BRIDGE Study: Neoadjuvant Finotonlimab, Cetuximab, and Docetaxel in Resectable Recurrent HNSCC After Immunotherapy Progression

Overview

This is a multicenter, single-arm, phase II clinical study evaluating the efficacy and safety of neoadjuvant finotonlimab (anti-PD-1), cetuximab (anti-EGFR), and docetaxel in patients with resectable recurrent head and neck squamous cell carcinoma (HNSCC) who have progressed after prior PD-1(L1) inhibitor plus platinum-based therapy. A total of 42 patients (PD-L1 CPS at least 1) will be enrolled using Simon's two-stage design across 9 centers in China (Stage 1: 25 patients; Stage 2: 17 additional patients with 5% dropout). Enrolled patients will receive 3 cycles of neoadjuvant finotonlimab (200 mg, IV, Q3W), cetuximab (500 mg/m2, IV, Q3W), and docetaxel (75 mg/m2, IV, Q3W), followed by salvage surgery (3-4 weeks later), adjuvant radiotherapy +/- chemotherapy per NCCN/CSCO guidelines, and maintenance finotonlimab 200 mg + cetuximab 500 mg/m2 Q3W for up to 12 cycles or until disease progression or unacceptable toxicity. The primary endpoint is major pathological response (MPR) rate. Historical MPR is 14% with dual immunotherapy neoadjuvant therapy; target MPR is 30% (alpha=0.05, power=0.8, one-sided). Secondary endpoints include ORR, pCR, mOS, mPFS, DoR, 6-month and 12-month PFS rate, and safety (AEs/SAEs per CTCAE v5.0).

Recurrent head and neck squamous cell carcinoma (HNSCC) remains a significant clinical challenge, with recurrence rates of 40-60% after curative treatment. Salvage surgery is the standard of care, yet approximately 50% of patients experience re-recurrence within 2 years. For patients who have progressed on prior PD-1 inhibitor and platinum-based therapy, no standard neoadjuvant regimen exists. Finotonlimab (SCT-I10A) is a recombinant humanized anti-PD-1 monoclonal antibody approved by NMPA for first-line R/M HNSCC in combination with platinum-based chemotherapy. Phase III data showed mOS 14.1 months and ORR 39.9% (Nature Medicine, 2024). Cetuximab is an anti-EGFR monoclonal antibody approved for R/M HNSCC. Cetuximab plus taxane regimens showed ORR of 54.9-69.6% as second-line therapy after immunotherapy failure. Retrospective data suggest EGFR inhibition may enhance anti-tumor immune response and improve efficacy of PD-1 rechallenge (ORR 46.4%). Docetaxel is a standard taxane chemotherapeutic agent. This study investigates a novel neoadjuvant triplet regimen combining finotonlimab (immunotherapy), cetuximab (EGFR targeting), and docetaxel (chemotherapy) in resectable recurrent HNSCC after immunotherapy progression. TREATMENT REGIMEN: 1. Neoadjuvant: Finotonlimab 200 mg IV + Cetuximab 500 mg/m2 IV + Docetaxel 75 mg/m2 IV, Q3W, 3 cycles 2. Surgery: Salvage surgery 3-4 weeks after neoadjuvant completion 3. Adjuvant: IMRT (60-66 Gy/30f) +/- platinum-based chemotherapy per NCCN/CSCO 4. Maintenance: Finotonlimab 200 mg IV + Cetuximab 500 mg/m2 IV Q3W for 12 cycles or until progression/toxicity Simon's two-stage design: Stage 1 (25 patients; at least 3 MPR required to proceed) to Stage 2 (17 additional, total 42). H0 MPR=14%, H1 MPR=30% (alpha=0.05, power=0.8). If 9 or fewer total responses, the trial is considered negative.