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NCT06570031PHASE1ACTIVE_NOT_RECRUITING

ONO-4578-06:Phase I Study of ONO-4578 and Letrozole Plus CDK4 /6 Inhibitors in Breast Cancer

ONO-4578-06: Phase I , Open-label, Non-blind, First-line Endocrine Therapy With ONO-4578 and Standard Treatment Letrozole and CDK4/6 Inhibitors (Palbociclib or Abemaciclib) in Patients With Metastatic or Recurrent Postmenopausal Hormone Receptor-positive HER2-negative Breast Cancer

Sponsor: Ono Pharmaceutical Co., Ltd.

No open prediction endpoints

Endpoints are classified and published by ProgramSignal analysts.

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Key Facts

Study type
INTERVENTIONAL
Conditions
Hormone Receptor-positive Breast Cancer, HER2-negative Breast Cancer, Metastatic Breast Cancer, Recurrent Breast Cancer
Interventions
ONO-4578, letrozole, Palbociclib, abemaciclib
Enrollment
46 participants
Primary completion
Apr 2026
Study completion
Apr 2026
First posted
Aug 2024
Last updated
Jul 2025

Primary Endpoints (CT.gov)

Adverse events

Time frame: Through study completion, an average of 4 year

Serious adverse events

Time frame: Through study completion, an average of 4 year

Dose-limiting toxicity (Tolerability Confirmation part only)

Time frame: 28 days

Laboratory abnormality profile of Drugs as measured by incidence and severity of clinical laboratory abnormalities

Time frame: Through study completion, an average of 4 year

Secondary Endpoints

Overall response rate (ORR)

Disease control rate (DCR)

Clinical benefit rate (CBR)

Eligibility Criteria

Inclusion Criteria: 1. Patients with postmenopausal metastatic or recurrent breast cancer 2. Patients with ECOG Performance Status 0 to 1 3. ER-positive, PgR-positive and HER2-negative patients Exclusion Criteria: 1. Patients are unable to swallow oral medications 2. Patients with severe complication

✦ Analyst Commentary

Expert commentary on why this trial matters and what to watch for.

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Source

Open on ClinicalTrials.gov