89Zr-atezolizumab PET Scan and Lobular Breast Cancer

Not Applicable

Terminated

• Conditions: Lobular Metastatic Breast Cancer
• Interventions: Other: 89Zr-atezolizumab PET scans

• Registration Number: NCT04222426
• Lead Sponsor: University Medical Center Groningen

Brief Summary

The exploratory single center feasibility ImaGelato study is conducted as an imaging side study to the Dutch GELATO trial (Assessing efficacy of carboplatin and atezolizumab in metastatic lobular breast cancer). Ten patients with lobular metastatic breast cancer, who are included in the GELATO trial at the UMCG, are eligible for the ImaGelato study.

All patients will undergo two Zirconium-89 (89Zr)-atezolizumab positron emission tomography (PET) scans, one at baseline and one after two doses carboplatin induction treatment. The 89Zr-atezolizumab PET scan will be performed 4 days after tracer injection. Procedures within the ImaGelato study will be completed after the two 89Zr-atezolizumab PET scans, but patients will continue treatment with carboplatin combined with atezolizumab in the GELATO trial.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2019-04-23
• Study Start: 2019-12-18
• Study First Submitted QC: 2020-01-07
• Study First Posted: 2020-01-10
• Primary Completion: 2022-05-01
• Study Completion: 2022-05-01
• Status Verified: 2022-06
• Last Update Submitted: 2022-06-27
• Last Update Posted: 2022-07-01

Recruitment & Eligibility

• Status: TERMINATED
• Sex: Female
• Target Recruitment: 1

Inclusion Criteria

1. A patient must meet the inclusion criteria of the GELATO trial
2. Able to give written informed consent and to comply with the ImaGelato protocol

Exclusion Criteria

1. Contra-indication for 89Zr-atezolizumab PET scan
2. Any approved anti-cancer therapy, including chemotherapy or hormonal therapy within ≤14 days prior to the first 89Zr-atezolizumab injection. Treatment with any other investigational agent or participation in another clinical trial with therapeutic intent within 28 days prior to the first 89Zr-atezolizumab injection.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
89Zr-atezolizumab PET scan	89Zr-atezolizumab PET scans	All patients will undergo two 89Zr-atezolizumab PET scans, one at baseline and one after two doses carboplatin induction treatment. The 89Zr-atezolizumab PET scan will be performed 4 days after tracer injection. Procedures within the ImaGelato study will be completed after the two 89Zr-atezolizumab PET scans, but patients will continue treatment with carboplatin combined with atezolizumab in the GELATO trial.

Primary Outcome Measures

Name	Time	Method
Change in tumor uptake between 89Zr-atezolizumab PET scan at baseline and after two carboplatin induction treatments, defined as decline or increase of standardized uptake value	2 years	Change in tumor uptake between 89Zr-atezolizumab PET scan at baseline and after two carboplatin induction treatments, defined as decline or increase of standardized uptake value (SUV) of 30% or more, described as per lesion and per patient. For the two different time points we will calculate the SUV for all lesions and patients. Relative decrease or increase in SUV units between different time points will be calculated for all lesions and patients, and recorded as percentage of SUV decrease or increase.

Secondary Outcome Measures

Name	Time	Method
The relation between standardized uptake value (SUV) on 89Zr-atezolizumab PET scan, to response to carboplatin-atezolizumab	2 years	Relation of 89Zr-atezolizumab tumor uptake (at baseline, after carboplatin induction, and change between the two scans) per lesion and per patient with response to carboplatin-atezolizumab per lesion and per patient. For the 89Zr-atezolizumab PET scans, uptake will be quantified with SUV units for both time points.
The relation of 89Zr-atezolizumab tumor uptake at baseline and after two courses of carboplatin, with tumor biopsy assessments	2 years	Relation of 89Zr-atezolizumab tumor uptake at baseline and after carboplatin induction, with tumor biopsy assessments (for example PD-L1 immunohistochemistry (IHC)). We will investigate whether PD-L1 expression is associated with 89Zr-atezolizumab uptake. The relationship between tumor PD-L1 expression (measured in pre-treatment biopsy and induction treatment biopsy), and 89Zr-atezolizumab tumor uptake will be described.

Trial Locations

Locations (1)

University Medical Center Groningen; 🇳🇱 Groningen, Netherlands