Ignite Creation Date:
2025-12-24 @ 9:59 PM
Ignite Modification Date:
2026-02-25 @ 5:44 PM
Study NCT ID:
NCT02697032
Status:
COMPLETED
Last Update Posted:
2019-11-27
First Post:
2015-08-25
Is NOT Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
FDHT PET and Bicalutamide in Metastatic Breast Cancer
Sponsor:
University Medical Center Groningen
Organization:
Study Overview
Official Title:
FDHT-PET to Visualize the Effect on the Androgen Receptor Level by Bicalutamide
Status:
COMPLETED
Status Verified Date:
2019-11
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
Rationale: The purpose is to evaluate whether non-invasive in vivo imaging of androgen receptor (AR) presence in metastatic breast cancer patients by means of 18F-fluoro-dihydrotestosterone positron emission tomography (FDHT-PET) can be used to predict (early) treatment response to, and optimal dosing of, the anti androgen bicalutamide. The ultimate goal is to contribute to optimal selection of breast cancer patients for anti androgen treatment. Objective: Feasibility to detect a diffrence in uptake on 18F-FDHT scan after 6 weeks of treatment with bicalutamide in metastatic breast cancer patients. Secondary Objectives: to describe whether changes in 18F-FDHT tracer uptake after six weeks associates with response to bicalutamide, to describe whether changes in AR availability are different for breast cancer subgroups during treatment with bicalutamide and to describe whether 18F-FDHT tracer uptake is influenced by the amount of AR tumor expression. Study design: This is a single arm, one stage feasibility study, which will be executed in the University Medical Center Groningen, The Netherlands. The primary endpoint of the study is to evaluate the difference in 18F-FDHT uptake in tumor lesions after 6 weeks of bicalutamide treatment in patients with AR-positive metastatic breast cancer. Patients will be treated with bicalutamide until progression or unacceptable toxicity is encountered. Study population: The investigators will include 20 postmenopausal metastatic breast cancer patients with an AR positive, HER2 negative tumor. Patients should be restaged clinically with bone scintigraphy and CT scan within a 6 week timeframe of the PET examinations. Intervention: All patients will receive a baseline FDHT-PET scan and start with bicalutamide treatment 150mg daily. During follow-up patients will receive one FDHT-PET scan after 6 weeks. Treatment with bicalutamide will continue until progression or unacceptable toxicity is encountered. Main study endpoint: The percent difference in 18F-FDHT uptake in tumor lesions after 6 weeks of monotherapy bicalutamide. A minimum decrease of 20% in 18F-FDHT uptake after 6 weeks compared to baseline uptake with an α of 0.05 and a power of 80%, is considered clinical significant.
Detailed Description:
None
Study Oversight
Has Oversight DMC:
True
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?: