A Study of BL-B16D1 in Patients With Recurrent or Metastatic Head and Neck Squamous Cell Carcinoma and Other Solid Tumors

Inclusion criteria

• Sign the informed consent form voluntarily and follow the protocol requirements;
• Gender is not limited;
• Age: ≥18 years old and ≤75 years old (phase Ia); ≥18 years old (phase Ib);
• Expected survival time ≥3 months;
• Patients with pathologically and/or cytologically confirmed recurrent or metastatic head and neck squamous cell carcinoma and other solid tumors who failed or could not receive standard treatment;
• Agreed to provide primary tumors or metastases 3 years archive of tumor tissue samples or fresh tissue samples;
• Must have at least one accord with RECIST v1.1 define measurable lesions;
• ECOG physical status 0 or 1;
• The toxicity of previous antineoplastic therapy has returned to ≤ grade 1 as defined by NCI-CTCAE v5.0;
• No severe cardiac dysfunction, left ventricular ejection fraction ≥50%;
• The organ function level must meet the requirements if the patient has not received blood transfusion or hematopoietic stimulating factor therapy within 14 days before screening;
• Blood coagulation function: international standardization ratio (INR) 1.5 or less, and the part activated clotting time (APTT) live enzymes ULN 1.5 or less;
• Urinary protein ≤2+ or ≤1000mg/24h;
• For premenopausal women with childbearing potential, a pregnancy test must be performed within 7 days before starting treatment, serum pregnancy must be negative, and the patient must not be lactating; All the patients (no matter male or female) shall be 6 months after the end of the treatment period and adequate precautions.

Exclusion criteria

• Antineoplastic therapy within 4 weeks or 5 half-lives before the first dose; Mitomycin and nitrosoureas were administered within 6 weeks before the first dose; Oral drugs such as fluorouracil;
• History of severe heart disease;
• QT prolongation, complete left bundle branch block, III degree atrioventricular block;
• Active autoimmune and inflammatory diseases;
• Before the first delivery within 5 years diagnosed as other malignant tumor;
• Hypertension poorly controlled by two antihypertensive drugs (systolic blood pressure > 150 mmHg or diastolic blood pressure > 100 mmHg);
• Patients with poor glycemic control;
• Present with grade ≥1 radiation pneumonitis according to the RTOG/EORTC definition; Previous history of ILD or current ILD, or suspicion of such disease during screening;
• Complicated with pulmonary diseases leading to clinically severe respiratory function impairment;
• There is activity of the central nervous system symptoms;
• Patients with a history of allergy to recombinant humanized or human-mouse chimeric antibodies or to any of the excipients of BL-B16D1;
• Before transplant or allogeneic hematopoietic stem cell transplantation (Allo - HSCT);
• Previous anthracycline-based adjuvant therapy (new), the cumulative dose anthracycline-based drugs > 360 mg/m2;
• Human immunodeficiency virus antibody positive, active tuberculosis, active hepatitis B virus infection or active hepatitis C virus infection;
• Severe infection occurred within 4 weeks before the first dose; Signs of pulmonary infection or active pulmonary inflammation within 2 weeks before the first dose;
• Patients with massive or symptomatic effusions or poorly controlled effusions;
• Had participated in another clinical trial within 4 weeks before the first dose (calculated from the time of the last dose);
• Had the following ocular diseases: a. active infection or corneal ulcer; b. monocular vision; c. a history of corneal transplantation; d. Contact lens dependence; e. Uncontrolled glaucoma; f. Uncontrolled or progressive retinopathy, wet macular degeneration, etc.;
• Other circumstances that the investigator deemed inappropriate for participation in the trial.