A Phase Ib/II Study of BM230 in Combination With PD-1 Inhibitor for HER2-related Advanced Solid Tumors

Inclusion Criteria: common inclusion criteria (Phase Ib and Phase II) (Criteria 1 to 10) 1. Informed of the study before the start of the study and voluntarily sign their name and date on the informed consent form (ICF) 2. Males and Females≥18 years old（at the time consent is obtained） 3. Eastern Cooperative Oncology Group Performance Status (ECOG PS) score of 0 to 1 4. Life expectancy of ≥ 3 months 5. Adequate organ and bone marrow function, defined as: * Bone marrow function: hemoglobin ≥ 90 g/L (have not received blood transfusion or erythropoietin treatment within 14 days before the first dose); absolute neutrophil count ≥ 1.5×109/L (have not received granulocyte colony-stimulating factor or granulocyte-macrophage colony-stimulating factor treatment within 14 days before the first dose); platelet count ≥ 100×109/L ((have not received platelet transfusion, thrombopoietin, or interleukin-11 treatment within 14 days before the first dose) * Coagulation function: activated partial thromboplastin time and international normalized ratio ≤ 1.5 × ULN * Liver function (based on the normal range at the study site): TBIL ≤ 1.5 × ULN if no demonstrable liver lesion(s) (primary or metastases), \< 4 × ULN for patients with Gilbert syndrome, or ≤ 3 × ULN in the presence of liver lesion(s); ALT and AST ≤ 3 × ULN if no demonstrable liver lesion(s) (primary or metastases), or ≤ 5 × ULN in the presence of liver lesion(s) * Renal function (based on the normal range at the study site): creatinine clearance (CrCl) calculated by the Cockcroft-Gault formula ≥ 50 mL/min, or 24-h urine CrCl ≥ 50 mL/min * Cardiac function: LVEF ≥ 50% 6. Female patients of childbearing potential must agree to use a highly effective form of contraception and not donate, or retrieve for their own use, ova from the time of screening and throughout the study period, and for at least 6 months after the last dose of study drug; a negative pregnancy test must be obtained within 7 days before the first dose. Male patients must agree to use a highly effective form of contraception and not freeze or donate sperm from the time of screening and throughout the study period, and for at least 6 months after the last dose of study drug 7. Able and willing to comply with protocol visits and procedures 8. Have HER2 expression (IHC 1+, 2+, or 3+) determined by immunohistochemistry, or HER2 amplification (NGS report indicating HER2 amplification), or (for NSCLC) HER2 exon 8, exon 19, or exon 20 mutations. For Australia, only patients with cancer types covered by Australian Medicare for HER2 expression, amplification, or mutation testing, and/or patients with known HER2 expression, amplification, or mutation identified via any other program are to be considered 9. Willing to provide archived or fresh tumor tissue samples. Patients who are unable to provide tumor samples or have insufficient samples may be eligible on a case-by-case basis after discussion with the sponsor 10. Have at least 1 measurable target tumor lesion according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 Additional inclusion criteria for Phase II (Criteria 11 to 14) 11. Cohort A: Unresectable or metastatic high microsatellite instability (MSI-H) or mismatch repair-deficient (dMMR) advanced solid tumors in adult patients: * Patients with advanced colorectal cancer who have experienced disease progression following prior treatment with fluoropyrimidines, oxaliplatin, and irinotecan * Patients with other advanced solid tumors who have experienced disease progression after prior treatment and for whom no satisfactory alternative treatment is available 12. Cohort B: Esophageal squamous cell carcinoma: * Locally advanced or metastatic esophageal squamous cell carcinoma that has progressed or is intolerant following first-line standard chemotherapy 13. Cohort C: Urothelial carcinoma: * Locally advanced or metastatic urothelial carcinoma that has progressed within 12 months of neoadjuvant or adjuvant platinum-containing chemotherapy, or after failure of platinum-based chemotherapy 14. Other tumor types: * Locally advanced or metastatic advanced solid tumors that have progressed or are intolerant following first-line standard chemotherapy, including cholangiocarcinoma, endometrial carcinoma, cervical cancer, ovarian cancer, etc Exclusion Criteria: Patients who meet any of the following criteria will NOT be included in the study: 1. Have received prior treatment with anti-HER2 antibody agents (excluding HER2 ADC agents). 2. Preexisting autoimmune disease (except for patients with vitiligo) needing treatment with systemic immunosuppressive therapy for more than 28 days within the last 3 years, or clinically relevant immuno-deficiency diseases (eg, agammaglobulinemia or congenital 3. Multiple primary malignancies within 3 years, except adequately resected non-melanoma skin cancer, curatively treated in situ disease, or other curatively treated solid tumors (including but not limited to adequately treated thyroid cancer, carcinoma in situ of the cervix, basal or squamous cell skin cancer, or ductal carcinoma in situ of the breast treated with curative surgery) 4. Insufficient washout period of the prior anticancer treatment before the first dose of the investigational product, defined as follows: * Anti-neoplastic treatments such as chemotherapy, biological therapy, endocrine therapy and immunotherapy within 3 weeks before the first dose * Palliative radiotherapy for tumors within 2 weeks before the first dose * Endocrine therapy for tumors within 2 weeks before the first dose * Chinese herbal medicine or Chinese patent medicine for tumor indications within 2 weeks before the first dose * Other unmarketed investigational drugs or treatments within 4 weeks before the first dose (fluoropyrimidines and small-molecule targeted drugs: within 2 weeks before the first dose or within 5 half-lives of the drug, …

Reproduced word-for-word from the public registry record — the study team can answer questions about it.