Treatment for advanced HR+/HER2- breast cancer and other solid tumors
Official title: An Open-label, Multi-center, Phase I/II Study of ECI830 as a Single Agent and in Combination With Ribociclib and Endocrine Therapy in Patients With Advanced Hormone Receptor Positive, HER2-negative Breast Cancer and Advanced Solid Tumors
Run by Novartis · NCT06726148 · Data updated 2026-11-12
This study is testing a new treatment called ECI830, alone and with other medications, to see if it helps people with advanced hormone receptor-positive breast cancer and certain other solid tumors.
Quick facts
| Phase | Phase1; Phase2 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 100 Years |
| Sex | All |
| Enrollment | 280 (estimated) |
| Sponsor | Novartis Industry-sponsored |
| Locations | 33 sites (Los Angeles, California and 32 other locations) |
| Status | Recruiting |
| Started | April 3, 2025 |
| Main results expected | September 25, 2028 |
| Study ends | September 25, 2028 |
| Registry record updated | August 27, 2026 |
| Trial ID | NCT06726148 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates include adults aged 18 and older with advanced HR+/HER2- breast cancer or solid tumors with CCNE1 amplification who have experienced disease progression after prior therapies.
✕Probably not a fit
Patients who have not progressed on prior hormone-based therapies or those with other types of breast cancer not meeting the eligibility criteria may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This clinical trial evaluates the safety and effectiveness of ECI830, both as a standalone treatment and in combination with ribociclib and fulvestrant, for patients with advanced hormone receptor-positive and HER2-negative breast cancer, as well as other solid tumors with CCNE1 amplification. The study is divided into two phases: the first phase focuses on determining the optimal dosage and safety profile of ECI830, while the second phase assesses its anti-tumor activity in combination with other therapies. The trial is open-label and multi-center, allowing for a diverse patient population.
Why it matters
Potential benefit: If successful, this treatment could provide a new therapeutic option for patients with advanced breast cancer and other solid tumors, potentially improving outcomes.
How similar studies have gone: Other studies have shown promise with similar combination therapies in advanced breast cancer, suggesting potential for success in this approach.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: Age ≥ 18 years old. Patients with one of the following indications: Phase I: HR+/HER2- aBC with disease progression on or following at least one line of hormone-based therapy in combination with a CDK4/6i and at least one additional line of systemic therapy for metastatic disease. Histologically and/or cytologically confirmed diagnosis of locally advanced or metastatic cancer with a CCNE1 amplification. For dose expansion only: no more than 3 prior lines of therapy for advanced or metastatic disease. Patients with ES-SCLC and disease progression on or after standard of care (SoC). For dose expansion only: no more than 2 prior lines of therapy for advanced or metastatic disease are allowed. Phase II: HR+/HER2- aBC with disease progression on an aromatase inhibitor or tamoxifen in combination with a CDK4/6 inhibitor for unresectable/metastatic disease with no more than 2 lines of endocrine therapy. Measurable disease as determined by RECIST v1.1. BC only: If no measurable disease is present, then at least one predominantly lytic bone lesion must be present that can be accurately assessed at baseline and is suitable for repeated assessment. Exclusion Criteria: Previous treatment with a CDK2 inhibitor at any time. Patients with inadequate bone marrow and/or organ functions with out-of-range laboratory values. Clinically significant, uncontrolled heart disease and/or cardiac repolarization abnormality including MI, CABG, long QT syndrome, or risk factors for TdP. Presence of symptomatic CNS metastases or CNS metastases that require local therapy or increasing doses of corticosteroids within 2 weeks prior to study entry. For the combination treatment: Patients with symptomatic visceral disease or any disease burden that makes the patient ineligible for endocrine-based therapy. Patients who could not tolerate the prescribed dose of ribociclib during a previous course of treatment, requiring dose reduction or permanent discontinuation due to adverse events. For patients with BC: Patient is concurrently using hormone replacement therapy. WOCBP who are unwilling to use highly effective contraception methods, pregnant or nursing women. Other protocol-defined inclusion/exclusion criteria may apply.
