A Study of BL-B01D1, SI-B003 and BL-B01D1+SI-B003 in Patients With Extensive Stage Small Cell Lung Cancer

NCT05924841 | Recruiting Phase 2

• 1 other identifier: BL-B01D1-SI-B003-201-02
• Study Type: interventional
• Target: 100
• Locations: 1 country
• Sites: 1

Brief Summary

This phase II study is designed to investigate the efficacy and safety of BL-B01D1 monotherapy, SI-B003 monotherapy, and BL-B01D1+SI-B003 combination therapy in patients with extensive-stage small cell lung cancer.

Conditions

Small Cell Lung Cancer

Outcome Measures

Primary Outcomes (2)

• Objective response rate (ORR)

  ORR is defined as the percentage of participants, who has a CR (disappearance of all target lesions) or PR (at least a 30% decrease in the sum of diameters of target lesions). The percentage of participants who experiences a confirmed CR or PR is according to RECIST 1.1.

  Up to approximately 24 months

• 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 SI-B003.

  Up to approximately 24 months

Secondary Outcomes (4)

• Progression-free survival (PFS)

  Up to approximately 24 months

• Disease control rate (DCR)

  Up to approximately 24 months

• Duration of response (DOR)

  Up to approximately 24 months

• Treatment-Emergent Adverse Event (TEAE)

  Up to approximately 24 months

Study Arms (1)

Study treatment

EXPERIMENTAL

Participants received BL-B01D1 monotherapy, SI-B003 monotherapy or BL-B01D1 plus SI-B003 dual therapy in the first cycle (3 weeks). Participants who had a clinical benefit could receive additional cycles of additional treatment. Administration will be discontinued because of disease progression or intolerable toxicity or for other reasons.

Drug: BL-B01D1; Drug: SI-B003

Interventions

BL-B01D1 DRUG

Administration by intravenous infusion

Also known as: iza-bren, izalontamab brengitecan, BMS-986507

Study treatment

SI-B003 DRUG

Administration by intravenous infusion

Study treatment

Eligibility Criteria

• Age: 18 Years - 75 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• All subjects voluntarily participated in the study and signed informed consent;
• Male or female aged ≥18 years and ≤75 years;
• Expected survival time ≥3 months;
• ECOG 0-1;
• Patients with extensive-stage small-cell Lung cancer confirmed by histopathology and/or cytology (according to Veterans Administration Lung Study Group (VALG) staging);
• Cohort\_A cohort of patients with extensive-stage small cell lung cancer who had failed or were intolerant to 3 or more lines of systemic antitumor therapy. The so-called intolerance refers to the patients who have received standard treatment and have grade 3-4 adverse reactions, and the patients refuse to continue the original regimen.
• Cohort\_B Stage I subjects with previous failure or intolerance to standard therapy for extensive-stage small cell lung cancer;
• Cohort\_B Stage II patients who have not received any previous systemic anti-tumor therapy for extensive-stage small cell lung cancer;

You may not qualify if:

• Must have at least one measurable lesion according to RECIST v1.1 definition; Lesions that had been previously treated with radiation could be included in a measurable lesion only if there was definite disease progression after radiation therapy.
• Organ function level must meet the following criteria:
• Blood routine: hemoglobin (HGB) ≥ 90g/L; Absolute neutrophil count (NEUT) ≥ 1.5×10 9 /L; Platelet count (PLT) ≥ 100×10 9 /L;
• Renal function: creatinine (Cr) ≤1.5 ULN, or creatinine clearance (Ccr) ≥50 mL/min (according to Cockcroft and Gault formula).
• Liver function: total bilirubin (TBIL≤1.5 ULN), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were all ≤2.5 ULN, and AST and ALT were both ≤5.0 ULN when liver metastasis was present;
• coagulation function: international normalized ratio (INR) ≤1.5 and activated partial thromboplastin time (APTT) ≤1.5ULN;
• no severe cardiac dysfunction with left ventricular ejection fraction ≥50%;
• proteinuria ≤2+ or ≤1000mg/24h;
• Toxicity of previous antineoplastic therapy has returned to ≤ grade 1 as defined by NCI-CTCAE v5.0 (except for asymptomatic laboratory abnormalities such as ALP elevation, hyperuricemia, and hyperglycemia, as judged by the investigator, and toxicity without safety risk, such as alopecia, grade 2 peripheral neurotoxicity, or decreased hemoglobin ≥90g/L, as judged by the investigator);
• For premenopausal women with childbearing potential, a pregnancy test must be performed within 7 days before the start 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 whole treatment cycle and for 6 months after the end of treatment.
• Previous treatment with EGFR and HER3 monoclonal antibodies;
• Antineoplastic therapy, including chemotherapy, biologic therapy, immunotherapy, definitive radiotherapy, major surgery (investigator-defined), or targeted therapy (including small-molecule tyrosine kinase inhibitors), has been administered within 4 weeks or 5 half-life cycles (whichever is shorter) before the first dose; Oral fluorouracil drugs such as S-1, capecitabine, or palliative radiotherapy within 2 weeks before the first dose;
• Cohort\_B Stage II patients who had received any previous systemic therapy for extensive-stage SCLC were not eligible for the study;
• Cohort\_B with a history of immunotherapy and grade ≥3 irAE or grade ≥2 immune-related myocarditis, excluded;
• Cohort\_B with history of use of immunomodulatory drugs (including but not limited to thymosin, interleukin-2, interferon, etc.) within 14 days before the first dose of study drug was excluded.

Sponsors & Collaborators

• Sichuan Baili Pharmaceutical Co., Ltd.: lead

Study Sites (1)

Jilin Cancer Hospital

Changchun, Jilin, 130000, China

RECRUITING

MeSH Terms

Conditions

Small Cell Lung Carcinoma

Condition Hierarchy (Ancestors)

Carcinoma, Bronchogenic; Bronchial Neoplasms; Lung Neoplasms; Respiratory Tract Neoplasms; Thoracic Neoplasms; Neoplasms by Site; Neoplasms; Lung Diseases; Respiratory Tract Diseases

Study Officials

• Ying Cheng, MB

  Jilin Provincial Tumor Hospital

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Sa Xiao, PHD

CONTACT

+8615013238943; xiaosa@baili-pharm.com

Study Design

• Study Type: interventional
• Phase: phase 2
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: June 21, 2023
• First Posted: June 29, 2023
• Study Start: November 10, 2023
• Primary Completion (Estimated): December 1, 2026
• Study Completion (Estimated): December 1, 2027
• Last Updated: September 26, 2025

Record last verified: 2025-09

Locations

CN (1)