A Clinical Trial of SIBP-A10 Injection in the Treatment of Advanced Malignant Tumor Subjects.

This study is an open label, dose escalation, dose expansion, and indication expansion study to evaluate safety, tolerability, pharmacokinetics, preliminary anti-tumor efficacy, immunogenicity, impact on QT/QTc interval, and explore potential biomarkers of SIBP-A10 for injection in subjects with advanced metastatic tumors.

This study is divided into three stages and is planned to be set up seven dose groups, including 0.5, 1.5, 3, 5, 7, 10 and 15 mg/kg. The first stage is the dose escalation stage, which will start from the first and second doses for enrollment. If necessary, a 3+3 dose escalation design will be used. At least 19 subjects will be enrolled, and the specific sample size should be adjusted according to the subjects' tolerance level. The second stage is the dose expansion stage, where two or more doses are selected to enter the dose expansion phase, and at least 20 subjects will be enrolled in each dose group for dose expansion. The third stage is the indication expansion stage, where phase II recommended dose (RP2D) is preliminarily determined based on the escalation and expansion of dosage in the early stage. Using RP2D for indication expansion, we plan to expand four indication cohorts, with at least 40 subjects selected for each cohort.