Cadonilimab in combined with gemcitabine and cisplatin in advanced biliary tract cancer (BicureX): A phase II, single-arm clinical trial
Abstract
e16158 Background: PD-1 or PD-L1 inhibitors plus chemotherapy as the first-line treatment has been proven to be effective in improving the prognosis of advanced biliary tract cancer (BTC) patients. However, there is still considerable demand for further improvement of BTC patients’ prognosis. This trial aims to evaluate the efficacy and safety of Cadonilimab (PD-1/CTLA-4, a bi-specific antibody) plus gemcitabine and cisplatin for patients with advanced BTC in first -line treatment. Methods: In this phase II, single-arm trial, we will enroll 65 patients with previously untreated, unresectable, locally advanced or metastatic BTC, including intrahepatic or extrahepatic cholangiocarcinoma (ICC/ECC) and gallbladder carcinoma (GBC). Participants received Cadonilimab (10 mg/kg, days 1, every three weeks) plus gemcitabine (1000 mg/m2, days 1, 8, Q3W), and cisplatin (25 mg/m2, days 1, 8, Q3W) for up to eight cycles, followed by Cadonilimab (10 mg/kg, days 1, Q3W) until disease progression or unacceptable toxicity. Treatment response was evaluated with image-based assessment according to response evaluation criteria insolid tumors (RECIST) version 1.1. by two experienced experts and further explored multiple methods, such as 3D visualisation and Spectral computed tomography Scan. The primary endpoint was the objective response rate (ORR); the secondary endpoints are disease control rate (DCR), progression-free survival (PFS), overall survival (OS), and safety. Exploratory endpoints…
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