归因于复杂的瘤免疫微环境的DNA甲基化异质性促使质瘤的预后风险增加
Shuangyue Ma1,2, Xu Pan1, Jing Gan1
1College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China.
Epigenetics
|March 5, 2024
概括
质瘤中的DNA甲基化异质性与瘤免疫微环境有关. 更高的异质性与更好的患者存活率和更慢的进展相关,为质瘤生物学提供了新的见解.
科学领域:
- 神经瘤学神经瘤学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 癌症免疫学 癌症免疫学
背景情况:
- 质瘤,包括质母细胞瘤 (GBM) 和低级质瘤 (LGG),是神经系统的恶性瘤,具有不同的世卫组织分类.
- 瘤免疫微环境显著影响癌症的进展和治疗反应.
- 了解质瘤中的DNA甲基化异质性对于剖析其与免疫微环境的关系至关重要.
研究的目的:
- 研究质瘤中DNA甲基化异质性如何受到瘤免疫微环境的影响.
- 开发用于量化DNA甲基化异质性及其与免疫细胞透和患者结果相关的指标.
- 确定特定的DNA甲基化位点,并构建一个风险评分来预测质瘤特征和预后.
主要方法:
- 净化的人类免疫细胞和大量质瘤组织之间的DNA甲基化概况的比较.
- 基于瘤免疫微环境亚型的GBM和LGG样本的分层分层使用癌症基因组图谱 (TCGA) 数据.
- 开发和应用中介甲基化位点比例 (PIM) 评分,以评估DNA甲基化异质性.
- 创建细胞类型相关的DNA甲基化异质性贡献 (CMHC) 评分来评估免疫细胞的影响.
- 鉴定与预后相关的CpG位点,以构建细胞类型相关的DNA甲基化异质性风险 (CMHR) 评分.
主要成果:
- 中间甲基化位点在质瘤组织中得到丰富,较高的PIM得分表明更强的DNA甲基化异质性.
- 增强的DNA甲基化异质性与增加的免疫细胞透,改善的生存率和较慢的瘤进展有关.
- 该CMHR得分显示了与细胞毒性T淋巴细胞透的正相关性,并显示了IDH状态 (AUC=0.96) 和质瘤组织学表型 (AUC=0.81) 的强有力的预测性能.
- 八个特定的CpG位点的变化可能与质瘤药物治疗有关.
结论:
- DNA甲基化异质性与质瘤中瘤免疫微环境的复杂性密切相关.
- 该研究提供了新的指标 (PIM,CMHC,CMHR) 来评估DNA甲基化异质性及其临床影响.
- 研究结果表明,DNA甲基化模式可以作为结质瘤预后,IDH状态的生物标志物,并可能指导治疗策略.
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