Biomarkers to Detect Endocrine Therapy Resistance

NCT ID: NCT06067503

Last Updated: 2025-04-22

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE2

Total Enrollment

8 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-04-30

Study Completion Date

2026-08-31

Brief Summary

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This pilot observational study is being done to identify possible biomarkers of response to endocrine therapy in patients with ER/PR+ metastatic lobular breast cancer (LBC) starting new endocrine therapy. 18F-fluorofuranylnorprogesterone Positron Emission Tomography/Computed Tomography (FFNP-PET/CT) and liquid biopsies will be performed at baseline and after 4 weeks of treatment. Baseline levels and dynamic on-treatment changes in estrogen signaling as measured by FFNP-PET/CT and circulating tumor cell (CTC) liquid biopsy will be correlated with clinical response to endocrine therapy and progression-free survival in the above cohort of patients.

Detailed Description

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Conditions

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Metastatic Cancer Breast Cancer Lobular Breast Carcinoma

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

NONE

Study Groups

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Participants with ER/PR+ metastatic lobular breast cancer (LBC)

Group Type EXPERIMENTAL

18F-fluorofuranylnorprogesterone

Intervention Type DRUG

The dose of the investigational imaging agent, FFNP, is approximately 7 millicurie (mCi) (259 megabecquerels (MBq)), IV slow infusion over approximately two minutes followed by saline flush.

Liquid Biopsy

Intervention Type DEVICE

20ml of whole blood will be collected into two Ethylenediaminetetraacetic acid (EDTA) tubes at each timepoint, CTCs are isolated using the microfluidic Versatile Exclusion-based Rare Sample Analysis (VERSA) platform that integrates CTC capture with RNA extraction on a single chip using Exclusion-Based Sample Preparation (ESP) technology

Positron Emission Tomography/Computed Tomography

Intervention Type DEVICE

FFNP drug in combination with PET/CT scans to image participant

Interventions

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18F-fluorofuranylnorprogesterone

The dose of the investigational imaging agent, FFNP, is approximately 7 millicurie (mCi) (259 megabecquerels (MBq)), IV slow infusion over approximately two minutes followed by saline flush.

Intervention Type DRUG

Liquid Biopsy

20ml of whole blood will be collected into two Ethylenediaminetetraacetic acid (EDTA) tubes at each timepoint, CTCs are isolated using the microfluidic Versatile Exclusion-based Rare Sample Analysis (VERSA) platform that integrates CTC capture with RNA extraction on a single chip using Exclusion-Based Sample Preparation (ESP) technology

Intervention Type DEVICE

Positron Emission Tomography/Computed Tomography

FFNP drug in combination with PET/CT scans to image participant

Intervention Type DEVICE

Other Intervention Names

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FFNP Circulating Tumor Cells (CTC) PET/CT

Eligibility Criteria

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Inclusion Criteria

1. Willing to provide informed consent
2. Individuals at least 18 years of age
3. Have biopsy-proven ER/PR-positive (defined as ER ≥1 percent and PR ≥1 percent by IHC) and HER2-negative advanced or metastatic LBC starting new standard of care endocrine therapy
4. Adequate organ function as indicated by standard laboratory tests (CBC, liver function tests or CMP) allowing for systemic breast cancer treatment per treating oncologist
5. Patients with evaluable bone-only disease that is lytic or mixed lytic-sclerotic are eligible
6. Willing to comply with all study procedures and be available for the duration of the study
7. Disease may be measurable by RECIST 1.1 criteria or non-measurable. Lesion size must be at least 1cm. If only bone lesions present, they should be lytic or mixed lytic-sclerotic. If only liver lesions present, patient is not eligible.

Exclusion Criteria

1. Patients with active brain metastases
2. Patients with liver-only disease are not eligible due to high background liver activity related to the radiopharmaceutical's hepatobiliary route of elimination
3. Unable to lie flat during or tolerate PET/CT
4. Patients with a history of allergic reaction attributable to compounds of similar chemical or biologic composition to FFNP
5. Presence of liver failure as judged by patient's treating physician
6. Individuals who are pregnant, lactating, or planning on becoming pregnant during the study
7. Not suitable for study participation due to other reasons at the discretion of the investigators
8. Patients with progesterone-receptor negative disease defined as PR \<1 percent by IHC
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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University of Wisconsin, Madison

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Marina Sharifi, MD, PHD

Role: PRINCIPAL_INVESTIGATOR

UW Carbone Cancer Center

Locations

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UW Carbone Cancer Center

Madison, Wisconsin, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Cancer Connect

Role: CONTACT

800-622-8922

Other Identifiers

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Protocol Version 10/2/2023

Identifier Type: OTHER

Identifier Source: secondary_id

SMPH/MEDICINE/HEM-ONC

Identifier Type: OTHER

Identifier Source: secondary_id

UW23076

Identifier Type: OTHER

Identifier Source: secondary_id

2023-1103

Identifier Type: -

Identifier Source: org_study_id

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