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以IL-6为驱动的自身隐性乳酸盐促进了乌维黑色素瘤的免疫逃生

Chaoju Gong¹, Meiling Yang¹, Huirong Long^1,2

¹Xuzhou Key Laboratory of Ophthalmology, The Affiliated Xuzhou Municipal Hospital of Xuzhou Medical University, Xuzhou First People's Hospital, Eye Institute of Xuzhou, Xuzhou, China.

Investigative ophthalmology & visual science

|March 29, 2024

概括

介素-6 (IL-6) 通过重编程细胞代谢,促进皮膜黑色素瘤 (UM) 免疫逃生. 这种新陈代谢转变,特别是糖解的增加,稳定了PD-L1和HLA-E等免疫抑制蛋白质,阻碍了抗瘤免疫力.

科学领域:

在瘤学瘤学.
免疫学免疫学免疫学
代谢途径代谢途径

背景情况:

由免疫逃逸驱动的Uveal黑色素瘤 (UM) 转移是癌症死亡的主要原因.
在UM中免疫逃逸的分子机制尚未完全理解,这限制了有效的免疫疗法.
了解UM免疫规避对于开发向癌症疗法至关重要.

研究的目的:

为了阐明免疫逃脱在皮膜黑色素瘤 (UM) 的分子机制.
研究炎症和代谢重编程在UM免疫逃避中的作用.
为了确定转移性UM的潜在治疗点.

主要方法:

RNA测序 (RNA-seq) 用于转录基因组分析.
细胞杀死试验 (TALL-104,NK-92MI) 用于评估免疫抵抗.
对糖解速率进行细胞外酸化分析.
临床样本的蛋白质稳定性和免疫光度的CHX-chase测定.

主要成果:

干白素-6 (IL-6) 暴露增加了UM细胞中的PD-L1和HLA-E的调节,促进了免疫逃逸.
IL-6诱导糖解酶 (PFKP,PKM) 的上调和乙-CoA合成酶的下调.
抑制糖解和乳酸生产降低了PD-L1和HLA-E蛋白水平.
乳酸盐通过GPR81-cAMP-PKA通路稳定了PD-L1和HLA-E. 通过GPR81-cAMP-PKA通路稳定了PD-L1和HLA-E.

结论:

通过由IL-6诱导的代谢重编程,UM细胞获得了免疫逃生表型.
炎症和代谢重编程与UM中的免疫逃脱密切相关.
准代谢途径可能提供一种新的策略来克服UM免疫逃避.

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