Evaluation of PSMA in HER2- AR+ Metastatic Breast Cancer
The purpose of this research is to determine the expression of prostate specific membrane antigen (PSMA) in human epidermal growth factor receptor 2 (HER2)-negative, androgen receptor (AR)-positive metastatic breast cancer, and to determine its role in resistance to the anti-androgen, bicalutamide. The investigators hypothesize that PSMA expression will correlate with resistance to anti-androgen therapies, as has been documented in prostate cancer, and this can be used to select patients most likely to benefit…
Conditions studied
Breast Cancer, HER2-negative Breast Cancer, Metastatic Breast Cancer
About this study
The purpose of this research is to determine the expression of prostate specific membrane antigen (PSMA) in human epidermal growth factor receptor 2 (HER2)-negative, androgen receptor (AR)-positive metastatic breast cancer, and to determine its role in resistance to the anti-androgen, bicalutamide. The investigators hypothesize that PSMA expression will correlate with resistance to anti-androgen therapies, as has been documented in prostate cancer, and this can be used to select patients most likely to benefit from these therapies in future clinical trials. 15 people with HER2-negative, AR-positive metastatic breast cancer will be enrolled and be on study for about 3 days.
Interventions
- Drug: 18F-DCFPyL — PSMA is highly expressed on prostate cancer and is associated with metastasis and resistance to anti-androgen therapies. Researchers have evaluated the expression of PSMA in the tumor and tumor-associated neovasculature in primary tumors and distant metastases in patients with breast cancer.
Primary outcomes
- PSMA Expression as measured by 18F-DCFPyL SUV (up to 3 days)
Eligibility information
Study locations
- University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53705 United States
Source: ClinicalTrials.gov. Record last refreshed by Varda Clinical: 2026-09-27.