CI

At a glance

ClinicalIndex Comparison Record
Phase 2Active· 8 enrolled
Drug / intervention
Therapeutic Estradiol +4 morebiological
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT03941730
NCT03941730Phase 2Active

Therapeutic Targeting of ER Beta in Triple Negative Breast Cancer

Mayo Clinic·interventional·Posted May 8, 2019·Updated May 12, 2026

In Brief

A Phase 2 clinical trial evaluating Biopsy, Computed Tomography, and 3 other interventions for Advanced Triple-Negative Breast Carcinoma and 4 related conditions. Active but no longer recruiting, targeting 8 participants across 9 sites.

Detailed Summary

This phase II trial studies how well estradiol works in treating patients with estrogen receptor beta (ER beta) positive, triple negative breast cancer that has spread to nearby tissue or lymph nodes (locally advanced) or other places in the body (metastatic). Hormone receptors like ER beta allow the body to respond appropriately to hormones. Triple negative means that the breast cancer does not express other hormone receptors called ER alpha, progesterone, and HER2. In some people with triple negative breast cancer, ER beta is overexpressed. Tumor cells that overexpress ER beta grow slower in the laboratory and this growth is slowed in the presence of estrogen. Estradiol is a form of estrogen. This study may help doctors determine whether tumor cells that overexpress ER beta shrink in the presence of estradiol.

Study Details

Timeline

Phase 2Active
20202021202220232024202520262027
First PostedMay 8, 2019
Enrollment StartAug 28, 2019
Primary CompletionJul 29, 2024
Study CompletionDec 31, 2026
TodayJul 2, 2026
Enrollment to primary: 4.9 yearsPosted 7.1 years ago

Interventions

Biopsyprocedure

Undergo tissue biopsy

Computed Tomographyprocedure

Undergo CT

Magnetic Resonance Imagingprocedure

Undergo MRI

Positron Emission Tomographyprocedure

Undergo PET

Therapeutic Estradiolbiological

Given PO