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CXCR1/2对抗性抑制中性粒细胞的功能,而不是在癌症中招募

Jeff W Kwak¹, Helena Q Nguyen¹, Alex Camai¹

¹Translational Science & Therapeutics Division, Fred Hutchinson Cancer Center, Seattle, USA.

|July 30, 2024

概括

在癌症治疗中阻断CXCR1/2阻碍了中性粒细胞免疫抑制,而不是招募. 这种方法可以增强抗瘤免疫力,而不会增加感染风险,提供了一种新的治疗策略.

科学领域:

免疫学免疫学免疫学
癌症生物学癌症生物学
药理学药理学是指药理学的学科.

背景情况:

表达CXCR1/2的中性粒细胞及其配体与癌症患者的不良结果有关,并预测免疫检查点抑制剂 (ICI) 治疗失败.
在临床前模型中,CXCR1/2对抗剂单独和与ICI治疗一起显示出有前途,导致正在进行的临床试验.

研究的目的:

阐明CXCR1/2抑制影响瘤免疫力和中性粒细胞功能的机制.
确定CXCR1/2阻断是否影响中性粒细胞的招募,功能和潜在的感染并发症.

主要方法:

在小鼠模型中研究了CXCR2对抗对瘤生长和中性粒细胞透的影响.
分析了中性粒细胞转录程序,免疫抑制功能和反应性氧物种/阿基纳-1释放的变化.
评估了CXCR1/2抑制对中性粒细胞化和杀死细菌的能力的影响.

主要成果:

抗性CXCR2抑制了瘤的生长速度,但没有阻止中性粒细胞透到瘤中.
抑制CXCR1/2重编程中性粒细胞,降低它们抑制淋巴细胞增殖的能力.
关键的抑制分子,如活性氧物种和阿基纳-1减少,而杀死细菌的能力保持不变.

结论:

抑制CXCR1/2通过改变中性粒细胞功能来增强抗瘤免疫力,而不是通过减少中性粒细胞数量.
这种机制解释了CXCR1/2对抗剂在癌症治疗中的有效性,而不会引起机会性感染.

关键词:

瘤微环境是一个微环境.肺癌是一种肺癌.中性粒细胞中性粒细胞.

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