Where it's running
-
University of California LA
Los Angeles, California, United States Recruiting -
Florida Cancer Specialists
Fort Myers, Florida, United States Recruiting -
Dana Farber Cancer Institute
Boston, Massachusetts, United States Recruiting -
WA Uni School Of Med
St Louis, Missouri, United States Recruiting -
Memorial Sloan Kettering
New York, New York, United States Recruiting -
SCRI Oncology Partners
Nashville, Tennessee, United States Recruiting
Show 27 more locations
-
MD Anderson Cancer Center Uni of Te
Houston, Texas, United States Recruiting -
Fred Hutch Cancer Research
Seattle, Washington, United States Recruiting -
Novartis Investigative Site
Clayton, Victoria, Australia Recruiting -
Novartis Investigative Site
Melbourne, Victoria, Australia Recruiting -
Novartis Investigative Site
Toronto, Ontario, Canada Recruiting -
Novartis Investigative Site
Montreal, Quebec, Canada Recruiting -
Novartis Investigative Site
Nanjing, Jiangsu, China Recruiting -
Novartis Investigative Site
Xian, Shanxi, China Recruiting -
Novartis Investigative Site
Brno, Czechia Recruiting -
Novartis Investigative Site
Copenhagen, Denmark Recruiting -
Novartis Investigative Site
Odense C, Denmark Recruiting -
Novartis Investigative Site
Bordeaux, France Recruiting -
Novartis Investigative Site
Saint-Herblain, France Recruiting -
Novartis Investigative Site
Freiburg im Breisgau, Baden-Wurttemberg, Germany Recruiting -
Novartis Investigative Site
Heidelberg, Germany Recruiting -
Novartis Investigative Site
Ulm, Germany Recruiting -
Novartis Investigative Site
Haifa, Israel Recruiting -
Novartis Investigative Site
Tel Aviv, Israel Recruiting -
Novartis Investigative Site
Milan, Mi, Italy Recruiting -
Novartis Investigative Site
Modena, Mo, Italy Recruiting -
Novartis Investigative Site
Chuo Ku, Tokyo, Japan Recruiting -
Novartis Investigative Site
Singapore, Singapore Recruiting -
Novartis Investigative Site
Seoul, Seoul, South Korea Recruiting -
Novartis Investigative Site
Barcelona, Spain Recruiting -
Novartis Investigative Site
Barcelona, Spain Recruiting -
Novartis Investigative Site
Tainan, Taiwan Recruiting -
Novartis Investigative Site
London, Oxford, United Kingdom Recruiting
Study contacts
- Study coordinator: Novartis Pharmaceuticals
- Email: novartis.email@novartis.com
- Phone: 1-888-669-6682
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
-
GVV858 alone or with fulvestrant or letrozole for HR+/HER2- breast cancer and other advanced tumors
This trial tests whether GVV858 alone or with fulvestrant or letrozole can help adults with HR+/HER2- advanced breast cancer, CCNE1‑amplified solid tumors, or metastatic castration‑resistant prostate cancer.
-
QLC5508 plus QL2107 vs tislelizumab plus platinum chemotherapy as first treatment for extensive-stage small cell lung cancer
This phase 3 trial tests whether QLC5508 with QL2107 works better than tislelizumab with platinum chemotherapy for adults with untreated extensive-stage small cell lung cancer.
-
BL-M14D1 with Atezolizumab for extensive-stage small cell lung cancer
This phase 2 trial tests whether adding BL-M14D1 to atezolizumab helps people with extensive-stage small cell lung cancer live longer or well enough to continue treatment.
-
Tislelizumab use in European patients with NSCLC or ES-SCLC in routine care
This study looks at how tislelizumab is used in real-world European patients with advanced NSCLC or extensive-stage SCLC and what outcomes are seen in everyday clinical practice.
-
IEV407 as a single agent or with endocrine therapy for advanced HR+/HER2- breast cancer
This study tests IEV407 by itself and with fulvestrant or letrozole to see if it is safe and shows signs of activity in adults with advanced HR+/HER2- breast cancer.
-
Autologous B7-H3 CAR T Cells in Advanced Small Cell Lung Cancer and Extrapulmonary Neuroendocrine Cancer
This study tests a patient’s own B7-H3 CAR T cells to see if they can help people 18 and older whose small cell lung cancer or EPNEC has come back or hasn’t responded to prior treatment.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.