TQB2618 Injection Combined With Penpulimab Injection in the Treatment of Patients With Recurrent/Metastatic Nasopharyngeal Carcinoma

Inclusion Criteria: * Histologically or cytologically confirmed nasopharyngeal carcinoma, stage IVb as defined by the AJCC TNM staging system for nasopharyngeal carcinoma, 8th edition in 2017 or subjects with recurrent nasopharyngeal carcinoma who were not suitable for local therapy (For neoadjuvant/adjuvant therapy and radical concurrent chemoradiotherapy, if the disease progresses during treatment or within 6 months after the treatment completion, it should be counted as a failure of first-line treatment of the original plan, and if it exceeds 6 months, it cannot be counted as first-line treatment failure. Alterations of treatment regimen due to drug intolerance are not defined as treatment failure). * The first part of enrolled patients shall also meet the following requirements: 1. At least received first-line treatment for recurrent/metastatic lesions, and the last anti-tumor treatment before enrollment had evidence of imaging progress in line with RECIST 1.1 standard; 2. At least have received platinum containing chemotherapy and immunocheckpoint inhibitors (anti-PD-1 monoclonal antibody/anti-PD-L1 monoclonal antibody, etc.) in the past and failed treatment, and there is evidence of imaging progress that meets the RECIST 1.1 standard. Platinum containing chemotherapy and immunotherapy can be used during palliative treatment for recurrent/metastatic lesions, or during radical treatment for locally advanced diseases. 3. Immunotherapy for recurrent/metastatic lesions shall not exceed 2 lines (For neoadjuvant/adjuvant therapy and radical concurrent chemoradiotherapy, if the disease progresses during treatment or within 6 months after the treatment completion, it should be counted as a failure of first-line treatment of the original plan, and if it exceeds 6 months, it cannot be counted as first-line treatment. Failure. Alterations of treatment regimen due to drug intolerance do not defined as treatment failure 4. For the latest immunotherapy before enrollment, if it is aimed at recurrence/metastasis, the best efficacy is at least SD (≥ 6 weeks) or confirmed PR or immunotherapy duration ≥ 12 weeks. * The second part of the enrolled patients also need to meet the following requirements: 1. Have not received systemic antitumor therapy for recurrent/metastatic nasopharyngeal carcinoma before; 2. No previous treatment with immune checkpoint inhibitors (anti PD-1 monoclonal antibody/anti PD-L1 monoclonal antibody, etc.). Those who have used no more than one immune checkpoint inhibitor (limited to CTLA-4/PD-1/PD-L1 monoclonal antibody, not including bispecific antibody, not including Penpulimab injection) in the stage of locally advanced radical treatment can be included if they meet the following criteria: 1. If used in the induction phase (with or without other drugs), the best effect in the induction phase is at least PR; 2. If used during radical radiochemotherapy/radiotherapy or subsequent maintenance stage, there is no progress during treatment and within one year after stopping treatment * At least one measurable lesion confirmed according to RECIST 1.1 criteria; * The function of main organs are well and meet the following standards: 1. Routine Blood routine examination standards (without blood transfusion or correction with hematopoietic stimulating factor drugs within 14 days before the examination): 1. Hemoglobin (HGB) ≥90 g/L; 2. Absolute value of neutrophil (NEUT) ≥1.5×109/L; 3. Platelets count (PLT) ≥ 100×109/L. 2. The biochemical examination shall meet the following standards: 1. Total bilirubin (TBIL) ≤ 1.5 times the upper limit of normal (ULN) (Patients with Gilbert syndrome ≤ 3 × ULN); 2. Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤ 2.5 × ULN. If it is accompanied by liver metastasis, ALT and AST ≤ 5 × ULN; 3. Serum creatinine (CR) ≤ 1.5 × ULN or Creatinine clearance (CCR) ≥ 60 ml/min; 3. Blood coagulation function or thyroid function test should meet the following standards: Prothrombin time (PT), activated partial thromboplastin time (APTT), international normalized ratio (INR)≤1.5×ULN (no anticoagulant therapy); 4. Thyroid Stimulating Hormone (TSH) ≤ ULN; if abnormal, T3 and T4 levels should be examined. If T3 and T4 levels are normal, it can be selected. 5. Heart color Doppler ultrasound assessment: Left ventricular ejection fraction (LVEF) ≥50%. * Female subjects of reproductive age should agree that they must conduct contraceptive measures (such as intrauterine devices, contraceptives, or condoms) during and for 6 months after the study; Female subjects should have a negative serum/urine pregnancy test within 7 days prior to study enrollment and must be non-lactating; Male subjects should agree that they must conduct contraception during the study period and for 6 months after the study. Exclusion Criteria: * Combined diseases and medical history: 1. Other malignant tumors have occurred or are currently suffering from other malignant tumors within 5 years before the first medication, except for fully treated non-melanoma skin cancer, cervical carcinoma in situ and papillary thyroid carcinoma; 2. Unresolved toxicities greater than CTC AE grade 1 due to any prior therapy, excluding alopecia, neurotoxic sequelae associated with prior platinum therapy; 3. Received major surgical treatment, obvious traumatic injury (excluding needle biopsy, endoscopic biopsy, etc.) within 28 days before the first drug; 4. Arterial/venous thrombotic events, such as cerebrovascular accident (including transient ischemic attack, cerebral hemorrhage, cerebral infarction), deep vein thrombosis and pulmonary embolism, occurred within 6 months before the first drug; 5. Active pulmonary tuberculosis, history of idiopathic pulmonary fibrosis, organizing pneumonia, drug-induced pneumonia, radiation pneumonitis requiring treatment, or active pneumonia with clinical symptoms; * Cancer-related symptoms and treatment: 1. Received NMPA-approved Chinese patent medicines with anti-tumor indications in the drug insert within 2 weeks prior to the first administration; 2. Received surgery, chemotherapy, radiotherapy or other anti-cancer therapy within 3 weeks before the start of study treatment (the washout period is calculated from the end of the last treatment); those who have received local radiotherapy in the past can be enrolled if they meet the following conditions: radiotherapy The end of the study treatment is more than 3 weeks (more than 2 weeks for brain radiotherapy); and the target lesions selected in this study are not in the radiotherapy area; Or the target lesion is located in the radiotherapy area, but the progress has been confirmed. 3. Previous treatment with anti-TIM-3 antibodies; 4. The nasopharyngeal lesions recurred after radiotherapy and received Re-radiotherapy; 5. maging (CT or MRI) shows that the tumor has invaded around important blood vessels, and it is judged by the investigator that the tumor is very likely to invade important blood vessels and cause fatal hemorrhage during the follow-up study; 6. Uncontrolled pleural effusion, pericardial effusion or ascites requiring repeated drainage; 7. Known uncontrolled or symptomatic active central nervous system (CNS) metastases presenting with clinical symptoms, cerebral edema, spinal cord compression, cancerous meningitis, leptomeningeal disease, and/or progressive growth. Patients with a history of CNS metastases or spinal cord compression were eligible if they were clearly treated and clinically stable after 4 weeks of discontinuation of anticonvulsants, steroids, or dehydrating agents prior to the first dose of the study.