PARP Inhibitor With CDK4/6 Inhibitor and Endocrine Therapy in HR+/ HER2-Advanced Breast Cancer

Fudan University

Status and phase: Enrolling; Phase 2

Conditions: Breast Cancer Metastatic

Treatments: Drug: Fluzoparib; Drug: Fulvestrant/AI; Drug: Dalpiciclib

Study type: Interventional

Funder types: Other

Identifiers

NCT05759546

BCTOP-L-M03

Details and patient eligibility

About

This study is a prospective, open-label, phase II clinical study for patients with HR+/HER2- advanced breast cancer.

Full description

Patients with SNF3 subtype of HR+/HER2- advanced breast cancer confirmed by the Department of Pathology and Key Laboratory of Breast Cancer of Fudan University Affiliated Cancer Hospital are planned to be enrolled. The main purpose is to evaluate efficacy of PARP inhibitor in SNF3 subtype of HR+/HER2- advanced breast cancer and prepare for subsequent randomized controlled phase III clinical studies with larger sample size.

Enrollment: 200 estimated patients

Sex: Female

Ages: 18 to 75 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Females ≥18 years and ≤ 75 years old;
• Histologically confirmed HR + / HER2- invasive breast cancer (specific definition: immunohistochemical detection of ER> 10% tumor cell positive is defined as ER positive, PR> 10% tumor cell positive is defined as PR positive, ER and / or PR Positive is defined as HR positive; HER2 0-1 + or HER2 is ++ but negative followed by FISH detection, no amplification, defined as HER2 negative);
• Subtype of similarity network fusion-3 (SNF-3) confirmed by the Department of Pathology and Key Laboratory of Breast Cancer of Fudan University Affiliated Cancer Hospital • Locally advanced breast cancer (incapable of radical local treatment) or recurrent metastatic breast cancer;
• Measurable disease according to Response Evaluation Criteria in Solid Tumors v1.1 (RECIST v1.1); or unmeasurable lytic or mixed (osteolytic + osteoblastic) bone lesions in the absence of measurable lesions;
• Has adequate bone marrow function: absolute neutrophil count > 1.5x10ˆ9 /L; platelet count > 75x10ˆ9 /L, hemoglobin > 9g/dL;
• Patients had received no previous chemotherapy or targeted therapy for metastatic disease
• Has adequate liver function and kidney function: serum creatinine
• ECOG score ≤ 2 and life expectancy ≥ 3 months;
• Participants voluntarily joined the study, has signed informed consent before any trial related activities are conducted, has good compliance and has agreed to follow-up.

Exclusion criteria

• Treatment with chemotherapy, radiotherapy, immunotherapy or surgery (outpatient clinic surgery excluded) for metastatic disease
• Symptomatic, untreated, or actively progressing CNS metastases(glucocorticoids or mannitol needed to control symptoms);
• Significant cardiovascular disease(including congestive heart failure, angina pectoris, myocardial infarction or ventricular arrhythmia in the last 6 months);
• is pregnant or breast feeding;
• Malignant tumors in the past five years (except cured skin basal cell carcinoma and cervical carcinoma in situ).

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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200 participants in 2 patient groups

Cohort 1

Experimental group

Description:

In this cohort, a patient would receive Dalpiciclib(CDK4/6 inhibitor) combined with Fluzoparib(Parp inhibitor) and endocrine therapy.

Treatment:

Drug: Fulvestrant/AI

Drug: Dalpiciclib

Drug: Fluzoparib

Cohort 2

Active Comparator group

Description:

In this cohort, a patient would receive Dalpiciclib(CDK4/6 inhibitor) combined with endocrine therapy.

Treatment:

Drug: Fulvestrant/AI

Drug: Dalpiciclib