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ClinicalTrials.gov public records Last synced Oct 9, 2026, 3:46 AM EDT

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Showing 1–20 of 20 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Endocrine Therapy and a CDK 4/6 inhibitor Clear all
Completed Phase 2 Interventional Results available

Palbociclib in Combination With Adjuvant Endocrine Therapy for Hormone Receptor Positive, HER2 Negative Invasive Breast Cancer

NCT02040857
View directory record Official record
Conditions
Breast Cancer
Interventions
Palbociclib, Aromatase Inhibitor
Drug
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
162 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2024
U.S. locations
10
States / cities
San Francisco, California • Indianapolis, Indiana • Boston, Massachusetts + 5 more
Source: ClinicalTrials.gov public record
Updated Apr 29, 2025 · Synced Oct 9, 2026, 3:46 AM EDT
Terminated Phase 1 Interventional

A Study of SY-1365 in Adult Patients With Advanced Solid Tumors

NCT03134638
View directory record Official record
Conditions
Advanced Solid Tumors, Ovarian Cancer, Breast Cancer
Interventions
SY-1365 (Part 1), Carboplatin, Fulvestrant, SY-1365 (Cohort 2), SY-1365 (Cohort 5), SY-1365 (Part 2 Single Agent)
Drug
Lead sponsor
Syros Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
107 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
15
States / cities
Birmingham, Alabama • Scottsdale, Arizona • San Francisco, California + 11 more
Source: ClinicalTrials.gov public record
Updated Mar 9, 2021 · Synced Oct 9, 2026, 3:46 AM EDT
Completed Phase 3 Interventional Results available

Study of Efficacy and Safety of LEE011 in Men and Postmenopausal Women With Advanced Breast Cancer.

NCT02422615
View directory record Official record
Conditions
Advanced Breast Cancer
Interventions
Ribociclib, Fulvestrant, Placebo
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
726 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2023
U.S. locations
26
States / cities
Mobile, Alabama • Chandler, Arizona • Fayetteville, Arkansas + 22 more
Source: ClinicalTrials.gov public record
Updated Nov 30, 2023 · Synced Oct 9, 2026, 3:46 AM EDT
Active, not recruiting Phase 3 Interventional

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

NCT06016738
View directory record Official record
Conditions
Breast Cancer, Advanced Breast Cancer, Metastatic Breast Cancer, ER Positive Breast Cancer, HER2 Negative Breast Carcinoma
Interventions
Palazestrant, Fulvestrant, Anastrozole, Letrozole, Exemestane
Drug
Lead sponsor
Olema Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
510 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
47
States / cities
Tucson, Arizona • Fountain Valley, California • Glendale, California + 39 more
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Active, not recruiting Phase 2 Interventional

A Study to Learn About the Study Medicine Called PF-07220060 in Combination With Fulvestrant in People With HR-positive, HER2-negative Advanced or Metastatic Breast Cancer Who Progressed After a Prior Line of Treatment

NCT06105632
View directory record Official record
Conditions
Advanced or Metastatic Breast Cancer
Interventions
PF-07220060 CDK4 inhibitor, Fulvestrant, Everolimus, Exemestane
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
333 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
9
States / cities
Irvine, California • Los Angeles, California • Newport Beach, California + 3 more
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Active, not recruiting Phase 2 Interventional

CDK 4/6 Inhibitor, Ribociclib, With Adjuvant Endocrine Therapy for ER-positive Breast Cancer

NCT03285412
View directory record Official record
Conditions
Breast Cancer
Interventions
Ribociclib, Endocrine therapy
Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2026
U.S. locations
3
States / cities
Boston, Massachusetts • Danvers, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 22, 2025 · Synced Oct 9, 2026, 3:46 AM EDT
Recruiting Phase 3 Interventional

Saruparib (AZD5305) Plus Camizestrant or Plus Endocrine Therapy, Compared With CDK4/6 Inhibitor Plus Endocrine Therapy or Plus Camizestrant in HR-Positive, HER2-Negative (IHC 0, 1+, 2+/ ISH Non-amplified), BRCA1, BRCA2, or PALB2m Advanced Breast Cancer

