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ClinicalTrials.gov public records Last synced Oct 2, 2026, 2:32 AM EDT

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Showing 25–48 of 52 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: CDK4/6 + Endocrine therapy Clear all
Recruiting Not applicable Interventional

Signatera-Guided CDK4/6 Inhibitor Therapy in Breast Cancer

NCT07214532
View directory record Official record
Conditions
Breast Neoplasms, Carcinoma, Ductal, Breast, Receptors, Estrogen (for ER-positive Requirement)
Interventions
ctDNA-Guided Treatment Strategy
Device
Lead sponsor
Natera, Inc.
Industry
Eligibility
18 Years and older
Enrollment
725 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2037
U.S. locations
49
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Tucson, Arizona + 44 more
Source: ClinicalTrials.gov public record
Updated Sep 23, 2026 · Synced Oct 2, 2026, 2:32 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 2, 2026, 2:32 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 2, 2026, 2:32 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 2, 2026, 2:32 AM EDT
Recruiting No phase listed Observational

Longitudinal Tumor Burden Quantification Using Circulating Tumor DNA in Metastatic Lobular Breast Cancer

NCT06666439
View directory record Official record
Conditions
Metastatic Invasive Lobular Carcinoma (mILC)
Interventions
circulating tumor DNA (ctDNA)
Diagnostic Test
Lead sponsor
Julia Foldi
Other
Eligibility
18 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 20, 2026 · Synced Oct 2, 2026, 2:32 AM EDT
Recruiting Phase 3 Interventional

A Study to Learn About the Study Medicine Called PF-07248144 in Combination With Fulvestrant in People With HR-positive, HER2-negative Advanced or Metastatic Breast Cancer Who Progressed After a Prior Line of Treatment.

NCT07062965
View directory record Official record
Conditions
Breast Cancer
Interventions
PF-07248144, Fulvestrant, Everolimus, Exemestane
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
102
States / cities
Chandler, Arizona • Gilbert, Arizona • Glendale, Arizona + 85 more
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Oct 2, 2026, 2:32 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 2, 2026, 2:32 AM EDT
Completed Phase 1 Interventional Results available

Fulvestrant, Palbociclib and Erdafitinib in ER+/HER2-/FGFR-amplified Metastatic Breast Cancer

NCT03238196
View directory record Official record
Conditions
Metastatic Breast Cancer
Interventions
Erdafitinib, Palbociclib, Fulvestrant
Drug
Lead sponsor
Vanderbilt-Ingram Cancer Center
Other
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
6
States / cities
Birmingham, Alabama • New York, New York • Pittsburgh, Pennsylvania + 3 more
Source: ClinicalTrials.gov public record
Updated Nov 14, 2024 · Synced Oct 2, 2026, 2:32 AM EDT
Recruiting Phase 2 Interventional

Study of PF-07248144 in Advanced or Metastatic Solid Tumors

NCT04606446
View directory record Official record
Conditions
Locally Advanced or Metastatic ER+ HER2- Breast Cancer, Locally Advanced or Metastatic Castration-resistant Prostate Cancer, Locally Advanced or Metastatic Non-small Cell Lung Cancer
Interventions
PF-07248144, Fulvestrant, Letrozole, Palbociclib, PF-07220060, PF-07850327, ARV-471, vepdegestrant
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
320 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2029
U.S. locations
23
States / cities
Scottsdale, Arizona • Los Angeles, California • San Francisco, California + 11 more
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Oct 2, 2026, 2:32 AM EDT
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 2, 2026, 2:32 AM EDT
Recruiting Phase 1Phase 2 Interventional

ERADICATE: A Phase Ib/II Study of Elacestrant Plus Trastuzumab Deruxtecan in Patients With CDK4/6 Inhibitor and Endocrine-resistant HR+/HER2-low or HER2-ultralow Metastatic Breast Cancer

NCT07198724
View directory record Official record
Conditions
Metastatic Breast Cancer, HER2 Low Breast Carcinoma, HER2-negative Breast Cancer, Breast Cancer, Breast Cancer Female
Interventions
Elacestrant, Trastuzumab Deruxtecan
Drug
Lead sponsor
Kristina A. Fanucci
Other
Eligibility
18 Years and older
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2038
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Oct 2, 2026, 2:32 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 2, 2026, 2:32 AM EDT
Active, not recruiting Phase 1 Interventional

[177Lu]Lu-NeoB in Combination With Ribociclib and Fulvestrant in Participants With ER+, HER2- and GRPR+ Advanced Breast Cancer

