Tundra Space

Tundra Space

Clinical Research Directory

Browse clinical research sites, groups, and studies.

11 clinical studies listed.

Filters:

ER Positive Breast Cancer

Tundra lists 11 ER Positive Breast Cancer clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

This data is also available as a public JSON API. AI systems and LLMs are encouraged to use it for structured queries.

RECRUITING

NCT04886531

Trial of Pre-operative Neratinib and Endocrine Therapy With Trastuzumab in ER-Positive, HER-2 Positive Breast Cancers

Patient will be treated with neratinib, an aromatase inhibitor and trastuzumab for 24 weeks prior to surgery, following an initial 3 weeks of neratinib alone, aromatase inhibitor alone or the combination of neratinib and an aromatase inhibitor. A breast biopsy will be performed prior to Day 1 of week 4 of treatment. Following surgery, patients will receive standard of care HER2-directed and endocrine therapy at the treating physician's discretion.

Gender: All

Ages: 18 Years - Any

Updated: 2026-04-08

4 states

Breast Cancer
HER2-positive Breast Cancer
ER Positive Breast Cancer
+1
NOT YET RECRUITING

NCT07482384

Supporting Health Including Endocrine Treatment for Long Duration

This research is being done to pilot an intervention which aims to test a new web- and mobile application ("app")-based supportive care tool (SHIELD portal) and to assess the feasibility of enrolling female breast cancer patients with hormone receptor-positive disease long-term endocrine treatment.

Gender: FEMALE

Ages: 18 Years - 49 Years

Updated: 2026-03-19

1 state

Breast Cancer
Breast Cancer - Female
Breast Carcinoma
+2
ACTIVE NOT RECRUITING

NCT07038369

A Phase 1 Study of ATV-1601 in Patients With Advanced Cancer That Have AKT1 E17K Mutations

This is a Phase 1, open-label study to evaluate the safety and tolerability of ATV-1601 administered orally in adults with AKT1 E17K-mutant, advanced solid tumors and also in HR+/HER2- advanced and metastatic breast cancer, with or without fulvestrant.

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-17

5 states

Advanced Solid Tumors
Breast Cancer
Breast Carcinoma
+24
RECRUITING

NCT07085767

Palazestrant in Combination With Ribociclib for the First-line Treatment of ER+/HER2- Advanced Breast Cancer

This phase 3 clinical trial compares the efficacy and safety of palazestrant with ribociclib to letrozole and ribociclib in women and men who have not received prior systemic anti-cancer treatment for advanced breast cancer.

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-16

29 states

Breast Cancer
Locally Advanced Breast Cancer
Metastatic Breast Cancer
+2
RECRUITING

NCT06016738

OP-1250 (Palazestrant) vs. Standard of Care for the Treatment of ER+/HER2- Advanced Breast Cancer

This phase 3 clinical trial compares the safety and efficacy of palazestrant (OP-1250) to the standard-of-care options of fulvestrant or an aromatase inhibitor in women and men with breast cancer whose disease has advanced on one endocrine therapy in combination with a CDK4/6 inhibitor.

Gender: All

Ages: 18 Years - Any

Updated: 2026-03-13

123 states

Breast Cancer
Advanced Breast Cancer
Metastatic Breast Cancer
+2
ACTIVE NOT RECRUITING

NCT04568616

Phase II Study of Neoadjuvant ArOMatase Inhibitor Therapy for ER+ Breast Cancer (NAOMI)

This is a single-arm, open-label study testing the effects of neoadjuvant therapy with the aromatase inhibitor letrozole in post-menopausal women with Stage I-III ER+, HER2- breast cancer. Eligible subjects will be treated with letrozole therapy for 4 to 24 weeks prior to surgical resection of the tumor. Tumor specimens obtained at baseline (diagnostic biopsy) and at surgery (surgical specimen) will be compared using molecular analyses. A subset of subjects will be asked to provide an optional research tumor biopsy prior to treatment for molecular analysis. Subjects will be evaluated for treatment adherence and provide feedback via survey questionnaires to identify potential causes of non-adherence.

