Sacituzumab Govitecan Plus Bevacizumab in Metastatic TNBC

Phase 2Enrolling By InvitationNCT07359404

YING FAN60 enrolled

Overview

This is a single-arm, multicenter, Phase II clinical study aiming to explore the efficacy and safety of Sacituzumab Govitecan combined with Bevacizumab as a second-line or later treatment for patients with metastatic triple-negative breast cancer (mTNBC). The study will be conducted in 6-8 centers in China. The study is divided into two phases: a Safety Run-in Phase and a Dose Expansion Phase. In the Safety Run-in Phase (3-12 patients), three dose levels are planned to determine the recommended dose. The starting dose (Level 1) is Sacituzumab Govitecan 10 mg/kg (Days 1, 8) plus Bevacizumab 7.5 mg/kg (Day 1) every 21 days. Based on the occurrence of Dose-Limiting Toxicities (DLT) in the first cycle, the Safety Monitoring Committee (SMC) will decide whether to continue the current dose or de-escalate to Level 2 (Sacituzumab Govitecan 10 mg/kg + Bevacizumab 5 mg/kg) or Level 3 (Sacituzumab Govitecan 7.5 mg/kg + Bevacizumab 5 mg/kg). In the Dose Expansion Phase, 40-50 patients will be enrolled to receive the combination therapy at the recommended dose determined in the run-in phase. Efficacy will be evaluated every 2 cycles according to RECIST 1.1, and safety will be assessed continuously until disease progression or intolerable toxicity.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Advanced Breast Cancer

Sacituzumab Govitecan (SG)DRUG

Administered via intravenous infusion on Day 1 and Day 8 of each 21-day cycle. In the Safety Run-in phase, the starting dose is 10 mg/kg, with a potential de-escalation to 7.5 mg/kg based on Dose-Limiting Toxicity (DLT). In the Expansion phase, patients receive the determined recommended dose

BevacizumabDRUG

Administered by intravenous infusion on the first day of each 21-day cycle. In the safety trial phase, the starting dose is 7.5 mg/kg and can be reduced to 5 mg/kg depending on dose-limiting toxicity (DLT). During the expansion phase, patients receive the determined recommended dose

Eligibility

Sex: FEMALEMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Patients aged \> 18 years. 2. Pathologically confirmed recurrent or metastatic Triple-Negative Breast Cancer (TNBC). 3. ER and PR negativity is defined as \< 10% expression in tumor cells. HER2 negativity is defined as IHC 0, 1+, or IHC 2+ with FISH negative. Must have received at least one prior systemic therapy in the metastatic setting. 4. Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1. 5. Life expectancy of more than 3 months. 6. At least one measurable lesion according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. 7. Adequate organ function. 8. Sufficient washout period before screening (3 weeks from last chemotherapy, 4 weeks from last targeted therapy) Exclusion Criteria: 1. Prior treatment with Sacituzumab Govitecan or Bevacizumab. 2. Uncontrolled central nerve 3. Presence of other primary malignancies. 4. Severe infection, severe cardiac disease, autoimmune disease, or other conditions deemed unsuitable for anti-tumor therapy.

Outcomes

Primary Outcomes

Progression-Free Survival

Time frame: From start of treatment until disease progression or death, assessed up to approximately 32 months (based on study completion date of Dec 2026)

Incidence and Severity of Adverse Events (Safety)

Time frame: From start of treatment through 90 days after the last dose of study drug.

Secondary Outcomes

Objective Response Rate

Time frame: From start of treatment until disease progression or intolerance, assessed every 2 cycles, assessed up to approximately 32 months

Overall Survival

Time frame: From start of treatment until death, assessed up to approximately 32 months

Disease Control Rate

Time frame: From start of treatment until disease progression or intolerance, assessed up to approximately 32 months

Duration of Response

Time frame: From date of first response until disease progression or death,assessed up to approximately 32 months

6-month Progression-Free Survival Rate

Time frame: At 6 months after treatment initiation

6-month Overall Survival Rate