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淋巴细胞激活基因3表达,γδT细胞/主要基因相容性复杂I类相互作用,以及默克尔细胞癌的预后

Jonathan Lai¹, Vrinda Madan¹, Aasheen Qadri¹

¹Department of Dermatology, Johns Hopkins University, Baltimore, Maryland; Department of Pathology, Johns Hopkins University, Baltimore, Maryland.

Laboratory investigation; a journal of technical methods and pathology

|November 7, 2024

概括

淋巴细胞激活基因3 (LAG-3) 和马-三角形T细胞是默克尔细胞癌 (MCC) 的预后. 高密度的LAG-3,马-三角形T细胞,CD8和CD3与改善了MCC患者的无进展生存率相关.

科学领域:

在瘤学瘤学.
免疫学免疫学免疫学
皮肤病学皮肤病学

背景情况:

默克尔细胞癌 (MCC) 是一种具有不良预后的侵袭性皮肤癌.
在MCC中,免疫逃避通常涉及主要组织相容性复合物I类 (MHC-I) 的下调.
虽然抗PD-1/PD-L1疗法是标准的护理,但许多患者没有反应或产生耐药性.

研究的目的:

在MCC瘤微环境中识别新的免疫检查点和生物标志物.
研究淋巴细胞激活基因3 (LAG-3) 和马-三角形 (γδ) T细胞在MCC中的作用.
评估各种免疫标记在免疫治疗前MCC病例中的预后意义.

主要方法:

免疫组织化学被用来表征PD-L1,PD-1,CD3,CD8,LAG-3,MHC-I和γδ T细胞的表达.
在54例免疫治疗前MCC病例中,使用HALO软件量化表达水平和标记密度.
进行了统计分析,包括斯皮尔曼相关性和条件树分析.

主要成果:

增加LAG-3和γδT细胞的密度与炎症瘤微环境的其他标志物相关.
较低的MHC-I密度显示,gδT细胞与CD3+T细胞的比率更高的趋势.
CD3,LAG-3,γδ T细胞和CD8细胞的高密度与改善无进展生存率有关.

结论:

LAG-3以MCC表达,具有预后性,表明其作为治疗点的潜力.
CD8和γδ T细胞在对MCC的反应中起着关键作用.
γδ T细胞密度可以作为MCC的新预后生物标志物.

关键词:

现场行动组-3 梅克尔细胞癌瘤是什么?抗原呈现的呈现方式.主要的组织相容性复合物I类.瘤免疫的微环境 γδ T 细胞的 T 细胞

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