GV20-0251 Combined With Sintilimab for Neoadjuvant Treatment of Resectable Head and Neck Squamous Cell Carcinoma: A Prospective, Single-Arm Clinical Study
The goal of this clinical trial is to learn whether neoadjuvant GV20-0251 combined with sintilimab is safe and tolerable, and to explore its preliminary antitumor activity, in adults with resectable, locally advanced head and neck squamous cell carcinoma at West China Hospital, Sichuan University. The main questions it aims to answer are: What is the incidence of dose-limiting toxicities (DLTs) during neoadjuvant treatment with GV20-0251 in combination with sintilimab in the dose-escalation phase? What is the major pathologic response (MPR) rate in resected specimens after neoadjuvant treatment? Participants will receive two 3-week cycles of neoadjuvant therapy using a 3+3 dose-escalation design (GV20-0251 at 10 mg/kg or 20 mg/kg plus fixed-dose sintilimab 200 mg, both given by intravenous infusion on Day 1 of each cycle), undergo protocol-specified safety monitoring with adverse events graded per CTCAE v5.0 and routine clinical assessments and laboratory tests, proceed to definitive surgery after neoadjuvant therapy, receive postoperative adjuvant therapy, and complete post-treatment safety follow-up and protocol-defined long-term follow-up for disease status and survival outcomes.
⁃ Age 18 to 70 years, inclusive, at the time of signing informed consent; male or female;
⁃ Histologically confirmed head and neck squamous cell carcinoma (HNSCC) meeting all of the following conditions:
• . Newly diagnosed, locally advanced HNSCC without distant metastasis (excluding nasopharyngeal, salivary gland, and thyroid malignancies): Non-oropharyngeal HNSCC and HPV-negative oropharyngeal cancer: Stage III, IVA, or IVB;HPV-positive oropharyngeal cancer: Stage II or III；HPV status for oropharyngeal cancer will be determined by p16 immunohistochemistry; 2). Assessed by the head and neck surgeon as resectable and amenable to surgical treatment; 3.Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1; 4.Adequate organ and bone marrow function, defined as follows:
⁃ Hematologic function:Absolute neutrophil count (ANC) ≥1.5 × 10\^9/L;Platelet count (PLT) ≥80 × 10\^9/L;Hemoglobin ≥8 g/dL.
⁃ Hepatic function:Aspartate aminotransferase (AST) ≤2.5 × upper limit of normal (ULN);Alanine aminotransferase (ALT) ≤2.5 × ULN;Total bilirubin (TBIL) ≤1.5 × ULN;
⁃ Serum albumin ≥2.8 g/dL;
⁃ Renal function:Serum creatinine ≤1.5 × ULN, orCreatinine clearance (CrCl) \>60 mL/min;
⁃ Coagulation function:International normalized ratio (INR) ≤1.5;Activated partial thromboplastin time (APTT) ≤1.5 × ULN; 5.Participants must voluntarily agree to participate in the study, sign the informed consent form, and be able to comply with protocol-required visits and study procedures.