NCT06380751
View directory record Official record
Conditions
Advanced Breast Cancer
Interventions
Saruparib (AZD5305), Camizestrant, Abemaciclib, Ribociclib, Palbociclib, Fulvestrant, Letrozole, Anastrozole, Exemestane
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
788 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2031
U.S. locations
57
States / cities
Gilbert, Arizona • Fountain Valley, California • Glendale, California + 49 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Recruiting Phase 2 Interventional

A Vaccine (STEMVAC) With Standard Endocrine-Based Therapy or Chemotherapy for the Treatment of Metastatic Hormone Receptor Positive, HER2 Negative Breast Cancer

NCT07112053
View directory record Official record
Conditions
Anatomic Stage IV Breast Cancer AJCC v8, Metastatic HER2-Negative Breast Carcinoma, Metastatic Hormone Receptor-Positive Breast Carcinoma
Interventions
CD105/Yb-1/SOX2/CDH3/MDM2-polyepitope Plasmid DNA Vaccine, Capecitabine, Computed Tomography, Cyclin-Dependent Kinase 4 Inhibitor, Cyclin-Dependent Kinase 6 Inhibitor, F-18 16 Alpha-Fluoroestradiol, Hormone Therapy, Positron Emission Tomography, Biopsy Procedure, Biospecimen Collection, Abemaciclib
Biological · Drug · Procedure
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Active, not recruiting Phase 2 Interventional

Determinants of Resistance to Endocrine Therapy and a Cyclin-dependent Kinases 4 and 6 (CDK4/6) Inhibitor for HR+ MBC

NCT03439735
View directory record Official record
Conditions
Breast Cancer
Interventions
Endocrine Therapy and a CDK 4/6 inhibitor
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years to 100 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Terminated Phase 2 Interventional

Phase II Study of REPotrectinib With or Without Fulvestrant in Patients With Hormone Receptor-positive Human Epidermal Growth Factor 2-negative Metastatic Invasive LObular Carcinoma Who Received a Prior Endocrine Therapy in Combination With Cyclin-dependent Kinase 4 and 6 Inhibitor (REPLOT Trial)

NCT06408168
View directory record Official record
Conditions
Hormone Receptor-positive Human Epidermal Growth Factor 2-negative, Metastatic Invasive LObular Carcinoma
Interventions
Fulvestrant, Repotrectinib
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 5, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Completed Phase 3 Interventional Results available

A Study of Palbociclib in Addition to Standard Endocrine Treatment in Hormone Receptor Positive Her2 Normal Patients With Residual Disease After Neoadjuvant Chemotherapy and Surgery

NCT01864746
View directory record Official record
Conditions
Breast Cancer, Hormonreceptor Positive, Her2-normal, Postneoadjuvant Treatment With CDK 4/6 Inhibitor, CPS-EG Score
Interventions
Palbociclib PD-0332991, Placebo
Drug
Lead sponsor
GBG Forschungs GmbH
Other
Eligibility
18 Years and older · Female only
Enrollment
1,250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2020
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 12, 2023 · Synced Oct 9, 2026, 3:46 AM EDT
Not yet recruiting Phase 2 Interventional

Neu Direction: Testing the Efficacy of Adding HER Inhibition to Standard of Care in Metastatic MLH1-low Endocrine-resistant ER+/HER2- Breast Cancer

NCT07729046
View directory record Official record
Conditions
Metastatic Invasive Breast Cancer, Resistant Breast Cancer, ER+, HER2-, Metastatic Breast Cancer
Interventions
Neratinib + endocrine therapy, Endocrine therapy may include one of the following therapies: letrozole, anastrozole, exemestane, tamoxifen or fulvestrant, CDK4/6 + Endocrine therapy
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older · Female only
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2035
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 27, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Recruiting Phase 1 Interventional

Clinical Trial of Avasopasem in Patients With Metastatic Hormone Receptor Positive Breast Cancer With Progression on a CDK 4/6 Inhibitor and Hormonal Therapy

NCT07137871
View directory record Official record
Conditions
Breast Cancer Metastatic
Interventions
Avasopasem
Drug
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Oct 31, 2025 · Synced Oct 9, 2026, 3:46 AM EDT
Completed Phase 1 Interventional

