Background The preclinical experiments and several clinical studies showed icotinib,an oral epidermal growth factor receptor （EGFR） tyrosine kinase inhibitor,in Chinese patients with advanced non-small cell lung can...Background The preclinical experiments and several clinical studies showed icotinib,an oral epidermal growth factor receptor （EGFR） tyrosine kinase inhibitor,in Chinese patients with advanced non-small cell lung cancer （NSCLC） who failed previous chemotherapy.We performed a retrospective study of the efficacy and safety of icotinib monotherapy in a different and more recent sample of Chinese patients.Methods The clinical data of 149 patients with advanced NSCLC who were admitted to Zhejiang Cancer Hospital from August 1,2011 to July 31,2012 were retrospectively analyzed.All patients were given icotinib treatment after the failure of previous chemotherapy.Univariate and multivariate analyses were conducted based on the Kaplan Meier method and Cox proportional hazards model.Results The objective response rate was 33/149 and disease control rate was 105/149.No complete response occurred.Median progression free survival （PFS） with icotinib treatment was 5.03 months （95％ CI：3.51 to 6.55）.Median overall survival was 12.3 months （95％ CI：10.68 to 13.92）.Multivariate analysis showed that the mutation of EGFR and one regimen of prior chemotherapy were significantly associated with longer PFS.At least one drug related adverse event was observed in 65.8％ （98/149） of patients,but mostly grade 1 or 2 and reversible and none grade 4 toxicity.Conclusions lcotinib monotherapy is an effective and well tolerated regimen for Chinese patients with NSCLC after the failure of chemotherapy.It is a promising agent and further study with icotinib in properly conducted trials with larger patient samples and other ethnic groups is warranted.展开更多
目的探讨程序性死亡受体1单克隆抗体(PD-1单抗)加重allo-HSCT小鼠炎性损伤和慢性移植物抗宿主病(chronic graft versus host disease,cGVHD)的作用机制。方法将DBA/2小鼠的骨髓和脾细胞注射到白消安联合氟达拉滨化疗方案预处理BALB/C小...目的探讨程序性死亡受体1单克隆抗体(PD-1单抗)加重allo-HSCT小鼠炎性损伤和慢性移植物抗宿主病(chronic graft versus host disease,cGVHD)的作用机制。方法将DBA/2小鼠的骨髓和脾细胞注射到白消安联合氟达拉滨化疗方案预处理BALB/C小鼠构建cGVHD模型(n=48),将BALB/c(H-2Kd)小鼠按随机数字法分为炎性组(n=8)和对照组[注射磷酸盐缓冲液(PBS),n=8],使用酵母多糖诱导炎性组小鼠为炎症状态。观察记录两组小鼠移植后体重变化、生存情况以及cGVHD的表现,另取两组小鼠提取受累靶器官(皮肤、肝脏、小肠、结肠、肺脏)组织进行病理评分(每组n=4);体外实验取8~12周的BALB/C小鼠按上述方法建立炎症cGVHD模型,同样按照随机数字法分成PD-1组(注射PD-1单克隆抗体)和对照组(每组n=12),观察记录两组小鼠移植后体重变化、生存情况以及cGVHD的表现,另取小鼠应用流式细胞技术检测靶器官的细胞亚群、表面的共刺激分子等(n=4)。结果炎性组呈现更显著的cGVHD改变,小鼠死亡率高,体重下降快,GVHD的症状更严重。炎性组小鼠肝脏和肺脏的替代活化的巨噬细胞(M2)比例明显低于对照组(P<0.05),经典活化的巨噬细胞(M1)无差别。在体外实验中,炎性组相较对照组脾细胞M1比例均增多,M2比例明显均减少。分泌的白细胞介素(IL)-4,IL-10减少,共刺激分子CD80和CD86增多。结论PD-1单抗可加重allo-HSCT小鼠的炎性损伤和cGVHD,其作用机制可能与调节性T细胞(regulatory cell,Treg)减少相关。展开更多
基金This study was supported by grants from the Zhejiang Provincial Natural Science Foundation of China （No. LY13H160024） and Development Center for Medical Science and Technology, Ministry of Health of China （No.W2012FZ 134）.
文摘Background The preclinical experiments and several clinical studies showed icotinib,an oral epidermal growth factor receptor （EGFR） tyrosine kinase inhibitor,in Chinese patients with advanced non-small cell lung cancer （NSCLC） who failed previous chemotherapy.We performed a retrospective study of the efficacy and safety of icotinib monotherapy in a different and more recent sample of Chinese patients.Methods The clinical data of 149 patients with advanced NSCLC who were admitted to Zhejiang Cancer Hospital from August 1,2011 to July 31,2012 were retrospectively analyzed.All patients were given icotinib treatment after the failure of previous chemotherapy.Univariate and multivariate analyses were conducted based on the Kaplan Meier method and Cox proportional hazards model.Results The objective response rate was 33/149 and disease control rate was 105/149.No complete response occurred.Median progression free survival （PFS） with icotinib treatment was 5.03 months （95％ CI：3.51 to 6.55）.Median overall survival was 12.3 months （95％ CI：10.68 to 13.92）.Multivariate analysis showed that the mutation of EGFR and one regimen of prior chemotherapy were significantly associated with longer PFS.At least one drug related adverse event was observed in 65.8％ （98/149） of patients,but mostly grade 1 or 2 and reversible and none grade 4 toxicity.Conclusions lcotinib monotherapy is an effective and well tolerated regimen for Chinese patients with NSCLC after the failure of chemotherapy.It is a promising agent and further study with icotinib in properly conducted trials with larger patient samples and other ethnic groups is warranted.
