在瘤中,SpliceMutr使得分离衍生的新抗原负荷的泛癌分析成为可能
Theron Palmer1,2, Michael D Kessler2,3, Xiaoshan M Shao1
1Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland.
Cancer research communications
|October 29, 2024
概括
异常的替代拼接会产生激发免疫反应的新抗原. 一个名为SpliceMutr的新工具识别了这些拼接衍生的新抗原,并揭示了它们与抗瘤免疫力和免疫治疗反应的联系.
科学领域:
- 免疫学 免疫学 免疫学
- 生物信息学是一种生物信息学.
- 基因组学就是基因组学.
背景情况:
- 异常的替代拼接可以产生新抗原,可能刺激免疫反应.
- 目前用于量化拼接衍生的新抗原的现有方法存在局限性,包括依赖独立参考和易受批量效应的影响.
研究的目的:
- 介绍SpliceMutr,这是一个生物信息学管道,用于从瘤和正常数据中识别拼接衍生的新抗原.
- 分析跨癌症基因组图谱 (TCGA) 的拼接抗原性,并调查其与抗瘤免疫力和免疫治疗反应的关系.
主要方法:
- 开发了SpliceMutr,这是一个用于识别瘤特异抗原拼接变体的计算管道.
- 每个基因预测的MHC结合亲和力和估计的拼接抗原性得分.
- 应用SpliceMutr到TCGA转录数据,并分析了用免疫检查点抑制剂治疗黑色素瘤患者的队列.
主要成果:
- 识别了来自拼接的新抗原和跨癌症类型的抗原性得分,发现与抗瘤免疫生物标志物的相关性.
- 与正常组织相比,在瘤中观察到更高的拼接抗原性,以及在拼接机械基因突变的患者中观察到更高的拼接抗原性.
- 发现拼接抗原性在响应免疫检查点抑制剂 (ICI) 治疗时发生变化,响应者抗原性增加,非响应者 (进展者) 抗原性降低.
结论:
- SpliceMutr提供了一种新的计算方法来分析拼接抗原性.
- 接抗原性在瘤中较高,受接机械突变的影响,并与免疫治疗反应相关.
- 需要进一步的泛癌研究来阐明拼接抗原性和ICI反应之间的相互作用.
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