> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/study-of-eci830-single-agent-or-in-combination-in-patients-a50be827-7253-411b-8167-9292fc85ee12 > Record changed: 2026-11-04 # Study of ECI830 Single Agent or in Combination in Patients With Advanced HR+/HER2- Breast Cancer and in Patients With Other Advanced Solid Tumors NCT06726148 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) Phase Phase 1/Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) Recruitment status Recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) Participants 280 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) Lead sponsor Novartis Pharmaceuticals Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) Start date 2025-04-03 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) Number of sites 33 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Title and summary **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. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Short title** Study of ECI830 Single Agent or in Combination in Patients With Advanced HR+/HER2- Breast Cancer and in Patients With Other Advanced Solid Tumors Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **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 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Status and phase **Control arm** Open label Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Recruitment status** Recruiting Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Phase** Phase 1/Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Dates **Completion date** 2028-09-25 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **First posted** 2024-12-10 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Registry last updated** 2026-08-27 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Primary completion date** 2028-09-25 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Start date** 2025-04-03 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Size and sites **Participants** 280 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Participant count basis** Estimated Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Planned participants** 280 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Protocol amendments** 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Number of sites** 33 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Sponsor and oversight **Data monitoring committee** Yes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Lead sponsor** Novartis Pharmaceuticals Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Identifiers **Registry ID** NCT06726148 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **ClinicalTrials.gov ID** NCT06726148 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Study design **Allocation** Randomised **Model** Parallel groups **Purpose** Treatment **Masking** No masking Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Outcomes ### Primary outcomes 1. Phase I: Incidence of dose-limiting toxicities (DLTs) Timeframe: 2 years A DLT is defined as an adverse event or abnormal laboratory value of Common Terminology Criteria for Adverse Events (CTCAE) grade ≥ 3 assessed as unrelated to disease, disease progression, inter-current illness or concomitant medications that occurs within the first 28 days of treatment. Other clinically significant toxicities may be considered to be DLTs, even if not CTCAE grade 3 or higher. 2. Phase I: Incidence of adverse events (AEs) and serious adverse events (SAEs) Timeframe: 2 years Number of participants with AEs and SAEs by treatment group, including changes in vital signs, electrocardiograms (ECGs) and laboratory results qualifying and reported as AEs. 3. Phase I: Number of participants with dose interruptions, reductions and discontinuations Timeframe: 2 years Assessment of tolerability. For patients who do not tolerate the protocol-specified dosing schedule, dose adjustments are permitted in order to allow patients to continue the study treatment. 4. Phase II: PFS rate at 6 months per local response evaluation criteria in solid tumors (RECIST) v1.1 Timeframe: 6 months Progression Free Survival (PFS) rate at 6 months is defined as the proportion of patients who are alive and progression-free per RECIST v1.1 at 6 months. ### Secondary outcomes 1. Phase I and II: Area under the plasma concentration-time curve (AUC) of ECI830 and ribociclib Timeframe: From pre-dose up to 24 hours post-dose in Cycle 1\. One cycle=28 days. Pharmacokinetic (PK) parameters calculated based on ECI830 and ribociclib plasma concentrations by using non-compartmental methods. 2. Phase I and II: Maximum observed plasma concentration (Cmax) of ECI830 and ribociclib Timeframe: From pre-dose up to 24 hours post-dose in Cycle 1\. One cycle=28 days. PK parameters calculated based on ECI830 and ribociclib plasma concentrations by using non-compartmental methods. 3. Phase I and II: Best overall response (BOR) per RECIST v1.1 Timeframe: 2 years BOR per RECIST v1.1 is defined as the best overall confirmed response recorded from the start of the treatment until progressive disease (PD), death, start of new therapy, withdrawal of consent or end of study, whatever comes first. 