Clinical Research Directory
Browse clinical research sites, groups, and studies.
79 clinical studies listed.
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Tundra lists 79 HER2-negative Breast Cancer clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.
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NCT06774027
Prospective Registry of ADC as First- and Second-line Treatment for Breast Cancer
Antibody-drug conjugates (ADCs) have demonstrated substantial improvement in progression free survival (PFS) and overall survival (OS) in phase III clinical trials in patients with metastatic triple negative breast cancer (mTNBC) and hormone receptor positive/HER2 negative (HR+/HER2-) metastatic breast cancer (MBC), offering an effective new treatment strategy. Several outstanding questions drive the decision to use ADC drugs clinically. This is a prospective, multi-site observational study of patients with metastatic breast cancer (mBC) who are being treated with FDA-approved antibody drug conjugates (ADCs) as part of routine care and aims to collect real-world data to evaluate the impact of ADC treatment as part of routine care.
Gender: All
Ages: 18 Years - Any
Updated: 2026-10-16
3 states
NCT05524584
Anastrazole, Fulvestrant & Abemaciclib for HR+HER2- Metastatic Breast Cancer
This is a phase 2, open-label, singled-arm clinical trial determining efficacy of combination therapy with anastrozole, fulvestrant and abemaciclib in subjects with breast cancer. These are subjects who are newly diagnosed advanced or metastatic hormone receptor positive breast cancer or subjects who have progressed following treatment free interval of more than 12 months following adjuvant or neoadjuvant treatment.
Gender: All
Ages: 18 Years - Any
Updated: 2026-10-15
1 state
NCT06120283
BGB-43395 Alone or as Part of Combination Therapies in Participants With Breast Cancer and Other Advanced Solid Tumors
This is a dose escalation and dose expansion study to compare how well BGB-43395, a selective cyclin-dependent kinase 4 (CDK4) inhibitor, works as monotherapy or in combination with fulvestrant, letrozole, or elacestrant in participants with hormone receptor positive (HR+) and human epidermal growth factor 2 negative (HER2-) breast cancer (BC) and other advanced solid tumors. The main purpose of this study is to explore the recommended dosing for BGB-43395.
Gender: All
Ages: 18 Years - Any
Updated: 2026-10-15
24 states
NCT05512364
Elacestrant for Treating ER+/HER2- Breast Cancer Patients With ctDNA Relapse (TREAT ctDNA)
This is an international, multi-center, randomised, open label, superiority phase III trial of elacestrant vs standard endocrine therapy in patients with ER+/HER2- breast cancer and ctDNA relapse. During the ctDNA screening phase, patients will be tested at different timepoints to detect the presence of ctDNA in their blood. Patients who are found to be ctDNA-positive and have no evidence of distant metastasis, will be randomised 1:1 between standard endocrine treatment (the same they were receiving when tested ctDNA positive) versus elacestrant, provided they meet all eligibility criteria. After completion of the protocol treatment period, treatment will be left at the discretion of the treating physician.
Gender: All
Ages: 18 Years - Any
Updated: 2026-10-07
NCT06590857
Trial of 225Ac-DOTATATE (RYZ101) in Subjects With ER+, HER2-negative Unresectable or Metastatic Breast Cancer Expressing SSTRs.
Phase 1b/2 open-label trial of 225Ac-DOTATATE (RYZ101) in subjects with ER+, HER2-negative unresectable or metastatic breast cancer expressing SSTRs.
Gender: All
Updated: 2026-10-06
23 states
NCT06568692
A Phase 2 Study of PCS6422 With Capecitabine in Patients With Advanced or Metastatic Breast Cancer
This is an adaptive Phase 2, open-label, randomized, multi-center study evaluating up to 2 regimens of PCS6422 with capecitabine (Cap) vs. standard dose of Cap alone in patients with advanced or metastatic breast cancer. The goal of the study is to assess the efficacy and safety of PCS6422 + Cap as a treatment option for patients with advanced or metastatic breast cancer who are not eligible for anthracycline- or taxane-containing therapies, or other available therapies, including PD-1 or PARP inhibitors.
Gender: All
Ages: 18 Years - Any
Updated: 2026-10-06
9 states
NCT04585750
The Evaluation of PC14586 in Patients With Advanced Solid Tumors Harboring a TP53 Y220C Mutation (PYNNACLE)
The Phase 2 monotherapy portion of this study is currently enrolling and will evaluate the efficacy and safety of PC14586 (INN rezatapopt) in participants with locally advanced or metastatic solid tumors harboring a TP53 Y220C mutation. The Phase 1 portion of the study will assess the safety, tolerability and preliminary efficacy of multiple dose levels of rezatapopt as monotherapy and in Phase 1b in combination with pembrolizumab.
Gender: All
Ages: 12 Years - Any
Updated: 2026-10-02
41 states
NCT05868226
PRE-ISPY Phase I/II Oncology Platform Program
PRE-ISPY Phase I/II (I-SPY-P1) is an open-label, multisite platform study with multiple ongoing drug regimen arms added by protocol amendment which is designed to evaluate single agents or combinations in locally advanced, incurable, or metastatic solid tumors and/or oligometastatic malignancy and/or a high risk of recurrence following prior treatment with curative intent. The overall goal is moving promising drug regimens into a larger phase II (or III) trial and in general could feed the neoadjuvant breast I-SPY 2 Trial (NCT01042379) and/or other oncology solid tumor trial in a timely manner.
