Si Sun1,2, Chang Liu1,2, Chunyan Duan3, Songxia Yu4, Qiao Zhang4, Nana Xu4, Bo Yu1,2, Xianghua Wu1,2, Jialei Wang5,6, Xingjiang Hu7, Hui Yu8,9. 1. Department of Thoracic Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China. 2. Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. 3. The First Department of Oncology, Affiliated Traditional Chinese Medicine Hospital, Xinjiang Medical University, Urumqi, 830000, China. 4. Zhejiang Provincial Key Laboratory for Drug Evaluation and Clinical Research, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China. 5. Department of Thoracic Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China. luwangjialei@126.com. 6. Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. luwangjialei@126.com. 7. Zhejiang Provincial Key Laboratory for Drug Evaluation and Clinical Research, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China. huxingjiang@zju.edu.cn. 8. Department of Thoracic Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China. yhui30@hotmail.com. 9. Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. yhui30@hotmail.com.
Abstract
OBJECTIVE: Immune checkpoint inhibitors (ICIs) have been validated in epidermal growth factor receptor (EGFR) wild-type advanced non-small cell lung cancer (NSCLC) patients. However, there exists no evidence regarding NSCLC patients harboring EGFR mutations, experiencing EGFR-TKI (tyrosine kinase inhibitor) treatment failure. We collected clinical information from real world and conducted a time series-based meta-analysis to determine the efficacy and safety of ICIs in patients harboring EGFR mutations and experienced EGFR-TKIs resistance. METHODS: Twenty-two NSCLC patients with EGFR mutations after TKI resistance were included from two hospitals. PubMed, Embase and Cochrane Library were searched for relevant literature published until December 31, 2021. Endpoint outcomes included mortality and progression-free survival (PFS) at different times of follow-up. RESULTS: In total, 22 patients showed that the median PFS was 5.6 months (range 2.0-9.0 months). According to treatment strategies, the median PFS was 2.4 months (range 2.0-5.3 months) in the ICI monotherapy group and 5.9 months (range 2.8-9.0 months) in the ICI combined Chemotherapy group. Additionally, sixteen studies, including 5 trials, 10 controlled cohorts and 1 real-world study, were assessed, involving a total of ICI-treated NSCLC patients with EGFR mutation after TKI failure. The 6-month survival and PFS rate were 0.82 (95% CI 0.36-0.97) and 0.55 (95% CI 0.34-0.74), respectively. ICI combined chemotherapy showed the best survival outcome among these groups, as demonstrated by the 12-month survival rate and PFS. No new safety signals were identified with the combination therapy. The frequency of treatment-related adverse events was similar to that in previously reported studies of chemotherapy combined with checkpoint inhibitors. CONCLUSIONS: The addition of ICIs plus chemotherapy may significantly improve progression-free survival among patients with locally advanced or metastatic non-squamous NSCLC who EGFR-TKIs resistance.
OBJECTIVE: Immune checkpoint inhibitors (ICIs) have been validated in epidermal growth factor receptor (EGFR) wild-type advanced non-small cell lung cancer (NSCLC) patients. However, there exists no evidence regarding NSCLC patients harboring EGFR mutations, experiencing EGFR-TKI (tyrosine kinase inhibitor) treatment failure. We collected clinical information from real world and conducted a time series-based meta-analysis to determine the efficacy and safety of ICIs in patients harboring EGFR mutations and experienced EGFR-TKIs resistance. METHODS: Twenty-two NSCLC patients with EGFR mutations after TKI resistance were included from two hospitals. PubMed, Embase and Cochrane Library were searched for relevant literature published until December 31, 2021. Endpoint outcomes included mortality and progression-free survival (PFS) at different times of follow-up. RESULTS: In total, 22 patients showed that the median PFS was 5.6 months (range 2.0-9.0 months). According to treatment strategies, the median PFS was 2.4 months (range 2.0-5.3 months) in the ICI monotherapy group and 5.9 months (range 2.8-9.0 months) in the ICI combined Chemotherapy group. Additionally, sixteen studies, including 5 trials, 10 controlled cohorts and 1 real-world study, were assessed, involving a total of ICI-treated NSCLC patients with EGFR mutation after TKI failure. The 6-month survival and PFS rate were 0.82 (95% CI 0.36-0.97) and 0.55 (95% CI 0.34-0.74), respectively. ICI combined chemotherapy showed the best survival outcome among these groups, as demonstrated by the 12-month survival rate and PFS. No new safety signals were identified with the combination therapy. The frequency of treatment-related adverse events was similar to that in previously reported studies of chemotherapy combined with checkpoint inhibitors. CONCLUSIONS: The addition of ICIs plus chemotherapy may significantly improve progression-free survival among patients with locally advanced or metastatic non-squamous NSCLC who EGFR-TKIs resistance.