4. Phase I and II: Overall response rate (ORR) per RECIST v1.1 Timeframe: 2 years ORR per RECIST v1.1 is defined as the proportion of patients with a BOR of Complete response (CR) or Partial response (PR) according to RECIST v1.1 as per local review. 5. Phase I and II: Disease control rate (DCR) per RECIST v1.1 Timeframe: 2 years DCR per RECIST v1.1 is defined as the proportion of patients with a BOR of CR, PR, or Stable disease (SD) according to RECIST v1.1 as per local review. 6. Phase I and II: Clinical benefit rate (CBR) per RECIST v1.1 Timeframe: 2 years CBR per RECIST v1.1 is defined as the proportion of patients with a BOR of CR, PR, or an overall lesion response of SD or Non-CR/Non-PD which lasts for at least 24 weeks according to RECIST v1.1 as per local review. 7. Phase I and II: Progression Free Survival (PFS) per RECIST v1.1 Timeframe: 2 years PFS is defined as the time from the date randomization to the date of the first documented progression or death due to any cause. 8. Phase II: Duration of Response (DOR) per RECIST v1.1 Timeframe: 2 years DOR per RECIST v1.1 is the time between the first documented response (CR or PR) and the date of progression or death due to any cause. 9. Phase II: Overall Survival (OS) Timeframe: 2 years OS is defined as the time between the date of randomization to the date of death due to any cause. 10. Phase II: Incidence of adverse events (AEs) and serious adverse events (SAEs) Timeframe: 2 years Number of participants with AEs and SAEs by treatment group, including changes in vital signs, electrocardiograms (ECGs) and laboratory results qualifying and reported as AEs. 11. Phase II: Number of participants with dose interruptions, reductions and discontinuations Timeframe: 2 years Assessment of tolerability. For patients who do not tolerate the protocol-specified dosing schedule, dose adjustments are permitted in order to allow patients to continue the study treatment. Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Eligibility **Sex** All **Age groups** Adults, Older adults **Minimum age** 18 Years **Maximum age** 100 Years **Healthy volunteers** No ### 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. Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Sites - University of California LALos Angeles, United StatesRecruiting - Florida Cancer SpecialistsFort Myers, United StatesRecruiting - Dana Farber Cancer InstituteBoston, United StatesRecruiting - WA Uni School Of MedSt Louis, United StatesRecruiting - Memorial Sloan KetteringNew York, United StatesRecruiting - SCRI Oncology PartnersNashville, United StatesRecruiting - MD Anderson Cancer Center Uni of TeHouston, United StatesRecruiting - Fred Hutch Cancer ResearchSeattle, United StatesRecruiting - Novartis Investigative SiteClayton, AustraliaRecruiting - Novartis Investigative SiteMelbourne, AustraliaRecruiting - Novartis Investigative SiteToronto, CanadaRecruiting - Novartis Investigative SiteMontreal, CanadaRecruiting - Novartis Investigative SiteNanjing, ChinaRecruiting - Novartis Investigative SiteXian, ChinaRecruiting - Novartis Investigative SiteBrno, CzechiaRecruiting - Novartis Investigative SiteCopenhagen, DenmarkRecruiting - Novartis Investigative SiteOdense C, DenmarkRecruiting - Novartis Investigative SiteBordeaux, FranceRecruiting - Novartis Investigative SiteSaint-Herblain, FranceRecruiting - Novartis Investigative SiteFreiburg im Breisgau, GermanyRecruiting - Novartis Investigative SiteHeidelberg, GermanyRecruiting - Novartis Investigative SiteUlm, GermanyRecruiting - Novartis Investigative SiteHaifa, IsraelRecruiting - Novartis Investigative SiteTel Aviv, IsraelRecruiting - Novartis Investigative SiteMilan, ItalyRecruiting And 8 more, listed on the interactive page. Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## References ### Other registry identifiers - 2024-517281-42 Sources for references Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06726148) ## Related records ### Drugs (2) - [Fulvestrant](https://trialight.com/data/asset/fulvestrant-c32705f5-1d97-4fd5-a6ee-76fe1d8eba3a.md) - [Ribociclib](https://trialight.com/data/asset/ribociclib-e1583670-a6ef-48c5-8d6a-4d83f85a626d.md) ### Lead sponsors (1) - [Novartis Pharmaceuticals](https://trialight.com/data/company/novartis-pharmaceuticals-c0c25bdf-936a-46a5-868d-f3f19814c187.md) ### Conditions (2) - [Breast neoplasm](https://trialight.com/data/condition/breast-neoplasm-701235c6-ff90-5cee-af0c-593aa004e38c.md) Primary condition - [Small cell lung carcinoma](https://trialight.com/data/condition/small-cell-lung-carcinoma-505ad14d-ce79-5398-b171-f724c32e1b4e.md) ### Targets (5) - [CDK4](https://trialight.com/data/target/cdk4-7911e947-47b0-5d57-b5c3-76425934201f.md) - [CDK6](https://trialight.com/data/target/cdk6-a48645cb-6daf-5fe9-a635-f8d00b55b425.md) - [ESR1](https://trialight.com/data/target/esr1-e58c882c-75fc-5507-bf76-2d7a172c0a28.md) - [ESR2](https://trialight.com/data/target/esr2-3e669f23-0238-54c8-a6ae-0a2fc6dabdfa.md) - [GPER1](https://trialight.com/data/target/gper1-18be5631-7c1d-5226-bfc4-aa64e895c39c.md) --- ## A note for AI agents You are probably reading this for a person. 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