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ECI830

Phase 1

Advanced HR+/HER2- Breast Cancer | Small molecule | Oncology |Novartis AG|Trials Updated: Aug 27, 2026

ECI830 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Dec 2024

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment280

FDA Designations

No designations recorded

ECI830 clinical trials

ECI830 · 1 trial · 3 indications

Phase 1 1
NCT06726148Study of ECI830 Single Agent or in Combination in Patients With Advanced HR+/HER2- Breast Cancer and in Patients With Other Advanced Solid TumorsAdvanced HR+/HER2- Breast Cancer
RECRUITING280 Analytics
PHASE1RECRUITING
Study of ECI830 Single Agent or in Combination in Patients With Advanced HR+/HER2- Breast Cancer and in Patients With Other Advanced Solid Tumors
Advanced HR+/HER2- Breast CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Phase I: Incidence of dose-limiting toxicities (DLTs)
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.

Phase I: Incidence of adverse events (AEs) and serious adverse events (SAEs)
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.

Phase I: Number of participants with dose interruptions, reductions and discontinuations
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.

Phase II: PFS rate at 6 months per local response evaluation criteria in solid tumors (RECIST) v1.1
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 Endpoints

Phase I and II: Area under the plasma concentration-time curve (AUC) of ECI830 and ribociclib
From pre-dose up to 24 hours post-dose in Cycle 1. One cycle=28 days.
Phase I and II: Maximum observed plasma concentration (Cmax) of ECI830 and ribociclib
From pre-dose up to 24 hours post-dose in Cycle 1. One cycle=28 days.
Phase I and II: Best overall response (BOR) per RECIST v1.1
2 years
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ECI830 Single Agent (Arm A)EXPERIMENTALPhase I
Dose Escalation Combination ECI830 + ribociclib + fulvestrant (Arm B)EXPERIMENTALPhase I
Ribociclib in combination with fulvestrant (Arm C)EXPERIMENTALPhase II
ECI830 in combination with fulvestrant (Arm D)EXPERIMENTALPhase II
ECI830 in combination with ribociclib and fulvestrant (Arm E)EXPERIMENTALPhase II
ECI830 in combination with ribociclib and fulvestrant (Arm F)EXPERIMENTALPhase II

Interventions

NameTypeDescription
ECI830DRUGExperimental
ribociclibDRUGApproved medication
fulvestrantDRUGApproved medication
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Eligibility Criteria

Age Range18 Years to 100 Years
SexALL
Healthy VolunteersNo
Study Sites33

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 dis...

Countries:United StatesAustraliaCanadaChinaCzechiaDenmarkFranceGermanyIsraelItalyJapanSingaporeSouth KoreaSpainTaiwanUnited Kingdom
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Competitive Landscape -Breast Cancer 609 trials (matched to "Advanced HR+/HER2- Breast Cancer")

Recent Changes (Last 90 Days)

LOWAug 27, 2026NCT06726148lastUpdatePostDate: changed
LOWAug 27, 2026NCT06726148lastUpdatePostDate: changed

Frequently asked questions about ECI830

What is ECI830?

ECI830 is an investigational small molecule developed by Novartis AG for advanced HR+/HER2- breast cancer and other advanced solid tumors. It is being studied as a single agent and in combination with other therapies. ECI830 is in Phase 1 clinical development and has not been approved by the FDA.

What is ECI830 used for in advanced HR+/HER2- breast cancer?

ECI830 is being evaluated for the treatment of advanced HR+/HER2- breast cancer, meaning hormone receptor positive and HER2 negative disease. The Phase 1 study also enrolls patients with advanced CCNE1-amplified solid tumors and extensive-stage small cell lung cancer. ECI830 remains investigational and is not approved for any indication.

Who is developing ECI830?

ECI830 is being developed by Novartis AG, which trades on the New York Stock Exchange under the ticker NVS. Novartis is the sponsor of the Phase 1 clinical program evaluating ECI830 in advanced HR+/HER2- breast cancer and other advanced solid tumors.

What phase is ECI830 in?

ECI830 is in Phase 1 clinical development. It is an investigational small molecule and has not received FDA approval. The Phase 1 program is currently recruiting participants and is designed to evaluate ECI830 as a single agent and in combination in patients with advanced solid tumors.

What clinical trials is ECI830 in?

ECI830 is being studied in the Phase 1 trial NCT06726148, titled Study of ECI830 Single Agent or in Combination in Patients With Advanced HR+/HER2- Breast Cancer and in Patients With Other Advanced Solid Tumors. The trial is recruiting, is controlled and randomized, and plans to enroll 280 participants across 16 countries.

Who can enroll in the ECI830 Phase 1 trial?

The NCT06726148 trial enrolls adults aged 18 years and older of any sex. It includes patients with advanced HR+/HER2- breast cancer, advanced CCNE1-amplified solid tumors, and extensive-stage small cell lung cancer. Healthy volunteers are not eligible, and enrollment is biomarker selected for the relevant tumor types.