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

Registration Number
NCT06726148
Lead Sponsor
Novartis Pharmaceuticals
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.
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Detailed Description

This is a first-in-human, open-label, phase I/II, multi-center study consisting of an ECI830 single agent treatment arm in patients with advanced HR+/HER2- breast cancer or other advanced solid tumors harboring CCNE1 amplification and a combination treatment arm of ECI830 with ribociclib and fulvestrant in patients with advanced breast cancer. Single agent e...

Recruitment & Eligibility

Status
NOT_YET_RECRUITING
Sex
All
Target Recruitment
280
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.

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.

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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.

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Study & Design

Study Type
INTERVENTIONAL
Study Design
SINGLE_GROUP
Arm && Interventions
GroupInterventionDescription
ECI830 Single Agent (Arm A)ECI830Phase I
Dose Escalation Combination ECI830 + ribociclib + fulvestrant (Arm B)ECI830Phase I
Dose Escalation Combination ECI830 + ribociclib + fulvestrant (Arm B)ribociclibPhase I
Dose Escalation Combination ECI830 + ribociclib + fulvestrant (Arm B)fulvestrantPhase I
Ribociclib in combination with fulvestrant (Arm C)ribociclibPhase II
Ribociclib in combination with fulvestrant (Arm C)fulvestrantPhase II
ECI830 in combination with fulvestrant (Arm D)ECI830Phase II
ECI830 in combination with fulvestrant (Arm D)fulvestrantPhase II
ECI830 in combination with ribociclib and fulvestrant (Arm E)ECI830Phase II
ECI830 in combination with ribociclib and fulvestrant (Arm E)ribociclibPhase II
ECI830 in combination with ribociclib and fulvestrant (Arm E)fulvestrantPhase II
ECI830 in combination with ribociclib and fulvestrant (Arm F)ECI830Phase II
ECI830 in combination with ribociclib and fulvestrant (Arm F)ribociclibPhase II
ECI830 in combination with ribociclib and fulvestrant (Arm F)fulvestrantPhase II
Primary Outcome Measures
NameTimeMethod
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, e...

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 discontinuations2 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) v1.16 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 Outcome Measures
NameTimeMethod
Phase I and II: Progression Free Survival (PFS) per RECIST v1.12 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.

Phase I and II: Area under the plasma concentration-time curve (AUC) of ECI830 and ribociclibFrom 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.

Phase I and II: Maximum observed plasma concentration (Cmax) of ECI830 and ribociclibFrom 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.

Phase I and II: Best overall response (BOR) per RECIST v1.12 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.

Phase I and II: Overall response rate (ORR) per RECIST v1.12 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.

Phase I and II: Disease control rate (DCR) per RECIST v1.12 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.

Phase I and II: Clinical benefit rate (CBR) per RECIST v1.12 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.

Phase II: Duration of Response (DOR) per RECIST v1.12 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.

Phase II: Overall Survival (OS)2 years

OS is defined as the time between the date of randomization to the date of death due to any cause.

Phase II: 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 II: Number of participants with dose interruptions, reductions and discontinuations2 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.

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