A Study of BL-B01D1+PD-1 Monoclonal Antibody in Patients With Unresectable Locally Advanced or Recurrent Metastatic Triple-negative Breast Cancer

A Phase II Clinical Trial to Evaluate the Efficacy and Safety of BL-B01D1+PD-1 Monoclonal Antibody Combination Therapy in Patients With Unresectable Locally Advanced or Recurrent Metastatic Triple-negative Breast Cancer

This phase II study is a clinical study to explore the efficacy and safety of BL-B01D1 combined with PD-1 monoclonal antibody in patients with unresectable locally advanced or recurrent metastatic triple-negative breast cancer.

Study Overview

• Status: Recruiting
• Conditions: Triple-negative Breast Cancer
• Intervention / Treatment: Drug: BL-B01D1; Drug: PD-1 Monoclonal Antibody

• Study Type: Interventional
• Enrollment (Estimated): 52
• Phase: Phase 2

Contacts and Locations

• Study Contact: Name: Sa Xiao, PHD; Phone Number: 15013238943; Email: xiaosa@baili-pharm.com

Study Locations

• China
  • Shanghai
    • Shanghai, Shanghai, China
      • Recruiting
      • Fudan University Shanghai Cancer Center
      • Contact: Jiong Wu
      • Principal Investigator: Jian Zhang
      • Principal Investigator: Jiong Wu

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Voluntarily sign the informed consent and follow the requirements of the protocol;
2. Age: ≥18 years old and ≤75 years old;
3. Expected survival time ≥3 months;
4. ECOG 0 or 1;
5. Subjects with histologically and/or cytologically confirmed, inoperable locally advanced or recurrent or metastatic triple-negative breast cancer;
6. Patients should not have received previous systemic therapy for unresectable, locally advanced, recurrent, or metastatic triple-negative breast cancer;
7. A archived tumor tissue specimen or fresh tissue specimen of the primary or metastatic lesion within 2 years must be provided;
8. Must have at least one place in accordance with RECIST v1.1 define measurable lesions;
9. No blood transfusion, no use of cell growth factors and/or platelet raising drugs within 14 days before screening, and the organ function level must meet the requirements;
10. Toxicity of previous antineoplastic therapy has returned to ≤ grade 1 defined by NCI-CTCAE v5.0;
11. For premenopausal women with childbearing potential, a pregnancy test must be performed within 7 days before the initiation of treatment, the serum or urine pregnancy test must be negative, and the patient must not be lactating; All enrolled patients should take adequate barrier contraception during the entire treatment cycle and for 6 months after the end of treatment.

Exclusion Criteria:

1. ADC drugs that have received topoisomerase I inhibitors as small molecule toxins;
2. Palliative radiotherapy within 2 weeks before the first dose;
3. Patients with checkpoint inhibitors prior to neoadjuvant/adjuvant chemotherapy;
4. Use of an immunomodulatory drug within 14 days before the first dose of study drug;
5. The history of severe cardiovascular and cerebrovascular diseases in the past six months was screened;
6. QT prolongation, complete left bundle branch block, III degree atrioventricular block, frequent and uncontrollable arrhythmia;
7. Active autoimmune and inflammatory diseases;
8. Receiving long-term systemic corticosteroid therapy, etc., before the first dose;
9. Other malignant tumors that progressed or required treatment within 5 years before the first dose;
10. Presence of: a) poorly controlled diabetes mellitus before starting study treatment; b) severe complications associated with diabetes mellitus; c) a glycated hemoglobin level of 8% or more; d) hypertension poorly controlled by two antihypertensive drugs; e) history of hypertensive crisis or hypertensive encephalopathy;
11. Present grade ≥2 radiation pneumonitis according to the RTOG/EORTC definition; Patients with current ILD;
12. Complicated with pulmonary diseases leading to clinically severe respiratory impairment;
13. 6 months prior to screening needs treatment intervention unstable thrombotic events;
14. Patients with active central nervous system metastases;
15. Patients with massive or symptomatic effusions or poorly controlled effusions;
16. Allergic history to recombinant humanized antibody or human-mouse chimeric antibody or allergic to any excipients of the test drug;
17. Prior organ transplantation or allogeneic hematopoietic stem cell transplantation;
18. HIV antibody positive, active tuberculosis, active hepatitis B virus infection, or active hepatitis C virus infection;
19. Serious infection within 4 weeks before the first dose of study drug; Signs of pulmonary infection or active pulmonary inflammation within 4 weeks;
20. Participated in another clinical trial within 4 weeks before the first dose;
21. Patients with superior vena cava syndrome should not be rehydrated;
22. Have a history of psychotropic substance abuse with an inability to quit or a history of severe neurological or psychiatric illness;
23. Imaging examination showed that the tumor had invaded or wrapped the large thoracic vessels;
24. Serious unhealed wound, ulcer, or fracture within 4 weeks before signing the informed consent;
25. Clinically significant bleeding or obvious bleeding tendency within 4 weeks before signing the informed consent;
26. Subjects who are scheduled to receive live vaccine or receive live vaccine within 28 days before the first dose;
27. Other circumstances considered by the investigator to be inappropriate for participation in the trial.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: BL-B01D1+PD-1 Monoclonal Antibody; Participants receive BL-B01D1+PD-1 Monoclonal Antibody as intravenous infusion for the first cycle (3 weeks). Participants with clinical benefit could receive additional treatment for more cycles. The administration will be terminated because of disease progression or intolerable toxicity occurring or other reasons.	Drug: BL-B01D1; Administration by intravenous infusion on D1 and D8, or D1 for a cycle of 3 weeks.; Other Names: BMS-986507; iza-bren; izalontamab brengitecan; Drug: PD-1 Monoclonal Antibody; Administration by intravenous infusion for a cycle of 3 weeks (Q3W).