Gender: All
Ages: 18 Years - Any
Updated: 2026-09-30
7 states
NCT04573231
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 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.
Gender: All
Ages: 18 Years - Any
Updated: 2026-09-28
1 state
NCT04584255
Niraparib + Dostarlimab In BRCA Mutated Breast Cancer
This research study involves pre-operative therapy that is specifically targeted for breast cancer in individuals with BRCA and PALB2 mutations. The names of the study drugs involved in this study are: * Niraparib (Zejula) * Dostarlimab
Gender: All
Ages: 18 Years - Any
Updated: 2026-09-24
6 states
NCT05508906
Phase 1b Study of OP-1250 (Palazestrant) in Combination With Ribociclib, Alpelisib, Everolimus, or Atirmociclib in ER+, HER2- Breast Cancer
This is a Phase 1b open-label, 2-part study in 4 treatment groups. The 4 treatment groups are as follows: Treatment Group 1: Palazestrant (OP-1250) in combination with ribociclib (KISQALI®, Novartis Pharmaceuticals Corporation). Treatment Group 2: Palazestrant (OP-1250) in combination with alpelisib (PIQRAY®, Novartis Pharmaceuticals Corporation). Treatment Group 3: Palazestrant (OP-1250) in combination with everolimus. Treatment Group 4: Palazestrant (OP-1250) in combination with atirmociclib.
Gender: All
Ages: 18 Years - Any
Updated: 2026-09-15
16 states
NCT06756932
BGB-21447 (Bcl-2 Inhibitor) Combinations for Adults With Hormone-Receptor Positive (HR+)/Human Epidermal Growth Factor Receptor 2 Negative (HER2-) Metastatic Breast Cancer
This is a dose escalation and dose expansion study to assess the safety and tolerability of BGB-21447 (a B-cell leukemia/lymphoma 2 inhibitor, Bcl-2i) in combination with fulvestrant, with or without BGB-43395 (cyclin-dependent kinase 4 inhibitor, CDK4i), in adults with HR+/HER2- metastatic breast cancer.
Gender: All
Ages: 18 Years - Any
Updated: 2026-09-14
12 states
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: 2026-09-14
1 state
NCT06649331
Platform Study of ADC Rechallenge in ADC-treated Metastatic Breast Cancer
This is a prospective, open-label, phase 2 platform trial. The purpose of this study is to test the safety and effectiveness of the antibody-conjugated drugs (ADCs) in patients with advanced breast cancer who had previously used antibody-conjugated drugs.
Gender: All
Ages: 18 Years - Any
Updated: 2026-09-03
1 state
NCT06488378
Phase Ib Study of Axatilimab in Combination With Olaparib in BRCA1/2 and PALB2- Associated Metastatic HER2-negative Breast Cancer
This research is being done to evaluate the safety and tolerability of the new drug, axatilimab, in combination with olaparib (a standard of care treatment) in Breast Cancer 1/2 genes (BRCA 1/2) and PALB2 associated HER2-negative metastatic breast cancer. The names of the study drugs involved in this study are: * Axatilimab (a type of antibody) * Olaparib (a type of PARP inhibitor)
Gender: All
Ages: 18 Years - Any
Updated: 2026-09-02
2 states
NCT05150652
Neoadjuvant Endocrine Therapy in ER-positive, HER2-negative Early Stage Breast Cancer
The goal of this study is to access whether treatment of early state estrogen-rich breast cancers with neoadjuvant endocrine therapy will result in higher rates of margin negativity on lumpectomy specimen.
Gender: FEMALE
Ages: 18 Years - 99 Years
Updated: 2026-08-31
1 state
NCT06533826
TReatment of ADC-Refractory Breast CancEr With Dato-DXd or T-DXd: TRADE DXd
The purpose of this study is to test the safety and effectiveness of the sequence of two investigational drugs (trastuzumab deruxtecan followed by datopotamab deruxtecan, or datopotamab deruxtecan followed by trastuzumab deruxtecan) to learn whether the treatment works in treating HER2-negative (HER2-low or HER2-0) metastatic breast cancer. The names of the study drugs involved in this study are: * Datopotamab deruxtecan (a type of antibody drug conjugate) * Trastuzumab deruxtecan (a type of antibody drug conjugate)
Gender: All
Ages: 18 Years - Any
Updated: 2026-08-26
10 states
NCT07227831
A Ph II Study of the TheraBionic P1 Device in Subjects With Hormone Positive Breast Cancer
The goal of this clinical trial is to learn if the TheraBionic P1 device given to patients with advanced or metastatic HR positive, HER2 negative breast cancer who have progressed on standard of care options can affect patients survival. The main questions it aims to answer are: * will the TheraBionic P1 device affect progression free and overall survival in advanced or metastatic HR positive, HER2 negative breast cancer * the long term safety and tolerability of the TheraBionic P1 device * assessment of how the disease responded to the TheraBionic P1 device
Gender: All
Ages: 22 Years - Any
Updated: 2026-08-26
1 state
NCT06382948
Elacestrant + Everolimus in Patients ER+/HER2-, ESR1mut, Advanced Breast Cancer Progressing to ET and CDK4/6i.
