Therapeutic efficacy analysis of immunotherapy in small cell lung cancer
10.3760/cma.j.cn112152-20200324-00253
- VernacularTitle:小细胞肺癌免疫治疗疗效的影响因素分析
- Author:
Jia ZHONG
1
;
Qiwen ZHENG
;
Jun ZHAO
;
Ziping WANG
;
Meina WU
;
Minglei ZHUO
;
Yuyan WANG
;
Jianjie LI
;
Xue YANG
;
Hanxiao CHEN
;
Tongtong AN
Author Information
1. 北京大学肿瘤医院暨北京市肿瘤防治研究所 恶性肿瘤发病机制及转化研究教育部重点实验室 胸部肿瘤内一科 100142
- Keywords:
Neoplasms, small cell lung;
Immunotherapy;
Immune-checkpoint inhibitors;
Clinical characteristics
- From:
Chinese Journal of Oncology
2020;42(9):771-776
- CountryChina
- Language:Chinese
-
Abstract:
Objective:Recently, increasing number of lung cancer patients benefit from immune-checkpoint inhibitors (ICIs). However, the data of Chinese small cell lung cancer (SCLC) patients is limited. This study aims to analyze the response and survival data of ICIs treatment in SCLC and to explore the predictive biomarkers.Methods:Forty-seven SCLC patients who received ICIs treatment from Peking University Cancer Hospital from May 2017 to September 2019 was recruited. Clinical characteristics including sex, age, smoking status, ICIs strategy, PD-L1 expression and therapeutic efficacy were collected to explore the clinical predictive biomarkers for SCLC ICIs treatment.Results:Among the 47 patients, 18 (38.3%) cases were partial repose (PR), 11 (23.4%) were stable disease (SD), 18 (38.3%) were progressive disease (PD), and the objective response rate (ORR) was 38.3%, disease control rate (DCR) was 61.7%, the median progression-free survival (PFS) was 5.3 months. ICIs monotherapy accounts for 27.7%, the ORR was 15.4%, DCR was 53.8%, median PFS was 2.7 months. Combined therapy accounts for 72.3%, the ORR was 47.1%, DCR was 64.7%, median PFS was 5.4 months. Fourteen (29.8%) patients received ICIs as the first line treatment, their ORR was 85.7%, DCR was 100%, median PFS was 9.1 month. The ORR was not related to the age, sex, body mass index (BMI), smoking status and programmed death-ligand 1 (PD-L1) expression ( P>0.05). The ORRs were higher in patients underwent PD-L1 monotherapy ( P=0.001), combined therapy ( P=0.002) and received ICIs as the first line treatment ( P<0.001). Log-rank analysis indicated that the PFS of female patients were 12.0 months, significantly longer than 4.4 months of male patients in ICIs treatment ( P=0.038). Patients who received PD-L1 monotherapy, combined treatment, or ICIs as the first line treatment had longer PFS than their counterparts, though no statistical significant was observed ( P>0.05). Cox multivariate analysis showed that, the gender was not an independent predictor for PFS in ICIs treatment ( HR=3.777, 95% CI=0.974~30.891, P=0.054). Conclusions:Immunotherapy is an effective treatment strategy for SCLC. Patients who receive combined ICIs treatment, first line ICIs treatment and PD-L1 treatment may get greater benefits. PD-L1 expression cannot predict the response and PFS in SCLC ICIs treatment.
