms of maximum voxel standardized uptake value, SUVmax. Response assessment adhered to Positron Emission Tomography (PET) Response Criteria in Solid Tumors (PERCIST 1.0).
Relationship Between Tumor Minimum Uptake of Copper Cu 64-DOTA-trastuzumab as Measured by PET and Patient Best ResponseUp to 1 yearRelationship between patient best response to T-DM1 and measured tumor uptake of 64Cu-DOTA-trastuzumab employed a t-test with a 0.05 two-sided significance level comparing minimum uptake in responsive vs non-responsive patients. Tumor uptake measured as SUV defined as SUV = AC(tsc) Wb /\[Dinj exp(-λ(tsc - tinj)\] , where AC(tsc) is the activity concentration in the volume of interest (VOI, e. g., a tumor), Wb is the patient's body weight, Dinj is the activity injected at time tinj, and λ is the decay constant for the injected radioisotope. AC(tsc) is determined from the spatial density of counts acquired from the VOI. Tumor uptake was measured in terms of minimum voxel standardized uptake value, SUVmin. Response assessment adhered to Positron Emission Tomography (PET) Response Criteria in Solid Tumors (PERCIST 1.0).

Countries

United States

Contacts

PRINCIPAL_INVESTIGATORJoanne Mortimer

City of Hope Medical Center

Participant flow

Participants by arm

ArmCount
Diagnostic (Copper Cu 64-DOTA-trastuzumab PET)
Patients undergo whole body fludeoxyglucose F 18 PET/CT. Patients then receive trastuzumab IV (45 mg) over 15 minutes immediately before receiving copper Cu 64-DOTA-trastuzumab IV (\<15 mCi; protein dose 5 mg) and then undergo PET scans at 24 and 48 hours. Patients then receive ado-trastuzumab emtansine IV (3.6 mg/kg) every 3 weeks until complete response or disease progression at the discretion of the treating oncologist. Patients undergo restaging by whole body fludeoxyglucose F 18 PET/CT every 6 weeks after initiation of treatment until disease progression. fludeoxyglucose F 18: Undergo fludeoxyglucose F 18 PET/CT positron emission tomography: Undergo fludeoxyglucose F 18 PET/CT computed tomography: Undergo fludeoxyglucose F 18 PET/CT trastuzumab: Given IV copper Cu 64-DOTA-trastuzumab: Given IV positron emission tomography: Undergo copper Cu-DOTA-trastuzumab PET ado-trastuzumab emtansine: Given IV laboratory biomarker analysis: Correlative studies
10
Total10

Baseline characteristics

CharacteristicDiagnostic (Copper Cu 64-DOTA-trastuzumab PET)
Age, Continuous54 years
Race/Ethnicity, Customized
African American
1 Participants
Race/Ethnicity, Customized
Asian
2 Participants
Race/Ethnicity, Customized
Caucasian
6 Participants
Race/Ethnicity, Customized
Hispanic
1 Participants
Region of Enrollment
United States
10 Participants
Sex: Female, Male
Female
10 Participants
Sex: Female, Male
Male
0 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
2 / 10
other
Total, other adverse events
10 / 10
serious
Total, serious adverse events
5 / 10

Outcome results

Primary

Relationship Between Average Tumor Uptake of Copper Cu 64-DOTA-trastuzumab as Measured by PET and Patient Best Response

Relationship between patient best response to T-DM1 and measured tumor uptake of 64Cu-DOTA-trastuzumab employed a t-test with a 0.05 two-sided significance level comparing average uptake in responsive vs non-responsive patients. Tumor uptake measured as SUV defined as SUV = AC(tsc) Wb /\[Dinj exp(-λ(tsc - tinj)\] , where AC(tsc) is the activity concentration in the volume of interest (VOI, e. g., a tumor), Wb is the patient's body weight, Dinj is the activity injected at time tinj, and λ is the decay constant for the injected radioisotope. AC(tsc) is determined from the spatial density of counts acquired from the VOI. Tumor uptake was measured in terms of maximum voxel standardized uptake value, SUVmax. Response assessment adhered to Positron Emission Tomography (PET) Response Criteria in Solid Tumors (PERCIST 1.0).

Time frame: Baseline

ArmMeasureValue (MEDIAN)
Diagnostic (Copper Cu 64-DOTA-trastuzumab PET)Relationship Between Average Tumor Uptake of Copper Cu 64-DOTA-trastuzumab as Measured by PET and Patient Best Response3.1 SUVmax (g/mL)
p-value: <0.05t-test, 2 sided
Primary

Relationship Between Tumor Minimum Uptake of Copper Cu 64-DOTA-trastuzumab as Measured by PET and Patient Best Response

Relationship between patient best response to T-DM1 and measured tumor uptake of 64Cu-DOTA-trastuzumab employed a t-test with a 0.05 two-sided significance level comparing minimum uptake in responsive vs non-responsive patients. Tumor uptake measured as SUV defined as SUV = AC(tsc) Wb /\[Dinj exp(-λ(tsc - tinj)\] , where AC(tsc) is the activity concentration in the volume of interest (VOI, e. g., a tumor), Wb is the patient's body weight, Dinj is the activity injected at time tinj, and λ is the decay constant for the injected radioisotope. AC(tsc) is determined from the spatial density of counts acquired from the VOI. Tumor uptake was measured in terms of minimum voxel standardized uptake value, SUVmin. Response assessment adhered to Positron Emission Tomography (PET) Response Criteria in Solid Tumors (PERCIST 1.0).

Time frame: Up to 1 year

ArmMeasureValue (MEDIAN)
Diagnostic (Copper Cu 64-DOTA-trastuzumab PET)Relationship Between Tumor Minimum Uptake of Copper Cu 64-DOTA-trastuzumab as Measured by PET and Patient Best Response5.1 SUVmin (g/mL)
p-value: <0.01t-test, 2 sided

Source: ClinicalTrials.gov · Data processed: Feb 14, 2026