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异构性损失会影响CDK12突变前列腺癌中免疫微环境上的MHC表达

William Lautert-Dutra¹, Camila M Melo¹, Luiz P Chaves¹

¹Department of Genetics, Medical School of Ribeirao Preto, University of Sao Paulo - USP, Ribeirão Prêto, SP, 14048-900, Brazil.

Molecular cytogenetics

|May 4, 2024

概括

前列腺癌中的CDK12突变可能通过改变MHC表达而影响免疫治疗反应. 了解这些变化,包括失去了异性,可以改善治疗预测,并指导新的治疗策略.

科学领域:

在瘤学瘤学.
免疫基因组学是什么
分子生物学分子生物学

背景情况:

前列腺癌 (PCa) 免疫治疗反应与MSI,高TMB和PD-L1.1等生物标志物有关.
CDK12突变正在成为PCa免疫治疗反应的潜在预测因子.
将CDK12突变与免疫逃避联系在一起的机制,可能是通过减少MHC表达,需要澄清.

研究的目的:

研究前列腺癌中CDK12突变与MHC基因表达之间的关联.
探索MHC表达变异对下游免疫路径和瘤微环境 (TME) 现型的影响.
为了确定CDK12的改变,MHC表达和LOH状态是否可以预测PCa的结果.

主要方法:

来自公共领域CDK12突变PCa样本 (n=58) 和回顾性队列 (n=53) 的基因组和基因表达数据的分析.
根据基因表达四分位数,将瘤分为"高"和"低"MHC表达群.
数字细胞测量分析以评估免疫细胞透和对影响HLA基因的染色体6异构性损失 (LOH) 的评估.

主要成果:

具有高MHC表达的CDK12突变瘤显示TME特征炎症,PD-L1,IDO1,TIM3增加,以及免疫细胞透 (CD8+ T细胞,B细胞,γδ T细胞,M1巨细胞).
具有低MHC表达的CDK12突变瘤表现出免疫冷TME表型和免疫编辑,与染色体6LOH相关,影响HLA.
一个回顾性分析证实了CDK12突变的流行率 (4%) 和MHC的低表达在初级PCa的子集.

结论:

结合MHC表达水平和LOH状态的CDK12变化,可以提高特定PCa亚组的结果预测.
研究结果表明,应该探索治疗策略,以提高CDK12缺陷PCa中MHC表达的调节,以提高免疫治疗的疗效.

关键词:

适应性免疫系统适应性免疫系统抗原呈现方式生物标志物生物标志物复制编号协会协会数字细胞测量是指数字细胞测量.免疫逃逸是一种免疫逃避.免疫治疗是一种免疫疗法.公共领域数据库是公共领域的数据库.人体染色体变化染色体变化文字转录学 (Transcriptomics) 是一个学科.

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