文献阅读放射治疗

03 放疗青咖汇——小细胞肺癌放疗与免疫治疗总结

2020-03-15  本文已影响0人  whykm

文献总览

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ES-SCLC一线免疫治疗

durvalumab plus platinum-etoposide versus platinum-etoposide in first-line treatment of extensive-stage small-cell lung cancer(CASPIAN):a randomised,controlled,open-label,phase 3 trial
a study of pembrolizumab in combination with etoposide/platinum(Cisplatin or Carboplatin) for participants with extensive stage small cell lung cancer(KEYNOTE-604)
subgroup analysis of japanese patients in a phase III study of atezolizumab in extensive-stage small-cell lung cancer(IMpower133)
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ES-SCLC≥2线免疫治疗

ES-SCLC维持免疫治疗

文献:nivo plus Ipi,Nivo, or placebo as maintenance therapy in patients with extensive disease small cell lung cancer after first-line platinum-based chemotherapy:results from the double-blind,randomized phase III checkmate 451 study
+ 随访9个月,两组患者极限特征均衡
    + Nivo+Ipi与安慰剂相比未明显改善OS
    + Nivo与安慰剂相比也未改善OS
    + Nivo+Ipi vs安慰剂PFS风险比为0.72
    + Nivo vs 安慰剂PFS风险比为0.67
durvalumab in combination with olaparib in patients with relapsed SCLC:Results from a phase II study
+ 研究背景
    + 尽管存在很高的肿瘤突变负荷,但ICI在SCLC中的疗效有限
    + 我们假设PARP抑制剂可以增加ICI在SSCLC治疗中的疗效

+ 研究设计
    + 复发性SCLC的患者,Durvalumab 1500mg q4w+Olaparib 300mg bid
    + 通过分析治疗前和治疗中活检样本中CD8+T细胞水平来定义SCLC免疫表型:
        + desert (CD8+ T-cell prevalence low)
        + excluded(CD8+ T-cells in stroma immediately adjacent/within tumor)
        + inflamed(CD8+ T cells in direct contact with tumor)
    + 主要终点 ORR
+ 研究结果
    + 标本显示为炎症表型的肿瘤中均观察到肿瘤反应
    + 基线时没有炎症表型的5个肿瘤中,治疗期间未观察到TIL中T细胞浸润或PD-L1表达增加

SCLC分子分型

文献:molecular subtypes of small cell lung cancer:a synthesis of human and mouse model data
+ 根据SCLC发生发展的4个关键转录因子表达差异进行分型
    + SCLC-A  ASCL1
    + SCLC-N  NEUROD1
    + SCLC-P   POU2F3
    + SCLC-Y    YAP1

SCLC肿瘤免疫微环境

文献:the prognosstic role of circulating CD8+ T cell proliferation in patients with untreated extensive stage small cell lung cancer
+ SCLC患者外周血免疫力受损,外周CD8+T细胞的增殖潜力是PFS的重要预测因子
文献:immun cell infiltration may be a key determinant of long-term survival in small cell lung cancer
+ 研究结果
    + 绝大多数差异表达基因与免疫微环境内的免疫反应有关,而不是与肿瘤细胞有关
    + 大多数差异表达(93%)在LTS的患者中过表达
    + LTS患者免疫相关转录显著过表达
    + LTS患者CD3+、CD8+、和CD4+T细胞和表达PD-1的淋巴细胞的水平显著升高(p<0.01)
    + 尽管LTS患者的某些肿瘤区域也具有较高数量的抑制性免疫性细胞(单核细胞、调节性淋巴细胞和巨噬细胞),但这些细胞相对于CD3+T淋巴细胞的计数通常较低
+ 研究结论
    + SCLC患者的长期生存与肿瘤微环境中免疫细胞浸润有关
    + 机体的抗肿瘤免疫反应的表征可能为SCLC的个体化免疫治疗提供指导
文献:DNA damage response and repair pathway alteration and its association with tumor mutation burden and platinum-based chemotherapy in SCLC
文献:expression and clinical significance of PD-L1,B7-H3,B7-H4 and TILs in human small cell lung cancer(SCLC)
文献: surgical resection of SCLC: prognostic factors and the tumor microenvironment
文献: comparison of the prognostic value of systemic inflammation response markers in small cell lung canceer patients
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