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一种异质的瘤免疫微环境,不常见的表皮生长因子受体突变非小细胞肺癌

Chong Zhang^1,2, Liangwei Yang², Weidi Zhao²

¹Health Science Center, Ningbo University, Ningbo, China.

|June 19, 2024

概括

非小细胞肺癌 (NSCLC) 中不常见的表皮生长因子受体 (EGFR) 突变显示出明显的瘤免疫微环境 (TME) 特征,包括更多的T细胞和改变的通路,表明潜在的免疫疗法差异.

科学领域:

在瘤学瘤学.
免疫学免疫学免疫学
遗传学是一个遗传学.

背景情况:

在非小细胞肺癌 (NSCLC) 中常见的表皮生长因子受体 (EGFR) 突变通常对免疫治疗无反应.
不常见的EGFR突变的免疫治疗潜力在很大程度上仍未被探索.

研究的目的:

为了研究与NSCLC中不常见的EGFR突变相关的瘤免疫微环境 (TME) 特性.
为了比较不常见的EGFR突变NSCLC与常见的EGFR突变NSCLC的TME.

主要方法:

多机构研究包括41名EGFR突变患者 (22例常见,19例不常见),主要是I期患者.
多重复合免疫光 (mIF) 分析分析TME特征.
在不常见的EGFR突变中识别不同的TME子类的无监督聚类.
在癌症基因组图谱 (TCGA) 肺腺癌队列中的验证.

主要成果:

与常见突变相比,不常见的EGFR突变显示T细胞透率增加和M2巨细胞存在率降低.
在不常见的EGFR突变瘤中观察到高调抗原处理和呈现途径.
在不常见的EGFR突变中发现了两种不同的TME群:一种缺乏细胞毒性T细胞,另一种"更热"具有下调的低氧,氧化酸化和TGF-β信号,以及上调的CTLA4和PDCD1.
在TCGA队列中验证了CTLA4和PDCD1与TME概况的关联.

结论:

不常见的EGFR突变与NSCLC中独特的TME特征相关,与常见突变显著不同.
在不常见的EGFR突变NSCLC的TME中存在异质性,这可能对免疫疗法反应产生潜在影响.
根据这些TME发现,对针对不常见EGFR突变的免疫治疗策略的进一步研究是有必要的.

关键词:

在NSCLCLC中,我们可以看到.异质性的异质性瘤免疫的微环境不常见的EGFR突变体

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