SIGLEC-5/14 抑制CD11b/CD18整合素激活和中性粒细胞介导的瘤细胞细胞毒性
Panagiota Bouti1, Colin Blans1, Bart J A M Klein1
1Department of Molecular Hematology, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, 1066 CX Amsterdam, The Netherlands.
International journal of molecular sciences
|December 23, 2023
概括
瘤细胞可以通过与中性粒细胞受体SIGLEC-5/14接触酸,抑制抗瘤活性来逃避免疫攻击. 阻止这种相互作用增强了中性粒细胞介导的瘤细胞杀伤,提供了一个新的先天免疫检查点目标.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 分子医学是分子医学.
背景情况:
- 针对适应性免疫系统的检查点抑制剂,如抗CD47,增强抗瘤疗效.
- 中性粒细胞具有抑制性受体,包括超出SIRPα的酸结合性免疫球蛋白样学蛋白 (SIGLECs).
- 瘤细胞表达的酸可以与中性细胞SIGLEC相互作用,可能调节免疫反应.
研究的目的:
- 为了研究酸-SIGLEC-5/14相互作用在抑制中性粒细胞介导的抗瘤细胞毒性的作用.
- 为了确定阻断这种相互作用是否可以增强抗瘤免疫力.
主要方法:
- 评估了酸-SIGLEC-5/14相互作用对中性粒细胞-瘤细胞结合体形成和细胞形成的影响.
- 使用动态声力测量测量了中性粒细胞与瘤细胞的结合.
- 评估了阻断酸-SIGLEC-5/14相互作用对CD11b/CD18形状和瘤细胞杀伤的影响.
主要成果:
- 瘤酸和中性粒细胞SIGLEC-5/14之间的相互作用抑制了抗体依赖细胞细胞毒性 (ADCC).
- 这种相互作用限制了结合体形成和细胞形成,这对于中性粒细胞ADCC至关重要.
- 抑制酸-SIGLEC-5/14相互作用增强了中性粒细胞对CD11b/CD18调节的结合和瘤细胞的杀死.
结论:
- 酸-SIGLEC-5/14轴代表了瘤微环境中的新型抑制途径.
- 针对这种天生的免疫检查点提供了一种潜在的策略,以增强抗瘤疗法.
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