A Clinical Trial of SIBP-A19 Injection in the Treatment of Advanced Malignant Solid Tumor Patients

"SIBP-A19 formulation for injection. Strength: 1.0, 2.0, 3.2, 4.0, 4.8, 5.6, 6.4 and 8.0 mg/kg. Intravenous infusion administration, with a treatment cycle of every 21 days, administered once on the first day of each cycle. The dose escalation stage, 1mg/kg and 2mg/ kg were subjected to accelerated titration, where the safety was evaluated within 21 days after the first administration to one participant. If dose-limiting toxicity (DLT) occurred, the traditional 3+3 dose escalation method was immediately switched. If DLT does not occur, the next dose group will be explored. The third stage will use RP2D for further exploration."