Objective: To explore the safety and therapeutic effect of programmed death 1 (PD-1) antibody combined with chemotherapy as a neoadjuvant therapy for patients with stage Ⅱ to Ⅲ non-small cell lung cancer (NSCLC). Methods: Thirteen patients, who had been diagnosed as stage Ⅱ-Ⅲ NSCLC and received PD-1 inhibitor plus chemotherapy as a neoadjuvant treatment in National Cancer Center/Cancer Hospital were recruited. The patients received consecutive neoadjuvant chemotherapy for 21 days as a cycle and the therapeutic efficacy was evaluated after two cycles. Results: At the last time of follow-up on December 2, 2019, the objective response rate (ORR) and disease control rate (DCR) of these patients were 61.5% (95% CI 30.9%-92.1%) and 100%, respectively. The downregulation rate of disease stage was 61.5% (8/13). The resectable rate was 38.5% (5/13), among them, the major pathologic response (MPR) was 60.0% (3/5) and the complete pathologic response (CPR) was 20.0% (1/5). The neoadjuvant chemotherapy displayed a low incidence of adverse reaction. The main grade 3 to 4 toxicities were neutropenia (38.5%) and leukopenia (23.1%). There was no significant immune-related toxicity. The safety and tolerability of perioperative period of patients underwent resection were promising. Conclusions: Immunotherapy combined with chemotherapy as a neoadjuvant treatment is an effective, low-toxicity treatment manner, which has perioperative safety and high rate of MPR for patients with resectable NSCLC. It is a promising treatment option for patients with stage Ⅱ to Ⅲ NSCLC.
目的： 探讨程序性细胞死亡蛋白1(PD-1)单抗联合化疗在Ⅱ～Ⅲ期非小细胞肺癌(NSCLC)术前新辅助治疗中的疗效和安全性。 方法： 分析中国医学科学院肿瘤医院内科13例Ⅱ～Ⅲ期NSCLC患者接受PD-1单抗联合化疗作为新辅助治疗的疗效和安全性，治疗方案为每21 d为1个治疗周期，2个周期后评价患者的疗效和安全性。 结果： 截至2019年12月2日，全组患者影像学评价客观有效率(ORR)和疾病控制率(DCR)分别为61.5%和100%。治疗后分期下降率为61.5%(8/13)。手术切除率为38.5%(5/13)，显著病理缓解(MPR)率为60.0%(3/5)，完全病理缓解率为20.0%(1/5)。治疗相关的不良反应发生率低，主要的3～4级不良反应为中性粒细胞减少(38.5%)和白细胞减少(23.1%)，未见明显免疫相关不良反应。接受手术的患者围手术期的安全性和耐受性良好。 结论： 对于Ⅱ～Ⅲ期NSCLC患者，免疫治疗联合化疗作为新辅助治疗具有疗效好、不良反应发生率低、围手术期安全性好、MPR率高等特点。免疫治疗联合化疗是Ⅱ～Ⅲ期NSCLC值得进一步探索的新辅助治疗方案。.
Keywords: Immune checkpoint inhibitor therapy; Neoadjuvant chemotherapy; Neoplasms, non-small cell lung.