This trial will study a type of advanced breast cancer (ABC) defined as endocrine receptor (ER)-positive/human epidermal growth factor receptor 2(HER2)-negative and estrogen receptor 1 (ESR1)-mutated. Patients will be treated with elacestrant, a compound that acts as a selective estrogen receptor degrader, and everolimus (or placebo), a kinase inhibitor indicated for the treatment of postmenopausal women with advanced hormone receptor-positive, HER2-negative breast cancer. The main purpose of the study is to analyze the efficacy (to find out how effective a treatment is) of elacestrant plus everolimus therapy in patients who have ER-positive/HER2-negative, ESR1-mutated, ABC progressing to endocrine therapy and cyclin-dependent kinase 4/6 (CDK4/6) inhibitor. The efficacy of elacestrant plus everolimus combination will be determined by assessing the period from elacestrant plus everolimus (or placebo) treatment initiation until to the first occurrence of disease progression, unacceptable toxicity, death, or discontinuation from the study treatment for any other reason, whichever occurs first, defined as progression free survival. Rigorous eligibility criteria based on specific co-morbidities and clinicopathologic features of their disease have been designed to minimize the risk of patients participating in this study. The anticipated favorable clinical benefits of elacestrant combined with everolimus are projected to outweigh the risks of this treatment. This study will be performed in full compliance with International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) and all applicable local Good Clinical Practice (GCP) and regulations.
Gender: All
Ages: 18 Years - Any
Updated: 2026-08-24
1 state
NCT01791478
BYL719 and Letrozole in Post-Menopausal Patients With Hormone Receptor-Positive Metastatic Breast Cancer
This phase I trial studies the side effects and best dose of the PI3K inhibitor BYL719 when given together with letrozole in treating patients with hormone receptor-positive metastatic breast cancer. The PI3K inhibitor BYL719 may stop the growth of tumor cells by blocking some of the proteins needed for cell growth. Hormone therapy using letrozole may fight breast cancer by blocking the use of estrogen by the tumor cells. Giving the PI3K inhibitor BYL719 together with letrozole may kill more tumor cells
Gender: FEMALE
Ages: 18 Years - Any
Updated: 2026-08-19
2 states
NCT06993506
Real-world Study of SKB264 Monotherapy or Combination Therapy in Recurrent or Metastatic HER2-negative Breast Cancer
This study is a multi-center observational real-world study, with a total of 500 patients planned to be enrolled. This study is divided into two cohorts: the triple-negative breast cancer (TNBC) cohort and the hormone receptor-positive/human epidermal growth factor receptor 2-negative breast cancer (HR+/ HER2-BC) cohort. The aim of this study is to assess the efficacy and safety of Sacituzumab Tirumotecan (SKB264) monotherapy or combination therapy in patients with unresectable locally advanced, recurrent or metastatic HER2-negative breast cancer in the real-world setting.
Gender: All
Ages: 18 Years - Any
Updated: 2026-08-18
13 states
NCT06691035
Immunologic Targeting of ESR1 Receptor for Hormone Receptor Expressing Metastatic Breast Cancer
This is a pilot study to determine feasibility and safety of the combination of Dendritic Cell (DC1) vaccines and elacestrant in patients with hormone positive HER2 negative metastatic breast cancer.
Gender: All
Ages: 18 Years - Any
Updated: 2026-08-18
1 state
NCT07602907
Metronomic Oral Paclitaxel Monotherapy for Advanced HER2-Negative Breast Cancer: A Two-Stage Dose-Finding and Expansion Study
The goal of this clinical trial is to evaluate the safety, tolerability, and preliminary anti-tumor activity of metronomic oral paclitaxel solution in patients with advanced HER2-negative breast cancer who have previously received systemic anti-cancer treatments. The main questions this study aims to answer are: What doses of metronomic oral paclitaxel solution can be safely administered to patients with advanced HER2-negative breast cancer? How well does metronomic oral paclitaxel solution control tumor growth? What side effects and treatment-related medical problems occur during treatment? This study will include two stages. In the first stage, researchers will evaluate different dosing schedules of oral paclitaxel solution to identify a dose(OTD) with an acceptable balance between safety and potential anti-tumor activity. In the second stage, additional participants will receive the selected dose(OTD) to further evaluate its effectiveness and safety. Participants will: Receive metronomic oral paclitaxel solution according to the assigned dose schedule. Visit the study clinic regularly for physical examinations, laboratory tests, tumor imaging assessments, and safety evaluations. Complete assessments of treatment response, side effects, and quality of life during the study. Continue follow-up after treatment to collect information about disease status and survival.
Gender: All
Ages: 18 Years - Any
Updated: 2026-08-11
1 state
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: 2026-08-06
3 states