Utvärdering av PSMA vid HER2-AR+ metastaserad bröstcancer
Utvärdering av prostataspecifikt membranantigen (PSMA) i HER2-negativ, androgenreceptor (AR)-positiv metastaserad bröstcancer med 18F-DCFPyL PSMA-baserad PET/CT
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.
Studieöversikt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljerad beskrivning
Primary Objective:
- To evaluate the expression of PSMA via 18F-DCFPyL PSMA-based PET/CT in patients with metastatic HER2-negative, AR-positive breast cancer. Expression of PSMA will be quantified using PSMA-based PET imaging using a novel agent, 18F-DCFPyL, as a non-invasive imaging biomarker of tumor neovasculature in HER2-negative, AR-positive metastatic breast cancer.
Secondary Objectives:
- PSMA PET will be compared with the expression of PSMA in CTCs and diagnostic metastatic tissue from patients with HER2-negative, AR-positive metastatic breast cancer.
- PSMA expression will be correlated with clinical benefit (objective response and progression-free survival) to bicalutamide and ribociclib for patients enrolled in NCT03090165.
Studietyp
Studietyp
Inskrivning (Faktisk)
Inskrivning
Fas
Fas
- Fas 2
Kontakter och platser
Studieorter
-
-
Wisconsin
-
Madison, Wisconsin, Förenta staterna, 53705
- University of Wisconsin School of Medicine and Public Health
-
-
Deltagandekriterier
Urvalskriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Beskrivning
Inclusion Criteria:
- Patients diagnosed with metastatic HER2-negative breast cancer AR expression of ≥ 10%
Exclusion Criteria:
- Other (non-breast) known active malignancy. Participants with previously treated cancers which are in remission or have no evidence of disease are eligible.
- Unable to lie flat during or tolerate PET/CT
- Participants with any medical condition or other circumstances that, in the opinion of the investigator, compromise the safety or compliance of the subject to produce reliable data or completing the study
- Women of childbearing potential must not be pregnant or breast feeding (pregnancy test negative within 7 days prior to PET/CT
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Diagnostisk
- Tilldelning: N/A
- Interventionsmodell: Enskild gruppuppgift
- Maskning: Ingen (Open Label)
Antal vapen
Vapen och interventioner
Deltagargrupp / ArmDeltagargrupp / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Experimentell: 18F-DCFPyL PSMA-based PET/CT
|
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. |
Vad mäter studien?
Primära resultatmått
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
PSMA Expression as measured by 18F-DCFPyL SUV
Tidsram: up to 3 days
|
Quantitative analysis of 18F-DCFPyL PSMA PET uptake will be performed at the lesion-level. Standardized uptake values (SUV) will be measured by manually drawing a region of interest (ROI) to encompass the entire lesion guided by the lesion extent visualized on conventional imaging. PET SUV based quantitative tumor uptake parameters will be obtained. |
up to 3 days
|
Sekundära resultatmått
Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Expression of PSMA in CTCs
Tidsram: up to 2 weeks
|
Expression of PSMA in CTCs will be measured via immunofluorescence. |
up to 2 weeks
|
|
Expression of PSMA in diagnostic metastatic tissue
Tidsram: up to 3 days
|
PSMA expression in tumors will be semi-quantitatively scored by a study pathologist using published methods including separate assessment of tumor-associated and non-tumor vasculature, with the endothelium highlighted by a CD31 immunostain to facilitate definitive recognition. |
up to 3 days
|
|
Change in PSMA Expression on CTCs after 2 weeks of bicalutamide
Tidsram: baseline and up to 2 weeks
|
The change in PSMA expression on CTCs will be measured pre and post treatment via immunofluorescence. |
baseline and up to 2 weeks
|
Samarbetspartners och utredare
Sponsor
Sponsor
Utredare
Utredare
- Huvudutredare: Amy Fowler, MD, PhD, University of Wisconsin, Madison
Studieavstämningsdatum
Studera stora datum
Studiestart (Faktisk)
Studiestart
Primärt slutförande (Faktisk)
Primärt slutförande
Avslutad studie (Faktisk)
Avslutad studie
Studieregistreringsdatum
Först inskickad
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Första postat
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste uppdatering publicerad
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Senast verifierad
Mer information
Termer relaterade till denna studie
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
Andra studie-ID-nummer
- 2020-0949
- A539300 (Annan identifierare: UW Madison)
- SMPH/RADIOLOGY/RADIOLOGY (Annan identifierare: UW Madison)
- NCI-2020-07434 (Registeridentifierare: NCI CTRP)
- 2020-0949 (Annan identifierare: UW Madison)
- Protocol Version 12/12/2025 (Annan identifierare: UW Madison)
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