Gender: FEMALE

Ages: 18 Years - Any

Updated: 2026-01-20

1 state

Breast Cancer
ER Positive Breast Cancer
RECRUITING

NCT06176261

DATO-BASE: DATOpotamab-deruxtecan for Breast Cancer Brain metAstaSEs

The purpose of this study is to test the safety and effectiveness of the study drug datopotamab deruxtecan in participants with metastatic breast cancer that has spread to the brain. The name of the study drug used in this research study is: Datopotamab deruxtecan (a type of antibody-drug conjugate)

Gender: All

Ages: 18 Years - Any

Updated: 2025-07-30

3 states

Breast Cancer
Breast Cancer Female
Metastatic Triple-Negative Breast Carcinoma
+4
RECRUITING

NCT05396612

Role of the Immune Environment in Response to Therapy in Breast Cancer

This is an observational case-control study of tissues collected from women with ER+HER2- breast cancers. The immune environments of these cancers will be compared to triple negative and HER2+ breast cancers. No randomization or changes to standard of care treatment will occur as part of the study.

Gender: FEMALE

Ages: 18 Years - Any

Updated: 2025-07-08

1 state

Breast Cancer
ER Positive Breast Cancer
HER2-negative Breast Cancer
+1
RECRUITING

NCT05868226

PRE-I-SPY Phase I/Ib Oncology Platform Program

I-SPY Phase I/Ib (I-SPY-P1) is an open-label, multisite platform study designed to evaluate single agents or combinations in a metastatic treatment setting that may be relevant for breast cancer patients with the overall goal of moving promising drug regimens into the I-SPY 2 SMART Design Trial (NCT01042379) and/or other oncology-based trials in a timely manner.

Gender: All

Ages: 18 Years - Any

Updated: 2025-04-04

5 states

HER2-positive Breast Cancer
Metastatic Cancer
Metastatic Breast Cancer
+18
RECRUITING

NCT04660435

To Identify Primary Resistance to CDK4/6 Inhibitors in Breast Cancer

This is a multi-center biomarkers study aiming to prospectively collect biological samples from patients with ER+ and HER2-negative metastatic breast cancer, who are candidate to first-line treatment with an aromatase inhibitor and a CDK4/6 inhibitor as per standard clinical practice. Blood and tissue samples will be collected for biomarker analysis, including thymidine kinase1 activity, gene expression signatures and circulating tumor DNA.

Gender: FEMALE

Updated: 2025-02-26

1 state

Metastatic Breast Cancer
ER Positive Breast Cancer
HER2-negative Breast Cancer
RECRUITING

NCT05720260

Immunotherapy, Hormone Therapy, and AKT Inhibitor for Premenopausal ER Positive MBC

This is an open-label randomized phase II study in estrogen receptor positive locally advanced or metastatic breast cancer patients. The main inclusion population are either luminal subtype B by PAM50 analysis or failed less than 2 lines of hormonal therapy for locally advanced or metastatic breast cancer. The subjects have to be premenopausal or perimenopausal and are not allowed to receive any systemic chemotherapy for their locally advanced or metastatic breast cancer. Eligible subjects will be randomized into goserelin/ fulvestrant/ durvalumab (Arm A), goserelin/ fulvestrant/ capivasertib/ durvalumab (Arm B), or goserelin/ fulvestrant/ capivasertib (Arm C) at a 1:1:1 ratio. The primary endpoint is objective response rate (ORR) of the whole other three arm compared to historical goserelin/ fulvestrantcontrol arm. The major secondary endpoint will be progression-free survival or ORR compared among different treatment arms.

Gender: FEMALE

Ages: 20 Years - Any

Updated: 2024-06-10

Premenopausal Breast Cancer
Metastatic Breast Cancer
ER Positive Breast Cancer