NCT05870579
View directory record Official record
Conditions
Breast Cancer
Interventions
[68Ga]Ga-NeoB, [177Lu]Lu-NeoB, Ribociclib, Fulvestrant, Goserelin
Drug · Other
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 100 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2032
U.S. locations
2
States / cities
Los Angeles, California • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 11, 2026 · Synced Oct 2, 2026, 2:32 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 2, 2026, 2:32 AM EDT
Terminated Phase 2 Interventional Results available

Onapristone and Fulvestrant for ER+ HER2- Metastatic Breast Cancer After Endocrine Therapy and CDK4/6 Inhibitors (The SMILE Study)

NCT04738292
View directory record Official record
Conditions
ER-positive Breast Cancer, HER2-negative Breast Cancer, Metastatic Cancer
Interventions
Onapristone, Fulvestrant
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 3, 2024 · Synced Oct 2, 2026, 2:32 AM EDT
Recruiting Phase 2 Interventional

Abemaciclib and Endocrine Therapy in Older Patients With Breast Cancer.

NCT04305834
View directory record Official record
Conditions
Anatomic Stage IV Breast Cancer AJCC v8, Hormone Receptor Positive Breast Carcinoma, Metastatic Breast Carcinoma, Prognostic Stage IV Breast Cancer AJCC v8
Interventions
Abemaciclib, Questionnaire Administration
Drug · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
70 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
6
States / cities
Duarte, California • Irvine, California • Long Beach, California + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 2, 2026, 2:32 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 2, 2026, 2:32 AM EDT
Active, not recruiting Phase 3 Interventional

Phase III Study to Assess AZD9833+ CDK4/6 Inhibitor in HR+/HER2-MBC With Detectable ESR1m Before Progression (SERENA-6)

NCT04964934
View directory record Official record
Conditions
ER-Positive HER2-Negative Breast Cancer
Interventions
AZD9833, AZD9833 Placebo, Anastrozole, Anastrozole placebo, Letrozole, Letrozole placebo, Palbociclib, Abemaciclib, Luteinizing hormone-releasing hormone (LHRH) agonist, Ribociclib
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 130 Years
Enrollment
315 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2028
U.S. locations
64
States / cities
Phoenix, Arizona • Hot Springs, Arkansas • Little Rock, Arkansas + 56 more
Source: ClinicalTrials.gov public record
Updated Sep 23, 2026 · Synced Oct 2, 2026, 2:32 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 2, 2026, 2:32 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional

A Phase I/II, Dose Finding and Optimization Study of [177Lu]Lu-NeoB in Combination With Capecitabine in Patients With GRPR+, ER+, HER2- Metastatic Breast Cancer After Progression on Previous Endocrine Therapy in Combination With a CDK4/6 Inhibitor.

NCT06247995
View directory record Official record
Conditions
Breast Cancer
Interventions
[68Ga]Ga-NeoB, [177Lu]Lu-NeoB, Capecitabine
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 100 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
5
States / cities
Los Angeles, California • Newport Beach, California • Rochester, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2026 · Synced Oct 2, 2026, 2:32 AM EDT
Recruiting No phase listed Observational

DiviTum®TKa: A Biomarker Assay for Efficacy in HR+ Breast Cancer Patients

NCT06388122
View directory record Official record
Conditions
HER2-negative Breast Cancer, Hormone-receptor-positive Breast Cancer, Metastatic Breast Cancer, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IV Breast Cancer AJCC v8, HER2 Negative Breast Carcinoma, Hormone Receptor Positive Breast Carcinoma, Metastatic Breast Carcinoma
Interventions
Biospecimen Collection
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2031
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Oct 2, 2026, 2:32 AM EDT
Recruiting Not applicable Interventional

BettER: Biomarker Driven Early Therapeutic Selection in Patients With HR+ HER2- Metastatic or Unresectable Breast Cancer

NCT05977036
View directory record Official record
Conditions
Metastatic Breast Cancer, Unresectable Breast Cancer
Interventions
DiviTum® TKa assay, CDK4/6 + Endocrine therapy
Device · Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2034
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Oct 2, 2026, 2:32 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

A Study of PF-06873600 in People With Cancer

NCT03519178
View directory record Official record
Conditions
HR+ HER2- Metastatic Breast Cancer, Ovarian Cancer, Fallopian Tube Cancer, Primary Peritoneal Cancer, Triple Negative Breast Cancer, Male Breast Cancer
Interventions
PF-06873600, Endocrine Therapy 1, Endocrine Therapy 2
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
155 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
39
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Fayetteville, Arkansas + 22 more
Source: ClinicalTrials.gov public record
Updated Nov 14, 2025 · Synced Oct 2, 2026, 2:32 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 2, 2026, 2:32 AM EDT