感冒瘤的保存子集对免疫检查点封锁有反应
Jade Moore1,2, Jim Gkantalis1, Ines Guix1
1Department of Radiation Oncology, University of California, San Francisco, San Francisco, CA, USA.
bioRxiv : the preprint server for biology
|March 18, 2024
概括
这项研究确定了一种生物标志物 (βAlt),该生物标志物可以预测感冒瘤对免疫检查点阻塞 (ICB) 的反应. 抑制TGFβ可以通过激活自然杀手细胞,将这些瘤转化为ICB反应的瘤.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 癌症研究 癌症研究
背景情况:
- 免疫检查点阻塞 (ICB) 的有效性依赖于恢复癌细胞的免疫识别.
- 淋巴细胞透瘤的患者对ICB反应最好,但许多患者的瘤免疫力较差.
- 识别患有免疫不良瘤的患者,他们可以从ICB中受益,这一点至关重要.
研究的目的:
- 为了评估βAlt的预测值,一个将TGFβ标和DNA修复基因相关联的得分,用于ICB反应.
- 评估与βAlt.相关的免疫背景.
- 调查治疗策略,以转换ICB抗性,免疫性较差的瘤.
主要方法:
- 来自IMvigor210,TCGA和TISMO数据集的转录组数据分析.
- 评估βAlt与免疫特征的关联.
- 用TGFβ抑制剂,辐射和/或ICB治疗的ICB耐药瘤的临床前建模.
主要成果:
- 高βAlt与免疫不良的瘤背景有关,但预测了人类和小鼠的ICB反应.
- 结合放射治疗的TGFβ抑制将免疫性差,ICB抗性瘤转化为免疫性丰富,ICB响应性瘤.
- 照射瘤中的TGFβ阻塞激活了自然杀手 (NK) 细胞,为ICB反应招募淋巴细胞.
结论:
- 失去TGFβ能力将冷瘤确定为ICB的候选者.
- 抑制TGFβ通过NK细胞将高βAlt感冒瘤转化为ICB响应的瘤.
- 综合生物标志物签名可以识别患有"冷"瘤的患者,可转化为"热"瘤,以获得治疗效益.
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