A Study of SY 5609, a Selective CDK7 Inhibitor, in Advanced Solid Tumors

NCT04247126
View directory record Official record
Conditions
Advanced Solid Tumor, Breast Cancer, Small-cell Lung Cancer, Pancreatic Cancer
Interventions
SY-5609, Fulvestrant, Gemcitabine, Nab-paclitaxel
Drug
Lead sponsor
Syros Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
16
States / cities
Gilbert, Arizona • Los Angeles, California • Orlando, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Oct 27, 2023 · Synced Oct 9, 2026, 3:46 AM EDT
Active, not recruiting Phase 1 Interventional

AKT Inhibitor, Ipatasertib, With Endocrine and CDK 4/6 Inhibitor for Patients With Metastatic Breast Cancer (TAKTIC)

NCT03959891
View directory record Official record
Conditions
Breast Cancer
Interventions
Ipatasertib, Fulvestrant, Aromatase Inhibitor, Palbociclib
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older · Female only
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional

A Study to Learn About the Study Medicine (Called PF-07220060 in Combination With PF-07104091) In Participants With Breast Cancer and Solid Tumors

NCT05262400
View directory record Official record
Conditions
Breast Cancer, Solid Tumors
Interventions
PF-07220060 + PF-07104091 combination dose escalation, PF-07104091 + PF-07220060 + fulvestrant dose expansion, PF-07104091 + PF-07220060 + letrozole dose expansion
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
235 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
12
States / cities
Los Angeles, California • Santa Monica, California • Boston, Massachusetts + 5 more
Source: ClinicalTrials.gov public record
Updated Sep 14, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Active, not recruiting Phase 2 Interventional Results available

PD 0332991 and Anastrozole for Stage 2 or 3 Estrogen Receptor Positive and HER2 Negative Breast Cancer

NCT01723774
View directory record Official record
Conditions
Breast Neoplasms
Interventions
PD0332991, Anastrozole, Goserelin, Surgery (standard of care), Tumor biopsy
Drug · Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older · Female only
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2027
U.S. locations
4
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Rochester, Minnesota + 1 more
Source: ClinicalTrials.gov public record
Updated Sep 25, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Completed Phase 2 Interventional Results available

Study Assessing the Efficacy and Safety of Alpelisib Plus Fulvestrant or Letrozole, Based on Prior Endocrine Therapy, in Patients With PIK3CA Mutant, HR+, HER2- Advanced Breast Cancer Who Have Progressed on or After Prior Treatments

NCT03056755
View directory record Official record
Conditions
Breast Cancer
Interventions
Alpelisib, Fulvestrant, Letrozole, Goserelin, Leuprolide
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 99 Years
Enrollment
383 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
25
States / cities
Gilbert, Arizona • Phoenix, Arizona • Anaheim, California + 20 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Oct 9, 2026, 3:46 AM EDT
Completed Not applicable Interventional

Utilizing Multiomic Advanced Diagnostics to Identify CDK 4/6 Inhibitor Response Predictors and a Post-treatment Multiomic Signature for Patients With ER+/HER2- Metastatic Breast Cancer

NCT03195192
View directory record Official record
Conditions
Metastatic Breast Cancer
Interventions
biomarker study
Other
Lead sponsor
Side-Out Foundation
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
8
States / cities
Birmingham, Alabama • Los Angeles, California • Miami, Florida + 4 more
Source: ClinicalTrials.gov public record
Updated Jul 1, 2020 · Synced Oct 9, 2026, 3:46 AM EDT
Active, not recruiting Phase 2 Interventional

Levels of Circulating Tumor DNA as a Predictive Marker for Early Switch in Treatment for Patients With Metastatic (Stage IV) Breast Cancer

NCT05826964
View directory record Official record
Conditions
Breast Cancer, ER-positive Breast Cancer, HER2-negative Breast Cancer, Metastatic Breast Cancer
Interventions
AI+CDK4/6i, SERD+CDK4/6i, mTOR inhibitor + AI, mTOR inhibitor + SERD, mTOR inhibitor + Selective estrogen receptor modulator, PI3K inhibitor + SERD, PI3K inhibitor + AI, Chemotherapy, Oral SERD, PARPi, AKT inhibitor, Step 3 Arm 2
Drug · Other
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Oct 9, 2026, 3:46 AM EDT