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微波除与PD-L1阻断相结合,协同促进Cxcl9-介导的抗瘤免疫力

Ningning He^1,2,3, Hao Huang^2,3, Shaoxian Wu^2,3

¹College of Medicine, Yangzhou University, Yangzhou, China.

|April 24, 2024

概括

微波除与抗PD-L1疗法相结合,有效地减少小鼠结直肠癌肝脏转移的增长. 这种组合通过增强IFN-γ-CXCL9轴来增强CD8+T细胞功能,提供了一个有前途的癌症治疗策略.

科学领域:

免疫学免疫学免疫学
在瘤学瘤学.
癌症治疗癌症治疗

背景情况:

结肠直肠癌肝转移 (CCLM) 复发仍然是一个临床挑战,尽管微波切除 (MWA).
编程细胞死亡1联体1 (PD-L1) 升调后MWA表明免疫疗法组合的潜力.
以前的研究表明,MWA可能会在瘤微环境中产生增强的免疫反应.

研究的目的:

在临床前的CCLM模型中研究结合MWA与抗PD-L1治疗的疗效.
阐明这种联合治疗对免疫细胞功能和瘤进展的潜在机制.
确定潜在的生物标志物和治疗目标,以提高CCLM中MWA的疗效.

主要方法:

使用MWA治疗的CCLM临床前小鼠模型.
使用MWA与抗PD-L1 (αPD-L1) 的联合治疗.
进行流细胞计和单细胞RNA测序以分析免疫细胞群和功能.
研究了干扰素- (IFN-γ),化学激素 (CXCL9) 和瘤相关巨细胞 (TAM) 的作用.

主要成果:

MWA加上αPD-L1治疗显著降低了瘤生长和延长整体存活时间 (OS).
组合疗法抑制了CD8+T细胞的耗尽,并增强了它们的效应器功能.
观察到转录因子Irf8的表达增加,促进了TAM极化和CXCL9的产生.
CXCL9对CD8+T细胞和Th1细胞化学反应至关重要;其阻断或淘汰促进了瘤生长.

结论:

将MWA与抗PD-L1疗法结合起来是一个有前途的策略,可以使CCLM的抗瘤免疫反应复苏.
IFN-γ-CXCL9-CD8+ T细胞轴和IRF8调节的TAM在这种组合治疗的有效性中起着至关重要的作用.
这种方法需要进一步的临床研究来治疗CCLM和潜在的其他癌症.

关键词:

在Cxcl9 在 IRF8 中,我们可以使用 IRF8.在PD-L1中.免疫疗法免疫疗法微波除是微波除的一种方法.

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