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Recommended Phase II Dose (RP2D)	The RP2D is defined as the dose level chosen by the sponsor (in consultation with the investigators) for phase II study, based on safety, tolerability, efficacy, PK, and PD data collected during the dose escalation study of BL-B01D1.	Up to approximately 24 months
Objective Response Rate (ORR)	Objective response rate (ORR) is defined as the number of CR and PR in the treatment and control groups divided by the number of that group in the full analysis set (FAS).	Up to approximately 24 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Disease Control Rate (DCR)	Disease Control Rate (DCR) : Percentage of all randomized subjects who rated the best overall response (BOR) as complete response (CR), partial response (PR), and disease stabilization (SD) according to RECIST 1.1 criteria.	Up to approximately 24 months
Duration of Response (DOR)	Duration of Response (DOR) : defined as the period from the date when tumor response is first recorded to the date when objective tumor progression is first recorded or the date of death.	Up to approximately 24 months
Treatment Emergent Adverse Event (TEAE)	TEAE is defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally emerging, or any worsening (i.e., any clinically significant adverse change in frequency and/or intensity) of a pre-existing condition during the treatment of BL-B01D1. The type, frequency and severity of TEAE will be evaluated during the treatment of BL-B01D1.	Up to approximately 24 months
Progression-free survival (PFS)	Progression-free survival (PFS) as assessed by BIRC is defined as the time between the date subjects are randomized and the first observation of disease progression (based on BICR's image-based assessment) or death.	Up to approximately 24 months

Collaborators and Investigators

• Sponsor: Sichuan Baili Pharmaceutical Co., Ltd.
• Collaborators: Baili-Bio (Chengdu) Pharmaceutical Co., Ltd.
• Investigators: Principal Investigator: Jian Zhang, Fudan University; Principal Investigator: Jiong Wu, Fudan University

Study record dates

Study Major Dates

• Study Start (Actual): August 2, 2024
• Primary Completion (Estimated): July 1, 2026
• Study Completion (Estimated): July 1, 2026

Study Registration Dates

• First Submitted: June 18, 2024
• First Submitted That Met QC Criteria: June 18, 2024
• First Posted (Actual): June 24, 2024

Study Record Updates

• Last Update Posted (Actual): May 7, 2025
• Last Update Submitted That Met QC Criteria: May 5, 2025
• Last Verified: May 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms by Site; Neoplasms; Skin Diseases; Breast Diseases; Breast Neoplasms; Triple Negative Breast Neoplasms; Immunologic Factors; Physiological Effects of Drugs; Antibodies; Antibodies, Monoclonal
• Other Study ID Numbers: BL-B01D1-204-04

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No