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Recruiting Phase 1, Phase 2 NCT06726148

NCT06726148 Study of ECI830 Single Agent or in Combination in Patients With Advanced HR+/HER2- Breast Cancer and in Patients With Other Advanced Solid Tumors

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Clinical Trial Summary
NCT ID NCT06726148
Status Recruiting
Phase Phase 1, Phase 2
Sponsor Novartis Pharmaceuticals
Condition Advanced HR+/HER2- Breast Cancer
Study Type INTERVENTIONAL
Enrollment 280 participants
Start Date 2025-04-03
Primary Completion 2028-09-25

Eligibility & Interventions

Sex All sexes
Min Age 18 Years
Max Age 100 Years
Study Type INTERVENTIONAL
Interventions
ECI830ribociclibfulvestrant

Eligibility Fast-Check

Enter your details for a quick preliminary check. This does not replace medical advice.

What to Expect as a Participant

You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.

Phase 1 is the earliest stage of human testing — safety and dosage are the primary focus. Visits are frequent and medical supervision is intensive. You will be among the first people to receive this treatment.

This trial targets 280 participants in total. It began in 2025-04-03 with a primary completion date of 2028-09-25.

⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.

Brief Summary

Phase I: Characterize safety and tolerability of ECI830 as a single agent and in combination with ribociclib and fulvestrant. Identify dose range for optimization/recommended dose for future studies. Phase II: Assess the anti-tumor activity of ECI830 in combination with ribociclib and fulvestrant in patients with hormone receptor-positive/human epidermal growth factor receptor 2-negative (HR+/HER2-) advanced breast cancer.

Eligibility 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.

Contact & Investigator

Central Contact

Novartis Pharmaceuticals

✉ novartis.email@novartis.com

📞 1-888-669-6682

Frequently Asked Questions

Who can join the NCT06726148 clinical trial?

This trial is open to participants of all sexes, aged 18 Years or older, up to 100 Years, studying Advanced HR+/HER2- Breast Cancer. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.

What phase is the NCT06726148 trial and what does that mean for participants?

Phase 1 trials are the first stage of human testing. The primary goal is to assess safety and determine appropriate dosage levels. Participants are closely monitored. These trials typically involve a small number of volunteers.

Is NCT06726148 currently recruiting?

Yes, NCT06726148 is actively recruiting participants. Contact the research team at novartis.email@novartis.com for enrollment information.

Where is the NCT06726148 trial being conducted?

This trial is being conducted at Los Angeles, United States, Fort Myers, United States, Boston, United States, St Louis, United States and 11 additional locations.

Who is sponsoring the NCT06726148 clinical trial?

NCT06726148 is sponsored by Novartis Pharmaceuticals. The trial plans to enroll 280 participants.

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ClinicalMetric — Independent clinical trial intelligence platform. Not affiliated with NIH, ClinicalTrials.gov, the U.S. FDA, or any pharmaceutical company, hospital, or clinical research organization. Trial data is sourced from ClinicalTrials.gov for informational purposes only and does not constitute medical advice. Do not make any treatment, enrollment, or health decisions based solely on information found here — always consult a qualified healthcare professional. Full Disclaimer  ·  Last Reviewed: November 2026  ·  Data Methodology