A Clinical Trial to Evaluate Tolerability and Security of TQB2858 Injection in Subjects With Advanced Pancreatic Carcinoma

This study is divided into three phases: single-dose exploration, combination dosage exploration and cohort expansion. The Single-dose exploration stage aims to evaluate the tolerability of TQB2858 injection in subjects with advanced pancreatic carcinoma. The Combination dosage exploration stage aims to evaluate the tolerance of TQB2858 injection combined with chemotherapy in patients with metastatic pancreatic cancer. The cohort expansion phase aims to evaluate the preliminary efficacy of TQB2858 injection combined with gemcitabine, albumin paclitaxel, and with or without anlotinib in patients with metastatic pancreatic cancer，and to explore treatment-related biomarkers.